Fiber optic sensing system, control method, electronic and electrical system, and vehicle

Abstract

A fiber optic sensing system, a control method, an electronic and electrical system, and a vehicle. The fiber optic sensing system comprises: at least two sensing optical paths and a detection and collection device, wherein each sensing optical path is connected to the detection and collection device, and the detection and collection device is configured to collect optical signals in the sensing optical paths.

Description

Fiber optic sensing systems, control methods, electronic and electrical systems, and vehicles

[0001] This application claims priority to Chinese patent application No. 202411658379.5, filed on November 18, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This disclosure relates to the field of optical communication technology, and in particular to an optical fiber sensing system, control method, electronic and electrical system, and vehicle. Background Technology

[0003] In related technologies, in order to simplify the structure of sensing systems, a scheme is proposed to detect physical quantity information in various environments (such as computer rooms and power distribution rooms) or equipment (such as vehicles and ships) by utilizing the sensing characteristics of optical fibers themselves. This scheme solves the problem of complex system structure caused by traditional sensor detection of physical quantities. Summary of the Invention

[0004] This disclosure provides a fiber optic sensing system, control method, electronic and electrical system, and vehicle, aiming to solve the problems of low security and reliability of fiber optic sensing systems in related technologies.

[0005] To solve the above problems, this disclosure adopts the following technical solution:

[0006] On one hand, a fiber optic sensing system is provided, comprising: at least two sensing optical paths and at least one detection and acquisition device, wherein each of the at least two sensing optical paths is connected to the detection and acquisition device. The detection and acquisition device is configured to acquire optical signals in each sensing optical path.

[0007] The fiber optic sensing system provided in this disclosure achieves redundancy in its system architecture by setting at least two sensing optical paths. When a single sensing optical path fails or malfunctions, the other sensing optical paths can still function normally and continue to provide sensing data, reducing the risk of the entire system failing due to a single path failure and improving the safety and reliability of the fiber optic sensing system.

[0008] In some embodiments, at least one detection and acquisition device includes at least two detection and acquisition devices, and each sensing optical path is connected to its corresponding detection and acquisition device.

[0009] In some embodiments, the fiber optic sensing system may further include a beam splitter, which includes an input port and at least two output ports. The input port of the beam splitter is configured to connect to a light source, and each sensing optical path is connected to a corresponding output port of the beam splitter. The beam splitter is configured to split the optical signal generated by the light source into at least two optical signals and output them to the corresponding sensing optical paths.

[0010] In some embodiments, the sensing optical path includes a coupler and a sensing optical fiber. A first port of the coupler is connected to a corresponding output port of at least two output ports of a beam splitter, a second port of the coupler is connected to the sensing optical fiber, and a third port of the coupler is connected to at least one of at least two detection and acquisition devices. The sensing optical fiber is configured to receive the optical signal output from the coupler and generate a backscattered signal. The coupler is configured to receive the backscattered signal and output it to at least one detection and acquisition device.

[0011] In some embodiments, the coupler is a circulator.

[0012] In some embodiments, the fiber optic sensing system may also include a light source.

[0013] In some embodiments, if there is a break in at least one of the at least two sensing optical paths, the detection and acquisition device corresponding to the at least one sensing optical path without a break is configured to increase the sampling frequency to increase the actual number of sampling points in the at least one sensing optical path without a break.

[0014] In some embodiments, if at least one of the at least two sensing optical paths has a breakpoint, the detection and acquisition device corresponding to the at least one sensing optical path without a breakpoint is configured to increase the sampling frequency so that the sum of the actual sampling points of all sensing optical paths matches the sum of the preset sampling points of all sensing optical paths.

[0015] In some embodiments, if there is a break in at least one of the at least two sensing optical paths, the detection and acquisition device corresponding to the at least one sensing optical path with the break is configured to stop sampling, and the detection and acquisition device corresponding to the at least one sensing optical path without the break is configured to increase the sampling frequency so that the sum of the actual sampling points of all sensing optical paths without the break matches the sum of the preset sampling points of all sensing optical paths.

[0016] In some embodiments, if at least one of the at least two sensing optical paths has a breakpoint, the detection and acquisition device corresponding to the at least one sensing optical path with the breakpoint is configured to maintain sampling operation, the detection and acquisition device corresponding to the at least one sensing optical path without a breakpoint is configured to maintain sampling operation, and the detection and acquisition device corresponding to the at least one sensing optical path without a breakpoint is configured to increase the sampling frequency so that the sum of the actual sampling points of all sensing optical paths matches the sum of the preset sampling points of all sensing optical paths.

[0017] In some embodiments, if there is a break in at least one of the at least two sensing optical paths, the detection and acquisition device corresponding to the at least one sensing optical path with the break is configured to maintain sampling operation, and the detection and acquisition device corresponding to the at least one sensing optical path without the break is configured to maintain the original sampling frequency in the first time interval of the sampling period and to increase the sampling frequency in the second time interval of the sampling period, so that the sum of the actual sampling points of all sensing optical paths matches the sum of the preset sampling points of all sensing optical paths.

[0018] In some embodiments, the duration of the first time interval is twice the breakpoint detection duration, the breakpoint detection duration is the time it takes for light to travel from the starting point of the sensing optical path where the breakpoint exists to the breakpoint, and the second time interval is the time interval in the sampling period other than the first time interval.

[0019] In some embodiments, if the actual number of sampling points of the optical signal collected by the detection and acquisition device corresponding to any of the at least two sensing optical paths is lower than the preset number of sampling points corresponding to the sensing optical path, there is a break in the sensing optical path.

[0020] In some embodiments, the fiber optic sensing system further includes a controller connected to the detection and acquisition device. The controller is configured to receive sensing information corresponding to the optical signals fed back by the detection and acquisition device.

[0021] In some embodiments, the controller is further configured to adjust the sampling frequency of the detection and acquisition device based on the sensing information corresponding to the optical signal.

[0022] In some embodiments, the controller is further configured to output a breakpoint alarm message to an alarm device if a breakpoint exists in any of the at least two sensing optical paths.

[0023] In some embodiments, the fiber optic sensing system further includes a signal processing device connected between the detection and acquisition device and the controller.

[0024] On the other hand, a control method is provided for use in an optical fiber sensing system. The method includes adjusting the sampling frequency of the detection and acquisition device according to the sensing information corresponding to the optical signal.

[0025] In some embodiments, adjusting the sampling frequency of the detection and acquisition device based on the sensing information corresponding to the optical signal includes: increasing the sampling frequency of the detection and acquisition device corresponding to the at least one sensing optical path without a break in the sensing information of the optical signal, so as to increase the actual number of sampling points in the at least one sensing optical path without a break.

[0026] In some embodiments, increasing the sampling frequency of the detection and acquisition device corresponding to at least one sensing optical path without breakpoints to increase the actual number of sampling points in at least one sensing optical path without breakpoints includes: increasing the sampling frequency of the detection and acquisition device corresponding to at least one sensing optical path without breakpoints so that the sum of the actual number of sampling points of all sensing optical paths matches the sum of the preset number of sampling points of all sensing optical paths.

[0027] In some embodiments, if there is a break in at least one of the at least two sensing optical paths, the detection and acquisition device corresponding to the at least one sensing optical path with the break is configured to stop sampling, and the detection and acquisition device corresponding to the at least one sensing optical path without the break is configured to increase the sampling frequency so that the sum of the actual sampling points of all sensing optical paths without the break matches the sum of the preset sampling points of all sensing optical paths.

[0028] In some embodiments, if there is a break in at least one of the at least two sensing optical paths, the detection and acquisition device corresponding to the at least one sensing optical path with the break is configured to maintain sampling operation, and the detection and acquisition device corresponding to the at least one sensing optical path without the break is configured to increase the sampling frequency so that the sum of the actual sampling points of all sensing optical paths matches the sum of the preset sampling points of all sensing optical paths.

[0029] In some embodiments, if there is a break in at least one of the at least two sensing optical paths, the detection and acquisition device corresponding to the at least one sensing optical path with the break is configured to maintain sampling operation, and the detection and acquisition device corresponding to the at least one sensing optical path without the break is configured to maintain the original sampling frequency in the first time interval of the sampling period and to increase the sampling frequency in the second time interval of the sampling period, so that the sum of the actual sampling points of all sensing optical paths matches the sum of the preset sampling points of all sensing optical paths.

[0030] In some embodiments, the duration of the first time interval is twice the breakpoint detection duration, the breakpoint detection duration is the time it takes for light to travel from the starting point of the sensing optical path where the breakpoint exists to the breakpoint, and the second time interval is the time interval in the sampling period other than the first time interval.

[0031] In some embodiments, the control method may further include: outputting a breakpoint alarm message to an alarm device when the sensing information of the optical signal indicates that at least one sensing optical path has a breakpoint.

[0032] In another aspect, an electronic device is provided, including a processor connected to a memory, the memory storing a computer program that can run on the processor, the processor executing the program to implement the above-mentioned control method.

[0033] In another aspect, a computer-readable storage medium is provided, which stores instructions that, when executed by a computer, enable the computer to perform the aforementioned control method.

