A detection device based on a triangular cone anechoic chamber combined with a recording and playback instrument and a positioning antenna.

Abstract

This application relates to the field of electronic communication testing technology, and in particular to a detection device for a positioning antenna based on a triangular pyramid anechoic chamber combined with a recorder / playback device. The device includes a triangular pyramid shielded chamber module, a recorder / playback device module, a signal conditioning module, a positioning antenna fixing module, a data acquisition and analysis module, a control module, and a display module. The triangular pyramid shielded chamber module provides an electromagnetic shielding test environment. The recorder / playback device module acquires and stores real electromagnetic environment signals or plays back test excitation signals. The input terminal of the signal conditioning module is connected to the recorder / playback device module, and its output terminal is connected to the triangular pyramid shielded chamber module, used for signal amplification, filtering, and impedance matching. The positioning antenna fixing module is located within the triangular pyramid shielded chamber module and is used to mount and adjust the spatial position and attitude of the antenna under test. The input terminal of the data acquisition and analysis module is connected to the triangular pyramid shielded chamber module and is used to acquire and analyze the performance parameters of the antenna under test.

Description

Technical Field

[0001] This application relates to the field of electronic communication testing technology, and in particular to a detection device based on a triangular cone anechoic chamber combined with a recording and playback instrument and a positioning antenna. Background Technology

[0002] Currently, performance testing of positioning antennas such as BeiDou antennas mainly relies on two methods: field testing and indoor simulation testing. While field testing can reflect antenna performance under real-world conditions, it is greatly affected by uncontrollable factors such as weather, terrain, and electromagnetic interference. Test conditions are difficult to replicate, leading to poor consistency of results, high costs, and the inability to simulate extreme scenarios. Indoor simulation testing, on the other hand, often uses triangular pyramidal shielded boxes (TEM chambers) to construct the test environment. These chambers can generate stable, approximately plane-wave electromagnetic fields and are commonly used to test antenna sensitivity, radiated power, and other indicators.

[0003] However, existing indoor testing equipment generally suffers from significant shortcomings: First, the test signals are mostly artificially generated standard signals, which differ significantly from the actual complex electromagnetic environment, resulting in low matching degree between test results and practical applications; second, it lacks the ability to reproduce real dynamic electromagnetic environments (such as urban multipath interference, vehicle vibration, and temperature coupling), making it impossible to comprehensively evaluate the antenna performance under real operating conditions; third, the test system has low integration, with signal generation, data acquisition, and antenna pose control mostly performed by independent devices, resulting in insufficient automation and difficulty in achieving efficient and accurate automated test sequences. Although RF recorders and playback devices have the ability to acquire, store, and play back real electromagnetic signals, there is currently no mature solution that deeply integrates them with triangular pyramid shielded chambers and high-precision positioning systems, leading to significant technical gaps in antenna testing in terms of realism, accuracy, and automation. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the purpose of this application is to provide a detection device based on a triangular cone anechoic chamber combined with a recording and playback instrument and a positioning antenna, which is used to solve the technical problems in the background art.

[0005] The above-mentioned objective of this application is achieved through the following technical solution: a detection device based on a triangular cone anechoic chamber combined with a recording and playback instrument and a positioning antenna, comprising a triangular cone shielding chamber module, a recording and playback instrument module, a signal conditioning module, a positioning antenna fixing module, a data acquisition and analysis module, a control module and a display module; The triangular pyramid shielding chamber module is used to provide an electromagnetic shielding testing environment; The recording and playback module is used to collect and store real electromagnetic environment signals, or to play back test excitation signals; The input terminal of the signal conditioning module is connected to the recording and playback module, and the output terminal is connected to the triangular pyramid shielding chamber module, which is used to amplify, filter and impedance match the signal; The positioning antenna fixing module is set inside the triangular pyramid shielding chamber module and is used to mount and adjust the spatial position and attitude of the antenna under test. The input terminal of the data acquisition and analysis module is connected to the triangular pyramid shielding chamber module and is used to acquire and analyze the performance parameters of the antenna under test. The control module is communicatively connected to the recording and playback module, the signal conditioning module, the positioning antenna fixing module, and the data acquisition and analysis module, respectively, and is used to control the coordinated operation of each module. The display module is connected to the control module and is used to display test information.

