Portable self-checking terminal for carrier rocket measuring system

Abstract

The invention discloses a portable self-checking terminal for a carrier rocket measurement system, which realizes a portable rapid self-checking function for ground equipment of the measurement system before a carrier rocket whole-rocket power-up test by integrating a display control terminal, a baseband processing module, a radio frequency transceiver module and a power supply module. The method effectively replaces a traditional mode of item-by-item testing depending on various standard devices such as a signal source and a frequency spectrograph, greatly shortens the test preparation time, simplifies the test process, achieves efficient detection anytime and anywhere, remarkably reduces the test cost and human input, improves the test efficiency, meets the technical requirements of rapid launching of modern carrier rockets, and is suitable for popularization and application. And meanwhile, the working reliability of the ground test system is ensured.

Description

Technical Field

[0001] This invention belongs to the technical field of launch vehicle measurement, and particularly relates to a portable self-testing terminal for launch vehicle measurement systems. Background Technology

[0002] The launch vehicle measurement system is a crucial component of a launch vehicle, primarily responsible for acquiring flight test data, monitoring the technical status of various rocket systems before launch, and handling safety control tasks. The measurement system includes onboard units such as external measurement and safety control systems, ground-based telemetry, and space-based telemetry, as well as corresponding ground testing equipment. This ground equipment monitors the operational status of each unit during rocket integration and range testing. Therefore, the high reliability and performance of the ground testing system are critical to rocket development, testing, and flight.

[0003] During rocket integration and range testing, after the ground test system is deployed, it is not possible to quickly conduct closed-loop testing of the entire rocket-ground loop before the full rocket power-on test to check whether the entire link of the ground equipment is in normal working condition. The usual monitoring method is to use multiple standard devices such as signal sources and spectrum analyzers to conduct item-by-item tests. The test time is long and the test efficiency is low. This seriously affects the test progress and wastes manpower and resources for the current rapid launch requirements.

[0004] Therefore, in order to ensure the rapid recovery of the ground equipment of the measurement system before the launch vehicle is officially powered on for testing, a portable self-testing terminal that combines the advantages of universal integration, low cost and easy portability for testing is essential. Summary of the Invention

[0005] The purpose of this invention is to provide a portable self-testing terminal for launch vehicle measurement systems, enabling rapid testing of telemetry, external measurement, and ground control equipment.

[0006] To solve the above problems, the technical solution of the present invention is as follows: A portable self-testing terminal for a launch vehicle measurement system includes: a display and control terminal, a baseband processing module, an RF transceiver module, and a power supply and battery module; The display and control terminal is communicatively connected to the baseband processing module and is used to set test parameters and display test results through a human-machine interface. The baseband processing module is communicatively connected to the display and control terminal and the radio frequency transceiver module, respectively, and is used to complete signal generation, signal detection and signal processing according to the control instructions of the display and control terminal, including the detection of security carrier signals and pulse excitation signals, as well as the simulated transmission of ground-based telemetry signals and space-based telemetry signals; The radio frequency transceiver module includes a radio frequency transceiver port, which is used to receive or transmit radio frequency signals in a time-division manner through the radio frequency transceiver port, realize the conversion between digital baseband signals and radio frequency signals, and provide a reference clock for the baseband processing module; The power supply and battery module are electrically connected to the display and control terminal, the baseband processing module and the radio frequency transceiver module, respectively, to provide a stable power supply.

[0007] According to one embodiment of the present invention, the display and control terminal adopts a card-type computer, and realizes parameter display and control through a display screen and a touch screen; The display and control terminal is used to send the transmit and receive frequency points, telemetry system, data format, radio frequency switch status parameters, and data to be played back to the baseband processing module, and to receive the carrier center frequency and power parameters returned by the baseband processing module for display.

[0008] According to one embodiment of the present invention, the display and control terminal is further configured to play back stored data, read configuration parameter files, and output UDP protocol telemetry full-frame data streams through a wired channel Ethernet interface.

[0009] According to one embodiment of the present invention, the baseband processing module is configured to receive and detect P-band security carrier signals and C-band pulse excitation signals in a time-division manner; generate ground-based telemetry signals and space-based telemetry signals and send them to the radio frequency transceiver module; generate a wired channel PCM interface telemetry full-frame data stream; complete the software configuration of the frequency-agile radio frequency chip; and complete information interaction with the display and control terminal.

