Laser fault detection device and method

Abstract

The present invention discloses a laser fault detection device and method. The fault detection device includes: a controller, N-level fault detection modules, and a power supply detection module. Each level of the fault detection module corresponds to a level of the device to be detected. Each level of the fault detection module includes: a light source detection module for obtaining actual beam information of the laser beam passing through the device to be detected; a reflector assembly; a rotating platform that rotates synchronously with the reflector assembly; and an output mirror assembly for outputting the laser beam. The controller includes an FPGA, an MCU, and a memory. The FPGA contains a neural network model that includes standard beam information of the laser beam corresponding to the N levels of devices to be detected. The MCU controls the rotation of the rotating platform. This invention achieves rapid fault detection by detecting the devices to be detected step by step, and can locate the specific location of the laser fault, thereby improving the efficiency of laser fault troubleshooting.

Description

Technical Field

[0001] The present invention relates to laser technology, and in particular to a laser fault detection device and method. Background Art

[0002] Because lasers have the characteristics of high brightness, high directionality, high monochromaticity and high coherence, they are widely used in information, processing, medical treatment, military and other fields.

[0003] Lasers may experience various faults during use. Troubleshooting is an important part of ensuring the normal operation of the laser. When a laser fails, it is impossible to determine the cause of the failure. If the optical components in the laser are damaged, engineers need to remove the covers and check them one by one. If the devices are too dense, they need to be further disassembled to check whether they are damaged. This will take a lot of time to troubleshoot, increase the cost of troubleshooting, and reduce work efficiency.

[0004] Compared with traditional lasers, they often only detect the parameters of the final output beam to determine whether there is a fault, but cannot further determine the cause, location or specific device of the fault. Summary of the Invention

[0005] The present invention provides a laser fault detection device and method, which enables a light source detection module to perform fault detection on each level of devices to be detected, and detects and analyzes the cause of laser faults, thereby improving the efficiency of laser fault troubleshooting.

[0006] In a first aspect, the present invention provides a laser fault detection device, comprising:

[0007] The laser includes: N levels of devices to be detected;

[0008] The fault detection device includes: a controller, N-level fault detection modules and a power supply detection module, where N is a positive integer; each level of the fault detection module corresponds to a level of the device to be detected; the N-level devices to be detected and the N-level fault detection modules are all communicatively connected to the controller;

[0009] Each level of the fault detection module includes:

[0010] The light source detection module includes but is not limited to a temperature and humidity sensor and a power meter, which is used to obtain the actual beam information of the laser beam passing through the device to be detected; the actual beam information includes but is not limited to the power a N ;

[0011] A reflector assembly, disposed between two adjacent stages of the devices to be detected, and used to guide the laser beam;

[0012] A rotating platform, the reflector assembly is connected to the rotating platform, and the reflector assembly rotates synchronously with the rotating platform;

[0013] an output mirror assembly, arranged behind the rotating platform along the transmission path of the laser beam, and used for leading the laser beam out;

[0014] The controller includes an FPGA, an MCU, and a memory. The FPGA is loaded with a neural network model, and the neural network model includes standard beam information of the laser beam corresponding to the N-level devices to be detected; the MCU is loaded with a control system and controls the rotation of the rotating platform; the memory stores preset data;

[0015] The power detection module is located at the input end of the first-stage device to be detected.

[0016] Optionally, the light source detection module further includes a frequency meter and a beam quality tester, and the actual beam information also includes a pulse width m N , beam quality p N .

[0017] In a second aspect, the present invention provides a method for detecting laser faults.

[0018] The controller controls the light source detection module to detect the actual beam information of the laser beam of the device to be detected in real time, including but not limited to power;

[0019] The controller calculates the rate of change of the power over time based on the power detected in real time to obtain the power change rate;

[0020] When the power change rate is within a first change rate interval, maintaining the current working state of each device;

[0021] When the power change rate is in a second change rate interval, generating a first fault detection result;

[0022] generating a second fault detection result when the power change rate is in a third change rate interval;

[0023] When the power change rate is in the fourth change rate range, the controller controls the rotation of the rotating platform, and at the same time the light source detection module obtains actual light beam information and generates third detection information, and the controller generates a third fault detection result based on the third detection information; wherein, the reflector assembly rotates synchronously with the rotating platform.

[0024] Optionally, the first fault detection result is divided into two situations: a fault exists and no fault exists. When the first fault detection result is no fault exists,

[0025] The controller controls the rotation of the rotating platform, and at the same time the light source detection module obtains actual light beam information and generates third detection information, and the controller generates a third fault detection result according to the third detection information; wherein, the reflector assembly rotates synchronously with the rotating platform.

[0026] Optionally, the second fault detection result is divided into two situations: a fault exists and no fault exists. When the second fault detection result is no fault exists,

[0027] The controller controls the rotation of the rotating platform, and at the same time the light source detection module obtains actual light beam information and generates third detection information, and the controller generates a third fault detection result according to the third detection information; wherein, the reflector assembly rotates synchronously with the rotating platform.

[0028] Optionally, the controller controls the rotating platform to rotate, and at the same time, the light source detection module obtains actual light beam information and generates third detection information, and the controller generates a third fault detection result according to the third detection information. The process includes:

[0029] The controller controls the rotation of the i-th level rotating platform, and the i-th level reflecting mirror assembly rotates synchronously with the i-th level rotating platform, 1≤i≤N;

[0030] The controller controls the light source detection module of the i-th level to detect the actual light beam information passing through the device to be detected of the i-th level, including but not limited to power;

[0031] The controller calculates a deviation percentage between the actual beam information of the i-th level and the standard beam information of the i-th level in the neural network model to generate third detection information;

[0032] The controller generates a third fault detection result according to the third detection information.

