Synthetic aperture radar three-dimensional imaging device based on single-chip microcomputer control

Abstract

The utility model discloses a synthetic aperture radar three-dimensional imaging device based on single-chip microcomputer control, which comprises a radar sensor AWR1843, a DCA1000 radar data acquisition board, an stm32f030f4p6 single-chip microcomputer, a transmitting antenna and a receiving antenna, the transmitting antenna and the receiving antenna are electrically connected with the radar sensor AWR1843, the transmitting antenna and the receiving antenna are installed on an X-Y two-dimensional mobile platform, the X-Y two-dimensional mobile platform is electrically connected with the stm32f030f4p6 single-chip microcomputer, and the stm32f030f4p6 single-chip microcomputer is electrically connected with the transmitting antenna and the receiving antenna. The X-Y two-dimensional mobile platform is horizontally arranged, and the X-Y two-dimensional mobile platform is controlled by the single-chip microcomputer; the single-chip microcomputer is connected with the radar sensor AWR1843. The radar sensor AWR1843 and the single-chip microcomputer are both in communication connection with the computer. The system further comprises a radio frequency signal generator, and the radio frequency signal generator is electrically connected with the radar sensor AWR1843. A processing module used for processing signals of the radar sensor AWR1843 and an image generation module are solidified in the computer. The system can work all weather and all day long, can carry out high-resolution imaging at a long distance, and is very suitable for large-range monitoring and reconnaissance.

Description

TECHNICAL FIELD

[0001] The utility model relates to radar technical field especially relates to a synthetic aperture radar three -dimensional imaging device based on singlechip control. BACKGROUND

[0002] The existing three -dimensional imaging usually adopts optical imaging, needs suitable illumination environment, cannot work all -weather, and cannot work in the environment such as fog.

[0003] Synthetic aperture radar (Synthetic Aperture Radar, SAR) is also called synthetic aperture radar, which is a radar that uses the relative motion of radar and target to synthesize a larger equivalent antenna aperture with data processing method.

[0004] AWR1843 device is an integrated single-chip FMCW radar sensor capable of operating in the 76 to 81GHz band. The device is built using TI's low-power 45nm RFCMOS process and achieves excellent integration in a very small package. AWR1843 is an ideal solution for low-power, self-monitoring, ultra-precise radar systems in the automotive field. UTILITY MODEL CONTENT

[0005] Based on the above defects and prior art, the utility model provides a synthetic aperture radar three -dimensional imaging device based on singlechip control, can all -weather, all -time work, and can carry out high resolution imaging at long distance, very suitable for large -scale monitoring and reconnaissance.

[0006] To achieve the above object, the utility model adopts the following technical scheme:

[0007] The synthetic aperture radar three -dimensional imaging device based on singlechip control, including radar sensor AWR1843, DCA1000 radar data acquisition board, stm32f030f4p6 singlechip, transmitting antenna and receiving antenna, transmitting antenna, receiving antenna all are connected with radar sensor AWR1843, radar sensor AWR1843 connects DCA1000 radar data acquisition board, DCA1000 radar data acquisition board connects computer, transmitting antenna, receiving antenna are installed on X-Y two -dimensional mobile platform, X-Y two -dimensional mobile platform is horizontally arranged, and X-Y two -dimensional mobile platform is controlled to stm32f030f4p6 singlechip;

[0008] The stm32f030f4p6 singlechip is connected with radar sensor AWR1843, and the radar sensor AWR1843 and the stm32f030f4p6 singlechip are connected with the computer in communication;

[0009] Also include a radio frequency signal generator, the radio frequency signal generator is connected with radar sensor AWR1843 electricity connection;

[0010] The computer is solidified with processing module for processing radar sensor AWR1843 signal and image generation module.

[0011] Preferably, the receiving antenna is connected to a low-noise radio frequency amplifier, the low-noise radio frequency amplifier is connected to a band-pass filter, the band-pass filter is connected to a voltage-controlled attenuator, and the voltage-controlled attenuator is connected to a radar sensor AWR1843.

