Intermediate frequency signal acquisition system based on Doppler radar and upper computer

Abstract

The utility model relates to the technical field of signal processing devices, and particularly discloses a Doppler radar-based intermediate frequency signal acquisition system, which comprises a power supply and communication interface, a serial port communication transmission circuit, a DC-DC isolation power supply circuit, a micro-control unit power supply circuit, a micro-control unit, a data acquisition port and a data isolation circuit, the power supply and communication interface is connected to the upper computer and is used for data communication and power supply for the system; the DC-DC isolation power supply circuit is used for connecting the power supply and communication interface and the micro-control unit power supply circuit, and the DC-DC isolation power supply circuit and the data isolation circuit form an acquisition isolation system. Real-time acquisition, analysis and processing of intermediate-frequency signals of the microwave module can be realized, adaptation and application of the radar in engineering can be better promoted, and the radar is small, portable and convenient to use.

Description

Technical Field

[0001] The utility model relates to the technical field of signal processing devices, in particular to a Doppler radar intermediate frequency signal acquisition system. Background Technique

[0002] With the increasing popularity and application of Doppler radars, more and more devices are equipped with microwave modules with sensing functions. Different application scenarios pose more requirements for the adaptation and application of microwave modules. However, the impacts on microwave modules after different devices are assembled vary, and the noise situations are different, which brings challenges to the adaptation and application of microwave modules, resulting in often unsatisfactory effects. In order to improve the efficient application and assembly of microwave modules between different devices, it is crucial to collect and process their signals.

[0003] Currently, the existing acquisition systems have deficiencies in meeting the high-efficiency requirements of microwave modules, are difficult to adapt to the needs of different application scenarios, and when a failure occurs at the acquisition end, it is difficult to protect the safety of the host computer. Content of the Utility Model

[0004] Aiming at the deficiencies of the existing technology, the utility model provides a Doppler radar intermediate frequency signal acquisition system, which can solve the deficiencies of the existing acquisition systems in meeting the high-speed requirements of microwave modules, being difficult to adapt to the needs of different application scenarios, and when a failure occurs at the acquisition end, it is difficult to protect the safety of the host computer.

[0005] To achieve the above object, the utility model provides the following technical solution: A Doppler radar intermediate frequency signal acquisition system includes a power supply and communication interface, a serial communication transmission circuit, a DC-DC isolation power supply circuit, a microcontroller unit power supply circuit, a microcontroller unit, a data acquisition port, and a data isolation circuit;

[0006] The output end of the microcontroller unit is connected to the SMA data acquisition port, and the output end of the SMA data acquisition port is connected to the intermediate frequency circuit of the microwave module to be acquired. The microcontroller unit is used to perform ADC sampling on the signal of the intermediate frequency circuit of the microwave module, and the microcontroller unit is used to convert the data sampled by ADC into frame data that is the same as the host computer software protocol;

[0007] The microcontroller unit is connected to the power supply and communication interface through the acquisition isolation system.

[0008] Further, the power supply and communication interface is connected to the host computer for data communication and providing power for the system.

[0009] Further, the connection mode between the power supply and communication interface and the host computer is serial connection.

[0010] Further, the power supply and communication interface adopts a Type-C USB interface.

[0011] Further, the acquisition isolation system includes a DC-DC isolation power supply circuit and a data isolation circuit.

[0012] Further, the microcontroller unit is connected to the serial communication transmission circuit through a data isolation circuit, and the serial communication transmission circuit is connected to the power supply and communication interface.

[0013] Further, the input end of the microcontroller unit is connected to a microcontroller unit power supply circuit, and the microcontroller unit power supply circuit is connected to the power supply and communication interface through a DC-DC isolation power supply circuit.

[0014] The present utility model also discloses a host computer, which adopts the above-mentioned Doppler radar intermediate frequency signal acquisition system.

[0015] The present utility model also discloses a host computer, which adopts the above-mentioned Doppler radar intermediate frequency signal acquisition system.