[0010] According to one embodiment of the present invention, the baseband processing module is further configured to upload the detection power of the received security carrier signal and pulse excitation signal to the display and control terminal, and to perform self-test monitoring on the power of the ground-based telemetry signal and space-based telemetry signal output by radio frequency, and upload the monitoring results to the display and control terminal.

[0011] According to one embodiment of the present invention, the radio frequency transceiver module is provided with an external radio frequency interface, and the radio frequency interface adopts an SMA type female connector to realize shared transmission and reception. The radio frequency transceiver module communicates with the RF agile transceiver chip through the FPGA, and performs time-division multiplexing of security carrier signal reception, pulse excitation signal reception, ground-based telemetry signal transmission, space-based telemetry signal transmission, or single-carrier signal transmission according to the operation control instructions of the display and control terminal.

[0012] According to one embodiment of the present invention, when the security control carrier signal detection function is selected, the radio frequency transceiver module receives the external security control carrier signal and converts it into a digital baseband signal. The baseband processing module obtains the frequency and power parameters of the security control carrier signal through digital detection and uploads them to the display and control terminal for display, so as to detect the working status of the security control ground equipment.

[0013] According to one embodiment of the present invention, when the pulse excitation signal detection function is selected, the radio frequency transceiver module receives an external pulse excitation signal and converts it into a digital baseband signal. The baseband processing module obtains the frequency, power, pulse width and period parameters of the pulse excitation signal through digital detection and uploads them to the display and control terminal for display, so as to detect the working status of the external ground equipment.

[0014] According to an embodiment of the present invention, when the ground-based telemetry signal transmission function is selected, the display and control terminal selects to play back stored data or generate regular data. The baseband processing module reads the data to be played back or generates the required data according to the data frame format. It outputs a full-frame telemetry data stream via the Ethernet interface, or outputs a full-frame telemetry data stream via the PCM interface via the wired channel, or outputs a radio frequency signal to the radio frequency transceiver module for transmission after encoding and modulation, so as to detect the working status of the ground-based telemetry equipment.

[0015] According to an embodiment of the present invention, when the space-based telemetry signal transmission function is selected, the display and control terminal selects to play back stored data or generate regular data. The baseband processing module reads the data to be played back or generates the required data according to the data frame format. It outputs a full-frame telemetry data stream via the Ethernet interface, or outputs a full-frame telemetry data stream via the PCM interface via the wired channel, or outputs a radio frequency signal to the radio frequency transceiver module for transmission after encoding, scrambling, code conversion, and modulation processing, so as to detect the working status of the space-based telemetry ground equipment.

[0016] Because the present invention adopts the above technical solution, it has the following advantages and positive effects compared with the prior art: The portable self-test terminal for a launch vehicle measurement system in one embodiment of the present invention integrates a display and control terminal, a baseband processing module, a radio frequency transceiver module, and a power supply module into one unit. This enables a portable and rapid self-test of the ground equipment of the measurement system before the launch vehicle is powered on for full-rocket testing. It effectively replaces the traditional method of relying on multiple standard devices such as signal sources and spectrum analyzers for item-by-item testing, significantly shortens test preparation time, simplifies the test process, and enables efficient testing anytime and anywhere. It significantly reduces test costs and manpower input, improves test efficiency, meets the technical requirements of rapid launch of modern launch vehicles, and ensures the reliability of the ground test system. Attached Figure Description

[0017] Figure 1 This is a block diagram of a portable self-testing terminal for a launch vehicle measurement system according to an embodiment of the present invention; Figure 2 This is a power supply topology diagram of the power supply and battery module in one embodiment of the present invention; Figure 3This is a flowchart illustrating the workflow of a portable self-testing terminal for a launch vehicle measurement system according to an embodiment of the present invention. Detailed Implementation

[0018] The following detailed description, in conjunction with the accompanying drawings and specific embodiments, provides a portable self-testing terminal for a launch vehicle measurement system proposed in this invention.

