Secondary wind sounding radar sonde communication device

Abstract

The present invention discloses a secondary wind sounding radar sonde communication device. The device includes an antenna module, a radio frequency module, a main control module, a sensor module and a power supply module; the radio frequency module is used to process the inquiry signal received by the antenna module through the receiving channel of the radio frequency module and output it to the main control module, and is used to process the response signal generated by the main control module through the transmitting channel of the radio frequency module and output it to the antenna module; it is used to receive the control instructions output by the main control module to control the working state and channel gain of the receiving channel and the transmitting channel; the main control module is used to parse the ground radar instructions, generate control instructions according to the receiving and transmitting states, and form the sensing data of the sensor module into a response signal according to the code rate. Compared with the prior art, the present invention simplifies the design of the communication device, reduces the complexity of signal processing, and improves the reliability of the system.

Description

Technical Field

[0001] The invention relates to the field of radars, and in particular to a sonde communication device of a secondary wind sounding radar. Background Art

[0002] With the advancement of science and technology, human activities are increasingly dependent on meteorological information. Whether it is scientific research work such as military and aerospace, or agriculture and people's daily travel, they are all greatly affected by the weather. Therefore, the research of various meteorological activities has received more and more attention. Secondary wind sounding radar is a special meteorological instrument serving atmospheric science. It uses radio means to achieve meteorological measurement. It consists of ground radar and a sounding meteorology instrument carrying a sounding instrument. The ground radar is used in conjunction with the sounding instrument installed on the sounding balloon to obtain meteorological parameters such as wind direction, wind speed, temperature, air pressure, temperature, etc. at all levels from the ground to 30km in the air. The communication device is the core device of the sounding instrument that receives the ground radar interrogation signal and transmits the response signal carrying meteorological data. Therefore, improving the reliability of the sounding instrument communication device is the key to ensuring the detection of meteorological data.

[0003] However, in the prior art, the circuit design of the sonde communication device is complex, the integration is low, the signal processing calculation is large, and the hardware processing capability is high, resulting in low reliability of the sonde communication device. During the operation of the sounding radar, the sonde communication device frequently fails, and the transmission of meteorological detection data is often interrupted or intermittent, which makes it difficult to ensure the smooth completion of the meteorological detection task, bringing great difficulties to the meteorological detection work.

[0004] How to improve the reliability of the sonde communication device is a difficult problem that technical personnel in this field need to solve. Summary of the invention

[0005] The purpose of the present invention is to disclose a secondary wind sounding radar sonde communication device to improve the reliability of the system. In order to achieve the purpose of the present invention, the present invention provides a secondary wind sounding radar sonde communication device. The device includes an antenna module, a radio frequency module, a main control module, a sensor module and a power supply module; wherein,

[0006] The antenna module is connected to the radio frequency module and is used to receive the inquiry signal of the ground radar and transmit the response signal to the ground radar;

[0007] The RF module is connected to the antenna module and the main control module, and includes a RF front-end unit and a RF transceiver unit, which is used to process the inquiry signal received by the antenna module through the receiving channel of the RF module and output it to the main control module; it is used to process the response signal generated by the main control module through the transmitting channel of the RF module and output it to the antenna module; it is used to receive the RF transceiver control instruction output by the main control module to control the working state of the receiving channel and the transmitting channel of the RF transceiver unit, and control the receiving channel gain and the transmitting channel gain; it is used to receive the RF front-end control instruction output by the main control module, and is used to turn on or off the receiving channel power supply of the RF front-end unit and the amplifier enable of the transmitting channel;

[0008] The main control module is connected to the sensor module and the RF module, and is used to receive the signal output by the RF module and analyze the ground radar command; to generate RF transceiver control commands and RF front-end control commands according to the receiving and transmitting states, and output them to the RF module; to form a response signal from the sensing data of the sensor module according to the code rate specified by the ground radar command, and output it to the RF module;

[0009] The sensor module is used to generate sensing data and output it to the main control module;

[0010] The power module is used for power conversion and power management, and provides power for each module.

[0011] Further, in the technical solution disclosed in the present invention, the main control module receives the signal output by the RF module, transmits it to the detection unit via the AD unit and the storage unit, the detection unit outputs the detection result to the MCU unit, the MCU unit determines whether the ground radar instruction is received, and outputs the RF transceiver control instruction and the RF front-end control instruction to the RF module via the FPGA unit; the timer receives the clock of the FPGA unit to generate a timing signal, and sends an opening or closing trigger signal to the AD unit and the DA unit; the modulation unit uses the waveform output by the storage unit as a carrier, modulates the received sensing data to form a response signal, and outputs it to the RF module via the delayed forwarding unit and the DA unit.