[0016] Compared with the prior art, the present utility model provides a Doppler radar intermediate frequency signal acquisition system, which has the following beneficial effects:

[0017] This Doppler radar intermediate frequency signal acquisition system is used for the software of the host computer that is matched with it, and can realize the real-time acquisition and analysis of the intermediate frequency signal of the microwave module, with higher efficiency. The DC-DC isolation power supply circuit and the data isolation circuit work together to jointly form a powerful acquisition isolation system. When abnormal situations such as damage and short circuit occur at the end to be acquired, it can ensure the safety of the host computer system circuit. In practical applications, even if a failure occurs at the acquisition end, the isolation system can effectively prevent the failure from affecting the host computer and protect the host computer equipment from damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is the system diagram of the present utility model;

[0019] Figure 2 is the circuit diagram of the power supply and communication interface of the present utility model;

[0020] Figure 3 is the DC-DC isolation power supply circuit diagram of the present utility model;

[0021] Figure 4 is the microcontroller unit power supply circuit diagram of the present utility model;

[0022] Figure 5 is the circuit diagram of the microcontroller unit of the present utility model;

[0023] Figure 6This is the serial communication transmission circuit diagram in the present utility model;

[0024] Figure 7 This is the data isolation circuit diagram in the present utility model;

[0025] Figure 8 This is the data acquisition port circuit diagram of the present utility model;

[0026] Figure 9 This is the structure diagram of the present utility model. Specific embodiments

[0027] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

[0028] Please refer to Figures 1-9 , the present utility model provides a technical solution: a Doppler radar intermediate frequency signal acquisition system. This system includes a power supply and communication interface, a serial communication transmission circuit, a DC-DC isolation power supply circuit, a microcontroller unit power supply circuit, a microcontroller unit, an SMA data acquisition port, and a data isolation circuit.

[0029] The power supply and communication interface uses a Type-C USB interface, which is connected to the host computer. It not only realizes serial port data communication but also provides a stable power supply for the entire acquisition system. Through the power supply and communication interface, the system can perform efficient data transmission with host computer devices such as computers, ensuring real-time data interaction. At the same time, it provides reliable power support for the system to ensure the normal operation of the system.

[0030] Figure 1 In [reference], USBIKH-TYPE-C-16P refers to a Type-C USB interface with 16 pins. Among them, GND1 represents the ground pin, and VDD represents the power pin, which provides the voltage required for the normal operation of the circuit.

[0031] The DC-DC isolated power supply circuit is used to connect the power supply, the communication interface, and the microcontroller unit power supply circuit. The DC-DC isolated power supply circuit and the data isolation circuit form an acquisition isolation system. The DC-DC isolated power supply circuit and the data isolation circuit work together to constitute a powerful acquisition isolation system. The key role of this design is that when abnormal situations such as damage and short circuit occur at the acquired end, it can ensure the safety of the host computer system circuit. In practical applications, even if a fault occurs at the acquisition end, the isolation system can effectively prevent the fault from affecting the host computer and protect the host computer equipment from damage.

[0032] Figure 3 In the figure, U1 represents the chip of the DC-DC isolated power supply circuit, VDD represents the positive power supply, providing the working voltage for the circuit; L1 and L2 are inductance components, used for filtering and energy storage; C1 and C2 represent capacitance components, used for filtering and voltage stabilization; 220uF / 35V and 4.7uF / 25V respectively represent the capacitance and withstand voltage values of the capacitors; GND1 and GND2 represent the grounding pins. The principle is: After the power supply VDD is filtered by the inductors L1 and L2, it provides a stable voltage for the subsequent circuit. The capacitors C1 and C2 further filter and stabilize the voltage to ensure the normal operation of the circuit. The grounding pins GND1 and GND2 are used to provide the return path of the circuit to ensure the stability and safety of the circuit.

[0033] Figure 4 In the figure, U2 represents the chip of the microcontroller unit power supply circuit, VIN and VOUT respectively represent the input voltage and output voltage pins, with the functions of voltage conversion and regulation. ME6231A44M3G is the model of the chip; 4.7uF and 100nF represent the capacitance values of the relevant capacitors. The working principle is: U2 receives the input voltage through the VIN pin, and after internal circuit processing, outputs the required voltage from the VOUT pin. The capacitors 4.7uF and 100nF are used for filtering and voltage stabilization to ensure the stability and quality of the output voltage.

[0034] The pin PIN7 of the microcontroller unit is closely connected to the SMA data acquisition port, and the SMA data acquisition port is connected to the intermediate frequency circuit of the acquired radar module through a high-quality coaxial cable, thus constructing a complete and reliable acquisition system. The SMA data acquisition port can acquire the intermediate frequency signal of the radar module and quickly and accurately transmit it to the microcontroller unit for subsequent processing.

