Multi-point antenna test platform of magnetic field receiving antenna

Abstract

The invention discloses a multi-point antenna test platform of a magnetic field receiving antenna, which relates to the technical field of antenna test and comprises the following steps: establishing a test environment and finishing initial test and calibration; detecting a test environment in real time, acquiring signal data, and performing broadband scanning; based on the test environment and the broadband scanning result, calculating the sensitivity deviation and the phase deviation of the antenna, and identifying the optimal working frequency; calculating a sensitivity adjustment coefficient and a phase adjustment coefficient based on the optimal working frequency, and compensating the sensitivity deviation and the phase deviation of the antenna; the emission source configuration is dynamically adjusted based on the optimal working frequency, an interference avoidance strategy is implemented, the antenna performance is comprehensively evaluated, and a detailed test report is generated; according to the invention, through broadband scanning and a comprehensive evaluation model, the working frequency of the antenna is comprehensively optimized, so that the test result is more universal and accurate. Finally, the test precision and the performance optimization capability of the magnetic field receiving antenna in a complex electromagnetic environment are remarkably improved.

Description

Technical Field

[0001] The present invention relates to the technical field of antenna testing, and in particular to a multi-point antenna testing platform for magnetic field receiving antennas. Background Art

[0002] With the rapid development of modern wireless communication technologies, magnetic field receiving antennas are increasingly widely used in fields such as low-frequency, ultra-low-frequency communication, radio measurement, and geomagnetic exploration. Due to their ability to capture low-frequency magnetic field signals, magnetic field receiving antennas have good anti-interference performance in complex electromagnetic environments and are of great significance for long-distance signal transmission and weak signal reception. However, in order to ensure the stable performance of magnetic field receiving antennas in different application scenarios, it is necessary to conduct comprehensive testing and performance optimization on them. Traditional antenna testing methods mainly use single-point antenna testing platforms, and the testing process usually relies on the measurement of signal responses within a fixed frequency range. These platforms evaluate the sensitivity and accuracy of the antenna by testing its amplitude response and phase response. However, with the continuous expansion of the communication frequency range, existing testing platforms are stretched in terms of sensitivity adjustment, phase compensation, and environmental interference avoidance for broadband signals. In addition, existing technologies usually ignore the dynamic effects of external factors such as temperature, humidity, and electromagnetic interference in the testing environment on the test results, resulting in insufficient accuracy of test data, which in turn limits the optimization space for the performance of magnetic field receiving antennas.

[0003] The existing magnetic field receiving antenna testing technologies also have the following deficiencies: First, most traditional testing platforms rely on signal response analysis within a fixed frequency range and lack the ability to dynamically scan broadband signals, making it difficult to comprehensively capture the amplitude and phase characteristics of the antenna at different frequencies, and thus unable to accurately identify the optimal operating frequency to optimize the antenna performance; Second, existing platforms lack a real-time monitoring and compensation mechanism for dynamic changes in the testing environment during the testing process. Especially in complex electromagnetic environments, the test results are easily affected by external interference, further reducing the accuracy of sensitivity and phase adjustment. These technical bottlenecks not only limit the accuracy and efficiency of antenna testing but also hinder the performance improvement of magnetic field receiving antennas in actual application scenarios. Summary of the Invention

[0004] In view of the above existing problems, the present invention is proposed.

[0005] Therefore, the present invention provides a multi-point antenna testing platform for magnetic field receiving antennas to solve the problems of the lack of broadband dynamic scanning ability and dynamic monitoring and compensation mechanism for the testing environment in the prior art.

[0006] To solve the above technical problems, the present invention provides the following technical solutions:

[0007] The present invention provides a multi-point antenna test platform for a magnetic field receiving antenna, which includes a test environment establishment module for establishing a test environment and completing initial tests and calibrations; a signal acquisition module for real-time detecting the test environment, collecting signal data, and performing broadband scanning; a frequency identification module for calculating the sensitivity deviation and phase deviation of the antenna and identifying the optimal operating frequency based on the test environment and the broadband scanning results; a deviation compensation module for calculating the sensitivity adjustment coefficient and phase adjustment coefficient based on the optimal operating frequency to compensate for the sensitivity deviation and phase deviation of the antenna; a dynamic emission source configuration module for dynamically adjusting the emission source configuration based on the optimal operating frequency and implementing an interference avoidance strategy; and a performance evaluation module for comprehensively evaluating the antenna performance and generating a detailed test report.

