Non-destructive testing methods, systems, and electronic equipment based on dedicated vehicle area communication

Abstract

The present invention discloses a nondestructive testing method, system and electronic equipment based on special vehicle area communication, and belongs to the technical field of advanced manufacturing industry. The method comprises the following steps: dividing the nondestructive test based on special vehicle area communication into a first dimension test and a second dimension test; setting a plurality of test points in the special vehicle area, and the distance between each test point and the vehicle increases exponentially; using the test vehicle as a signal source, and installing the same receiver at each test point; performing a first dimension test to obtain a first dimension test result; performing a second dimension test to obtain a second dimension test result; and evaluating the communication performance of the special vehicle area communication according to the first dimension test result and the second dimension test result. The present invention comprehensively evaluates the resistance of vehicle area communication to interference under various interferences by using the anti-interference capability evaluation value calculation formula.

Description

Technical Field

[0001] The present invention relates to the technical field of advanced manufacturing industry, and in particular to a non-destructive testing method, system and electronic equipment based on special vehicle regional communication. Background Art

[0002] Special vehicle area communication refers to a special communication vehicle area system established for special vehicles operating in a specific area. This communication vehicle area system is designed to improve the communication efficiency, safety and collaborative working ability of these vehicles when performing tasks. In practical applications, special vehicle area communication is of great significance to ensuring public safety and improving social operation efficiency.

[0003] Existing non-destructive vehicle inspection technology is achieved through ultrasonic testing, X-ray testing, magnetic particle testing, penetration testing and eddy current testing methods. It is a detection method that inspects internal and surface defects without destroying the performance of the object being tested or damaging the internal structure of the object being tested. With the continuous emergence of new materials and new processes, non-destructive testing technology will usher in a broader space for development.

[0004] For example, the invention patent with announcement number CN106813702B announces a test device and system for a communication recording device, including: sending a first control instruction and a second control instruction through a control unit; generating LKJ simulation information according to the first control instruction by an LKJ simulation unit, and sending it to the communication recording device under test; then generating detection information of other function detection units in a locomotive safety information comprehensive monitoring device according to the second control instruction by an operating environment simulation unit and sending it to the communication recording device under test, and analyzing and comparing the return information of the communication recording device under test, and obtaining test data according to the results of the analysis and comparison; then the control unit analyzes the test data and the dump data of the communication recording device under test, and when it is determined that the test data and the dump data are consistent, obtaining a detection result that the communication function of the communication recording device under test is normal and sending it to the display unit to display the detection result; thereby realizing automatic testing of the communication recording device and ensuring the quality of the communication recording device.

[0005] For example, the patent application with publication number CN113029223A discloses a detection device for batch detection sensors based on network communication, including: an Internet of Things test platform and a communication mode conversion device, wherein the Internet of Things test platform includes a recording unit, a communication unit and a test unit, the recording unit is used to record the device information of the sensor to be tested, the auxiliary device and the sensor to be tested are connected to the communication unit through the network device based on the network communication interface and are connected to the communication unit by the network connection and perform data exchange, the test unit controls the auxiliary device through the network communication interface of the communication unit based on the test task to establish a test environment for the sensor to be tested and receive the data information of the sensor to be tested in the test environment and receive the feedback information of the auxiliary device to obtain the test result, and the communication mode conversion device is used to convert the communication mode of each sensor to be tested into a network port mode. In this way, a variety of sensors to be tested can be detected with high detection efficiency.

[0006] However, in the process of implementing the technical solution of the invention in the embodiments of the present application, the present application found that the above technology has at least the following technical problems:

[0007] In existing non-destructive testing technologies, testing of dedicated vehicle area communications is often limited to a single-dimensional performance evaluation, such as only considering signal strength or only considering interference effects, resulting in the problem that the tested vehicle area communication performance is not comprehensive and accurate enough. Summary of the invention

[0008] The present invention solves the problem that current tests on special vehicle area communications are often limited to performance evaluation in a single dimension, resulting in the test vehicle area communication performance being not comprehensive and accurate enough, by providing a non-destructive testing method, system and electronic equipment based on special vehicle area communications. It achieves the evaluation of the communication performance of vehicle area communications at different distances and the communication performance when subject to different interferences at a fixed distance.

