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Anti-collision alarm system ultrasonic blind area processing method and anti-collision alarm system

A technology of alarm system and processing method, applied in the direction of sound wave re-radiation, radio wave measurement system, instrument, etc., can solve the problems of unfavorable long-distance obstacle identification and increase system cost, so as to reduce production cost, improve practicability, Improve the effect of redundant time

Active Publication Date: 2020-12-29
LIANCHUANG AUTOMOBILE ELECTRONICS
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AI Technical Summary

Problems solved by technology

Although the first method is beneficial to accurately read the distance signal, it greatly increases the system cost; the second method reduces the number of ultrasonic transmission pulses, which will shorten the longest recognition distance, which is not conducive to the recognition of long-distance obstacles.

Method used

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  • Anti-collision alarm system ultrasonic blind area processing method and anti-collision alarm system

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Embodiment Construction

[0051] The invention provides a method for processing the ultrasonic blind area of ​​an anti-collision alarm system capable of avoiding the ultrasonic detector blind area caused by the failure of the ultrasonic sensor to receive the echo signal, comprising the following steps:

[0052] The highest alarm level flag of the anti-collision alarm system is set as the trigger condition of the blind zone signal processing, and the blind zone signal processing is triggered when the highest alarm level flag is reached;

[0053] When triggering blind zone signal processing;

[0054] If H≤A, maintain the highest alarm level flag;

[0055] If H>A, compare H with B, if n consecutive detection cycles H≥B, output H corresponding to the alarm level flag, otherwise maintain the highest alarm level flag, where A

[0056] Wherein, A is the first distance threshold, B is the second distance threshold, H is the echo distance of the ultrasonic detector of the anti-collision warning system, and ...

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Abstract

The invention discloses an ultrasonic blind zone processing method for an anti-collision alarm system. The method includes the steps of triggering a blind zone signal processing when reaching the highest alarm level flag bit; if H < / =A, maintaining the highest alarm level flag bit; if H>A and H> / =B for n successive detection periods, outputting an alarm level flag bit corresponding to H, and otherwise maintaining the highest alarm level flag bit, where A<B; and if A<H<B for m successive detection periods, outputting the alarm level flag bit corresponding to H, and otherwise maintaining the highest alarm level flag bit, where A is a first distance threshold, B is a second distance threshold, H is an ultrasonic probe echo distance of the anti-collision alarm system, n>5, and m>5. The method of the invention can well solve the problem that signals jump and disappear in a detection blind zone of a sensor, is conducive to avoiding the driving safety hazard caused by false positives and non-reporting, and greatly improves the active safety performance of driving and the reliability of an intelligent driving assistance function.

Description

technical field [0001] The invention relates to the field of automobiles, in particular to a method for processing an ultrasonic blind area of ​​an anti-collision alarm system in a vehicle advanced driver assistance system (ADAS). The invention also relates to an anti-collision alarm system adopting the method for processing the ultrasonic blind area of ​​the automobile anti-collision alarm system. Background technique [0002] With the development of science and technology and the rapid increase in the number of cars, people have higher and higher requirements for the safety and intelligence of car driving. Intelligent driving has become an important trend in the development of the automotive industry, and advanced driver assistance systems (ADAS) are developing rapidly. When it detects that the vehicle is approaching an obstacle, the anti-collision warning system informs the driver of the obstacle distance information with sound and image signals, helping the driver to el...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S15/931G01S7/539
CPCG01S7/539G01S15/931
Inventor 李振鹏
Owner LIANCHUANG AUTOMOBILE ELECTRONICS
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