[0033] Optionally, when the power change rate is in a second change rate interval, generating a first fault detection result includes:

[0034] When the power change rate is in a second change rate interval, the controller obtains first detection information from the power detection module, and inputs the first detection information into a neural network model to generate a first fault detection result.

[0035] Optionally, the first detection information includes voltage and current.

[0036] Optionally, when the power change rate is in a third change rate interval, generating a second fault detection result includes:

[0037] When the power change rate is in a third change rate interval, the controller obtains second detection information from the light source detection module, and inputs the second detection information into a neural network model to generate a second fault detection result.

[0038] Optionally, the second detection information includes ambient temperature and humidity.

[0039] The present invention provides a laser fault detection device and method, the laser comprising: N-level devices to be detected; the fault detection device comprising: a controller, N-level fault detection modules and a power detection module, wherein N is a positive integer; each level of the fault detection module corresponds to a level of the device to be detected; the N-level devices to be detected and the N-level fault detection modules are all communicatively connected to the controller; each level of the fault detection module comprises: a light source detection module, including but not limited to a temperature and humidity sensor and a power meter, for obtaining actual beam information of the laser beam passing through the device to be detected; the actual beam information includes but is not limited to power a N The reflector assembly is arranged between two adjacent levels of devices to be detected and is used to guide the laser beam. The reflector assembly is connected to the rotating platform and rotates synchronously with the rotating platform. The output mirror assembly is arranged behind the rotating platform along the transmission path of the laser beam and is used to lead out the laser beam. The controller includes an FPGA, an MCU and a memory. The FPGA is loaded with a neural network model, which includes standard beam information of the laser beam corresponding to N levels of devices to be detected. The MCU is loaded with a control system and controls the rotation of the rotating platform. The memory stores preset data. The power detection module is located at the input end of the first level of devices to be detected. The device divides the laser into N levels of devices to be detected through the reflector assembly, and the rotating platform carries the reflector assembly to realize the light source detection module to perform fault detection on each level of devices to be detected. By monitoring the power change rate, the cause of the laser failure can be detected and analyzed, thereby improving the efficiency of laser fault detection.

[0040] It should be understood that the content described in this section is not intended to identify the key or important features of the embodiments of the present invention, nor is it intended to limit the scope of the present invention. Other features of the present invention will become readily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 A schematic structural diagram of a laser and a fault detection device thereof provided by an embodiment of the present invention;

[0042] Figure 2 A schematic diagram of an optical path of a laser fault detection device provided by an embodiment of the present invention;

[0043] Figure 3 A schematic diagram of an optical path of another laser fault detection device provided by an embodiment of the present invention;

[0044] Figure 4 A flowchart of a laser fault detection method provided by an embodiment of the present invention;

[0045] Figure 5 This is a flow chart of another laser fault detection method provided by an embodiment of the present invention.

[0046] 100 - device to be tested; 101 - first level device to be tested; 102 - second level device to be tested; 103 - third level device to be tested; 104 - fourth level device to be tested;

[0047] 1-controller; 11-FPGA; 111-neural network model; 12-MCU; 13-memory;

[0048] 2-Fault detection module;

[0049] 21-light source detection module; 211-first level light source detection module; 212-second level light source detection module; 213-third level light source detection module; 214-fourth level light source detection module;

[0050] 22-reflector assembly; 221-first stage reflector; 222-second stage reflector; 223-third stage reflector; 224-fourth stage reflector;

[0051] 23-rotating platform; 231-first-stage rotating platform; 232-second-stage rotating platform; 233-third-stage rotating platform; 234-fourth-stage rotating platform;

[0052] 24- output mirror assembly; 241- first stage output mirror; 242- second stage output mirror; 242- third stage output mirror; 243- third stage output mirror;

[0053] 3-Power detection module. DETAILED DESCRIPTION

[0054] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It will be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all structures.

[0055] The terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. It should be noted that the directional words such as "upper", "lower", "left", and "right" described in the embodiments of the present invention are described based on the angles shown in the accompanying drawings and should not be understood as limiting the embodiments of the present invention. In addition, in the context, it is also necessary to understand that when it is mentioned that an element is formed "on" or "under" another element, it can not only be formed directly "on" or "under" another element, but can also be formed indirectly "on" or "under" another element through an intermediate element. The terms "first", "second", etc. are only used for descriptive purposes and do not indicate any order, quantity or importance, but are only used to distinguish different components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0056] The term "including" and its variations used in the present invention are open inclusions, that is, "including but not limited to." The term "based on" means "based at least in part on." The term "one embodiment" means "at least one embodiment."

[0057] It should be noted that the concepts such as "first" and "second" mentioned in the present invention are only used to distinguish the corresponding contents, and are not used to limit the order or mutual dependence.

[0058] It should be noted that the modifications of "one" and "multiple" mentioned in the present invention are illustrative rather than restrictive. Those skilled in the art should understand that unless otherwise clearly indicated in the context, it should be understood as "one or more".

