An ultra-long-distance ultrasonic measuring instrument

Abstract

The invention relates to a super-remote-distance ultrasonic measuring instrument, in particular to an ultrasonic ranging device applied to an automobile body. The super-remote-distance ultrasonic measuring instrument comprises an ultrasonic transmitting module, an ultrasonic receiving module, a single chip microcomputer and a gear control circuit module. Firstly, the single chip microcomputer produces a section of square wave signals, the ultrasonic transmitting module transmits out the square wave signals, meanwhile the single chip microcomputer transmits a wide-pulse signal to the gear control circuit module, the gear control circuit module gradually lowers high-level voltage, accordingly the time for receiving echo signals is gradually prolonged, the single chip microcomputer constantly adjusts the time length for transmission of the square wave signals thereout, receives the amplification times of an amplifying circuit and judges an actual measurement distance according to the time of finally receiving the signals and a gear position. The super-remote-distance ultrasonic measuring instrument increases the measurement distance to be 18-20 m, meanwhile is simple in structure and high in distance measuring efficiency, is not affected by environment temperature and vibration and can be well mastered by a user and applied to actual production and usage.

Description

technical field [0001] The invention relates to an ultra-long-distance ultrasonic measuring instrument (Ultrasonic Meter for Incredible Distances), in particular to an ultrasonic distance measuring device applied to automobile bodies. Background technique [0002] Ultrasonic waves are produced by mechanical vibrations and can propagate at different speeds in different media. Due to the strong directivity of ultrasonic waves, slow energy consumption, and long distances in the medium, ultrasonic waves are often used for distance measurement, such as distance meters and level measuring instruments, etc. can be realized by ultrasonic waves. Ultrasonic ranging is a non-contact detection method. Compared with other methods, such as electromagnetic or optical methods, it is not affected by light, the color of the measured object, etc. It has a certain ability to adapt to the dark, dusty, smoky, electromagnetic interference, toxic and other harsh environments. Therefore, it is wi...

AI Technical Summary

Problems solved by technology

Although the phase detection method has high precision, the detection range is limited; the acoustic wave amplitude detection method is easily affected by reflected waves

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