Failure array element detection method and device based on time reversal, equipment and medium

Abstract

The invention relates to a failure array element detection method and device based on time reversal, equipment and a medium. The method is applied to a failure array element detection device based on time reversal, and the device comprises an array antenna and a reference antenna which are located in a closed metal cavity, and a vector network analyzer and an upper computer which are located outside the closed metal cavity. The method comprises the following steps: establishing a simulation model of a failure array element detection device based on time reversal by using an upper computer; a transmission coefficient between the array antenna and the reference antenna is measured and obtained through a vector network analyzer, and the transmission coefficient is converted into a time inversion signal by adopting a frequency-time conversion algorithm based on time inversion; and injecting a time reversal signal into the simulation model to diagnose the working state distribution condition of the array element, and positioning a failure array element in the array antenna. By adopting the method, efficient and convenient failure array element detection can be realized.

Description

Technical Field

[0001] The present application relates to the field of electromagnetic compatibility testing technology, and in particular to a method, device, equipment and medium for detecting failed array elements based on time reversal. Background Art

[0002] The performance of an array antenna depends on the characteristics of each element. Failure or damage to an element can affect the array's radiation performance, leading to reduced gain, increased sidelobes, or misaligned pointing. Therefore, addressing performance degradation requires identifying these failed elements. Large array antennas typically have hundreds or thousands of elements. The current common approach involves direct testing of each element, which is labor-intensive, demanding, and often time-consuming. Summary of the Invention

[0003] Based on this, it is necessary to provide a method, device, equipment and medium for detecting failed array elements based on time reversal to address the above technical problems, which can achieve efficient and convenient detection of failed array elements.

[0004] A method for detecting a failed array element based on time reversal is applied to a device for detecting a failed array element based on time reversal. The device comprises an array antenna and a reference antenna located inside a closed metal cavity, and a vector network analyzer and a host computer located outside the closed metal cavity. The method comprises:

[0005] Use the host computer to build a simulation model of the failed array element detection device based on time reversal;

[0006] The transmission coefficient between the array antenna and the reference antenna is measured using a vector network analyzer, and the transmission coefficient is converted into a time-reversed signal using a frequency-time conversion algorithm based on time reversal.

[0007] The time reversal signal is injected into the simulation model to diagnose the distribution of array element working status and locate the failed array elements in the array antenna.

[0008] In one embodiment, measuring and obtaining a transmission coefficient between an array antenna and a reference antenna using a vector network analyzer includes:

[0009] The two ends of the vector network analyzer are respectively connected to the array antenna and the reference antenna located inside the closed metal cavity;

[0010] On the one hand, the vector network analyzer outputs a pulse signal to the array antenna. After the pulse signal excites the array antenna to transmit an electromagnetic field signal, the reference antenna receives the electromagnetic field signal in the closed metal cavity. On the other hand, the vector network analyzer measures and obtains the transmission coefficient between the array antenna and the reference antenna by comparing and analyzing the output signal of the reference antenna with the input signal of the array antenna.

[0011] In one embodiment, a frequency-time conversion algorithm based on time reversal is used to convert the transmission coefficient into a time reversal signal, including:

[0012] The calculation formula of the frequency-time conversion algorithm based on time reversal is:

[0013]

[0014] Among them, y TR [n] represents the transformed time-reversed signal, S 21 [k] is the transmission coefficient in the discrete domain measured by a vector network analyzer, |S 21 [k]| is the magnitude of the transmission coefficient, ∠S 21 [k] is the phase of the transmission coefficient, N is the total time of the transmission coefficient measurement process, k is the discrete frequency, n is the discrete time, k L is the lower limit frequency, k H is the upper frequency limit.

[0015] In one embodiment, injecting a time reversal signal into a simulation model to diagnose the distribution of array element working states and locate failed array elements in an array antenna includes:

[0016] The simulation model is a reconstruction of a time-reversal-based failed element detection device, consisting of an array antenna inside a closed metal cavity, a reference antenna, and two ports on the closed metal cavity that connect the array antenna and the reference antenna, respectively.