[0008] As a preferred embodiment of the multi-point antenna test platform for the magnetic field receiving antenna of the present invention, wherein: the steps of establishing the test environment are as follows

[0009] Install a control unit, sensors, a high-speed ADC module, an emission source device, and a central processing unit;

[0010] Establish the test environment by loading device drivers, setting initial parameters, communication protocol and data storage configurations, and test scripts and initial calibration programs.

[0011] As a preferred embodiment of the multi-point antenna test platform for the magnetic field receiving antenna of the present invention, wherein: the steps of completing the initial tests and calibrations are as follows

[0012] Complete the initial tests and calibrations through test environment detection, antenna initial calibration, joint debugging of the emission source and receiving device, and log recording.

[0013] As a preferred embodiment of the multi-point antenna test platform for the magnetic field receiving antenna of the present invention, wherein: the steps of real-time detecting the test environment are as follows

[0014] Dynamically monitor the temperature, humidity, and electromagnetic interference intensity through a sensor network, obtain environmental parameters in real time, and perform a comprehensive calculation of the environmental impact value to obtain the environmental impact factor C e , and the expression is:

[0015]

[0016] where C e is the environmental impact factor, T is the temperature, H is the humidity, E is the electromagnetic interference intensity, α is the temperature sensitivity coefficient, β is the temperature exponential weight, and γ is the interference smoothing factor;

[0017] The value range of the environmental impact factor is C e > 0. If C eWhen it is >1, it is determined that the environmental interference is large, compensation is required, the compensation parameters are calculated, and the signal is dynamically corrected. The expression is:

[0018]

[0019] Among them, K c is the compensation coefficient, and δ is the environmental sensitivity adjustment factor.

[0020] As a preferred solution of the multi-point antenna test platform for the magnetic field receiving antenna described in the present invention, wherein: the steps of collecting signal data are as follows.

[0021] Receive the antenna signal through a high-speed ADC, and perform dynamic amplitude correction on the collected signal according to the compensation coefficient. The expression is:

[0022] v ′ i =K c ·v i ;

[0023] Among them, v ′ i is the voltage value of the sampling point in the i-th antenna after correction, and v i is the voltage value of the sampling point in the i-th antenna.

[0024] As a preferred solution of the multi-point antenna test platform for the magnetic field receiving antenna described in the present invention, wherein: the steps of performing broadband scanning are as follows.

[0025] Send a broadband test signal through a vector signal generator, and calculate the signal amplitude response and phase response. The expression is:

[0026]

[0027] Among them, A i (f) is the amplitude response of the i-th antenna at frequency f, φ i (f) is the phase response of the i-th antenna at frequency f, f is the frequency of the transmitted signal, t is the time, Δt·N is the scanning time for each frequency, Δt is the single sampling time interval, N is the total number of sampling points, V i (t) is the corrected signal voltage; τ f is the time window for response calculation of the signal at frequency f.

[0028] As a preferred solution of the multi-point antenna test platform for the magnetic field receiving antenna described in the present invention, wherein: based on the test environment and the broadband scanning results, calculate the sensitivity deviation and phase deviation of the antenna, and identify the optimal operating frequency. The specific steps are as follows.

[0029] Combined with the test environment impact factors detected in real time and the signal amplitude response and phase response obtained from broadband scanning, calculate the sensitivity deviation and phase deviation. The expression is as follows:

[0030]

[0031] Among them, S i (f) is the sensitivity deviation of the i-th antenna at frequency f, and P i (f) is the phase deviation of the i-th antenna at frequency f, κ 1 is the sensitivity amplification factor, κ 2 is the sensitivity smoothing factor, κ 3 is the phase deviation amplification factor, κ 4 is the phase response modulation factor, φ ideal (f) is the ideal phase response, η 1 is the frequency modulation index of the sensitivity deviation, η 2 is the frequency modulation index of the phase deviation;

[0032] Based on the sensitivity deviation and phase deviation, construct a comprehensive evaluation model. The expression is as follows:

[0033]

[0034] Among them, Q i (f) is the comprehensive evaluation value of the i-th antenna at frequency f;

[0035] Based on the comprehensive evaluation value, identify the optimal operating frequency of the antenna.