[0009] The present invention provides a non-destructive testing method based on dedicated vehicle area communication, comprising the following steps: dividing the non-destructive testing based on dedicated vehicle area communication into a first dimension test and a second dimension test; setting a plurality of test points in the dedicated vehicle area, with the distance between each test point and the vehicle increasing exponentially; using the test vehicle as a signal source, and installing the same receiver at each test point; performing a first dimension test to obtain a first dimension test result; performing a second dimension test to obtain a second dimension test result; and evaluating the communication performance of the dedicated vehicle area communication according to the first dimension test result and the second dimension test result; the step of performing the first dimension test to obtain the first dimension test result comprises: obtaining a signal strength parameter of the signal source, using the test points set in the dedicated vehicle area, repeatedly measuring and recording the signal strength parameter of the signal source, the signal strength parameter, the channel effective bandwidth parameter, and the channel interference parameter at each test point; calculating the average value and standard deviation of the signal strength parameter, the channel effective bandwidth parameter, and the channel interference parameter recorded multiple times, evaluating the stability and reliability of the data, and if the standard deviation is within the set threshold, using the average value as the first dimension parameter obtained; and evaluating the communication performance of the dedicated vehicle area communication according to the first dimension test result and the second dimension test result. dimension parameters, create a communication rate evaluation value calculation formula to evaluate the communication rate of the dedicated vehicle area communication signal at different distances, and obtain the first dimension test result; the step of performing the second dimension test and obtaining the second dimension test result includes: first, selecting a test point in the dedicated vehicle area and fixing an interference source in its area; using the interference source to perform static interference and dynamic interference on the communication in the test point area respectively; counting the total number of code elements sent to the test point area communication at the signal source; measuring the communication signal in the test point area after interference for multiple times at the receiving end, obtaining the frequency band bandwidth parameter, signal strength parameter, and channel interference parameter of the test point, and calculating their average values ​​as the second dimension parameters; according to the second dimension parameters, using the communication rate evaluation value calculation formula to calculate the evaluation value of the communication rate of the test point under different interferences; directly measuring the power of the signal and noise at the receiving end, and statistically recording the number of error code elements; according to the signal-to-noise ratio, bit error rate, communication rate when not interfered with, and communication rate after different interferences of the test point, creating an anti-interference ability evaluation value calculation formula to evaluate the resistance of the communication rate of the dedicated vehicle area communication to interference, and obtain the second dimension test result.

[0010] Furthermore, the non-destructive test based on dedicated vehicle area communication is divided into first dimension test and second dimension test, wherein: the first dimension test is the communication test performance of the dedicated vehicle area communication signal at different distances, and the second dimension test is the communication test performance of the dedicated vehicle area communication signal when subjected to different interferences at a fixed distance.

[0011] Furthermore, the signal strength parameters of the signal source are obtained, and the signal strength parameters of the signal source are measured and recorded multiple times using the test points set in the dedicated vehicle area. The steps of the signal strength parameters, channel effective bandwidth parameters, and channel interference parameters at each test point include: measuring the amplitude of the signal in the signal source according to the spectrum analyzer as the signal strength parameter of the signal source, measuring the amplitude of the signal at the test points set in the dedicated vehicle area as the signal strength parameter of the test point; obtaining the spectrum diagram at each test point through the spectrum analyzer, and determining the effective bandwidth of the signal according to the signal amplitude and the noise threshold; obtaining the channel interference parameters of the test point by observing the degree of interference of adjacent channels on the target channel through the spectrum diagram; measuring and recording the signal strength parameters of the signal source multiple times, the signal strength parameters, channel effective bandwidth parameters, and channel interference parameters at each test point.

[0012] Furthermore, the communication rate evaluation value calculation formula is:

[0013] ;

[0014] In the formula, Indicates the communication rate evaluation value under this test point. Indicates the weight of the signal strength to the communication rate at this test point. Indicates the weight of the channel to the communication rate at this test point, The weight coefficient representing the impact of channel interference on channel bandwidth, Indicates the signal strength parameter of the signal source, Indicates the signal strength parameters at the test point. Indicates the effective bandwidth parameters of the channel under this test point. Represents the channel bandwidth parameter for dedicated vehicle area communication.

[0015] Furthermore, the anti-interference capability evaluation value calculation formula is:

[0016] ;

[0017] In the formula, Indicates the evaluation value of the test point communication's resistance to interference, represents the weight of the signal-to-noise ratio, Indicates the weight of the communication rate, represents the weight of the bit error rate, represents the signal-to-noise ratio, where S represents the power of the communication signal and N represents the noise power. Indicates the estimated value of the communication rate of the test point under normal circumstances, Indicates the estimated value of the communication rate of the test point when interference exists. represents the bit error rate, where Indicates the number of error code elements received by the receiving end. Indicates the total number of code elements obtained by the signal source.

[0018] Furthermore, the steps of using interference sources to perform static interference and dynamic interference on the communication in the test point area include: selecting a static interference device and a dynamic interference device; fixing the interference frequency, signal strength and frequency band bandwidth of the static interference device during static interference, and gradually changing the interference frequency, signal strength and frequency band bandwidth of the dynamic interference device during dynamic interference; starting the interference device to interfere with the communication in the dedicated vehicle area of ​​the test point area.

[0019] The present invention provides a non-destructive testing system based on special vehicle area communication, comprising: a test point setting module, a parameter acquisition module, a communication rate calculation module, an interference test module, and an anti-interference ability calculation module; wherein the test point setting module is used to first set a plurality of test points in the special vehicle area, the distance between each test point and the vehicle increases exponentially, the test vehicle is used as a signal source, and the same receiver is installed on each test point to ensure that each test point has similar environmental conditions and reduce the influence of external factors on the test results; the parameter acquisition module is used to count the total number of code elements sent to the test point area communication at the signal source, directly measure the power of the signal and noise at the receiving end, count and record the number of error code elements, measure and record the signal strength parameter of the signal source for multiple times, the signal strength parameter, the channel effective bandwidth parameter, and the channel interference parameter at each test point, calculate the average value and standard deviation of the signal strength parameter, the channel effective bandwidth parameter, and the channel interference parameter, evaluate the stability and reliability of the data, and if the signal strength parameter, the channel effective bandwidth parameter, and the channel interference parameter are If the standard deviation is within the threshold, the average value is used as the acquired signal strength parameter, channel effective bandwidth parameter, and channel interference parameter; the communication rate calculation module is used to create a communication rate evaluation value calculation formula to evaluate the communication rate of the special vehicle area communication at different distances based on the acquired signal strength parameter, channel effective bandwidth parameter, and channel interference parameter; the interference test module is used to use interference sources to perform static interference and dynamic interference on the selected test point area communication: first, a static interference device and a dynamic interference device are selected, and the interference frequency, signal strength, and frequency band bandwidth of the static interference device are fixed during static interference, and the interference frequency, signal strength, and frequency band bandwidth of the dynamic interference device are gradually changed during dynamic interference, and the interference device is started to interfere with the special vehicle area communication in the test point area; the anti-interference ability calculation module is used to create an anti-interference ability evaluation value calculation formula to evaluate the resistance of the communication rate of the special vehicle area communication to interference based on the signal-to-noise ratio, bit error rate, communication rate when not interfered, and communication rate after different interferences of the test point.