[0017] The time-reversed signal is injected into the simulation model through the port connected to the reference antenna, and an electromagnetic field signal is simulated and propagated in the simulation model. The energy focusing amplitude formed by the electromagnetic field signal at the location of each array element of the array antenna is detected and analyzed to diagnose the distribution of the array element working status, and the array element with the smallest amplitude value is determined to be a failed array element. The propagation time of the electromagnetic field signal is consistent with the total time N of the transmission coefficient measurement process.

[0018] A time-reversal-based failed array element detection device comprises an array antenna and a reference antenna located inside a closed metal cavity, and a vector network analyzer and a host computer located outside the closed metal cavity;

[0019] The closed metal cavity has two ports connected to the outside world. The inside of one port is connected to the array antenna, and the inside of the other port is connected to the reference antenna, forming a two-port network with the array antenna inside the closed metal cavity. The outsides of the two ports are respectively connected to the two ends of a vector network analyzer, which is used to measure and obtain the transmission coefficient between the array antenna and the reference antenna. The transmission coefficient is converted into a time-reversed signal using a frequency-time conversion algorithm based on time inversion.

[0020] The host computer is used to build a simulation model of a failed array element detection device based on time reversal, and to diagnose the distribution of array element working status by injecting the time reversal signal output by the vector network analyzer into the simulation model, thereby locating the failed array element in the array antenna.

[0021] Furthermore, the apparatus also includes cables connecting the various devices and a power supply to support normal operation of the various devices.

[0022] A computer device includes a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the following steps are implemented:

[0023] Use the host computer to build a simulation model of the failed array element detection device based on time reversal;

[0024] The transmission coefficient between the array antenna and the reference antenna is measured using a vector network analyzer, and the transmission coefficient is converted into a time-reversed signal using a frequency-time conversion algorithm based on time reversal.

[0025] The time reversal signal is injected into the simulation model to diagnose the distribution of array element working status and locate the failed array elements in the array antenna.

[0026] A computer-readable storage medium stores a computer program, which, when executed by a processor, implements the following steps:

[0027] Use the host computer to build a simulation model of the failed array element detection device based on time reversal;

[0028] The transmission coefficient between the array antenna and the reference antenna is measured using a vector network analyzer, and the transmission coefficient is converted into a time-reversed signal using a frequency-time conversion algorithm based on time reversal.

[0029] The time reversal signal is injected into the simulation model to diagnose the distribution of array element working status and locate the failed array elements in the array antenna.

[0030] The above-mentioned time reversal-based failed array element detection method, device, equipment and medium have the following beneficial effects:

[0031] 1. This application provides an indirect detection method for failed array elements. It does not require individual detection of each array element. Instead, it uses the transmission coefficient measurement results between the array antenna and the reference antenna, combined with a frequency-time conversion algorithm based on time reversal to obtain a time reversal signal. The time reversal signal is then injected into a simulation model of the detection device to simulate and locate the failed array element. The frequency-time conversion algorithm based on time reversal is direct and simple to calculate and can be easily implemented through programming. Constructing a simulation model of the detection device can realize the detection of failed array elements in three-dimensional space, rather than being limited to one dimension. This application is suitable for efficient diagnosis of failed array elements in large array antennas, with simple testing requirements and low test resource requirements.

[0032] 2. The failed array element detection device provided in this application places the array antenna to be detected and the reference antenna in a closed metal cavity, which can shield various external interference signals. The measurement results of the transmission coefficient are highly accurate, thereby improving the positioning detection accuracy of the failed array element. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 1 is a flow chart of a method for detecting a failed array element based on time reversal in one embodiment;

[0034] Figure 2 FIG. 1 is a schematic diagram comparing the actual array element distribution and the reconstructed array element distribution generated by the simulation model in one embodiment; wherein, Figure 2 (a) is a schematic diagram of the actual distribution of array elements. Figure 2 (b) Schematic diagram of the reconstructed array element distribution generated by the simulation model;

[0035] Figure 3 1 is a schematic structural diagram of a failed array element detection device based on time reversal in one embodiment;

[0036] Figure 4 FIG1 is a flow chart of a failed array element detection test using a failed array element detection device based on time reversal in one embodiment;

[0037] Figure 5 FIG. 1 is a diagram showing the internal structure of a computer device in one embodiment. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solutions and advantages of this application more clear, the following further describes this application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0039] In one embodiment, Figure 1As shown, a method for detecting a failed array element based on time reversal is provided. The method is applied to a device for detecting a failed array element based on time reversal. The device includes an array antenna and a reference antenna located inside a closed metal cavity, and a vector network analyzer (VNA) and a host computer located outside the closed metal cavity. The method includes the following steps:

[0040] Firstly, a simulation model of the failed array element detection device based on time reversal is constructed using the host computer.