[0036] As a preferred scheme of the multi-point antenna test platform for the magnetic field receiving antenna described in the present invention, wherein: based on the optimal operating frequency, calculate the sensitivity adjustment coefficient and the phase adjustment coefficient to compensate for the sensitivity deviation and phase deviation of the antenna. The specific steps are as follows:

[0037] Based on the optimal operating frequency, calculate the sensitivity adjustment coefficient and the phase adjustment coefficient. The expression is

[0038]

[0039] Among them, ρ s is the sensitivity adjustment coefficient, ξ p is the phase adjustment coefficient, m s is the sensitivity adjustment factor, m p is the phase adjustment factor, D i (f opt,i ) is the sensitivity deviation of the i-th antenna at the optimal operating frequency f opt,i under, Θ i (f opt,i) is the phase deviation of the i-th antenna at the optimal operating frequency f opt,i under;

[0040] Compensate for the sensitivity deviation and phase deviation of the antenna through the sensitivity adjustment coefficient and the phase adjustment coefficient.

[0041] As a preferred solution of the multi-point antenna test platform for the magnetic field receiving antenna described in the present invention, wherein: dynamically adjust the emission source configuration based on the optimal operating frequency, and implement an interference avoidance strategy. The specific steps are as follows.

[0042] Collect the environmental interference characteristics, extract the center frequency, power, bandwidth and time-varying characteristics of the interference, fit the power spectral density characteristics of the interference signal using the Gaussian distribution model, and construct an interference distribution model. The expression is:

[0043]

[0044] where I(f) is the interference power density at frequency f, and M j is the power peak of the j-th interference component, F j is the center frequency, W j is the bandwidth distribution parameter of the j-th interference component, and n is the total number of interference signals;

[0045] Combine the environmental parameters, calculate the comprehensive environmental impact factor, based on the optimal operating frequency and the interference distribution model, select the frequency band with lower interference intensity in the interference distribution, determine the transmission frequency closest to the optimal operating frequency of the antenna through an optimization algorithm, and dynamically adjust the transmission power in combination with the path loss and local interference intensity.

[0046] As a preferred solution of the multi-point antenna test platform for the magnetic field receiving antenna described in the present invention, wherein: comprehensively evaluate the antenna performance and generate a detailed test report. The specific steps are as follows.

[0047] Dynamically adjust the transmission frequency and power through the antenna received signal strength and interference level, comprehensively evaluate the antenna performance, evaluate the transmission performance of the antenna using the comprehensive performance index, and generate a detailed test report.

[0048] The beneficial effects of the present invention are as follows: By detecting the test environment in real time and implementing dynamic compensation, and calculating the sensitivity and phase deviation based on broadband scanning and identifying the optimal operating frequency, the present invention solves the problems of the traditional antenna test platform lacking dynamic environment adaptability and the limitation of the fixed frequency range. By monitoring the external environment changes in real time, the accuracy of signal acquisition is ensured; through broadband scanning and comprehensive evaluation model, the operating frequency of the antenna is comprehensively optimized, making the test results more universal and accurate. Finally, the present invention significantly improves the test accuracy and performance optimization ability of the magnetic field receiving antenna in a complex electromagnetic environment. Brief Description of the Drawings

[0049] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0050] Figure 1 It is a schematic diagram of the multi-point antenna test platform for the magnetic field receiving antenna in Embodiment 1.

[0051] Figure 2 It is a schematic diagram of signal acquisition in Embodiment 1. Detailed Embodiments

[0052] To make the above objects, features, and advantages of the present invention more obvious and understandable, the following will make a detailed description of the specific embodiments of the present invention in conjunction with the drawings in the specification.

[0053] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0054] Secondly, the so-called "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that can be included in at least one implementation manner of the present invention. The phrase "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that excludes other embodiments.