[0059] Figure 1 A schematic diagram of the structure of a laser and a fault detection device thereof provided by an embodiment of the present invention is provided. Figure 2 A schematic diagram of an optical path of a laser fault detection device provided by an embodiment of the present invention. Figure 3 A schematic diagram of an optical path of another laser fault detection device provided by an embodiment of the present invention is shown in FIG. Figure 1-Figure 3 As shown, the laser includes: N levels of devices to be detected 100;

[0060] The fault detection device includes: a controller 1, an N-level fault detection module 2, and a power supply detection module 3, where N is a positive integer; each level of the fault detection module 2 corresponds to a level of the device to be detected 100; the N-level devices to be detected 100, the N-level fault detection module 2, and the power supply detection module 3 are all communicatively connected to the controller 1;

[0061] Each level of fault detection module 2 includes:

[0062] The light source detection module 21 includes but is not limited to a temperature and humidity sensor and a power meter, and is used to obtain the actual beam information of the laser beam passing through the device to be detected 100; the actual beam information includes but is not limited to the power a N ;

[0063] A reflector assembly 22 is provided between two adjacent stages of the devices to be detected 100 and is used to guide the laser beam;

[0064] The rotating platform 23 is connected to the reflector assembly 22, and the reflector assembly 22 rotates synchronously with the rotating platform 23;

[0065] The output mirror assembly 24 is arranged behind the rotating platform 23 along the transmission path of the laser beam and is used to guide the laser beam out;

[0066] The controller 1 includes an FPGA 11, an MCU 12, and a memory. The FPGA 11 contains a neural network model 111, which includes standard beam information of the laser beam corresponding to the N-level device to be detected 100. The MCU 12 contains a control system and controls the rotation of the rotating platform 23. The memory 13 stores preset data.

[0067] The power detection module 3 is located at the input end of the first-stage device to be detected 101 .

[0068] Specifically, the controller 1 processes the actual beam information, or fuses the actual beam information with the standard beam information of the neural network model 111 to obtain detection information, and then compares the detection information with the preset value to determine whether a fault occurs and generate a fault detection result.

[0069] In the case where the laser is fault-free, the engineer uses the rotating platform 23 to test the output beam of each level of the device to be tested 100. The obtained standard beam information may include power, and the standard beam information corresponding to each level of the device to be tested 100 is stored in the neural network model 111.

[0070] Furthermore, the light source detection module 21 may also include a frequency meter and a beam quality tester, and the actual beam information may also include the pulse width m N , beam quality p N .

[0071] Exemplary, reference Figure 1 and Figure 2 , Figure 2The laser has four levels of devices to be detected 100. When the laser is operating normally, the fourth-level light source detection module 214 detects the actual beam information of the laser beam passing through the four-level device to be detected 100, such as power, pulse width, beam quality and directivity, etc. The deviation percentage can be calculated by calculating the actual beam information and the standard beam information in the neural network model 111, such as calculating: power deviation percentage, pulse width deviation percentage, beam quality deviation percentage and pointing deviation percentage, etc., and comparing them with their corresponding preset values ​​to determine whether the laser is operating normally. Assuming that the preset values ​​are all 10%, if all values ​​are less than 10%, it is determined that the laser is operating normally. If the deviation percentage of any beam information is greater than or equal to 10%, it is determined that the laser is faulty. When detecting the specific location of the fault of the device to be detected 100, you can refer to Figure 1 and Figure 3 , Figure 3 Taking the detection of the first-level device to be detected 101 and the second-level device to be detected 102 as an example, the second-level rotating platform 232 drives the second-level reflector 222 to rotate, and the laser beam passing through the first-level device to be detected 101 and the second-level device to be detected 102 is reflected out of the original optical path and emitted through the second-level output mirror 242. At this time, the second-level light source detection module 212 detects the actual light beam information at this time, and compares it with the standard light beam information under this cavity shape in the neural network model 111 to determine whether the first two levels of devices to be detected 100 are faulty.

[0072] It should be noted that, in the above comparison with the standard beam information under this cavity shape in the neural network model 111, this cavity type refers to the cavity structure from the first-stage device to be detected 101 and the second-stage device to be detected 102 to the second-stage output mirror 242. The standard beam information of the cavity structure corresponding to all devices to be detected 100 is recorded in the neural network model 111.

[0073] It should also be noted that Figure 3 Taking the detection of the first two levels of devices to be detected 100 as an example, when only the first level of devices to be detected 101 is detected, the first level reflector 221 can be driven to rotate by the first level rotating platform 231, and the laser beam is emitted through the first level output mirror 241. At this time, the first level light source detection module 211 performs detection; similarly, when detecting the first three levels of devices to be detected 100, the third level reflector 223 is driven to rotate by the third level rotating platform 233, and the laser beam is emitted through the third level output mirror 243. The third level light source detection module 213 performs detection. The detection order can be determined according to actual conditions and is not limited here.

[0074] An embodiment of the present invention provides a fault detection device for a laser, the laser comprising: N-level devices to be detected 100; the fault detection device comprising: a controller 1, an N-level fault detection module 2, and a power detection module 3, wherein N is a positive integer; each level of the fault detection module 2 corresponds to a level of the device to be detected 100; the N-level devices to be detected 100 and the N-level fault detection module 2 are both communicatively connected to the controller 1; each level of the fault detection module 2 comprises: a light source detection module 21, including but not limited to a temperature and humidity sensor and a power meter, for obtaining actual beam information of a laser beam passing through the device to be detected 100; the actual beam information includes but is not limited to power a N ; The reflector assembly 22 is arranged between two adjacent levels of devices to be detected 100 and is used to guide the laser beam; the rotating platform 23, the reflector assembly 22 is connected to the rotating platform 23, and the reflector assembly 22 rotates synchronously with the rotating platform 23; the output mirror assembly 24 is arranged behind the rotating platform 23 along the transmission path of the laser beam and is used to lead out the laser beam; the controller 1 includes an FPGA11, an MCU12 and a storage 13, the FPGA11 is loaded with a neural network model 111, and the neural network model 111 includes the standard beam information of the laser beam corresponding to the N-level devices to be detected 100; the MCU12 is loaded with a control system to control the rotation of the rotating platform 23; the storage 13 stores preset data; the power detection module 3 is located at the input end of the first-level device to be detected 101. The device divides the laser into N levels of devices to be detected 100 through the reflector assembly 22, and the light source detection module 21 carries the reflector assembly 22 through the rotating platform 23 to perform fault detection on each level of devices to be detected 100, avoiding the need to remove the cover for inspection and the step of disassembling the device for inspection, saving manpower, financial resources and time costs, and improving the efficiency of laser fault troubleshooting.

