Ultrasonic based dynamic distance measurement method and system

A technology of distance measurement and ultrasonic wave, which is applied in the field of dynamic distance measurement method and system based on ultrasonic wave, can solve the problems of high ultrasonic transmission power, difficult measurement, increase of sound wave transmission path, etc., achieve signal reception quality assurance, realize dynamic measurement, The effect of a wide ranging range
CN101799545AInactive Publication Date: 2010-08-11BEIJING WUZI UNIVERSITY
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Patent Information

Authority / Receiving Office
CN Β· China
Current Assignee / Owner
BEIJING WUZI UNIVERSITY
Publication Date
2010-08-11
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The invention discloses ultrasonic based dynamic distance measurement method and system, belonging to the technical field of distance measurement. The dynamic distance measurement method comprises the following steps of: sending ultrasonic signals with different frequency spectrum features to a receiving end from a sending end according to a certain frequency and recoding the frequency spectrum features of the ultrasonic signals; receiving wireless signals returned by the receiving end, wherein the wireless signals are transformed from the ultrasonic signals sent by the sending end after the ultrasonic signals are received by the receiving end; and matching and comparing the frequency spectrum features of the ultrasonic signals loaded in the wireless signals with the frequency spectrum features of the ultrasonic signals recorded by the sending end to obtain time differences, and then calculating and determining the distance between the sending end and the receiving end according to the time differences. The method utilizes an ultrasonic technology and a wireless technology to realize the convenient and accurate measurement of the distance between two points in a simple and easy mode and has the advantages of high measurement efficiency, accurate distant measurement result and continuous dynamic measurement.
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Description

technical field

[0001] The present invention relates to the technical field of distance measurement, in particular to a method and system for dynamic distance measurement based on ultrasonic waves. Background technique

[0002] At present, direct measurement, laser ranging or ultrasonic ranging are mostly used for distance measurement. Among them, laser ranging and ultrasonic ranging are used in more and more ranges. This method mainly realizes distance measurement by emitting laser or ultrasonic waves to the target, and using the echoes of laser and ultrasonic waves to calculate the distance. Since both methods must rely on the echoes, there are at least the following disadvantages:

[0003] (1) In the process of continuous movement of the measured object, it is difficult to realize the measurement because the measurement point cannot be aligned;

[0004] (2) When the measurement point of the measured object is difficult to reflect the echo, for example, the measurement po...

Claims

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