[0055] Embodiment 1, referring to Figure 1 and Figure 2 , is the first embodiment of the present invention. This embodiment provides a multi-point antenna test platform for a magnetic field receiving antenna, including the following steps:

[0056] A test environment establishment module that establishes a test environment and completes initial testing and calibration;

[0057] Furthermore, install a control unit, sensors, a high-speed ADC module, a transmitter device, and a central processing unit;

[0058] It should be noted that the control unit, as the core module of the entire test platform, is responsible for coordinating the work of each device, including sensor data acquisition, high-speed ADC data transmission, signal regulation of the transmitter, and execution of instructions from the central processing unit;

[0059] The sensor network is used to monitor key parameters in the test environment in real time, including temperature, humidity, and electromagnetic interference intensity;

[0060] The high-speed ADC module is responsible for converting the analog signal collected by the antenna into a digital signal and transmitting it to the central processing unit for processing in real time;

[0061] The transmitting source equipment (such as a vector signal generator) is responsible for generating a wideband test signal for testing the amplitude response and phase response of the antenna;

[0062] The central processing unit, as the brain of the test platform, is responsible for data processing, comprehensive analysis and test result output;

[0063] Establish the test environment by loading device drivers, setting initial parameters, communication protocols and data storage configuration, as well as test scripts and initial calibration procedures;

[0064] It should be noted that by loading the drivers of each device, the normal operation of the hardware is ensured; the initial working parameters of the control unit, sensor, high-speed ADC module and transmitting source device are set; the communication protocol between modules is configured to ensure the reliability of data transmission; the data storage format and path are planned to ensure the recording and traceability of test data; finally, the test script and initial calibration program are loaded to realize the automation of the test process and the calibration of antenna performance, thereby establishing an efficient and stable test environment.

[0065] Complete initial testing and calibration through testing environment detection, initial antenna calibration, joint debugging of transmitter and receiver, and log recording;

[0066] It should be noted that through the test environment detection, we first confirm whether the working status and environmental parameters of the sensor network, ADC module and transmitting source equipment meet the test conditions; then we perform the initial calibration of the antenna, and correct the amplitude gain and phase response of the antenna through the standard signal source; then we conduct the joint adjustment of the transmitting source and the receiving device, and synchronously configure the signal frequency, power and phase parameters to ensure the accuracy and consistency of signal transmission; finally, we record the test environment parameters, equipment configuration and calibration data in detail through log records to provide data support for subsequent analysis and optimization, thereby completing the initial test and calibration work and ensuring the reliability of the test environment and the accuracy of the test data.

[0067] Signal acquisition module, real-time detection of the test environment, acquisition of signal data, and wide-band scanning;

[0068] Furthermore, the temperature, humidity and electromagnetic interference intensity are dynamically monitored through the sensor network, the environmental parameters are obtained in real time, and the environmental impact value is comprehensively calculated to obtain the environmental impact factor C e , the expression is:

[0069]

[0070] Among them, C e is the environmental impact factor, T is the temperature, H is the humidity, E is the electromagnetic interference intensity, α is the temperature sensitivity coefficient, β is the temperature index weight, and γ is the interference smoothing factor;

[0071] The value range of the environmental impact factor is C e > 0. If C e > 1, it is considered that the environmental interference is large and compensation is required. Calculate the compensation parameter and dynamically correct the signal. The expression is:

[0072]

[0073] Among them, K c is the compensation coefficient, and δ is the environmental sensitivity adjustment factor;

[0074] It should be noted that the value range of the compensation coefficient K c is 0 < K c ≤ 1. If K c = 1, it is considered that no compensation is required. If K c < 1, it means that compensation is required.

[0075] Receive the antenna signal through the high-speed ADC, and dynamically correct the amplitude of the collected signal according to the compensation coefficient. The expression is:

[0076] v ′ i = K c ·v i ;

[0077] Among them, v ′ i is the voltage value of the sampling point in the i-th antenna after correction, and v i is the voltage value of the sampling point in the i-th antenna.

[0078] Send a broadband test signal through the vector signal generator, and calculate the signal amplitude response and phase response. The expression is:

[0079]

[0080] Among them, A i (f) is the amplitude response of the i-th antenna at frequency f, φ i (f) is the phase response of the i-th antenna at frequency f, f is the frequency of the transmitted signal, t is the time, Δt·N is the scanning time for each frequency, Δt is the single sampling time interval, N is the total number of sampling points, V i (t) is the corrected signal voltage, and τ fA time window for calculating the response of a signal at frequency f.