[0012] Furthermore, in the technical solution disclosed in the present invention, the main control module outputs RF transceiver control instructions to the RF module through the SPI interface, and outputs RF front-end control instructions to the RF module through the IO interface.

[0013] Furthermore, in the technical solution disclosed in the present invention, the RF module includes an RF front-end unit and an RF transceiver unit; the receiving channel of the RF front-end unit includes a first bandpass filter, a first low-noise amplifier, a second bandpass filter and a second low-noise amplifier; the transmitting channel of the RF front-end unit includes a third bandpass filter, a third low-noise amplifier, a fourth bandpass filter and a power amplifier.

[0014] Furthermore, in the technical solution disclosed in the present invention, the antenna module includes an impedance matching unit, a receiving antenna and a transmitting antenna.

[0015] Furthermore, in the technical solution disclosed in the present invention, the power module includes a battery and a power management unit, and the power management unit includes a first DC-DC converter, a second DC-DC converter, a first low-voltage linear regulator, a second low-voltage linear regulator and a third low-voltage linear regulator block.

[0016] Preferably, in the technical solution disclosed in the present invention, the receiving antenna and the transmitting antenna are copper sheet antennas.

[0017] Preferably, in the technical solution disclosed in the present invention, the receiving antenna and the transmitting antenna operate in the microwave L band.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] (1) Simplified circuit design of communication devices

[0020] In the technical solution disclosed in the present invention, the core modules of the communication device mainly include a radio frequency module and a main control module, wherein the radio frequency module is used to complete the reception and transmission of radio frequency signals, and the main control module is used to complete the processing of received signals, the generation of response signals and the control of the communication device. The radio frequency module controls the gain of the receiving channel and the gain of the transmitting channel by receiving instructions. With this design method, the AGC (automatic control) unit is omitted; further, the main control module is composed of an FPGA unit and an MCU unit, and the hardware functions are implemented through programmable language design, and multiple traditional functional units are integrated together, which greatly reduces the complexity of the circuit design. Therefore, compared with the prior art, the technical solution disclosed in the present invention greatly simplifies the circuit design of the communication device, which is conducive to improving the reliability of the communication device.

[0021] (2) Reduced signal processing computational complexity

[0022] In the technical solution disclosed in the present invention, the RF module controls its receiving channel gain and transmitting channel gain by receiving instructions from the main control module, and the instructions are generated by the main control module by receiving and parsing ground radar instructions, so that the cumbersome gain control calculation process can be completed by the ground radar, and the RF module only needs to control the channel gain according to the instruction content. Further, the main control module sends instructions to the RF module according to the receiving and transmitting working status to control the working status of the receiving channel and the transmitting channel. The MCU unit of the main control module controls the AD unit and the DA unit to send on or off according to the content of the parsed ground radar signal, thereby realizing the working status control of each functional unit of the main control module; through the above technical features, the invalid work of the RF module and each functional unit of the main control module is avoided, the invalid signal processing calculation is greatly reduced, and the work efficiency is improved. Therefore, compared with the prior art, the technical solution disclosed in the present invention greatly reduces the amount of signal processing calculation, which is conducive to improving the reliability of the communication device.

[0023] (3) Improved the reliability of meteorological information transmission

[0024] In the technical solution disclosed in the present invention, a "response signal" is formed by a "storage-modulation-forwarding" method. The modulation unit of the main control module uses the waveform output by the storage unit as a carrier to modulate the received sensing data to form an "response signal", which is then output through a delayed forwarding unit to complete the modulation process. In this way, the sonde communication device omits the traditional resonance module, phase shift module, signal generation module, etc., which not only reduces costs, power consumption and volume, but also helps to improve the endurance of the sonde; further, the sonde communication device uses a "storage-modulation-forwarding" method to form a "response signal", and also makes the "response signal" of the sonde and the "inquiry signal" of the ground radar have a good autocorrelation characteristic. By using this autocorrelation, the ground radar can effectively enhance the ability to resist channel noise interference when parsing the "response signal". Therefore, compared with the prior art, the technical solution disclosed in the present invention is conducive to improving the reliability of meteorological information transmission.

