Radar ranging system and device based on FMCW

Abstract

The utility model relates to an FMCW-based radar ranging system and device. The FMCW-based radar ranging system comprises an MCU module, a power capacitive reactance module, a FLASH module, an LPF module, a DCDC module and an expansion interface module. The MCU module is respectively connected with the DCDC module, the LPF module, the expansion interface module, the power supply capacitive reactance module and the FLASH module; wherein the FLASH module is used for backup storage of module data, the MCU module is provided with an LNA channel, an MIXER channel, an IF channel, an ADC channel and an IF module, and the MCU module is used for amplifying an IF signal before sampling, converting the amplified signal into a digital signal through ADC sampling, carrying out Fourier transform, and filtering and comparing through an algorithm to obtain a current ranging value, so that the ranging precision can be effectively improved; the distance measurement requirements of special occasions are met; and high-performance modules such as the MCU module, the power supply capacitive reactance module and the FLASH module are adopted, so that the stable operation of the system is ensured, and the failure rate is reduced.

Description

Technical Field

[0001] This application relates to a live broadcast system, and specifically, to a radar ranging system and device based on FMCW. Background Art

[0002] With the popularization of artificial intelligence, ranging has evolved from traditional manual measurement to current intelligent measurement. The application of microwave radar ranging has been very extensive. Airport and hotel automatic doors are familiar applications of microwave detectors. With the reduction in the price of microwave detectors, their application in automatic lights is also becoming more and more widespread. In the automotive field, microwave detection has been widely used in reverse collision prevention.

[0003] There are many conventional ranging methods, such as ultrasonic ranging and infrared ranging, which have their own advantages and disadvantages in terms of accuracy and usage environment. For some special occasions, such as the height of liquid in an oil tanker, high accuracy and strong anti-interference ability are required, and the existing ranging methods are difficult to meet the ranging requirements. Utility Model Content

[0004] The purpose of this application is to provide a radar ranging system and device based on FMCW to solve the problem that the existing ranging methods are difficult to meet the ranging requirements in special occasions.

[0005] To solve the above problems, this application adopts the following technical solutions to implement:

[0006] The first aspect of this application provides a radar ranging system based on FMCW. The radar ranging system based on FMCW includes: an MCU module, a power supply reactance module, a FLASH module, an LPF module, a DCDC module, and an expansion interface module; the MCU module is respectively connected to the DCDC module, the LPF module, the expansion interface module, the power supply reactance module, and the FLASH module;

[0007] Among them, the FLASH module is used for backup storage of module data. The MCU module is provided with an LNA channel, a MIXER channel, an IF channel, an ADC channel, and an IF module. The MCU module is used to amplify the IF signal before sampling, and convert the amplified signal into a digital signal through ADC sampling for Fourier transform, and filter and compare through an algorithm to obtain the current ranging value.

[0008] Based on FMCW radar ranging technology, through Fourier transform and algorithm processing, it can effectively improve the ranging accuracy and meet the ranging requirements in special occasions. Compared with traditional ranging methods, the FMCW radar ranging system has strong anti-interference ability, can adapt to various complex environments, ensure the accuracy of ranging. At the same time, high-performance modules such as the MCU module, power capacitance module, and FLASH module are adopted to ensure the stable operation of the system and reduce the failure rate.

[0009] Further, the MCU module includes a radar chip and a reset circuit. One end of the radar chip is respectively connected to the DCDC module, the LPF module, the expansion interface module, the power capacitance module, the FLASH module, and one end of the reset circuit, and the other end of the reset circuit is grounded.

[0010] The MCU module has a built-in radar chip, which can process radar signals in real time, reduce the complexity of external circuits, improve signal processing efficiency. The design of the reset circuit can reset the system in a timely manner in case of abnormal situations, ensure the stable operation of the system, reduce the failure rate, and improve measurement reliability.

[0011] Further, the MCU module includes an input / output interface circuit. One end of the input / output interface circuit is connected to the radar chip, and the other end of the input / output interface circuit is grounded.

[0012] The design of the input / output interface circuit can effectively protect the radar chip from external electromagnetic interference, ensure the integrity and stability of the signal. At the same time, the other end of the input / output interface circuit is grounded, which can effectively direct the possible voltage difference and electrostatic discharge risk to the ground, reducing the risk of damage to the radar chip and the system.