[0012] Preferably, the radar sensor AWR1843 is connected to a radio frequency power amplifier, and the radio frequency power amplifier is connected to a transmitting antenna.

[0013] Further, the radio frequency signal generator is connected to the radar sensor AWR1843 through a digital control amplifier, and the digital control amplifier is controlled by an stm32f030f4p6 single-chip microcomputer.

[0014] Preferably, the X-Y two-dimensional moving platform is driven by a stepping motor, and the stm32f030f4p6 single-chip microcomputer is connected to the stepping motor through a stepping motor driver.

[0015] Further, the transmitting antenna, the receiving antenna and the X-Y two-dimensional moving platform are respectively provided with a holder.

[0016] The utility model discloses a stm32f030f4p6 single-chip microcomputer controls the transmitting antenna and the receiving antenna that are placed on the X-Y two-dimensional moving platform to move relative to the target object, transmits and receives SAR radar wave through radar sensor AWR1843 and transmits data to the computer, can carry out three-dimensional imaging through the processing software in the computer.

[0017] The utility model can work all-weather and all-day, is not limited by weather condition and light, and can still normally image even in the night or under the bad weather condition.

[0018] The SAR radar wave of the utility model can penetrate vegetation, cloud layer and even part of building surface layer, and obtain hidden target information.

[0019] The utility model can carry out high-resolution imaging at long distance, and is very suitable for large-scale monitoring and reconnaissance.

[0020] The utility model expands the capacity of single antenna to a " virtual multi-antenna array", and thus realizes high-resolution imaging. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1This is the electrical schematic diagram of Example 1.

[0022] Figure 2 This is the electrical schematic diagram of Example 2. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with the accompanying drawings.

[0024] Example 1

[0025] This embodiment discloses a synthetic aperture radar three-dimensional imaging device based on single-chip microcomputer control, specifically as follows: Figure 1 As shown, the system includes an AWR1843 radar sensor, a DCA1000 radar data acquisition board, an STM32F030F4P6 microcontroller, a transmitting antenna, and a receiving antenna. Both the transmitting and receiving antennas are electrically connected to the AWR1843 radar sensor, which is in turn electrically connected to the DCA1000 radar data acquisition board. The DCA1000 radar data acquisition board is connected to a computer. The transmitting and receiving antennas are mounted on an XY two-dimensional mobile platform, which is horizontally arranged and controlled by the STM32F030F4P6 microcontroller. Both the AWR1843 radar sensor and the STM32F030F4P6 microcontroller are communicatively connected to the computer. The computer contains a signal processing module and an image generation module for processing signals from the AWR1843 radar sensor.

[0026] The receiving antenna is connected to a low-noise RF amplifier, which is connected to a bandpass filter. The bandpass filter is connected to a radar sensor AWR1843. The RF signal generator is electrically connected to the radar sensor AWR1843, which is connected to an RF power amplifier. The RF power amplifier is connected to the transmitting antenna.

[0027] The XY 2D mobile platform is driven by a stepper motor, and the STM32F030F4P6 microcontroller is connected to the stepper motor via a stepper motor driver. A gimbal is installed between the transmitting antenna, the receiving antenna, and the XY 2D mobile platform.

[0028] The computer controls the microcontroller through the communication module and receives data from the AWR1843 radar sensor in a timely manner, ensuring the real-time nature of the data and determining the positions of the transmitting and receiving antennas.

[0029] The radio frequency signal generated by the radio frequency signal generator is modulated into SAR radar waves by the radar sensor AWR1843. After being amplified by the radio frequency power amplifier, it is transmitted into space through a moving transmitting antenna. At the same time, the moving receiving antenna receives the SAR radar waves reflected by the target. After being amplified by a low-noise radio frequency amplifier and filtered by a bandpass filter, the signals are input to the radar sensor AWR1843. The radar sensor AWR1843 processes the received SAR radar waves and transmits them to the computer through the DCA1000 radar data acquisition board. The computer then uses its built-in processing module and image generation module to form a three-dimensional image.