[0025] Other advantages and features of the present invention will be reflected in part through the following description, and in part will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 Communication device block diagram

[0027] Figure 2 Principle block diagram of the main control module of the communication device

[0028] Figure 3 Principle block diagram of the radio frequency module of the communication device

[0029] Figure 4 Communication device power module principle block diagram DETAILED DESCRIPTION

[0030] The present invention is further described in detail below in conjunction with embodiments and drawings so that those skilled in the art can implement the invention with reference to the description.

[0031] The communication device is the core device of the secondary wind sounding radar sonde. The reliability of the communication device also determines the reliability of meteorological data transmission. How to improve the reliability of the sonde communication device is a difficult problem that the secondary wind sounding radar sonde communication device needs to solve.

[0032] In order to solve the problems existing in the prior art, the inventors have conducted in-depth research on the principles of wind sounding radar systems, innovated the signal processing method of airborne sounding instruments, innovatively designed sounding instrument communication devices, simplified the complexity of the communication device design, reduced the amount of signal processing calculations of the communication device, and improved the working reliability. On this basis, the embodiment of the present invention discloses a secondary wind sounding radar sounding instrument communication device, which starts from the perspective of simplifying the complexity of the communication device and reducing the amount of signal processing calculations to improve the working reliability of the airborne sounding instrument. Figure 1 As shown, the communication device includes an antenna module, a radio frequency module, a main control module, a sensor module and a power module; wherein,

[0033] The antenna module is connected to the radio frequency module and is used to receive the inquiry signal of the ground radar and transmit the response signal to the ground radar;

[0034] The RF module is connected to the antenna module and the main control module, and includes a RF front-end unit and a RF transceiver unit, which is used to process the inquiry signal received by the antenna module through the receiving channel of the RF module and output it to the main control module; it is used to process the response signal generated by the main control module through the transmitting channel of the RF module and output it to the antenna module; it is used to receive the RF transceiver control instruction output by the main control module to control the working state of the receiving channel and the transmitting channel of the RF transceiver unit, and control the receiving channel gain and the transmitting channel gain; it is used to receive the RF front-end control instruction output by the main control module, and is used to turn on or off the receiving channel power supply of the RF front-end unit and the amplifier enable of the transmitting channel;

[0035] The main control module is connected to the sensor module and the RF module, and is used to receive the signal output by the RF module and analyze the ground radar command; to generate RF transceiver control commands and RF front-end control commands according to the receiving and transmitting states, and output them to the RF module; to form a response signal from the sensing data of the sensor module according to the code rate specified by the ground radar command, and output it to the RF module;

[0036] The sensor module is used to generate sensing data and output it to the main control module;

[0037] The power module is used for power conversion and power management, and provides power for each module.

[0038] In the prior art, the receiving channel and transmitting channel of the sonde communication device are always in working state, which will greatly increase the power consumption and seriously shorten the working time of the sonde in the air. In fact, only after the sonde communication device receives the "inquiry signal" sent by the ground radar, the sonde communication device will send back the "response signal" containing the sounding code, that is, the "inquiry signal" and the "response signal" are time-sharing, so that the receiving channel and the transmitting channel of the sonde communication device are also time-sharing. In the prior art, it is unnecessary for the receiving channel and the transmitting channel of the sonde communication device to be always in working state, which will cause the ineffective work of each functional unit and increase the signal processing calculation amount of the communication device.

