A detection method for arc sensor module

Abstract

The present invention relates to the field of arc sensor detection technology, and specifically to a detection method for an arc sensor module. The method comprises: obtaining the output signal of the arc sensor; periodically starting and stopping the light source at the same light source intensity, and determining the response sensitivity according to the number of changes in the output signal and the periodic start and stop time; adjusting the light source to a random intensity and randomly starting and stopping, and determining the recognition difficulty according to the duration and the light source intensity; determining the response effect index according to the recognition difficulty and the difference between the response time and the random start and stop time; combining the response sensitivity and the response effect index, determining the response preferred index of the arc sensor under the corresponding light intensity trigger threshold; and then screening to obtain the optimal working threshold. The present invention can adaptively select the optimal light intensity trigger threshold, thereby avoiding detection errors caused by arc light instability, improving the overall detection effect, and enhancing the stability and reliability of arc sensor detection.

Description

Technical Field

[0001] The present invention relates to the technical field of arc sensor detection, and in particular to a detection method for an arc sensor module. Background Art

[0002] Arc sensor is a device used to detect and monitor arc light. It plays an important role in the fields of industry, electricity, etc. It can detect the existence of arc light in time and send out response signals to protect the safety of equipment and personnel. There is a common fault phenomenon in electrical equipment, namely arc fault. Arc fault is a high-energy, fast-release electrical fault phenomenon, usually accompanied by high temperature, high pressure and strong light. Therefore, installing arc sensor modules in electrical equipment can greatly ensure the normal operation of electrical equipment.

[0003] When traditional arc sensors monitor the arc in the system, most arc sensors rely on the visible and near-infrared components of the arc for monitoring, because the arc phenomenon is accompanied by high temperature, high pressure and strong light, and the temperature of the power equipment itself rises when it is in operation. However, since the duration and intensity of the arc are not stable, the sensor may not be able to detect the arc when it is of lower intensity or shorter duration, resulting in detection errors, affecting the overall detection effect, and the stability and reliability of arc sensor detection are insufficient. Summary of the invention

[0004] In order to solve the technical problems in the related art that the duration and intensity of the arc light are not stable, when facing arc light of lower intensity or shorter duration, the sensor may not be able to detect the occurrence of the arc light, resulting in detection errors, affecting the overall detection effect, and the arc sensor detection stability and reliability are insufficient, the present invention provides a detection method for an arc sensor module, and the technical solution adopted is as follows:

[0005] The present invention proposes a detection method for an arc sensor module, the method comprising:

[0006] Obtaining the output signal of the arc sensor when it is irradiated by light sources of different intensities at any light intensity trigger threshold;

[0007] Under the same light source intensity, periodically start and stop the light source, and determine the response sensitivity under the corresponding light intensity trigger threshold according to the number of changes of the output signal following the light source periodic start and stop adjustment and the periodic start and stop time;

[0008] The light source is adjusted to a random intensity and randomly started and stopped, and the recognition difficulty of each random start and stop is determined according to the duration and light source intensity of each random start and stop; the response effect index of all random starts and stops is determined according to the recognition difficulty of each random start and stop and the difference between the response duration of the output signal at each random start and stop and the random start and stop duration;

[0009] In combination with the response sensitivity and the response effect index, the preferred response index of the arc sensor under the corresponding light intensity trigger threshold is determined; the light intensity trigger threshold is adjusted, and the optimal working threshold is screened according to the preferred response index corresponding to all light intensity trigger thresholds.

[0010] Furthermore, the method for acquiring the output signal of the light source includes:

[0011] The TTL pin of the arc sensor is connected to an oscilloscope, and the output signal of the TTL pin is collected via the oscilloscope.

[0012] Furthermore, the adjustment cycle of the light source periodic start and stop adjustment is: after starting for 10 seconds, stop for 1 second.

[0013] Further, according to the number of changes of the output signal following the periodic start and stop regulation of the light source and the periodic start and stop time, the response sensitivity under the corresponding light intensity trigger threshold is determined, including:

[0014] Calculate the ratio of the number of changes to the number of actual light source cycle starts as the cycle start recognition ratio;

[0015] Calculate the average of the time intervals between each start and stop and the actual start and stop of the light source, perform negative correlation mapping on the average, and obtain the delayed response coefficient;

[0016] The product of the periodic start recognition ratio and the delayed response coefficient is normalized to the maximum and minimum values ​​as the response sensitivity.