[0006] By adopting the above technical solution, this application constructs an integrated hardware system consisting of a triangular cone shielding chamber module, a recording and playback device module, a signal conditioning module, a positioning antenna fixing module, a data acquisition and analysis module, a control module, and a display module. Combined with systematic control logic and signal processing methods, it achieves efficient, accurate, and automated testing of the positioning antenna performance.

[0007] First, the recording and playback module collects and digitally stores complex electromagnetic signals of multiple scenarios and standards in a real environment, constructing a high-fidelity signal sample library. Second, during testing, the control module coordinates the signal conditioning module to perform low-noise amplification, band filtering, and impedance matching on the digital signals played back by the recording and playback module to reconstruct analog signals. The reconstructed high-quality test signal is then fed into the transverse electromagnetic wave unit of the triangular pyramid shielded chamber module, forming a standard, stable, and precisely controllable plane wave test field within this module. Simultaneously, the control module synchronously drives the multi-axis high-precision mechanical mechanism in the positioning antenna fixing module to automatically and accurately position the antenna under test to the preset three-dimensional spatial coordinates and attitude angle. Next, the antenna under test receives signals in the simulated real electromagnetic field, and its response output is collected in real time by the data acquisition and analysis module. This module further uses embedded algorithms to solve and analyze the original time-domain signal, extracting multi-dimensional performance parameters such as antenna gain, radiation pattern, sensitivity, and positioning error. Finally, all test process statuses, control commands, raw data, and analysis results are centrally visualized through the display module.

[0008] Furthermore, the triangular pyramid shielding chamber module includes a triangular pyramid shielding box and a transverse electromagnetic wave unit fixedly installed inside the triangular pyramid shielding box.

[0009] By adopting the above technical solution, the triangular pyramidal shielding enclosure in this application is constructed from a high-conductivity metal plate (such as aluminum alloy). Its unique geometric structure (usually a cone-shaped cavity with an equilateral triangular cross-section) and tight electromagnetic sealing design can effectively isolate external environmental electromagnetic interference from operating frequency bands ranging from hundreds of MHz to several GHz (shielding effectiveness is typically better than 80dB), thereby creating an "electromagnetic quiet zone" with extremely low background noise inside. The transverse electromagnetic wave unit, fixedly installed in the center of the enclosure, is essentially a specially designed parallel plate transmission line structure. When the test excitation signal is fed into the unit through the RF input port, a transverse electromagnetic mode propagation is generated between its two parallel plates, thereby forming an approximately uniform plane wave field with a known field strength and a determined polarization direction within the effective working area at the center of the unit.

[0010] Furthermore, the recording and playback module includes a multi-channel radio frequency recording and playback device that supports the acquisition and playback of signal frequency points from at least one of the BeiDou, GPS, GLONASS, Galileo, and QZSS systems.

[0011] By adopting the above technical solutions, the hardware design and signal processing architecture of the multi-channel RF recorder / playback device support synchronous or time-division high-sampling-rate acquisition and high-fidelity playback of specific frequency points used by different satellite navigation systems (such as B1I, B1C, and B2a frequencies of the BeiDou system, and L1C / A and L5 frequencies of the GPS system). This is achieved by integrating multiple sets of high-performance RF front-ends, analog-to-digital / digital-to-analog converters, and digital signal processing units corresponding to different frequency bands within the recorder / playback device, and by unified scheduling by the control module.

[0012] Furthermore, the positioning antenna fixing module includes a six-degree-of-freedom mechanical positioning mechanism, which includes a drive component for realizing three-dimensional translation and three-dimensional rotation.

[0013] By adopting the above technical solution, this device achieves precise, rapid, and programmable control of the antenna under test at any position and attitude in space. The implementation involves the following: the six-degree-of-freedom mechanical positioning mechanism typically consists of three linear motion modules and three rotary motion modules. Each module is driven by a high-precision servo motor and integrates feedback elements such as grating rulers or encoders, forming a closed-loop motion control system. The control module sends commands to each driving component through a motion control card or integrated controller, coordinating the movement along the six axes, thereby driving the antenna under test, mounted at its end, to accurately reach the target's three-dimensional coordinates (X, Y, Z) and target attitude angle.

