Detection method, detection device, vehicle and electronic device

Abstract

The invention provides a detection method, a detection device, a vehicle and an electronic device. According to the detection method, if the detection device determines that a breakpoint exists in the optical fiber sensor, measurement light carrier waves are provided for a first optical fiber part and a second optical fiber part of the optical fiber sensor respectively, so that measurement points on the first optical fiber part and the second optical fiber part are detected. The first optical fiber part and the second optical fiber part are located on the two sides of the breakpoint. By adopting the detection method, the safety and reliability of the optical fiber sensor can be effectively improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sensing, and in particular to a detection method, a detection device, a vehicle and an electronic device. BACKGROUND

[0002] With the increasing maturity of fiber sensor technology and the gradual decline of manufacturing cost, in recent years, fiber sensors are gradually entering the consumer field, especially the automotive industry. Fiber sensors bring significant performance improvement to the vehicle sensing system with their multiplied detection points, excellent detection accuracy and environmental tolerance.

[0003] The existing fiber sensor usually has multiple measurement points distributed thereon. The measurement light carrier accessed by the fiber sensor will pass through these measurement points in turn. The measurement light carrier will be modulated at each measurement point, and the modulated measurement light signal will be reflected or refracted. These measurement light signals can be calculated to obtain the physical quantity on the physical space where each measurement point is located. When the fiber sensor fails (such as a breakpoint), the affected measurement points may not have measurement light passing through due to the influence of the fault point, which will make these affected measurement points unable to normally feedback the measurement light signal, so that the fiber sensor cannot normally complete the detection of each physical quantity. It can be understood that the vehicle environment is relatively complex, and the fiber sensor is prone to failure due to various complex working conditions and accidental events such as collision. Therefore, the reliability and safety of the existing fiber sensor in the vehicle environment are poor. SUMMARY

[0004] The embodiments of the present application provide a detection method, a detection device, a vehicle and an electronic device. The detection method can solve the problem of poor reliability and safety of the fiber sensor in the vehicle environment.

[0005] In a first aspect, the embodiments of the present application provide a detection method, which is suitable for a detection device connected with a fiber sensor. The method comprises: determining that the fiber sensor has a breakpoint; and providing a measurement light carrier for a first fiber part and a second fiber part of the fiber sensor respectively, so that the measurement points on the first fiber part and the second fiber part are detected. The first fiber part and the second fiber part are located on both sides of the breakpoint.

[0006] In the implementation, if the detection device determines that the fiber sensor has a breakpoint, the first fiber part and the second fiber part located on two sides of the breakpoint are respectively provided with corresponding measurement light carriers, so that the measurement points on the first fiber part and the second fiber part can be detected. In this way, even if the fiber sensor has a breakpoint due to a fault, the measurement points on the fiber sensor that are not affected by the breakpoint can still have the measurement light carriers passing through, so that the measurement points that are not affected by the breakpoint can still normally feed back the measurement light signals. Therefore, the fiber sensor can still continue to complete the measurement of the physical quantity, effectively improving the safety and reliability of the fiber sensor. When the detection method is used in a vehicle-mounted environment, the problem that the existing fiber sensor has poor reliability and safety in a vehicle-mounted environment can be overcome.

[0007] With reference to the first aspect, in a possible implementation, the first fiber part and the second fiber part of the fiber sensor are respectively provided with the measurement light carriers to enable the measurement points on the first fiber part and the second fiber part to be detected, and the method comprises: obtaining a first length of the first fiber part and a second length of the second fiber part; and adjusting a first time length for providing the measurement light carrier to the first fiber part, a second time length for providing the measurement light carrier to the second fiber part, and a physical quantity calculation algorithm according to the first length and the second length, so that all the measurement points on the first fiber part and the second fiber part are detected.

[0008] With reference to the first aspect, in a possible implementation, the determination that the fiber sensor has a breakpoint comprises: obtaining a first measurement result corresponding to the fiber sensor in a first measurement period, wherein the first measurement result comprises at least one first measurement point detected from the fiber sensor in the first measurement period; and if it is determined that a first measurement point number corresponding to the at least one first measurement point is less than a first preset number, it is determined that the fiber sensor has a breakpoint.

[0009] With reference to the first aspect, in a possible implementation, the first preset number is determined according to a rated measurement point number of the fiber sensor, a unit blind area length of the fiber sensor, and a total fiber length of the fiber sensor.

[0010] With reference to the first aspect, in a possible implementation, the first preset number satisfies the following formula:

[0011]

[0012] wherein N1 is the first preset number, N0 is the rated measurement point number of the fiber sensor, S is the unit blind area length of the fiber sensor, and L0 is the total fiber length of the fiber sensor.

[0013] With reference to the first aspect, in a possible implementation, the detection device includes a light source and a probe collection assembly, the measurement light carrier is pulsed laser provided by the light source, and the first measurement period includes at least a plurality of pulse periods corresponding to the pulsed laser. The first length of the first optical fiber part and the second length of the second optical fiber part are obtained by: obtaining a first time point, wherein the first time point is a time point at which the probe collection assembly last collects the first measurement light signal from the first optical fiber part in a first pulse period in the first measurement period; determining a first transmission duration of the measurement light carrier corresponding to the first measurement light signal in the first optical fiber part according to the first time point; determining the first length of the first optical fiber part according to the first transmission duration; and determining the second length of the second optical fiber part according to the first length and a total length of the optical fiber of the optical fiber sensor.

[0014] With reference to the first aspect, in a possible implementation, the first transmission duration of the measurement light carrier corresponding to the first measurement light signal in the first optical fiber part is determined according to the first time point, including: calculating a second transmission duration according to the first time point and a starting time point of the first pulse period; and calculating the first transmission duration of the measurement light carrier in the first optical fiber part according to the second transmission duration, a third transmission duration of the measurement light carrier corresponding to the first measurement light signal from the light source to the first end of the optical fiber sensor, and a fourth transmission duration of the first measurement light signal from the first end of the optical fiber sensor to the probe collection assembly, wherein the first end is located in the first optical fiber part.

[0015] With reference to the first aspect, in a possible implementation, the first measurement result further includes at least one first physical space corresponding to the at least one first measurement point. The adjusting the first length and the second length to determine the first time length for providing the measurement optical carrier to the first optical fiber part, the second time length for providing the measurement optical carrier to the second optical fiber part, and the physical quantity solving algorithm, until it is determined that all the measurement points on the first optical fiber part and the second optical fiber part are detected, comprises: determining, according to the first length, a first value corresponding to the first time length for emitting the measurement optical carrier to the first optical fiber part; determining, according to the second length, a second value corresponding to the second time length for emitting the measurement optical carrier to the second optical fiber part; determining, according to the first length and the second length, a first blind area range corresponding to the optical fiber sensor in a first measurement period; determining, according to the first value, the second value, the first blind area range, and a correspondence relationship between the at least one first measurement point and the at least one first physical space, that at least one of the first time length, the second time length, and the physical quantity solving algorithm does not satisfy a working state of the optical fiber sensor, then updating the first time length by using the first value to obtain an updated first time length, updating the second time length by using the second value to obtain an updated second time length, and updating the physical quantity solving algorithm by using the first blind area range, a number of the first measurement points, and the correspondence relationship between the at least one first measurement point and the at least one first physical space to obtain an updated first physical quantity solving algorithm; and detecting the first optical fiber part and the second optical fiber part by using the updated first time length, the updated second time length, and the first physical quantity solving algorithm, until it is determined that all the measurement points on the first optical fiber part and the second optical fiber part are detected.

[0016] With reference to the first aspect, in a possible implementation, the first optical fiber part and the second optical fiber part are detected by using the updated first time length, the updated second time length and the first physical quantity solving algorithm until it is determined that all the measurement points on the first optical fiber part and the second optical fiber part are detected, including: obtaining a second measurement result of the optical fiber sensor in the second measurement period, wherein the second measurement result includes at least one second measurement point detected from the first optical fiber part in the second measurement period and at least one second physical space corresponding to the at least one second measurement point, and the second measurement result further includes at least one third measurement point detected from the second optical fiber part in the second measurement period and at least one third physical space corresponding to the at least one third measurement point; if it is determined according to the second measurement result that the optical fiber sensor has a breakpoint, obtaining a third length of the first optical fiber part of the optical fiber sensor and a fourth length of the second optical fiber part; determining a third value corresponding to the first time length according to the third length; determining a fourth value corresponding to the second time length according to the fourth length; determining a second blind area range of the optical fiber sensor in the second measurement period according to the third length and the fourth length; and if it is determined according to the third value, the fourth value, the second blind area range, a correspondence relationship between the at least one second measurement point and the at least one second physical space, and a correspondence relationship between the at least one third measurement point and the at least one third physical space that the updated first time length, the updated second time length and the first physical quantity solving algorithm all meet the working state of the optical fiber sensor, it is determined that all the measurement points on the first optical fiber part and the second optical fiber part are detected.

[0017] With reference to the first aspect, in a possible implementation, the third length of the first optical fiber part of the optical fiber sensor is obtained, including: obtaining a second time point, wherein the second time point is a time point at which the detection and collection component last collects the first measurement optical signal from the first end in a second pulse period in the second measurement period. A fifth transmission time length of a measurement optical carrier corresponding to the first measurement optical signal in the first optical fiber part is determined according to the second time point, and the third length of the first optical fiber part is determined according to the fifth transmission time length.

[0018] With reference to the first aspect, in a possible implementation, the fourth length of the second optical fiber part of the optical fiber sensor is obtained, including: obtaining a third time point, wherein the third time point is a time point at which the detection and collection component last collects the second measurement optical signal from the second end in a third pulse period in the second measurement period. A sixth transmission time length of a measurement optical carrier corresponding to the second measurement optical signal in the second optical fiber part is determined according to the third time point, and the fourth length of the second optical fiber part is determined according to the sixth transmission time length.

[0019] With reference to the first aspect, in a possible implementation, the method further includes: if it is determined that at least one of the following conditions is met: the third value is not equal to the first value, the fourth value is not equal to the second value, the second blind area range is different from the first blind area range, the correspondence between the at least one first measurement point and the at least one first physical space does not include the correspondence between the at least one second measurement point and the at least one second physical space and the correspondence between the at least one third measurement point and the at least one third physical space, it is determined that at least one of the updated first time length, the updated second time length, and the first physical quantity calculation algorithm currently used by the detection device does not meet the working state of the fiber sensor.

[0020] With reference to the first aspect, in a possible implementation, the method further includes: if it is determined that at least one of the following conditions is met: the third value is not equal to the first value, the fourth value is not equal to the second value, the second blind area range is different from the first blind area range, the correspondence between the at least one first measurement point and the at least one first physical space does not include the correspondence between the at least one second measurement point and the at least one second physical space and the correspondence between the at least one third measurement point and the at least one third physical space, it is determined that at least one of the updated first time length, the updated second time length, and the first physical quantity calculation algorithm currently used by the detection device does not meet the working state of the fiber sensor.

[0021] With reference to the first aspect, in a possible implementation, the method further includes: if it is determined that at least one of the following conditions is met: the third value is not equal to the first value, the fourth value is not equal to the second value, the second blind area range is different from the first blind area range, the correspondence between the at least one first measurement point and the at least one first physical space does not include the correspondence between the at least one second measurement point and the at least one second physical space and the correspondence between the at least one third measurement point and the at least one third physical space, it is determined that at least one of the updated first time length, the updated second time length, and the first physical quantity calculation algorithm currently used by the detection device does not meet the working state of the fiber sensor.

[0022] With reference to the first aspect, in a possible implementation, the second measurement result further includes at least one second measurement data corresponding to the at least one second measurement point and at least one third measurement data corresponding to the at least one third measurement point; after determining that all the measurement points on the first optical fiber part and the second optical fiber part are detected, the method further includes: outputting the at least one first measurement data corresponding to the at least one second measurement point and the at least one second measurement data corresponding to the at least one third measurement point.

[0023] With reference to the first aspect, in a possible implementation, the method further includes: if it is determined that the sum of the second measurement point number corresponding to the at least one second measurement point and the third measurement point number corresponding to the at least one third measurement point is less than the second preset number, determining that the optical fiber sensor has at least two breakpoints; if it is determined that the sum of the second measurement point number and the third measurement point number is equal to the second preset number, determining that the optical fiber sensor has one breakpoint.

[0024] With reference to the first aspect, in a possible implementation, the second preset number is determined according to a rated measurement point number of the optical fiber sensor, a unit blind area length of the optical fiber sensor, and a total optical fiber length of the optical fiber sensor.

[0025] With reference to the first aspect, in a possible implementation, the second preset number satisfies the following formula:

[0026]

[0027] wherein, N2 is the second preset number.

[0028] With reference to the first aspect, in a possible implementation, the method further includes: if it is determined that the first measurement point number is equal to the first preset number, determining that the optical fiber sensor has no breakpoint.

[0029] The second aspect provides a detection device, and the detection method provided in the first aspect or any one of the possible implementation manners of the first aspect is applicable to the detection device. The detection device includes a light source, a circulator, a light switch, and a detection control component. The detection control component is connected to the light source, the circulator, and the light switch. The light source is connected to the light switch through the circulator. The light switch is connected to a first end and a second end of the optical fiber sensor. The first end is located on a first optical fiber part of the optical fiber sensor, and the second end is located on a second optical fiber part of the optical fiber sensor.

[0030] With reference to the second aspect, in a possible implementation, the detection control component is configured to determine that the optical fiber sensor has a breakpoint. The detection control component is further configured to control the light switch to provide measurement light carriers for the first optical fiber part and the second optical fiber part of the optical fiber sensor, so that the measurement points on the first optical fiber part and the second optical fiber part are detected. The first optical fiber part and the second optical fiber part are located on two sides of the breakpoint.