[0034] On the other hand, a computer program product containing computer programs or instructions is provided, which, when run on an electronic device, causes the electronic device to perform the aforementioned control method.

[0035] On the other hand, a chip is provided, which includes a processor and a communication interface coupled to the processor. The processor is configured to run computer programs or instructions to implement the control method described above.

[0036] The chip provided in some embodiments of this disclosure also includes a memory configured to store computer programs or instructions.

[0037] It should be noted that the aforementioned computer program or instructions may be stored, in whole or in part, on a computer-readable storage medium. The computer-readable storage medium may be packaged together with the processor of the device, or it may be packaged separately from the processor of the device; this disclosure does not impose any limitations on this.

[0038] On the other hand, an electronic and electrical system is provided, including the aforementioned fiber optic sensing system and alarm device, wherein the fiber optic sensing system is connected to the alarm device.

[0039] On the other hand, a vehicle is provided, including the aforementioned fiber optic sensing system, or the aforementioned electronic device, or the aforementioned electronic and electrical system. Attached Figure Description

[0040] To more clearly illustrate the technical solutions of the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0041] Figure 1 is a structural diagram of an optical cable fault analysis device provided in related technologies;

[0042] Figure 2 is an architecture diagram of a vehicle according to some embodiments;

[0043] Figure 3 is an architecture diagram of a fiber optic sensing system according to some embodiments;

[0044] Figure 4 is an architecture diagram of another fiber optic sensing system according to some embodiments;

[0045] Figure 5 is a schematic diagram of a dual-path sensing optical fiber according to some embodiments;

[0046] Figure 6 is a flowchart of a control method according to some embodiments;

[0047] Figure 7 is a flowchart of a fiber optic sensing system according to some embodiments;

[0048] Figure 8 is a flowchart of a breakpoint detection process for a fiber optic sensing system according to some embodiments.

[0049] Figure 9 is a flowchart of a breakpoint detection process for another fiber optic sensing system according to some embodiments.

[0050] Figure 10 is a flowchart of a sampling frequency determination method for an optical fiber sensing system according to some embodiments;

[0051] Figure 11 is a schematic diagram of another dual-path sensing fiber according to some embodiments;

[0052] Figure 12 is a schematic diagram of yet another dual-path sensing fiber according to some embodiments;

[0053] Figure 13 is a schematic diagram of yet another dual-path sensing fiber according to some embodiments;

[0054] Figure 14 is a schematic diagram of yet another dual-path sensing fiber according to some embodiments;

[0055] Figure 15 is a block diagram of an electronic device according to some embodiments. Detailed Implementation

[0056] The technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments of this disclosure, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this disclosure.

[0057] In the description of this disclosure, it should be understood that the terms "upper," "lower," "left," "right," "front," "rear," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or relative positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this disclosure and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure. Unless otherwise specified, the above-mentioned orientational descriptions can be flexibly set in practical applications, provided that the relative positional relationships shown in the accompanying drawings are satisfied.

[0058] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this disclosure, unless otherwise stated, "a plurality of" means two or more.

[0059] In the description of this disclosure, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "communication" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. They can refer to a direct connection or an indirect connection through an intermediate medium, or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0060] In some embodiments, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, article, or apparatus that includes that element.

[0061] In some embodiments, the words "exemplary" or "for example" are used to indicate that something is an example, illustration, or illustration. Any embodiment or design described as "exemplary" or "for example" in this disclosure should not be construed as being more preferred or advantageous than other embodiments or designs. Rather, the use of the words "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0062] In the description of this specification, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0063] Currently, sensors are installed in environments (such as computer rooms and power distribution rooms) or equipment (such as vehicles and ships) to detect data such as temperature and pressure of their corresponding components.

[0064] In related technologies, a fiber optic cable fault location analysis device is provided to locate the fault position of a fiber optic cable. As shown in Figure 1, the multi-core fiber optic cable fault location analysis device 100 includes a route planning module 110, a monitoring and positioning module 120, a light generation device 130, a fiber optic cable fault detection device 140, and a model fault location module 150. The monitoring and positioning module 120 includes a coarse location locking module 121 and a fine location locking module 122.

[0065] For example, the location coarse locking module 121 can monitor multiple set monitoring and positioning locations to achieve coarse location locking of optical cable faults, and then the point fine locking module 122 can monitor the area coarsely locked to achieve fine location locking of optical cable faults.

[0066] However, although the aforementioned fault location analysis equipment can locate the fault position of the optical cable, it cannot continue to use the optical signal in the faulty optical cable for data processing after the optical cable fails, and the entire optical fiber sensing system will not work properly, thus failing to meet the safety and reliability requirements of the optical fiber sensing system.

[0067] Against this backdrop, in order to address the issues of low security and reliability in fiber optic sensing systems in related technologies, this disclosure provides some embodiments of a fiber optic sensing system, a control method, an electronic and electrical system, and a vehicle. The implementation methods of the embodiments of this disclosure will be described in detail below with reference to the accompanying drawings.

[0068] The fiber optic sensing system provided in this disclosure can be applied to any device that requires sensing and detection. For example, it can be applied to vehicles for vehicle body detection; it can be applied to ships for hull detection; and it can be applied to computer rooms for monitoring the computer environment, etc.

[0069] The following describes the fiber optic sensing system provided in this disclosure by taking the application of a fiber optic sensing system in a vehicle to detect the vehicle body as an example.

[0070] This disclosure provides a vehicle in some embodiments, including but not limited to electric drive vehicles, gasoline drive vehicles, or hybrid electric drive vehicles.

[0071] The following description uses an electrically driven vehicle as an example to illustrate some embodiments of this disclosure.

[0072] In some embodiments, as shown in FIG2, vehicle 102 includes battery 10 and electronic and electrical system 20.

[0073] In some embodiments, the electronic and electrical system 20 may be deployed throughout the vehicle body 102 to control devices or modules in various areas of the vehicle 102.

[0074] In some embodiments, the electronic and electrical system 20 may include a fiber optic sensing system 200 to sense physical quantities in various areas within the vehicle 102 via optical fibers, and to perform fault detection.

[0075] In some embodiments, the electronic and electrical system 20 may also include an alarm device, and the fiber optic sensing system 200 is connected to the alarm device.

[0076] In some embodiments, the fiber optic sensing system 200 includes a detection and acquisition device and at least two sensing optical paths, each of which is connected to the detection and acquisition device. For example, the detection and acquisition device may be a detector or similar device.

[0077] Taking at least two sensing optical paths, including a first sensing optical path and a second sensing optical path, as an example. As shown in Figure 3, the fiber optic sensing system 200 includes a detection and acquisition device 201, a first sensing optical path 220, and a second sensing optical path 230. The first sensing optical path 220 is connected to the detection and acquisition device 201, and the second sensing optical path 230 is connected to the detection and acquisition device 201.

[0078] The first optical sensing path 220 and the second optical sensing path 230 are redundant.

[0079] In some embodiments, the detection and acquisition device 201 is configured to acquire optical signals in the sensing optical path.

[0080] For example, the detection and acquisition device 201 is configured to acquire optical signals in the first sensing optical path 220 and the second sensing optical path 230, respectively.

[0081] In the fiber optic sensing system provided in some embodiments of this disclosure, redundancy in the system architecture is achieved by setting at least two sensing optical paths. When a single sensing optical path fails or malfunctions, the other sensing optical paths can still function normally and continue to provide sensing data, reducing the risk of the entire system failing due to a single path failure and improving the security of the fiber optic sensing system. Furthermore, the existence of multiple sensing optical paths allows the system to acquire richer sensing information. By comparing the data collected by the detection and acquisition device in different sensing optical paths, cross-validation can be performed, thereby more accurately determining the sensing status and improving the reliability of the fiber optic sensing system.

[0082] In some embodiments, the fiber optic sensing system includes at least two detection and acquisition devices, with each sensing optical path connected to its corresponding detection and acquisition device. Each sensing optical path includes a coupler and a sensing optical fiber.

[0083] Taking at least two detection and acquisition devices, including a first detection and acquisition device and a second detection and acquisition device, as an example. As shown in Figure 4, the fiber optic sensing system 200 includes a first detection and acquisition device 210, a second detection and acquisition device 240, a light source 250, a beam splitter 260, a first coupler (such as a first circulator 221), a first sensing fiber 222, a second coupler (such as a second circulator 231), a second sensing fiber 232, a signal processing device 270, and a controller 280.

[0084] In some embodiments, the light source 250 is configured to emit an optical signal. For example, the light source 250 may be a laser or a light-emitting diode, which is configured to emit periodic pulsed laser light with a specific pulse width and intensity.

[0085] In some embodiments, the beam splitter 260 includes an input port and at least two output ports (such as a first output port and a second output port), the light source 250 is connected to the input port of the beam splitter 260, a first sensing optical path 220 is connected to one output port of the beam splitter 260 (such as the first output port), and a second sensing optical path 230 is connected to the other output port of the beam splitter 260 (such as the second output port).