[0017] Furthermore, according to the duration and light source intensity of each random start and stop, the recognition difficulty of the random start and stop is determined, including:

[0018] Determine the sum of the start duration and the stop duration in a random start and stop as the random start and stop time;

[0019] The product value of the light source intensity and the random start and stop time is calculated, negative correlation mapping is performed, and maximum and minimum value normalization processing is performed to obtain the recognition difficulty under the random start and stop.

[0020] Furthermore, according to the recognition difficulty of each random start and stop, and the difference between the response time of the output signal in each random start and stop and the random start and stop time, the response effect index of all random starts and stops is determined, including:

[0021] Calculate the absolute value of the difference between the response time of the output signal under each random start and stop and the random start and stop time, and normalize the maximum and minimum values ​​as the start time difference;

[0022] Calculate the difference between the recognition difficulty and the start-up time difference, and normalize the maximum and minimum values ​​as the start-stop effect coefficient of each random start-stop, wherein the start-stop effect coefficient of the random start-stop that is not recognized is 0;

[0023] The response effect index is determined by combining the start-stop effect coefficients of all random starts and stops.

[0024] Furthermore, the response effect index is determined by combining the start-stop effect coefficients of all random starts and stops, including:

[0025] Calculate the mean of the start-stop effect coefficients of all random starts and stops as the first response indicator;

[0026] The standard deviation of the start-stop effect coefficient of all random starts and stops is negatively correlated and mapped as the second response indicator;

[0027] The product of the first response index and the second response index is calculated, and the maximum and minimum values ​​are normalized to be the response effect index.

[0028] Furthermore, in combination with the response sensitivity and the response effect index, the preferred response index of the arc sensor under the corresponding light intensity trigger threshold is determined, including:

[0029] The product of the response sensitivity and the response effect index is used as the response optimization index.

[0030] Furthermore, according to the response optimization indexes corresponding to all light intensity trigger thresholds, the best working thresholds are screened and obtained, including:

[0031] The light intensity trigger threshold corresponding to the maximum value of the response optimization index is used as the optimal working threshold.

[0032] Furthermore, the light intensity trigger threshold is adjusted by an adjustable resistor.

[0033] The present invention has the following beneficial effects:

[0034] The present invention obtains the output signal irradiated by light sources of different intensities under different light intensity trigger thresholds, and conducts specific analysis from two dimensions: constant light intensity, random start and stop, and random light intensity and start and stop; wherein, under constant light intensity, periodic start and stop can analyze the response sensitivity of the arc sensor under the corresponding light intensity trigger threshold; and under the conditions of random light intensity and random start and stop, it can simulate the real operation scene, obtain the response ability of the arc sensor to the arc light, that is, obtain the response effect index; and then combine the two analysis dimensions of response sensitivity and response effect index to realize the optimal analysis of the light intensity trigger threshold, determine the response preferred index of the light intensity trigger threshold, and screen and obtain the optimal working threshold according to the response preferred index corresponding to all light intensity trigger thresholds. In summary, the present invention can adaptively select the optimal light intensity trigger threshold, thereby avoiding detection errors caused by unstable arc light, improving the overall detection effect, and enhancing the stability and reliability of arc sensor detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions and advantages in the embodiments of the present invention or the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0036] Figure 1 A flow chart of a detection method of an arc sensor module provided by an embodiment of the present invention;

[0037] Figure 2 A schematic diagram of an arc sensor provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0038] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the following is a detailed description of the detection method of an arc sensor module proposed by the present invention, its specific implementation method, structure, characteristics and effects, in combination with the accompanying drawings and preferred embodiments. In the following description, different "one embodiment" or "another embodiment" does not necessarily refer to the same embodiment. In addition, specific features, structures or characteristics in one or more embodiments may be combined in any suitable form.

[0039] Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

[0040] The specific scheme of the detection method of the arc sensor module provided by the present invention is described in detail below with reference to the accompanying drawings.

[0041] See also Figure 1 , which shows a flow chart of a detection method of an arc sensor module provided by an embodiment of the present invention, the method comprising:

[0042] S101: Obtaining an output signal of an arc sensor when it is illuminated by light sources of different intensities at any light intensity trigger threshold.