[0013] Further, the FMCW-based radar ranging system includes a BOOT circuit. One end of the BOOT circuit is connected to the radar chip, and the other end of the BOOT circuit is grounded.

[0014] By integrating the BOOT circuit, the radar ranging system can achieve a more stable and reliable startup process, ensure that the system can be initialized quickly and accurately after power-on. The design of the BOOT circuit can prevent system startup failures caused by power fluctuations or abnormal situations, improve the reliability and stability of the system. At the same time, the BOOT circuit provides a reference voltage for initializing the radar chip, protects the radar chip from the impact of power fluctuations, and extends the service life of the chip.

[0015] Further, the FMCW-based radar ranging system includes a resonant circuit. One end of the resonant circuit is connected to the radar chip, and the other end of the resonant circuit is grounded.

[0016] The resonant circuit can enhance the signal emitted by the radar chip, improve the quality and intensity of the signal, thereby enhancing the detection performance of the radar system. At the same time, the resonant circuit can optimize the frequency response of the radar chip, enabling the radar system to more effectively process signals in a specific frequency range and improving the selectivity of the system.

[0017] Furthermore, the DCDC module includes a voltage regulator chip and a filter circuit. The voltage regulator chip is respectively connected to the filter circuit and the radar chip, and one end of the filter circuit is grounded.

[0018] By integrating the DCDC module, including a voltage regulator chip and a filter circuit, a stable power supply can be provided for the radar chip, reducing the impact of power fluctuations on the radar chip and ensuring the stable operation of the radar system.

[0019] Furthermore, the model number of the voltage regulator chip is SY98001.

[0020] The SY98001 voltage regulator chip has high stability, can provide a stable voltage for the radar chip, ensuring that the radar chip can obtain a stable operating voltage under different power conditions. At the same time, it has the characteristics of high efficiency, can effectively convert power energy, reduce energy loss, and improve the overall efficiency of the system.

[0021] Furthermore, the MCU module includes an LED light. One end of the LED light is grounded, and the other end of the LED light is connected to the radar chip.

[0022] By integrating the LED light, the MCU module can monitor the working state of the radar chip in real time, and reflect the operation of the radar chip through the lighting or flashing of the LED light. By observing the state of the LED light to judge whether the radar chip is working properly, the fault diagnosis process is simplified.

[0023] This application also provides a radar ranging device based on FMCW. The radar ranging device based on FMCW includes the above-mentioned radar ranging system based on FMCW.

[0024] Compared with the prior art, the beneficial effects of this application are as follows: Since the FLASH module is used for backup storage of module data, the MCU module is provided with an LNA channel, a MIXER channel, an IF channel, an ADC channel, and an IF module. The MCU module is used to amplify the IF signal before sampling, and convert the amplified signal into a digital signal through ADC sampling for Fourier transform, and filter and compare through algorithms to obtain the current ranging value, effectively improving the ranging accuracy and meeting the ranging requirements in special occasions. By integrating high-performance modules such as the MCU module, the power capacitance module, and the FLASH module, the stable operation of the system is ensured, and the risk of failure rate is reduced. Description of the Drawings

[0025] Figure 1 This is a system diagram of a radar ranging system based on FMCW provided by an embodiment of the present application;

[0026] Figure 2 This is a schematic diagram of a radar ranging system based on FMCW provided by an embodiment of the present application;

[0027] Figure 3 This is a schematic diagram of an MCU module provided by an embodiment of the present application;

[0028] Figure 4 This is a schematic diagram of an input / output interface circuit provided by an embodiment of the present application;

[0029] Figure 5 This is a schematic diagram of a power capacitance reactance module provided by an embodiment of the present application;

[0030] Figure 6 This is a schematic diagram of a FLASH module provided by an embodiment of the present application;

[0031] Figure 7 This is a schematic diagram of a BOOT circuit provided by an embodiment of the present application;

[0032] Figure 8 This is a schematic diagram of a resonant circuit provided by an embodiment of the present application;

[0033] Figure 9 This is a schematic diagram of an extended interface module provided by an embodiment of the present application;

[0034] Figure 10 This is a schematic diagram of a FLASH module provided by an embodiment of the present application; and

[0035] Figure 11 This is a schematic diagram of a DCDC module provided by an embodiment of the present application.