[0039] In order to solve the problems existing in the prior art, in the technical solution disclosed in the implementation of the present invention, the working states of the receiving channel and the transmitting channel of the sonde communication device are reasonably divided. The communication device analyzes the "inquiry signal" of the ground radar by receiving and processing the signal received by the antenna module to determine whether the transmitting channel of the communication device switches the working state. Typically, the working states of the communication device are divided into receiving / transmitting, standby and dormant. The sonde communication device can be divided into a receiving channel and a transmitting channel according to the signal processing flow; when the balloon just works, it is in a receiving state and receives the "inquiry signal" transmitted by the ground radar. At this time, the transmitting channel of the radio frequency module of the communication device is closed, and the amplifier of the transmitting channel is powered off; after the sonde communication device receives the "inquiry signal" transmitted by the radar, the receiving channel of the radio frequency module is closed, the transmitting channel is turned on, and the amplifier of the transmitting channel is powered on. Further, in the technical solution disclosed in the implementation of the present invention, the main control module of the communication device receives the signal output by the radio frequency module and analyzes the signal content, and generates radio frequency transceiver control instructions and radio frequency front-end control instructions according to the receiving and transmitting states; wherein the radio frequency transceiver control instructions are used to control the working state of the receiving channel and the transmitting channel of the radio frequency transceiver unit, and the radio frequency front-end control instructions are used to turn on or off the receiving channel power supply of the radio frequency front-end unit and the amplifier enable of the transmitting channel. If there is no working state management, the receiving channel and the transmitting channel of the radio frequency module are always in the same open state, and the amplifiers in the channel need to be powered on, the signal processing calculation amount is greatly increased, and the power consumption is also greatly increased; after the working state management is adopted, the communication device works according to the receiving / transmitting, standby and dormant working states; typically, the receiving channel of the communication device works in the receiving state for 20ms per second, the transmitting channel works in the transmitting state for 20ms, and the receiving channel and the transmitting channel work in the standby state for 960ms; compared with the prior art, the signal processing calculation amount can be reduced by more than half, and the power consumption will also be reduced accordingly. Typically, if the antenna module of the communication device does not receive the "inquiry signal" from the ground radar for 10ms, the communication device will enter a dormant state, and the dormant time can be set according to whether the speed of the sounding balloon can be effectively tracked. In the dormant working state of the communication device, only the MCU (Microcontroller Unit) unit of the main control module works, which will greatly reduce the communication device's demand for signal processing calculations, which is conducive to further reducing the power consumption of the sonde and extending the working time in the air.

[0040] In the prior art, since the distance between the ground radar and the airsonde changes dynamically between 0 and 30 km, the ground radar sends out an "inquiry signal", and the power of the signal reaching the airsonde also changes greatly with the change of distance; in order to adapt to this change, the airsonde communication device in the prior art is usually provided with an automatic gain control (AGC) unit, so that the gain of the amplifier circuit is automatically adjusted with the strength of the received signal to amplify or attenuate the power of the received signal, so that the back end can better complete the ground radar signal processing. The AGC unit is usually formed by a closed-loop circuit, including a gain-controlled amplifier circuit and a control voltage forming circuit. The AGC unit needs to complete signal power amplification and signal power attenuation, and perform gain control by repeatedly comparing the existing power with the target power. This process is relatively cumbersome, and a large amount of electrical energy is consumed in the process, shortening the working time of the airsonde.

[0041] In order to reduce the equipment complexity of the sonde communication device and simplify the circuit design, the inventor innovatively designed the sonde communication device, by measuring the distance between the ground radar and the air sonde, according to the sonde receiving power and transmitting power requirements, the receiving channel gain and transmitting channel gain of the air sonde communication device are calculated, and the ground radar sends instructions to the sonde to control the receiving channel gain and transmitting channel gain of the air sonde communication device. Further, in the technical solution disclosed in the implementation of the present invention, the main control module of the communication device receives and processes the "inquiry signal" received by the antenna and parses the ground radar instructions, extracts the gain control instruction content transmitted by the ground radar, forms the RF transceiver control instruction and outputs it to the RF module to control the receiving channel gain and transmitting channel gain of the RF module. With this design method, the sonde communication device can omit the AGC unit, avoid the cumbersome gain control process, not only reduce the complexity of the communication device, but also save power consumption and improve work reliability.

[0042] Further, in the technical solution disclosed in the implementation of the present invention, the main control module outputs RF transceiver control instructions to the RF module through the SPI (Serial Peripheral Interface) interface, and outputs RF front-end control instructions to the RF module through the IO interface. SPI is a commonly used serial communication protocol, which is widely used in communication between microcontrollers and peripheral devices and is a serial peripheral device interface.