[0075] Figure 4 This is a flow chart of a laser fault detection method provided by an embodiment of the present invention. This embodiment is based on the self-feedback adjustment device of the laser in the above embodiment, such as Figure 4 As shown, the self-feedback control method includes:

[0076] S110 , the controller 1 controls the light source detection module 21 to detect the actual beam information of the laser beam of the device to be detected 100 in real time, including but not limited to the power.

[0077] Specifically, when detecting whether the laser is operating normally, only the last-stage light source detection module 21 is required to detect the actual beam information of the entire laser beam, such as power, pulse width, beam quality, directivity, and the like.

[0078] Exemplary, reference Figure 2 and Figure 3, the laser has four levels of devices to be detected 100. When detecting whether the laser is operating normally, the fourth-level light source detection module 214 detects the actual beam information of the laser beam passing through the four levels of devices to be detected 100, such as power, pulse width, beam quality, directivity, and so on.

[0079] S120. The controller 1 calculates the change rate of power with respect to time based on the power detected in real time, and obtains the power change rate.

[0080] Specifically, the light source detection module 21 obtains at least M power values in real time. If the current array pair is the i-th power value, then the M power values include the (i - (M - 1))-th power value to the i-th power value, where i ≥ M; and every time i changes by j times, a calculation of the power change rate is performed, 0 < j ≤ M, and i, j are integers, and the specific values of i, j, and M can be set by the user.

[0081] Exemplarily, the light source detection module 21 can obtain one power value per second. Assume: i = 220, M = 200, j = 100, that is, the current power value is set as the 220th, and 200 power values need to be obtained. Then the currently collected power values include the 221st power value to the 420th power value. And it is set that a calculation of the power change rate is performed every time the number of obtained power values changes by 100 times. Then when the number of collected power values is from the 221st power value to the 420th power value, the power change is calculated. Then when the collected power values include the 321st power value to the 520th power value, the second calculation of the power change rate is performed, and so on.

[0082] Among them, the value of j can be set according to the actual situation. When the value of j is larger, the calculation amount is smaller; when the value of j is smaller, the detection accuracy is higher.

[0083] It should be noted that in this embodiment, it is taken as an example that the light source detection module 21 obtains one power value per second, and the speed at which the light source detection module 21 obtains power values is not limited.

[0084] S130. When the power change rate is within the first change rate interval, keep the working states of the current devices unchanged.

[0085] Specifically, the working state of the laser is judged according to the power change rate, which is divided into a normal working state and an abnormal working state; among them, when the power change rate is within the first change rate interval, it is in the normal working state.

[0086] Exemplarily, the first change rate interval is (0, 0.1 W / h].

[0087] S140. When the power change rate is within the second change rate interval, generate a first fault detection result.

[0088] Specifically, the second change rate interval is greater than the first change rate interval. When the power change rate is in the second change rate interval, the laser is determined to be in an abnormal working state. At this time, the power suddenly disappears, which is determined to be a sudden disappearance. At this time, the fault detection device generates a first detection fault result, which means that the laser fails due to a power supply problem.

[0089] Exemplarily, the second change rate interval is [10 W / s, +∞).

[0090] S150 : When the power change rate is in a third change rate interval, generate a second fault detection result.

[0091] Specifically, when the power change rate is in the third change rate range, the laser is determined to be in an abnormal working state. At this time, the power slowly decreases, and it is determined to be a slow decrease. At this time, the fault detection device generates a second detection fault result, which is that the laser fails due to the environment or device aging.

[0092] Exemplarily, the third change rate interval is (0.1 W / h, 1 W / h].

[0093] S160. When the power change rate is in the fourth change rate range, the controller 1 controls the rotating platform 23 to rotate, and at the same time the light source detection module 21 obtains the actual light beam information and generates third detection information, and the controller 1 generates a third fault detection result based on the third detection information; wherein, the reflector assembly 22 rotates synchronously with the rotating platform 23.

[0094] Specifically, when the power change rate is in the fourth change rate interval, the laser is determined to be in an abnormal working state. At this time, the power drops rapidly, which is determined to be a rapid drop. At this time, it is determined that one or more levels of the device to be detected 100 in the laser are misaligned or thermally runaway. It is necessary to further determine the specific fault location. Figure 1-Figure 3 The controller 1 controls the rotating platform 23 to rotate, and at the same time the light source detection module 21 obtains actual light beam information and generates third detection information. The controller 1 generates a third fault detection result according to the third detection information.