[0020] The present invention provides an electronic device, comprising: a processor, and a memory for storing instructions executable by the processor; when the processor is configured to execute the instructions, the electronic device implements a non-destructive testing method based on dedicated vehicle area communication.

[0021] One or more technical solutions provided in the present invention have at least the following technical effects or advantages:

[0022] 1. By taking the test vehicle as the signal source and installing the same receiver at each test point, the communication rate of the special vehicle area communication signal at different distances is calculated using the communication rate evaluation value calculation formula according to the signal strength parameters, channel effective bandwidth parameters, and channel interference parameters at the test point, thereby realizing the communication test performance of the special vehicle area communication signal at different distances.

[0023] 2. By creating an anti-interference capability evaluation value calculation formula based on the signal-to-noise ratio, bit error rate, communication rate without interference, and communication rate after different interferences of the test point, the communication rate of the special vehicle area communication is evaluated to resist interference, thereby achieving a comprehensive reflection of the performance of the test point area communication.

[0024] 3. By using interference sources to conduct non-destructive tests directly in the dedicated vehicle area, a large amount of real data on the communication performance in the area is collected, thereby accurately reflecting the performance of the dedicated vehicle area communication in various scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A flow chart of a non-destructive testing method based on dedicated vehicle area communication provided in an embodiment of the present application;

[0026] Figure 2 A graph showing changes in the evaluation value of the non-destructive test anti-interference capability based on the dedicated vehicle regional communication provided in an embodiment of the present application;

[0027] Figure 3 A schematic diagram of the structure of a non-destructive testing system based on dedicated vehicle area communication provided in an embodiment of the present application. DETAILED DESCRIPTION

[0028] The embodiments of the present application provide a non-destructive testing method, system and electronic equipment based on special vehicle area communication, thereby solving the problem that in the existing non-destructive testing technology, the test of special vehicle area communication is often limited to a single-dimensional performance evaluation, such as only considering the signal strength or only considering the interference effect, resulting in the test vehicle area communication performance being not comprehensive and accurate. By setting up multiple test points at different distances and testing their communication performance and using interference sources in the test point area to statically and dynamically interfere with the test point area communication, various interference situations occurring in the real environment are simulated to evaluate the interference resistance of the special vehicle area communication, thereby realizing the evaluation of the communication performance of the vehicle area communication at different distances and the communication performance when subjected to different interferences at a fixed distance.

[0029] The technical solution in the embodiment of the present application is to solve the problem that in the above-mentioned existing non-destructive testing technology, the test for the dedicated vehicle area communication is often limited to a single-dimensional performance evaluation, such as only considering the signal strength or only considering the interference effect, resulting in the test The vehicle area communication performance is not comprehensive and accurate. The overall idea is as follows:

[0030] The nondestructive test based on the dedicated vehicle area communication is divided into the first dimension test and the second dimension test, wherein the first dimension test is the communication test performance of the dedicated vehicle area communication signal at different distances, and the second dimension test is the communication test performance of the dedicated vehicle area communication signal when it is subject to different interferences at a fixed distance; multiple test points are set in the dedicated vehicle area, and the distance between each test point and the vehicle is doubled to ensure that each test point has similar environmental conditions and reduce the impact of external factors on the test results; the test vehicle is used as a signal source, and the same receiver is installed at each test point; the steps of performing the first dimension test include: obtaining the signal strength parameters of the signal source, using The test points set in the dedicated vehicle area are used to measure and record the signal strength parameters of the signal source for multiple times, the signal strength parameters, channel effective bandwidth parameters, and channel interference parameters at each test point, and the average and standard deviation of the signal strength parameters, channel effective bandwidth parameters, and channel interference parameters at each test point are calculated to evaluate the stability and reliability of the data. If the standard deviation of the parameters is within the set threshold, the average value of the parameters is used as the first dimension parameter to be obtained; based on the first dimension parameters obtained, a communication rate evaluation value calculation formula is created to evaluate the communication rate of the communication signal in the dedicated vehicle area at different distances; the steps of the second dimension test include: first, in the dedicated vehicle area A test point is selected in the domain, and an interference source is fixed in the area; the interference source is used to perform static interference and dynamic interference on the communication in the test point area: the interference source parameters are set during static interference, including the interference frequency and signal strength; the interference frequency, signal strength and frequency band bandwidth are gradually changed during dynamic interference; the communication signal in the test point area after interference is measured multiple times, and the average values ​​of the frequency band bandwidth parameters, signal strength parameters and channel interference parameters of the test point are obtained as the second dimension parameters; according to the second dimension parameters, the communication rate evaluation value calculation formula is used to calculate the evaluation value of the communication rate of the test point under different interferences, and the number of signals sent to the test point area communication is counted at the signal source. The total number of code elements is measured multiple times at the receiving end for the communication signal of the test point area after interference, and the frequency band bandwidth parameters, signal strength parameters, and channel interference parameters of the test point are obtained. The average values ​​are calculated as the second dimension parameters, and then the communication rate evaluation value calculation formula is used to calculate the evaluation value of the communication rate of the test point under different interferences according to the second dimension parameters. The power of the signal and noise is directly measured at the receiving end, and the number of erroneous code elements is statistically recorded. According to the signal-to-noise ratio, bit error rate, communication rate without interference, and communication rate after different interferences of the test point, an anti-interference capability evaluation value calculation formula is created to evaluate the resistance of the communication rate of the special vehicle area communication to interference.

