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Vibration-sensing structures with temperature compensation based on surface acoustic waves

A technology of surface acoustic wave and temperature compensation, applied in the direction of measuring ultrasonic/sonic/infrasonic waves, measuring devices, instruments, etc., can solve the problems of not being able to monitor vibration and not having temperature compensation function, and achieve simple structure and low production cost , the effect of high measurement accuracy

Inactive Publication Date: 2018-02-13
CHANGZHOU SMARTSAW SENSING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although it can be used in this application, this design can only be used to monitor the occurrence of vibration at a specific frequency, not can be used to monitor vibration in a wide frequency range, and does not have temperature compensation function

Method used

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  • Vibration-sensing structures with temperature compensation based on surface acoustic waves
  • Vibration-sensing structures with temperature compensation based on surface acoustic waves
  • Vibration-sensing structures with temperature compensation based on surface acoustic waves

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Embodiment Construction

[0023] The present invention will be further described below in conjunction with the accompanying drawings and given embodiments, but is not limited thereto.

[0024] Such as figure 1 , 2 , 3, a sensing vibration sensing structure with temperature compensation based on surface acoustic waves, including a housing 1 and a housing cover 2, the housing 1 and the housing cover 2 are hermetically connected, and it:

[0025] a. It also includes a base 8, a piezoelectric substrate 3 and three surface acoustic wave resonators 4, and the base 8 is fixed on the bottom of the housing 1;

[0026] b. One end of the piezoelectric substrate 3 is a fixed end, and the other end is a cantilevered end. The fixed end of the piezoelectric substrate 3 is fixed on the base 8 and is higher than the bottom surface of the housing 1,

[0027] The three surface acoustic wave resonators 4 are all arranged on the upper surface of the piezoelectric substrate 3;

[0028] c. The three surface acoustic wave ...

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PUM

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Abstract

The invention relates to a sensing vibration sensing structure with temperature compensation based on surface acoustic waves, which includes a housing and a housing cover, and the housing and the housing cover are sealed and connected, and also includes a base, a piezoelectric substrate and three In the surface acoustic wave resonator, the base is fixed on the bottom of the housing; one end of the piezoelectric substrate is a fixed end, and the other end is an overhanging end, and the fixed end of the piezoelectric substrate is fixed on the base , and higher than the bottom surface in the housing, the three surface acoustic wave resonators are all located on the upper surface of the piezoelectric substrate; the three surface acoustic wave resonators are connected in parallel, and the resonance frequencies are different; the three surface acoustic wave resonators The surface acoustic waves generated by the surface acoustic wave resonator all propagate in the Y direction, and the Y direction refers to the direction perpendicular to the extending direction along the fixed end of the piezoelectric substrate to the overhanging end of the piezoelectric substrate . The invention has the advantages of simple and compact structure, low production cost, capable of monitoring vibration and temperature, and high measurement accuracy.

Description

technical field [0001] The present invention specifically relates to a surface acoustic wave based sensing vibration sensing structure with temperature compensation. Background technique [0002] Existing real-time structural health monitoring (SHM) is key to the control of many industrial processes. In many industrial applications, it is very important to monitor the health of mechanical components in motion, such as the real-time monitoring of the vibration status of loaded bearings of high-speed train wheels. Replacing the current Schedule Based Maintenance (SBM) with Condition Based Maintenance (CBM) is an effective way to reduce maintenance and operating costs. In all of these cases, real-time health monitoring with multiple types of sensors is key to maximizing continuous uptime. The compact, wireless and passive sensors are especially suitable for continuous and real-time real-time structural health monitoring in hazardous environments, such as outdoor harsh weather...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01H11/08
Inventor 高翔刘文
Owner CHANGZHOU SMARTSAW SENSING TECH
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