[0095] For example, the fourth change rate interval is (1W / h, 10W / s), referring to Figure 3 , Figure 3Taking the detection of the first-level device to be detected 101 and the second-level device to be detected 102 as an example, the second-level rotating platform 232 drives the second-level reflector 222 to rotate, and reflects the laser beam passing through the first-level device to be detected 101 and the second-level device to be detected 102 out of the original optical path, and emits through the second-level output mirror 242. At this time, the second-level light source detection module 212 detects the actual light beam information at this time and generates third detection information, and compares it with the standard light beam information under this cavity shape in the neural network model 111 to determine whether the first two levels of devices to be detected 100 are faulty, and generate a third fault detection result. The third fault detection result can be that the first-level device to be detected 101 and the second-level device to be detected 102 are not faulty, or it can be that the first-level device to be detected 101 and / or the second-level device to be detected 102 are faulty.

[0096] It should be noted that, each time the rotating platform 23 is rotated one level, the actual beam information of the laser beam corresponding to the device to be detected 100 is obtained once, and the third detection information is generated once, that is, the rotating platform 23 is rotated several times, and the third fault detection results are generated several times, and all rotating platforms 23 are rotated at least once.

[0097] According to the technical solution of the embodiment of the present invention, the controller 1 controls the light source detection module 21 to detect the actual beam information of the laser beam of the device to be detected 100 in real time, including but not limited to power; the controller 1 calculates the rate of change of power with time based on the real-time detected power, and obtains the power change rate; when the power change rate is in the first change rate interval, the current working state of each device is maintained; when the power change rate is in the second change rate interval, a first fault detection result is generated; when the power change rate is in the third change rate interval, a second fault detection result is generated; when the power change rate is in the fourth change rate interval, the controller 1 controls the rotating platform 23 to rotate, and at the same time the light source detection module 21 obtains the actual beam information and generates third detection information, and the controller 1 generates a third fault detection result based on the third detection information; wherein, the reflector assembly 22 rotates synchronously with the rotating platform 23. Through the above technical solution, the power change rate is monitored to determine whether the laser has a fault, and the power change rate is divided into intervals, the working state of the laser is further refined, and the cause of the laser failure is determined, which helps users to discover the laser failure in time and quickly locate the cause of the failure. If the internal device of the laser, that is, the device to be detected 100, fails, the cooperation of the rotating platform 23 and the reflector assembly 22 can achieve the effect of quickly locating the faulty device for the N-level device to be detected 100 of the laser.

[0098] Optionally, when the power change rate is within a second change rate interval, generating a first fault detection result includes:

[0099] When the power change rate is in the second change rate interval, the controller 1 obtains first detection information from the power detection module 3, and inputs the first detection information into the neural network model 111 to generate a first fault detection result.

[0100] The first detection information includes voltage and current.

[0101] Specifically, when the power change rate is in the second change rate range, the power supply detection module 3 detects the actual voltage and current of the power supply, and inputs them into the neural network model 111, and compares them with the standard power supply voltage and current values. The numerical difference or deviation percentage can be calculated and compared with the first preset value to determine whether the power supply has failed.

[0102] Exemplarily, the first preset value is 1, and the numerical difference between the actual power supply voltage and the standard voltage is calculated, and the numerical difference between the actual power supply current and the standard current is calculated. If any of the numerical differences is greater than or equal to 1, it is determined that the power supply has failed, and a first fault detection report is generated as follows: the power supply voltage and / or current has failed; if both numerical differences are less than 1, a first fault detection report is generated as follows: the power supply voltage and current have not failed.

[0103] Optionally, when the power change rate is within a third change rate interval, generating a second fault detection result includes:

[0104] When the power change rate is in the third change rate interval, the controller 1 obtains second detection information from the light source detection module 21 and inputs the second detection information into the neural network model 111 to generate a second fault detection result.

[0105] The second detection information includes ambient temperature and humidity.

[0106] Specifically, when the power change rate is in the third change rate range, the light source detection module 21 detects the ambient temperature and humidity, and inputs them into the neural network model 111, and compares them with the standard ambient temperature and humidity values. The numerical difference or deviation percentage can be calculated and compared with the second preset value to determine whether the environment has changed significantly.

[0107] Exemplarily, the second preset value is 5%, and the deviation percentage between the actual ambient temperature and the standard temperature is calculated, and the deviation percentage between the actual ambient humidity and the standard humidity is calculated. If the deviation percentage of any of the values ​​is greater than or equal to 5%, it is determined that the environment has changed, and a second fault detection report is generated as follows: the ambient temperature and / or humidity has changed; if the difference between the two values ​​is less than 5%, a second fault detection report is generated as the ambient temperature and humidity have not changed.

[0108] Figure 5This is a flow chart of another laser fault detection method provided by an embodiment of the present invention. The technical solution of this embodiment is further optimized based on the above optional technical solutions. Figure 5 As shown, in the above step S140, when the power change rate is in the second change rate interval, after generating the first fault detection result, the following steps are further included:

[0109] The first fault detection result is divided into two situations: fault exists and no fault exists. When the first fault detection result is no fault,

[0110] The controller 1 controls the rotating platform 23 to rotate, and the light source detection module 21 obtains actual light beam information and generates third detection information. The controller 1 generates a third fault detection result according to the third detection information. The reflector assembly 22 rotates synchronously with the rotating platform 23 .

[0111] After generating the second fault detection result in the above step S150 when the power change rate is in the third change rate interval, the method further includes:

[0112] The second fault detection result is divided into two situations: fault exists and no fault exists. When the second fault detection result is no fault,

[0113] The controller 1 controls the rotating platform 23 to rotate, and the light source detection module 21 obtains actual light beam information and generates third detection information. The controller 1 generates a third fault detection result according to the third detection information. The reflector assembly 22 rotates synchronously with the rotating platform 23 .

[0114] For details not yet provided in this embodiment, please refer to the previous embodiment.