[0031] In the above implementation, if the detection device determines that the fiber sensor has a breakpoint, the first fiber part and the second fiber part located on both sides of the breakpoint are respectively provided with corresponding measurement light carriers, so that the measurement points on the first fiber part and the second fiber part can be detected. In this way, even if the fiber sensor has a breakpoint due to a fault, the measurement points on the fiber sensor that are not affected by the breakpoint can still have the measurement light carriers passing through, so that these measurement points that are not affected by the breakpoint can still normally feed back the measurement light signals. Therefore, the fiber sensor can still continue to complete the measurement of the physical quantity, effectively improving the safety and reliability of the fiber sensor. By using the detection method in the vehicle environment, the problem that the existing fiber sensor has poor reliability and safety in the vehicle environment can be overcome.

[0032] With reference to the second aspect, in a possible implementation, the detection control component is configured to: obtain a first length of the first fiber part and a second length of the second fiber part; and adjust, according to the first length and the second length, a first time length for providing the measurement light carrier to the first fiber part, a second time length for providing the measurement light carrier to the second fiber part, and the physical quantity calculation algorithm, until it is determined that all the measurement points on the first fiber part and the second fiber part are detected.

[0033] With reference to the second aspect, in a possible implementation, under the control of the detection control component, the optical switch is configured to establish a connection between the circulator and the first end or the second end, to respectively provide the measurement light carrier output by the circulator to the first fiber part or the second fiber part, and to respectively provide the measurement light signals output by the first fiber part or the second fiber part to the circulator.

[0034] With reference to the second aspect, in a possible implementation, the circulator is configured to transmit the measurement light carrier generated by the light source to the optical switch. The circulator is further configured to transmit the measurement light carrier generated by the light source to the optical switch; the detection control component is configured to control the optical switch to establish a connection between the circulator and the first end or the second end, to respectively provide the measurement light carrier to the first fiber part or the second fiber part; the circulator is further configured to transmit the measurement light signals from the optical switch to the detection control component; the detection control component is further configured to generate a measurement result corresponding to any measurement period based on the measurement light signals received from the circulator in any measurement period; and the detection control component is further configured to, in a case where it is determined according to the measurement result corresponding to any measurement period that the fiber sensor has a breakpoint, obtain a first length of the first fiber part and a second length of the second fiber part, and adjust, according to the first length and the second length, a first time length for providing the measurement light carrier to the first fiber part, a second time length for providing the measurement light carrier to the second fiber part, and the physical quantity calculation algorithm, until it is determined that all the measurement points on the first fiber part and the second fiber part are detected.

[0035] With reference to the second aspect, in a possible implementation manner, the detection control component comprises a probe acquisition component, a signal processor and a controller, the probe acquisition component is connected with the circulator, the probe acquisition component is further connected with the controller through the signal processor, and the controller is further connected with the optical switch; the probe acquisition component is configured to generate one or more acquisition results corresponding to any measurement period based on the measurement light signal received from the circulator in the any measurement period; the signal processor is configured to solve one or more acquisition results corresponding to any measurement period based on a physical quantity solving algorithm to obtain one or more probe results corresponding to the any measurement period; the signal processor is further configured to process the one or more probe results corresponding to the any measurement period to obtain a measurement result corresponding to the any measurement period; and the controller is configured to, in a case where it is determined according to the measurement result corresponding to the any measurement period that the fiber optic sensor has a breakpoint, acquire a first length of the first fiber part and a second length of the second fiber part, and adjust the first length and the second length to obtain a first time length for providing the measurement light carrier for the first fiber part, a second time length for providing the measurement light carrier for the second fiber part, and the physical quantity solving algorithm, until it is determined that all measurement points on the first fiber part and the second fiber part are detected.

[0036] With reference to the second aspect, in a possible implementation manner, the signal processor is configured to: acquire a first measurement result corresponding to a first measurement period of the fiber optic sensor, wherein the first measurement result comprises at least one first measurement point detected from the fiber optic sensor in the first measurement period; and the controller is configured to: if it is determined that a first measurement point number corresponding to the at least one first measurement point is less than a first preset number, it is determined that the fiber optic sensor has a breakpoint.

[0037] With reference to the second aspect, in a possible implementation manner, the first preset number is determined according to a rated measurement point number of the fiber optic sensor, a unit blind area length of the fiber optic sensor and a total fiber length of the fiber optic sensor.

[0038] With reference to the second aspect, in a possible implementation manner, the first preset number satisfies the following formula:

[0039]

[0040] wherein N1 is the first preset number, N0 is the rated measurement point number of the fiber optic sensor, S is the unit blind area length of the fiber optic sensor, and L0 is the total fiber length of the fiber optic sensor.

[0041] With reference to the second aspect, in a possible implementation manner, the controller is further configured to: acquire a first time point, wherein the first time point is a time point at which the detection and collection component last collects the first measurement optical signal from the first optical fiber section in a first pulse period in the first measurement period; determine a first transmission duration of the measurement optical carrier corresponding to the first measurement optical signal in the first optical fiber section according to the first time point; determine the first length of the first optical fiber section according to the first transmission duration; and determine the second length of the second optical fiber section according to the first length and a total length of the optical fiber of the optical fiber sensor.

[0042] With reference to the second aspect, in a possible implementation manner, the controller is further configured to: calculate a second transmission duration according to the first time point and a start time point of the first pulse period; calculate the first transmission duration of the measurement optical carrier in the first optical fiber section according to the second transmission duration, a third transmission duration of the measurement optical carrier transmitted from the light source to a first end of the optical fiber sensor, and a fourth transmission duration of the first measurement optical signal transmitted from the first end to the detection and collection component, wherein the first end is located in the first optical fiber section.

[0043] With reference to the second aspect, in a possible implementation manner, the first measurement result further includes at least one first physical space corresponding to at least one first measurement point. The controller is further configured to: determine a first value corresponding to a first duration of transmitting the measurement optical carrier to the first optical fiber section according to the first length; determine a second value corresponding to a second duration of transmitting the measurement optical carrier to the second optical fiber section according to the second length; determine a first blind area range of the optical fiber sensor in the first measurement period according to the first length and the second length; and determine that at least one of the first duration, the second duration, and a physical quantity calculation algorithm in the signal processor does not meet a working state of the optical fiber sensor according to the first value, the second value, the first blind area range, and a correspondence between the at least one first measurement point and the at least one first physical space, update the first duration by using the first value to obtain an updated first duration, update the second duration by using the second value to obtain an updated second duration, and update the physical quantity calculation algorithm in the signal processor by using the first blind area range, a number of the first measurement points, and the correspondence between the at least one first measurement point and the at least one first physical space to obtain an updated first physical quantity calculation algorithm; in the second measurement period, control the optical switch to establish the connection between the circulator and the first end in the updated first duration, and establish the connection between the circulator and the second end in the updated second duration; and detect the first optical fiber section and the second optical fiber section again until all the measurement points on the first optical fiber section and the second optical fiber section are detected.

[0044] With reference to the second aspect, in a possible implementation manner, the controller is configured to: acquire, by the detection and acquisition assembly and the signal processor, a second measurement result of the optical fiber sensor in the second measurement period, where the second measurement result includes at least one second measurement point detected from the first optical fiber part in the second measurement period and at least one second physical space corresponding to the at least one second measurement point, and the second measurement result further includes at least one third measurement point detected from the second optical fiber part in the second measurement period and at least one third physical space corresponding to the at least one third measurement point; if it is determined according to the second measurement result that the optical fiber sensor has a breakpoint, acquire a third length of the first optical fiber part and a fourth length of the second optical fiber part of the optical fiber sensor; determine a third value corresponding to the first time length according to the third length; determine a fourth value corresponding to the second time length according to the fourth length; determine a second blind area range of the optical fiber sensor in the second measurement period according to the third length and the fourth length; and if it is determined according to the third value, the fourth value, the second blind area range, a correspondence relationship between the at least one second measurement point and the at least one second physical space, and a correspondence relationship between the at least one third measurement point and the at least one third physical space that the updated first time length, the updated second time length, and the first physical quantity calculation algorithm all meet the working state of the optical fiber sensor, it is determined that all the measurement points on the first optical fiber part and the second optical fiber part are detected.

[0045] With reference to the second aspect, in a possible implementation manner, the controller is configured to: acquire a second time point, where the second time point is a time point at which the detection and acquisition assembly last acquires the first measurement optical signal from the first end in a second pulse period in the second measurement period. Determine a fifth transmission time length of a measurement optical carrier corresponding to the first measurement optical signal in the first optical fiber part according to the second time point, and determine a third length of the first optical fiber part according to the fifth transmission time length.

[0046] With reference to the second aspect, in a possible implementation manner, the controller is configured to: acquire a third time point, where the third time point is a time point at which the detection and acquisition assembly last acquires the second measurement optical signal from the second end in a third pulse period in the second measurement period. Determine a sixth transmission time length of a measurement optical carrier corresponding to the second measurement optical signal in the second optical fiber part according to the third time point, and determine a fourth length of the second optical fiber part according to the sixth transmission time length.

[0047] With reference to the second aspect, in a possible implementation manner, the controller is further configured to: if it is determined that at least one of the first time length, the second time length, and the first physical quantity calculation algorithm currently used by the detection device does not meet the working state of the fiber sensor according to the third value, the fourth value, the second blind area range, the correspondence between the at least one second measurement point and the at least one second physical space, and the correspondence between the at least one third measurement point and the at least one third physical space, update the first time length by using the third value to obtain a second updated first time length, update the second time length by using the fourth value to obtain a second updated second time length, and update the first physical quantity calculation algorithm used for signal processing by using the second blind area range, the second measurement point quantity, the third measurement point quantity, the correspondence between the at least one second measurement point and the at least one second physical space, and the correspondence between the at least one third measurement point and the at least one third physical space to obtain an updated second physical quantity calculation algorithm; and control the optical switch to establish the connection between the circulator and the first end for the second updated first time length and establish the connection between the circulator and the second end for the second updated second time length in the third measurement period; and then detect the first optical fiber part and the second optical fiber part again until it is determined that all the measurement points on the first optical fiber part and the second optical fiber part are detected.

[0048] With reference to the second aspect, in a possible implementation manner, the controller is further configured to: if it is determined that at least one of the third value is not equal to the first value, the fourth value is not equal to the second value, the second blind area range is not the same as the first blind area range, the correspondence between the at least one second measurement point and the at least one second physical space is not included in the correspondence between the at least one first measurement point and the at least one first physical space, and the correspondence between the at least one third measurement point and the at least one third physical space, it is determined that at least one of the first time length, the second time length, and the first physical quantity calculation algorithm currently used by the detection device does not meet the working state of the fiber sensor.

[0049] With reference to the second aspect, in a possible implementation manner, the controller is further configured to: if it is determined that the sum of the second measurement point quantity corresponding to the at least one second measurement point and the third measurement point quantity corresponding to the at least one third measurement point is less than the second preset quantity, it is determined that the fiber sensor has at least two breakpoints; and if it is determined that the sum of the second measurement point quantity and the third measurement point quantity is equal to the second preset quantity, it is determined that the fiber sensor has one breakpoint.

[0050] With reference to the second aspect, in a possible implementation, the second preset quantity is determined according to a rated measurement point quantity of the fiber sensor, a unit blind area length of the fiber sensor, and a total fiber length of the fiber sensor.

[0051] With reference to the second aspect, in a possible implementation manner, the second preset quantity satisfies the following formula:

[0052]

[0053] N2 is a second preset number.

[0054] With reference to the second aspect, in a possible implementation, the controller is further configured to: if it is determined that the first number of measurement points is equal to the first preset number, determine that the fiber sensor does not have a break point.

[0055] In a third aspect, the present application provides a vehicle, which comprises the detection device and the fiber sensor according to the second aspect and any possible implementation of the second aspect.

[0056] In a fourth aspect, the present application provides an electronic device. The electronic device comprises a processor, and the processor is connected with a memory. The memory is configured to store a computer program. The processor is configured to execute the computer program stored in the memory, so that the electronic device executes the method according to the first aspect or any possible implementation of the first aspect.

[0057] With reference to the fourth aspect, in a possible implementation, the detection device according to the second aspect or any possible implementation of the second aspect comprises the electronic device.

[0058] Optionally, the electronic device can be the controller included in the detection device according to the second aspect or any possible implementation of the second aspect.

[0059] By implementing the embodiments of the present application, even if the fiber sensor has a break point due to a fault, the measurement points on the fiber sensor that are not affected by the break point can still have a measurement light carrier passing through, so that these measurement points that are not affected by the break point can still normally feedback a measurement light signal. Therefore, the fiber sensor can still continue to complete the measurement of a part of physical quantities, effectively improving the safety and reliability of the fiber sensor. BRIEF DESCRIPTION OF DRAWINGS

[0060] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor based on these drawings.

[0061] Figure 1 is a flowchart of a detection method provided by the present application;

[0062] Figure 2 is a schematic diagram of an application scene of a detection device provided by the present application;

[0063] Figure 3 is another application scenario of the detection device provided in the application;

[0064] Figure 4 is a structural schematic diagram of the detection device provided in the application;

[0065] Figure 5 is another structural schematic diagram of the detection device provided in the application;

[0066] Figure 6 is a structural schematic diagram of a vehicle provided in an embodiment of the application. DETAILED DESCRIPTION

[0067] In order for those skilled in the art to better understand the scheme of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application.

[0068] The system architecture to which the embodiments of the present application are applied will be introduced below. It should be noted that the system architecture and business scenarios described in the present application are for more clearly illustrating the technical solutions of the present application, and do not constitute a limitation on the technical solutions provided in the present application. It should be understood that, as the system architecture evolves and new business scenarios appear, the technical solutions provided in the present application are also applicable to similar technical problems.