[0041] Secondly, the transmission coefficient between the array antenna and the reference antenna is measured by a vector network analyzer, and the transmission coefficient is converted into a time-reversal signal using a frequency-time conversion algorithm based on time reversal.

[0042] Finally, the time reversal signal is injected into the simulation model to diagnose the distribution of array element working status and locate the failed array elements in the array antenna.

[0043] This method uses the transmission coefficient measurement results between the array antenna and the reference antenna, combined with a frequency-time conversion algorithm based on time reversal to obtain a time reversal signal. The time reversal signal is then injected into the simulation model of the detection device to simulate the positioning of the failed array element. This can achieve indirect detection of the failed array element without the need to detect each array element one by one. This method is suitable for efficient diagnosis of failed array elements in large array antennas, with simple testing requirements and low test resource demands.

[0044] In one embodiment, measuring and obtaining a transmission coefficient between an array antenna and a reference antenna using a vector network analyzer includes:

[0045] The two ends of the vector network analyzer are respectively connected to the array antenna and the reference antenna located inside the closed metal cavity;

[0046] The vector network analyzer outputs a pulse signal to the array antenna, which then stimulates the array antenna to emit an electromagnetic field signal. The reference antenna then receives the electromagnetic field signal within the closed metal cavity. The vector network analyzer also compares the reference antenna's output signal with the array antenna's input signal to measure the transmission coefficient between the array antenna and the reference antenna. Specifically, sufficient time must be reserved during the test to ensure that the reference antenna can fully receive the electromagnetic field signal within the closed metal cavity.

[0047] It can be understood that placing the array antenna and the reference antenna inside a closed metal cavity can shield various external interference signals, making the transmission coefficient measured by the external vector network analyzer more accurate, thereby improving the positioning detection accuracy of the failed array element.

[0048] In one embodiment, a frequency-time conversion algorithm based on time reversal is used to convert the transmission coefficient into a time reversal signal, including:

[0049] The calculation formula of the frequency-time conversion algorithm based on time reversal is:

[0050]

[0051] Among them, y TR [n] represents the transformed time-reversed signal, S 21 [k] is the transmission coefficient in the discrete domain measured by a vector network analyzer, |S 21 [k]| is the magnitude of the transmission coefficient, ∠S 21 [k] is the phase of the transmission coefficient, N is the total time of the transmission coefficient measurement process, k is the discrete frequency, n is the discrete time, k L is the lower limit frequency, k H is the upper frequency limit.

[0052] In one embodiment, injecting a time reversal signal into a simulation model to diagnose the distribution of array element working states and locate failed array elements in an array antenna includes:

[0053] The simulation model is a reconstruction of a time-reversal-based failed element detection device, consisting of an array antenna inside a closed metal cavity, a reference antenna, and two ports on the closed metal cavity that connect the array antenna and the reference antenna, respectively.

[0054] The time-reversed signal is injected into the simulation model through the port connected to the reference antenna, and an electromagnetic field signal is simulated and propagated in the simulation model. The energy focusing amplitude formed by the electromagnetic field signal at the location of each array element of the array antenna is detected and analyzed to diagnose the distribution of the array element working status, and the array element with the smallest amplitude value is determined to be a failed array element. The propagation time of the electromagnetic field signal is consistent with the total time N of the transmission coefficient measurement process.

[0055] It can be understood that normally working array elements have a large energy focusing amplitude due to their ability to radiate electromagnetic field signals, while failed array elements usually have an extremely small amplitude due to their inability to radiate electromagnetic field signals. Therefore, the position of the failed array element can be located by locating the coordinates where the extremely small amplitude value appears in the simulation model.