[0115] refer to Figure 1-Figure 5 , the fault detection method includes the following specific steps:

[0116] S210 , the controller 1 controls the light source detection module 21 to detect the actual beam information of the laser beam of the device to be detected 100 in real time, including but not limited to the power.

[0117] S220. The controller 1 calculates the rate of change of the power over time based on the real-time detected power to obtain the power change rate.

[0118] S230: When the power change rate is in the first change rate range, maintain the current working state of each device.

[0119] S240 : When the power change rate is in a second change rate interval, generate a first fault detection result.

[0120] S241, the first fault detection result is divided into two situations: there is a fault and there is no fault. When the first fault detection result is no fault,

[0121] The controller 1 controls the rotating platform 23 to rotate, and the light source detection module 21 obtains actual light beam information and generates third detection information. The controller 1 generates a third fault detection result according to the third detection information. The reflector assembly 22 rotates synchronously with the rotating platform 23 .

[0122] Specifically, when the power change rate is in the second change rate interval, the laser is determined to be in an abnormal working state. At this time, the power suddenly disappears, which is determined to be a sudden disappearance. At this time, the possible problem is that there is a problem with the power supply or optical damage to the device to be detected 100 in the laser. The light source detection module 21 detects the power supply voltage and current, and compares them with the standard power supply voltage and current to determine whether the power supply is faulty, and then generates a first fault detection result. If the power supply fails, the first fault result is that there is a fault, prompting the user to check the power supply condition; if the power supply does not fail, the first fault result is that there is no fault, and the controller 1 controls the rotating platform 23 to rotate. At the same time, the light source detection module 21 obtains the actual light beam information and generates third detection information. The controller 1 generates a third fault detection result based on the third detection information.

[0123] It should be noted that each time the rotating platform 23 is rotated one level, the actual beam information of the laser beam corresponding to the module to be detected is obtained once, and the third detection information is generated once, that is, the rotating platform 23 is rotated several times, and the third fault detection results are generated several times, and all rotating platforms 23 are rotated at least once.

[0124] The embodiment of the present invention improves the laser failure situation when the power change rate is in the second change rate range. After checking the power supply problem, considering that the device to be detected 100 may be faulty, it is determined that the power supply is not faulty and continues to check whether the device to be detected 100 is faulty.

[0125] S250 : When the power change rate is in a third change rate interval, generate a second fault detection result.

[0126] S251, the second fault detection result is divided into two situations: fault exists and no fault exists. When the second fault detection result is no fault exists,

[0127] The controller 1 controls the rotating platform 23 to rotate, and the light source detection module 21 obtains actual light beam information and generates third detection information. The controller 1 generates a third fault detection result according to the third detection information. The reflector assembly 22 rotates synchronously with the rotating platform 23 .

[0128] Specifically, when the power change rate is in the third change rate interval, the laser is determined to be in an abnormal working state. At this time, the power slowly decreases and is determined to be in a slow decline. At this time, it may be due to a fault in the environment or device aging. The light source detection module 21 detects the ambient temperature and humidity, and inputs them into the neural network model 111, and compares them with the standard ambient temperature and humidity values ​​to determine whether the environment has changed significantly, and then generates a second fault detection result. If the ambient temperature and humidity change significantly, the third fault detection result is that there is a fault; if the ambient temperature and humidity do not change significantly, the third fault detection result is that there is no fault. Further check the aging problem of the device to be detected 100, the controller 1 controls the rotation of the rotating platform 23, and at the same time the light source detection module 21 obtains the actual light beam information and generates the third detection information. The controller 1 generates the third fault detection result based on the third detection information.

[0129] It should be noted that each time the rotating platform 23 rotates one level, the actual beam information of the laser beam corresponding to the module to be detected is obtained once, and the third detection information is generated once. That is, the third fault detection results are generated several times when the rotating platform 23 is rotated several times. All rotating platforms 23 rotate at least once.

[0130] The embodiment of the present invention improves the laser failure situation when the power change rate is in the third change rate range. After checking the temperature and humidity problems of the environment, considering that it may be due to the aging problem of the device, after confirming that the ambient temperature and humidity have no obvious changes, the aging problem of the device to be tested 100 is checked.

[0131] S260. When the power change rate is in the fourth change rate range, the controller 1 controls the rotating platform 23 to rotate, and at the same time the light source detection module 21 obtains the actual light beam information and generates third detection information, and the controller 1 generates a third fault detection result based on the third detection information; wherein, the reflector assembly 22 rotates synchronously with the rotating platform 23.

[0132] According to the technical solution of the embodiment of the present invention, the controller 1 controls the light source detection module 21 to detect the actual beam information of the laser beam of the device to be detected 100 in real time, including but not limited to power; the controller 1 calculates the rate of change of power over time based on the real-time detected power, and obtains the power change rate; when the power change rate is in the first change rate interval, the current working state of each device is maintained; when the power change rate is in the second change rate interval, a first fault detection result is generated; the first fault detection result is divided into two situations: there is a fault and there is no fault. When the first fault detection result is no fault, the controller 1 controls the rotating platform 23 to rotate, and at the same time the light source detection module 21 obtains the actual beam information and generates a third detection information, and the controller 1 generates a third fault detection result based on the third detection information; wherein, the reflector assembly 22 rotates with The platform 23 rotates synchronously; when the power change rate is in the third change rate interval, a second fault detection result is generated; the second fault detection result is divided into two situations: there is a fault and there is no fault. When the second fault detection result is no fault, the controller 1 controls the rotating platform 23 to rotate, and at the same time, the light source detection module 21 obtains the actual light beam information and generates the third detection information, and the controller 1 generates the third fault detection result according to the third detection information; wherein, the reflector assembly 22 rotates synchronously with the rotating platform 23; when the power change rate is in the fourth change rate interval, the controller 1 controls the rotating platform 23 to rotate, and at the same time, the light source detection module 21 obtains the actual light beam information and generates the third detection information, and the controller 1 generates the third fault detection result according to the third detection information; wherein, the reflector assembly 22 rotates synchronously with the rotating platform 23. Through the above technical solution, when the power change rate is in the second change rate interval and the third change rate interval, the laser fault situation is further checked after checking the power supply and environment problems, so that the process is more perfect and the fault problem and location of the laser can be accurately determined.