[0019] Please refer to Figure 1 This embodiment provides a portable self-test terminal for a launch vehicle measurement system, including: a display and control terminal, a baseband processing module, an RF transceiver module, and a power supply and battery module; The display and control terminal is communicatively connected to the baseband processing module and is used to set test parameters and display test results through a human-machine interface. The baseband processing module is communicatively connected to the display and control terminal and the radio frequency transceiver module, respectively. It is used to complete signal generation, signal detection and signal processing according to the control instructions of the display and control terminal, including the detection of security carrier signals and pulse excitation signals, as well as the simulated transmission of ground-based telemetry signals and space-based telemetry signals. The radio frequency transceiver module includes a radio frequency transceiver port, which is used to receive or transmit radio frequency signals in a time-division multiplexing manner through the radio frequency transceiver port, realize the conversion between digital baseband signals and radio frequency signals, and provide a reference clock for the baseband processing module; The power supply and battery modules are electrically connected to the display and control terminal, the baseband processing module, and the RF transceiver module, respectively, to provide a stable power supply.

[0020] This portable self-test terminal for the launch vehicle measurement system integrates the display and control terminal, baseband processing module, radio frequency transceiver module and power supply module into one unit. The portable self-test terminal features a small integrated design with dimensions (length × width × height) of 170mm × 100mm × 50mm and a tolerance of ±1mm. It can realize the portable and rapid self-test function of the ground equipment of the measurement system before the launch vehicle is powered on for full-rocket testing.

[0021] In one embodiment, the display and control terminal uses a card-type computer, which displays and controls parameters through a screen and a touch screen. A card-type computer is a microcomputer about the size of a credit card, integrating core components such as a processor, memory, storage, and I / O interfaces, and can directly run an operating system.

[0022] The display and control terminal is used to send parameters such as transmit and receive frequencies, telemetry system, data format, and RF switch status or data to be played back to the baseband processing module, and to receive and display the carrier center frequency and power parameters returned by the baseband processing module.

[0023] Furthermore, the display and control terminal is also configured to play back stored data, read configuration parameter files, and output UDP protocol telemetry full-frame data streams via a wired Ethernet interface.

[0024] For example, during the ground system deployment phase before range testing, closed-loop verification of the telemetry ground receiving equipment is required. Operators retrieve pre-stored flight test characteristic data frames (such as engine parameters and inertial navigation system data under specific operating conditions) through the touch interface of the display and control terminal, triggering the playback function.

[0025] When a launch vehicle is transferred to perform different types of missions or its test site is changed, the parameters of the launch vehicle's measurement system, such as frequency, code rate, and system mode, need to be changed accordingly. Technicians pre-store the configuration parameter files for each mission (including transmit / receive frequencies, telemetry system, data format definitions, RF switch logic, etc.) in XML / JSON format on local storage. At the test site, the corresponding mission configuration parameter files can be imported with a single click through the file management interface of the display and control terminal. The system automatically parses and distributes the files to the baseband processing module to complete the configuration of the frequency agile chip registers and the reload of the FPGA logic.

[0026] During the system integration testing phase, the integrated telemetry, telemetry, and control system needs to verify its real-time processing capability for telemetry data. Operators select the ground-based telemetry simulation mode, and the display and control terminal injects the generated full-frame telemetry data into the terrestrial wired local area network via UDP protocol multicast through the onboard RJ45 interface.

[0027] In one embodiment, the baseband processing module is configured to receive and detect P-band security carrier signals and C-band pulse excitation signals in a time-division manner; generate ground-based telemetry signals and space-based telemetry signals and send them to the radio frequency transceiver module; generate a wired channel PCM interface telemetry full-frame data stream; complete the software configuration of the frequency-agile RF chip; and complete information interaction with the display and control terminal.

[0028] Specifically, when the display and control terminal issues a security carrier detection command, the baseband processing module first writes a frequency control word to the frequency agile RF chip via the SPI bus, configuring the receiving local oscillator to the P-band (typically in the 400-500MHz range), and simultaneously sets the receiving channel gain parameters. When switching to the pulse excitation detection function, the baseband processing module reconfigures the frequency agile chip to the C-band (typically in the 5-6GHz range).

[0029] For the generation of ground-based telemetry signals, the baseband processing module reads telemetry frame data from its internal memory or generates virtual data according to the frame format, based on the data source selected by the display and control terminal (playback stored data or real-time generated regular data). After channel coding (such as TPC coding) and frame synchronization word insertion, the data is PCM encoded (NRZ-L / M / S format optional), and then sent to the FM modulation module to generate an FM baseband signal. This FM baseband signal is then output to the RF transceiver module.