[0031] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0032] like Figure 1 As shown, it is a flow chart of a nondestructive testing method based on dedicated vehicle area communication provided in an embodiment of the present application. The method is applied to a nondestructive testing device based on dedicated vehicle area communication, and the method includes the following steps: dividing the nondestructive test based on dedicated vehicle area communication into a first dimension test and a second dimension test; setting a plurality of test points in the dedicated vehicle area, and the distance between each test point and the vehicle is increased exponentially; using the test vehicle as a signal source, and installing the same receiver at each test point; performing a first dimension test to obtain a first dimension test result; performing a second dimension test to obtain a second dimension test result; and evaluating the communication performance of the dedicated vehicle area communication according to the first dimension test result and the second dimension test result.

[0033] In this embodiment, the first dimension test mainly focuses on the change in transmission performance of the communication signal in the dedicated vehicle area as the distance increases. The communication rate of the test point communication is evaluated through the signal frequency band bandwidth, signal strength, and channel interference. The test vehicle is used as the signal source, and a receiver is installed at a test point close to the vehicle to simulate a short-range communication scenario. This not only directly evaluates the communication quality between the signal source and the receiver without considering complex environmental factors, but also because the distance is short, the test results can better reflect the basic performance of the dedicated vehicle area communication and provide benchmark data for subsequent tests; the second dimension test focuses on evaluating the change in transmission performance of the communication signal when it receives other interference in the dedicated vehicle area. By simulating interference in the actual environment, the instability problem of the dedicated vehicle area communication under specific conditions can be discovered and solved, and the performance of the dedicated vehicle area communication in a complex environment can be understood, which will help improve the adaptability and reliability of the dedicated vehicle area communication in various actual scenarios.

[0034] Furthermore, the non-destructive test based on dedicated vehicle area communication is divided into first dimension test and second dimension test, wherein: the first dimension test is the communication test performance of the dedicated vehicle area communication signal at different distances, and the second dimension test is the communication test performance of the dedicated vehicle area communication signal when subjected to different interferences at a fixed distance.

[0035] In this embodiment, the test is divided into two dimensions, taking both distance factors and interference factors into consideration, thereby achieving a comprehensive and integrated evaluation of the communication performance of the dedicated vehicle area, making the test results more representative and practical.

[0036] Furthermore, a first dimension test is performed, and the steps of obtaining the first dimension test results include: obtaining the signal strength parameters of the signal source, using the test points set in the dedicated vehicle area to measure and record the signal strength parameters of the signal source for multiple times, the signal strength parameters, channel effective bandwidth parameters, and channel interference parameters at each test point; calculating the average and standard deviation of the signal strength parameters, channel effective bandwidth parameters, and channel interference parameters recorded multiple times to evaluate the stability and reliability of the data. If the standard deviation is within the set threshold, the average value is used as the obtained first dimension parameter; based on the obtained first dimension parameters, a communication rate evaluation value calculation formula is created to evaluate the communication rate of the dedicated vehicle area communication signal at different distances to obtain the first dimension test results.

[0037] In this embodiment, multiple measurements are performed at each test point to reduce accidental errors and improve data accuracy. The set threshold is used to evaluate whether the standard deviation is within an acceptable range. If the standard deviation is small, it means that the data is stable and reliable, and the average value can be used as the first dimension parameter of the test point. If the standard deviation is large, it may be necessary to re-measure or check the measuring equipment.

[0038] Furthermore, the signal strength parameters of the signal source are obtained, and the signal strength parameters of the signal source are measured and recorded multiple times using the test points set in the dedicated vehicle area. The steps of the signal strength parameters, channel effective bandwidth parameters, and channel interference parameters at each test point include: measuring the amplitude of the signal in the signal source according to the spectrum analyzer as the signal strength parameter of the signal source, and measuring the amplitude of the signal in the test points set in the dedicated vehicle area as the signal strength parameter of the test point; obtaining the spectrum diagram at each test point through the spectrum analyzer, determining the effective bandwidth of the signal according to the signal amplitude and the noise threshold, and taking the frequency range in which the signal amplitude in the spectrum diagram is greater than the noise level as the channel effective bandwidth parameter; observing the degree of interference of adjacent channels on the target channel through the spectrum diagram to obtain the channel interference parameters suffered by the test point; measuring and recording the signal strength parameters of the signal source multiple times, the signal strength parameters, channel effective bandwidth parameters, and channel interference parameters at each test point.