[0043] Further, in the technical solution disclosed in the implementation of the present invention, the principle block diagram of the main control module of the communication device is as follows: Figure 2As shown. The main control module is composed of an FPGA unit and an MCU unit. The hardware functions are implemented through programmable language design, and multiple traditional functional units are integrated together, which greatly reduces the complexity of circuit design. The main control module receives the signal output by the RF module, and transmits it to the detection unit through the AD unit and the storage unit. The detection unit outputs the detection result to the MCU unit. The MCU unit determines whether the ground radar instruction is received, and outputs the RF transceiver control instruction and the RF front-end control instruction to the RF module through the FPGA unit; the timer receives the clock of the FPGA unit to generate a timing signal, and sends an opening or closing trigger signal to the AD unit and the DA unit; the modulation unit uses the waveform output by the storage unit as a carrier, modulates the received sensing data to form a response signal, and outputs it to the RF module through the delay forwarding unit and the DA unit. Further, the main control module converts the sensing data of the sensor module into a response signal according to the code rate specified by the ground radar instruction, and outputs it to the RF module. The code rate of the response waveform of the airborne sonde is controlled to counteract the noise interference of the response waveform during the information transmission process, so as to improve the reliability of the transmission of the sensing data.

[0044] In the technical solution disclosed in the implementation of the present invention, when the balloon just starts working, it is in a receiving state, the main control module controls the entire system to enter the receiving mode, and the timer controls the AD module of the main control chip to start working by sending an "open" trigger signal to receive the "inquiry signal" emitted by the ground radar; at this time, the RF module controls the receiving channel of the RF transceiver unit to be in a working state and the transmitting channel to be in a standby state by receiving the RF transceiver control instructions and the RF front-end control instructions of the main control module, and controls the power amplifier of the transmitting channel of the RF front-end unit to be powered off; when the main control module receives the "inquiry signal" emitted by the radar and parses the internal If the main control module analyzes the signal content of the ground radar "inquiry signal" normally, the entire communication device enters the transmission mode by sending the RF transceiver control command and the RF front-end control command; the main control module starts to modulate and forward, generates an "answer signal", and the timer outputs the "open" trigger signal to the DA unit, and the "answer signal" is sent to the transmission channel of the RF module through the DA unit; the RF module opens the transmission channel by receiving the RF transceiver control command and the RF front-end control command, and controls the gain of the transmission channel, and the transmission channel power supply and amplifier enable of the RF front-end are turned on; at this time, the receiving channel of the RF module is turned off. If the main control module does not analyze the ground radar "inquiry signal", the MCU controls the entire communication device to enter sleep mode, the timer turns off the AD unit and DA unit of the main control module, the receiving channel and the transmitting channel of the RF module are turned off, and the power supply and enable of the RF front-end are turned off. In this way, by reasonably controlling the working state of each functional module of the communication device, the invalid work of each functional unit is effectively avoided, the reliability of the work is improved, and it is also beneficial to reduce the power consumption of the communication device and extend the working time in the air.

[0045] Through the above analysis, it can be known that in the technical solution disclosed in the embodiment of the present invention, the RF module controls its receiving channel gain and transmitting channel gain by receiving the instructions of the main control module, and the instructions are generated by the main control module by receiving and parsing the ground radar instructions, so that the cumbersome gain control calculation process can be completed by the ground radar, and the RF module only needs to control the channel gain according to the instruction content. Further, the main control module sends instructions to the RF module according to the receiving and transmitting working status to control the working status of the receiving channel and the transmitting channel. The MCU unit of the main control module controls the AD unit and the DA unit to send on or off according to the content of the analyzed ground radar signal, thereby realizing the working status control of each functional unit of the main control module; through the above technical features, the invalid work of the RF module and each functional unit of the main control module is avoided, the invalid signal processing calculation is greatly reduced, and the work efficiency is improved.

[0046] In the existing technology, the secondary wind sounding radar system sends an "inquiry signal" through the ground radar, triggering the aerial sonde to send back a "response signal" to achieve meteorological detection data transmission. However, the "inquiry signal" sent by the ground radar and the "response signal" sent by the sonde in the existing system have poor correlation, and the meteorological data transmission process is easily interfered by noise, resulting in weak anti-interference ability of the "response signal" channel during transmission, and even the inability to extract meteorological information.