[0069] There are usually multiple measurement points distributed on an existing optical fiber sensor. The measurement light carrier accessed by the optical fiber sensor will pass through these measurement points in turn. The measurement light carrier will be modulated at each measurement point, and the modulated measurement light signal will be reflected or refracted. These measurement light signals can be solved to obtain the physical quantity on the physical space where each measurement point is located. When the optical fiber sensor fails (such as a breakpoint occurs), affected by the fault point, no measurement light wave can pass through some measurement points, which will make these affected measurement points no longer normally feedback the measurement light signal, so that the optical fiber sensor can no longer normally complete the detection of each physical quantity. It can be understood that the vehicle-mounted environment is relatively complex, and various complex working conditions and collision accidents can easily cause the optical fiber sensor to fail. Therefore, the reliability and safety of the existing optical fiber sensor in the vehicle-mounted environment are poor.

[0070] Therefore, the technical problem to be solved by the present application is how to improve the safety and reliability of the optical fiber sensor in the vehicle-mounted environment.

[0071] To solve the above problems, the application provides a detection method for an optical fiber sensor, a detection device and a vehicle. In the detection method, if it is determined that the optical fiber sensor has a breakpoint, the first optical fiber part and the second optical fiber part located on both sides of the breakpoint are respectively provided with corresponding measurement light carriers, so that the measurement points on the first optical fiber part and the second optical fiber part can be detected. In this way, even if the optical fiber sensor has a breakpoint due to a fault, the measurement points on the optical fiber sensor that are not affected by the breakpoint can still have measurement light carriers passing through, so that these measurement points that are not affected by the breakpoint can still normally feedback measurement light signals. Therefore, the optical fiber sensor can still continue to complete the measurement of part of the physical quantity, effectively improving the safety and reliability of the optical fiber sensor. Using the detection method in a vehicle environment can overcome the problem that the existing optical fiber sensor has poor reliability and safety in a vehicle environment.

[0072] Embodiment one

[0073] Please refer to Figure 1 , Figure 1 is a flowchart of a detection method provided by the application. It should be noted that the detection method provided by the application is applicable to a detection device connected with an optical fiber sensor. In order to facilitate the explanation, the detection principle of the detection device provided by the application will be explained simply. For example, please refer to Figure 2 , Figure 2 is a schematic diagram of an application scene of a detection device provided by the application. As shown in Figure 2 , the detection device 20 is connected with the first end 301 of the optical fiber sensor 30 and the second end 302 of the optical fiber sensor respectively. The optical fiber sensor 30 can be provided with a plurality of measurement points. For the convenience of explanation, the application assumes that the optical fiber sensor 30 is provided with six measurement points, which are measurement point 1 to measurement point 6 shown in Figure 2 , and the six measurement points correspond to six physical spaces, and each measurement point is used to perceive the physical quantity on each physical space. In actual work, the detection device 20 can provide the measurement light carrier for the optical fiber sensor 30 from the first end 301 and acquire the measurement light signal (for the convenience of distinction, the first measurement light signal will be used instead of the expression hereinafter) fed back by the optical fiber sensor 30 at the first end 301. Then, the detection device 20 can process the first measurement light signal to obtain the physical quantity measured by part or all of the measurement points on the optical fiber sensor 30. Similarly, the detection device 20 can also provide the measurement light carrier for the optical fiber sensor 30 from the second end 302 and acquire the measurement light signal (for the convenience of distinction, the second measurement light signal will be used instead of the expression hereinafter) fed back by the optical fiber sensor 30 at the second end 302. Then, the detection device 20 can process the second measurement light signal to obtain the physical quantity measured by part or all of the measurement points on the optical fiber sensor 30.

[0074] In the following, the application will be described in combination withFigure 2 The specific implementation process of the detection method provided in the present application is described in detail.

[0075] As shown in Figure 1 The detection method can include the following steps:

[0076] S10, determining that the optical fiber sensor has a breakpoint.

[0077] In some possible implementation manners, after being powered on, the detection device 20 can first determine whether there is a breakpoint on the optical fiber sensor 30.

[0078] In a specific implementation, the detection device 20 can first obtain a measurement result (for the convenience of description, the first measurement result will be used instead of the description hereinafter) corresponding to the optical fiber sensor 30 in a certain measurement period (for the convenience of distinction, the first measurement period will be used instead of the description hereinafter). In the first measurement result, at least one first measurement point that can be detected by the detection device 20 from the optical fiber sensor 30 in the first measurement period, and third measurement data corresponding to each first measurement point in the at least one first measurement point are included. Here, it is assumed that the number of first measurement points is A1, that is, the first measurement result includes A1 first measurement points and A1 first measurement data corresponding thereto. It should be understood that the measurement data corresponding to each measurement point is the measurement value of the to-be-measured physical quantity of the physical space where each measurement point is located.

[0079] It should be noted that, assuming that the fiber sensor 30 does not have a break point, the detection device 20 provides the measurement light carrier to the fiber sensor 30 through the first end 301 as an example. The detection device 20 will continuously provide the measurement light carrier to the fiber sensor 30 through the first end 301, and continuously obtain the first measurement light signal from the first end 301, which is the feedback of the fiber sensor 30 to the measurement light carrier. The detection device 20 will obtain a measurement result based on the first measurement light signal obtained in a measurement period, and each measurement result can include six measurement data corresponding to the measurement points 1 to 6. Generally, the detection device 20 provides the measurement light carrier to the fiber sensor in the form of pulsed laser. A measurement period can include a plurality of pulse periods corresponding to the pulsed laser, and in a pulse period (also referred to as a detection period), the detection device 20 will obtain a detection result based on the first measurement light signal obtained in the pulse period. The measurement result corresponding to a measurement period is determined by the detection device 20 based on a plurality of detection results obtained in the measurement period. For example, the plurality of detection results can be averaged to obtain a measurement result. Further, a pulse period corresponds to a plurality of specific sampling times. In a pulse period, the detection device 20 will sample the first end 301 according to a set sampling frequency to obtain a plurality of first measurement light signals. Then, the detection device 20 will photoelectrically convert the first measurement light signals collected at the plurality of specific sampling times to obtain a collection result. It should be understood that a collection result includes a plurality of first measurement electrical signals corresponding to the pulse period. Then, the detection device 20 can process the collection result by using an internal calculation algorithm to obtain a detection result corresponding to the pulse period. The detection result includes six measurement data corresponding to the measurement points 1 to 6 obtained in the pulse period. Taking the first measurement result as an example, the first measurement result is determined by the detection device 20 based on a plurality of detection results obtained in a first measurement period, and each detection result is obtained by the detection device 20 based on a collection result obtained in each pulse period.

[0080] It should be further noted that the physical quantity calculation algorithm provided in the present application mainly refers to the processing method used by the detection device 20 to convert a plurality of measurement electrical signals obtained in each pulse period into measurement data corresponding to each measurement point, and the specific content of the physical quantity calculation algorithm is not limited in the present application.

[0081] Further, after obtaining the first measurement result corresponding to the first measurement period, the detection device 20 can compare the first measurement point number A1 corresponding to the first measurement result with the first preset number N1, and determine whether there is a break point on the fiber sensor 30 according to the comparison result.

[0082] Optionally, if the detection device 20 determines that the first number of measurement points A1 is less than the first preset number N1, it can be determined that the fiber sensor 30 has a break. If the detection device 20 determines that the first number of measurement points A1 is equal to or greater than the first preset number N1, it can be determined that the fiber sensor 30 has no break. Alternatively, the detection device 20 can calculate the difference A1-N1 between the first number of measurement points A1 and the first preset number N1. If it is determined that the difference A1-N1 is equal to or greater than 0, it is determined that the fiber sensor 30 has no break. If it is determined that the difference A1-N1 is less than 0, it can be determined that the fiber sensor 30 has a break.

[0083] Optionally, the first preset number is determined according to the rated number of measurement points of the fiber sensor, the unit blind zone length of the fiber sensor, and the total fiber length of the fiber sensor.

[0084] For example, the above-mentioned first preset number N1 can satisfy the following formula:

[0085]

[0086] where N0 is the rated number of measurement points of the fiber sensor 30. In combination with the example described above, the value of N0 can be 6. S is the unit blind zone length of the fiber sensor. It should be noted that in actual implementation, due to the structure of the fiber sensor 30 itself or the break, some fiber regions on the fiber sensor 30 cannot be equipped with measurement points, which are usually referred to as blind zones. In the case where the fiber sensor 30 has no break, there will be two blind zones near the first end 301 and the second end 302, and the length of the two blind zones is the unit blind zone length described above. Similarly, on both sides of a single break, two blind zones of unit blind zone length will also be generated. L0 is the total fiber length of the fiber sensor 30, or in other words, L0 is the length of the fiber part of the fiber sensor 30.

[0087] Optionally, if the detection device 20 determines that there is no break on the fiber sensor 30, it can only provide a measurement light carrier for the fiber sensor 30 from the first end 301 or the second end 302 in each measurement period, and obtain the corresponding measurement result. Until a new measurement arrives, the operation of determining whether the fiber sensor 30 has a break described above is performed again.

[0088] S20, respectively, provides a measurement light carrier for the first fiber part and the second fiber part of the fiber sensor, so that the measurement points on the first fiber part and the second fiber part are detected.

[0089] In some possible implementation manners, the detection apparatus 20 can provide the measurement light carrier for the first optical fiber part 303 and the second optical fiber part 304 respectively if it is determined according to the first measurement result that the fiber sensor 30 has a breakpoint, so that the measurement points on the first optical fiber part 303 and the second optical fiber part 304 are detected.

[0090] Please refer to Figure 3 , Figure 3 is another application scenario of the detection apparatus provided in the present application. As shown in Figure 3 , in the case where the fiber sensor 30 has a breakpoint, whether the breakpoint is one or more, the breakpoint will cause a blind area on the fiber sensor 30, and the blind area will cause the measurement points located in the blind area to fail to generate complete detection. As shown in Figure 3 , the measurement point 3 and the measurement point 4 are located in the blind area, and the measurement point 3 and the measurement point 4 cannot work normally. In the embodiment of the present application, the optical fiber parts on the fiber sensor 30 located on both sides of the breakpoint (or both sides of the blind area caused by the breakpoint) and capable of normally conducting the light carrier are respectively referred to as the first optical fiber part 303 and the second optical fiber part 304. The first end 301 is located on the first optical fiber part 303, or the first optical fiber part 303 is close to the first end 301. The second end 302 is located on the second optical fiber part 304, or the second optical fiber part 304 is close to the second end 302. The measurement point 1 and the measurement point 2 are located on the first optical fiber part 303, and the measurement point 5 and the measurement point 6 are located on the second optical fiber part, so the measurement point 1, the measurement point 2, the measurement point 5 and the measurement point 6 can work normally. It should be understood that in the embodiment of the present application, the total length of the first optical fiber part 301, the second optical fiber part 302 and the blind area caused by the breakpoint is the total length L0 of the fiber sensor 30. It should be understood that Figure 3 only one breakpoint is shown in the figure, but in actual implementation, there can be one or more breakpoints. Whether there is one or more breakpoints, the first optical fiber part 303 and the second optical fiber part 304 will be located on both sides of the blind area caused by the breakpoint.

[0091] Optionally, in the specific implementation, after determining that the fiber sensor 30 has a breakpoint, the detection apparatus 20 can obtain a first length of the first optical fiber part 303 and a second length of the second optical fiber part 304. Then, the detection apparatus 20 can adjust the first time length (here assumed to be T1) for providing the measurement light carrier for the first optical fiber part 303, the second time length (here assumed to be T2) for providing the measurement light carrier for the second optical fiber part 304 and the physical quantity solving algorithm currently used by the detection apparatus 20 according to the first length and the second length, until it is determined that all the measurement points on the first optical fiber part 303 and the second optical fiber part 304 are detected.

[0092] In an alternative implementation, the first measurement period includes a plurality of pulse periods corresponding to the plurality of pulsed laser beams.

[0093] For the step of obtaining the first length and the second length by the detection device 20, the detection device 20 can obtain a first time (herein assumed as t1). Herein, the first time t1 can be a time at which the detection and collection assembly lastly collects the first measurement light signal from the first optical fiber section 303 (or from the first end 301) according to a preset sampling frequency in a first pulse period in the first measurement period. Preferably, the first pulse period can be the last pulse period in the first measurement period. Then, the detection device 20 can determine a first transmission duration (herein assumed as dt1) of the measurement light carrier corresponding to the first measurement light signal in the first optical fiber section 303 according to the first time. Herein, the first transmission duration dt1 is a duration of the transmission of the light carrier from the first end 301 to the end of the first optical fiber section 303 near the breakpoint. Then, the detection device 20 can determine the first length of the first optical fiber section 303 according to the first transmission duration dt1. Then, the detection device 20 can determine the second length of the second optical fiber section 304 according to the first length and the total length L0 of the optical fiber of the optical fiber sensor 30.

[0094] For example, after obtaining the first time t1, the detection device 20 can calculate a second transmission duration (herein assumed as dt2) according to the first time t1 and a start time (herein assumed as ts1) of the first pulse period. For example, the detection device 20 can determine the second transmission duration dt2 as a difference between the time t1 and the time ts1. Then, the detection device 20 can calculate the first transmission duration dt1 of the measurement light carrier in the first optical fiber section 303 according to the second transmission duration dt2, a third transmission duration (herein assumed as dt3) of the transmission of the measurement light carrier corresponding to the first measurement light signal from the light source to the first end 301, and a fourth transmission duration (herein assumed as dt4) of the transmission of the first measurement light signal from the first end 301 to the detection and collection assembly. For example, the first transmission duration dt1, the second transmission duration dt2, the third transmission duration dt3, and the fourth transmission duration dt4 can satisfy the following formula: dt1 = dt2 - dt3 - dt4.

[0095] For example, for the step of determining the first length of the first optical fiber section 303 according to the first transmission duration dt1, the detection device 20 can determine the first length of the first optical fiber section 303 as a product of the first transmission duration dt1 and the speed of light.