[0086] In some embodiments, the beam splitter 260 is configured to split the optical signal generated by the light source 250 into at least two optical signals and output them to corresponding sensing optical paths. For example, the beam splitter 260 can be a beam splitter or an optical splitter, which is configured to split a periodic pulse laser with a specific pulse width and intensity into at least two beams.

[0087] For example, the beam splitter 260 is configured to split the optical signal generated by the light source 250 into at least two optical signals and output them to the first sensing optical path 220 and the second sensing optical path 230, respectively.

[0088] In some embodiments, the first circulator 221 includes a first port, a second port, and a third port. The first port of the first circulator 221 is connected to an output port (such as the first output port) of the beam splitter 260, the second port of the first circulator 221 is connected to the first sensing fiber 222, and the third port of the first circulator 221 is connected to at least one detection and acquisition device (such as the first detection and acquisition device 210).

[0089] In some embodiments, the first sensing fiber 222 is configured to receive the optical signal output by the first circulator 221 and generate a backscattered signal. The first circulator 221 is configured to receive the backscattered signal and output it to at least one detection and acquisition device (such as the first detection and acquisition device 210).

[0090] In some embodiments, the first sensing fiber 222 may also be configured to sense physical quantities and carry those quantities via backscattered signals. Physical quantities may include temperature, pressure, velocity, etc.

[0091] For example, when the first sensing fiber 222 transmits optical signals, it will generate backscattered signals. The backscattered signals will be modulated by the external environment of the fiber. The first sensing fiber 222 can send the modulated backscattered signals to the first circulator 221.

[0092] In some embodiments, the first circulator 221 is configured to transmit the optical signal output from the first output port of the beam splitter 260 via the first sensing optical fiber 222 to form a first sensing optical path 220.

[0093] For example, the first circulator 221 can transmit optical signals to the first sensing fiber 222 through the second port and receive the backscattered signals from the first sensing fiber 222.

[0094] In some embodiments, the second circulator 231 includes a first port, a second port, and a third port. The first port of the second circulator 231 is connected to an output port (such as the second output port) of the beam splitter 260, the second port of the second circulator 231 is connected to the second sensing fiber optic cable 232, and the third port of the second circulator 231 is connected to at least one detection and acquisition device (such as the second detection and acquisition device 240).

[0095] In some embodiments, the first coupler and the second coupler may also be devices such as optical switches, optical filters, and optical isolators that have the function of distributing, multiplexing, and demultiplexing optical signals.

[0096] In some embodiments, the second sensing fiber 232 is configured to receive the optical signal output by the second circulator 231 and generate a backscattered signal. The second circulator 231 is configured to receive the backscattered signal and output it to at least one detection and acquisition device (such as the second detection and acquisition device 240).

[0097] In some embodiments, the second sensing fiber 232 may also be configured to sense physical quantities and carry physical quantities via backscattered signals.

[0098] For example, when the second sensing fiber 232 transmits optical signals, it will generate backscattered signals. The backscattered signals will be modulated by the external environment of the fiber. The second sensing fiber 232 can send the modulated backscattered signals to the second circulator 231.

[0099] In some embodiments, the second circulator 231 is configured to transmit the optical signal output from the second output port of the beam splitter 260 via the second sensing optical fiber 232 to form a second sensing optical path 230.

[0100] For example, the second circulator 231 can transmit optical signals to the second sensing fiber 232 through the second port and receive the backscattered signals from the second sensing fiber 232.

[0101] In some embodiments, the first detection and acquisition device 210 and the second detection and acquisition device 240 are respectively connected to the signal processing device 270, and the signal processing device 270 is connected to the controller 280.

[0102] In some embodiments, the first detection and acquisition device 210 is configured to sample the optical signal in the first sensing optical path 220 to obtain first sampling data. The first sampling data may include the number of sampling points in the first sensing optical fiber 222 and the physical quantity of the sampling points.

[0103] For example, the first detection and acquisition device 210 is configured to acquire backscattered signals generated at each sampling point on the first sensing fiber 222, and convert the acquired backscattered signals into electrical signals and send them to the signal processing device 270.

[0104] In some embodiments, the second detection and acquisition device 240 is configured to sample the optical signal in the second sensing optical path 230 to obtain second sampling data, which may include the number of sampling points in the second sensing optical fiber 232 and the physical quantity of the sampling points.

[0105] For example, the second detection and acquisition device 240 is configured to acquire backscattered signals generated at each sampling point on the second sensing fiber 232, and convert the acquired backscattered signals into electrical signals and send them to the signal processing device 270.

[0106] In some embodiments, the signal processing device 270 is configured to convert first sampled data into a first physical quantity, convert second sampled data into a second physical quantity, and send the first physical quantity and the second physical quantity to the controller 280.

[0107] The first physical quantity includes the physical quantity of the actual sampling point corresponding to the first sampling data, and the second physical quantity includes the physical quantity of the actual sampling point corresponding to the second sampling data.

[0108] For example, the signal processing device 270 can analyze the electrical signals output by the first detection and acquisition device 210 and the second detection and acquisition device 240 to obtain the temperature data they carry.

[0109] Thus, some embodiments of this disclosure convert the sampling data collected by the two optical paths to obtain their respective corresponding physical quantities, thereby acquiring data information of various vehicle components.

[0110] The signal processing device 270 can also analyze the electrical signals output by the first detection and acquisition device 210 and the second detection and acquisition device 240 to obtain the actual number of sampling points collected by the first detection and acquisition device 210 and the actual number of sampling points collected by the second detection and acquisition device 240.

[0111] In some embodiments, the controller 280 is configured to: receive sensing information corresponding to the optical signal fed back by the detection and acquisition device; and adjust the sampling frequency of the detection and acquisition device based on the sensing information corresponding to the optical signal.

[0112] Sensing information can characterize whether there is a break in the sensing optical path or whether there is no break in the sensing optical path. Sensing information may include a first physical quantity and a second physical quantity obtained by the signal processing device 270 described above.

[0113] In some embodiments, if the actual number of sampling points of the optical signal collected by the detection and acquisition device corresponding to the sensing optical path is lower than the preset number of sampling points corresponding to the sensing optical path, there is a break in the sensing optical path.

[0114] In some embodiments, the presence or absence of a breakpoint in the first sensing optical path 220 can be determined based on the actual number of sampling points collected by the first detection and acquisition device 210 corresponding to the first sensing optical path 220 and the preset number of sampling points corresponding to the first sensing optical path 220.

[0115] For example, let's take the case where the preset number of sampling points of the first detection and acquisition device 210 on the first sensing optical path 220 is 8. If the actual number of sampling points collected by the first detection and acquisition device 210 is 5, then since 5 is less than 8, it indicates that there is a break in the first sensing optical path 220.

[0116] In some embodiments, the presence or absence of a breakpoint in the second sensing optical path 230 can be determined based on the actual number of sampling points collected by the second detection and acquisition device 240 corresponding to the second sensing optical path 230 and the preset number of sampling points corresponding to the second sensing optical path 230.

[0117] For example, let's take the case where the preset number of sampling points of the second detection and acquisition device 240 on the second sensing optical path 230 is 8. If the actual number of sampling points collected by the second detection and acquisition device 240 is 8, then since 8 equals 8, it indicates that there is no breakpoint in the second sensing optical path 230.

[0118] In some embodiments, the controller 280 is further configured to output a breakpoint alarm message to an alarm device when a breakpoint exists in the sensing optical path.

[0119] Breakpoint alarm information can include the location information of the breakpoint and the physical quantity information of the sensing optical path where the breakpoint exists.

[0120] In some embodiments, alarm devices may include in-vehicle displays, in-vehicle speakers, in-vehicle warning lights, etc. Power failure alarm information may take the form of audible alarms, light alarms, vibration alarms, etc.

[0121] For example, if a breakpoint is detected in the first sensing optical path 220 or the second sensing optical path 230, the location information of the breakpoint and the physical quantities sensed by the first sensing optical fiber 222 and the second sensing optical fiber 232 are output to the connected alarm device.

[0122] Thus, on the one hand, some embodiments of this disclosure, by setting up two redundant optical paths in the fiber optic sensing system, ensure that even if one optical path fails, physical quantities such as temperature and pressure can still be sensed through the other optical path, providing reliable physical quantity measurement results and guaranteeing the reliability of the fiber optic sensing system. On the other hand, some embodiments of this disclosure can output the corresponding breakpoint location when an optical path break occurs, facilitating repair of the optical path breakpoint.

[0123] In some embodiments, when a sensor optical path with a breakpoint is identified, the sampling frequency of the detection and acquisition device corresponding to the sensor optical path without a breakpoint can be adjusted so that the adjusted actual number of sampling points is consistent with the total preset number of sampling points of all sensor optical paths.

[0124] Sampling frequency refers to the number of sampling points set on the sensing optical path by the detection and acquisition device per unit time.

[0125] In some embodiments, when there is a break in at least one sensing optical path, the detection and acquisition device corresponding to the at least one sensing optical path without a break is configured to increase the sampling frequency to increase the actual number of sampling points in the at least one sensing optical path without a break.

[0126] By increasing the actual number of sampling points in at least one sensing optical path without breakpoints, the sum of the actual sampling points of all sensing optical paths can be matched with the sum of the preset sampling points of all sensing optical paths.