[0036] Description of the Reference Numerals:

[0037] 100, MCU module; 110, radar chip; 120, reset circuit; 130, input / output interface circuit; 140, LED lamp; 200, power capacitance reactance module; 300, FLASH module; 400, LPF module; 500, DCDC module; 510, voltage regulator chip; 520, filter circuit; 600, extended interface module; 700, BOOT circuit; 800, resonant circuit. Detailed Embodiments

[0038] The following describes in detail the specific embodiments of the present application with reference to the accompanying drawings.

[0039] It should be noted that, without conflict, the embodiments in this application and the technical features in the embodiments can be combined with each other. The detailed description in the specific implementation manners should be understood as an explanatory illustration of the purpose of this application and should not be regarded as an improper restriction on this application.

[0040] It should be understood that the orientation or positional relationship is based on the orientation or positional relationship shown in the drawings. These orientation terms are only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation on this application.

[0041] With the popularization of artificial intelligence, ranging has evolved from traditional manual measurement to current intelligent measurement. There are many ways of ranging, such as common ultrasonic ranging, infrared ranging, etc. Each has its own advantages and disadvantages in terms of accuracy and usage environment. For some special occasions, such as the height of the liquid in an oil tanker, high accuracy and strong anti-interference ability are required. Therefore, frequency-modulated continuous wave (FMCW) millimeter-wave radar ranging is a good way. Millimeter waves refer to electromagnetic waves with wavelengths between 1 millimeter and 10 millimeters, corresponding to a frequency range of approximately 30 GHz to 300 GHz. This frequency band has high resolution and short wavelengths, and is suitable for high-precision distance and speed measurement. The FMCW radar emits a continuous wave signal whose frequency changes linearly with time, and then receives the reflected signal. By comparing the frequency difference (i.e., beat frequency) between the transmitted signal and the received signal, the distance and speed of the target can be calculated.

[0042] Frequency-modulated continuous wave (FMCW) millimeter-wave radar ranging has the following advantages:

[0043] (1) High resolution: Due to the short wavelength of millimeter waves, the FMCW radar can achieve high range resolution and angular resolution, which is very important for accurately detecting and identifying targets.

[0044] (2) Strong anti-interference ability: The FMCW radar has strong anti-interference ability against stray signals and multipath effects because it can distinguish different reflected signals through frequency modulation.

[0045] (3) Low power consumption: Compared with traditional pulsed radars, the FMCW radar usually has lower power consumption, which makes it more suitable for battery-powered mobile devices.

[0046] (4) High integration: With the development of semiconductor technology, the integration of FMCW millimeter-wave radars is getting higher and higher, the volume is getting smaller and smaller, and the cost is gradually decreasing, which promotes its wide application in the consumer electronics and automotive industries.

[0047] In view of this, the embodiments of this application provide a radar ranging system based on FMCW, asFigure 1 and Figure 2 as shown Figure 1 FIG. 0 is a system diagram of a radar ranging system based on FMCW provided by an embodiment of the present application. Figure 2 FIG. 0 is a schematic diagram of a radar ranging system based on FMCW provided by an embodiment of the present application. The radar ranging system provided by the embodiment of the present application takes a highly integrated radar dedicated chip as the core, and performs transmission, reception, filtering, amplification, analog-to-digital conversion, FFT transformation, etc. of frequency-modulated continuous waves. With the cooperation of a high-precision calculation method, secondary filtering and point selection of data are completed, and finally the measured distance data with an accuracy of millimeters or less is obtained.

[0048] In the MCU module, the receiving channel includes an LNA, a MIXER, an IF, and an ADC. The IF module consists of a high-pass filter and a dynamic VG with a 2dB gain step, and further amplifies the IF signal before sampling. The amplified signal is sampled by the ADC, converted into a digital signal for FFT (Fourier transform), and finally filtered and compared through an internal algorithm to obtain the current distance value. For power supply, a DCDC module is used, which has a power supply with high stability. Since the radio frequency characteristics of the module require the power supply ripple of the module, the DCDC is used to reduce the power supply noise and power supply ripple. For the FLASH module, it mainly completes the storage of module data and the OTA function. Since the scenarios where the module is used are generally relatively special and are installed in positions that are not easy to disassemble, in order to prevent the module firmware from being damaged and unable to run due to various sudden abnormal situations during the OTA process, a FLASH is added to make a backup of the firmware and cooperate with a reliable OTA upgrade method to ensure the stability of the module. The expansion interface module provides a J3 programming port for convenient online debugging and programming of the module. The expansion interface provides a J1 interface serial port and an SPI port for convenient data transmission with external devices, facilitating the connection of the module with different devices and adapting to external devices, making the application field of the module wider.