[0096] For example, for the step of determining the second length of the second fiber section 304 according to the first length and the total length L0 of the fiber sensor 30, the detection device 20 can determine the difference between the total length L0 of the fiber sensor 30 and the first length as the second length of the second fiber section 304.

[0097] The following will describe the specific process of the detection device 20 adjusting the first length of time for providing the measurement optical carrier to the first fiber section 303, the second length of time for providing the measurement optical carrier to the second fiber section 304, and the physical quantity solving algorithm according to the first length and the second length, until it is determined that all the measurement points on the first fiber section 303 and the second fiber section 304 are detected. It should be noted that each measurement result obtained in each measurement cycle further includes the corresponding physical space of each measurement point, or in other words, the corresponding relationship between the measurement point and one or more physical spaces to be measured corresponding to the fiber sensor 30 is included in each measurement result. For example, the above-mentioned first measurement result further includes at least one first physical space corresponding to at least one first measurement point.

[0098] In an optional implementation, after obtaining the first length and the second length, the detection device 20 can first determine a first value (herein assumed to be x1) corresponding to the first length of time for transmitting the measurement optical carrier to the first fiber section 303.

[0099] For example, assuming that the detection device 20 is implemented in a manner that the measurement optical carrier is provided to the first fiber section 303 and the second fiber section 304 respectively in each pulse period within a certain measurement cycle, the detection device 20 can determine the above-mentioned second transmission time dt2 as the above-mentioned first value x1. Alternatively, assuming that the detection device 20 is implemented in a manner that the measurement optical carrier is provided to the first fiber section 303 in a first part of pulse periods within a certain measurement cycle, and the measurement optical carrier is provided to the second fiber section 304 in a second part of pulse periods other than the first part of pulse periods within the certain measurement cycle, the detection device 20 can determine the number of pulse periods contained in the first part of pulse periods as the above-mentioned first value x1.

[0100] Further, the detection device 20 can further determine a second value (herein assumed to be x2) corresponding to the second length of time for transmitting the measurement optical carrier to the second fiber section 304 according to the second length. Herein, the process of determining the second value x2 according to the second length by the detection device is similar to the process of determining the first value x1 according to the first length described above, and thus will not be described herein again for brevity.

[0101] Further, the detection device 20 can determine a first blind area range corresponding to the first measurement cycle of the fiber sensor 30 according to the above-mentioned first length and the above-mentioned second length.

[0102] For example, the detection device 20 can determine the difference between the total length L0 of the optical fiber sensor 30 and the sum of the first length and the second length as the length of the first blind zone range. Then, the detection device 20 can determine the position of the end of the first blind zone range close to the first end 301 according to the first length and the first end 301, and determine the position of the end of the first blind zone range close to the second end 302 according to the second length and the second end 302. Thus, the detection device 20 determines the length and position of the first blind zone range.

[0103] Further, the detection device 20 can determine whether the first time length T1, the second time length T2, and the currently used physical quantity calculation algorithm meet the working state of the optical fiber sensor 30 according to the first value x1, the second value x2, the first blind zone range, and the correspondence between the at least one first measurement point and the at least one first physical space.

[0104] For example, the detection device 20 can determine whether the first value x1 is the same as the initial set value of the first length. The detection device 20 can also determine whether the second value x2 is the same as the initial set value of the second length. The detection device 20 can also determine whether the first blind zone range is the same as the initial blind zone range in the currently used physical quantity calculation algorithm. The detection device 20 can also determine whether the correspondence between the at least one first measurement point and the at least one first physical space is included in the currently used physical quantity calculation algorithm. If the detection device 20 determines that all the above are yes, it can determine whether the first time length T1, the second time length T2, and the currently used physical quantity calculation algorithm meet the working state of the optical fiber sensor 30. In this case, the detection device 20 can wait for a new measurement period to come and perform the above judgment again to determine whether the optical fiber sensor 30 has a new breakpoint.

[0105] If the detection device 20 determines that at least one of the above-mentioned items is no, it can be determined that the first time length T1, the second time length T2, and the physical quantity calculation algorithm currently used do not meet the working state of the optical fiber sensor 30. Further, if the detection device 20 determines that at least one of the first time length T1, the second time length T2, and the physical quantity calculation algorithm currently used does not meet the working state of the optical fiber sensor 30, the first time length T1 can be updated by the first value x1 to obtain an updated first time length T1. Here, the value of the updated first time length is the first value x1. The detection device 20 can also update the second time length T2 by the second value x2 to obtain an updated second time length T2. Here, the value of the updated second time length T2 is x2. The detection device 20 can also update the physical quantity calculation algorithm currently used by the first blind area range, the first number of measurement points A1, and the correspondence between the at least one first measurement point and the at least one first physical space to obtain an updated first physical quantity calculation algorithm. Here, the updated first physical quantity calculation algorithm includes the first blind area range, the first number of measurement points A1, and the correspondence between the at least one first measurement point and the at least one first physical space.

[0106] Further, in a new measurement period, the detection device 20 can use the updated first time length T1, the updated second time length T2, and the first physical quantity calculation algorithm to detect the first optical fiber portion 303 and the second optical fiber portion 304 again to obtain a new measurement result corresponding to the new measurement period, and adjust the updated first time length T1, the updated second time length T2, and the first physical quantity calculation algorithm according to the new measurement result until the detection device 20 determines that all measurement points on the first optical fiber portion 303 and the second optical fiber portion 304 are detected.

[0107] Specifically, in the second detection period, the detection device 20 will provide measurement light carriers to the first optical fiber portion 303 and the second optical fiber portion 304 according to the updated first time length T1 and the updated second time length T2, respectively, and obtain a second measurement result corresponding to the second measurement period of the optical fiber sensor 30. The second measurement result includes at least one second measurement point detected from the first optical fiber portion 303 in the second measurement period and at least one second physical space corresponding to the at least one second measurement point. At the same time, the second measurement result also includes at least one third measurement point detected from the second optical fiber portion 304 in the second measurement period and at least one third physical space corresponding to the at least one third measurement point.

[0108] Further, the detection device 20 can determine whether the fiber sensor 30 has a breakage again according to the second measurement result. Specifically, the detection device 20 can first calculate the sum A2+A3 of the second measurement point number A2 corresponding to the at least one second measurement point and the third measurement point number A3 corresponding to the at least one third measurement point. Further, if the detection device 20 determines that A2+A3 is less than the first preset number N1, it can be determined that the fiber sensor 30 has a breakage. If the detection device 20 determines that A2+A3 is equal to or greater than the first preset number N1, it can be determined that the fiber sensor 30 does not have a breakage.

[0109] Further, if the detection device 20 determines that the fiber sensor 30 has a breakage according to the second measurement result, it can again obtain the third length of the first fiber part 303 and the fourth length of the second fiber part 304 of the fiber sensor.

[0110] For example, the detection device 20 can obtain a second time (here assumed to be t2) and a third time (here assumed to be t3). The second time is the time when the detection and collection assembly last collected the first measurement light signal from the first end 301 in the second pulse period in the second measurement period. The third time is the time when the detection and collection assembly last collected the second measurement light signal from the second end 302 in the third pulse period in the second measurement period. Here, the second pulse period and the third pulse period can be the same pulse period, or they can be different pulse periods, which is not limited in the present application.

[0111] Then, the detection device 20 can determine the fifth transmission time length (here assumed to be dt5) of the measurement light carrier corresponding to the first measurement light signal in the first fiber part according to the second time t2, and determine the third length of the first fiber part according to the fifth transmission time length dt5.

[0112] Exemplarily, after obtaining the second time t2, the detection device 20 can first calculate a seventh transmission duration (herein assumed as dt7) according to the second time t2 and a starting time (herein assumed as ts2) of the second pulse period. For example, the detection device 20 can determine a difference between the time ts2 and the time t2 as the seventh transmission duration dt7. Then, the detection device 20 can calculate a fifth transmission duration dt5 of the measurement light carrier in the first optical fiber part 303 according to the seventh transmission duration dt7, a third transmission duration dt3 of the measurement light carrier corresponding to the first measurement light signal transmitted from the light source to the first end 301, and a fourth transmission duration dt4 of the first measurement light signal transmitted from the first end 301 to the probe collection assembly. For example, the eighth transmission duration dt5, the second transmission duration dt7, the third transmission duration dt3, and the fourth transmission duration dt4 can satisfy the following formula: dt5 = dt7-dt3-dt4. Then, the detection device 20 can determine a product of the fifth transmission duration dt5 and the speed of light as the third length of the first optical fiber part 303.

[0113] Then, the detection device 20 can determine a sixth transmission duration (herein assumed as dt6) of the measurement light carrier in the second optical fiber part 304 according to the third time, and determine a fourth length of the second optical fiber part 304 according to the sixth transmission duration dt6.

[0114] Exemplarily, after obtaining the third time t3, the detection device 20 can first calculate an eighth transmission duration (herein assumed as dt8) according to the third time t3 and a starting time (herein assumed as ts3) of the third pulse period. For example, the detection device 20 can determine a difference between the time ts3 and the time t3 as the eighth transmission duration dt8. Then, the detection device 20 can calculate the sixth transmission duration dt6 of the measurement light carrier in the second optical fiber part 304 according to the eighth transmission duration dt8, a ninth transmission duration dt9 of the measurement light carrier corresponding to the second measurement light signal transmitted from the light source to the second end 302, and a tenth transmission duration dt10 of the second measurement light signal transmitted from the second end 302 to the probe collection assembly. For example, the eighth transmission duration dt5, the ninth transmission duration dt9, the tenth transmission duration dt10, and the sixth transmission duration dt6 can satisfy the following formula: dt6 = dt8-dt9-dt10. Then, the detection device 20 can determine a product of the sixth transmission duration dt6 and the speed of light as the fourth length of the second optical fiber part 304.

[0115] Further, the detection apparatus 20 can determine a third value (herein assumed as x3) corresponding to the first time length T1 according to the third length, and determine a fourth value (herein assumed as x4) corresponding to the second time length T2 according to the fourth length. Herein, the detection apparatus 20 can determine the third value x3 according to the third length, which can refer to the process of determining the first value x1 according to the first length, and thus will not be repeated here. Similarly, the detection apparatus 20 can determine the fourth value x4 according to the fourth length, which can refer to the process of determining the second value x2 according to the second length, and thus will not be repeated here.

[0116] Further, the detection apparatus 20 can determine a second blind area range corresponding to the fiber sensor 30 in the second measurement period according to the third length and the fourth length. Herein, the detection apparatus 20 can determine the second blind area range corresponding to the fiber sensor 30 in the second measurement period according to the third length and the fourth length, which can refer to the process of determining the first blind area range corresponding to the fiber sensor 30 in the first measurement period according to the first length and the second length, and thus will not be repeated here.

[0117] Further, the detection apparatus 20 can determine whether the updated first time length T1, the updated second time length T2, and the first physical quantity calculation algorithm satisfy the working state of the fiber sensor 30 according to the third value x3, the fourth value x4, the second blind area range, the correspondence between the at least one second measurement point and the at least one second physical space, and the correspondence between the at least one third measurement point and the at least one third physical space.

[0118] For example, if the detection apparatus 20 determines that at least one of the third value x3 is not equal to the first value x1, the fourth value x4 is not equal to the second value x2, the second blind area range is not the same as the first blind area range, the correspondence between the at least one first measurement point and the at least one first physical space does not include the correspondence between the at least one second measurement point and the at least one second physical space, and the correspondence between the at least one third measurement point and the at least one third physical space, the detection apparatus 20 determines that at least one of the updated first time length T1, the updated second time length T2, and the first physical quantity calculation algorithm does not satisfy the working state of the fiber sensor 30.

[0119] If the detection apparatus 20 determines that the third value x3 is equal to the first value x1, the fourth value x4 is equal to the second value x2, the second blind area range is the same as the first blind area range, the correspondence between the at least one first measurement point and the at least one first physical space includes the correspondence between the at least one second measurement point and the at least one second physical space, and the correspondence between the at least one third measurement point and the at least one third physical space, the detection apparatus 20 determines that the updated first time length T1, the updated second time length T2, and the first physical quantity calculation algorithm satisfy the working state of the fiber sensor 30.

[0120] Further, in an aspect, if the detection device 20 determines that the updated first time length, the updated second time length, and the first physical quantity calculation algorithm satisfy the working state of the optical fiber sensor 30, it can be determined that all the measurement points on the first optical fiber part 303 and the second optical fiber part 304 are detected.

[0121] Optionally, the second measurement result further includes at least one second measurement data corresponding to the at least one second measurement point and at least one third measurement data corresponding to the at least one third measurement point. After determining that all the measurement points on the first optical fiber part 303 and the second optical fiber part 304 are detected, the detection device 20 can further output the at least one first measurement data corresponding to the at least one second measurement point and the at least one second measurement data corresponding to the at least one third measurement point to other devices other than the detection device 20.

[0122] Optionally, after determining that all the measurement points on the first optical fiber part 303 and the second optical fiber part 304 are detected, the detection device 20 can further determine whether the breakpoint on the optical fiber sensor 30 is one or more. Specifically, if the detection device 20 determines that the sum of the second measurement point number A2 corresponding to the at least one second measurement point and the third measurement point number A3 corresponding to the at least one third measurement point is less than the second preset number N2, it can be determined that there are at least two breakpoints in the optical fiber sensor. If it determines that the sum of the second measurement point number A2 and the third measurement point number A3 is equal to the second preset number N2, it can be determined that there is one breakpoint in the optical fiber sensor.

[0123] Optionally, the second preset number is determined according to the rated measurement point number of the optical fiber sensor, the unit blind area length of the optical fiber sensor, and the total fiber length of the optical fiber sensor.

[0124] For example, the second preset number N2 satisfies the following formula:

[0125]

[0126] Wherein, N0 is the rated measurement point number of the optical fiber sensor, S is the unit blind area length of the optical fiber sensor, and L0 is the total fiber length of the optical fiber sensor.

