Radar signal acquisition system

Abstract

The utility model relates to a radar signal acquisition system, which relates to the technical field of reversing radar, and comprises a plurality of radar signal acquisition devices, each radar signal acquisition device is provided with a plurality of serial ports, and each radar signal acquisition device can be connected with an upper computer or other radar signal acquisition devices. Each radar signal collector can be connected with a plurality of radars through a plurality of serial ports. The radar signal acquisition circuit board solves the problems of high integration level, complex circuit, high production cost, high maintenance and detection cost and high requirement on engineer quality of a radar signal acquisition circuit board in the prior art, and has the characteristics of simple circuit, low wiring difficulty, easy installation and low maintenance cost.

Description

Technical Field

[0001] This invention relates to the field of reversing radar technology, specifically to a radar signal acquisition device. Background Technology

[0002] Millimeter-wave radar is widely used in the automotive field. With the popularization of intelligent driving, radar and cameras are the hardware facilities on which intelligent driving capabilities rely. The number and accuracy of radars are related to the accuracy of intelligent driving. When many manufacturers focus on increasing radar performance, they often ignore the degree of hardware integration, production and purchase costs, as well as the difficulty and cost of installation and maintenance. They often use a large number of high-performance radars, and the radar control board is integrated on a complete board. When it is damaged or there are quality control problems, the repair and testing costs are extremely high. Moreover, as the performance increases, the unit price of the product increases even faster, resulting in poor economic efficiency. Summary of the Invention

[0003] This invention proposes a radar signal acquisition device that solves the problems of high integration of radar signal acquisition circuit boards, complex circuits, high production costs, high maintenance and testing costs, and high requirements for engineers in the prior art. It features simple circuits, low wiring difficulty, easy installation, and low maintenance costs.

[0004] The technical solution of the present invention is as follows:

[0005] A radar signal acquisition system includes multiple radar signal acquisition units, each with multiple serial ports. Each radar signal acquisition unit can be connected to a host computer or other radar signal acquisition units. Each radar signal acquisition unit can also be connected to multiple radars via multiple serial ports. Each radar signal acquisition unit includes an extended serial port and a radar serial port. Each radar signal acquisition unit is connected via the extended serial port. The frontmost radar signal acquisition unit is connected to an external host computer via the extended serial port. Each radar signal acquisition unit is connected to a millimeter-wave radar via the radar serial port.

[0006] The working principle and beneficial effects of this invention are as follows:

[0007] This application allows for the cascading of multiple data acquisition units. When a high number of radars is required, it eliminates the need for large data acquisition units; instead, the expansion serial port can be connected to the previous-level data acquisition unit using the solution presented in this application. This allows for the selection of the number of data acquisition units for expansion based on needs, reducing system production costs. If a data acquisition unit fails, it can simply be replaced. Attached Figure Description

[0008] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0009] Figure 1 This is the circuit schematic diagram of the main control module in this application;

[0010] Figure 2 This is the circuit schematic of the voltage regulator module in this application;

[0011] Figure 3 This is the circuit schematic diagram of the alarm module in this application;

[0012] Figure 4 This is the circuit schematic of the crystal oscillator module in this application;

[0013] Figure 5 This is the circuit schematic of the reset fast-shutdown module in this application;

[0014] Figure 6 This is the circuit schematic diagram of the disconnect switch module in this application;

[0015] Figure 7 This is the circuit schematic for debugging the serial port in this application;

[0016] Figure 8 This is the circuit schematic of the storage module in this application;

[0017] Figure 9 The circuit schematic for the five serial ports in this application is shown below.

[0018] Figure 10 This is the circuit schematic diagram of the prompt module in this application;

[0019] Figure 11 This is a system block diagram of this application. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0021] A radar signal acquisition system includes multiple radar signal acquisition units, each with multiple serial ports. Each radar signal acquisition unit can be connected to a host computer or other radar signal acquisition units. Each radar signal acquisition unit can also be connected to multiple radars via multiple serial ports. Each radar signal acquisition unit includes an extended serial port and a radar serial port. Each radar signal acquisition unit is connected via the extended serial port. The frontmost radar signal acquisition unit is connected to an external host computer via the extended serial port. Each radar signal acquisition unit is connected to a millimeter-wave radar via the radar serial port.

[0022] As per the instruction manual Figure 1 ,4 As shown in Figure 5, a radar signal acquisition device includes a main control module. The PD1-OSC_IN and PD1-OSC_OUT pins of the main control module are connected to a crystal oscillator module. The reset pin of the main control module is connected to a reset switch module. The main control module signal is connected to a debugging interface. The radar signal acquisition device also includes a voltage regulator module, a storage module, an isolating switch module, an alarm module, and an interface module. The input terminal of the voltage regulator module is connected to the main control module and an external voltage source. The storage module signal is connected to the main control module. The controlled terminal of the isolating switch module is connected to the PB15 pin of the main control module. The output of the isolating switch module is connected to a connector. The interface module includes a debugging interface and multiple signal transmission interfaces.