[0043] Arc sensor is a device used to detect and monitor arc light. It plays an important role in the fields of industry, electricity, etc. It can detect the existence of arc light in time and send out response signals to protect the safety of equipment and personnel. Figure 2 , Figure 2 Schematic diagram of an arc sensor provided by an embodiment of the present invention. There is a common fault phenomenon in electrical equipment, namely arc fault, which is a high-energy, fast-release electrical fault phenomenon, usually accompanied by high temperature, high pressure and strong light, which will pose a serious threat to equipment and personal safety. Therefore, installing arc protection devices in electrical equipment can greatly ensure the normal operation of electrical equipment, thereby reducing the disastrous consequences that may be caused by arc faults and improving the safety and reliability of electrical systems.

[0044] When traditional arc sensors monitor the system for arc, most arc sensors rely on the visible and near-infrared components of the arc for monitoring, because the arc phenomenon is accompanied by high temperature, high pressure and strong light, and the temperature of the power equipment itself rises when it is in operation. Since the duration and intensity of the arc are not stable, the sensor may not be able to detect the arc when it is of lower intensity or shorter duration, resulting in unexpected situations. By adjusting the light intensity trigger threshold, the regulation effect can be achieved.

[0045] Before use, the arc light sensor needs to adjust its light intensity trigger threshold according to the use environment. An adjustable resistor is connected to the back of the sensor. The gain is changed by adjusting the resistor, thereby changing the light intensity trigger threshold of the sensor module. Due to the influence of factors such as temperature and humidity, voltage, and arc discharge point distance in the use environment, arc photosensitivity may appear low intensity and short duration. At this time, when the light intensity trigger threshold of the sensor module is high, that is, when the sensitivity is low, for arc light with low intensity, it may be difficult for the sensor to accurately detect the arc light, and for arc light with short duration, the sensor may not be able to respond in time, ultimately resulting in poor stability of the sensor module. In summary, the arc light sensor module needs to be tested before use to ensure that it is sufficiently stable during long-term operation.

[0046] Before testing, you need to do some preliminary preparations to test the test equipment to be used, including arc sensor module, fiber jumper, power supply, oscilloscope, and light source with adjustable light intensity, to ensure that the equipment can work normally. Then, according to the pin function of the arc sensor module, make corresponding connections to the equipment; that is, connect the positive and negative poles of the corresponding power supply and the oscilloscope to the arc sensor, and connect the pin responsible for TTL signal output to the signal receiving end of the oscilloscope to obtain the output signal of the sensor.

[0047] It should be noted that during the connection process, it is necessary to ensure that the optical fiber is not excessively bent, and the bending radius of the optical fiber must not be less than 30mm to prevent damage to the optical fiber and affect signal transmission. After completing the connection, fix the arc sensor probe on the test bench to ensure that it can receive light from the artificial light source.

[0048] Furthermore, the light intensity trigger threshold of the arc sensor module is initially calibrated. The specific operations are as follows:

[0049] 1) Set the light intensity. Here, the light intensity of the adjustable light source is set to 1000 lux.

[0050] 2) Control the light source to illuminate the probe of the arc sensor module;

[0051] 3) Adjust the resistor until the signal on the oscilloscope is just 5V. At this time, the light intensity trigger threshold of the sensor It is 1000lux.

[0052] Finally, the data samples collected by the arc sensor module are read and stored through the oscilloscope. At this point, the preliminary preparations for testing the arc sensor module are completed.

[0053] In the embodiment of the present invention, different light intensity trigger thresholds and different light source intensities are adjusted to achieve the acquisition of the output signal on the oscilloscope. For the arc sensor, when the light intensity is higher than its light intensity trigger threshold, the TTL pin will transmit a 5V output signal to the oscilloscope, indicating the presence of arc light, and when the light intensity is lower than the threshold, no signal will be transmitted. Based on the characteristics of the output signal, the subsequent detection process can be realized, and see the subsequent embodiments for details.

[0054] S102: Under the same light source intensity, periodically start and stop the light source, and determine the response sensitivity under the corresponding light intensity trigger threshold according to the number of changes of the output signal following the light source cycle start and stop adjustment and the cycle start and stop time.