[0127] In another aspect, if the detection device 20 determines that the updated first time length, the updated second time length, and the first physical quantity calculation algorithm do not satisfy the working state of the optical fiber sensor 30, the first time length T1 can be updated by a third value x3 to obtain a second updated first time length T1, the second time length T2 can be updated by a fourth value x4 to obtain a second updated second time length T2, and the first physical quantity calculation algorithm can be updated by the second blind area range, the second number of measurement points A2, the third number of measurement points A3, the correspondence between the at least one second measurement point and the at least one second physical space, and the correspondence between the at least one third measurement point and the at least one third physical space to obtain a second physical quantity calculation algorithm. Here, the value of the second updated first time length T1 is the third value x3. The value of the second updated second time length T2 is x4. The second updated second physical quantity calculation algorithm includes the second blind area range, the second number of measurement points A2, the third number of measurement points A3, the correspondence between the at least one second measurement point and the at least one second physical space, and the correspondence between the at least one third measurement point and the at least one third physical space.

[0128] Further, in a new measurement period, the detection device 20 can use the second updated first time length T1, the second updated second time length T2, and the second physical quantity calculation algorithm to detect the first optical fiber portion 303 and the second optical fiber portion 304 again to obtain a new measurement result corresponding to the new measurement period, and adjust the second updated first time length T1, the second updated second time length T2, and the second physical quantity calculation algorithm according to the new measurement result until the detection device 20 determines that all the measurement points on the first optical fiber portion 303 and the second optical fiber portion 304 are detected. The specific process is similar to the process described above, that is, the detection device 20 uses the updated first time length T1, the updated second time length T2, and the first physical quantity calculation algorithm to detect the first optical fiber portion 303 and the second optical fiber portion 304 again to obtain a new measurement result corresponding to the new measurement period, and adjusts the updated first time length T1, the updated second time length T2, and the first physical quantity calculation algorithm according to the new measurement result until the detection device 20 determines that all the measurement points on the first optical fiber portion 303 and the second optical fiber portion 304 are detected, and thus the details are not repeated here.

[0129] In the detection method provided in the present application, if the detection device 20 determines that the optical fiber sensor 30 has a breakpoint, the detection device 20 provides the first optical fiber part 303 and the second optical fiber part 304 located on both sides of the breakpoint with corresponding measurement light carriers respectively, so that the measurement points on the first optical fiber part 303 and the second optical fiber part 304 can be detected. In this way, even if the optical fiber sensor 30 has a breakpoint due to a fault, the measurement points on the optical fiber sensor 30 that are not affected by the breakpoint can still have the measurement light carriers passing through, so that these measurement points that are not affected by the breakpoint can still normally feedback the measurement light signals. Therefore, the optical fiber sensor 30 can still continue to complete the measurement of the physical quantity, effectively improving the safety and reliability of the optical fiber sensor 30. Using the detection method in the vehicle-mounted environment can overcome the problem that the existing optical fiber sensor has poor reliability and safety in the vehicle-mounted environment.

[0130] Embodiment Two

[0131] The present application also provides a detection device 20 suitable for the above-mentioned detection method. Please refer to Figure 4 , Figure 4 is a structural schematic diagram of a detection device provided in the present application. As shown in Figure 4 , the detection device 20 can include a light source 201, a circulator 202, a light switch 203, and a detection control component 204. The detection control component 204 is connected to the light source 201, the circulator 202, and the light switch 203 respectively. The light source 201 is connected to the light switch 203 through the circulator 202, and the light switch 203 is connected to the first end 301 and the second end 302 of the optical fiber sensor 30. Among them, the first end 301 is located on the first optical fiber part 303, and the second end 302 is located on the second optical fiber part 304. Here, the optical fiber sensor 30 is provided with a plurality of measurement points, which are assumed to be six measurement points, namely Figure 4 measurement point 1 to measurement point 6 shown in the above-mentioned embodiment. Here, for the specific description of the measurement points, please refer to the corresponding description in Embodiment One, which will not be repeated here.

[0132] In some possible implementation manners, the detection control component 204 can be used to determine whether there is a breakpoint on the optical fiber sensor 30. If the detection control component 204 determines that there is a breakpoint on the optical fiber sensor 30, the light switch 203 can provide the first optical fiber part 303 and the second optical fiber part 304 of the optical fiber sensor 30 with the measurement light carrier generated by the light source 201 respectively, so that the measurement points on the first optical fiber part 303 and the second optical fiber part 304 can be detected. Here, for the related description of the first optical fiber part 303, the second optical fiber part 304, and the breakpoint, please refer to the description of the first optical fiber part 303, the second optical fiber part 304, and the breakpoint in Embodiment One, which will not be repeated here.

[0133] In the above implementation, if the detection control component 204 determines that the fiber sensor 30 has a break, the optical switch 203 can provide the first fiber section 303 and the second fiber section 304 located on two sides of the break with corresponding measurement light carriers respectively, so that the measurement points on the first fiber section 303 and the second fiber section 304 can all be detected. In this way, even if the fiber sensor 30 has a break due to a fault, the measurement points on the fiber sensor 30 that are not affected by the break can still have the measurement light carriers passing through, so that these measurement points not affected by the break can still normally feedback the measurement light signals. Therefore, the fiber sensor 30 can still continue to complete the measurement of the physical quantity, effectively improving the safety and reliability of the fiber sensor 30. Using the detection method in a vehicle environment can overcome the problem that the existing fiber sensor has poor reliability and safety in a vehicle environment.

[0134] In some possible implementation manners, if the detection control component 204 determines that the fiber sensor 30 does not have a break, the optical switch 203 can provide the fiber sensor 30 with the measurement light carrier from the first end 301 or the second end 302 in each measurement period, and obtain the corresponding measurement result. Until a new judgment opportunity arrives, the operation of determining whether the fiber sensor 30 has a break is performed again.

[0135] In some possible implementation manners, the detection control component 204 can be specifically configured to: obtain a first length of the first fiber section 303 and a second length of the second fiber section 304. Adjust the first time length T1 for providing the measurement light carrier for the first fiber section 303, the second time length T2 for providing the measurement light carrier for the second fiber section 304, and the physical quantity calculation algorithm according to the first length and the second length, so that all the measurement points on the first fiber section 303 and the second fiber section 304 can be detected.

[0136] In some possible implementation manners, under the control of the detection control component 204, the optical switch 203 can be configured to establish the connection between the circulator 202 and the first end 301 or the second end 302, to provide the first fiber section 303 or the second fiber section 304 with the measurement light carrier output by the circulator 202 respectively, and provide the measurement light signal output by the first fiber section 303 or the second fiber section 304 to the circulator 202 respectively.

[0137] Further, the circulator 202 is configured to transmit the measurement light carrier generated by the light source 201 to the optical switch 203. The circulator 202 is also configured to transmit the measurement light carrier generated by the light source 201 to the optical switch 203. The detection control component 204 is configured to control the optical switch 203 to establish a connection between the circulator 202 and the first end 301 or the second end 302, so as to provide the measurement light carrier to the first fiber section 303 or the second fiber section 304, respectively. Further, the circulator 202 is also configured to transmit the measurement light signal (the first measurement light signal or the second measurement light signal) from the optical switch 203 to the detection control component 204. The detection control component 204 is also configured to generate a measurement result corresponding to any measurement period based on the measurement light signal received from the circulator 202 in the any measurement period. It should be understood that the measurement result corresponding to the any measurement period includes at least one measurement point that can be detected by the detection control component 204 from the fiber sensor 30 in the any measurement period, and measurement data corresponding to each measurement point in the at least one measurement point. Here, the specific process of determining the measurement result corresponding to each measurement period based on the obtained measurement light signal by the detection control component 204 can be referred to the corresponding description in the foregoing embodiment one, and will not be described herein again.

[0138] Further, the detection control component 204 is also configured to determine whether the fiber sensor 30 has a breakpoint based on the measurement result corresponding to any measurement period.

[0139] Further, the detection control component 204 is also configured to, in a case where it is determined that the fiber sensor 30 has a breakpoint based on the measurement result corresponding to any measurement period, acquire a first length of the first fiber section 303 and a second length of the second fiber section 304, and adjust the first time length T1 at which the measurement light carrier is provided to the first fiber section 303, the second time length T2 at which the measurement light carrier is provided to the second fiber section 302, and the physical quantity solving algorithm based on the first length and the second length, until it is determined that all the measurement points on the first fiber section 303 and the second fiber section 304 are detected.

[0140] In some possible implementation manners, referring to Figure 5 , Figure 5 is another structural schematic diagram of a detection device provided by the present application. As Figure 5As shown, the detection control component 204 can include a probe acquisition component 2041, a signal processor 2042 and a controller 2043. The probe acquisition component 2041 is connected with the circulator 202, and is further connected with the controller 2043 through the signal processor 2042. The controller 2043 is further connected with the optical switch 203. It should be noted that, in actual implementation, the controller 2043 can be included in the detection device 20, or can exist independently of the detection device 20. For example, the controller 2043 can be a controller used by another device other than the detection device 20, or can be a relatively independent control component or control unit, and the present application does not limit this.

[0141] In actual work, the probe acquisition component 2041 is configured to generate one or more acquisition results corresponding to any measurement period based on the measurement optical signals received from the circulator 202 in any measurement period. Each acquisition result can include a plurality of measurement electrical signals corresponding to a plurality of measurement points acquired by the probe acquisition component in a pulse period. Taking the measurement points 1 to 6 as an example, in the case where the fiber sensor 30 does not have a break point, one acquisition result includes six measurement electrical signals corresponding to the six measurement points.

[0142] The signal processor 2042 is configured to solve one or more acquisition results corresponding to any measurement period based on a physical quantity solving algorithm to obtain one or more probe results corresponding to the measurement period. Further, the signal processor 2042 is further configured to process the one or more probe results corresponding to the measurement period to obtain a measurement result corresponding to the measurement period. For example, the signal processor 2042 can determine the average of the one or more probe results as a measurement result. Taking the first measurement period as an example, in actual implementation, the probe acquisition component can acquire a plurality of acquisition results in the first measurement period and send them to the signal processor 2042. The signal processor 2042 can process the plurality of acquisition results by the physical quantity solving algorithm to obtain a plurality of probe results, and further process the first measurement result corresponding to the first measurement period based on the plurality of probe results. Here, the description of the physical quantity solving algorithm can be referred to the foregoing, and will not be repeated here.

[0143] Further, the controller 2043 can be configured to determine whether the fiber sensor 30 has a break point according to the measurement result corresponding to any measurement period. If the controller 2043 determines that the fiber sensor 30 does not have a break point, the optical switch 203 can be controlled to provide measurement optical carriers for the fiber sensor 30 only from the first end 301 or the second end 302 in each measurement period, and the corresponding measurement result is acquired. Until the new judgment opportunity comes, the operation of judging whether the fiber sensor 30 has a break point is performed again.

[0144] If the controller 2043 determines that the fiber sensor 30 has a break, the first length of the first fiber portion 303 and the second length of the second fiber portion 304 can be obtained, and the first length and the second length are used to adjust the first time length T1 for the first fiber portion 303 to provide the measurement optical carrier, the second time length T2 for the second fiber portion 304 to provide the measurement optical carrier, and the physical quantity solving algorithm, until it is determined that all the measurement points on the first fiber portion 303 and the second fiber portion 304 are detected.

[0145] In some possible implementation manners, the signal processor 2042 can be configured to obtain a first measurement result of the fiber sensor 30 in a first measurement period. Here, the first measurement result can include at least one first measurement point detected from the fiber sensor 30 in the first measurement period, and at least one first physical space corresponding to the at least one first measurement point. Further, the first measurement result can also include at least one third measurement data corresponding to the at least one first measurement point.

[0146] The controller 2043 can be configured to determine that the fiber sensor 30 has a break if it is determined that the number of the above-mentioned at least one first measurement point A1 is less than a first preset number N1. The controller 2043 is also configured to determine that the fiber sensor 30 has a break if it is determined that the number of the above-mentioned first measurement point A1 is equal to or greater than the first preset number N1.

[0147] Optionally, the first preset number is determined according to a rated number of measurement points of the fiber sensor 30, a unit blind area length of the fiber sensor 30, and a total fiber length of the fiber sensor 30.

[0148] For example, the above-mentioned first preset number N1 can satisfy the following formula:

[0149]

[0150] Wherein, N0 is the rated number of measurement points of the fiber sensor 30. In combination with the foregoing example, the value of N0 can be 6. S is the unit blind area length of the fiber sensor. It should be noted that in actual implementation, due to the structure of the fiber sensor 30, some fiber regions on the fiber sensor 30 cannot be equipped with measurement points, and these fiber regions are usually referred to as blind areas. In the case where the fiber sensor 30 does not have a break, there will be two blind areas near the first end 301 and the second end 302, and the lengths of the two blind areas are fixed, that is, the unit blind area length. L0 is the total fiber length of the fiber sensor 30, or in other words, L0 is the length of the fiber portion of the fiber sensor 30.

[0151] In some possible implementation manners, the controller 2043 can also be configured to obtain a first time point (herein assumed as t1). The first time point is a time point at which the detection and collection component 2041 last collects the first measurement optical signal from the first optical fiber section 303 (or from the first end 301) in a first pulse period in the first measurement period. Preferably, the first pulse period can be the last pulse period in the first measurement period.

[0152] Further, the controller 2043 can also be configured to determine, according to the first time point t1, a first transmission duration (herein assumed as dt1) of the measurement optical carrier corresponding to the first measurement optical signal in the first optical fiber section 303.