[0023] As per the instruction manual Figure 2 As shown, it also includes an alarm module, which consists of a buzzer and a switching transistor Q4. The base of the switching transistor Q4 is connected to the main control module via resistor R22 as the input terminal of the alarm module. The buzzer is connected in series between the collector of the switching transistor Q4 and a 5V voltage source, and the collector of the switching transistor Q4 is grounded. When the main control unit BZ outputs a high potential, the switching transistor Q1 is turned on, and the buzzer is powered on. When the main control unit outputs a low potential, the switching transistor Q1 is turned off, and the buzzer is turned off.

[0024] A diode D1 is connected in parallel to the buzzer, pointing to a high potential. A resistor and capacitor are connected in parallel between the base of the switching transistor Q1 and the power supply ground. Diode D1 serves to drain current. Because the buzzer has a coil structure, it stores a large amount of current during operation. If the current cannot be released after power is cut off, it will damage the transistor Q1 and even the main control chip.

[0025] The power input of the voltage regulator module is connected to an external voltage source VDC, and the signal input of the voltage regulator module is connected to the PA0-WKUP pin of the main control module. The voltage regulator module includes chip U13 and voltage regulator U15. The VIN pin of chip U13 is connected in parallel to the voltage source VDC and the main control module. The voltage source VDC is connected to chip U13 through Zener diode D43, with Zener diode D43 pointing towards chip U13. The main control module is connected to chip U13 through resistors R131 and R130. The SW pin of chip U13 is connected to a 5V voltage source via inductor L1 and resistor R134. The CSP pin of chip U13 is connected to the series connection point of resistor R134 and inductor L1. The CSN pin of chip U13 is connected to the 5V voltage source. The 5V voltage source and the main control module are connected in parallel. Resistors R137 and R140 are connected in series between the power source and ground. The series connection point between resistors R137 and R140 is connected to chip U13. The 5V voltage source is connected to the IN pin of voltage regulator U15. The OUT pin of voltage regulator U15 serves as the 3.3V voltage source. Capacitor C67 is connected between the VIN pin and VC pin of chip U13. Electrolytic capacitor C57, diode D29, and capacitor C66 are connected in parallel between the VIN pin of chip U13 and the power supply ground. Capacitors C3, C72, and electrolytic capacitor C2 are connected in parallel between the 3.3V voltage source and the power supply ground.

[0026] As per the instruction manual Figure 9 As shown, the interface module includes a debug interface J8 and five serial ports J2-J6. The debug interface and serial ports J2-J6 are connected to the main control module for communication. Debug interface J8 is connected to the PA14 and PA13 pins of the main control module; serial port J5 is connected to the PD2 and PC12 pins of the main control module; serial port J3 is connected to the PA10 and PA9 pins of the main control module; serial port J4 is connected to the PA2 and PA3 pins of the main control module; serial port J5 is connected to the PB10 and PB11 pins of the main control module; and serial port J6 is connected to the PC11 and PC10 pins of the main control module.

[0027] Serial port J5, as an extended serial port, can only be connected to a host computer or other data acquisition devices. Serial ports J3-J6 are radar serial ports and can be connected to radar systems. Serial port J5 can only transmit data and cannot receive data. A previous-stage data acquisition device can connect to the next-stage device's J5 via J3-J6.

[0028] As per the instruction manual Figure 6As shown, the isolating switch module includes a transistor Q41, an optocoupler D59, and a MOSFET Q39. The base of transistor Q41, connected to resistor R288, serves as the input terminal of the isolating switch module. The collector of transistor Q41, connected to resistor R38, is connected to the negative terminal of the input terminal of optocoupler D59. The positive terminal of optocoupler D59 is connected to a 3.3V voltage source. The positive terminal of the output terminal of optocoupler D59 serves as the BREAK1+ output. The negative terminal of the output terminal of optocoupler D59 is connected to the gate of MOSFET Q9. The drain of MOSFET Q9 is connected to the optocoupler D59. The positive terminal of the output of optocoupler D59 is connected to diode D20, and diode D20 points to the positive terminal of the output of optocoupler D59. The series connection point between MOSFET Q9 and diode D20 serves as the BREAK2- output, and the source of MOSFET Q9 serves as the BR1_COM output. The output of the isolating switch module is connected to connector CN2. Connector C2 can be connected to the host computer. When a fault occurs, a command will be sent through DO1, which will be transmitted to the host computer through the isolating switch module and then notified to the user through the instrument panel and other devices.

[0029] When an object approaches the car, the entire radar signal acquisition system starts working. At this time, the radar board sends a PWM signal to the serial port via AON3. The serial port then sends the information to the main controller for processing, and then feeds it back to the buzzer, which starts emitting an alarm signal. As the object gets closer to the car body, the frequency of the buzzer alarm will increase.

[0030] The key lies in the centimeter-level distance detection of the high-precision 24-79GHz band millimeter-wave radar, and the integration of the collected radar early warning signals to provide feedback and early warning.

