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Automobile collision avoidance control method based on temperature-compensated ultrasonic ranging device

A technology of distance measuring device and temperature compensation, applied in the direction of measuring device, re-radiation of sound wave, signal device, etc. simple method effect

Inactive Publication Date: 2015-03-25
SUZHOU OUBORI AUTOMATION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This invention meets the requirements of general short-distance distance measurement, and has low cost and good cost performance. It can be widely used in small-distance distance measurement, robot detection, and vehicle reversing radar. However, the influence of temperature has not been considered and the measurement accuracy needs to be further improved. improve

Method used

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Embodiment Construction

[0027] The technical scheme of the present invention is described in further detail below:

[0028] An automobile collision avoidance control method based on a temperature-compensated ultrasonic distance measuring device, specifically comprising the following steps:

[0029] Step 1, preset distance parameters from obstacles, including dangerous distance and safety distance threshold parameters; an ultrasonic transmitting circuit and an ultrasonic receiving circuit are arranged at the front of the vehicle body;

[0030] Step 2, using the ultrasonic transmitting circuit to transmit ultrasonic waves and simultaneously sending a timing start signal to start timing;

[0031] Step 3, when the ultrasonic receiving circuit receives the ultrasonic waves emitted by the ultrasonic transmitting circuit for the first time, it simultaneously sends a stop signal to stop timing;

[0032] Step 4, count the time between receiving the timing start signal sent by the ultrasonic transmitting cir...

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Abstract

The invention discloses an automobile collision avoidance control method based on a temperature-compensated ultrasonic ranging device. In order to further improve the measuring accuracy and stability of a system, a temperature sensor temperature measuring circuit is additionally arranged on hardware, the sound velocity is corrected by employing a method for combining sound velocity presetting and medium temperature measuring, and influence on the ranging accuracy caused by temperature change is reduced. The measuring accuracy of an ultrasonic ranging system is strongly improved. A driver can be reminded in time by accurately calculating the automobile distance, and automobile accidents are effectively avoided.

Description

technical field [0001] The invention relates to an ultrasonic distance measuring method, in particular to an automobile anti-collision control method based on a temperature-compensated ultrasonic distance-finding device, belonging to the field of automobile anti-collision control. Background technique [0002] Ultrasound is a kind of mechanical vibration in elastic medium, which is caused by the vibration source in contact with the medium, and its frequency is above 20kHz. Since the speed of ultrasonic waves is much smaller than the speed of light, its propagation time is easier to detect, and it is easy to directional emission, with good directionality and good intensity control, so the use of ultrasonic ranging is very important in many distance detection applications. Including non-destructive testing, process measurement, robot measurement and positioning, and fluid level measurement, etc. [0003] In the air, the propagation velocity of ultrasonic waves at normal tempe...

Claims

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Application Information

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IPC IPC(8): B60Q9/00B60T7/12G01S7/52G01S15/93
Inventor 谢敏富胡清华高娟
Owner SUZHOU OUBORI AUTOMATION TECH