Surface-acoustic-wave-based micro-position sensor

A surface acoustic wave and sensor technology, applied in the direction of using ultrasonic/sonic/infrasonic waves, instruments, measuring devices, etc., can solve the problems that micro position sensors have not been reported, and achieve accurate and reliable detection results, high sensitivity, and wide application range Effect

Inactive Publication Date: 2017-10-03
成都灯岛科技有限公司
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Problems solved by technology

At present, the micro position sensor based on SAW sensing method has not been reported

Method used

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  • Surface-acoustic-wave-based micro-position sensor
  • Surface-acoustic-wave-based micro-position sensor
  • Surface-acoustic-wave-based micro-position sensor

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Embodiment Construction

[0020] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings, but the content protected by the present invention is not limited to the following description.

[0021] Such as figure 1 As shown, the micro-position sensor based on the surface acoustic wave includes a square piezoelectric substrate 1, and the inner walls of the two sides of the piezoelectric substrate 1 in the vertical direction are correspondingly provided with a first surface acoustic wave emitter 2 and a second surface acoustic wave emitter. The surface acoustic wave receiver 3 is provided with a second surface acoustic wave transmitter 4 and a second surface acoustic wave receiver 5 on the inner walls of the two sides of the piezoelectric substrate 1 in the horizontal direction. The surface acoustic wave transmitter 2, the first surface acoustic wave receiver 3, the second surface acoustic wave transmitter 4 and the second surface acousti...

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Abstract

The invention discloses a micro-position sensor based on surface acoustic waves, which comprises a square piezoelectric substrate (1), and the inner walls of the two sides in the vertical direction of the piezoelectric substrate (1) are correspondingly provided with first acoustic sensors. The surface wave transmitter (2) and the first surface acoustic wave receiver (3), the inner walls of the two sides of the piezoelectric substrate (1) in the horizontal direction are correspondingly provided with the second surface acoustic wave transmitter (4) and the second surface acoustic wave receiver (5), the first surface acoustic wave transmitter (2), the first surface acoustic wave receiver (3), the second surface acoustic wave transmitter (4) and the second The surface acoustic wave receivers (5) are respectively located at the four corners of the piezoelectric substrate (1), and reflective grids (6) are provided on the inner walls of the four sides of the piezoelectric substrate (1). The micro position sensor of the present invention is made by using the emission and reception principle of the surface acoustic wave, has small volume, high sensitivity, high measurement accuracy and is not easily affected by noise.

Description

technical field [0001] The invention relates, in particular, to a micro position sensor based on surface acoustic waves. Background technique [0002] Surface acoustic wave (SAW) is a kind of sound wave whose energy is concentrated on the surface of the ground, which was accidentally discovered by the British physicist Rayleigh in the process of studying seismic waves in the 1880s. Surface acoustic wave is an elastic wave propagating on the shallow surface of solid. It has several modes, mainly including Rayleigh wave, Love wave, Lamb wave, B2G wave, leaky shear surface acoustic wave and quasi-longitudinal leaky fast surface acoustic wave mode. surface acoustic waves, etc. [0003] In 1965, American White and Waltermer published a paper entitled "A New Type of Surface Acoustic Wave Acoustic-Electrical Converter", which made a key breakthrough in surface acoustic wave technology. For the first time, the interdigital transducer IDT was used to excite SAW. Accelerated the dev...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B17/00
CPCG01B17/00
Inventor 张凯
Owner 成都灯岛科技有限公司
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