[0039] In this embodiment, by measuring the signal strength at different locations, the signal coverage can be understood, thereby optimizing the network layout. If the signal strength is abnormal, it indicates signal interference, equipment failure or network configuration problems, which helps to promptly discover and solve the problem. The frequency band bandwidth determines the amount of data that the channel can transmit. Measuring the frequency band bandwidth can evaluate the capacity of the channel to ensure that the data transmission requirements are met. Measuring channel interference can not only help identify the source and characteristics of the interference signal, but also optimize channel selection and evaluate the performance of special vehicle area communications under different interference conditions. Measuring signal attenuation can evaluate the transmission capability of the signal under different conditions.

[0040] Furthermore, the communication rate evaluation value calculation formula is:

[0041] ;

[0042] In the formula, Indicates the communication rate evaluation value under this test point. Indicates the weight of the signal strength to the communication rate at this test point. It represents the weight of the channel to the communication rate at this test point. In this formula, The weight coefficient representing the impact of channel interference on channel bandwidth, Indicates the signal strength parameter of the signal source, Indicates the signal strength parameters at the test point. Indicates the effective bandwidth parameters of the channel under this test point. It represents the channel bandwidth parameter of the dedicated vehicle area communication. In this test method, the channel bandwidth parameter is the theoretical channel bandwidth of the entire dedicated vehicle area, and the channel effective bandwidth parameter is the effective bandwidth actually detected.

[0043] In this embodiment, the weights of signal strength to communication rate and channel to communication rate range from 0 to 1. By means of the relationship between the signal strength and the channel and the communication rate influencing index, a relative mapping set is constructed, the signal strength and channel bandwidth at the test point are input, and the weights of signal strength to communication rate and channel to communication rate corresponding to the test point are obtained from the mapping set. Signal strength represents the electric field strength of the communication signal. The ratio of the signal strength parameter at the test point to the signal strength parameter of the signal source can be used to evaluate the communication rate at the test point from the perspective of signal strength. The frequency band bandwidth refers to the frequency range that can be used for communication in the special vehicle area. A wider bandwidth usually means a higher communication rate. Channel interference refers to the interference of other signal sources or environmental factors to the channel during wireless communication, thereby affecting the effective value of the frequency range of the channel bandwidth. The product of the weight coefficient of the influence of channel interference on the channel bandwidth and the effective bandwidth parameter of the channel at the test point represents the effective bandwidth parameter in the test point area after the channel interference, and its ratio to the channel bandwidth parameter of the communication in the special vehicle area can be used to evaluate the communication rate of the test point area from the perspective of the channel. This communication rate evaluation value calculation formula is different from the traditional single factor evaluation method. It comprehensively considers multiple factors to calculate the communication rate, which can more accurately reflect the actual performance of special vehicle area communication.

[0044] Furthermore, a second dimension test is performed, and the steps of obtaining the second dimension test results include: first, selecting a test point in the dedicated vehicle area and fixing an interference source in the area; using the interference source to perform static interference and dynamic interference on the communication in the test point area respectively; counting the total number of code elements sent to the test point area communication at the signal source; measuring the communication signal of the test point area after interference for multiple times at the receiving end, obtaining the frequency band bandwidth parameter, signal strength parameter, and channel interference parameter of the test point, and calculating their average values ​​as the second dimension parameters; according to the second dimension parameters, using the communication rate evaluation value calculation formula to calculate the evaluation value of the communication rate of the test point under different interferences; directly measuring the power of the signal and noise at the receiving end, and statistically recording the number of erroneous code elements; according to the signal-to-noise ratio, bit error rate, communication rate when not interfered with, and communication rate after different interferences of the test point, creating an anti-interference ability evaluation value calculation formula to evaluate the resistance of the communication rate of the dedicated vehicle area communication to interference, and obtaining the second dimension test results.

[0045] In this embodiment, through the second dimension test, we can deeply understand the performance of the dedicated vehicle area communication when it is interfered, including the changes in key parameters such as frequency band bandwidth and signal strength. According to the evaluation of the anti-interference ability of the dedicated vehicle area communication, the reliability and stability of the dedicated vehicle area communication in a complex environment can be optimized. The test results can provide an important basis for the deployment of the dedicated vehicle area communication in practical applications, helping users understand the performance of the dedicated vehicle area communication under different interference conditions, so as to make more reasonable decisions. The test method not only takes into account static interference, but also introduces dynamic interference simulation, which more comprehensively reflects the complex interference situations that may be encountered in the actual environment. In addition, the test method is real-time and flexible, and the state of the interference source and the test parameters can be adjusted according to actual needs to adapt to the test needs in different scenarios.

[0046] Furthermore, the anti-interference capability evaluation value calculation formula is:

[0047] ;