[0030] The STM32F030 F4P6 microcontroller has the necessary serial communication and pin PWM output functions, and the chip is inexpensive, making it particularly suitable for motor control. The STM32F030 F4P6 can output PWM signals to the stepper motor driver to control the stepper motor, thereby realizing the two-dimensional translation of the XY two-dimensional moving platform and driving the transmitting and receiving antennas to move.

[0031] The STM32F030F4P6 microcontroller receives computer commands through the communication module to control the movement of the XY two-dimensional mobile platform, and sends parameters such as the movement distance and time to the computer via the communication module.

[0032] This embodiment is equipped with a gimbal, which allows adjustment of the direction of the transmitting and receiving antennas.

[0033] Example 2

[0034] like Figure 2 As shown, based on Example 1, this example adds a voltage-controlled attenuator and a digitally controlled amplifier. A bandpass filter is connected to the voltage-controlled attenuator, which is connected to the radar sensor AWR1843. The voltage-controlled attenuator controls the signal level to conform to the input specifications of the radar sensor AWR1843.

[0035] The radio frequency signal generator is connected to the digitally controlled amplifier, which is connected to the radar sensor AWR1843. The digitally controlled amplifier is controlled by the STM32F030F4P6 microcontroller, and the signal level is controlled by the voltage-controlled attenuator to meet the input specifications of the radar sensor AWR1843.

[0036] The other parts of this embodiment are the same as those in Embodiment 1, so they will not be described again.

[0037] Of course, there may be other embodiments of this utility model. Without departing from the spirit and essence of this utility model, those skilled in the art can make various corresponding changes and modifications based on this utility model, but these corresponding changes and modifications should all fall within the protection scope of the appended claims of this utility model.

Claims

1. A synthetic aperture radar three-dimensional imaging device based on single-chip microcomputer control, characterized in that: The system includes an AWR1843 radar sensor, a DCA1000 radar data acquisition board, an STM32F030F4P6 microcontroller, a transmitting antenna, and a receiving antenna. The transmitting and receiving antennas are electrically connected to the AWR1843 radar sensor. The AWR1843 radar sensor is connected to the DCA1000 radar data acquisition board, which is connected to a computer. The transmitting and receiving antennas are mounted on an XY two-dimensional mobile platform, which is horizontally arranged and controlled by the STM32F030F4P6 microcontroller. The STM32F030F4P6 microcontroller is connected to the AWR1843 radar sensor, and both the AWR1843 radar sensor and the STM32F030F4P6 microcontroller are connected to the computer for communication. It also includes a radio frequency signal generator, which is electrically connected to the radar sensor AWR1843; The computer contains a processing module for processing signals from the AWR1843 radar sensor and an image generation module.

2. The synthetic aperture radar three-dimensional imaging device based on single-chip microcomputer control according to claim 1, characterized in that: The receiving antenna is connected to a low-noise RF amplifier, the low-noise RF amplifier is connected to a bandpass filter, the bandpass filter is connected to a voltage-controlled attenuator, and the voltage-controlled attenuator is connected to an AWR1843 radar sensor.

3. The synthetic aperture radar three-dimensional imaging device based on single-chip microcomputer control according to claim 1, characterized in that: The radar sensor AWR1843 is connected to an RF power amplifier, which is in turn connected to a transmitting antenna.

4. The synthetic aperture radar three-dimensional imaging device based on single-chip microcomputer control according to claim 1, characterized in that: The radio frequency signal generator is connected to the radar sensor AWR1843 via a digitally controlled amplifier, which is controlled by an STM32F030F4P6 microcontroller.

5. The synthetic aperture radar three-dimensional imaging device based on single-chip microcomputer control according to any one of claims 1-4, characterized in that: The XY two-dimensional mobile platform is driven by a stepper motor, and the STM32F030F4P6 microcontroller is connected to the stepper motor through a stepper motor driver.

6. The synthetic aperture radar three-dimensional imaging device based on single-chip microcomputer control according to claim 1, characterized in that: A gimbal is installed between the transmitting antenna, the receiving antenna, and the XY two-dimensional mobile platform.

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