[0031] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A radar signal acquisition system, characterized by, The radar signal collector comprises a plurality of radar signal collectors, each of which has a plurality of serial ports, each of which can be connected to a host computer or connected to other radar signal collectors, and each of which can be connected to a plurality of radars through a plurality of serial ports.

2. A radar signal acquisition system according to claim 1, wherein, Each of the radar signal collectors comprises an expansion serial port and a radar serial port, each of the radar signal collectors is connected through the expansion serial port, and the frontmost radar signal collector is connected to an external host computer through the expansion serial port.

3. The radar signal acquisition system of claim 1, wherein, The radar signal collector comprises a main control module, the PD1-OSC_IN pin and the PD1-OSC_OUT pin of the main control module are connected to a crystal module, the reset pin of the main control module is connected to a reset switch module, and the main control module is connected to a debugging interface; the radar signal collector further comprises a voltage stabilizing module, a storage module, an isolation switch module, an alarm module, and an interface module; the input end of the voltage stabilizing module is connected to the main control module and an external voltage source; the storage module is connected to the main control module; the controlled end of the isolation switch module is connected to the PB15 pin of the main control module; the output of the isolation switch module is connected to a connector; and the interface module comprises a debugging interface and a plurality of signal transmission interfaces.

4. A radar signal acquisition system according to claim 3, wherein, The radar signal collector further comprises an alarm module, which comprises a buzzer and a switching tube Q4; the base of the switching tube Q4 is connected to the main control module as an input end of the alarm module through a resistor R22; the collector of the switching tube Q4 is connected in series with the buzzer between the collector and a 5V voltage source; and the collector of the switching tube Q4 is grounded.

5. A radar signal acquisition system according to claim 4, wherein, The buzzer is connected in parallel with a diode D1, which is directed to a high potential; the base of the switching tube Q1 is connected in parallel with a resistor and a capacitor between the base and the power supply ground.

6. A radar signal acquisition system according to claim 3, wherein, The power supply input of the voltage stabilizing module is connected to an external voltage source VDC; the signal input of the voltage stabilizing module is connected to the PA0-WKUP pin of the main control module; the voltage stabilizing module comprises a chip U13 and a voltage stabilizer U15; the VIN pin of the chip U13 is connected in parallel with the voltage source VDC and the main control module; the voltage source VDC is connected to the chip U13 through a voltage stabilizing tube D43, which is directed to the chip U13; the main control module is connected to the chip U13 through a resistor R131 and a resistor R130; the SW pin of the chip U13 is connected to an inductance L1 and a resistor R134 as a 5V voltage source; the CSP pin of the chip U13 is connected to the series connection point of the resistor R134 and the inductance L1; the CSN of the chip U13 is connected to a 5V voltage source; the 5V voltage source is connected in series with a resistor R137 and a resistor R140 between the power supply ground; the series connection point between the resistor R137 and the resistor R140 is connected to the chip U13; the 5V voltage source is connected to the IN pin of the voltage stabilizer U15; and the OUT pin of the voltage stabilizer U15 is a 3.3V voltage source.

7. A radar signal acquisition system according to claim 6, wherein, The capacitor C67 is connected between the VIN pin and the VC pin of the chip U13, the electrolytic capacitor C57 and the diode D29 and the capacitor C66 connected in parallel are connected between the VIN pin of the chip U13 and the power supply ground, the capacitor C3, the capacitor C72 and the electrolytic capacitor C2 connected in parallel are connected between the 3.3V voltage source and the power supply ground.

8. The radar signal acquisition system of claim 3, wherein, The interface module comprises a debugging interface J8 and five serial ports J2-J6, and the debugging interface and the serial ports J2-J6 are respectively connected with the main control module.

9. A radar signal acquisition system according to claim 8, wherein, The debugging interface J8 is connected with the PA14 and PA13 pins of the main control module, the serial port J5 is connected with the PD2 and PC12 pins of the main control module, the serial port J3 is connected with the PA10 and PA9 pins of the main control module, the serial port J4 is connected with the PA2 and PA3 pins of the main control module, the serial port J5 is connected with the PB10 and PB11 pins of the main control module, and the serial port J6 is connected with the PC11 and PC10 pins of the main control module.

10. A radar signal acquisition system according to claim 9, wherein, The isolating switch module comprises a triode Q41, an optical coupler D59 and a MOS tube Q39, the base of the triode Q41 and the resistor R288 are connected as the input end of the isolating switch module, the collector of the triode Q41 is connected with the negative pole of the input end of the optical coupler D59 through the resistor R38, the positive pole of the optical coupler D59 is connected with the 3.3V voltage source, the positive pole of the output end of the optical coupler D59 is the BREAK1+ output, the negative pole of the output end of the optical coupler D59 is connected with the gate of the MOS tube Q9, the drain of the MOS tube Q9 is connected with the positive pole of the output end of the optical coupler D59 through the diode D20, the diode D20 is directed to the positive pole of the output end of the optical coupler D59, the series connection point of the MOS tube Q9 and the diode D20 is the BREAK2- output, the source of the MOS tube Q9 is the BR1_COM output, and the output of the isolating switch module is connected with the connector CN2.

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