[0153] For example, after obtaining the first time point t1, the controller 2043 can first calculate a second transmission duration (herein assumed as dt2) according to the first time point t1 and a start time point (herein assumed as ts1) of the first pulse period. For example, the controller 2043 can determine the difference between the time point ts1 and the time point t1 as the second transmission duration dt2. Then, the controller 2043 can calculate the first transmission duration dt1 of the measurement optical carrier in the first optical fiber section 303 according to the second transmission duration dt2, a third transmission duration (herein assumed as dt3) of the measurement optical carrier corresponding to the first measurement optical signal from the light source to the first end 301, and a fourth transmission duration (herein assumed as dt4) of the first measurement optical signal from the first end 301 to the detection and collection component. For example, the first transmission duration dt1, the second transmission duration dt2, the third transmission duration dt3, and the fourth transmission duration dt4 can satisfy the following formula: dt1 = dt2-dt3-dt4.

[0154] Further, the controller 2043 can determine the first length of the first optical fiber section according to the first transmission duration dt1. Details can be referred to the corresponding description in the first embodiment, which will not be repeated here.

[0155] Further, the controller 2043 can determine the second length of the second optical fiber section 304 according to the first length and the total length L0 of the optical fiber of the optical fiber sensor 30. Details can be referred to the corresponding description in the first embodiment, which will not be repeated here.

[0156] In some possible implementation manners, the controller 2043 can also be configured to determine, according to the first length, a first value (herein assumed as x1) corresponding to a first time duration T1 of emitting the measurement optical carrier to the first optical fiber section 303. Details can be referred to the corresponding description in the first embodiment, which will not be repeated here.

[0157] The controller 2043 is further configured to determine a second value (herein assumed as x2) corresponding to the second time length T2 of emitting the measurement optical carrier to the second optical fiber section 304 according to the second length. The specific process can be referred to the corresponding description in Embodiment One, which will not be repeated here.

[0158] The controller 2043 is further configured to determine a first blind area range of the optical fiber sensor 30 in the first measurement period according to the first length and the second length. The specific process can be referred to the corresponding description in Embodiment One, which will not be repeated here.

[0159] The controller 2043 is further configured to determine whether the first time length T1, the second time length T2, and the physical quantity calculation algorithm satisfy the working state of the optical fiber sensor 30 according to the first value x1, the second value x2, the first blind area range, and the correspondence between the at least one first measurement point and the at least one first physical space.

[0160] For example, the controller 2043 can determine whether the first value x1 is the same as the initial setting value of the first length. The detection device 20 can also determine whether the second value x2 is the same as the initial setting value of the second length. The detection device 20 can further determine whether the first blind area range is the same as the initial blind area range in the physical quantity calculation algorithm currently used. The detection device 20 can further determine whether the correspondence between the at least one first measurement point and the at least one first physical space is included in the physical quantity calculation algorithm currently used. If the detection device 20 determines that the above several items are all yes, it can be determined whether the first time length T1, the second time length T2, and the physical quantity calculation algorithm currently used satisfy the working state of the optical fiber sensor 30. In this case, the detection device 20 can wait for a new measurement period to come and execute the judgment of whether the optical fiber sensor 30 has a new breakpoint again.

[0161] If the controller 2043 determines that at least one of the above conditions is false, it can be determined that the first time length T1, the second time length T2, and the current physical quantity calculation algorithm do not meet the working state of the optical fiber sensor 30. Further, if the controller 2043 determines that at least one of the first time length T1, the second time length T2, and the current physical quantity calculation algorithm does not meet the working state of the optical fiber sensor 30, the first time length T1 can be updated by the first value x1 to obtain an updated first time length T1. Here, the value of the updated first time length is the first value x1. The controller 2043 can also update the second time length T2 by the second value x2 to obtain an updated second time length T2. Here, the value of the updated second time length T2 is x2. The controller 2043 can also update the current physical quantity calculation algorithm by the first blind area range, the first number of measurement points A1, and the correspondence between the at least one first measurement point and the at least one first physical space to obtain an updated first physical quantity calculation algorithm. Here, the updated first physical quantity calculation algorithm includes the first blind area range, the first number of measurement points A1, and the correspondence between the at least one first measurement point and the at least one first physical space. It should be noted that in the embodiments of the present application, the signal processor 2042 mainly uses the physical quantity calculation algorithm to obtain the detection results, and further processes to obtain the measurement results, so the update of the physical quantity calculation algorithm can be specifically that the controller 2043 sends an update instruction to the signal processor 2042 to control the signal processor 2042 to complete the update of the physical quantity calculation algorithm.

[0162] Further, in the new measurement period, the controller 2043 can use the updated first time length T1, the updated second time length T2, and the first physical quantity calculation algorithm to detect the first optical fiber part 303 and the second optical fiber part 304 again to obtain new measurement results corresponding to the new measurement period, and adjust the updated first time length T1, the updated second time length T2, and the first physical quantity calculation algorithm according to the new measurement results until the controller 2043 determines that all the measurement points on the first optical fiber part 303 and the second optical fiber part 304 are detected.

[0163] For example, the controller 2043 can control the optical switch 203 to establish the connection between the circulator 202 and the first end 301 for the updated first time duration T1 in the second measurement period, so as to provide the optical carrier to the first fiber section 303 for the updated first time duration T1. Then, the controller 2043 can also control the optical switch 203 to establish the connection between the circulator 202 and the second end 302 for the updated second time duration T2 in the second measurement period, so as to provide the optical carrier to the second fiber section 304 for the updated second time duration T2. The controller 2043 can detect the first fiber section 303 and the second fiber section 304 again in the second measurement period until all the measurement points on the first fiber section 303 and the second fiber section 304 are detected.

[0164] Optionally, the controller 2043 can be configured to acquire the second measurement result of the fiber sensor 30 in the second measurement period by the detection acquisition assembly 2041 and the signal processor 2042. The second measurement result includes at least one second measurement point detected from the first fiber section 303 in the second measurement period and at least one second physical space corresponding to the at least one second measurement point, and the second measurement result also includes at least one third measurement point detected from the second fiber section 304 in the second measurement period and at least one third physical space corresponding to the at least one third measurement point.

[0165] Further, the controller 2043 can determine whether the fiber sensor 30 has a break point according to the second measurement result. Specifically, the controller 2043 can calculate the sum A2+A3 of the number A2 of the at least one second measurement point and the number A3 of the at least one third measurement point. Further, if the controller 2043 determines that A2+A3 is less than the first preset number N1, it can be determined that the fiber sensor 30 has a break point. If the controller 2043 determines that A2+A3 is equal to or greater than the first preset number N1, it can be determined that the fiber sensor 30 does not have a break point.

[0166] Further, the controller 2043 can also be configured to acquire the third length of the first fiber section 303 and the fourth length of the second fiber section 304 of the fiber sensor 30 if it is determined that the fiber sensor 30 has a break point according to the second measurement result.

[0167] For example, the controller 2043 can obtain a second time (herein assumed to be t2) and a third time (herein assumed to be t3). The second time is a time at which the detection and collection assembly last collects the first measurement light signal from the first end 301 in a second pulse period in the second measurement period. The third time is a time at which the detection and collection assembly last collects the second measurement light signal from the second end 302 in a third pulse period in the second measurement period. Herein, the second pulse period and the third pulse period can be the same pulse period or different pulse periods, and the application does not make a specific limitation in this regard. Then, the controller 2043 can determine a fifth transmission time length (herein assumed to be dt5) of the measurement light carrier corresponding to the first measurement light signal in the first fiber portion according to the second time t2, and determine the third length of the first fiber portion according to the fifth transmission time length dt5. The specific process can be referred to the corresponding description in the foregoing embodiment one, and thus will not be described here again. Then, the controller 2043 can determine a sixth transmission time length (herein assumed to be dt6) of the measurement light carrier corresponding to the second measurement light signal in the second fiber portion 304 according to the third time, and determine the fourth length of the second fiber portion 304 according to the sixth transmission time length dt6. The specific process can be referred to the corresponding description in the foregoing embodiment one, and thus will not be described here again.

[0168] Further, the controller 2043 can be configured to determine a third value (herein assumed to be x3) corresponding to the first time length T1 according to the third length. The specific process can be referred to the corresponding description in the foregoing embodiment one, and thus will not be described here again.

[0169] Further, the controller 2043 can be configured to determine a fourth value (herein assumed to be x4) corresponding to the second time length T2 according to the fourth length. The specific process can be referred to the corresponding description in the foregoing embodiment one, and thus will not be described here again.

[0170] Further, the controller 2043 can determine a second blind area range corresponding to the fiber sensor 30 in the second measurement period according to the third length and the fourth length. Herein, the specific process of determining the second blind area range corresponding to the fiber sensor 30 in the second measurement period according to the third length and the fourth length by the controller 2043 can be referred to the specific process of determining the first blind area range corresponding to the fiber sensor 30 in the first measurement period according to the first length and the second length by the detection device 20 described in the foregoing embodiment one, and thus will not be described here again.

[0171] Further, the controller 2043 can determine whether the updated first time length T1, the updated second time length T2, and the first physical quantity calculation algorithm satisfy the working state of the optical fiber sensor 30 according to the third value x3, the fourth value x4, the second blind area range, the correspondence between the at least one second measurement point and the at least one second physical space, and the correspondence between the at least one third measurement point and the at least one third physical space.

[0172] For example, the controller 2043 can determine that at least one of the updated first time length T1, the updated second time length T2, and the first physical quantity calculation algorithm does not satisfy the working state of the optical fiber sensor 30 if at least one of the following conditions is met: the third value x3 is not equal to the first value x1, the fourth value x4 is not equal to the second value x2, the second blind area range is not the same as the first blind area range, the correspondence between the at least one second measurement point and the at least one second physical space is not included in the correspondence between the at least one first measurement point and the at least one first physical space, and the correspondence between the at least one third measurement point and the at least one third physical space is not included in the correspondence between the at least one first measurement point and the at least one first physical space.

[0173] If the controller 2043 determines that the third value x3 is equal to the first value x1, the fourth value x4 is equal to the second value x2, the second blind area range is the same as the first blind area range, the correspondence between the at least one second measurement point and the at least one second physical space is included in the correspondence between the at least one first measurement point and the at least one first physical space, and the correspondence between the at least one third measurement point and the at least one third physical space is included in the correspondence between the at least one first measurement point and the at least one first physical space, the controller 2043 can determine that the updated first time length T1, the updated second time length T2, and the first physical quantity calculation algorithm satisfy the working state of the optical fiber sensor 30.

[0174] Further, in an aspect, if the controller 2043 determines that the updated first time length T1, the updated second time length T2, and the first physical quantity calculation algorithm satisfy the working state of the optical fiber sensor 30, the controller 2043 can determine that all the measurement points on the first optical fiber portion 303 and the second optical fiber portion 304 are detected.

[0175] Optionally, the second measurement result further includes at least one second measurement data corresponding to the at least one second measurement point and at least one third measurement data corresponding to the at least one third measurement point. After determining that all the measurement points on the first optical fiber portion 303 and the second optical fiber portion 304 are detected, the controller 2043 can further output the at least one first measurement data corresponding to the at least one second measurement point and the at least one second measurement data corresponding to the at least one third measurement point to devices other than the detection device 20.

[0176] Optionally, after determining that all the measurement points on the first optical fiber section 303 and the second optical fiber section 304 are detected, the controller 2043 can further determine whether the breakpoint on the optical fiber sensor 30 is one or more. Specifically, if the controller 2043 determines that the sum of the second measurement point number A2 corresponding to at least one second measurement point and the third measurement point number A3 corresponding to at least one third measurement point is less than the second preset number N2, it can be determined that the optical fiber sensor 30 has at least two breakpoints. If it determines that the sum of the second measurement point number A2 and the third measurement point number A3 is equal to the second preset number N2, it can be determined that the optical fiber sensor has one breakpoint.

[0177] Optionally, the second preset number can be determined according to the rated measurement point number of the optical fiber sensor 30, the unit blind area length of the optical fiber sensor 30, and the total fiber length of the optical fiber sensor 30.

[0178] For example, the second preset number N2 satisfies the following formula:

[0179]

[0180] Wherein, N0 is the rated measurement point number of the optical fiber sensor 30, S is the unit blind area length of the optical fiber sensor 30, and L0 is the total fiber length of the optical fiber sensor 30.

[0181] In another aspect, if the controller 2043 determines that the updated first time length T1, the updated second time length T2, and the first physical quantity calculation algorithm do not meet the working state of the optical fiber sensor 30, the first time length T1 can be updated by a third value x3 to obtain a second updated first time length T1, the second time length T2 can be updated by a fourth value x4 to obtain a second updated second time length T2, and the first physical quantity calculation algorithm can be updated by the second blind area range, the second measurement point number A2, the third measurement point number A3, the correspondence between the at least one second measurement point and the at least one second physical space, and the correspondence between the at least one third measurement point and the at least one third physical space to obtain a second physical quantity calculation algorithm. Here, the value of the second updated first time length T1 is the third value x3. The value of the second updated second time length T2 is x4. The second physical quantity calculation algorithm obtained by the second update includes the second blind area range, the second measurement point number A2, the third measurement point number A3, the correspondence between the at least one second measurement point and the at least one second physical space, and the correspondence between the at least one third measurement point and the at least one third physical space.

[0182] Further, in a new measurement period (herein assumed as the third measurement period), the controller 2043 can employ the re-updated first time duration T1, the re-updated second time duration T2 and the second physical quantity solving algorithm to detect the first optical fiber section 303 and the second optical fiber section 304 again to obtain a third measurement result corresponding to the third measurement period. The controller 2043 can adjust the re-updated first time duration T1, the re-updated second time duration T2 and the second physical quantity solving algorithm according to the third measurement result until it is determined that all the measurement points on the first optical fiber section 303 and the second optical fiber section 304 are detected. The specific process is similar to the foregoing description, which will not be repeated here.

[0183] For example, in the third measurement period, the controller 2043 can control the optical switch 203 to establish the connection between the circulator 202 and the first end 301 in the re-updated first time duration T1 to provide the optical carrier to the first optical fiber section 303 in the re-updated first time duration T1. Then, in the third measurement period, the controller 2043 can also control the optical switch 203 to establish the connection between the circulator 202 and the second end 302 in the re-updated second time duration T2 to provide the optical carrier to the second optical fiber section 304 in the re-updated second time duration T2. The controller 2043 can detect the first optical fiber section 303 and the second optical fiber section 304 again in the third measurement period until it is determined that all the measurement points on the first optical fiber section 303 and the second optical fiber section 304 are detected.

