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High-precision short-distance ultrasonic ranging method

A distance measurement method, ultrasonic technology, applied in the direction of sound wave reradiation, radio wave measurement system, measurement device, etc., can solve the problems of inability to actively shield, wrong measurement results, limited single-chip clock and interrupt corresponding speed, etc., to achieve reduction The effect of design difficulty

Inactive Publication Date: 2012-03-14
崔莉莉
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Problems solved by technology

The above method completely relies on the peripheral circuit to obtain the measurement accuracy, which is limited by the corresponding speed of the clock and interrupt of the single chip microcomputer, and cannot actively shield the wrong measurement result when it is affected by the environment

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  • High-precision short-distance ultrasonic ranging method
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  • High-precision short-distance ultrasonic ranging method

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Embodiment Construction

[0019] The embodiments of the present invention are described in detail below in conjunction with the accompanying drawings: this embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation methods and specific operating procedures are provided, but the protection scope of the present invention is not limited to the following the described embodiment.

[0020] This embodiment is based on the realization of high-precision short-distance ultrasonic distance measurement controlled by a single-chip microcomputer. The single-chip microcomputer is used to generate an initial measurement signal, the inverter generates a square wave transmission signal, and the comparator generates an ultrasonic reception signal. The measured distance is calculated and uploaded to PC.

[0021] Such as figure 1 As shown, the present embodiment provides a high-precision short-distance ultrasonic ranging method, including the following steps: ...

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Abstract

The invention discloses a high-precision short-distance ultrasonic ranging method, which comprises the following seven steps of: generating an initial signal; generating square wave emission signal; obtaining an ultrasonic receiving signal; calculating a transmitting and receiving time interval; repeatedly calculating and recording; obtaining a median of the transmitting and receiving time interval; and calculating a distance to be tested. The method has a good effect in application. Compared with the prior art, the method has the advantages that: the difficulty in designing a peripheral circuit for the high-precision short-distance ultrasonic ranging is reduced, and a ranging effect with high robustness is achieved at low cost.

Description

technical field [0001] The invention relates to an ultrasonic ranging method in the telecommunication neighborhood, in particular to a method suitable for short-distance and high-precision ultrasonic ranging. Background technique [0002] Ultrasound is widely used in the measurement of short and medium distances, and the measurement distance is in the range of a few tenths to several hundred meters. Depending on the specific application, different implementation methods will be adopted. [0003] After searching the literature of the prior art, it was found that in the article "Design of High-precision Ultrasonic Ranging System" published in Experimental Technology and Management (2010, Vol. 27, No. 3), Kang Yaping and others proposed a method based on The ultrasonic distance measuring method of the single-chip microcomputer innovatively adopts the MAX232 level conversion chip and the double voltage comparator. First, the 40KHz signal belonging to the ultrasonic range is ge...

Claims

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Application Information

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IPC IPC(8): G01S15/08
Inventor 李科煌韩飞沈诗文崔莉莉杜冠儒叶朝敏
Owner 崔莉莉
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