Anti-interference detection method and device for automobile wires and cables

Abstract

The invention discloses an anti-interference detection method and device for automobile wires and cables, and relates to the technical field of cable detection. Comprising the following steps: initial setting: setting the initial detection interference frequency and initial detection duration of a target cable and the amplification of the interference frequency after detection to obtain an initial frequency item, an initial time item and a frequency change item; and grade division: performing grade division on the detection performance of the cable through a division method to obtain a performance grade item, and setting a frequency increasing item and a time shortening item. According to the method, the detection performance of the target cable is obtained, the detection performance is subjected to grade matching, the corresponding frequency increasing item and the time reducing item are matched, the target increasing item and the target reducing item are obtained, and the frequency changing item and the initial time item are adjusted according to the target increasing item and the target reducing item; therefore, a rapid and intelligent detection effect on the anti-interference performance of the target cable is realized.

Description

Technical Field

[0001] The present invention relates to the technical field of cable detection, and in particular to an anti-interference detection method and device for automobile electric wires and cables. Background Art

[0002] Automotive wires and cables are an important part of modern automobiles. They are used to transmit power and signals to ensure the normal operation of various electronic systems in automobiles. They are divided into power lines, signal lines, communication lines, conductor materials, insulating materials, etc. Anti-interference detection of automotive wires and cables is an important part of ensuring the reliable operation of automotive electronic systems. As automobiles rely more and more on electronic control systems, electromagnetic compatibility and anti-interference capabilities are particularly important. Electromagnetic interference comes from electromagnetic waves in the external environment or other equipment, such as generators, starters, etc., which affect signals. Therefore, it is necessary to test the anti-interference properties of automotive wires and cables to improve driving safety.

[0003] Patent publication number CN116819222A is an anti-interference detection system and method for graphene composite conductor cables. Multiple second guide plates with adjustable positions are arranged inside the first protective shell and the second protective shell, so that when leakage detection is performed on cables of different thicknesses, the outer wall of the cable can be stably limited and contact-coated. In addition, combined with the setting of the metal detection strip, the contact range with the outer wall of the cable is enhanced, and then synchronous detection is performed from multiple directions of the outer wall of the cable, thereby enhancing the accuracy and efficiency of the detection of leakage on the outer wall of the cable.

[0004] In the process of detecting the anti-electromagnetic interference of cables according to the above and similar technical solutions, since the anti-interference performance of different types of cables is different, in actual detection, it is necessary to control the electromagnetic generator to emit the lowest frequency electromagnetic to interfere with the cable, and then gradually increase the frequency and time of the interfering electromagnetic. However, the gradual increase of the interfering electromagnetic frequency and time will consume a lot of time. When the anti-interference performance of the target cable is strong, it will take a long time to detect the limit value of the anti-interference performance of the target cable, resulting in high detection costs. In addition, when detecting the anti-electromagnetic interference of the cable, when the detection frequency of the cable is gradually increased according to the set frequency, the frequency span cannot be adjusted in a targeted manner according to the specific performance of the target cable, which will lead to the situation that the limit value of the target cable cannot be accurately detected. Summary of the invention

[0005] The object of the present invention is to provide an anti-interference detection method and device for automotive wires and cables to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solution: an anti-interference detection method and device for automotive wires and cables, comprising:

[0007] Initial setting: Set the initial detection interference frequency of the target cable, the initial detection duration, and the increase in the interference frequency after the detection is completed, and obtain the initial frequency item, initial time item, and frequency change item;

[0008] Grade division: The detection performance of the cable is divided into grades through the division method to obtain performance grade items, and the frequency increase item and the time reduction item are set. The frequency increase item and the time reduction item correspond to the performance grade items of different grades respectively. Multiple frequency increase items and time reduction items corresponding to the performance grade items are set to achieve the effect of multiple detection methods;

[0009] Cable detection: The target cable is connected to the power supply through the first target device, and the detection performance of the target cable is obtained through the second target device to obtain the real-time signal item, and the real-time signal item is matched in level through the matching method;

[0010] Detection adjustment: The frequency change item and the initial time item are adjusted through the adjustment method, and the target cable is detected according to the adjusted detection frequency and detection time, so as to achieve a fast and targeted detection effect on the anti-interference performance of the target cable;