[0184] The optical source 201 involved in the present application can be various types of lasers as long as it can emit pulsed laser, and the present application does not limit the specific implementation form.

[0185] The circulator 202 involved in the present application can be various types of optical devices with optical path separation function as long as it can isolate and forward the measurement optical carrier and the measurement optical signal, and the present application does not limit the specific implementation form.

[0186] The optical switch 203 involved in the present application can be a thermal modulation switch or an electrical modulation optical switch, and the present application does not limit the specific implementation form.

[0187] The probe collection assembly 2041 involved in the present application can be a functional device capable of realizing optical signal sampling and photoelectric signal conversion, such as a photodetector, and the present application does not limit the specific implementation form.

[0188] The signal processor 2042 involved in the present application can be a functional device capable of realizing electrical signal processing, such as a digital signal processor, an FPGA, etc., and the present application does not limit the specific implementation form.

[0189] The controller 2043 involved in the present application can be any form of control device capable of information processing and control signaling transceiving, and the present application does not limit the specific implementation form thereof. In particular, when the detection device 20 provided in the present application is applied in a vehicle-mounted scenario, the controller 2043 can be a vehicle-mounted controller, such as an IVC300 controller and the like.

[0190] The present application also provides an electronic device. The electronic device can include a processor, and the processor is connected with a memory. In actual implementation, the memory is used to store a computer program, and the processor is used to execute the computer program stored in the memory, so that the electronic device can execute the method shown in the present application. Figure 1

[0191] In a possible implementation manner, the detection device 20 described in the foregoing can include the electronic device.

[0192] For example, the electronic device can be a controller 2043 included in the detection device 20.

[0193] The present application also provides a vehicle. Please refer to Figure 6 , Figure 6 is a structural schematic diagram of a vehicle provided in the present application. As shown in Figure 6 , the vehicle 200 can include the detection device 20 and the optical fiber sensor 30 described in the foregoing embodiments. The vehicle 200 can realize detection of physical quantities through the detection device 20 and the optical fiber sensor 30.

[0194] It should be understood that, in actual implementation, the vehicle 200 can also include a plurality of wheels, a seat, a vehicle-mounted power supply, electrical equipment and the like.

[0195] In the present application, some devices or functional modules in the detection device 20 and between the detection device 20 and the optical fiber sensor 30 can be connected through a waveguide light. Optionally, the waveguide can be an optical fiber. For example, the optical fiber can be a special optical-electric composite cable. The optical fiber can be a single-mode optical fiber, a multi-mode optical fiber, a plastic optical fiber and the like. The present application does not limit the implementation form of the waveguide.

[0196] The terms “first”, “second”, and the like in the specification and claims of the present application and the above-described drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms “include” and “have” and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device including a series of steps is not limited to the listed steps, but can optionally include steps not listed, or can optionally include other steps inherent to the process, method, product or device.

[0197] ​Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase "in an embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive of one another. It is expressly understood that any of the embodiments described herein can be combined with any of the other embodiments unless specifically noted otherwise.

[0198] Although the application is described herein with reference to various embodiments, it will be understood that those skilled in the art, both present and future, will be able to appreciate modifications of the embodiments which will come within the scope of the application. These equivalents will fall within the spirit of the application. The word "comprising" does not exclude other components or steps not mentioned, and the word "a" or "an" does not exclude a plurality. The mere fact that different claims depend on a common basis is not a indication that a combination of measures cannot be used to advantage. The word "comprising" does not exclude other components or steps not mentioned, and the word "a" or "an" does not exclude a plurality. The mere fact that different claims depend on a common basis is not a indication that a combination of measures cannot be used to advantage.

[0199] The above detailed description of the application has been presented for the purposes of clarity and understanding, and is not intended to limit the method and core idea of the application provided by the application to the specific examples described. The above description of the embodiments is intended to help understand the method and core idea of the application; at the same time, for those skilled in the art, according to the idea of the vehicle communication system and vehicle provided by the application, there will be changes in specific implementation and application range; in view of the above, the content of the specification should not be understood as limiting the application.

[0200] The above detailed description of the application has been presented for the purposes of clarity and understanding, and is not intended to limit the method and core idea of the application to the specific examples described. The above description of the embodiments is intended to help understand the method and core idea of the application; at the same time, for those skilled in the art, according to the idea of the vehicle communication system and vehicle provided by the application, there will be changes in specific implementation and application range; in view of the above, the content of the specification should not be understood as limiting the application.

[0201] The above detailed description of the application has been presented for the purposes of clarity and understanding, and is not intended to limit the method and core idea of the application to the specific examples described. The above description of the embodiments is intended to help understand the method and core idea of the application; at the same time, for those skilled in the art, according to the idea of the vehicle communication system and vehicle provided by the application, there will be changes in specific implementation and application range; in view of the above, the content of the specification should not be understood as limiting the application.

Claims

1. A detection method, characterized in that, The method is applicable to detection devices connected to fiber optic sensors, and the method includes: It was determined that a breakpoint existed in the fiber optic sensor; Measurement optical carriers are provided to the first and second optical fiber portions of the optical fiber sensor respectively, so that measurement points on the first and second optical fiber portions are detected, wherein the first and second optical fiber portions are located on both sides of the break point.

2. The method according to claim 1, characterized in that, Providing measurement optical carriers to the first and second fiber portions of the fiber optic sensor, respectively, so that measurement points on the first and second fiber portions are detected, includes: Obtain the first length of the first optical fiber portion and the second length of the second optical fiber portion; The first duration of the measurement optical carrier provided to the first optical fiber portion and the second duration of the measurement optical carrier provided to the second optical fiber portion are adjusted according to the first length and the second length, and the physical quantity calculation algorithm is applied, so that all measurement points on the first optical fiber portion and the second optical fiber portion are detected.

3. The method according to claim 2, characterized in that, The determination that the fiber optic sensor has a breakpoint includes: Acquire a first measurement result corresponding to the fiber optic sensor within a first measurement period, wherein the first measurement result includes at least one first measurement point detected from the fiber optic sensor within the first measurement period; If it is determined that the number of first measurement points corresponding to at least one first measurement point is less than a first preset number, then it is determined that there is a breakpoint in the optical fiber sensor.

4. The method according to claim 3, characterized in that, The first preset number is determined based on the rated number of measurement points of the fiber optic sensor, the unit dead zone length of the fiber optic sensor, and the total fiber length of the fiber optic sensor.

5. The method according to claim 4, characterized in that, The first preset number satisfies the following formula: Wherein, N1 is the first preset number, N0 is the rated number of measurement points of the fiber optic sensor, S is the unit blind zone length of the fiber optic sensor, and L0 is the total fiber length of the fiber optic sensor.

6. The method according to any one of claims 3-5, characterized in that, The detection device includes a light source and a detection and acquisition component. The measurement optical carrier is a pulsed laser provided by the light source. The first measurement period includes at least a plurality of pulse periods corresponding to the pulsed laser. The first length of the first optical fiber portion is obtained in the following manner: Acquire the first moment, wherein the first moment is the moment when the detection and acquisition component last acquired the first measurement optical signal from the first optical fiber portion within the first pulse period of the first measurement period; The first transmission duration of the measurement optical carrier corresponding to the first measurement optical signal in the first optical fiber section is determined based on the first moment. The first length of the first optical fiber portion is determined based on the first transmission duration.

7. The method according to claim 6, characterized in that, The second length of the second optical fiber portion is obtained in the following manner: The second length of the second optical fiber portion is determined based on the first length and the total length of the optical fiber of the optical fiber sensor.

8. The method according to claim 6 or 7, characterized in that, The step of determining the first transmission duration of the measurement optical carrier corresponding to the first measurement optical signal in the first optical fiber section based on the first time includes: The second transmission duration is calculated based on the first moment and the start time of the first pulse period; The first transmission duration of the measurement optical carrier in the first optical fiber section is calculated based on the second transmission duration, the third transmission duration of the measurement optical carrier corresponding to the first measurement optical signal from the light source to the first end of the optical fiber sensor, and the fourth transmission duration of the first measurement optical signal from the first end of the optical fiber sensor to the detection and acquisition component, wherein the first end is located in the first optical fiber section.

9. The method according to any one of claims 6-8, characterized in that, The first measurement result also includes at least one first physical space corresponding to the at least one first measurement point; The step of adjusting the first duration of providing the measurement optical carrier to the first fiber portion, the second duration of providing the measurement optical carrier to the second fiber portion, and the physical quantity calculation algorithm according to the first length and the second length, until it is determined that all measurement points on the first fiber portion and the second fiber portion have been detected, includes: A first value corresponding to the first duration of transmitting the measurement optical carrier to the first optical fiber portion is determined based on the first length. The second value corresponding to the second duration of transmitting the measurement optical carrier to the second optical fiber section is determined based on the second length. The first blind zone range of the optical fiber sensor within the first measurement period is determined based on the first length and the second length. If, based on the first value, the second value, the first blind zone range, and the correspondence between the at least one first measurement point and the at least one first physical space, it is determined that at least one of the following—the first duration, the second duration, and the physical quantity calculation algorithm—does not meet the working state of the fiber optic sensor, then the first duration is updated using the first value to obtain an updated first duration, the second duration is updated using the second value to obtain an updated second duration, and the physical quantity calculation algorithm is updated using the first blind zone range, the number of the first measurement points, and the correspondence between the at least one first measurement point and the at least one first physical space to obtain an updated first physical quantity calculation algorithm. The first optical fiber section and the second optical fiber section are detected using the updated first duration, the updated second duration, and the first physical quantity calculation algorithm until it is determined that all measurement points on the first optical fiber section and the second optical fiber section have been detected.

10. The method according to claim 9, characterized in that, The step of using the updated first duration, the updated second duration, and the first physical quantity calculation algorithm to detect the first optical fiber section and the second optical fiber section until it is determined that all measurement points on the first optical fiber section and the second optical fiber section have been detected includes: The second measurement result corresponding to the fiber optic sensor in the second measurement period is obtained, wherein the second measurement result includes at least one second measurement point detected from the first fiber portion in the second measurement period and at least one second physical space corresponding to the at least one second measurement point, and the second measurement result also includes at least one third measurement point detected from the second fiber portion in the second measurement period and at least one third physical space corresponding to the at least one third measurement point; If it is determined from the second measurement result that there is a break in the optical fiber sensor, then the third length of the first optical fiber portion and the fourth length of the second optical fiber portion of the optical fiber sensor are obtained. The third value corresponding to the first duration is determined based on the third length; The fourth value corresponding to the second duration is determined based on the fourth length. The second blind zone range of the fiber optic sensor within the second measurement period is determined based on the third length and the fourth length. If, based on the third value, the fourth value, the second blind zone range, the correspondence between the at least one second measurement point and the at least one second physical space, and the correspondence between the at least one third measurement point and the at least one third physical space, it is determined that the updated first duration, the updated second duration, and the first physical quantity calculation algorithm all satisfy the working state of the optical fiber sensor, then it is determined that all measurement points on the first optical fiber portion and the second optical fiber portion have been detected.

11. The method according to claim 10, characterized in that, The step of obtaining the third length of the first optical fiber portion of the optical fiber sensor includes: Acquire a second moment, wherein the second moment is the moment when the detection and acquisition component last acquired the first measurement optical signal from the first end within the second pulse period of the second measurement period; The fifth transmission duration of the measurement optical carrier corresponding to the first measurement optical signal in the first optical fiber section is determined based on the second time, and the third length of the first optical fiber section is determined based on the fifth transmission duration.

12. The method according to claim 10 or 11, characterized in that, The step of obtaining the fourth length of the second optical fiber portion of the optical fiber sensor includes: The third moment is obtained, wherein the third moment is the moment when the detection and acquisition component last acquires the second measurement optical signal from the second end of the optical fiber sensor within the third pulse period of the second measurement period; The sixth transmission duration of the measurement optical carrier corresponding to the second measurement optical signal in the second optical fiber section is determined based on the third time, and the fourth length of the second optical fiber section is determined based on the sixth transmission duration.

13. The method according to any one of claims 10-12, characterized in that, The method further includes: If, based on the third value, the fourth value, the second blind zone range, the correspondence between the at least one second measurement point and the at least one second physical space, and the correspondence between the at least one third measurement point and the at least one third physical space, it is determined that at least one of the updated first duration, the updated second duration, and the first physical quantity calculation algorithm does not satisfy the working state of the fiber optic sensor, then the first duration is updated using the third value to obtain a further updated first duration, the second duration is updated using the fourth value to obtain a further updated second duration, and the first physical quantity calculation algorithm is updated using the second blind zone range, the number of second measurement points, the number of third measurement points, the correspondence between the at least one second measurement point and the at least one second physical space, and the correspondence between the at least one third measurement point and the at least one third physical space to obtain a second physical quantity calculation algorithm; The first optical fiber section and the second optical fiber section are detected again using the first time period after the second update, the second time period after the second update, and the second physical quantity calculation algorithm until it is determined that all measurement points on the first optical fiber section and the second optical fiber section have been detected.

14. The method according to any one of claims 10-13, characterized in that, The method further includes: If at least one of the following is determined: the third value is not equal to the first value; the fourth value is not equal to the second value; the second blind zone range is not the same as the first blind zone range; the correspondence between the at least one first measurement point and the at least one first physical space does not include the correspondence between the at least one second measurement point and the at least one second physical space, or the correspondence between the at least one third measurement point and the at least one third physical space, then it is determined that at least one of the updated first duration, the updated second duration, and the first physical quantity calculation algorithm currently used by the detection device does not satisfy the working state of the fiber optic sensor.