[0048] In the formula, Indicates the evaluation value of the test point communication's resistance to interference, represents the weight of the signal-to-noise ratio, Indicates the weight of the communication rate, represents the weight of the bit error rate, It represents the signal-to-noise ratio, which can be directly measured by measuring equipment such as a power meter or spectrum analyzer, or indirectly evaluated by the signal quality after demodulation at the receiving end. S represents the power of the communication signal, N represents the noise power, Indicates the estimated value of the communication rate of the test point under normal circumstances, The evaluation value of the communication rate of the test point when interference exists is obtained by the evaluation value calculation formula of the communication rate. represents the bit error rate, where Indicates the number of error code elements received by the receiving end. It indicates the total number of code elements obtained by the signal source. The number of code elements of the signal source is usually related to the modulation method and coding rules, that is, the number of types of modulation symbols. These modulation symbols are formed by encoding and modulating the original data generated by the signal source. The number of code elements of the signal source can be inferred by consulting the relevant technical documents of the special vehicle area to understand the modulation method and coding rules adopted. It can also be obtained by analyzing the signal waveform output by the signal source through the signal analysis tool and observing the different forms and quantities of the waveform. The number of error code elements received by the receiving end can be generated by selecting the test sequence mode at the sending end and generating a known test sequence (before the test starts, the sending end and The receiving end will agree on key information such as the mode, length, and content of the test sequence in advance, so that both parties can clearly know what the sequences to be sent and received are. If the test sequence is very complex or difficult to agree on directly, the sending end can first send a description or parameters of a test sequence, and the receiving end will generate or identify the test sequence based on these descriptions or parameters), and then send the generated test sequence to the receiving end through the communication link. After receiving the signal, the receiving end reconstructs the signal to restore the sent test sequence, and compares the difference between the sequence decoded by the receiving end and the original sequence to calculate or use the existing error detection and correction mechanism to automatically detect and correct the error codewords.

[0049] In this embodiment, the weights of the signal-to-noise ratio, communication rate, bit error rate and the resistance of the test point communication to interference range from 0 to 1. Through the relationship between the signal-to-noise ratio, communication rate, bit error rate and the influencing index of the resistance of the test point communication to interference, a relative mapping set is constructed, and the signal-to-noise ratio, communication rate and bit error rate under the test point are input to obtain the weights of the signal-to-noise ratio and the resistance of the test point communication to interference, the weights of the communication rate and the resistance of the test point communication to interference, and the weights of the bit error rate and the resistance of the test point communication to interference corresponding to the test point from the mapping set. The signal-to-noise ratio, bit error rate and communication rate are closely related. If the signal-to-noise ratio is low, the noise interference signal may cause the receiving end to be unable to correctly decode the data, thereby increasing the bit error rate. If you want to maintain a low bit error rate without changing the resistance of the communication to interference, you can achieve this by reducing the communication rate of the communication system. Different from the evaluation method of a single indicator, the calculation formula for the anti-interference capability evaluation value combines three key factors: the proportion of error code elements, the signal-to-noise ratio, and the communication rate. It comprehensively reflects the performance of the communication in the test point area. When the ξ value is lower than a certain threshold, it may indicate that the communication in the dedicated vehicle area is about to fail or performance will deteriorate, so measures can be taken in advance.

[0050] Furthermore, the steps of using interference sources to perform static interference and dynamic interference on the communication in the test point area include: selecting a static interference device and a dynamic interference device; fixing the interference frequency, signal strength and frequency band bandwidth of the static interference device during static interference, and gradually changing the interference frequency, signal strength and frequency band bandwidth of the dynamic interference device during dynamic interference; starting the interference device to interfere with the communication in the dedicated vehicle area of ​​the test point area.

[0051] In this embodiment, static interference can simulate and evaluate the basic performance of special vehicle area communications in the absence of dynamically changing interference sources, which helps to understand key indicators such as communication quality, transmission rate and bit error rate of special vehicle area communications in a stable environment, while dynamic interference simulation can more accurately reflect the interference situation in the actual communication environment, which helps to evaluate the performance and stability of special vehicle area communications in actual usage scenarios; the combination of static interference and dynamic interference simulation can ensure that special vehicle area communications can maintain stable communication quality and performance under various interference conditions by continuously optimizing and adjusting parameters and strategies.

[0052] The anti-interference capability evaluation value calculation formula parameters are assigned, and each group of parameters represents a different communication environment or interference level. By calculating these parameter values, the resistance value of the test point communication to interference corresponding to each group of parameters can reflect the communication stability and anti-interference capability of the test point under specific conditions. As shown in Table 1, the anti-interference capability data table of the special vehicle area communication under different interferences is shown:

[0053] Table 1 Anti-interference capability data table based on special vehicle area communication when it is subject to different interferences

[0054]

[0055] like Figure 2 As shown, it is a non-destructive test anti-interference capability evaluation value change diagram based on dedicated vehicle area communication provided by the embodiment of the present application, which is composed of Figure 2 From Table 1, it can be concluded that the weight of the signal-to-noise ratio, the weight of the signal rate, the weight of the bit error rate, the ratio of the evaluation value of the communication rate of the test point under normal circumstances to the evaluation value of the communication rate of the test point during interference, and the bit error rate change, the signal-to-noise ratio and the evaluation value of the test point communication's resistance to interference change, so as to simulate the situation where the vehicle area communication is subject to various interferences in real scenarios. If the change graph of the non-destructive test anti-interference ability evaluation value based on the special vehicle area communication is relatively stable, and the evaluation value of the test point communication's resistance to interference is low, it means that the special vehicle area communication has strong anti-interference ability.

