Work method of anti-jamming reversing radar

Abstract

The invention discloses a work method of an anti-jamming reversing radar, comprising the following steps of: firstly, presetting the distance of two numerical values and using the distance as a comparison variable; secondly, detecting the distance of an obstacle by using the reversing radar for multiple times and reading data acquired by the final three times of detection for analysis; thirdly, comparing the difference of data obtained by the last two times of detection with one of the preset comparison variables, determining that the detected data values are valid and outputting the data obtained by the last time of detection if the difference is not more than the comparison variable, and otherwise, turning into the fourth step; fourthly, comparing data obtained by the final three times of detection and turning into the fifth step if the data obtained by the intermediate detection is in the middle range of the data obtained by three times of detection; fifthly, in the data obtained by the final three times of detection, respectively subtracting the data obtained by the last time of detection by the data obtained by the later time of detection and calculating absolution values of two groups of data; and sixthly, comparing the numerical value obtained by subtracting the absolute values of two groups of data with the other comparison variable. The invention can be used for eliminating various random jammings and improving the obstacle detection reliability of the reversing radar.

Description

technical field [0001] The invention relates to a working method of an anti-jamming reversing radar, in particular to a working method for improving the anti-jamming ability when detecting the distance of obstacles in the process of reversing and parking. Background technique [0002] "Parking" is a problem that every driver must face. Sometimes the planning of the parking space is relatively narrow. In this case, the driver must have rich experience and skilled skills to smoothly put the car into the parking space. When the driver's technology is not so skilled, it is difficult to avoid unexpected collisions and collisions. In order to help drivers solve the difficulties of reversing and parking, a reversing radar has appeared on the market. The reversing radar is also called parking assistance system. The principle of ultrasonic transmission and reception, when the driver is reversing, the reversing radar is activated. Under the control of the controller, the probe on the...

AI Technical Summary

Problems solved by technology

[0004] However, in the existing reversing and parking assist devices, when the ultrasonic sensor receives the ultrasonic wave, it converts the acoustic signal into an electrical signal. This electrical signal is very weak and needs to be amplified and compared in multiple stages, and finally input to the MCU.

In this process, there are two important types of interference that will affect the system's detection of obstacles. One is the input of ultrasonic waves from the surrounding environment of non-real obstacles, and the other is the interference of electrical signals from the surrounding environment. These two types of interference have one thing in common. That is, randomness, which will cause random interference to the reversing radar and affect the reliability of the reversing radar for obstacle detection

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