Distance detection method and device for preventing ultrasonic aftershocks
A technology of distance detection and ultrasonic waves, applied in the field of distance detection methods and devices for preventing ultrasonic aftershocks, can solve the problems of sound waves, vibrations, vibrations, etc., and achieve the effect of improving accuracy
Active Publication Date: 2022-07-08
AUDIOWELL ELECTRONICS GUANGDONG
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Problems solved by technology
[0004] However, the currently commonly used ultrasonic radar has the following technical problems: when the ultrasonic radar generates ultrasonic waves, it needs to vibrate itself, thus generating unnecessary sound waves. At the same time, other sensors or radars on the vehicle may also vibrate due to ultrasonic waves, resulting in unnecessary sound waves
Ultrasonic radar is easy to identify unnecessary sound waves as reply waveform signals, which leads to identification errors and reduces the accuracy of detection.
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[0045] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.
[0046] The currently commonly used ultrasonic radar has the following technical problems: when the ultrasonic radar generates ultrasonic waves, it needs to vibrate itself, thereby generating unnecessary sound waves. At the same time, other sensors or radars on the vehicle may also vibrate due to ultrasonic waves. unnecessary sound waves. However, ultrasonic radars tend to identify unnecessary sound waves as returned waveform signals,...
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The invention discloses a distance detection method and device for preventing ultrasonic aftershocks. The method includes: encoding an ultrasonic signal group to be sent into an encoded signal group with preset encoding, and sending the said ultrasonic signal group to surrounding objects with a car as the center Encoding the signal group; acquiring the echo signal group rebounded by the surrounding objects after receiving the encoded signal group; if it is determined that the echo signal group contains a preset code, reversely decode the echo signal group to obtain a decoded signal; based on The decoded signal determines the distance of the car to surrounding objects. The present invention can generate ultrasonic signals with specific codes through ultrasonic radar, so as to distinguish ultrasonic signals from aftershock signals of various devices. The echo signal accurately calculates the target distance to improve the accuracy of the detection distance.
Description
technical field [0001] The invention relates to the technical field of obstacles around automobiles, in particular to a distance detection method and device for preventing ultrasonic aftershocks. Background technique [0002] With the increasing popularity of automobiles, more and more people are driving cars. In order to improve driving safety and reduce the occurrence of traffic accidents, car manufacturers will install various sensors or radars in cars to perform various detections to assist drivers in driving and reduce driving risks. [0003] One of the commonly used car assisted driving sensors is ultrasonic radar. The detection method is to send ultrasonic waves to the surrounding of the car, and after the surrounding objects bounce the ultrasonic waves, the distance between the car and the surrounding objects is calculated according to the bounced echoes, so as to assist according to the detection distance. remind. Its advantages are that it is small in size, easy ...
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IPC IPC(8): G01S15/10G01S15/931G01S7/539
CPCG01S15/101G01S15/931G01S7/539
Inventor 梁伟培梁文浩廖运明
Owner AUDIOWELL ELECTRONICS GUANGDONG