[0014] Furthermore, the positioning antenna fixing module also includes a vibration simulation component integrated on the six-degree-of-freedom mechanical positioning mechanism for simulating vehicle vibration environment.

[0015] By adopting the above technical solution, this application achieves accurate simulation and coupled testing of the mechanical environment faced by the positioning antenna under actual vehicle operating conditions. The vibration simulation component (such as an electromagnetic vibration table or hydraulic exciter) is integrated into the end or base of the six-degree-of-freedom mechanical positioning mechanism and connected to the control module. During testing, the control module can synchronously drive the vibration simulation component to apply controllable and repeatable mechanical vibrations along the X, Y, and Z axes based on standard road spectra or user-defined vibration parameters. Simultaneously, the six-degree-of-freedom mechanism still performs its spatial positioning function, thereby achieving the superposition of "static / quasi-static spatial positioning" and "dynamic mechanical vibration." Furthermore, the signal conditioning module includes a low-noise amplifier, a tunable filter, and an impedance matching network connected in sequence.

[0016] By adopting the above technical solution, the signal conditioning module is integrated in series at a key node of the RF path. The low-noise amplifier first amplifies the excitation signal from the recording and playback module. Its extremely low noise figure (e.g., ≤0.4dB) ensures minimal additional noise introduced when amplifying weak signals, thus maintaining the signal-to-noise ratio of the original signal. This is particularly suitable for simulating weak satellite signal scenarios under long-distance or obstructed conditions. The amplified signal then enters a tunable filter. This filter can precisely adjust the passband to the corresponding frequency band according to the specific satellite navigation frequency point being tested (e.g., BeiDou B1, GPS L1, etc.), while strongly suppressing out-of-band spurious interference and noise, including harmonics from the recording and playback device itself or other frequency band interference introduced in the vehicle environment simulation (e.g., FM radio frequency band), thereby establishing a spectrally clean target signal field in the test environment.

[0017] Furthermore, the data acquisition and analysis module includes a signal acquisition unit and a data analysis unit; The signal acquisition device is used to acquire radio frequency signals from the triangular pyramid shielded chamber module; The data analysis unit is used to process the acquired radio frequency signals to calculate at least one performance parameter of the antenna under test, including gain, sensitivity, and positioning error.

[0018] By adopting the above technical solution, the signal acquisition unit, as a high-fidelity data acquisition front end, uses a high-speed, high-resolution analog-to-digital converter to synchronously sample and digitize the analog radio frequency signal from the output port of the triangular pyramid shielded room, thus fully preserving the time domain amplitude, phase, and transient characteristics of the signal.

[0019] The data analysis unit serves as the core processing and computation unit, processing the digitized signal stream based on built-in signal processing algorithms (such as spectrum analysis, correlation calculation, navigation message parsing, and error estimation algorithms). For antenna gain, it is calculated by comparing the output signal power of the antenna under test with that of a calibrated standard antenna under the same standard field excitation. For receiver sensitivity, it is determined by analyzing the critical level at which the antenna maintains stable position timing or navigation calculation capability under a programmed attenuation nominal test signal. For positioning error, it calculates the pseudorange and carrier phase observations of the antenna output signal and compares them with the known spatial position and clock error parameters embedded in the test signal to calculate the position deviation in real time.

[0020] Furthermore, it also includes a radio frequency switch matrix connected to the control module, used to switch the signal path between the recorder / playback module and different antennas in the triangular pyramid shielded chamber module.

[0021] By adopting the above technical solution, the highly flexible configuration and automated switching of test signal paths and test modes significantly improve the system's integration and testing efficiency. The implementation involves an RF switch matrix acting as a programmable multi-port microwave switching network. Its common port is connected to the signal output / input port of the recorder / playback module, while its multiple optional path ports are respectively connected to different antenna interfaces within the triangular pyramid shielded chamber module (e.g., one path connects to the transmitting antenna or TEM unit input port used to transmit test excitation signals, another path connects to the standard reference antenna used as a benchmark for receiving performance testing, and one or more paths connect to the antenna under test). The control module, according to a preset test procedure, sends switching commands to the RF switch matrix via a digital interface (such as GPIB, LAN, or USB) to control the on / off state of its internal microwave switches, thereby seamlessly connecting the recorder / playback module to the antenna path required for the current test within nanoseconds to microseconds.