[0056] like Figure 3As shown, it is a structural schematic diagram of a non-destructive testing system based on dedicated vehicle area communication provided by an embodiment of the present application. The non-destructive testing system based on dedicated vehicle area communication provided by an embodiment of the present application includes: a test point setting module, a parameter acquisition module, a communication rate calculation module, an interference test module, and an anti-interference ability calculation module; wherein the test point setting module is used to first set a plurality of test points in the dedicated vehicle area, and the distance between each test point and the vehicle increases exponentially, and the test vehicle is used as a signal source, and the same receiver is installed at each test point to ensure that each test point has similar environmental conditions and reduce the influence of external factors on the test results; the parameter acquisition module is used to count the total number of code elements sent to the test point area communication at the signal source, directly measure the power of the signal and noise at the receiving end, count and record the number of error code elements, measure and record the signal strength parameters of the signal source for multiple times, the signal strength parameters, the channel effective bandwidth parameters, and the channel interference parameters at each test point, calculate the average value and standard deviation of the signal strength parameters, the channel effective bandwidth parameters, and the channel interference parameters, evaluate the stability and reliability of the data, and if the signal strength If the standard deviation of the parameters, channel effective bandwidth parameters, and channel interference parameters is within the threshold, the average value is used as the acquired signal strength parameter, channel effective bandwidth parameter, and channel interference parameter; the communication rate calculation module is used to create a communication rate evaluation value calculation formula to evaluate the communication rate of the special vehicle area communication at different distances based on the acquired signal strength parameter, channel effective bandwidth parameter, and channel interference parameter; the interference test module is used to use interference sources to perform static interference and dynamic interference on the selected test point area communication: first, a static interference device and a dynamic interference device are selected, and the interference frequency, signal strength, and frequency band bandwidth of the static interference device are fixed during static interference, and the interference frequency, signal strength, and frequency band bandwidth of the dynamic interference device are gradually changed during dynamic interference, and the interference device is started to interfere with the special vehicle area communication in the test point area; the anti-interference ability calculation module is used to create an anti-interference ability evaluation value calculation formula to evaluate the resistance of the communication rate of the special vehicle area communication to interference based on the signal-to-noise ratio, bit error rate, communication rate when not interfered, and communication rate after different interferences of the test point.

[0057] An embodiment of the present application also provides an electronic device, comprising: a processor and a memory for storing instructions executable by the processor; when the processor is configured to execute the instructions, the electronic device implements a non-destructive testing method based on dedicated vehicle area communication.

[0058] In summary, the embodiment of the present application sets up multiple test points in the dedicated vehicle area, obtains the signal strength parameters of the signal source, the signal strength parameters at each test point, the effective bandwidth parameters of the channel, and the channel interference parameters, and uses the communication rate evaluation value calculation formula to calculate the evaluation value of the communication rate of the test point, selects one test point and fixes the interference source, and evaluates the resistance of the test point communication to interference through the anti-interference capability evaluation value calculation formula based on the evaluation value of the communication rate of the test point under normal circumstances, the evaluation value of the communication rate of the test point after interference, the measured signal power, noise power, number of error code elements and total number of original codes, thereby solving the problem in the existing non-destructive testing technology that the laboratory test environment used cannot fully simulate and consider the complexity and dynamics of the actual road environment, there is a deviation between the test results and the actual situation, and it is difficult to accurately reflect the performance of the dedicated vehicle area communication in real scenarios.

[0059] It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as methods, vehicle area specific vehicle area communications, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product implemented on one or more computer usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer usable program code.

[0060] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (vehicle area dedicated vehicle area communication), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable communication processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable communication processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0061] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable communication processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture including an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0062] These computer program instructions may also be loaded onto a computer or other programmable communication processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for executing on the computer or other programmable device to implement the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0063] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0064] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A non-destructive testing method based on dedicated vehicle area communication, characterized in that: The following steps are involved: Divide the nondestructive test based on dedicated vehicle area communication into the first dimension test and the second dimension test; Multiple test points are set up in the dedicated vehicle area, with each test point being multiple times closer to the vehicle; The test vehicle is used as the signal source, and identical receivers are installed at each test point; Perform a first dimension test and obtain a first dimension test result; Perform a second dimension test to obtain a second dimension test result; Evaluate the communication performance of the dedicated vehicle area communication according to the first dimension test results and the second dimension test results; The steps of performing the first dimension test and obtaining the first dimension test result include: Obtain the signal strength parameters of the signal source, use the test points set in the dedicated vehicle area to measure and record the signal strength parameters of the signal source multiple times, the signal strength parameters at each test point, the channel effective bandwidth parameters, and the channel interference parameters; Calculate the average and standard deviation of the signal strength parameters, channel effective bandwidth parameters, and channel interference parameters recorded multiple times to evaluate the stability and reliability of the data. If the standard deviation is within the set threshold, use the average value as the first dimension parameter to obtain; According to the acquired first dimension parameters, a communication rate evaluation value calculation formula is created to evaluate the communication rate of the dedicated vehicle area communication signal at different distances to obtain the first dimension test result; The communication rate evaluation value calculation formula is: ； In the formula, Indicates the communication rate evaluation value under this test point. Indicates the weight of the signal strength to the communication rate at this test point. Indicates the weight of the channel to the communication rate at this test point, The weight coefficient representing the impact of channel interference on channel bandwidth, Indicates the signal strength parameter of the signal source, Indicates the signal strength parameters at the test point. Indicates the effective bandwidth parameters of the channel under this test point. represents the channel bandwidth parameter for dedicated vehicle area communication; The steps of performing the second dimension test and obtaining the second dimension test result include: First, a test point is selected in the dedicated vehicle area and the interference source is fixed in its area; Using interference sources to perform static interference and dynamic interference on the communication in the test point area respectively; Count the total number of code elements sent to the test point area for communication at the signal source; At the receiving end, the communication signal of the test point area after being interfered is measured multiple times to obtain the frequency band bandwidth parameter, signal strength parameter, and channel interference parameter of the test point, and the average value thereof is calculated as the second dimension parameter; According to the second dimension parameter, the communication rate evaluation value calculation formula is used to calculate the evaluation value of the communication rate of the test point under different interferences; Directly measure the power of the signal and noise at the receiving end, and record the number of error symbols; According to the signal-to-noise ratio, bit error rate, communication rate without interference and communication rate after different interferences of the test point, a calculation formula for the anti-interference capability evaluation value is created to evaluate the resistance of the communication rate of the special vehicle area communication to interference, and obtain the second dimension test result; The anti-interference capability evaluation value calculation formula is: ； In the formula, Indicates the evaluation value of the test point communication's resistance to interference, represents the weight of the signal-to-noise ratio, Indicates the weight of the communication rate, represents the weight of the bit error rate, represents the signal-to-noise ratio, where S represents the power of the communication signal and N represents the noise power. Indicates the estimated value of the communication rate of the test point under normal circumstances, Indicates the estimated value of the communication rate of the test point when interference exists. represents the bit error rate, where Indicates the number of error code elements received by the receiving end. Indicates the total number of code elements obtained by the signal source.