[0133] Furthermore, in the above steps S241, S251, and S260, the controller 1 controls the rotating platform 23 to rotate, and at the same time, the light source detection module 21 obtains actual light beam information and generates third detection information. The controller 1 generates a third fault detection result based on the third detection information. The process includes:

[0134] S261 , the controller 1 controls the i-th stage rotating platform 23 to rotate, and the i-th stage reflecting mirror assembly 22 rotates synchronously with the i-th stage rotating platform 23 , 1≤i≤N.

[0135] S262 , the controller 1 controls the i-th stage light source detection module 21 to detect actual light beam information passing through the i-th stage device to be detected 100 , including but not limited to power.

[0136] S263. The controller 1 calculates the deviation percentage between the i-th level actual beam information and the i-th level standard beam information in the neural network model 111 to generate third detection information.

[0137] S264. The controller 1 generates a third fault detection result according to the third detection information.

[0138] Specifically, refer to Figure 1-Figure 3 The laser has a total of N levels of devices to be detected 100. The controller 1 controls the rotating platform 23 to rotate step by step, such as rotating from the first-level rotating platform 231 to the N-level rotating platform 23, or rotating from the N-level rotating platform 23 to the first-level rotating platform 231 step by step. Every time the rotating platform 23 rotates one level, the corresponding light source detection module 21 detects the actual beam information of the current device to be detected 100, which may include power, pulse width, beam quality and directivity, etc., and inputs it into the neural network model 111. The deviation percentage is calculated with the standard beam information of the corresponding cavity type to generate the third detection information, and the deviation percentage is compared with the preset value. If the deviation percentage of any one parameter among power, pulse width, beam quality and directivity is greater than or equal to the preset value, it is determined that a fault occurs. If they are all less than the preset value, it is determined that there is no fault and the third detection fault result is generated.

[0139] Exemplary, reference Figure 1 and Figure 3, the laser has four levels of devices to be detected 100. Taking the inspection sequence from the first-level device to be detected 101 to the fourth-level device to be detected 104 as an example, the first-level rotating platform 231 drives the first-level reflector 221 to rotate, and reflects the laser beam passing through the first-level device to be detected 101 out of the original optical path, and emits through the first-level output mirror 241. At this time, the first-level light source detection module 211 detects the actual beam information, and calculates the deviation percentage with the standard beam information under this cavity shape in the neural network model 111 to generate the third detection information. The deviation percentage is compared with the preset value to determine whether the first-level device to be detected 101 is faulty, and then generate the third fault detection result, that is, the first-level device to be detected 101 is faulty, or the first-level device to be detected 101 is not faulty; if the third fault detection result is the first There is a fault in the first-level device to be detected 101. At this time, the engineer repairs the first-level device to be detected 101. After the repair is completed, the second-level rotating platform 232 is controlled to drive the second-level reflector 222 to rotate, and the laser beam is emitted through the second-level output mirror 242. At this time, the second-level light source detection module 212 detects the actual beam information, and calculates the deviation percentage with the standard beam information under this cavity shape in the neural network model 111 to generate third detection information. The deviation percentage is compared with the preset value to determine whether the first-level device to be detected 101 and the second-level device to be detected 102 are faulty, and then generate a third fault detection result, that is, the first-level device to be detected 101 and / or the second-level device to be detected 102 are faulty, or the first-level device to be detected 101 and the second-level device to be detected 102 are both faulty. If the third fault detection result indicates that the first-stage DUT 101 and / or the second-stage DUT 102 are faulty, and since the first-stage DUT 101 has been repaired, it is assumed that the second-stage DUT 102 is faulty, and the engineer repairs the second-stage DUT 102. Similarly, the third-stage rotating platform 233 rotates the third-stage reflector 223 to detect whether the third-stage DUT 103 is faulty, and the fourth-stage rotating platform 234 rotates the fourth-stage reflector 224 to detect whether the fourth-stage DUT 104 is faulty.

[0140] It should be noted that if the third fault detection result is a fault, the engineer can perform another test after repairing the corresponding device to ensure that the device to be detected 100 is working normally. If the second-level device to be detected 102 is found to be faulty after detection, after repairing the second-level device to be detected 102, the second-level light source detection module 212 once again detects the actual beam information of the laser beam output by the first-level device to be detected 101 and the second-level device to be detected 102 to determine whether the second-level device to be detected 102 is working normally.

[0141] The embodiment of the present invention improves the fault troubleshooting process of the device to be detected 100, quickly locates the faulty device, and improves the efficiency and accuracy of fault detection. Moreover, the method is simple and easy to operate.