[0022] Furthermore, the usage steps of a detection device based on a triangular cone anechoic chamber combined with a recording and playback instrument and a positioning antenna include: S1. Acquire and store real electromagnetic environment signals through the recording and playback module; S2. Install the antenna under test onto the positioning antenna fixing module, and set the test parameters and motion trajectory through the control module; S3. Control the recording and playback module to play back the stored signal, and at the same time control the positioning antenna fixing module to adjust the antenna posture according to the set trajectory; S4. The data acquisition and analysis module acquires the output signal of the antenna under test, and analyzes the antenna performance based on the output signal and the current pose information; S5. Output test process information and performance analysis results through the display module.

[0023] In summary, this application offers the following beneficial technical effects: It deeply integrates real-world environment reproduction, automated control, multi-field coupling testing, and intelligent data analysis to form a technologically advanced and fully functional positioning antenna testing solution. This significantly improves the realism, efficiency, accuracy, and depth of the testing. It is not only suitable for the R&D verification and production quality inspection of antenna products, but also provides authoritative technical means for access testing and standard setting in high-reliability application fields, possessing significant industrial application value. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure in the embodiment. Detailed Implementation

[0025] The present application will be further described in detail below with reference to the accompanying drawings.

[0026] Example, refer to Figure 1 A detection device for a positioning antenna based on a triangular pyramid anechoic chamber combined with a recorder / playback system is disclosed. The device comprises a triangular pyramid shielded chamber module, a recorder / playback system module, a signal conditioning module, a positioning antenna fixing module, a data acquisition and analysis module, a control module, and a display module. The triangular pyramid shielded chamber module provides an electromagnetic shielding test environment. The recorder / playback system module acquires and stores real electromagnetic environment signals or plays back test excitation signals. The input terminal of the signal conditioning module is connected to the recorder / playback system module, and its output terminal is connected to the triangular pyramid shielded chamber module, used for signal amplification, filtering, and impedance matching. The positioning antenna fixing module is located within the triangular pyramid shielded chamber module and is used to mount and adjust the spatial position and attitude of the antenna under test. The input terminal of the data acquisition and analysis module is connected to the triangular pyramid shielded chamber module and is used to acquire and analyze the performance parameters of the antenna under test. The control module is communicatively connected to the recorder / playback system module, the signal conditioning module, the positioning antenna fixing module, and the data acquisition and analysis module, respectively, for controlling the coordinated operation of each module. The display module is connected to the control module and is used to display test information.

[0027] In this application, an integrated hardware system consisting of a triangular pyramid shielded chamber module, a recording and playback device module, a signal conditioning module, a positioning antenna fixing module, a data acquisition and analysis module, a control module, and a display module is constructed. Combined with systematic control logic and signal processing methods, efficient, accurate, and automated testing of the positioning antenna performance is achieved.

[0028] First, the recording and playback module collects and digitally stores complex electromagnetic signals of multiple scenarios and standards in a real environment, constructing a high-fidelity signal sample library. Second, during testing, the control module coordinates the signal conditioning module to perform low-noise amplification, band filtering, and impedance matching on the digital signals played back by the recording and playback module to reconstruct analog signals. The reconstructed high-quality test signal is then fed into the transverse electromagnetic wave unit of the triangular pyramid shielded chamber module, forming a standard, stable, and precisely controllable plane wave test field within this module. Simultaneously, the control module synchronously drives the multi-axis high-precision mechanical mechanism in the positioning antenna fixing module to automatically and accurately position the antenna under test to the preset three-dimensional spatial coordinates and attitude angle. Next, the antenna under test receives signals in the simulated real electromagnetic field, and its response output is collected in real time by the data acquisition and analysis module. This module further uses embedded algorithms to solve and analyze the original time-domain signal, extracting multi-dimensional performance parameters such as antenna gain, radiation pattern, sensitivity, and positioning error. Finally, all test process statuses, control commands, raw data, and analysis results are centrally visualized through the display module.