2. The non-destructive testing method based on dedicated vehicle regional communication as claimed in claim 1, characterized in that: The non-destructive test based on dedicated vehicle area communication is divided into first dimension test and second dimension test, wherein: the first dimension test is the communication test performance of the dedicated vehicle area communication signal at different distances, and the second dimension test is the communication test performance of the dedicated vehicle area communication signal when subjected to different interferences at a fixed distance.

3. The non-destructive testing method based on dedicated vehicle regional communication as claimed in claim 1, characterized in that: The steps of obtaining the signal strength parameters of the signal source, using the test points set in the dedicated vehicle area, repeatedly measuring and recording the signal strength parameters of the signal source, the signal strength parameters, the channel effective bandwidth parameters, and the channel interference parameters at each test point include: The amplitude of the signal measured by the spectrum analyzer in the signal source is used as the signal strength parameter of the signal source, and the amplitude of the signal measured in the test point set in the special vehicle area is used as the signal strength parameter of the test point; Obtain the spectrum diagram at each test point through a spectrum analyzer, and determine the effective channel bandwidth parameters of the signal based on the signal amplitude and noise threshold; Obtain the channel interference parameters of the test point by observing the interference degree of the adjacent channel to the target channel through the spectrum diagram; Measure and record the signal strength parameters of the signal source multiple times, the signal strength parameters at each test point, the channel effective bandwidth parameters, and the channel interference parameters.

4. The non-destructive testing method based on dedicated vehicle regional communication as claimed in claim 1, characterized in that: The steps of using interference sources to perform static interference and dynamic interference on the communication of the test point area include: Choose between static jammers and dynamic jammers; In static interference, the interference frequency, signal strength and frequency band bandwidth of the static interference device are fixed, and in dynamic interference, the interference frequency, signal strength and frequency band bandwidth of the dynamic interference device are gradually changed; The jamming device is started to interfere with the dedicated vehicle area communication in the test point area.

5. A system using the non-destructive testing method based on dedicated vehicle area communication as claimed in any one of claims 1 to 4, characterized in that: include: Test point setting module, parameter acquisition module, communication rate calculation module, interference test module, anti-interference ability calculation module; The test point setting module is used to first set up multiple test points in the dedicated vehicle area, with the distance between each test point and the vehicle increasing exponentially, using the test vehicle as a signal source, and installing the same receiver at each test point to ensure that each test point has similar environmental conditions and reduce the impact of external factors on the test results; The parameter acquisition module is used to count the total number of code elements sent to the test point area communication at the signal source, directly measure the power of the signal and noise at the receiving end, count and record the number of error code elements, measure and record the signal strength parameter of the signal source, the signal strength parameter, the channel effective bandwidth parameter, and the channel interference parameter at each test point for multiple times, calculate the average value and standard deviation of the signal strength parameter, the channel effective bandwidth parameter, and the channel interference parameter, evaluate the stability and reliability of the data, and if the standard deviation of the signal strength parameter, the channel effective bandwidth parameter, and the channel interference parameter is within the threshold, use the average value as the acquired signal strength parameter, the channel effective bandwidth parameter, and the channel interference parameter; The communication rate calculation module is used to create a communication rate evaluation value calculation formula to evaluate the communication rate of the dedicated vehicle area communication at different distances according to the acquired signal strength parameters, channel effective bandwidth parameters, and channel interference parameters; The interference test module is used to respectively use interference sources to perform static interference and dynamic interference on the selected test point area communication: firstly, a static interference device and a dynamic interference device are selected, and the interference frequency, signal strength and frequency band bandwidth of the static interference device are fixed during static interference, and the interference frequency, signal strength and frequency band bandwidth of the dynamic interference device are gradually changed during dynamic interference, and the interference device is started to interfere with the dedicated vehicle area communication of the test point area; The anti-interference capability calculation module is used to create an anti-interference capability evaluation value calculation formula to evaluate the resistance of the communication rate of the special vehicle area communication to interference based on the signal-to-noise ratio, bit error rate, communication rate when not interfered with, and communication rate after different interferences of the test point.

6. An electronic device, characterized in that: include: a processor, a memory for storing instructions executable by the processor; When the processor is configured to execute the instructions, the electronic device implements the non-destructive testing method based on dedicated vehicle area communication as described in any one of claims 1-4.

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