[0047] In order to solve the problems existing in the prior art, in the technical solution disclosed in the embodiment of the present invention, the sonde communication device adopts the "store-modulate-forward" method to form an "answer signal" to enhance the correlation between the "inquiry signal" and the "answer signal"; the ground radar uses this correlation to receive and demodulate data, which can effectively enhance the reliability of meteorological data transmission and the ground radar's ability to parse data. Specifically, the modulation unit of the main control module uses the waveform output by the storage unit as a carrier, modulates the received sensing data to form an "answer signal", and then outputs it to the RF module through the delay forwarding unit and the DA unit, and is processed by the RF module's transmission channel and output to the antenna module, and is sent to the ground radar through the transmitting antenna. The "store-modulate-forward" method is adopted to form the "response signal", and the sonde communication device eliminates the traditional resonance module, phase shift module, signal generation module, etc., which not only reduces the cost, power consumption and volume, but also helps to increase the endurance time of the sonde; further, the sonde communication device adopts the "store-modulate-forward" method to form the "response signal", and also makes the "response signal" of the sonde and the "inquiry signal" of the ground radar have better autocorrelation characteristics. By using this autocorrelation, the ground radar can effectively resist channel noise interference when parsing the "response signal", which is beneficial to improve the reliability of meteorological information transmission.

[0048] Furthermore, in the technical solution disclosed in the implementation of the present invention, for low-cost small applications in industrial users and communication industries, the main control module adopts a domestic brand main control chip, and achieves higher functionality at the lowest cost based on low-power technology. The main control module includes an MCU unit and an FPGA unit. The MCU unit is mainly used to complete the upper-level logic control of the PS (Processing System), and the FPGA unit can realize clock signal and IO signal control during operation. The main control module is provided with a sensor interface for sensing data transmission with the sensor module, and the corresponding control pins are reserved according to the communication protocol and electrical standards of the sensor. The main control module uses the SPI interface and IO to transmit control signals with the RF module.

[0049] Further, in the technical solution disclosed in the implementation of the present invention, the principle block diagram of the radio frequency module of the communication device is as follows Figure 3 As shown. The RF module includes an RF front-end unit and an RF transceiver unit; the receiving channel of the RF front-end unit includes a first bandpass filter, a first low-noise amplifier, a second bandpass filter and a second low-noise amplifier; the transmitting channel of the RF front-end unit includes a third bandpass filter, a third low-noise amplifier, a fourth bandpass filter and a power amplifier. Among them, the bandpass filter is used to filter out interference signals other than 1680M, so that useful signals enter the RF channel and useless signals are suppressed. From the perspective of design and cost, a comprehensive analysis is conducted. The bandpass filter is implemented by a microstrip filter or an LC filter combined with a separation device, which has low cost, small size, and self-controllable design; the low-noise amplifier is used to amplify small signals, reduce the passing noise, and improve the signal quality. The low-noise amplifier uses a domestic amplifier chip with the characteristics of high gain, low noise and low power consumption, which can maintain the accuracy and clarity of the signal, amplify small signals, and improve the signal-to-noise ratio and receiving sensitivity of the communication device; the power amplifier is used to adjust the signal amplitude and output high power to the antenna module. Further, in the technical solution disclosed in the implementation of the present invention, the RF transceiver unit of the RF module adopts a high-performance, highly integrated ultra-wideband SDR transceiver, which can support a frequency range of 30MHz to 6000M, and a configurable RF bandwidth can support a range of 1MHz to 100MHz, and integrates a mixer and a phase-locked loop. The RF transceiver unit adopts a direct frequency conversion architecture, which can achieve high modulation accuracy and ultra-low noise, and has functions such as image suppression calibration, local oscillator leakage calibration, transmission power monitoring, spurious suppression, and receiving channel gain calibration.

[0050] Further, in the technical solution disclosed in the implementation of the present invention, the RF module receives the signal transmitted by the ground radar through the receiving antenna, including useful signals and out-of-band signals, and first passes through the bandpass filter to filter out the signals outside 1680MHz, and selects the useful signal to enter the receiving channel; then the signal passes through the amplifier to adjust the signal amplitude so that the signal amplitude entering the RF module meets the signal range of normal operation of the chip. The transmission channel of the RF module outputs a signal with a center frequency of 1680MHz and a bandwidth of 10MHz. The maximum signal amplitude is about 0dBm. The signal amplitude can be adjusted by adjusting the gain control inside the chip. The output signal of the RF module includes RF signals, harmonic signals, and local oscillator leakage, etc. It first passes through the bandpass filter to filter out harmonics and stray signals, and selects useful signals to enter the transmission channel; then the signal passes through the amplifier to adjust the signal amplitude and radiates through the transmitting antenna.