[0081] A frequency identification module that calculates the sensitivity deviation and phase deviation of the antenna and identifies the optimal operating frequency based on the test environment and broadband scan results;

[0082] Furthermore, combining the test environment impact factors detected in real time and the signal amplitude response and phase response obtained from the broadband scan, calculate the sensitivity deviation and phase deviation. The expressions are:

[0083]

[0084] Where S i (f) is the sensitivity deviation of the i-th antenna at frequency f, P i (f) is the phase deviation of the i-th antenna at frequency f, κ 1 is the sensitivity amplification factor, κ 2 is the sensitivity smoothing factor, κ 3 is the phase deviation amplification factor, κ 4 is the phase response modulation factor, φ ideal (f) is the ideal phase response, η 1 is the frequency modulation index of the sensitivity deviation, η 2 is the frequency modulation index of the phase deviation;

[0085] Based on the sensitivity deviation and phase deviation, construct a comprehensive evaluation model. The expressions are:

[0086]

[0087] Where Q i (f) is the comprehensive evaluation value of the i-th antenna at frequency f;

[0088] Based on the comprehensive evaluation value, identify the optimal operating frequency of the antenna. The expressions are:

[0089]

[0090] Where f opt,i is the optimal operating frequency of the antenna, f start is the starting value of the frequency, f stop is the ending value of the frequency.

[0091] A deviation compensation module that calculates the sensitivity adjustment coefficient and phase adjustment coefficient based on the optimal operating frequency and compensates for the sensitivity deviation and phase deviation of the antenna;

[0092] Furthermore, calculate the sensitivity adjustment coefficient and phase adjustment coefficient based on the optimal operating frequency. The expressions are

[0093]

[0094] Among them, ρ s is the sensitivity adjustment coefficient, ξ p is the phase adjustment coefficient, m s is the sensitivity adjustment factor, m p is the phase adjustment factor, D i (f opt,i ) is the sensitivity deviation of the i-th antenna at the optimal operating frequency f opt,i , Θ i (f opt,i ) is the phase deviation of the i-th antenna at the optimal operating frequency f opt,i ;

[0095] Compensate the sensitivity deviation and phase deviation of the antenna through the sensitivity adjustment coefficient and the phase adjustment coefficient.

[0096] It should be noted that the sensitivity deviation of the antenna will cause an error in the amplitude of the received signal by the antenna. It is necessary to correct the signal amplitude. Multiply the collected signal amplitude by the sensitivity adjustment coefficient to obtain the adjusted signal;

[0097] The phase deviation will cause the phase response of the signal to be inconsistent with the ideal value. It is necessary to adjust the phase response of the signal. Multiply the corrected signal by the phase adjustment coefficient to obtain the adjusted signal.

[0098] The dynamic emission source configuration module dynamically adjusts the emission source configuration based on the optimal operating frequency and implements an interference avoidance strategy;

[0099] Furthermore, collect the environmental interference characteristics, extract the central frequency, power, bandwidth and time-varying characteristics of the interference, use the Gaussian distribution model to fit the power spectral density characteristics of the interference signal, and construct an interference distribution model. The expression is:

[0100]

[0101] Among them, I(f) is the interference power density at frequency f, M j is the power peak value of the j-th interference component, F j is the central frequency, W j is the bandwidth distribution parameter of the j-th interference component, and n is the total number of interference signals;

[0102] Combined with the environmental parameters, calculate the comprehensive environmental impact factor C d , and the expression is:

[0103]

[0104] Among them, C d is the comprehensive environmental impact factor, αg is the temperature sensitivity coefficient of the comprehensive environmental impact factor, β g is the exponential weight of the comprehensive environmental impact factor, γ g is the interference smoothing factor of the comprehensive environmental impact factor, D t is the total interference power;

[0105] Based on the optimal operating frequency and the interference distribution model, select the frequency band with lower interference intensity in the interference distribution, determine the transmission frequency closest to the optimal operating frequency of the antenna through the optimization algorithm, and dynamically adjust the transmission power in combination with the path loss and the local interference intensity. The expression is:

[0106]

[0107] where, U tx is the adjusted transmission power, U max is the upper limit of the transmission power, x and y are the adjustment factors of the loss and the environmental impact, f tx is the transmission frequency closest to the optimal operating frequency of the antenna, and L is the path loss;

[0108] Combined with the antenna gain and the directivity adjustment, calculate the active efficiency of the signal. The expression is:

[0109]

[0110] where, U eff is the active power of the signal, G(θ,φ) is the antenna gain, γ u is the interference suppression factor, I(f tx ) is the interference intensity at the transmission frequency f tx ;

[0111] It should be noted that the antenna gain is the power amplification ability of the antenna, and the directivity adjustment means adjusting the direction of the antenna so that the received or transmitted signal is concentrated in a specific direction to improve the signal transmission efficiency.