[0142] Note that the above are only preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will appreciate that the present invention is not limited to the specific embodiments herein, and that various obvious changes, readjustments, combinations, and substitutions are possible for those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments and may include many other equivalent embodiments without departing from the scope of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. A laser fault detection device, characterized in that: The laser comprises: N levels of devices to be detected (100); The fault detection device comprises: a controller (1), N-level fault detection modules (2) and a power detection module (3), wherein N is a positive integer; each level of the fault detection module (2) corresponds to one level of the device to be detected (100); the N-level devices to be detected (100), the N-level fault detection modules (2) and the power detection modules (3) are all communicatively connected to the controller (1); Each level of the fault detection module (2) includes: The light source detection module (21), including but not limited to a temperature and humidity sensor and a power meter, is used to obtain actual beam information of the laser beam passing through the device to be detected (100); the actual beam information includes but is not limited to power a N ; A reflector assembly (22) is provided between two adjacent stages of the devices to be detected (100) and is used to guide the laser beam; A rotating platform (23), the reflector assembly (22) is connected to the rotating platform (23), and the reflector assembly (22) rotates synchronously with the rotating platform (23); an output mirror assembly (24), arranged behind the rotating platform (23) along the transmission path of the laser beam, and used for leading out the laser beam a; The controller (1) includes an FPGA (11), an MCU (12), and a memory (13); the FPGA (11) carries a neural network model (111), and the neural network model (111) includes standard beam information of the laser beam corresponding to N levels of the device to be detected (100); the MCU (12) carries a control system for controlling the rotation of the rotating platform (23); and the memory (13) stores preset data; The power detection module (3) is located at the input end of the first-stage device to be detected (101) and is used to detect the voltage and current of the laser; The controller (1) is used to calculate the power a N The rate of change over time, monitoring the power change rate to determine whether the laser has failed, and dividing the power change rate into intervals to further refine the working state of the laser and determine the cause of the laser failure; If the device to be detected (100) fails, the cooperation between the rotating platform (23) and the reflector assembly (22) achieves the effect of quickly locating the faulty device for the N-level devices to be detected (100).

2. The fault detection device according to claim 1, characterized in that: The light source detection module (21) also includes a frequency meter and a beam quality tester, and the actual beam information also includes a pulse width m N , beam quality p N .

3. A laser fault detection method, based on the laser fault detection device according to claim 1, characterized in that: The fault detection method comprises: The controller (1) controls the light source detection module (21) to detect in real time actual beam information of the laser beam of the device to be detected (100), including but not limited to power; The controller (1) calculates the rate of change of the power over time based on the power detected in real time, and obtains the power change rate; When the power change rate is in the first change rate interval (0, 0.1 W / h], it is a normal working state and the working state is maintained; When the power change rate is in the second change rate interval [10 W / s, +∞), a first fault detection result is generated, indicating that the laser fails due to a power supply problem; When the power change rate is in the third change rate interval (0.1 W / h, 1 W / h], a second fault detection result is generated, indicating that the laser fails due to the environment or device aging; When the power change rate is in a fourth change rate interval (1W / h, 10W / s), the laser is determined to be in an abnormal working state, and one or more of the devices to be detected (100) in the laser are misaligned or thermally runaway; wherein the controller (1) controls the rotation of the rotating platform (23), and simultaneously the light source detection module (21) obtains actual light beam information and generates third detection information, and the controller (1) generates a third fault detection result according to the third detection information; wherein the reflector assembly (22) rotates synchronously with the rotating platform (23).

4. The fault detection method according to claim 3, characterized in that: The first fault detection result is divided into two situations: a fault exists and no fault exists. When the first fault detection result is no fault exists, The controller (1) controls the rotation of the rotating platform (23), while the light source detection module (21) obtains actual light beam information and generates the third detection information, and the controller (1) generates the third fault detection result according to the third detection information; wherein the reflector assembly (22) rotates synchronously with the rotating platform (23).

5. The fault detection method according to claim 3, characterized in that: The second fault detection result is divided into two situations: there is a fault and there is no fault. When the second fault detection result is no fault, The controller (1) controls the rotation of the rotating platform (23), while the light source detection module (21) obtains actual light beam information and generates the third detection information, and the controller (1) generates the third fault detection result according to the third detection information; wherein the reflector assembly (22) rotates synchronously with the rotating platform (23).

6. The fault detection method according to claim 3, characterized in that: The controller (1) controls the rotating platform (23) to rotate, while the light source detection module (21) obtains actual light beam information and generates third detection information. The controller (1) generates a third fault detection result based on the third detection information. The process includes: The controller (1) controls the rotation of the i-th level rotating platform (23), and the i-th level reflecting mirror assembly (22) rotates synchronously with the i-th level rotating platform (23), 1≤i≤N; The controller (1) controls the light source detection module (21) of the i-th level to detect actual light beam information passing through the device to be detected (100) of the i-th level, including but not limited to power; The controller (1) calculates the deviation percentage between the actual beam information of the i-th level and the standard beam information of the i-th level in the neural network model (111), and generates the third detection information; The controller (1) generates the third fault detection result according to the third detection information.

7. The fault detection method according to claim 3, characterized in that: When the power change rate is in a second change rate interval, generating a first fault detection result, the process includes: When the power change rate is in a second change rate interval, the controller (1) obtains first detection information from the power detection module (3), and inputs the first detection information into the neural network model (111) to generate a first fault detection result.

8. The fault detection method according to claim 7, characterized in that: The first detection information includes voltage and current.

9. The fault detection method according to claim 3, characterized in that: When the power change rate is in a third change rate interval, generating a second fault detection result, the process includes: When the power change rate is in a third change rate interval, the controller (1) obtains second detection information from the light source detection module (21), and inputs the second detection information into the neural network model (111) to generate the second fault detection result.

10. The fault detection method according to claim 9, characterized in that: The second detection information includes ambient temperature and humidity.

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