[0011] The adjustment method comprises:

[0012] Step 1: Target matching: matching the corresponding frequency increasing term and time reducing term based on the real-time signal term to obtain the target increasing term and the target reducing term;

[0013] Step 2: Set adjustment, adjust the frequency change item based on the target increment item to obtain the real-time frequency item, and adjust the initial time item based on the target reduction item to obtain the real-time time item;

[0014] Step 3: Set up execution, detect the target frequency of the target cable based on the combined result of the real-time frequency item and the initial frequency item, detect the target time of the target cable based on the real-time time item, and obtain the secondary performance item of the target cable;

[0015] Step 4: Repeat the steps, repeat steps 1 to 3 based on the secondary performance items, and repeat the detection of the target cable.

[0016] Furthermore, the detection performance of the cable includes a drop performance, and the classification method includes:

[0017] S1: first basic amplitude acquisition, acquiring the signal amplitude of the target cable based on the initial frequency term and the initial time term to obtain the first amplitude term;

[0018] S2: setting a first threshold, setting a first threshold, obtaining an amplitude difference term based on a combination result of the first threshold and the first amplitude term, obtaining a secondary difference term based on a combination result of the amplitude difference term and the first threshold, repeating the steps to obtain a difference combination set, the difference combination set including at least one secondary difference term;

[0019] S3: Preliminary grading: grading the detection performance of the cable based on the difference combination set to obtain performance grade items. Different grades of performance grade items correspond to different amplitude difference items and secondary difference items.

[0020] Furthermore, the matching method includes: based on the real-time signal item, obtaining the actual drop performance of the target cable, obtaining the actual amplitude value, judging the comparison relationship between the actual amplitude value and the difference combination set, when the actual amplitude value is between the first amplitude item and the amplitude difference item, the real-time signal item is at the first level, when the actual amplitude value is between the amplitude difference item and the first secondary difference item, the real-time signal item is at the second level, repeating this step to match the level of the real-time signal item.

[0021] Furthermore, the detection performance of the cable includes amplitude performance, and the classification method includes:

[0022] M1: second basic amplitude acquisition, obtain the signal fluctuation amplitude of the target cable based on the initial frequency term and the initial time term, and obtain the second amplitude term;

[0023] M2: second threshold setting, setting the second threshold, obtaining a fluctuation difference term based on the combination result of the second threshold and the second amplitude term, obtaining a secondary fluctuation term based on the combination result of the fluctuation difference term and the second threshold, repeating the steps to obtain a fluctuation combination set, the fluctuation combination set includes at least one secondary fluctuation term;

[0024] M3: Secondary grading: based on the fluctuation combination set, the cable detection performance is graded to obtain performance grade items. Different levels of performance grade items correspond to different fluctuation difference items and secondary fluctuation items.

[0025] Furthermore, the matching method includes: based on the real-time signal item, obtaining the actual amplitude performance of the target cable, obtaining the actual amplitude value, judging the comparison relationship between the actual amplitude value and the fluctuation combination set, when the actual amplitude value is between the second amplitude item and the fluctuation difference item, the real-time signal item is at the first level, when the actual amplitude value is between the fluctuation difference item and the first secondary fluctuation item, the real-time signal item is at the second level, repeating this step to match the level of the real-time signal item.

[0026] Furthermore, the detection performance of the cable includes noise performance, and the classification method includes:

[0027] X1: third basic amplitude acquisition, obtaining the number of signal noise points of the target cable based on the initial frequency term and the initial time term, and obtaining the third amplitude term;

[0028] X2: setting the third threshold, setting the third threshold, obtaining the noise difference term based on the combination result of the third threshold and the third amplitude term, obtaining the secondary noise term based on the combination result of the noise difference term and the third threshold, repeating the steps to obtain a noise combination set, the noise combination set includes at least one secondary noise term;

[0029] X3: Tertiary classification, based on the noise combination set, the cable detection performance is classified into grades to obtain performance grade items. Different grades of performance grade items correspond to different noise difference items and secondary noise items.

