Radar ranging method based on Doppler principle

Abstract

The invention discloses a radar ranging method based on the Doppler principle. The radar ranging method comprises the following steps that a radar transmits electromagnetic waves and then receives electromagnetic waves; the Doppler frequency is obtained according to a formula, and whether or not a measured object is close to or far away from the radar according to the size of the transmitted electromagnetic waves and the size of the received electromagnetic waves; the relation between the Doppler frequency and the relative velocity is obtained according to multiple times of testing and measurement; the approximate distance between the radar and a transmitting object is calculated according to the delay time of transmitting the electromagnetic waves and the delay time of receiving the electromagnetic waves; and the time needed when the measured object and the radar are located at the same position is calculated according to a velocity and displacement formula, and a user is reminded toperform a correct operation according to the time. The relative velocity and the distance between the measured object and the radar and the time needed when the measured object runs into the vehicle-mounted radar are calculated by means of the Doppler principle, the condition that two vehicles collide is avoided, the ranging mode is simple and convenient to operate, the radar terminal quickly calculates and processes data, the driver can quickly perform the correct driving operation, and therefore the driving safety is improved.

Description

technical field [0001] The invention relates to the field of radar ranging methods, in particular to a radar ranging method based on the Doppler principle. Background technique [0002] Safety is the most basic and important performance of a car. The safety protection of occupants is the eternal theme pursued by the development of cars. With the development of electronic technology, many intelligent technologies are widely used in car safety devices, such as radar ranging Anti-collision control system is one of the hotspots in the field of international automobile safety research. [0003] The anti-collision radar system is assembled on the front, side or rear of the vehicle to complete front-view anti-collision (anti-rear collision), side-view anti-collision (anti-collision between two vehicles when changing lanes) and rear-view anti-collision (anti-collision when reversing) Collision with obstacles behind the car) and other functions with different focuses. The anti-coll...

AI Technical Summary

Problems solved by technology

[0005] (1) The distance measurement method and process are relatively cumbersome and require a long calculation time and calculation time of the system. For vehicle-mounted radar, this reduces the immediacy of distance measurement and delays the distance measurement results, which is easy to cause drivers Misjudgment and misoperation of driving may occur, which may easily cause a collision accident;

[0006] (2) The existing radar ranging method can only simply measure the distance between the radar and the measured object, and cannot provide a better solution based on speed and time, so that the driver cannot make the most accurate driving operation

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