[0049] Figure 3 FIG. 14 is a schematic diagram of an MCU module provided by an embodiment of the present application. Figure 4 FIG. 16 is a schematic diagram of an input / output interface circuit provided by an embodiment of the present application. Figure 5 FIG. 18 is a schematic diagram of a power supply capacitive reactance module provided by an embodiment of the present application. Figure 6 FIG. 20 is a schematic diagram of a FLASH module provided by an embodiment of the present application. Figure 9 FIG. 22 is a schematic diagram of an expansion interface module provided by an embodiment of the present application. Figure 10 FIG. 24 is a schematic diagram of a FLASH module provided by an embodiment of the present application, and FIG. 11 is a schematic diagram of a DCDC module provided by an embodiment of the present application. As Figures 1 - 11As shown in the figure, the embodiment of the present application provides a radar ranging system based on FMCW. The radar ranging system based on FMCW includes: an MCU module 100, a power supply capacitive reactance module 200, a FLASH module 300, an LPF module 400, a DCDC module 500, and an extended interface module 600; the MCU module 100 is respectively connected to the DCDC module 500, the LPF module 400, the extended interface module 600, the power supply capacitive reactance module 200, and the FLASH module 300; wherein, the FLASH module 300 is used for backup storage of module data, and the MCU module 100 is provided with an LNA channel, a MIXER channel, an IF channel, an ADC channel, and an IF module. The MCU module 100 is used to amplify the IF signal before sampling, and convert the amplified signal into a digital signal through ADC sampling for Fourier transform, and filter and compare through an algorithm to obtain the current ranging value.

[0050] Specifically, first select a suitable FMCW radar sensor according to requirements and ensure its compatibility with other modules. Connect the FMCW radar sensor to the MCU module 100, and then connect the MCU module 100 to the DCDC module 500, the LPF module 400, the extended interface module 600, the power supply capacitive reactance module 200, and the FLASH module 300 respectively, ensuring that all connections are correct to ensure the normal operation of the system.

[0051] Set up an LNA channel, a MIXER channel, an IF channel, an ADC channel, and an IF module in the MCU module 100 to sample and convert the amplified IF signal. At the same time, configure the FLASH module 300 to backup and store module data. After the system is started, the FMCW radar sensor starts to work. The sensor amplifies the collected signal through the LNA channel, then processes it through the MIXER channel and the IF channel, and finally samples and converts it into a digital signal through the ADC channel. The converted digital signal is input into the MCU module 100, and the signal is processed using Fourier transform, and filtered and compared through an algorithm to obtain the current ranging value. The processed ranging value is stored in the FLASH module 300 for subsequent query and analysis. At the same time, the ranging value is output through the extended interface module 600 for use by users or other systems.

[0052] Based on FMCW radar ranging technology, through Fourier transform and algorithm processing, the ranging accuracy can be effectively improved to meet the ranging requirements in special occasions. Compared with traditional ranging methods, the FMCW radar ranging system has strong anti-interference ability, can adapt to various complex environments, and ensure the accuracy of ranging. At the same time, high-performance modules such as the MCU module, the power supply capacitive reactance module, and the FLASH module are used to ensure the stable operation of the system and reduce the failure rate.

[0053] In some embodiments, the MCU module 100 includes a radar chip 110 and a reset circuit 120. One end of the radar chip 110 is respectively connected to the DCDC module 500, the LPF module 400, the expansion interface module 600, the power capacitance module 200, the FLASH module 300, and one end of the reset circuit 120, and the other end of the reset circuit 120 is grounded.

[0054] Specifically, select a suitable radar chip 110 and connect the radar chip 110 to the DCDC module 500, the LPF module 400, the expansion interface module 600, the power capacitance module 200, the FLASH module 300, and the reset circuit 120. Ensure that one end of the radar chip 110 is respectively connected to these modules, while the other end of the reset circuit 120 is grounded.