[0029] In this example, the triangular pyramid shielding chamber module includes a triangular pyramid shielding box and a transverse electromagnetic wave unit fixedly installed inside the triangular pyramid shielding box.

[0030] In this application, the triangular pyramidal shielding enclosure is constructed from highly conductive metal sheets (such as aluminum alloy). Its unique geometric structure (typically a cone-shaped cavity with an equilateral triangular cross-section) and rigorous electromagnetic sealing design enable highly efficient isolation from external environmental electromagnetic interference in operating frequency bands ranging from hundreds of MHz to several GHz (shielding effectiveness is typically better than 80 dB), thereby creating an "electromagnetic quiet zone" with extremely low background noise inside. The transverse electromagnetic wave unit, fixedly located in the center of the enclosure, is essentially a specially designed parallel-plate transmission line structure. When a test excitation signal is fed into this unit through the RF input port, a transverse electromagnetic mode propagates between its two parallel plates, thereby forming an approximately uniform plane wave field with a known field strength and defined polarization direction within the effective working area at the center of the unit.

[0031] The recording and playback module includes a multi-channel radio frequency recording and playback unit that supports the acquisition and playback of signal frequencies from at least one of the BeiDou, GPS, GLONASS, Galileo, and QZSS systems.

[0032] The hardware design and signal processing architecture of the multi-channel RF recorder / playback unit support synchronous or time-division high-sampling-rate acquisition and high-fidelity playback of specific frequency points used by different satellite navigation systems (such as B1I, B1C, and B2a frequencies of the BeiDou system, and L1C / A and L5 frequencies of the GPS system). This is achieved by integrating multiple sets of high-performance RF front-ends, analog-to-digital / digital-to-analog converters, and digital signal processing units corresponding to different frequency bands within the recorder / playback unit, and unified scheduling by the control module.

[0033] The positioning antenna fixing module includes a six-degree-of-freedom mechanical positioning mechanism, which includes drive components for realizing three-dimensional translation and three-dimensional rotation.

[0034] This device achieves precise, rapid, and programmable control of the antenna under test at any position and attitude in space. This is achieved by using a six-degree-of-freedom mechanical positioning mechanism, typically composed of three linear motion modules and three rotary motion modules. Each module is driven by a high-precision servo motor and integrates feedback components such as grating rulers or encoders, forming a closed-loop motion control system. The control module sends commands to each drive component via a motion control card or integrated controller, coordinating the movement along the six axes to precisely guide the antenna under test, mounted at its end, to the target's three-dimensional coordinates (X, Y, Z) and target attitude angle.

[0035] The positioning antenna fixing module also includes a vibration simulation component integrated into a six-degree-of-freedom mechanical positioning mechanism to simulate the vehicle vibration environment.

[0036] This application achieves accurate simulation and coupled testing of the mechanical environment faced by the positioning antenna under actual vehicle-mounted conditions. A vibration simulation component (such as an electromagnetic vibration table or hydraulic exciter) is integrated into the end or base of a six-degree-of-freedom mechanical positioning mechanism and connected to the control module. During testing, the control module can synchronously drive the vibration simulation component to apply controllable and repeatable mechanical vibrations along the X, Y, and Z axes based on standard road spectra or user-defined vibration parameters (frequency range such as 5Hz-2000Hz, acceleration amplitude such as 0.5g-5g). Simultaneously, the six-degree-of-freedom mechanism still performs its spatial positioning function, thus achieving the superposition of "static / quasi-static spatial positioning" and "dynamic mechanical vibration." The signal conditioning module includes a low-noise amplifier, a tunable filter, and an impedance matching network connected in sequence.