[0030] Furthermore, the matching method includes: based on the real-time signal item, obtaining the actual noise performance of the target cable, obtaining the actual noise value, judging the comparison relationship between the actual noise value and the noise combination set, when the actual noise value is between the third amplitude item and the noise difference item, the real-time signal item is at the first level, when the actual amplitude value is between the noise difference item and the first secondary noise item, the real-time signal item is at the second level, repeating this step to match the level of the real-time signal item.

[0031] Furthermore, the first target device includes a power generator, the target cable is provided with hardware information data, parameter data of the target cable is obtained based on the hardware information data, rated parameters of the power generator are adjusted based on the parameter data, and the positive and negative poles of the power generator are respectively connected to the target cable.

[0032] Furthermore, the second target device includes an oscilloscope, the oscilloscope includes a probe assembly and a display assembly, and the probe assembly is connected to the output end of the target cable.

[0033] Furthermore, an anti-interference detection device for automobile wires and cables uses the above-mentioned anti-interference detection method for automobile wires and cables.

[0034] Compared with the prior art, the present invention has the following beneficial effects:

[0035] The anti-interference detection method and device for automobile wires and cables sets the initial detection interference frequency, initial detection duration and the increase of the interference frequency after the detection of the target cable, and divides the detection performance of the cable into levels, sets the frequency increase item and the time reduction item, and the frequency increase item and the time reduction item correspond to the performance level items of different levels respectively. In the actual process of detecting the cable, the detection performance of the target cable is obtained, and the detection performance is matched in level, and the corresponding frequency increase item and time reduction item are matched to obtain the target increase item and the target reduction item. The frequency change item and the initial time item are adjusted according to the target increase item and the target reduction item, thereby achieving a fast and intelligent detection effect of the anti-interference property of the target cable.

[0036] At the same time, the frequency change is increased and the detection time is reduced according to the actual performance of the target cable to shorten the detection time and reduce the detection cost. In addition, the frequency change is reduced and the detection time is increased according to the actual performance of the target cable, so that cables with poor performance or poor anti-interference can be tested more carefully to improve the accuracy of the test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a schematic diagram of the relationship between the initial setting, grade classification, cable detection and detection adjustment of the present invention;

[0038] Figure 2 It is a schematic flow chart of the adjustment method of the present invention;

[0039] Figure 3 It is a schematic diagram of signal amplitude of the present invention;

[0040] Figure 4 It is a schematic diagram of the signal amplitude of the present invention;

[0041] Figure 5 Schematic diagram of the number of noise points of the present invention. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] After the cable is energized, the anti-interference performance of the cable is tested by applying an interfering electromagnetic field. However, the specific operation requires first interfering with the lowest electromagnetic field and then gradually increasing the intensity of the interfering electromagnetic field. The cables involved in the test have different anti-interference capabilities due to their different working properties. When the anti-interference capability of an individual cable is high, the process of increasing the intensity of the interfering electromagnetic field will be infinitely amplified, thereby increasing the detection cost. The technical solution provided by the present application obtains the initial frequency item, the initial time item and the frequency change item by setting the initial detection interference frequency, the initial detection duration and the increase in the interference frequency after the detection of the target cable, and divides the detection performance of the cable into levels, sets the frequency increase item and the time reduction item, and the frequency increase item and the time reduction item are respectively related to different levels. Corresponding to the performance level item, multiple frequency increasing items and time shortening items corresponding to the performance level items are set, thereby achieving the effects of multiple detection methods. In the actual process of cable detection, the detection performance of the target cable is obtained, and the detection performance is graded to match the corresponding frequency increasing items and time shortening items to obtain the target increasing items and the target shortening items. The frequency changing items and the initial time items are adjusted according to the target increasing items and the target shortening items. The target frequency is detected on the target cable according to the combined result of the adjusted real-time frequency items and the initial frequency items. The target time is detected on the target cable based on the real-time time item to obtain the secondary performance item of the target cable. The frequency increasing items and the time shortening items are re-matched based on the secondary performance, thereby achieving the rapid detection effect of the anti-interference of the target cable.