[0030] For space-based telemetry signal generation, the baseband processing module employs a more complex signal processing chain: telemetry data undergoes CCSDS standard RS encoding, scrambling, and convolutional encoding (e.g., r=1 / 2, K=7), followed by code transformation (NRZ-L to NRZ-M) and polarity conversion to generate a PCM / BPSK modulated baseband signal. Finally, shaping and filtering are applied to improve spectral characteristics. The resulting baseband signal is then output to the RF transceiver module.

[0031] The baseband processing module integrates an asynchronous serial communication controller, which performs level conversion and drives the output of the generated telemetry full-frame data according to the RS422 level standard. The data format conforms to the IRIG-106 or GJB standard and includes frame synchronization code, subframe count, and multiple measurement parameters. The output bit rate is configurable (commonly ranging from 512Kbps to 10Mbps) and is output to an external PCM front-end device via a differential signal pair and a dedicated connector.

[0032] This baseband processing module uses a ZYNQ system-on-a-chip (SoC) chip, comprising two core parts: a processor system (PS) and a programmable logic unit (PL). The frequency-agile RF chip driver runs on an ARM processor or a MicroBlaze soft core. Based on parameters such as frequency, bandwidth, and gain sent from the display and control terminal, the processor calculates the corresponding frequency control word, filter configuration word, and gain control word, and writes them to the register group of the frequency-agile transceiver chip (such as the ADI AD9361 or a similar zero-IF transceiver) via the SPI bus.

[0033] The baseband processing module establishes a communication link with the display and control terminal via an Ethernet interface (UDP / IP protocol).

[0034] Furthermore, the baseband processing module is also configured to upload the detected power of the received security carrier signal and pulse excitation signal to the display and control terminal, and to perform self-test monitoring on the power of the ground-based telemetry signal and space-based telemetry signal output by radio frequency, and upload the monitoring results to the display and control terminal.

[0035] Specifically, the baseband processing module extracts a portion of the radio frequency monitoring signal from the transmission path of the radio frequency transceiver module through a directional coupler. This signal is then converted into an analog voltage that is logarithmically related to the power by a logarithmic detector. After being sampled and digitized by an ADC, the FPGA performs temperature and frequency compensation calculations based on a pre-stored power-voltage calibration table. The actual transmission power value is calculated in real time and compared with a set threshold to determine the status. Finally, the power value and status flag are uploaded to the display and control terminal for display, realizing self-testing and monitoring of the transmission power of ground-based telemetry and space-based telemetry signals.

[0036] In one embodiment, the RF transceiver module is provided with an external RF interface, which adopts an SMA type female connector to achieve shared transmission and reception. The RF transceiver module communicates with the RF agile transceiver chip through the FPGA, and performs time-division multiplexing of security carrier signal reception, pulse excitation signal reception, ground-based telemetry signal transmission, space-based telemetry signal transmission, or single-carrier signal transmission according to the operation control commands of the display and control terminal.

[0037] In one embodiment, the power supply and battery module includes a DC filter, a power management module, and a battery module, which has functions of voltage regulation output, power management, and power monitoring, and can provide multiple operating voltages to the baseband processing module through a secondary power supply circuit.

[0038] Please refer to Figure 2 The power supply and battery module first undergoes a DC filter to suppress transient interference, then generates an intermediate bus voltage (+5.5V or +12V) through a primary DC-DC converter circuit (wide-input isolation module). Since the FPGA, high-speed ADC / DAC, memory, and interface circuits integrated within the baseband processing module require various voltage levels, this intermediate bus voltage is fed into a secondary power supply circuit for multi-channel fine-tuning. The first path uses a synchronous buck converter to transform the +5V bus to +3.3V, which is used by the FPGA's I / O interface and external memory. The second path further steps down the voltage from +3.3V or +5V to +1.8V / 1.2V / 1.0V / 0.9V via a low-noise LDO or a dedicated DC-DC converter, serving as the FPGA core voltage (VCCINT) and auxiliary circuit power supply. The third channel generates a -5V or -12V negative voltage through an inverting charge pump or an isolated DC-DC converter to meet the dual power supply requirements of the operational amplifier and analog front end. The fourth channel, for the RS422 / PCM interface, uses an isolated DC-DC module to generate an isolated +5V or +3.3V to achieve electrical isolation between the digital ground and the communication ground.