[0127] In one possible implementation, if there is a break in at least one sensing optical path, the detection and acquisition device corresponding to the at least one sensing optical path with the break is configured to stop sampling, and the detection and acquisition device corresponding to the at least one sensing optical path without the break is configured to increase the sampling frequency so that the sum of the actual sampling points of all sensing optical paths without the break matches the sum of the preset sampling points of all sensing optical paths.

[0128] For example, taking the first detection and acquisition device 210 and the second detection and acquisition device 240 as examples where the preset number of sampling points is 6. If the first detection and acquisition device 210 actually collects 4 sampling points and the second detection and acquisition device 240 actually collects 6 sampling points, then the preset number of sampling points of the second detection and acquisition device 240 can be adjusted from 6 to 6+6=12.

[0129] Thus, in some embodiments of this disclosure, after determining that a break has occurred in one sensing optical path, sampling of that sensing optical path can be stopped directly, and the sampling frequency of the other sensing optical path can be increased, so that the total number of sampling points of the two sensing optical paths remains normal, ensuring that the fiber optic sensing system can still work normally, thereby improving the reliability of the fiber optic sensing system.

[0130] In another possible implementation, if there is a break in at least one sensing optical path, the detection and acquisition device corresponding to the at least one sensing optical path with the break is configured to maintain sampling operation, and the detection and acquisition device corresponding to the at least one sensing optical path without the break is configured to increase the sampling frequency so that the sum of the actual sampling points of all sensing optical paths matches the sum of the preset sampling points of all sensing optical paths.

[0131] In some embodiments, the detection and acquisition device corresponding to at least one sensing optical path with a breakpoint is configured to maintain sampling operation, and the detection and acquisition device corresponding to at least one sensing optical path without a breakpoint is configured to increase the sampling frequency so that the sum of the actual sampling points of all sensing optical paths matches the sum of the preset sampling points of all sensing optical paths. This means that the detection and acquisition device corresponding to at least one sensing optical path without a breakpoint is configured to maintain the original sampling frequency during the first time interval of the sampling period, and is configured to increase the sampling frequency during the second time interval of the sampling period so that the sum of the actual sampling points of all sensing optical paths matches the sum of the preset sampling points of all sensing optical paths.

[0132] The duration of the first time interval is twice the duration of the breakpoint detection, which is the time it takes for light to travel from the starting point of the sensing optical path to the breakpoint. The second time interval is the time interval in the sampling period other than the first time interval.

[0133] As shown in Figure 5, taking the lengths of the first sensing fiber 222 and the second sensing fiber 232 as X0, if the first sensing fiber 222 has a break point, and the break point is break point D, while the second sensing fiber 232 does not have a break point, then the sampling frequency of the second detection and acquisition device 240 corresponding to the second sensing fiber 232 can be maintained during the 2T1 time period, and the sampling frequency of the second detection and acquisition device 240 corresponding to the second sensing fiber 232 can be increased during the T-T1 time period.

[0134] The above T and T1 can be described by the following formulas (I) and (II).

[0135] X D X0 is the distance from the starting point to the break point of the first sensing fiber 222, X0 is the length of the first sensing fiber 222 and the second sensing fiber 232, T1 is the break point detection duration, 2T1 is the first time interval, 2T is the sampling period, and 2T-2T1 is the second time interval.

[0136] Taking the example that the preset sampling points of the first detection and acquisition device 210 and the second detection and acquisition device 240 are both 6. If the actual number of sampling points collected by the first detection and acquisition device 210 is 6 and the actual number of sampling points collected by the second detection and acquisition device 240 is 4, then the preset number of sampling points of the second detection and acquisition device before the breakpoint position can be maintained at 4. Then the preset number of sampling points of the first detection and acquisition device 210 can be adjusted from 6 to 6 + (6 - 4) = 8, so that the total number of points is still 4 + 8 = 12.

[0137] Thus, in some embodiments of this disclosure, after determining that a break has occurred in one sensing optical path, the sampling frequency of the sensing optical path where the break has occurred is maintained, and the sampling frequency of the other sensing optical path is increased, so that the total number of sampling points of the two optical paths remains normal, ensuring that the fiber optic sensing system can still work normally, thereby improving the reliability of the fiber optic sensing system.

[0138] The control methods provided by some embodiments of this disclosure will now be described with reference to FIG4 and FIG6 to FIG10 below.

[0139] It is understood that in the embodiments of this disclosure, each device in the fiber optic sensing system can perform some or all of the steps in the embodiments of this disclosure. These steps or operations are merely examples, and the embodiments of this disclosure can also perform other operations or variations thereof. Furthermore, the steps can be performed in different orders as presented in the embodiments of this disclosure, and it is not necessary to perform all the operations in the embodiments of this disclosure.

[0140] Figure 6 is a flowchart of a control method provided in some embodiments of this disclosure. The subject executing the method can be an optical fiber sensing system or various devices in the optical fiber sensing system, such as integrated circuits or chips. This disclosure does not limit the subject to these limitations.

[0141] As shown in Figure 6, the control method provided in some embodiments of this disclosure may include the following S601 and S602.

[0142] S601. Obtain the sensing information corresponding to the optical signal.

[0143] Optical signals refer to the backscattered signals generated when light emitted by a light source is backscattered by the sensing fiber. These backscattered signals are generated by the normally functioning segment of the sensing fiber. Once a break occurs in the sensing fiber, the broken section will no longer generate backscattered signals after power is cut off. The sensing information corresponding to the optical signal includes whether there is a break in the sensing optical path or not.

[0144] In some embodiments, the presence of a break in the sensing optical path can be determined based on the actual number of sampling points corresponding to the backscattered signal and a preset number of sampling points. If the actual number of sampling points in the first sensing optical path is less than the preset number of sampling points, then a break in the first sensing optical path is determined to exist. If the actual number of sampling points in the second sensing optical path is equal to the preset number of sampling points, then a break in the second sensing optical path is determined to exist.

[0145] S602. Adjust the sampling frequency of the detection and acquisition device according to the sensing information corresponding to the optical signal.

[0146] In some embodiments, adjusting the sampling frequency of the detection and acquisition device based on the sensing information corresponding to the optical signal may include: increasing the sampling frequency of the detection and acquisition device corresponding to the at least one sensing optical path without a break in the sensing information of the optical signal, so as to increase the actual number of sampling points in the at least one sensing optical path without a break.

[0147] By increasing the actual number of sampling points in at least one sensing optical path without breakpoints, the sum of the actual sampling points of all sensing optical paths can be matched with the sum of the preset sampling points of all sensing optical paths.

[0148] In one possible implementation, if there is a break in at least one sensing optical path, the detection and acquisition device corresponding to the at least one sensing optical path with the break is configured to stop sampling, and the detection and acquisition device corresponding to the at least one sensing optical path without the break is configured to increase the sampling frequency so that the sum of the actual sampling points of all sensing optical paths without the break matches the sum of the preset sampling points of all sensing optical paths.

[0149] For example, if the sensing information indicates a break in the first sensing optical path but no break in the second sensing optical path, sampling of the first sensing optical path can be stopped, and the sampling frequency of the second sensing optical path can be increased until the actual number of sampling points of the second detection and acquisition device equals the sum of the preset number of sampling points of the second detection and acquisition device and the preset number of sampling points of the first detection and acquisition device.

[0150] In another possible implementation, if there is a break in at least one sensing optical path, the detection and acquisition device corresponding to the at least one sensing optical path with the break is configured to maintain sampling operation, and the detection and acquisition device corresponding to the at least one sensing optical path without the break is configured to increase the sampling frequency so that the sum of the actual sampling points of all sensing optical paths matches the sum of the preset sampling points of all sensing optical paths.

[0151] In some embodiments, when there is a break in at least one sensing optical path, the detection and acquisition device corresponding to the at least one sensing optical path with the break is configured to maintain sampling operation, and the detection and acquisition device corresponding to the at least one sensing optical path without the break is configured to maintain the original sampling frequency in the first time interval of the sampling period and to increase the sampling frequency in the second time interval of the sampling period, so that the sum of the actual sampling points of all sensing optical paths matches the sum of the preset sampling points of all sensing optical paths.

[0152] The duration of the first time interval is twice the duration of the breakpoint detection, which is the time it takes for light to travel from the starting point of the sensing optical path to the breakpoint. The second time interval is the time interval in the sampling period other than the first time interval.

[0153] For example, if the sensing information indicates a break in the second sensing optical path but no break in the first sensing optical path, then the preset number of sampling points in the second sensing optical path before the break can be maintained, and the sampling frequency of the first sensing optical path can be increased until the actual number of sampling points of the first detection and acquisition device equals the sum of the preset number of sampling points of the first detection and acquisition device before the increase and the preset number of sampling points of the second detection and acquisition device after the break.

[0154] In some embodiments, the control method may further include: outputting a breakpoint alarm message to an alarm device when the sensing information of the optical signal indicates that at least one sensing optical path has a breakpoint.

[0155] It should be noted that a detailed description of the output breakpoint alarm information can be found in the description of the power failure alarm device outputting to the alarm device in Figure 4 above, which will not be repeated here.