15. The method according to any one of claims 10-14, characterized in that, The method further includes: If it is determined that the third value is equal to the first value, the fourth value is equal to the second value, the second blind zone range is the same as the first blind zone range, and the correspondence between the at least one first measurement point and the at least one first physical space includes the correspondence between the at least one second measurement point and the at least one second physical space and the correspondence between the at least one third measurement point and the at least one third physical space, then it is determined that the updated first duration, the updated second duration, and the first physical quantity calculation algorithm satisfy the working state of the fiber optic sensor, and therefore it is determined that all measurement points on the first fiber optic section and the second fiber optic section have been detected.

16. The method according to claim 15, characterized in that, The second measurement result also includes at least one second measurement data corresponding to the at least one second measurement point and at least one third measurement data corresponding to the at least one third measurement point; After determining that all measurement points on the first and second fiber optic sections have been detected, the method further includes: Output at least one first measurement data corresponding to the at least one second measurement point and at least one second measurement data corresponding to the at least one third measurement point.

17. The method according to claim 15 or 16, characterized in that, The method further includes: If the sum of the number of second measurement points corresponding to the at least one second measurement point and the number of third measurement points corresponding to the at least one third measurement point is less than a second preset number, then it is determined that the fiber optic sensor has at least two breakpoints. If the sum of the number of the second measurement points and the number of the third measurement points is equal to the second preset number, then it is determined that there is a breakpoint in the fiber optic sensor.

18. The method according to claim 17, characterized in that, The second preset number is determined based on the rated number of measurement points of the fiber optic sensor, the unit dead zone length of the fiber optic sensor, and the total fiber length of the fiber optic sensor.

19. The method according to claim 18, characterized in that, The second preset number satisfies the following formula: Wherein, N2 is the second preset number.

20. The method according to any one of claims 3-19, characterized in that, The method further includes: If it is determined that the number of the first measurement points is equal to the first preset number, then it is determined that the fiber optic sensor has no breakpoints.

21. An electronic device, characterized in that, Includes a processor, which is connected to a memory. The memory is used to store computer programs; The processor is configured to execute a computer program stored in the memory to cause the electronic device to perform the method as described in any one of claims 1 to 20.

22. A detection device, characterized in that, The detection device includes a light source, a circulator, an optical switch, and a detection control component. The detection control component is connected to the light source, the circulator, and the optical switch. The light source is connected to the optical switch through the circulator. The optical switch is connected to a first end and a second end of an optical fiber sensor. The first end is located in the first optical fiber portion of the optical fiber sensor, and the second end is located in the second optical fiber portion of the optical fiber sensor.

23. The detection device according to claim 22, characterized in that, The detection and control component is used to determine that there is a breakpoint in the fiber optic sensor; The optical switch is used to provide measurement optical carriers to the first and second optical fiber portions of the optical fiber sensor respectively, so that measurement points on the first and second optical fiber portions are detected, wherein the first and second optical fiber portions are located on both sides of the break point.

24. The detection device according to claim 23, characterized in that, The detection and control component is used to obtain the first length of the first optical fiber portion and the second length of the second optical fiber portion; The detection control component is further configured to adjust the first duration of providing the measurement optical carrier to the first optical fiber portion, the second duration of providing the measurement optical carrier to the second optical fiber portion, and the physical quantity calculation algorithm according to the first length and the second length, so that all measurement points on the first optical fiber portion and the second optical fiber portion are detected.

25. The detection device according to claim 23 or 24, characterized in that, The optical switch is used to establish a connection between the circulator and the first end or the second end, so as to provide the measurement optical carrier output by the circulator to the first optical fiber section or the second optical fiber section respectively, and to provide the measurement optical signal output by the first optical fiber section or the second optical fiber section to the circulator respectively.

26. The detection device according to claim 25, characterized in that, The circulator is used to transmit the measurement optical carrier generated by the light source to the optical switch; The circulator is also used to transmit the measurement optical signal from the optical switch to the detection and control component; The detection and control component is also used to generate a measurement result corresponding to any measurement cycle based on the measurement optical signal received from the circulator within any measurement cycle; The detection control component is further configured to, when determining that there is a breakpoint in the optical fiber sensor based on the measurement result corresponding to any measurement cycle, acquire the first length of the first optical fiber portion and the second length of the second optical fiber portion, and adjust the first duration of providing the measurement optical carrier to the first optical fiber portion, the second duration of providing the measurement optical carrier to the second optical fiber portion, and the physical quantity calculation algorithm based on the first length and the second length, until it is determined that all measurement points on the first optical fiber portion and the second optical fiber portion have been detected.

27. The detection device according to claim 26, characterized in that, The detection and control component includes a detection and acquisition component, a signal processor, and a controller. The detection and acquisition component is connected to the circulator, and the detection and acquisition component is also connected to the controller through the signal processor. The controller is also connected to the optical switch. The detection and acquisition component is used to generate one or more acquisition results corresponding to any measurement cycle based on the measurement optical signal received from the circulator within any measurement cycle; The signal processor is used to calculate one or more acquisition results corresponding to any measurement cycle based on a physical quantity calculation algorithm to obtain one or more detection results corresponding to any measurement cycle; The signal processor is also used to process one or more detection results corresponding to any measurement cycle to obtain the measurement result corresponding to any measurement cycle. The controller is used to, when it is determined that there is a breakpoint in the optical fiber sensor based on the measurement result corresponding to any measurement cycle, obtain the first length of the first optical fiber portion and the second length of the second optical fiber portion, and adjust the first duration of providing the measurement optical carrier to the first optical fiber portion, the second duration of providing the measurement optical carrier to the second optical fiber portion, and the physical quantity calculation algorithm according to the first length and the second length, until it is determined that all measurement points on the first optical fiber portion and the second optical fiber portion have been detected.

28. The detection device according to claim 27, characterized in that, The signal processor is configured to: acquire a first measurement result corresponding to the fiber optic sensor within a first measurement period, wherein the first measurement result includes at least one first measurement point detected from the fiber optic sensor within the first measurement period; The controller is configured to: if it is determined that the number of first measurement points corresponding to the at least one first measurement point is less than a first preset number, then determine that there is a breakpoint in the fiber optic sensor.

29. The detection device according to claim 28, characterized in that, The first preset number is determined based on the rated number of measurement points of the fiber optic sensor, the unit dead zone length of the fiber optic sensor, and the total fiber length of the fiber optic sensor.

30. The detection device according to claim 29, characterized in that, The first preset number satisfies the following formula: Wherein, N1 is the first preset number, N0 is the rated number of measurement points of the fiber optic sensor, S is the unit blind zone length of the fiber optic sensor, and L0 is the total fiber length of the fiber optic sensor.

31. The detection device according to any one of claims 28-30, characterized in that, The controller is also used for: Acquire the first moment, wherein the first moment is the moment when the detection and acquisition component last acquired the first measurement optical signal from the first optical fiber portion within the first pulse period of the first measurement period; The first transmission duration of the measurement optical carrier corresponding to the first measurement optical signal in the first optical fiber section is determined based on the first moment. The first length of the first optical fiber portion is determined based on the first transmission duration. The second length of the second optical fiber portion is determined based on the first length and the total length of the optical fiber of the optical fiber sensor.

32. The detection device according to claim 31, characterized in that, The controller is also used for: The second transmission duration is calculated based on the first moment and the start time of the first pulse period; The first transmission duration of the measurement optical carrier in the first optical fiber section is calculated based on the second transmission duration, the third transmission duration of the measurement optical carrier from the light source to the first end of the optical fiber sensor, and the fourth transmission duration of the first measurement optical signal from the first end to the detection and acquisition component, wherein the first end is located in the first optical fiber section.

33. The detection device according to claim 31 or 32, characterized in that, The first measurement result also includes at least one first physical space corresponding to the at least one first measurement point; The controller is also used for: A first value corresponding to the first duration of transmitting the measurement optical carrier to the first optical fiber portion is determined based on the first length. The second value corresponding to the second duration of transmitting the measurement optical carrier to the second optical fiber section is determined based on the second length. The first blind zone range of the optical fiber sensor within the first measurement period is determined based on the first length and the second length. If, based on the first value, the second value, the first blind zone range, and the correspondence between the at least one first measurement point and the at least one first physical space, it is determined that at least one of the following—the first duration, the second duration, and the physical quantity calculation algorithm—does not meet the working state of the fiber optic sensor, then the first duration is updated using the first value to obtain an updated first duration, the second duration is updated using the second value to obtain an updated second duration, and the physical quantity calculation algorithm used by the signal processor is updated using the first blind zone range, the number of first measurement points, and the correspondence between the at least one first measurement point and the at least one first physical space to obtain an updated first physical quantity calculation algorithm. During the second measurement cycle, the optical switch is controlled to establish a connection between the circulator and the first end within the updated first duration, and to establish a connection between the circulator and the second end within the updated second duration; The first and second optical fiber sections are tested again until it is determined that all measurement points on the first and second optical fiber sections have been detected.

34. The detection device according to claim 33, characterized in that, The controller is used for: The detection and acquisition component and the signal processor acquire the second measurement result corresponding to the fiber optic sensor in the second measurement cycle. The second measurement result includes at least one second measurement point detected from the first fiber optic portion in the second measurement cycle and at least one second physical space corresponding to the at least one second measurement point. The second measurement result also includes at least one third measurement point detected from the second fiber optic portion in the second measurement cycle and at least one third physical space corresponding to the at least one third measurement point. If it is determined from the second measurement result that there is a break in the optical fiber sensor, then the third length of the first optical fiber portion and the fourth length of the second optical fiber portion of the optical fiber sensor are obtained. The third value corresponding to the first duration is determined based on the third length; The fourth value corresponding to the second duration is determined based on the fourth length. The second blind zone range of the fiber optic sensor within the second measurement period is determined based on the third length and the fourth length. If, based on the third value, the fourth value, the second blind zone range, the correspondence between the at least one second measurement point and the at least one second physical space, and the correspondence between the at least one third measurement point and the at least one third physical space, it is determined that the updated first duration, the updated second duration, and the first physical quantity calculation algorithm all satisfy the working state of the optical fiber sensor, then it is determined that all measurement points on the first optical fiber portion and the second optical fiber portion have been detected.

35. The detection device according to claim 34, characterized in that, The controller is used for: The second time point is obtained, wherein the second time point is the moment when the detection and acquisition component last acquired the first measurement optical signal from the first end within the second pulse period of the second measurement period. The fifth transmission duration of the measurement optical carrier corresponding to the first measurement optical signal in the first optical fiber section is determined based on the second time, and the third length of the first optical fiber section is determined based on the fifth transmission duration.

36. The detection device according to claim 34 or 35, characterized in that, The controller is used for: The third moment is obtained, wherein the third moment is the moment when the detection and acquisition component last acquired the second measurement optical signal from the second end within the third pulse period of the second measurement period; The sixth transmission duration of the measurement optical carrier corresponding to the second measurement optical signal in the second optical fiber section is determined based on the third time, and the fourth length of the second optical fiber section is determined based on the sixth transmission duration.

37. The detection device according to any one of claims 34-36, characterized in that, The controller is also used for: If, based on the third value, the fourth value, the second blind zone range, the correspondence between the at least one second measurement point and the at least one second physical space, and the correspondence between the at least one third measurement point and the at least one third physical space, it is determined that at least one of the updated first duration, the updated second duration, and the first physical quantity calculation algorithm does not satisfy the working state of the fiber optic sensor, then the first duration is updated using the third value to obtain a further updated first duration, the second duration is updated using the fourth value to obtain a further updated second duration, and the first physical quantity calculation algorithm used for signal processing is updated using the second blind zone range, the number of second measurement points, the number of third measurement points, the correspondence between the at least one second measurement point and the at least one second physical space, and the correspondence between the at least one third measurement point and the at least one third physical space to obtain an updated second physical quantity calculation algorithm; During the third measurement cycle, the optical switch is controlled to establish the connection between the circulator and the first end within the first duration after the second update, and to establish the connection between the circulator and the second end within the second duration after the second update. The first and second optical fiber sections are tested again until it is determined that all measurement points on the first and second optical fiber sections have been detected.

38. The detection apparatus according to any one of claims 34-37, characterized in that, The controller is also used for: If at least one of the following is determined: the third value is not equal to the first value; the fourth value is not equal to the second value; the second blind zone range is not the same as the first blind zone range; the correspondence between the at least one first measurement point and the at least one first physical space does not include the correspondence between the at least one second measurement point and the at least one second physical space, and the correspondence between the at least one third measurement point and the at least one third physical space, then it is determined that at least one of the first duration, the second duration, and the first physical quantity calculation algorithm currently used by the detection device does not satisfy the working state of the fiber optic sensor.

39. The detection device according to any one of claims 34-38, characterized in that, The controller is also used for: If the sum of the number of second measurement points corresponding to the at least one second measurement point and the number of third measurement points corresponding to the at least one third measurement point is less than a second preset number, then it is determined that the fiber optic sensor has at least two breakpoints. If the sum of the number of the second measurement points and the number of the third measurement points is equal to the second preset number, then it is determined that there is a breakpoint in the fiber optic sensor.

40. The detection device according to claim 39, characterized in that, The second preset number is determined based on the rated number of measurement points of the fiber optic sensor, the unit dead zone length of the fiber optic sensor, and the total fiber length of the fiber optic sensor.

41. The detection device according to claim 40, characterized in that, The second preset number satisfies the following formula: Wherein, N2 is the second preset number.

42. The detection device according to any one of claims 30-41, characterized in that, The controller is also used for: If it is determined that the number of the first measurement points is equal to the first preset number, then it is determined that the fiber optic sensor has no breakpoints.

43. The detection device according to any one of claims 22-42, characterized in that, The detection and control device includes the electronic device as described in claim 21.

44. A vehicle, characterized in that, The vehicle includes the detection device and fiber optic sensor as described in any one of claims 22-43.

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