[0039] In addition, the secondary power supply circuit also includes power timing control logic to ensure that the core voltage (1.2V) is connected first during power-up, followed by the I / O voltage (3.3V), and finally the analog circuit is enabled, thus avoiding latch-up of core devices such as FPGA. At the same time, each secondary conversion branch is equipped with an independent filter network and voltage monitoring point, and the power management module monitors the ripple and temperature of each voltage in real time to ensure the power supply stability and electromagnetic compatibility of the baseband processing module during multi-frequency and multi-system switching.

[0040] Please refer to Figure 3 Before system testing, after the ground equipment corresponding to each unit of the launch vehicle measurement system is deployed and powered on, the portable self-test terminal for the launch vehicle measurement system is activated. Functions can be selected via the display and control terminal, including: security carrier signal detection, pulse excitation signal detection, ground-based telemetry signal transmission, and space-based telemetry signal transmission. By selecting different functions, tests are conducted to determine whether different ground equipment is functioning correctly.

[0041] When security control carrier signal detection is selected, the radio frequency transceiver module will receive the signal. After the display and control terminal sets the corresponding parameters according to the security control ground equipment, the baseband processing module receives the digital baseband signal processed by the radio frequency transceiver module, obtains the frequency and power of the security control carrier signal through the digital detection module, and uploads it to the display and control terminal for display, thereby testing whether the ground equipment is transmitting the carrier signal normally.

[0042] When pulse excitation signal detection is selected, the RF transceiver module receives the signal. The display and control terminal sets the corresponding parameters according to the external ground equipment. The baseband processing module receives the digital baseband signal processed by the RF transceiver module and obtains the frequency, power, pulse width, and period of the pulse excitation signal through the digital detection module, uploading this information to the display and control terminal for display. This process tests whether the ground equipment is transmitting the pulse excitation signal normally.

[0043] When the ground-based telemetry signal transmission function is selected, the RF transceiver module will transmit modulated signals. The display and control terminal can choose to play back data or generate regular data as needed, based on the corresponding parameters set by the ground-based telemetry equipment. The baseband processing module will choose to read the stored data to be played back or generate the required data according to the data frame format. It can output a full-frame telemetry data stream via Ethernet (RJ45 interface) using the UDP protocol; or output a full-frame telemetry data stream via a wired channel (RS422 interface); or output RF signals through encoding and modulation. This tests whether the ground equipment is communicating normally.

[0044] When the space-based telemetry signal transmission function is selected, the radio frequency transceiver module will transmit modulated signals. The display and control terminal can choose to play back data or generate regular data as needed, based on the corresponding parameters set by the space-based telemetry ground equipment. The baseband processing module will choose to read the stored data to be played back or generate the required data according to the data frame format. It can output a full-frame telemetry data stream via Ethernet (RJ45 interface) using the UDP protocol; or output a full-frame telemetry data stream via a wired channel (RS422 interface); or output a radio frequency signal through encoding, scrambling, code conversion, and modulation. This tests whether the ground equipment is communicating normally.

[0045] The above operations can be used to quickly test the ground equipment of the measurement system, ensuring that the ground equipment corresponding to each unit is in normal working condition before the system or the entire rocket is tested, thereby ensuring the testing process and rapid fault location.

[0046] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments. Even if various changes are made to the present invention, if these changes fall within the scope of the claims of the present invention and their equivalents, they shall still fall within the protection scope of the present invention.

Claims

1. A portable self-testing terminal for a launch vehicle measurement system, characterized in that, include: Display and control terminal, baseband processing module, RF transceiver module, and power supply and battery module; The display and control terminal is communicatively connected to the baseband processing module and is used to set test parameters and display test results through a human-machine interface. The baseband processing module is communicatively connected to the display and control terminal and the radio frequency transceiver module, respectively, and is used to complete signal generation, signal detection and signal processing according to the control instructions of the display and control terminal, including the detection of security carrier signals and pulse excitation signals, as well as the simulated transmission of ground-based telemetry signals and space-based telemetry signals; The radio frequency transceiver module includes a radio frequency transceiver port, which is used to receive or transmit radio frequency signals in a time-division manner through the radio frequency transceiver port, realize the conversion between digital baseband signals and radio frequency signals, and provide a reference clock for the baseband processing module; The power supply and battery module are electrically connected to the display and control terminal, the baseband processing module and the radio frequency transceiver module, respectively, to provide a stable power supply.