[0156] The following provides an exemplary description of the workflow of the fiber optic sensing system provided in the embodiments of this disclosure.

[0157] As shown in Figures 4 and 7, these are flowcharts of fiber optic sensing systems provided in some embodiments of this disclosure. The workflow may include the following steps S701-S710.

[0158] S701 and light source 250 emit periodic pulse laser signals with specific pulse width and intensity.

[0159] S702 and beam splitter 260 split the pulsed laser signal into two beams.

[0160] For example, the two beams include beam 1 and beam 2.

[0161] S703, the first circulator 221 transmits the received beam 1 to the first sensing fiber 222, and the second circulator 231 transmits the received beam 2 to the second sensing fiber 232.

[0162] S704, the first circulator 221 receives the backscattered signal generated by the first sensing fiber 222, and the second circulator 231 receives the backscattered signal generated by the second sensing fiber 232.

[0163] In some embodiments, when beam 1 passes through the first sensing fiber 222, it generates a backscattered signal, which is modulated by external physical quantities affecting the first sensing fiber 222. When beam 2 passes through the second sensing fiber 232, it generates a backscattered signal, which is modulated by external physical quantities affecting the second sensing fiber 232.

[0164] Taking temperature as an example, when beam 1 passes through the first sensing fiber 222, if the external temperature of the first sensing fiber 222 is higher than the normal temperature, the temperature will affect the backscattered signal generated by the first sensing fiber 222, causing the backscattered signal to be modulated. The modulated backscattered signal will then re-enter the first circulator 221.

[0165] Taking temperature as an example, when beam 2 passes through the second sensing fiber 232, if the external temperature of the second sensing fiber 232 is higher than the normal temperature, the temperature will affect the backscattered signal generated by the second sensing fiber 232, causing the backscattered signal to be modulated. The modulated backscattered signal will then re-enter the second circulator 231.

[0166] S705, the first detection and acquisition device 210 acquires the modulated backscattered signal sent by the first sensing fiber 222 and converts it into a digital signal; the second detection and acquisition device 240 acquires the modulated backscattered signal sent by the second sensing fiber 232 and converts it into a digital signal.

[0167] For example, after the detection and acquisition device acquires the modulated backscattered signal, it can first convert the optical signal into an electrical signal, and then convert the electrical signal into a digital signal.

[0168] S706, the signal processing device 270 analyzes the digital signal obtained by the first detection and acquisition device 210 into a first physical quantity, and analyzes the digital signal obtained by the second detection and acquisition device 240 into a second physical quantity.

[0169] In some embodiments, the signal processing device 270 can analyze the digital signal of each sampling point in the actual sampling points collected by the detection and acquisition device to obtain its corresponding physical quantity.

[0170] For example, the signal processing device 270 can analyze the digital signal converted from the backscattered signal of each sampling point in the actual sampling points collected by the detection and acquisition device to obtain the temperature value modulated by the backscattered signal.

[0171] S707, Controller 280 determines whether the first sensing optical path 220 and the second sensing optical path 230 are malfunctioning. If yes, then execute S708; if no, then execute S710.

[0172] In some embodiments, the controller 280 can determine whether an optical path is malfunctioning based on the actual number of sampling points for each optical path and the preset number of sampling points.

[0173] In step S708, controller 280 determines whether the sum of the sampling frequencies of the first detection and acquisition device 210 and the second detection and acquisition device 240 matches the preset sampling frequency. If not, step S709 is executed; if yes, step S710 is executed.

[0174] In some embodiments, the preset sampling frequency is the sum of the rated sampling frequencies of the first detection and acquisition device 210 and the second detection and acquisition device 240.

[0175] Sampling frequency refers to the number of times a detection and acquisition device takes samples within a fixed optical path length. The higher the sampling frequency, the more samples the detection and acquisition device takes within the fixed optical path length. Conversely, the lower the sampling frequency, the fewer samples the detection and acquisition device takes within the fixed optical path length.

[0176] S709: After the controller 280 adjusts the sampling frequency of the first detection and acquisition device 210 or the second detection and acquisition device 240, it executes S705.

[0177] In some embodiments, after an optical path break occurs, if the sum of the sampling frequency of the first detection and acquisition device 210 and the sampling frequency of the second detection and acquisition device 240 is less than a preset sampling frequency, a control signal can be sent to the detection and acquisition device corresponding to the optical path without a break to increase the sampling frequency of the detection and acquisition device.

[0178] In one example, after the first sensing optical path 220 is interrupted, if the sum of the sampling frequency of the first detection and acquisition device 210 and the sampling frequency of the second detection and acquisition device 240 is less than a preset sampling frequency, a first control signal can be sent to the second detection and acquisition device 240.

[0179] The first control signal is configured to increase the sampling frequency of the second detection and acquisition device 240.

[0180] In another example, after the second sensing optical path 230 is interrupted, if the sum of the sampling frequency of the first detection and acquisition device 210 and the sampling frequency of the second detection and acquisition device 240 is less than the preset sampling frequency, a second control signal can be sent to the first detection and acquisition device 210.

[0181] The second control signal is configured to increase the sampling frequency of the first detection and acquisition device 210.

[0182] If the sum of the sampling frequency of the first detection and acquisition device 210 and the sampling frequency of the second detection and acquisition device 240 is less than the preset sampling frequency after the optical path is interrupted, a control signal can be sent to the detection and acquisition device corresponding to the optical path where the interruption occurred to shut down the detection and acquisition device. At the same time, a control signal can be sent to the detection and acquisition device corresponding to the optical path where the interruption did not occur to increase the sampling frequency of the detection and acquisition device.

[0183] In one example, after the first sensing optical path 220 is interrupted, if the sum of the sampling frequency of the first detection and acquisition device 210 and the sampling frequency of the second detection and acquisition device 240 is less than a preset sampling frequency, a third control signal can be sent to the first detection and acquisition device 210 and a first control signal can be sent to the second detection and acquisition device 240.

[0184] The third control signal is configured to shut down the first detection and acquisition device 210.

[0185] In another example, after the second sensing optical path 230 is interrupted, if the sum of the sampling frequency of the first detection and acquisition device 210 and the sampling frequency of the second detection and acquisition device 240 is less than the preset sampling frequency, a fourth control signal can be sent to the second detection and acquisition device 240 and a second control signal can be sent to the first detection and acquisition device 210.

[0186] The fourth control signal is configured to shut down the second detection and acquisition device 240.

[0187] S710 and controller 280 output the first physical quantity, the second physical quantity, the operating status of the first sensing optical path 220 and the second sensing optical path 230, and the sampling frequency of the first detection and acquisition device 210 and the second detection and acquisition device 240.

[0188] The operation status of the first sensing optical path 220 and the second sensing optical path 230 includes whether the first sensing optical path 220 or the second sensing optical path 230 has a breakpoint, and if a breakpoint occurs, the first breakpoint position of the first sensing optical path 220 or the second breakpoint position of the second sensing optical path 230.

[0189] In one possible implementation, when the first sensing optical path 220 and the second sensing optical path 230 are functioning normally, the controller 280 outputs the first physical quantity and the second physical quantity, as well as the sampling frequency of the first detection and acquisition device 210 and the second detection and acquisition device 240.

[0190] In another possible implementation, when a break occurs in the first sensing optical path 220, the controller 280 outputs a first physical quantity and a second physical quantity, as well as the location of the first break and the sampling frequency of the first detection and acquisition device 210 and the second detection and acquisition device 240.

[0191] In another possible implementation, when a break occurs in the second sensing optical path 230, the controller 280 outputs a first physical quantity and a second physical quantity, as well as the location of the second break and the sampling frequency of the first detection and acquisition device 210 and the second detection and acquisition device 240.

[0192] Thus, some embodiments of this disclosure, by setting up two redundant optical paths, can split the optical signal emitted by the light source into two beams for separate processing. This ensures that even if one optical path fails, data processing can still proceed normally through the other, improving the safety and reliability of the fiber optic sensing system. Furthermore, by setting up a detection and acquisition device for each optical path to collect the actual number of sampling points on both paths, the system can determine whether a fault exists in either path, enabling timely repair of the fault location and further enhancing the safety and reliability of the fiber optic sensing system.

[0193] As shown in S707 above, the controller 280 can determine whether the optical path is malfunctioning based on the actual number of sampling points and the preset number of sampling points for each optical path.

[0194] The following will provide two solutions for the controller 280 to determine whether the optical path is abnormal, based on the embodiments shown in Figures 8 and 9.

[0195] In some embodiments, as shown in FIG8, one way to determine whether the optical path is abnormal may include the following steps S801-S804.

[0196] S801, receive the actual number of sampling points of the first sensing optical path 220 and the actual number of sampling points of the second sensing optical path 230 sent by the signal processing device 270.

[0197] S802. Determine whether the actual number of sampling points corresponding to the first sampling data is equal to the preset number of sampling points of the first sensing optical path 220, and whether the actual number of sampling points corresponding to the second sampling data is equal to the preset number of sampling points of the second sensing optical path 230. If yes, execute S803; if no, execute S804.