[0112] The performance evaluation module comprehensively evaluates the antenna performance and generates a detailed test report.

[0113] Furthermore, dynamically adjust the transmission frequency and power through the received signal strength and the interference level of the antenna, comprehensively evaluate the antenna performance, and calculate the comprehensive performance index of the transmission. The expression is:

[0114]

[0115] where, Q t is the comprehensive performance index of the transmission;

[0116] Evaluate the transmission performance of the antenna using the comprehensive performance index and generate a detailed test report;

[0117] It should be noted that the test report includes the description of the test environment, antenna performance indicators, performance scoring and grading, optimization of the transmitter configuration, and test conclusions and suggestions.

[0118] In summary, the present invention solves the problems of the lack of dynamic environment adaptability and the limitation of the fixed frequency range of the traditional antenna test platform by: real-time detecting the test environment and implementing dynamic compensation, and calculating the sensitivity and phase deviation based on broadband scanning to identify the optimal operating frequency. By real-time monitoring the changes in the external environment, the accuracy of signal acquisition is ensured; through broadband scanning and the comprehensive evaluation model, the operating frequency of the antenna is comprehensively optimized, making the test results more universal and accurate. Finally, the present invention significantly improves the test accuracy and performance optimization ability of the magnetic field receiving antenna in a complex electromagnetic environment.

[0119] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered by the scope of the claims of the present invention.

Claims

1. A multi-point antenna test platform for a magnetic field receiving antenna, characterized in that: include, Test environment establishment module, establishes the test environment and completes initial testing and calibration; Signal acquisition module, real-time detection of the test environment, acquisition of signal data, and wide-band scanning; The frequency identification module calculates the sensitivity deviation and phase deviation of the antenna based on the test environment and wideband scanning results, and identifies the optimal operating frequency; The deviation compensation module calculates the sensitivity adjustment coefficient and the phase adjustment coefficient based on the optimal operating frequency, and compensates for the sensitivity deviation and phase deviation of the antenna; Dynamic transmitter configuration module, dynamically adjusts transmitter configuration based on optimal operating frequency and implements interference avoidance strategy; The performance evaluation module comprehensively evaluates antenna performance and generates a detailed test report.

2. The multi-point antenna test platform for a magnetic field receiving antenna according to claim 1, characterized in that: The specific steps for establishing a test environment are as follows: Install the control unit, sensor, high-speed ADC module, source equipment and central processing unit; The test environment is established by loading device drivers, setting initial parameters, communication protocols and data storage configuration, as well as test scripts and initial calibration procedures.

3. The multi-point antenna test platform for a magnetic field receiving antenna as claimed in claim 2, characterized in that: The initial test and calibration are completed as follows: The initial test and calibration are completed through test environment detection, initial antenna calibration, joint adjustment of the transmitting source and receiving equipment, and log recording.

4. The multi-point antenna test platform for a magnetic field receiving antenna as claimed in claim 3, characterized in that: The real-time detection test environment has the following specific steps: The temperature, humidity and electromagnetic interference intensity are dynamically monitored through the sensor network, the environmental parameters are obtained in real time, and the environmental impact value is comprehensively calculated to obtain the environmental impact factor C e , the expression is: Among them, C e is the environmental influencing factor, T is the temperature, H is the humidity, E is the electromagnetic interference intensity, α is the temperature sensitivity coefficient, β is the temperature index weight, and γ is the interference smoothing factor; The value range of the environmental impact factor is C e >0, if C e When >1, it is considered that the environmental interference is large and compensation is required. The compensation parameters are calculated and the signal is dynamically corrected. The expression is: Among them, K c is the compensation coefficient, and δ is the environmental sensitivity adjustment factor.

5. The multi-point antenna test platform for a magnetic field receiving antenna as claimed in claim 4, characterized in that: The specific steps of collecting signal data are as follows: The antenna signal is received by the high-speed ADC, and the acquired signal is dynamically corrected according to the compensation coefficient. The expression is: v ′ i =K c ·v i ; Among them, v ′ i is the voltage value of the sampling point in the ith antenna after correction, v i is the voltage value of the sampling point in the i-th antenna.