[0056] Specifically, if Figure 2 As shown, for an array antenna containing 25 elements, the reconstructed element distribution generated by the simulation model is basically consistent with the actual distribution of the elements, including 23 normally working elements and 2 failed elements, indicating that the time reversal-based failed element detection method provided in this application can achieve accurate diagnosis of failed elements in large array antennas.

[0057] In one embodiment, Figure 3 As shown, a time reversal-based failed array element detection device is provided, which includes an array antenna and a reference antenna located inside a closed metal cavity, and a vector network analyzer and a host computer located outside the closed metal cavity.

[0058] Among them, the closed metal cavity has two ports connected to the outside world, the inner side of one port is connected to the array antenna, and the inner side of the other port is connected to the reference antenna, which is used to form a two-port network with the array antenna inside the closed metal cavity; the outer sides of the two ports are respectively connected to the two ends of the vector network analyzer, which is used to measure and obtain the transmission coefficient between the array antenna and the reference antenna, and use the frequency-time conversion algorithm based on time inversion to convert the transmission coefficient into a time reversal signal.

[0059] The host computer is used to build a simulation model of a failed array element detection device based on time reversal, and to diagnose the distribution of array element working status by injecting the time reversal signal output by the vector network analyzer into the simulation model, thereby locating the failed array element in the array antenna.

[0060] Furthermore, the device also includes cables connecting the various devices and a power supply to support the normal operation of the various devices.

[0061] like Figure 4 As shown, the process of performing a failed array element detection test using a failed array element detection device based on time reversal includes the following steps:

[0062] (1) Install and arrange the instruments and equipment for detecting failed array elements. Specifically, install the array antenna and reference antenna inside the closed metal cavity, and the vector network analyzer and host computer outside the closed metal cavity, and Figure 3 The connections shown connect the devices.

[0063] (2) Conduct the test in accordance with the test requirements.

[0064] (3) Recording measurement data. Specifically, recording the transmission coefficient between the array antenna and the reference antenna obtained by the vector network analyzer.

[0065] (4) Calculate the test results based on the measured data and draw experimental conclusions. Specifically, the transmission coefficient is converted into a time-reversal signal using a frequency-time conversion algorithm based on time reversal, and the time-reversal signal is injected into the detection device simulation model constructed by the host computer to diagnose the distribution of the array element working status and locate the failed array element in the array antenna.

[0066] In one embodiment, a computer device is provided. The computer device may be a terminal, and its internal structure diagram may be as follows: Figure 5As shown. The computer device includes a processor, memory, network interface, display screen and input device connected via a system bus. The processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and computer program in the non-volatile storage medium. The network interface of the computer device is used to communicate with an external terminal via a network connection. When the computer program is executed by the processor, a method for detecting a failed array element based on time reversal is implemented. The display screen of the computer device can be a liquid crystal display screen or an electronic ink display screen. The input device of the computer device can be a touch layer covering the display screen, or a key, trackball or touchpad provided on the computer device housing, or an external keyboard, touchpad or mouse.

[0067] Those skilled in the art will understand that Figure 5 The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than shown in the figure, or combine certain components, or have a different component arrangement.

[0068] In one embodiment, a computer device is provided, including a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the following steps are implemented:

[0069] Use the host computer to build a simulation model of the failed array element detection device based on time reversal;

[0070] The transmission coefficient between the array antenna and the reference antenna is measured using a vector network analyzer, and the transmission coefficient is converted into a time-reversed signal using a frequency-time conversion algorithm based on time reversal.

[0071] The time reversal signal is injected into the simulation model to diagnose the distribution of array element working status and locate the failed array elements in the array antenna.

[0072] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the following steps are implemented:

[0073] Use the host computer to build a simulation model of the failed array element detection device based on time reversal;

[0074] The transmission coefficient between the array antenna and the reference antenna is measured using a vector network analyzer, and the transmission coefficient is converted into a time-reversed signal using a frequency-time conversion algorithm based on time reversal.

[0075] The time reversal signal is injected into the simulation model to diagnose the distribution of array element working status and locate the failed array elements in the array antenna.