[0198] In one possible implementation, if the actual number of sampling points corresponding to the first sampling data is equal to the preset number of sampling points of the first sensing optical path 220, the first sensing optical path 220 is determined to be normal.

[0199] For example, if the preset number of sampling points for the first sensing optical path 220 is 5, and the actual number of sampling points for the first sensing optical path 220 is 5, it indicates that the first sensing optical path 220 has not experienced any breakpoints and is functioning normally.

[0200] In another possible implementation, if the actual number of sampling points corresponding to the second sampling data is equal to the preset number of sampling points of the second sensing optical path 230, the second sensing optical path 230 is determined to be normal.

[0201] For example, if the preset number of sampling points for the second sensing optical path 230 is 5, and the actual number of sampling points for the second sensing optical path 230 is 5, it indicates that the second sensing optical path 230 has not experienced any breakpoints and is functioning normally.

[0202] In another possible implementation, if the actual number of sampling points corresponding to the first sampling data is not equal to the preset number of sampling points of the first sensing optical path 220, it is determined that the first sensing optical path 220 has a breakpoint.

[0203] For example, if the preset number of sampling points for the first sensing optical path 220 is 5, and the actual number of sampling points for the first sensing optical path 220 is 3, it indicates that the first sensing optical path 220 has a breakpoint, and the sampling points after the breakpoint cannot be sampled to obtain data.

[0204] In another possible implementation, if the actual number of sampling points corresponding to the second sampling data is not equal to the preset number of sampling points of the second sensing optical path 230, it is determined that the second sensing optical path 230 has a breakpoint.

[0205] For example, if the preset number of sampling points for the second sensing optical path 230 is 5, and the actual number of sampling points for the second sensing optical path 230 is 4, it indicates that a break has occurred in the second sensing optical path 230, and data cannot be obtained from the sampling points after the break.

[0206] S803, the first optical sensing path 220 and the second optical sensing path 230 are normal, execute S710.

[0207] In some embodiments, if the actual number of sampling points corresponding to the first sampling data is equal to the preset number of sampling points of the first sensing optical path 220, and the actual number of sampling points corresponding to the second sampling data is equal to the preset number of sampling points of the second sensing optical path 230, then the first sensing optical path 220 and the second sensing optical path 230 are determined to be normal.

[0208] For example, if the preset number of sampling points for the first sensing optical path 220 and the preset number of sampling points for the second sensing optical path 230 are both 5, and the actual number of sampling points for the first sensing optical path 220 is 5 and the actual number of sampling points for the second sensing optical path 230 is also 5, it indicates that neither the first sensing optical path 220 nor the second sensing optical path 230 has experienced any breakpoints, and both the first sensing optical path 220 and the second sensing optical path 230 are normal.

[0209] S804, if a break occurs in the first sensing optical path 220 or the second sensing optical path 230, execute S708.

[0210] In some embodiments, as shown in FIG9, another way to determine whether the optical path is abnormal may include the following steps S901-S904.

[0211] S901, Receive the actual number of sampling points of the first sensing optical path 220 and the actual number of sampling points of the second sensing optical path 230 sent by the signal processing device 270.

[0212] S902. Determine whether the difference between the actual number of sampling points corresponding to the first sampling data and half of the preset number of sampling points is less than 1, and whether the difference between the actual number of sampling points corresponding to the second sampling data and half of the preset number of sampling points is less than 1. If yes, proceed to S903; otherwise, proceed to S904.

[0213] The preset number of sampling points is the sum of the preset number of sampling points of the first sensing optical path 220 and the preset number of sampling points of the second sensing optical path 230.

[0214] In one possible implementation, if the difference between the actual number of sampling points corresponding to the first sampling data and the preset number of sampling points is less than or equal to 1, the first sensing optical path 220 is determined to be normal.

[0215] For example, if the preset number of sampling points is 7, and the actual number of sampling points for the first sensing optical path 220 is 3, then 7 / 2 = 3.5, and |3-3.5| < 1, which indicates that the first sensing optical path 220 has not experienced a break and is functioning normally.

[0216] In another possible implementation, if the difference between the actual number of sampling points corresponding to the second sampling data and the preset number of sampling points is less than or equal to 1, the second sensing optical path 230 is determined to be normal.

[0217] For example, if the preset number of sampling points is 7, and the actual number of sampling points for the second sensing optical path 230 is 4, then 7 / 2 = 3.5, and |4-3.5| < 1, which indicates that the second sensing optical path 230 has not experienced any breakpoints and is functioning normally.

[0218] In another possible implementation, if the difference between the actual number of sampling points corresponding to the first sampling data and the preset number of sampling points is greater than 1, it is determined that the first sensing optical path 220 has a breakpoint.

[0219] For example, if the preset number of sampling points is 7, and the actual number of sampling points for the first sensing optical path 220 is 2, then 7 / 2 = 3.5, and |2-3.5| > 1, which indicates that the first sensing optical path 220 has a breakpoint, and the sampling points after the breakpoint cannot be sampled to obtain data.

[0220] In another possible implementation, if the difference between the actual number of sampling points corresponding to the second sampling data and the preset number of sampling points is greater than 1, it is determined that the second sensing optical path 230 has a breakpoint.

[0221] For example, if the preset number of sampling points is 7, and the actual number of sampling points for the second sensing optical path 230 is 1, then 7 / 2 = 3.5, and |1-3.5|>1, which indicates that the second sensing optical path 230 has a breakpoint, and the sampling points after the breakpoint cannot be sampled to obtain data.

[0222] S903, the first optical sensor path 220 and the second optical sensor path 230 are normal, execute S710.

[0223] In some embodiments, if the difference between the actual number of sampling points corresponding to the first sampling data and the preset number of sampling points is less than or equal to 1, and the difference between the actual number of sampling points corresponding to the second sampling data and the preset number of sampling points is less than or equal to 1, it is determined that the first sensing optical path 220 and the second sensing optical path 230 are normal.

[0224] For example, if the preset number of sampling points is 7, and the actual number of sampling points for the first sensing optical path 220 is 3 and the actual number of sampling points for the second sensing optical path 230 is 4, then 7 / 2 = 3.5, |3-3.5| < 1, |4-3.5| < 1, which indicates that neither the first sensing optical path 220 nor the second sensing optical path 230 has a breakpoint, and both the first sensing optical path 220 and the second sensing optical path 230 are normal.

[0225] S904, if a break occurs in the first sensing optical path 220 or the second sensing optical path 230, execute S708.

[0226] Thus, some embodiments of this disclosure can quickly determine whether there is a break in the optical path by comparing whether the actual number of sampling points is equal to the preset number of sampling points, thereby improving the efficiency of break detection.

[0227] As described in S708 above, the controller 280 can determine whether the sum of the sampling frequencies of the first detection and acquisition device 210 and the second detection and acquisition device 240 matches the preset sampling frequency.

[0228] The following section, in conjunction with the embodiment shown in Figure 10, will provide a solution for the controller 280 to determine whether the sampling frequency is matched.

[0229] In some embodiments, as shown in FIG10, the method for determining whether the sampling frequencies match may include the following steps S1001-S1003.

[0230] S1001. Determine whether the difference between the preset number of sampling points and the sum of the actual number of sampling points corresponding to the first sampling data and the actual number of sampling points corresponding to the second sampling data is equal to 0. If yes, proceed to S1002; if no, proceed to S1003.

[0231] The preset number of sampling points is the sum of the preset number of sampling points of the first sensing optical path 220 and the preset number of sampling points of the second sensing optical path 230.

[0232] In one example, with a preset number of sampling points of 7, if the actual number of sampling points for the first sensing optical path 220 is 3 and the actual number of sampling points for the second sensing optical path 230 is 4, then 7-(4+3)=0, indicating that the sum of the sampling frequencies of the first detection and acquisition device 210 and the second detection and acquisition device 240 matches the preset sampling frequency.

[0233] In another example, with a preset sampling number of 7, if the actual sampling number for the first sensing optical path 220 is 1 and the actual sampling number for the second sensing optical path 230 is 6, then 7-(1+6)=0, which indicates that the sum of the sampling frequencies of the first detection and acquisition device 210 and the second detection and acquisition device 240 matches the preset sampling frequency.

[0234] In another example, with a preset number of sampling points of 7, if the actual number of sampling points for the first sensing optical path 220 is 2 and the actual number of sampling points for the second sensing optical path 230 is 3, then 7-(2+3)≠1, indicating that the sum of the sampling frequencies of the first detection and acquisition device 210 and the second detection and acquisition device 240 does not match the preset sampling frequency.

[0235] S1002, the sum of the sampling frequencies of the first detection and acquisition device 210 and the second detection and acquisition device 240 matches the preset sampling frequency.

[0236] S1003, the sum of the sampling frequencies of the first detection and acquisition device 210 and the second detection and acquisition device 240 does not match the preset sampling frequency.

[0237] Thus, some embodiments of this disclosure quickly determine whether the sampling frequency matches the current situation by comparing whether the sum of the actual sampling points of the two optical paths is equal to the total preset sampling points, thereby improving the efficiency of determining the sampling frequency.