[0044] like Figure 1-Figure 2As shown, the present invention provides a technical solution: an anti-interference detection method and device for automotive wires and cables, including: initial setting: setting the initial detection interference frequency, initial detection duration and the increase in the interference frequency after the detection of the target cable, and obtaining the initial frequency item, the initial time item and the frequency change item; level division: dividing the detection performance of the cable into levels through the division method, obtaining the performance level item, setting the frequency increase item and the time reduction item, the frequency increase item and the time reduction item respectively corresponding to the performance level items of different levels, and setting a plurality of frequency increase items and time reduction items corresponding to the performance level items to achieve the effect of multiple detection methods; cable detection: connecting the target cable to electricity through the first target device, obtaining the detection performance of the target cable through the second target device, obtaining the real-time signal item, and matching the real-time signal item by the matching method; detection adjustment: adjusting The method adjusts the frequency change item and the initial time item, and detects the target cable according to the adjusted detection frequency and detection time, so as to achieve a rapid and targeted detection effect on the anti-interference performance of the target cable; the adjustment method comprises: step one: target matching, matching the corresponding frequency increasing item and time reducing item based on the real-time signal item, and obtaining the target increasing item and the target reducing item; step two: setting adjustment, adjusting the frequency change item based on the target increasing item to obtain the real-time frequency item, and adjusting the initial time item based on the target reducing item to obtain the real-time time item; step three: setting execution, detecting the target frequency of the target cable based on the combination result of the real-time frequency item and the initial frequency item, and detecting the target time of the target cable based on the real-time time item, and obtaining the secondary performance item of the target cable; step four: step repetition, repeating steps one to three based on the secondary performance item, and repeatedly detecting the target cable.

[0045] It should be noted that the initial detection interference frequency is 100MHz, which is a commonly used interference frequency that can simulate the operating frequencies of common electromagnetic interference sources in automotive electronic systems, such as wireless communication equipment and radar. The initial detection duration is 30s, which is enough to observe the stability of the cable and signal changes under interference. At the same time, it will not be too long to cause equipment overheating or other unnecessary effects. After the detection is completed, the interference frequency increase is 10MHz, and the initial frequency item is 100MHz, the initial time item is 30s, and the frequency change item is 10MHz.

[0046] It should be noted that the detection performance of the cable is divided into four levels, namely good, normal, poor and extreme, and the set frequency increase item and time reduction item are 50%, 0 and -50% respectively, corresponding to the three levels of good, normal and poor respectively. The target cable is powered on by the first target device, and the second target device obtains the detection performance of the target cable, and matches the level according to the detection performance, matches the frequency increase item and time reduction item corresponding to the detection performance level, and adjusts the frequency change item and the initial time item according to the corresponding frequency increase item and time reduction item. The target cable is detected according to the adjusted frequency and time, and the secondary performance of the target cable is obtained again. The level is matched again according to the secondary performance, and the frequency increase item and time reduction item corresponding to the detection performance level are matched, and the frequency change item and the initial time item are adjusted according to the corresponding frequency increase item and time reduction item. The cable is repeatedly tested until the target cable performance is at the extreme level.

[0047] In the specific implementation process, a certain cable is tested. After the target cable is powered on, the target cable is tested with an initial frequency item of 100MHz, an initial time item of 30s, and a frequency change item of 10MHz. After the test is completed, the performance level of the target cable is obtained to be good. At this time, the matching frequency increase item and time reduction item are 50%. The frequency change item and the initial time item are adjusted respectively. The adjusted frequency is 15MHz, and the adjusted time is 15s. That is, under the premise of the initial frequency item, the target cable is tested for the second time with a frequency change of 115MHz and a time of 15s. After the second test, the secondary performance level of the target cable is obtained to be good. At this time, the matching frequency increase item and the time reduction item are adjusted to 50%. The item and time shortening item are still 50%, the adjusted frequency is 15MHz, the adjusted time is 15s, the target cable is tested three times with a frequency change of 130MHz and a time of 15s. After three tests, the three performance levels of the target cable are normal. At this time, the matching frequency increase item and time shortening item are 0, the adjusted frequency is 10MHz, and the adjusted time is 30s. The target cable is tested four times with a frequency change of 140MHz and a time of 30s until the performance level of the target cable reaches the limit and the test is completed. According to the actual performance of the target cable, the frequency change is increased and the test time is reduced to shorten the test time and reduce the test cost.