[0055] In an embodiment of the present invention, after completing the calibration of the arc sensor module, it is necessary to test the sensitivity of the arc sensor module at the light intensity trigger threshold to ensure that the arc sensor module can be correctly triggered. During the specific test process, it is necessary to determine the response sensitivity under the corresponding light intensity trigger threshold based on the number of changes in the output signal following the cycle start and stop adjustment of the light source and the cycle start and stop time.

[0056] Further, in some embodiments of the present invention, the adjustment cycle of the light source cycle start-stop regulation is: after every 10 seconds of start-up, stop for 1 second. Therefore, according to the number of changes of the output signal following the light source cycle start-stop regulation and the cycle start-stop time, the response sensitivity under the corresponding light intensity trigger threshold is determined, including: calculating the ratio of the number of changes to the actual number of light source cycle starts as the cycle start recognition ratio; calculating the mean of the time interval between each start-stop and the actual light source start-stop, and performing negative correlation mapping on the mean to obtain the delayed response coefficient; the product of the cycle start recognition ratio and the delayed response coefficient is normalized to the maximum and minimum values ​​as the response sensitivity.

[0057] Among them, the cycle start recognition ratio represents the ratio of recognition ability, that is, the number of times the TTL pin transmits a 5V output signal to the oscilloscope. The more times, the stronger the recognition ability. The shorter the time interval between each start and stop and the actual light source start and stop, the more sensitive the start and stop. That is, when the actual light source is started, the arc sensor module can quickly detect the actual light source start in a very short time and generate the corresponding output signal. The higher its sensitivity, the higher the value of the delay response coefficient. Therefore, the mean of the time interval between each start and stop and the actual light source start and stop is negatively correlated to obtain the delay response coefficient.

[0058] It should be noted that a positive correlation indicates that there is a same-direction change relationship between the independent variable and the dependent variable, that is, the larger the independent variable is, the larger the dependent variable is; a negative correlation indicates that there is an opposite-direction change relationship between the independent variable and the dependent variable, that is, the smaller the independent variable is, the larger the dependent variable is; the specific manifestations of the positive correlation and the negative correlation are determined by actual applications and are not particularly limited in this application.

[0059] That is to say, the negative correlation mapping in the embodiment of the present invention means that the larger the value of the mean time interval between each start and stop and the actual start and stop of the light source is, the smaller the value of the delay response coefficient obtained after mapping is. The embodiment of the present invention can directly calculate the inverse of the mean time interval between each start and stop and the actual start and stop of the light source as the delay response coefficient, or other negative correlation mapping methods such as opposite numbers can be used, without limitation.

[0060] First, keep the light intensity of the adjustable light source (1000 lux) unchanged, change the trigger frequency of the light source to make it trigger periodically, that is, set the light source to be turned off once every 10 seconds, and each shutdown time is 1 second; then, re-control the light source to illuminate the probe of the arc sensor module, and read the data of the oscilloscope; according to the display on the oscilloscope, obtain the time interval between 0V and 5V when the light source is extinguished and lit for the i-th time, that is, the time interval between each start and stop and the actual start and stop of the light source, calculate its mean, and negatively correlate and map it to obtain the delayed response coefficient. Finally, combined with the delayed response coefficient of the arc sensor module and the proportion of periodic start recognition, calculate the sensitivity of the arc sensor module, that is, the degree of response sensitivity.

[0061] By keeping the light source intensity constant, the sensitivity test can be performed at a fixed light source intensity, which is convenient for subsequent start-stop analysis based on sensitivity. It is understandable that since repeated sensitivity tests at different light source intensities are too inefficient, this solution can select a preset standard light source intensity (1000 lux) to achieve response sensitivity analysis.

[0062] S103: Adjust the light source to a random intensity and start and stop randomly, and determine the recognition difficulty of each random start and stop according to the duration and light source intensity of each random start and stop; determine the response effect index of all random starts and stops according to the recognition difficulty of each random start and stop, and the difference between the response time of the output signal at each random start and stop and the random start and stop time.

[0063] The continuous irradiation light is intermittently adjusted, that is, the continuous arc light is randomly triggered, and the light intensity of the light source is randomly simulated, so as to simulate the real scene, obtain the response ability of the sensor to the arc light, and use it as the response effect indicator.

[0064] Furthermore, in some embodiments of the present invention, the recognition difficulty of each random start and stop is determined based on the duration and light source intensity of each random start and stop, including: determining the sum of the start duration and the stop duration of a random start and stop as the random start and stop time; calculating the product of the light source intensity and the random start and stop time, performing negative correlation mapping and maximum and minimum value normalization processing, and obtaining the recognition difficulty of the random start and stop.