6. The multi-point antenna test platform for a magnetic field receiving antenna as claimed in claim 5, characterized in that: The specific steps of performing broadband scanning are as follows: A wideband test signal is sent through a vector signal generator, and the signal amplitude response and phase response are calculated. The expression is: Among them, A i (f) is the amplitude response of the ith antenna at frequency f, φ i (f) is the phase response of the ith antenna at frequency f, f is the frequency of the transmitted signal, t is the time, Δt·N is the scanning time for each frequency, Δt is the single sampling time interval, N is the total number of sampling points, V i (t) is the corrected signal voltage; τ f The time window for calculating the response of the signal at frequency f.

7. The multi-point antenna test platform for a magnetic field receiving antenna according to claim 6, characterized in that: Based on the test environment and the broadband scanning results, the sensitivity deviation and phase deviation of the antenna are calculated to identify the optimal operating frequency. The specific steps are as follows: Combining the real-time detected test environment influencing factors and the signal amplitude response and phase response obtained by wide-band scanning, the sensitivity deviation and phase deviation are calculated, and the expression is: Among them, S i (f) is the sensitivity deviation of the ith antenna at frequency f, P i (f) is the phase deviation of the ith antenna at frequency f, κ1 is the sensitivity amplification factor, κ2 is the sensitivity smoothing factor, κ3 is the phase deviation amplification factor, κ4 is the phase response modulation factor, φ ideal (f) is the ideal phase response, η1 is the frequency modulation index of sensitivity deviation, and η2 is the frequency modulation index of phase deviation; Based on the sensitivity deviation and phase deviation, a comprehensive evaluation model is constructed, and the expression is: Among them, Q i (f) is the comprehensive evaluation value of the ith antenna at frequency f; Based on the comprehensive evaluation value, the optimal operating frequency of the antenna is identified.

8. The multi-point antenna test platform for a magnetic field receiving antenna according to claim 7, characterized in that: The sensitivity adjustment coefficient and the phase adjustment coefficient are calculated based on the optimal operating frequency to compensate for the sensitivity deviation and the phase deviation of the antenna. The specific steps are as follows: Based on the optimal operating frequency, the sensitivity adjustment coefficient and phase adjustment coefficient are calculated, and the expressions are: Among them, ρ s is the sensitivity adjustment coefficient, ξ p is the phase adjustment coefficient, m s is the sensitivity adjustment factor, m p is the phase adjustment factor, D i (f opt,i ) is the optimal operating frequency f of the ith antenna opt,i The sensitivity deviation under i (f opt,i ) is the optimal operating frequency f of the ith antenna opt,i Phase deviation under The sensitivity deviation and phase deviation of the antenna are compensated by the sensitivity adjustment coefficient and the phase adjustment coefficient.

9. The multi-point antenna test platform for a magnetic field receiving antenna according to claim 8, characterized in that: The specific steps of dynamically adjusting the transmission source configuration based on the optimal operating frequency and implementing the interference avoidance strategy are as follows: Collect environmental interference characteristics, extract the center frequency, power, bandwidth and time variation characteristics of the interference, use the Gaussian distribution model to fit the power spectrum density characteristics of the interference signal, and construct an interference distribution model. The expression is: Where I(f) is the interference power density at frequency f, M j is the peak power of the jth interference component, F j is the center frequency, W j is the bandwidth distribution parameter of the jth interference component, and n is the total number of interference signals; Combined with environmental parameters, the comprehensive environmental impact factor is calculated. Based on the optimal operating frequency and interference distribution model, the frequency band with lower interference intensity is selected in the interference distribution. The transmission frequency closest to the optimal operating frequency of the antenna is determined through an optimization algorithm, and the transmission power is dynamically adjusted in combination with the path loss and local interference intensity.

10. The multi-point antenna test platform for a magnetic field receiving antenna according to claim 9, characterized in that: The comprehensive evaluation of antenna performance and generation of a detailed test report are as follows: By measuring the signal strength and interference level received by the antenna, dynamically adjusting the transmission frequency and power, comprehensively evaluating the antenna performance, using comprehensive performance indicators to evaluate the antenna's transmission performance, and generating a detailed test report.

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