[0048] In a specific implementation process, a certain cable is tested. After the target cable is powered on, the target cable is tested with an initial frequency item of 100 MHz, an initial time item of 30 s, and a frequency change item of 10 MHz. After the test is completed, the performance level of the target cable is normal. At this time, the matching frequency increase item and time reduction item are 0. The frequency change item and the initial time item are adjusted respectively. The adjusted frequency is 10 MHz, and the adjusted time is 30 s. That is, under the premise of the initial frequency item, the target cable is tested for a second time with a frequency change of 110 MHz and a time of 30 s. After the second test, the secondary performance level of the target cable is poor. At this time, the matching frequency increase item and time reduction item are -50%, the adjusted frequency is 5 MHz, and the adjusted time is 45 s. The target cable is tested three times with a frequency change of 115 MHz and a time of 45 s until the performance level of the target cable is the limit and the test is completed. According to the actual performance of the target cable, the frequency change is reduced and the test time is increased. A more detailed test can be performed on cables with poor performance or poor anti-interference performance, thereby improving the accuracy of the test results.

[0049] The detection performance of the cable includes the drop performance, and the division method includes: S1: first basic amplitude acquisition, obtaining the signal amplitude of the target cable based on the initial frequency item and the initial time item to obtain the first amplitude item; S2: first threshold setting, setting the first threshold, obtaining the amplitude difference item based on the combination result of the first threshold and the first amplitude item, obtaining the secondary difference item based on the combination result of the amplitude difference item and the first threshold, repeating the steps to obtain a difference combination set, the difference combination set includes at least one secondary difference item; S3: preliminary level division, dividing the detection performance of the cable into levels based on the difference combination set to obtain performance level items, and different levels of performance level items correspond to different amplitude difference items and secondary difference items.

[0050] It should be noted that as the interference frequency gradually increases, the signal amplitude obtained by the second acquisition device passing through the target cable will gradually decrease, which means that the increase in interference frequency gradually affects the normal data flow of the target cable. First, the signal amplitude of the target cable in the initial frequency item and the initial time item is 100%, and the first threshold is set. The first threshold is 15%. At this time, the combination result of the first threshold and the first amplitude item is 85%, that is, the amplitude difference item is 85%, and the combination result of the amplitude difference item and the first threshold is 70%, that is, the secondary difference item is 70%. Since the detection performance of the cable is divided into four levels, namely good, normal, poor and extreme, the amplitude difference items and secondary difference items corresponding to different performance levels are: 100%-85%, 84%-70%, 69%-55% and less than 55%, respectively.

[0051] like Figure 3As shown, in a specific implementation process, a certain cable is detected. During the first detection, the second acquisition device obtains a signal amplitude of 100% through the target cable, and the grade is good. During the second detection, the second acquisition device obtains a signal amplitude of 100% through the target cable, and the grade is good. During the third detection, the second acquisition device obtains a signal amplitude of 90% through the target cable, and the grade is good. During the fourth detection, the second acquisition device obtains a signal amplitude of 80% through the target cable, and the grade is normal. During the fifth detection, the second acquisition device obtains a signal amplitude of 70% through the target cable, and the grade is normal. During the sixth detection, the second acquisition device obtains a signal amplitude of 60% through the target cable, and the grade is poor. During the seventh detection, the second acquisition device obtains a signal amplitude of 50% through the target cable, and the grade is extreme.

[0052] The matching method includes: based on the real-time signal item, obtaining the actual drop performance of the target cable, obtaining the actual amplitude value, judging the comparison relationship between the actual amplitude value and the difference combination set, when the actual amplitude value is between the first amplitude item and the amplitude difference item, the real-time signal item is at the first level, when the actual amplitude value is between the amplitude difference item and the first secondary difference item, the real-time signal item is at the second level, repeating this step to match the level of the real-time signal item.