[0065] In the embodiment of the present invention, the duration is randomly generated in the range of , in milliseconds; the random generation range of arc light intensity , the unit is Lux; it should be noted that arc light is divided into weak arc according to its intensity , Medium Arc , strong arc , one of them can be randomly produced during the test. Then, the light source is re-controlled to illuminate the probe of the arc sensor module, the simulation is performed for a sufficient time and the output signal of the oscilloscope is read.

[0066] Among them, since the start and stop time are random, the sum of the start duration and the stop duration in a random start and stop is the random start and stop time, that is, it starts from the moment when the display on the oscilloscope becomes 5v and ends when it becomes 5v next time, including a period of time when starting and a period of time when stopping, and the entire duration range is taken as the random start and stop time.

[0067] It is understandable that the longer the random start and stop time is, the lower the recognition difficulty is, while faster and more sensitive start and stop require more sensitive recognition, which means that the recognition difficulty is higher. Therefore, the recognition difficulty can be determined based on the random start and stop time.

[0068] The weaker the light intensity, the more the arc sensor cannot effectively sense the light intensity, and the higher the recognition difficulty. Combined with the analysis, it is found that the light intensity and the random start and stop time are both negatively correlated with the recognition difficulty. In the embodiment of the present invention, the product value of the light intensity and the random start and stop time is calculated, and negative correlation mapping is performed and the maximum and minimum values ​​are normalized to obtain the recognition difficulty under the random start and stop.

[0069] Furthermore, in some embodiments of the present invention, according to the recognition difficulty under each random start and stop, and the difference between the response time of the output signal under each random start and stop and the random start and stop time, the response effect index of all random starts and stops is determined, including: calculating the absolute value of the difference between the response time of the output signal under each random start and stop and the random start and stop time, and normalizing the maximum and minimum values ​​as the start-up time difference; calculating the difference between the recognition difficulty and the start-up time difference, and normalizing the maximum and minimum values ​​as the start-stop effect coefficient of each random start and stop, wherein the start-stop effect coefficient of the random start and stop that is not recognized is 0; and determining the response effect index in combination with the start-stop effect coefficients of all random starts and stops.

[0070] Among them, time difference is an important indicator for analyzing the start-stop effect. The absolute value of the difference between the response time of the output signal under each random start-stop and the random start-stop time is calculated, and the maximum and minimum values ​​are normalized as the start-stop time difference. The larger the value of the start-stop time difference, the greater the difference between the corresponding start-stop time and the actual situation, the worse the start-stop effect, and the smaller the value of the start-stop effect coefficient. Therefore, the difference between the recognition difficulty and the start-stop time difference is directly calculated, and the maximum and minimum values ​​are normalized as the start-stop effect coefficient for each random start-stop.

[0071] It is understandable that each random start and stop has a start and stop effect coefficient, and when the corresponding random start and stop is not identified, that is, the power supply has a random start and stop, but the arc sensor does not identify it, then its start and stop effect coefficient is set to 0.

[0072] Combined with the start-stop effect coefficients of all random starts and stops, the response effect index is determined, including: calculating the mean of the start-stop effect coefficients of all random starts and stops as the first response index; negatively correlating the standard deviations of the start-stop effect coefficients of all random starts and stops as the second response index; calculating the product of the first response index and the second response index, and normalizing the maximum and minimum values ​​as the response effect index.

[0073] Among them, the start-stop effect not only has the numerical characteristics of the start-stop effect coefficient itself, but also has the stability characteristics. Therefore, the mean of the start-stop effect coefficient of all random starts and stops is calculated as the first response index, and the first response index represents the numerical characteristics of the start-stop effect coefficient itself; the standard deviation of the start-stop effect coefficient of all random starts and stops is negatively correlated and mapped as the second response index, and the second response index is the stability characteristics of the start-stop effect coefficient itself. Therefore, the numerical characteristics and stability characteristics are combined for analysis, the product of the first response index and the second response index is calculated, and the maximum and minimum values ​​are normalized as the response effect index.

[0074] S104: Determine the optimal response index of the arc sensor under the corresponding light intensity trigger threshold in combination with the response sensitivity and the response effect index; adjust the light intensity trigger threshold, and screen out the optimal working threshold according to the optimal response index corresponding to all light intensity trigger thresholds.

