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Ultrasonic distance measuring method and device based on multiple emission frequencies

A technology of transmitting frequency and ultrasonic waves, which is applied in measurement devices, re-radiation of sound waves, radio wave measurement systems, etc. It can solve the problems of low measurement accuracy of ultrasonic ranging technology, and achieve the effect of novel design and high ranging accuracy.

Inactive Publication Date: 2015-04-22
STATE GRID CORP OF CHINA +1
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Problems solved by technology

[0006] The invention solves the problem of low measurement accuracy of the existing ultrasonic ranging technology, and provides an ultrasonic ranging method and device based on multiple transmission frequencies

Method used

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  • Ultrasonic distance measuring method and device based on multiple emission frequencies
  • Ultrasonic distance measuring method and device based on multiple emission frequencies
  • Ultrasonic distance measuring method and device based on multiple emission frequencies

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Embodiment Construction

[0015] Ultrasonic distance measurement method based on multiple transmission frequencies, including the transmission and reception of ultrasonic pulse signals in one measurement period. The transmitted ultrasonic pulse signals are 8 ultrasonic pulse signals of different frequencies, and ultrasonic pulse signals at each frequency Start timing at the transmission time and stop timing when the echo signal of the corresponding frequency is received. In this way, a maximum of 8 time values ​​can be obtained. Take the arithmetic average of these time values ​​to obtain the calculated value t of the ultrasonic pulse signal propagation time of this measurement period. 0 , Into the formula s=170 t 0 In, the distance s from the object to be measured is obtained.

[0016] Ultrasonic distance measuring device based on multiple transmission frequencies, including control unit MCU1. The signal output end of the control unit MCU is connected to the ultrasonic generating circuit 2, and the ultraso...

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Abstract

The invention relates to an ultrasonic distance measuring technology, in particular to an ultrasonic distance measuring method and device based on multiple emission frequencies. The problem that an existing ultrasonic distance measuring technology is low in measuring precision is solved. The ultrasonic distance measuring method includes the steps that ultrasonic pulse signals are emitted and received within a measurement period, wherein the emitted ultrasonic pulse signals are eight ultrasonic pulse signals of different frequencies; timekeeping is started when the ultrasonic pulse signal of each frequency is emitted; timekeeping is stopped when echo signals of corresponding frequencies are received; in this way, at most eight time values are obtained, an arithmetic mean value of the time values is obtained, then a calculation value t0 of ultrasonic pulse signal propagation time within the measurement period is obtained and brought into the formula s=170t0, and finally the distance s from an object to be measured is obtained. The method and device are high in distance measuring precision. According to the technical scheme, the ultrasonic distance measuring method and device are novel and unique in design and suitable for various distance measuring fields.

Description

Technical field [0001] The invention relates to an ultrasonic ranging technology, in particular to an ultrasonic ranging method and a device based on multiple emission frequencies. Background technique [0002] There are generally three methods of distance measurement using sensors: laser distance measurement, ultrasonic distance measurement and eddy current distance measurement. The eddy current ranging sensor has high sensitivity and limited measurement range (1~10mm), which is only suitable for short-distance testing. The laser ranging sensor is suitable for long-distance measurement, and the measurement range can reach several kilometers or even farther. It has high environmental requirements, and smoke and dust have a great impact on laser propagation. The measuring range of ultrasonic sensors is 2cm-7m, which is often fast, convenient, simple to calculate, and easy to achieve real-time control. [0003] Acoustic waves with a frequency above 20KHz are called ultrasonic waves...

Claims

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Application Information

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IPC IPC(8): G01S15/08
CPCG01S15/08
Inventor 郭瑞敏赵锐钟晓霞
Owner STATE GRID CORP OF CHINA
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