[0035] Figure 5Among them, U3 represents the chip of the microcontroller unit, P2 and P3 are the names of the connector interfaces; GND2 represents the ground pin; 1, 2, 3, 4, 5, 6, 7, 8, 9, 13, 14 are the pin numbers. Among them, VCC indicates that the function of this pin is power supply, PA12 and PB1 indicate input, PA8 indicates output, PA13 / SWD indicates a multiplexed pin, which has the functions of both PA13 and SWD. Similarly, PF2 / RST and PA14 / SWC also indicate that the pins are multiplexed. The working principle is as follows: The P2 connector interface is connected and communicates with other circuits through these pins. Different pins undertake different functions, including power supply, signal transmission, and control. Among them, the VCC pin provides power supply, the PA12 and PB1 pins are used for input signals, the PA8 pin is used for output signals, and the RST pin is used for reset operations.

[0036] The microcontroller unit has signal processing capabilities and can perform high-precision ADC sampling on radar intermediate-frequency signals, converting analog signals into digital signals, laying a foundation for subsequent signal processing. The sampled data will be processed by the microcontroller unit and converted into frame data that is exactly the same as the upper computer software protocol. For example, the microcontroller unit will encode and compress the data (this is the existing technology here) to ensure that the data format meets the strict requirements of the upper computer software, thereby achieving seamless data interaction. The processed data is transmitted to the data isolation circuit through two serial port pins, PIN3 and PIN4, of the microcontroller unit pins. The data isolation circuit can effectively enhance the security and stability of data transmission and prevent the influence of external interference on the data.

[0037] The data isolation circuit is closely connected to the serial communication transmission circuit, and the serial communication transmission circuit communicates with the upper computer through the power supply and communication interface at high speed and stability, thereby realizing the real-time acquisition of the intermediate-frequency circuit signals of the microwave module (i.e., Doppler radar intermediate-frequency signals). During this process, the system can ensure the accurate transmission and timely processing of signals, providing real-time and reliable signal data for users.

[0038] Figure 6Among them, U4 represents the chip of the serial communication transmission circuit, D+ represents the positive signal pin of USB data, DP is related to USB data, EE_DATA represents the signal used to transmit data related to EEPROM (Electrically Erasable Programmable Read-Only Memory), D- represents the negative signal pin of USB data, R2 and R are the identifications of resistors, 1.5k represents the resistance value of the resistor, Vo is the output voltage pin, DM and USB represent the transmission of data, VO33 is the 3.3V power output, SHTD represents shutdown or sleep control, N represents low level or invalid, EE_CLK is the EEPROM clock signal, GND is the ground pin, CTS_N is the negative of the Clear To Send signal, RST_N is the negative of the reset signal, DCD_N is the negative of the data carrier detect signal, C4 is the capacitor identification, 100ml represents the capacitance of the capacitor, VDD_5 is the 5V power input, DSR_N is the negative of the data set ready signal, NC represents unconnected or non-functional, GP0 is the general-purpose input / output pin, GPI is the general-purpose input pin, N represents low level or invalid, NC represents unconnected, RXD is the receive data signal pin, R4 is the resistor identification, TXI is the transmit data signal pin, GND1 is the ground pin, GND_A is another ground pin, VDD325 is the 3.25V power input, VO33 is the 3.3V power output, C6 is the capacitor identification, PLL represents Phase Locked Loop, TEST is the test pin, RIS_N is the negative of the receive interrupt signal, 12MHz is the clock frequency, OSCI and OSC represent oscillators, TDR_N is the negative of the transmit data ready signal, TX and RXI are the transmit and receive data signal pins respectively, and PL2303TA-SSOP28 represents the model and package form of the chip. The working principle is: U4 conducts data communication with the USB device through the D+ and D- pins, receives and sends data, conducts data interaction with the EEPROM through the EE_DATA and EE_CLK pins, and at the same time, other pins VDD_5, VDD325, and VO33 are used to provide power, the RXD and TXI pins are used for the reception and transmission of serial communication, and the GND and GND1 pins provide grounding.