[0075] Furthermore, in some embodiments of the present invention, the response sensitivity and the response effect index are combined to determine the response preference index of the arc sensor under the corresponding light intensity trigger threshold, including: taking the product of the response sensitivity and the response effect index as the response preference index.

[0076] Among them, the response sensitivity and response effect index both represent the performance of the arc sensor under the corresponding light intensity trigger threshold. Therefore, these two data can be combined for optimal analysis.

[0077] In an embodiment of the present invention, the product of the response sensitivity and the response effect index is directly calculated as the response preferred index. Of course, in other embodiments of the present invention, the sum of the response sensitivity and the response effect index can also be calculated as the response preferred index. It should be noted that since the response preferred index is used to analyze the light intensity trigger threshold, in order to achieve a more reasonable and reliable analysis effect, the maximum and minimum values ​​can be normalized after the fusion calculation of the response sensitivity and the response effect index to obtain the response preferred index, that is, the value range of the response preferred index is limited to the normalized range. Of course, it can also be limited to other fixed ranges, and there is no restriction on this.

[0078] Furthermore, in some embodiments of the present invention, the optimal working threshold is screened based on the response preference index corresponding to all light intensity trigger thresholds, including: taking the light intensity trigger threshold corresponding to the maximum response preference index value as the optimal working threshold.

[0079] Among them, when the value of the response preferred index is the largest, the corresponding light intensity trigger threshold has a better effect, so it is used as the optimal working threshold. Of course, in other embodiments of the present invention, the value range of the response preferred index can also be determined, for example, greater than 0.8, and the optimal working threshold is further screened from all light intensity trigger thresholds with response preferred index values ​​greater than 0.8, and there is no limitation on this.

[0080] The real-time monitoring steps of arc light include: arranging sensor probes at key positions in the electrical equipment or system to be protected, so as to collect data during the operation of the equipment or system. The specific steps are as follows: First, determine the installation position of the sensor probe, that is, near the main switch or electrical contact point of the switch cabinet; it should be noted that the viewing angle of the arc light detection head is 0° to 180°. When determining the installation position, it should be ensured that the probe can capture ultraviolet light and visible light when the arc occurs, and avoid the probe being blocked by other equipment or obstructions. Subsequently, the arc light probe is firmly installed at the designated position using a suitable bracket or fixture; at the same time, one end of the dedicated optical cable is connected to the optical cable interface of the probe to ensure a firm and stable connection; it should be noted that during the connection process, ensure that the optical fiber is not excessively bent, and the bending radius of the optical fiber shall not be less than 30mm to prevent damage to the optical fiber and affect signal transmission. Further, according to the structural layout of the switch cabinet, the dedicated optical cable is arranged to the photoelectric converter position of the module; it should be noted that when arranging the dedicated optical cable, it is necessary to ensure that the optical fiber line is as short and straight as possible to avoid strong bending or stretching. At the same time, connect the other end of the dedicated optical cable to the optical cable interface of the photoelectric converter to ensure a firm and stable connection; finally, start the arc sensor module to monitor the required data.

[0081] The present invention obtains the output signal irradiated by light sources of different intensities under different light intensity trigger thresholds, and conducts specific analysis from two dimensions: constant light intensity, random start and stop, and random light intensity and start and stop; wherein, under constant light intensity, periodic start and stop can analyze the response sensitivity of the arc sensor under the corresponding light intensity trigger threshold; and under the conditions of random light intensity and random start and stop, it can simulate the real operation scene, obtain the response ability of the arc sensor to the arc light, that is, obtain the response effect index; and then combine the two analysis dimensions of response sensitivity and response effect index to realize the optimal analysis of the light intensity trigger threshold, determine the response preferred index of the light intensity trigger threshold, and screen and obtain the optimal working threshold according to the response preferred index corresponding to all light intensity trigger thresholds. In summary, the present invention can adaptively select the optimal light intensity trigger threshold, thereby avoiding detection errors caused by unstable arc light, improving the overall detection effect, and enhancing the stability and reliability of arc sensor detection.