[0238] As described in S710 above, in another possible implementation, when the first sensing optical path 220 is interrupted, the controller 280 outputs the first physical quantity and the second physical quantity, as well as the first interruption position, the sampling frequency of the first detection and acquisition device 210 and the second detection and acquisition device 240.

[0239] In some embodiments, before outputting the first breakpoint position, the controller 280 also needs to determine the first breakpoint position based on the position of the last sampling point in the actual sampling points corresponding to the first sampling data.

[0240] As shown in Figure 11, taking the preset number of sampling points of the first sensing optical path 220 as 4 as an example, if the actual number of sampling points collected by the first detection and acquisition device 210 is 2, it indicates that the first break point is located between the second and third rated sampling points of the first sensing optical path 220.

[0241] In some embodiments, after determining that the first breakpoint is located between the second and third rated sampling points of the first sensing optical path 220, the sampling frequency of the second sensing optical path 230 by the second detection and acquisition device 240 can be increased until the sum of the actual sampling points of the first sensing optical path 220 and the second sensing optical path 230 equals the total preset sampling point number.

[0242] As shown in Figure 11, taking the preset sampling points of the first sensing optical path 220 as 4 and the preset sampling points of the second sensing optical path 230 as 4, when the first break point is located between the second rated sampling point A and the third rated sampling point B of the first sensing optical path 220, since there are two more sampling points after the first break point, it is necessary to increase the sampling frequency of the second detection and acquisition device 240 on the second sensing optical path 230 to acquire 6 sampling points.

[0243] In some embodiments, after determining that the first breakpoint is located between the second and third rated sampling points of the first sensing optical path 220, the sampling frequency of the second sensing optical path 230 by the first detection and acquisition device can be turned off and the sampling frequency of the second detection and acquisition device 240 on the second sensing optical path 230 can be increased until the sum of the actual sampling points of the first sensing optical path 220 and the second sensing optical path 230 equals the total preset sampling points.

[0244] As shown in Figure 12, taking the preset sampling points of the first sensing optical path 220 as 4 and the preset sampling points of the second sensing optical path 230 as 4 as an example, after determining that the first sensing optical path 220 has a breakpoint, the first detection and acquisition device can be turned off, and the sampling frequency of the second detection and acquisition device 240 on the second sensing optical path 230 can be increased to collect 8 sampling points.

[0245] As described in S710 above, in another possible implementation, when the second sensing optical path 230 is interrupted, the controller 280 outputs the first physical quantity and the second physical quantity, as well as the second interruption position, the sampling frequency of the first detection and acquisition device 210 and the second detection and acquisition device 240.

[0246] In some embodiments, before outputting the second breakpoint position, the controller 280 also needs to determine the second breakpoint position based on the position of the last sampling point in the actual sampling points corresponding to the second sampling data.

[0247] As shown in Figure 13, taking the preset number of sampling points of the second sensing optical path 230 as 5 as an example, if the actual number of sampling points collected by the second detection and acquisition device 240 is 3, it indicates that the second breakpoint is located between the third and fourth rated sampling points of the second sensing optical path 230.

[0248] In some embodiments, after determining that the second breakpoint is located between the third and fourth rated sampling points of the second sensing optical path 230, the sampling frequency of the first sensing optical path 220 by the first detection and acquisition device 210 can be increased until the sum of the actual sampling points of the first sensing optical path 220 and the second sensing optical path 230 equals the total preset sampling points.

[0249] As shown in Figure 13, with the preset sampling points of the first sensing optical path 220 and the second sensing optical path 230 both set at 5, and the second break point being located between the third rated sampling point C and the fourth rated sampling point D of the second sensing optical path 230, since there are two more sampling points after the second break point, it is necessary to increase the sampling frequency of the first detection and acquisition device 210 on the first sensing optical path 220 to collect 7 sampling points.

[0250] In some embodiments, after determining that the second breakpoint is located between the third and fourth rated sampling points of the second sensing optical path 230, the second detection and acquisition device can be turned off and the sampling frequency of the first detection and acquisition device 210 on the first sensing optical path 220 can be increased until the sum of the actual sampling points of the first sensing optical path 220 and the second sensing optical path 230 equals the total preset sampling points.

[0251] As shown in Figure 14, taking the preset sampling points of the first sensing optical path 220 as 5 and the preset sampling points of the second sensing optical path 230 as 5 as an example, after determining that the second sensing optical path 230 has a breakpoint, the second detection and acquisition device can be turned off, and the sampling frequency of the first detection and acquisition device 210 on the first sensing optical path 220 can be increased to 10 sampling points.

[0252] Thus, on the one hand, some embodiments of this disclosure can determine the breakpoint location by using the position of the last sampling point to obtain sampled data, which is located between the last sampling point and the next sampling point, improving the accuracy of determining the breakpoint location. On the other hand, some embodiments of this disclosure, after determining that a breakpoint has occurred in one sensing optical path, increase the sampling frequency of the other sensing optical path to maintain the total number of sampling points for both sensing optical paths at a normal level, ensuring that the fiber optic sensing system can still operate normally, thereby improving the reliability of the fiber optic sensing system. Furthermore, some embodiments of this disclosure, after determining that a breakpoint has occurred in one sensing optical path, can also directly shut down the sampling frequency of that sensing optical path and increase the sampling frequency of the other sensing optical path, still maintaining the total number of sampling points for both sensing optical paths at a normal level, ensuring that the fiber optic sensing system can still operate normally, and improving the reliability of the fiber optic sensing system.

[0253] As shown in Figure 15, some embodiments of this disclosure provide an electronic device 1500, which includes a processor 1502 and a communication interface 1503. The processor 1502 is configured to control and manage the operation of the electronic device 1500. The communication interface 1503 is configured to support communication between the electronic device 1500 and other network entities. The electronic device 1500 may also include a memory 1501 and a bus 1504. The memory 1501 is configured to store program code and data of the electronic device 1500, for example, a computer program that can run on the processor 1502 is stored on the memory 1501.

[0254] The memory 1501 may be the memory in the electronic device 1500, and the memory may include volatile memory, such as random access memory. The memory may also include non-volatile memory, such as read-only memory, flash memory, hard disk, or solid-state drive. The memory may also include combinations of the above types of memory.

[0255] The processor 1502 described above may implement or execute various exemplary logic blocks, modules, and circuits described in conjunction with some embodiments of this disclosure. The processor may be a central processing unit, a general-purpose processor, a digital signal processor, an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It may implement or execute various exemplary logic blocks, modules, and circuits described in conjunction with some embodiments of this disclosure. The processor may also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of a DSP and a microprocessor, etc.

[0256] Bus 1504 can be an extended industry standard architecture (EISA) bus, etc. Bus 1504 can be divided into address bus, data bus, control bus, etc. For ease of illustration, only one thick line is used to represent it in Figure 15, but this does not mean that there is only one bus or one type of bus.

[0257] Through the above description of the embodiments, those skilled in the art will clearly understand that, for the sake of convenience and brevity, only the division of the above functional modules is used as an example. In practical applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above. The working process of the system, device, and device described above can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0258] This disclosure provides a computer program product containing instructions that, when run on a computer, cause the computer to perform the control method described in the above method embodiments.

[0259] Some embodiments of this disclosure also provide a computer-readable storage medium storing instructions that, when executed on a computer, cause the computer to perform the control method in the method flow shown in the above method embodiments.

[0260] Computer-readable storage media can be, for example, but not limited to, electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatuses, or devices, or any combination thereof. Computer-readable storage media can (a non-exhaustive list) include: electrical connections having one or more wires; portable computer disks; hard disks; random access memory (RAM); read-only memory (ROM); erasable programmable read-only memory (EPROM); registers; hard disks; optical fibers; compact disc read-only memory (CD-ROM); optical storage devices; magnetic storage devices; or any suitable combination thereof; or any other form of computer-readable storage media known in the art. An exemplary storage medium is coupled to a processor, enabling the processor to read information from and write information to the storage medium. Of course, the storage medium can also be a component of the processor. The processor and the storage medium can reside in an application-specific integrated circuit (ASIC). In this embodiment of the disclosure, the computer-readable storage medium can be any tangible medium that contains or stores a program that can be used by or in conjunction with an instruction execution system, apparatus, or device.

[0261] Some embodiments of this disclosure also provide a computer program product containing instructions that, when executed on a computer, cause the computer to perform the control method described in Figures 6 to 10.

[0262] Since the electronic devices, computer-readable storage media, and computer program products in some embodiments of this disclosure can be applied to the above methods, the technical effects they can achieve can also be referred to the above method embodiments, and this disclosure will not repeat them here.

[0263] In the several embodiments provided in this disclosure, it should be understood that the disclosed systems and vehicles can be implemented in other ways. For example, the device embodiments described above are merely illustrative; for instance, the division of the devices is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple devices or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the mutual coupling or direct coupling or communication connection shown or discussed may be indirect coupling or communication connection through some interfaces, devices, or apparatuses, and may be electrical, mechanical, or other forms.

[0264] The devices described as separate components may or may not be physically separate. The components shown as devices may or may not be physical devices; that is, they may be located in one place or distributed across multiple network devices. Some or all of the devices can be selected to achieve the purpose of this embodiment according to actual needs.