[0055] After the radar chip 110 starts to work, the radar chip 110 processes the collected signals through the DCDC module 500, the LPF module 400, and the expansion interface module 600, and then inputs the processed signals into the MCU module 100. The signals input into the MCU module 100 are processed, including algorithm calculation and numerical conversion, etc. The MCU module 100 processes the signals to obtain accurate ranging values, stores the processed ranging values in the FLASH module 300 for subsequent query and analysis. At the same time, the ranging values are output through the expansion interface module 600 for use by users or other systems. The MCU module 100 has a built-in radar chip 110, which can process radar signals in real time, reduce the complexity of external circuits, improve signal processing efficiency. The design of the reset circuit 120 can reset the system in a timely manner in case of abnormal situations, ensure the stable operation of the system, reduce the failure rate, and improve measurement reliability.

[0056] In some embodiments, the MCU module 100 includes an input / output interface circuit 130. One end of the input / output interface circuit 130 is connected to the radar chip 110, and the other end of the input / output interface circuit 130 is grounded.

[0057] Specifically, the radar chip 110 is physically connected to the input / output interface circuit 130 to ensure that one end of the input / output interface circuit 130 is connected to the radar chip 110 and the other end is grounded. Configure relevant parameters in the radar chip 110 to meet the ranging requirements of special occasions, and conduct system debugging to ensure normal connection and communication between the radar chip 110 and the input / output interface circuit 130. After passing through the input / output interface circuit 130, the MCU module 100 processes the input signals, including algorithm calculation, numerical conversion, etc., and the MCU module 100 processes the signals to obtain accurate ranging values.

[0058] The design of the input / output interface circuit 130 can effectively protect the radar chip 110 from external electromagnetic interference, ensuring signal integrity and stability. At the same time, the other end of the input / output interface circuit 130 is grounded, which can effectively direct the possible voltage difference and electrostatic discharge risks to the ground, reducing the risk of damage to the radar chip 110 and the system.

[0059] Figure 7 The figure shows a schematic diagram of a BOOT circuit provided by an embodiment of the present application. As Figure 7 shown, in some embodiments, the FMCW-based radar ranging system includes a BOOT circuit 700. One end of the BOOT circuit 700 is connected to the radar chip 110, and the other end of the BOOT circuit 700 is grounded.

[0060] Specifically, the radar chip 110 is physically connected to the BOOT circuit 700. One end of the BOOT circuit 700 is connected to the radar chip 110, and the other end is grounded. Configure relevant parameters in the radar chip 110 and the BOOT circuit 700 to meet the ranging requirements in special occasions, ensuring its compatibility and cooperative work with the radar chip 110.

[0061] By integrating the BOOT circuit 700, the radar ranging system can achieve a more stable and reliable startup process, ensuring that the system can be initialized quickly and accurately after power-on. The design of the BOOT circuit 700 can prevent system startup failures caused by power fluctuations or abnormal conditions, improving the reliability and stability of the system. At the same time, the BOOT circuit 700 provides an initialization reference voltage for the radar chip 110, protecting the radar chip 110 from the impact of power fluctuations and extending the service life of the chip.

[0062] Figure 8 The figure shows a schematic diagram of a resonant circuit provided by an embodiment of the present application. As Figure 8 shown, in some embodiments, the FMCW-based radar ranging system includes a resonant circuit 800. One end of the resonant circuit 800 is connected to the radar chip 110, and the other end of the resonant circuit 800 is grounded.

[0063] Specifically, the radar chip 110 is physically connected to the resonant circuit 800, ensuring that one end of the resonant circuit 800 is connected to the radar chip 110 and the other end is grounded. Configure the resonant circuit 800 to ensure its compatibility and cooperative work with the radar chip 110, ensuring normal connection and communication between the radar chip 110 and the resonant circuit 800.

[0064] The resonant circuit 800 can enhance the signal emitted by the radar chip 110, improve the quality and intensity of the signal, thereby enhancing the detection performance of the system. At the same time, the resonant circuit 800 can optimize the frequency response of the radar chip 110, enabling the system to more effectively process signals in a specific frequency range and improving the selectivity of the system.

[0065] In some embodiments, the DCDC module 500 includes a voltage regulator chip 510 and a filter circuit 520. The voltage regulator chip 510 is connected to the filter circuit 520 and the radar chip 110 respectively, and one end of the filter circuit 520 is grounded.

