Non-blind area ultrasonic distance measurement probe and distance measurement method

Abstract

The present invention discloses a non-blind area ultrasonic distance measurement probe and distance measurement method. The probe includes an ultrasonic transmitter T, a first ultrasonic receiver R1 and a second ultrasonic receiver R2 which are located on the same plane; a distance from the first ultrasonic receiver R1 to the ultrasonic transmitter T is equal to a distance from the second ultrasonic receiver R2 to the ultrasonic transmitter T; the first ultrasonic receiver R1 and the second ultrasonic receiver R2 are located at the same side of the ultrasonic transmitter T; the second ultrasonic receiver R2 is covered with a container with a groove formed at the side surface of the container, so that echoes can be isolated; the direction of the groove of the container direclty faces the ultrasonic transmitter T; and the first ultrasonic receiver R1 and the second ultrasonic receiver R2 can be simultaneously subjected to the influence of crosstalk lateral waves of the ultrasonic transmitter T in an equal-amplitude manner. The influence of the crosstalk lateral waves is eliminated through an anti-phase superposition method, and therefore, non-blind area ultrasonic distance measurement can be realized. The non-blind area ultrasonic distance measurement probe and distance measurement method have the advantages of simple structure, easiness in implementation and excellent effects.

Description

technical field [0001] The invention belongs to the field of ultrasonic distance measurement, in particular to an ultrasonic distance measurement probe without a blind zone and a distance measurement method. Background technique [0002] Ultrasound follows the general law of mechanical wave propagation in elastic media. It is characterized by propagating in a straight line, with good beam forming and good directionality. Reflection and refraction will occur at the interface of the medium. After entering the medium, its vibration amplitude Attenuation occurs due to absorption in the medium. Ultrasonic frequencies can be very high, reaching megahertz levels. [0003] The propagation speed of ultrasonic waves in the same medium is basically constant, so by measuring the time it takes for ultrasonic waves to pass a certain distance in the medium, non-contact distance measurement can be realized. In order to improve the accuracy of ranging, it is necessary to accurately measure...

AI Technical Summary

Problems solved by technology

In order to further reduce the measurement blind zone, the method of time-varying gain suppression is powerless

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