[0082] It should be noted that the sequence of the above embodiments of the present invention is only for description and does not represent the advantages and disadvantages of the embodiments. The processes depicted in the accompanying drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0083] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

Claims

1. A detection method for an arc sensor module, characterized in that: The method comprises: Obtaining the output signal of the arc sensor when it is irradiated by light sources of different intensities at any light intensity trigger threshold; Under the same light source intensity, periodically start and stop the light source, and determine the response sensitivity under the corresponding light intensity trigger threshold according to the number of changes of the output signal following the light source periodic start and stop adjustment and the periodic start and stop time; The light source is adjusted to a random intensity and randomly started and stopped, and the recognition difficulty of each random start and stop is determined according to the duration and light source intensity of each random start and stop; the response effect index of all random starts and stops is determined according to the recognition difficulty of each random start and stop and the difference between the response duration of the output signal at each random start and stop and the random start and stop duration; In combination with the response sensitivity and the response effect index, the preferred response index of the arc sensor under the corresponding light intensity trigger threshold is determined; the light intensity trigger threshold is adjusted, and the optimal working threshold is screened according to the preferred response index corresponding to all light intensity trigger thresholds.

2. The detection method of an arc sensor module according to claim 1, characterized in that: The method for acquiring the output signal irradiated by the light source comprises: The TTL pin of the arc sensor is connected to an oscilloscope, and the output signal of the TTL pin is collected via the oscilloscope.

3. The detection method of an arc sensor module according to claim 1, characterized in that: The adjustment cycle of the light source cycle start and stop adjustment is: every 10 seconds of start, stop for 1 second.

4. The detection method of an arc sensor module according to claim 1, characterized in that: Determining the response sensitivity under the corresponding light intensity trigger threshold according to the number of changes of the output signal following the periodic start and stop adjustment of the light source and the periodic start and stop time, including: Calculate the ratio of the number of changes to the number of actual light source cycle starts as the cycle start recognition ratio; Calculate the average of the time intervals between each start and stop and the actual start and stop of the light source, perform negative correlation mapping on the average, and obtain the delayed response coefficient; The product of the periodic start recognition ratio and the delayed response coefficient is normalized to the maximum and minimum values ​​as the response sensitivity.

5. The detection method of an arc sensor module according to claim 1, characterized in that: According to the duration and light intensity of each random start and stop, the recognition difficulty of the random start and stop is determined, including: Determine the sum of the start duration and the stop duration in a random start and stop as the random start and stop time; The product value of the light source intensity and the random start and stop time is calculated, negative correlation mapping is performed, and maximum and minimum value normalization processing is performed to obtain the recognition difficulty under the random start and stop.

6. The detection method of an arc sensor module according to claim 1, characterized in that: According to the recognition difficulty under each random start and stop, and the difference between the response time of the output signal under each random start and stop and the random start and stop time, the response effect index of all random starts and stops is determined, including: Calculate the absolute value of the difference between the response time of the output signal under each random start and stop and the random start and stop time, and normalize the maximum and minimum values ​​as the start time difference; Calculate the difference between the recognition difficulty and the start-up time difference, and normalize the maximum and minimum values ​​as the start-stop effect coefficient of each random start-stop, wherein the start-stop effect coefficient of the random start-stop that is not recognized is 0; The response effect index is determined by combining the start-stop effect coefficients of all random starts and stops.

7. A detection method for an arc sensor module as claimed in claim 6, characterized in that: Combine the start-stop effect coefficients of all random starts and stops to determine the response effect indicators, including: Calculate the mean of the start-stop effect coefficients of all random starts and stops as the first response indicator; The standard deviation of the start-stop effect coefficient of all random starts and stops is negatively correlated and mapped as the second response indicator; The product of the first response index and the second response index is calculated, and the maximum and minimum values ​​are normalized to be the response effect index.

8. The detection method of an arc sensor module according to claim 1, characterized in that: In combination with the response sensitivity and the response effect index, the preferred response index of the arc sensor under the corresponding light intensity trigger threshold is determined, including: The product of the response sensitivity and the response effect index is used as the response optimization index.

9. The detection method of an arc sensor module according to claim 1, characterized in that: According to the response optimization indicators corresponding to all light intensity trigger thresholds, the optimal working threshold is screened, including: The light intensity trigger threshold corresponding to the maximum value of the response optimization index is used as the optimal working threshold.

10. The arc sensor module detection method according to claim 1, characterized in that: The light intensity trigger threshold is adjusted by an adjustable resistor.

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