[0053] The detection performance of the cable includes amplitude performance, and the division method includes: M1: second basic amplitude acquisition, obtaining the signal fluctuation amplitude of the target cable based on the initial frequency item and the initial time item, and obtaining the second amplitude item; M2: second threshold setting, setting the second threshold, and obtaining the fluctuation difference item based on the combination result of the second threshold and the second amplitude item, and obtaining the secondary fluctuation item based on the combination result of the fluctuation difference item and the second threshold, and repeating the steps to obtain a fluctuation combination set, and the fluctuation combination set includes at least one secondary fluctuation item; M3: secondary level division, based on the fluctuation combination set, the detection performance of the cable is divided into levels to obtain performance level items, and different levels of performance level items correspond to different fluctuation difference items and secondary fluctuation items.

[0054] It should be noted that as the interference frequency gradually increases, the signal amplitude obtained by the second acquisition device passing through the target cable will gradually increase, which means that the increase in interference frequency gradually affects the normal data flow of the target cable. First, the signal amplitude of the target cable in the initial frequency item and the initial time item is obtained, and the second threshold is set. The second threshold is 5%. Since the signal amplitude is generated by alternating sine and cosine, when the amplitude exceeds 5%, it is a fluctuation difference item. When the amplitude exceeds 5% and is lower than 10%, it is a secondary fluctuation item. Since the detection performance of the cable is divided into four levels, namely good, normal, poor and extreme, the fluctuation difference items and secondary fluctuation items corresponding to different performance levels are: ≤5%, 5%-10%, 11%-15% and higher than 15%, respectively.

[0055] like Figure 4 As shown, in a specific implementation process, a certain cable is tested. During the first test, the second acquisition device obtains a signal amplitude of 0 passing through the target cable, and the level is good. During the second test, the second acquisition device obtains a signal amplitude of 0 passing through the target cable, and the level is good. During the third test, the second acquisition device obtains a signal amplitude of 5% passing through the target cable, and the level is good. During the fourth test, the second acquisition device obtains a signal amplitude of 9% passing through the target cable, and the level is normal. During the fifth test, the second acquisition device obtains a signal amplitude of 16% passing through the target cable, and the level is extreme.

[0056] The matching method includes: based on the real-time signal item, obtaining the actual amplitude performance of the target cable, obtaining the actual amplitude value, judging the comparison relationship between the actual amplitude value and the fluctuation combination set, when the actual amplitude value is between the second amplitude item and the fluctuation difference item, the real-time signal item is at the first level, when the actual amplitude value is between the fluctuation difference item and the first secondary fluctuation item, the real-time signal item is at the second level, repeating this step to match the level of the real-time signal item.

[0057] The detection performance of the cable includes noise performance, and the division method includes: X1: third basic amplitude acquisition, obtaining the number of signal noise points of the target cable based on the initial frequency item and the initial time item, and obtaining the third amplitude item; X2: third threshold setting, setting the third threshold, and obtaining the noise difference item based on the combination result of the third threshold and the third amplitude item, and obtaining the secondary noise item based on the combination result of the noise difference item and the third threshold, and repeating the steps to obtain a noise combination set, and the noise combination set includes at least one secondary noise item; X3: tertiary level division, based on the noise combination set, the detection performance of the cable is divided into levels to obtain performance level items, and different levels of performance level items correspond to different noise difference items and secondary noise items.

[0058] It should be noted that as the interference frequency gradually increases, the signal noise points obtained by the second acquisition device through the target cable will gradually increase, which means that the increase in interference frequency gradually affects the normal data flow of the target cable. First, the signal noise points of the target cable in the initial frequency item and the initial time item are obtained, and the third threshold is set. The third threshold is 20%. Since the signal noise point is the peak point suddenly generated when the signal fluctuates, when the number of peak points is within 20%, it is a noise difference item. When the number of peak points is between 20%-40%, it is a secondary noise item. Since the detection performance of the cable is divided into four levels, namely good, normal, poor and extreme, the noise difference items and secondary noise items corresponding to different performance levels are respectively <20%, 20%-40%, 41%-60% and above 60%.

