Ultrasonic frequency hopping distance measurement method and device

A distance measuring method and a technology of a distance measuring device, which are applied to measuring devices, sound wave reradiation, radio wave measuring systems, etc., can solve the problems of large measurement accuracy errors and singleness, and achieve high test accuracy and test anti-interference performance strong effect

Pending Publication Date: 2020-05-19
BEIJING HANGTIAN CHANGXING S & T DEV CO LTD
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Problems solved by technology

Its advantage is that the technical implementation method is simple, and the disadvantage is that due to the use of a single freque

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  • Ultrasonic frequency hopping distance measurement method and device
  • Ultrasonic frequency hopping distance measurement method and device
  • Ultrasonic frequency hopping distance measurement method and device

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[0025] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0026] figure 1 It is a flowchart of an ultrasonic frequency hopping ranging method provided by an embodiment of the present invention. See figure 1 The ultrasonic frequency hopping ranging method includes the following steps:

[0027] S11, transmitting a frequency hopping signal used for ranging, wherein the transmission frequency of the frequency hopping signal is a triangular wave with respect to time.

[0028] S12, receiving the echo signal generated by the frequency hopping signal reflected by the obstacle.

[0029] S13, mixing the frequency hopping signal and the echo signal to obtain frequency difference information between the frequency hopping signal and the echo signal....

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Abstract

The invention provides an ultrasonic frequency hopping distance measurement method and device. The method comprises steps that a frequency hopping signal used for distance measurement is transmitted,and the transmitting frequency of a frequency hopping signal is a triangular wave about the time; an echo signal generated by reflecting the frequency hopping signal is received by an obstacle; the frequency hopping signal is mixed with an echo signal to obtain the frequency difference information between the frequency hopping signal and the echo signal; and the spatial distance with the obstacleis calculated according to the frequency difference information. The ultrasonic frequency hopping distance measurement method is advantaged in that accurate measurement of the spatial distance of theobstacle in a high-interference environment is realized.

Description

technical field [0001] The invention relates to the technical field of space distance measurement between a host computer and a residual current detector in an electrical fire monitoring system, in particular to an ultrasonic frequency hopping distance measurement method and device. Background technique [0002] There are many kinds of space ranging methods in the current domestic electrical fire monitoring system, such as ultrasonic, infrared, frequency hopping and laser ranging. The commonly used ultrasonic generators can be divided into two categories: one is to generate ultrasonic waves by electrical means, and the other is to generate ultrasonic waves by mechanical means. The ultrasonic waves they generate vary in frequency, power, and sonic characteristics, and thus have different uses. The most commonly used is the piezoelectric ultrasonic generator. At present, the main method of ultrasonic distance measurement is that the ultrasonic transmitter emits ultrasonic wa...

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Application Information

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IPC IPC(8): G01S15/34
CPCG01S15/34
Inventor 陈明域
Owner BEIJING HANGTIAN CHANGXING S & T DEV CO LTD
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