[0037] The signal conditioning module is integrated in series at key nodes of the RF path. A low-noise amplifier first amplifies the excitation signal from the recording / playback module. Its extremely low noise figure (e.g., ≤0.4dB) ensures minimal additional noise introduced when amplifying weak signals, thus maintaining the original signal-to-noise ratio. This is particularly suitable for simulating weak satellite signals at long distances or under obstructed conditions. The amplified signal then enters a tunable filter. This filter precisely adjusts the passband to the corresponding frequency band based on the specific satellite navigation frequency being tested (e.g., BeiDou B1, GPS L1), while strongly suppressing out-of-band spurious interference and noise, including harmonics from the recording / playback module itself or interference from other frequency bands introduced in the vehicle environment simulation (e.g., FM radio bands), thereby establishing a spectrally clean target signal field in the test environment.

[0038] The data acquisition and analysis module includes a signal acquisition unit and a data analysis unit; The signal acquisition unit is used to acquire radio frequency signals from the triangular pyramid shielded chamber module; The data analysis unit is used to process the acquired radio frequency signals to calculate at least one performance parameter of the antenna under test, including gain, sensitivity, and positioning error.

[0039] As a high-fidelity data acquisition front-end, the signal acquisition unit uses a high-speed, high-resolution analog-to-digital converter to synchronously sample and digitize the analog radio frequency signal from the output port of the triangular pyramid shielded room, fully preserving the time-domain amplitude, phase, and transient characteristics of the signal.

[0040] The data analysis unit serves as the core processing and computation unit, processing the digitized signal stream based on built-in signal processing algorithms (such as spectrum analysis, correlation calculation, navigation message parsing, and error estimation algorithms). For antenna gain, it is calculated by comparing the output signal power of the antenna under test with that of a calibrated standard antenna under the same standard field excitation. For receiver sensitivity, it is determined by analyzing the critical level at which the antenna maintains stable position timing or navigation calculation capability under a programmed attenuation nominal test signal. For positioning error, it calculates the pseudorange and carrier phase observations of the antenna output signal and compares them with the known spatial position and clock error parameters embedded in the test signal to calculate the position deviation in real time.

[0041] It also includes an RF switch matrix connected to the control module, used to switch the signal paths between different antennas in the recorder / playback module and the triangular cone shielded chamber module.

[0042] The highly flexible configuration and automated switching of test signal paths and test modes significantly improve system integration and testing efficiency. This is achieved by using an RF switch matrix as a programmable multi-port microwave switching network. Its common port connects to the signal output / input port of the recorder / playback module, while its multiple optional path ports connect to different antenna interfaces within the triangular pyramid shielded chamber module (e.g., one path connects to the transmitting antenna or TEM unit input port used to transmit test excitation signals, another to the standard reference antenna used as a benchmark for receiving performance testing, and one or more to the antenna under test). The control module sends switching commands to the RF switch matrix via a digital interface (such as GPIB, LAN, or USB) according to a preset test procedure, controlling the on / off state of its internal microwave switches. This allows the recorder / playback module to seamlessly connect to the antenna path required for the current test within nanoseconds to microseconds.

[0043] The steps for using a detection device based on a triangular cone anechoic chamber combined with a recording and playback instrument and a positioning antenna include: S1. Acquire and store real electromagnetic environment signals through the recording and playback module; S2. Install the antenna under test onto the positioning antenna fixing module, and set the test parameters and motion trajectory through the control module; S3. Control the recording and playback module to play back the stored signal, and at the same time control the positioning antenna fixing module to adjust the antenna position according to the set trajectory; S4. The output signal of the antenna under test is acquired through the data acquisition and analysis module, and the antenna performance is analyzed based on the output signal and the current pose information; S5. Output test process information and performance analysis results through the display module.

[0044] The specific implementation process involves constructing a complete positioning antenna performance testing platform for real-world complex environments through four key technological pillars: system integration, signal reproduction, environmental simulation, and automated control. Its overall operation follows a closed-loop logic of "environment construction - attitude control - signal excitation - data acquisition - intelligent analysis," achieving accurate performance mapping and efficient evaluation from laboratory environments to real-world operating conditions. Specifically, firstly, the recording and playback module collects and digitizes complex electromagnetic signals from multiple scenarios and standards in the real world, forming a high-fidelity, reproducible signal sample library. Then, within the laboratory, a triangular pyramid shielded chamber module provides a pure electromagnetic shielding environment, and its internal transverse electromagnetic wave unit reconstructs the playback signal into a standard, uniform plane wave test field with a known field strength. Simultaneously, the control module synchronously drives the high-degree-of-freedom mechanical mechanism and vibration simulation components in the positioning antenna fixing module, accurately reproducing the antenna's arbitrary spatial attitude and dynamic mechanical environment on a real carrier. Throughout the testing process, the signal conditioning module ensures high-fidelity transmission of the RF link, the RF switch matrix enables automatic switching of test paths, and the data acquisition and analysis module collects antenna responses in real time and uses embedded algorithms for in-depth calculations to directly extract multi-dimensional parameters such as gain, sensitivity, radiation pattern, positioning error, and critical performance. All processes are uniformly scheduled by the main control computer to achieve fully automated operation, and the test status and comprehensive analysis results are centrally presented through the display module.