[0059] like Figure 5 As shown, in a specific implementation process, a certain cable is tested. During the first test, the second acquisition device obtains that the number of noise points passing through the target cable increases to 0, and the level is good. During the second test, the second acquisition device obtains that the number of noise points passing through the target cable increases to 10%, and the level is good. During the third test, the second acquisition device obtains that the number of noise points passing through the target cable increases to 10%, and the level is good. During the fourth test, the second acquisition device obtains that the number of noise points passing through the target cable increases to 20%, and the level is normal. During the fifth test, the second acquisition device obtains that the number of noise points passing through the target cable increases to 20%, and the level is normal. The acquisition device obtained that the number of noise points passing through the target cable increased by 30%, which is a normal level. During the sixth detection, the second acquisition device obtained that the number of noise points passing through the target cable increased by 40%, which is a normal level. During the seventh detection, the second acquisition device obtained that the number of noise points passing through the target cable increased by 50%, which is a poor level. During the eighth detection, the second acquisition device obtained that the number of noise points passing through the target cable increased by 60%, which is a poor level. During the ninth detection, the second acquisition device obtained that the number of noise points passing through the target cable increased by 70%, which is an extreme level.

[0060] The matching method includes: based on the real-time signal item, obtaining the actual noise performance of the target cable, obtaining the actual noise value, judging the comparison relationship between the actual noise value and the noise combination set, when the actual noise value is between the third amplitude item and the noise difference item, the real-time signal item is at the first level, when the actual amplitude value is between the noise difference item and the first secondary noise item, the real-time signal item is at the second level, repeating this step to match the level of the real-time signal item.

[0061] The first target device includes a power generator, the target cable is provided with hardware information data, parameter data of the target cable is obtained based on the hardware information data, rated parameters of the power generator are adjusted based on the parameter data, and the positive and negative poles of the power generator are respectively connected to the target cable.

[0062] The second target device includes an oscilloscope, which includes a probe assembly and a display assembly, and the probe assembly is connected to the output end of the target cable.

[0063] An anti-interference detection device for automobile wires and cables uses the above-mentioned anti-interference detection method for automobile wires and cables.

[0064] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is limited by the attached embodiments and their equivalents.

Claims

1. An anti-interference detection method for automotive wires and cables, characterized in that: include: Initial setting: Set the initial detection interference frequency of the target cable, the initial detection duration, and the increase in the interference frequency after the detection is completed, and obtain the initial frequency item, initial time item, and frequency change item; Grade division: The detection performance of the cable is divided into grades through the division method to obtain performance grade items, and the frequency increase item and the time reduction item are set. The frequency increase item and the time reduction item correspond to the performance grade items of different grades respectively. Multiple frequency increase items and time reduction items corresponding to the performance grade items are set to achieve the effect of multiple detection methods; Cable detection: The target cable is connected to the power supply through the first target device, and the detection performance of the target cable is obtained through the second target device to obtain the real-time signal item, and the real-time signal item is matched in level through the matching method; Detection adjustment: The frequency change item and the initial time item are adjusted through the adjustment method, and the target cable is detected according to the adjusted detection frequency and detection time, so as to achieve a fast and targeted detection effect on the anti-interference performance of the target cable; The adjustment method comprises: Step 1: Target matching: matching the corresponding frequency increasing term and time reducing term based on the real-time signal term to obtain the target increasing term and the target reducing term; Step 2: Set adjustment, adjust the frequency change item based on the target increment item to obtain the real-time frequency item, and adjust the initial time item based on the target reduction item to obtain the real-time time item; Step 3: Set up execution, detect the target frequency of the target cable based on the combined result of the real-time frequency item and the initial frequency item, detect the target time of the target cable based on the real-time time item, and obtain the secondary performance item of the target cable; Step 4: Repeat the steps, repeat steps 1 to 3 based on the secondary performance items, and repeat the detection of the target cable.

2. The anti-interference detection method for automotive wires and cables according to claim 1, characterized in that: The detection performance of the cable includes the drop performance, and the classification method includes: S1: first basic amplitude acquisition, acquiring the signal amplitude of the target cable based on the initial frequency term and the initial time term to obtain the first amplitude term; S2: setting a first threshold, setting a first threshold, obtaining an amplitude difference term based on a combination result of the first threshold and the first amplitude term, obtaining a secondary difference term based on a combination result of the amplitude difference term and the first threshold, repeating the steps to obtain a difference combination set, the difference combination set including at least one secondary difference term; S3: Preliminary grading: grading the detection performance of the cable based on the difference combination set to obtain performance grade items. Different grades of performance grade items correspond to different amplitude difference items and secondary difference items.