[0265] In addition, the functional devices in the various embodiments of this disclosure can be integrated into a processing device, or each device can exist physically separately, or two or more devices can be integrated into a device.

[0266] The above are merely specific embodiments of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A fiber optic sensing system (200), comprising: At least two sensing optical paths; as well as At least one detection and acquisition device, wherein each of the at least two sensing optical paths is connected to the detection and acquisition device; The detection and acquisition device is configured to acquire optical signals in each of the sensing optical paths.

2. The optical fiber sensing system (200) of claim 1, wherein, The at least one detection and acquisition device includes at least two detection and acquisition devices, and each sensing optical path is connected to the corresponding detection and acquisition device among the at least two detection and acquisition devices.

3. The fiber optic sensing system (200) according to claim 1 or 2 further includes a beam splitter, the beam splitter including an input port and at least two output ports, wherein, The input port is configured to connect to a light source, and each sensing optical path is connected to one of the corresponding output ports of the at least two output ports of the beam splitter. The beam splitter is configured to split the optical signal generated by the light source into at least two optical signals and output them to the corresponding sensing optical paths respectively.

4. The fiber optic sensing system (200) according to claim 3, wherein, The sensing optical path includes a coupler and a sensing optical fiber. The first port of the coupler is connected to one of the corresponding output ports of the at least two output ports of the splitter. The second port of the coupler is connected to the sensing optical fiber. The third port of the coupler is connected to at least one of the at least two detection and acquisition devices. The sensing fiber is configured to receive the optical signal output by the coupler and generate a backscattered signal. The coupler is configured to receive the backscattered signal and output it to the at least one detection and acquisition device.

5. The fiber optic sensing system (200) according to claim 4, wherein, The coupler is a circulator.

6. The fiber optic sensing system (200) according to any one of claims 3 to 5 further includes the light source.

7. The fiber optic sensing system (200) according to any one of claims 2 to 6, wherein, In the event that at least one of the at least two sensing optical paths has a breakpoint, the detection and acquisition device corresponding to the at least one sensing optical path without a breakpoint is configured to increase the sampling frequency in order to increase the actual number of sampling points in the at least one sensing optical path without a breakpoint.

8. The fiber optic sensing system (200) according to claim 7, wherein, If at least one of the at least two sensing optical paths has a breakpoint, the detection and acquisition device corresponding to the at least one sensing optical path without a breakpoint is configured to increase the sampling frequency so that the sum of the actual sampling points of all at least two sensing optical paths matches the sum of the preset sampling points of all at least two sensing optical paths.

9. The fiber optic sensing system (200) according to claim 8, wherein, If at least one of the at least two sensing optical paths has a breakpoint, the detection and acquisition device corresponding to the at least one sensing optical path with a breakpoint is configured to stop sampling, and the detection and acquisition device corresponding to the at least one sensing optical path without a breakpoint is configured to increase the sampling frequency so that the sum of the actual sampling points of all the at least one sensing optical paths without breakpoints matches the sum of the preset sampling points of all the at least two sensing optical paths.

10. The fiber optic sensing system (200) according to claim 8, wherein, If at least one of the at least two sensing optical paths has a breakpoint, the detection and acquisition device corresponding to the at least one sensing optical path with a breakpoint is configured to maintain sampling operation, and the detection and acquisition device corresponding to the at least one sensing optical path without a breakpoint is configured to increase the sampling frequency so that the sum of the actual sampling points of all at least two sensing optical paths matches the sum of the preset sampling points of all at least two sensing optical paths.

11. The fiber optic sensing system (200) according to claim 10, wherein, When at least one of the at least two sensing optical paths has a breakpoint, the detection and acquisition device corresponding to the at least one sensing optical path with the breakpoint is configured to maintain sampling operation. The detection and acquisition device corresponding to the at least one sensing optical path without a breakpoint is configured to maintain the original sampling frequency during the first time interval of the sampling period and to increase the sampling frequency during the second time interval of the sampling period, so that the sum of the actual sampling points of all at least two sensing optical paths matches the sum of the preset sampling points of all at least two sensing optical paths.

12. The fiber optic sensing system (200) according to claim 11, wherein, The duration of the first time interval is twice the breakpoint detection duration, which is the time it takes for light to travel from the starting point of the sensing optical path where the breakpoint exists to the breakpoint. The second time interval is the time interval in the sampling period other than the first time interval.

13. The fiber optic sensing system (200) according to any one of claims 7 to 12, wherein, If the actual number of sampling points of the optical signal collected by the detection and acquisition device corresponding to any of the at least two sensing optical paths is lower than the preset number of sampling points corresponding to the sensing optical path, then there is a break in the sensing optical path.

14. The fiber optic sensing system (200) according to any one of claims 1 to 13 further includes a controller connected to the detection and acquisition device; The controller is configured to receive sensing information corresponding to the optical signal fed back by the detection and acquisition device.

15. The fiber optic sensing system (200) according to claim 14, wherein, The controller is also configured to adjust the sampling frequency of the detection and acquisition device according to the sensing information corresponding to the optical signal.

16. The fiber optic sensing system (200) according to claim 14 or 15, wherein, The controller is also configured to output a breakpoint alarm message to an alarm device if a breakpoint exists in any of the at least two sensing optical paths.

17. The fiber optic sensing system (200) according to any one of claims 14 to 16 further includes a signal processing device connected between the detection and acquisition device and the controller.

18. A control method applied to an optical fiber sensing system (200) according to any one of claims 1 to 17, the method comprising: The sampling frequency of the detection and acquisition device is adjusted according to the sensing information corresponding to the optical signal.

19. The method according to claim 18, wherein, The step of adjusting the sampling frequency of the detection and acquisition device based on the sensing information corresponding to the optical signal includes: When the sensing information of the optical signal indicates that at least one of the at least two sensing optical paths has a breakpoint, the sampling frequency of the detection and acquisition device corresponding to the at least one sensing optical path without a breakpoint is increased to increase the actual number of sampling points in the at least one sensing optical path without a breakpoint.

20. The method according to claim 19, wherein, Increasing the sampling frequency of the detection and acquisition device corresponding to at least one sensing optical path without breakpoints, so as to increase the actual number of sampling points in the at least one sensing optical path without breakpoints, includes: Increase the sampling frequency of the detection and acquisition device corresponding to at least one of the sensor optical paths without breakpoints, so that the sum of the actual sampling points of all at least two sensor optical paths matches the sum of the preset sampling points of all at least two sensor optical paths.

21. The method according to claim 20, wherein, If at least one of the at least two sensing optical paths has a breakpoint, the detection and acquisition device corresponding to the at least one sensing optical path with a breakpoint is configured to stop sampling, and the detection and acquisition device corresponding to the at least one sensing optical path without a breakpoint is configured to increase the sampling frequency so that the sum of the actual sampling points of all the at least one sensing optical paths without breakpoints matches the sum of the preset sampling points of all the at least two sensing optical paths.

22. The method according to claim 20, wherein, If at least one of the at least two sensing optical paths has a breakpoint, the detection and acquisition device corresponding to the at least one sensing optical path with a breakpoint is configured to maintain sampling operation, and the detection and acquisition device corresponding to the at least one sensing optical path without a breakpoint is configured to increase the sampling frequency so that the sum of the actual sampling points of all at least two sensing optical paths matches the sum of the preset sampling points of all at least two sensing optical paths.

23. The method according to claim 22, wherein, When at least one of the at least two sensing optical paths has a breakpoint, the detection and acquisition device corresponding to the at least one sensing optical path with the breakpoint is configured to maintain sampling operation. The detection and acquisition device corresponding to the at least one sensing optical path without a breakpoint is configured to maintain the original sampling frequency during the first time interval of the sampling period and to increase the sampling frequency during the second time interval of the sampling period, so that the sum of the actual sampling points of all at least two sensing optical paths matches the sum of the preset sampling points of all at least two sensing optical paths.

24. The method according to claim 23, wherein, The duration of the first time interval is twice the breakpoint detection duration, which is the time it takes for light to travel from the starting point of the sensing optical path where the breakpoint exists to the breakpoint. The second time interval is the time interval in the sampling period other than the first time interval.

25. The method according to any one of claims 18 to 24, further comprising: If the sensing information of the optical signal indicates that at least one sensing optical path has a breakpoint, a breakpoint alarm message is output to the alarm device.

26. An electronic device (1500) comprising a processor (1502) connected to a memory (1501) having a computer program stored on the memory (1501) executable on the processor (1502) to implement the method according to any one of claims 18 to 25.

27. A computer-readable storage medium storing instructions, wherein, When the computer executes the instruction, the computer performs the method according to any one of claims 18 to 25.

28. An electronic and electrical system (20) comprising a fiber optic sensing system (200) according to any one of claims 1 to 17 and an alarm device, wherein the fiber optic sensing system (200) is connected to the alarm device.

29. A vehicle (102) comprising a fiber optic sensing system (200) according to any one of claims 1 to 17, or comprising an electronic device (1500) according to claim 26, or comprising an electronic and electrical system (20) according to claim 28.

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