[0039] Figure 7 Among them, U5 represents the chip of the data isolation circuit, VDD represents the positive power supply, providing the working voltage for the circuit, GND1 represents the ground, TXI is the transmit signal input, GND2 represents another ground, RXI is the receive signal input, and R7 represents the resistor. The principle is: VDD provides power, TXI and RXI are used for input and output signals, R7 is used to adjust the current or voltage, and GND1 and GND2 provide the ground connection.

[0040] Figure 81, 4, and 5 respectively represent pin numbers, and G represents the identifier of signal connection.

[0041] The present utility model also discloses a host computer. By combining the system specifically designed for the acquisition and processing of the intermediate-frequency circuit signals of the microwave module (i.e., the intermediate-frequency signals of the Doppler radar) with the software of the supporting host computer, it can realize the real-time acquisition, analysis, and efficient processing of the intermediate-frequency circuit signals of the microwave module. By equipping signal analysis tools in the host computer software, it can also conduct in-depth spectral analysis and time-domain analysis on the acquired signals, thereby accurately obtaining various characteristics and key parameters of the signals. For abnormal signals, corresponding measures can be taken, such as sending alarm signals and accurately recording abnormal information, etc. It can also better promote the adaptation and application of the radar in engineering. This function enables the system to quickly respond and properly handle various abnormal situations when facing complex actual application scenarios.

[0042] This system also has the remarkable characteristics of being small, portable, and easy to use, facilitating users to flexibly deploy and operate in different scenarios. When the system is connected to the paired host computer, it can intuitively present the detailed information of the microwave signal in the frequency domain or time domain. Users can clearly observe key information such as the precise waveform and accurate frequency of the signal through the host computer interface, thereby facilitating in-depth debugging and optimization of the radar system to meet various specific application requirements.

[0043] To improve the performance and reliability of the system, the algorithm of the microcontroller unit can be further optimized to improve the speed and accuracy of signal processing. For example, more advanced digital signal processing technologies can be adopted to filter and denoise the signals to improve the signal quality. In practical applications, the system can be customized according to different requirements. For example, for specific radar models and application scenarios, the parameters and configurations of the system can be adjusted to meet the personalized needs of users.

[0044] In addition, the storage function of the system can also be considered to store and playback the acquired signals. For example, storage devices such as solid-state drives can be used to store a large amount of signal data, facilitating users for subsequent analysis and processing.

[0045] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A Doppler radar intermediate frequency signal acquisition system, characterized in that: It includes a power supply and communication interface, a serial communication transmission circuit, a DC-DC isolation power supply circuit, a micro control unit power supply circuit, a micro control unit, a data acquisition port and a data isolation circuit; The output end of the microcontroller unit is connected to the SMA data acquisition port, and the output end of the SMA data acquisition port is connected to the collected microwave module intermediate frequency circuit. The microcontroller unit is used to perform ADC sampling on the signal of the microwave module intermediate frequency circuit, and the microcontroller unit is used to convert the ADC sampled data into frame data with the same protocol as the upper computer software. The micro control unit is connected to the power supply and communication interface through the acquisition isolation system connection.

2. The Doppler radar intermediate frequency signal acquisition system according to claim 1, characterized in that: The power supply and communication interface is connected to a host computer and is used for data communication and providing power to the system.

3. The Doppler radar intermediate frequency signal acquisition system according to claim 2, characterized in that: The power supply and communication interface is connected to the host computer via a serial port.

4. The Doppler radar intermediate frequency signal acquisition system according to claim 1, characterized in that: The power supply and communication interface uses a Type-C USB interface.

5. The Doppler radar intermediate frequency signal acquisition system according to claim 1, characterized in that: The acquisition isolation system includes a DC-DC isolation power supply circuit and a data isolation circuit.

6. The Doppler radar intermediate frequency signal acquisition system according to claim 5, characterized in that: The micro control unit is connected to the serial communication transmission circuit via a data isolation circuit, and the serial communication transmission circuit is connected to the power supply and communication interface.

7. The Doppler radar intermediate frequency signal acquisition system according to claim 5, characterized in that: The input end of the micro control unit is connected to a micro control unit power supply circuit, and the micro control unit power supply circuit is connected to the power supply and communication interface through a DC-DC isolation power supply circuit.

8. A host computer, characterized in that: A Doppler radar intermediate frequency signal acquisition system according to any one of claims 1 to 4 is adopted.

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