3. The anti-interference detection method for automotive wires and cables according to claim 2 is characterized in that: The matching method includes: based on the real-time signal item, obtaining the actual drop performance of the target cable, obtaining the actual amplitude value, judging the comparison relationship between the actual amplitude value and the difference combination set, when the actual amplitude value is between the first amplitude item and the amplitude difference item, the real-time signal item is at the first level, when the actual amplitude value is between the amplitude difference item and the first secondary difference item, the real-time signal item is at the second level, repeating this step to match the level of the real-time signal item.

4. The anti-interference detection method for automotive wires and cables according to claim 1, characterized in that: The detection performance of the cable includes amplitude performance, and the classification method includes: M1: second basic amplitude acquisition, obtain the signal fluctuation amplitude of the target cable based on the initial frequency term and the initial time term, and obtain the second amplitude term; M2: second threshold setting, setting the second threshold, obtaining a fluctuation difference term based on the combination result of the second threshold and the second amplitude term, obtaining a secondary fluctuation term based on the combination result of the fluctuation difference term and the second threshold, repeating the steps to obtain a fluctuation combination set, the fluctuation combination set includes at least one secondary fluctuation term; M3: Secondary grading: based on the fluctuation combination set, the cable detection performance is graded to obtain performance grade items. Different levels of performance grade items correspond to different fluctuation difference items and secondary fluctuation items.

5. The anti-interference detection method for automotive wires and cables according to claim 4 is characterized in that: The matching method includes: based on the real-time signal item, obtaining the actual amplitude performance of the target cable, obtaining the actual amplitude value, judging the comparison relationship between the actual amplitude value and the fluctuation combination set, when the actual amplitude value is between the second amplitude item and the fluctuation difference item, the real-time signal item is at the first level, when the actual amplitude value is between the fluctuation difference item and the first secondary fluctuation item, the real-time signal item is at the second level, repeating this step to match the level of the real-time signal item.

6. The anti-interference detection method for automotive wires and cables according to claim 1, characterized in that: The detection performance of the cable includes noise performance, and the classification method includes: X1: third basic amplitude acquisition, obtaining the number of signal noise points of the target cable based on the initial frequency term and the initial time term, and obtaining the third amplitude term; X2: setting the third threshold, setting the third threshold, obtaining the noise difference term based on the combination result of the third threshold and the third amplitude term, obtaining the secondary noise term based on the combination result of the noise difference term and the third threshold, repeating the steps to obtain a noise combination set, the noise combination set includes at least one secondary noise term; X3: Tertiary classification, based on the noise combination set, the cable detection performance is classified into grades to obtain performance grade items. Different grades of performance grade items correspond to different noise difference items and secondary noise items.

7. The anti-interference detection method for automotive wires and cables according to claim 6, characterized in that: The matching method includes: based on the real-time signal item, obtaining the actual noise performance of the target cable, obtaining the actual noise value, judging the comparison relationship between the actual noise value and the noise combination set, when the actual noise value is between the third amplitude item and the noise difference item, the real-time signal item is at the first level, when the actual amplitude value is between the noise difference item and the first secondary noise item, the real-time signal item is at the second level, repeating this step, and matching the levels of the real-time signal items.

8. The anti-interference detection method for automotive wires and cables according to claim 1, characterized in that: The first target device includes a power generator, the target cable is provided with hardware information data, parameter data of the target cable is obtained based on the hardware information data, rated parameters of the power generator are adjusted based on the parameter data, and the positive and negative poles of the power generator are respectively connected to the target cable.

9. The anti-interference detection method for automotive wires and cables according to claim 1, characterized in that: The second target device includes an oscilloscope, which includes a probe assembly and a display assembly, and the probe assembly is connected to the output end of the target cable. 10.An anti-interference detection device for automotive wires and cables, characterized in that: An anti-interference detection method for automotive wires and cables as described in any one of claims 1 to 9 is used.

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