2. The portable self-testing terminal for a launch vehicle measurement system according to claim 1, characterized in that, The display and control terminal is a card-type computer that uses a display screen and a touch screen to display and control parameters. The display and control terminal is used to send the transmit and receive frequency points, telemetry system, data format, radio frequency switch status parameters, and data to be played back to the baseband processing module, and to receive the carrier center frequency and power parameters returned by the baseband processing module for display.

3. The portable self-test terminal for a launch vehicle measurement system according to claim 2, characterized in that, The display and control terminal is also configured to play back stored data, read configuration parameter files, and output UDP protocol telemetry full-frame data streams via a wired Ethernet interface.

4. The portable self-test terminal for a launch vehicle measurement system according to claim 1, characterized in that, The baseband processing module is configured to receive and detect P-band security carrier signals and C-band pulse excitation signals in a time-division manner; generate ground-based telemetry signals and space-based telemetry signals and send them to the radio frequency transceiver module. Generate a full-frame data stream for wired channel PCM interface telemetry; complete the software configuration of the frequency-agile RF chip; and complete the information interaction with the display and control terminal.

5. The portable self-test terminal for a launch vehicle measurement system according to claim 4, characterized in that, The baseband processing module is also configured to upload the detected power of the received security carrier signal and pulse excitation signal to the display and control terminal, and to perform self-test monitoring on the power of the ground-based telemetry signal and space-based telemetry signal output by radio frequency, and upload the monitoring results to the display and control terminal.

6. The portable self-test terminal for a launch vehicle measurement system according to claim 1, characterized in that, The radio frequency transceiver module is provided with an external radio frequency interface, which adopts an SMA type female connector to achieve shared transmission and reception. The radio frequency transceiver module communicates with the RF agile transceiver chip through the FPGA, and performs time-division multiplexing of security carrier signal reception, pulse excitation signal reception, ground-based telemetry signal transmission, space-based telemetry signal transmission, or single-carrier signal transmission according to the operation control instructions of the display and control terminal.

7. The portable self-testing terminal for a launch vehicle measurement system according to any one of claims 1 to 6, characterized in that, When the security control carrier signal detection function is selected, the radio frequency transceiver module receives the external security control carrier signal and converts it into a digital baseband signal. The baseband processing module obtains the frequency and power parameters of the security control carrier signal through digital detection and uploads them to the display and control terminal for display, so as to detect the working status of the security control ground equipment.

8. The portable self-testing terminal for a launch vehicle measurement system according to any one of claims 1 to 6, characterized in that, When the pulse excitation signal detection function is selected, the radio frequency transceiver module receives the external pulse excitation signal and converts it into a digital baseband signal. The baseband processing module obtains the frequency, power, pulse width, and period parameters of the pulse excitation signal through digital detection and uploads them to the display and control terminal for display, so as to detect the working status of the external ground equipment.

9. The portable self-testing terminal for a launch vehicle measurement system according to any one of claims 1 to 6, characterized in that, When the ground-based telemetry signal transmission function is selected, the display and control terminal selects to play back stored data or generate regular data. The baseband processing module reads the data to be played back or generates the required data according to the data frame format. It outputs a full-frame telemetry data stream via the Ethernet interface using the UDP protocol, or a full-frame telemetry data stream via the PCM interface using the wired channel, or outputs a radio frequency signal to the radio frequency transceiver module for transmission after encoding and modulation, in order to detect the working status of the ground-based telemetry equipment.

10. The portable self-testing terminal for a launch vehicle measurement system according to any one of claims 1 to 6, characterized in that, When the space-based telemetry signal transmission function is selected, the display and control terminal selects to play back stored data or generate regular data. The baseband processing module reads the data to be played back or generates the required data according to the data frame format. It outputs a full-frame telemetry data stream via the Ethernet interface, or outputs a full-frame telemetry data stream via the PCM interface through the wired channel, or outputs an RF signal to the RF transceiver module for transmission after encoding, scrambling, code conversion, and modulation processing, in order to detect the working status of the space-based telemetry ground equipment.

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