[0045] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A detection device based on a triangular cone anechoic chamber combined with a recording and playback instrument and a positioning antenna, characterized in that, It includes a triangular cone shielding chamber module, a recording and playback unit module, a signal conditioning module, a positioning antenna fixing module, a data acquisition and analysis module, a control module, and a display module; The triangular pyramid shielding chamber module is used to provide an electromagnetic shielding testing environment; The recording and playback module is used to collect and store real electromagnetic environment signals, or to play back test excitation signals; The input terminal of the signal conditioning module is connected to the recording and playback module, and the output terminal is connected to the triangular pyramid shielding chamber module, which is used to amplify, filter and impedance match the signal; The positioning antenna fixing module is set inside the triangular pyramid shielding chamber module and is used to mount and adjust the spatial position and attitude of the antenna under test. The input terminal of the data acquisition and analysis module is connected to the triangular pyramid shielding chamber module and is used to acquire and analyze the performance parameters of the antenna under test. The control module is communicatively connected to the recording and playback module, the signal conditioning module, the positioning antenna fixing module, and the data acquisition and analysis module, respectively, and is used to control the coordinated operation of each module. The display module is connected to the control module and is used to display test information.

2. The detection device based on a triangular cone anechoic chamber combined with a recording and playback instrument and a positioning antenna according to claim 1, characterized in that, The triangular pyramid shielding chamber module includes a triangular pyramid shielding box and a transverse electromagnetic wave unit fixedly installed inside the triangular pyramid shielding box.

3. The detection device based on a triangular cone anechoic chamber combined with a recording and playback instrument and a positioning antenna according to claim 1, characterized in that, The recording and playback module includes a multi-channel radio frequency recording and playback device that supports the acquisition and playback of signal frequency points from at least one of the BeiDou, GPS, GLONASS, Galileo, and QZSS systems.

4. The detection device based on a triangular cone anechoic chamber combined with a recording and playback instrument and a positioning antenna according to claim 3, characterized in that, The positioning antenna fixing module includes a six-degree-of-freedom mechanical positioning mechanism, which includes a drive component for realizing three-dimensional translation and three-dimensional rotation.

5. The detection device based on a triangular cone anechoic chamber combined with a recording and playback instrument and a positioning antenna according to claim 4, characterized in that, The positioning antenna fixing module also includes a vibration simulation component integrated on the six-degree-of-freedom mechanical positioning mechanism for simulating vehicle vibration environment.

6. The detection device based on a triangular cone anechoic chamber combined with a recording and playback instrument and a positioning antenna according to claim 1, characterized in that, The signal conditioning module includes a low-noise amplifier, a tunable filter, and an impedance matching network connected in sequence.

7. The detection device based on a triangular cone anechoic chamber combined with a recording and playback instrument and a positioning antenna according to claim 6, characterized in that, The data acquisition and analysis module includes a signal acquisition unit and a data analysis unit; The signal acquisition device is used to acquire radio frequency signals from the triangular pyramid shielded chamber module; The data analysis unit is used to process the acquired radio frequency signals to calculate at least one performance parameter of the antenna under test, including gain, sensitivity, and positioning error.

8. The detection device based on a triangular cone anechoic chamber combined with a recording and playback instrument and a positioning antenna according to claim 1, characterized in that, It also includes a radio frequency switch matrix connected to the control module, used to switch the signal path between the recorder / playback module and different antennas in the triangular pyramid shielded chamber module.

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