[0066] Specifically, physically connect the voltage regulator chip 510 to the filter circuit 520, connect the other end of the voltage regulator chip 510 to the radar chip 110, and ground one end of the filter circuit 520. The filter circuit 520 can effectively filter out noise and ripple and provide a stable power supply to the radar chip 110. Before the system works, perform debugging to ensure the normal connection and communication between the voltage regulator chip 510 and the filter circuit 520, as well as the normal operation of the radar chip 110. In particular, the model of the voltage regulator chip 510 is SY98001.

[0067] Through the voltage regulator chip 510 and the filter circuit 520, a stable power supply can be provided to the radar chip 110, reducing the impact of power fluctuations on the radar chip 110 and ensuring the stable operation of the radar system.

[0068] It should be noted that the SY98001 voltage regulator chip has high stability, can provide a stable voltage to the radar chip 110, ensuring that the radar chip 110 can obtain a stable operating voltage under different power supply conditions. At the same time, it has the characteristics of high efficiency, can effectively convert power energy, reduce energy loss, and improve the overall efficiency of the system.

[0069] In some embodiments, the MCU module 100 includes an LED lamp 140. One end of the LED lamp 140 is grounded, and the other end of the LED lamp 140 is connected to the radar chip 110.

[0070] Specifically, one end of the LED lamp 140 is grounded to ensure electrical safety and reduce noise. The other end of the LED lamp 140 is connected to the radar chip 110. According to the system requirements, configure parameters such as the brightness and blinking mode of the LED lamp 140 to ensure that it can correctly identify and process the signal of the LED lamp 140.

[0071] By integrating the LED lamp 140, the MCU module 100 can monitor the working state of the radar chip 110 in real time, and reflect the operation of the radar chip 110 through the lighting or flashing of the LED lamp 140. By observing the state of the LED lamp 140 to determine whether the radar chip 110 is working properly, the fault diagnosis process is simplified.

[0072] The embodiment of the present application also provides a radar ranging device based on FMCW. The radar ranging device based on FMCW includes the radar ranging system based on FMCW in any one of the above.

[0073] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, for those skilled in the art, it is still possible to modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions required to be protected by the present application.

Claims

1. A radar ranging system based on FMCW, characterized in that: The FMCW-based radar ranging system includes: an MCU module, a power supply capacitance module, a FLASH module, an LPF module, a DCDC module and an expansion interface module; the MCU module is respectively connected to the DCDC module, the LPF module, the expansion interface module, the power supply capacitance module and the FLASH module; Among them, the FLASH module is used for backup storage of module data, and the MCU module is provided with an LNA channel, a MIXER channel, an IF channel, an ADC channel and an IF module. The MCU module is used to amplify the IF signal before sampling, and convert the amplified signal into a digital signal through ADC sampling for Fourier transform, and filter and compare through the algorithm to obtain the current ranging value.

2. The FMCW-based radar ranging system according to claim 1, characterized in that: The MCU module includes a radar chip and a reset circuit. The radar chip is respectively connected to the DCDC module, the LPF module, the expansion interface module, the power supply capacitance module, the FLASH module and one end of the reset circuit, and the other end of the reset circuit is grounded.

3. The FMCW-based radar ranging system according to claim 2, characterized in that: The MCU module includes an input-output interface circuit, one end of the input-output interface circuit is connected to the radar chip, and the other end of the input-output interface circuit is grounded.

4. The FMCW-based radar ranging system according to claim 2, characterized in that: The FMCW-based radar ranging system includes a BOOT circuit, one end of the BOOT circuit is connected to the radar chip, and the other end of the BOOT circuit is grounded.

5. The FMCW-based radar ranging system according to claim 2, characterized in that: The FMCW-based radar ranging system includes a resonant circuit, one end of the resonant circuit is connected to the radar chip, and the other end of the resonant circuit is grounded.

6. The FMCW-based radar ranging system according to claim 2, characterized in that: The DCDC module includes a voltage regulator chip and a filter circuit. The voltage regulator chip is connected to the filter circuit and the radar chip respectively, and one end of the filter circuit is grounded.

7. The FMCW-based radar ranging system according to claim 6, characterized in that: The model of the voltage regulator chip is SY98001.

8. The FMCW-based radar ranging system according to claim 2, characterized in that: The MCU module includes an LED lamp, one end of which is grounded, and the other end of which is connected to the radar chip.

9. A radar ranging device based on FMCW, characterized in that: The FMCW-based radar ranging device comprises the FMCW-based radar ranging system according to any one of claims 1-8.

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