[0051] Furthermore, in the technical solution disclosed in the implementation of the present invention, the antenna module includes an impedance matching unit, a receiving antenna and a transmitting antenna, which are mainly used to receive the interrogation signal of the ground radar and send a response signal to the ground radar; wherein the impedance matching unit is used to achieve impedance matching between different circuits, matching the circuit of the antenna part to 50 ohms impedance, and then connected to the radio frequency module; the antenna is designed as a copper sheet antenna, and the installation method is to hang it at the bottom of the balloon, and the antenna and the radio frequency module are directly connected.

[0052] Further, in the technical solution disclosed in the embodiment of the present invention, the power module includes a battery and a power management unit, and the power management unit includes a first DC-DC converter, a second DC-DC converter, a first low-voltage linear regulator, a second low-voltage linear regulator and a third low-voltage linear regulator block, such as Figure 4 shown.

[0053] Although the embodiments of the present invention have been disclosed above, they are not limited to the application methods listed in the specification and the embodiment. It can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily realized. Therefore, without departing from the general concept defined by the claims and equivalent scope, the present invention is not limited to specific details.

Claims

1. A secondary wind sounding radar sonde communication device, characterized in that: It includes antenna module, radio frequency module, main control module, sensor module and power module; among them, The antenna module is connected to the radio frequency module and is used to receive the inquiry signal of the ground radar and transmit the response signal to the ground radar; The RF module is connected to the antenna module and the main control module, and includes a RF front-end unit and a RF transceiver unit, which is used to process the inquiry signal received by the antenna module through the receiving channel of the RF module and output it to the main control module; it is used to process the response signal generated by the main control module through the transmitting channel of the RF module and output it to the antenna module; it is used to receive the RF transceiver control instruction output by the main control module to control the working state of the receiving channel and the transmitting channel of the RF transceiver unit, and control the receiving channel gain and the transmitting channel gain; it is used to receive the RF front-end control instruction output by the main control module, and is used to turn on or off the receiving channel power supply of the RF front-end unit and the amplifier enable of the transmitting channel; The main control module is connected to the sensor module and the RF module, and is used to receive the signal output by the RF module and analyze the ground radar command; is used to generate RF transceiver control commands and RF front-end control commands by receiving and analyzing the ground radar command according to the receiving and transmitting states, and output them to the RF module; is used to convert the sensing data of the sensor module into a response signal at the code rate specified by the ground radar command, and output it to the RF module; The sensor module is used to generate sensing data and output it to the main control module; The power module is used for power conversion and power management, providing power for each module; The main control module receives the signal output by the RF module, and transmits it to the detection unit via the AD unit and the storage unit. The detection unit outputs the detection result to the MCU unit. The MCU unit determines whether the ground radar instruction is received, and outputs the RF transceiver control instruction and the RF front-end control instruction to the RF module via the FPGA unit; the timer receives the clock of the FPGA unit to generate a timing signal, and sends an opening or closing trigger signal to the AD unit and the DA unit; the modulation unit uses the waveform output by the storage unit as a carrier, modulates the received sensing data to form a response signal, and outputs it to the RF module via the delayed forwarding unit and the DA unit.

2. The secondary wind sounding radar sonde communication device according to claim 1, characterized in that: The main control module outputs RF transceiver control instructions to the RF module via the SPI interface, and outputs RF front-end control instructions to the RF module via the IO interface.

3. The secondary wind sounding radar sonde communication device according to claim 1, characterized in that: The RF module includes an RF front-end unit and an RF transceiver unit; the receiving channel of the RF front-end unit includes a first bandpass filter, a first low-noise amplifier, a second bandpass filter and a second low-noise amplifier; the transmitting channel of the RF front-end unit includes a third bandpass filter, a third low-noise amplifier, a fourth bandpass filter and a power amplifier.

4. The secondary wind sounding radar sonde communication device according to claim 1, characterized in that: The antenna module includes an impedance matching unit, a receiving antenna and a transmitting antenna.

5. The secondary wind sounding radar sonde communication device according to claim 1, characterized in that: The power module includes a battery and a power management unit, and the power management unit includes a first DC-DC converter, a second DC-DC converter, a first low-voltage linear regulator, a second low-voltage linear regulator and a third low-voltage linear regulator block.

6. The secondary wind sounding radar sonde communication device according to claim 4, characterized in that: The receiving antenna and the transmitting antenna are copper sheet antennas.

7. The secondary wind sounding radar sonde communication device according to claim 4, characterized in that: The receiving antenna and the transmitting antenna operate in the microwave L band.

Images