[0076] Those skilled in the art will appreciate that all or part of the processes in the above-mentioned embodiments can be implemented by instructing the relevant hardware through a computer program. The computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, storage, database or other media used in the embodiments provided in this application can include non-volatile and / or volatile memory. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) or flash memory. Volatile memory can include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in various forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).

[0077] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0078] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present application shall be determined by the appended claims.

Claims

1. A method for detecting failed array elements based on time reversal, characterized in that: The method is applied to a time-reversal-based failed element detection device, the device comprising an array antenna and a reference antenna located inside a closed metal cavity, and a vector network analyzer and a host computer located outside the closed metal cavity; the method comprises: Using a host computer to construct a simulation model of the failed array element detection device based on time reversal; The transmission coefficient between the array antenna and the reference antenna is measured by a vector network analyzer, and the transmission coefficient is converted into a time-reversed signal by using a frequency-time conversion algorithm based on time reversal; The time reversal signal is injected into the simulation model to diagnose the distribution of array element working states and locate the failed array elements in the array antenna.

2. The method according to claim 1, characterized in that The transmission coefficient between the array antenna and the reference antenna is measured using a vector network analyzer, including: The two ends of the vector network analyzer are respectively connected to the array antenna and the reference antenna located inside the closed metal cavity; On the one hand, the vector network analyzer outputs a pulse signal to the array antenna. After the pulse signal excites the array antenna to transmit an electromagnetic field signal, the reference antenna receives the electromagnetic field signal in the closed metal cavity. On the other hand, the vector network analyzer measures and obtains the transmission coefficient between the array antenna and the reference antenna by comparing and analyzing the output signal of the reference antenna with the input signal of the array antenna.

3. The method according to claim 2, characterized in that The transmission coefficient is converted into a time-reversal signal using a frequency-time conversion algorithm based on time reversal, including: The calculation formula of the frequency-time conversion algorithm based on time inversion is: Among them, y TR [n] represents the transformed time-reversed signal, S 21 [k] is the transmission coefficient in the discrete domain measured by a vector network analyzer, |S 21 [k]| is the magnitude of the transmission coefficient, ∠S 21 [k] is the phase of the transmission coefficient, N is the total time of the transmission coefficient measurement process, k is the discrete frequency, n is the discrete time, k L is the lower limit frequency, k H is the upper frequency limit.

4. The method according to claim 3, characterized in that Injecting the time reversal signal into a simulation model to diagnose the distribution of array element working states and locate failed array elements in the array antenna, including: The simulation model is a reconstruction and reproduction of a failed array element detection device based on time reversal, including an array antenna and a reference antenna located inside a closed metal cavity, and two ports on the closed metal cavity connected to the array antenna and the reference antenna respectively; The time-reversed signal is injected into a simulation model via a port connected to the reference antenna, and an electromagnetic field signal is simulated and generated in the simulation model for propagation. The distribution of the working status of the array elements is diagnosed by detecting and analyzing the energy focusing amplitude formed by the electromagnetic field signal at the location of each array element of the array antenna, and the array element with the minimum amplitude value is determined to be a failed array element. The propagation time of the electromagnetic field signal is consistent with the total time N of the transmission coefficient measurement process.

5. A device for detecting failed array elements based on time reversal, characterized in that: The device includes an array antenna and a reference antenna located inside a closed metal cavity, and a vector network analyzer and a host computer located outside the closed metal cavity; The closed metal cavity has two ports connected to the outside world, one of which is connected to the array antenna on the inside, and the other is connected to the reference antenna on the inside, so as to form a two-port network with the array antenna inside the closed metal cavity; the two ports are respectively connected to the two ends of a vector network analyzer on the outside, and the vector network analyzer is used to measure and obtain the transmission coefficient between the array antenna and the reference antenna, and convert the transmission coefficient into a time-reversal signal using a frequency-time conversion algorithm based on time inversion; The host computer is used to construct a simulation model of the time-reversal-based failed element detection device, and diagnose the distribution of the working status of the elements by injecting the time-reversal signal output by the vector network analyzer into the simulation model to locate the failed elements in the array antenna.

6. The device according to claim 5, characterized in that The device also includes cables connecting the various devices and a power supply to support normal operation of the various devices.

7. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 4 are implemented.

8. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 4 are implemented.

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