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A Vibrating Wire Infrasonic Sensor Based on PVDF

A technology of infrasonic wave and sensor, applied in the field of vibrating wire infrasonic wave sensor, which can solve the problems of large volume, small frequency range and low sensitivity

Inactive Publication Date: 2015-09-16
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a vibrating wire infrasonic sensor based on PVDF, which is used to overcome the shortcomings of existing infrasonic sensors such as low sensitivity, small frequency range, large volume, inconvenient installation and high environmental requirements.

Method used

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  • A Vibrating Wire Infrasonic Sensor Based on PVDF
  • A Vibrating Wire Infrasonic Sensor Based on PVDF
  • A Vibrating Wire Infrasonic Sensor Based on PVDF

Examples

Experimental program
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Effect test

Embodiment 1

[0087] Embodiment 1: as Figure 1-7 As shown, a vibrating wire type infrasonic wave sensor based on PVDF includes a string horse I1, a vibrating string 2, a guide rail 3, a string horse II 4, a PVDF piezoelectric film 7, an elastic diaphragm 8, and a fixing bracket. The fixing bracket includes a clip String device Ⅰ5, steel plate Ⅰ6, right bottom plate 9, string clamping device Ⅱ11, steel plate Ⅱ12, ring part 13; wherein the string bridge Ⅰ1 is installed at the center of the elastic diaphragm 8, and the vibrating string 2 as a receiving element is controlled by the string clamping device Ⅰ5 The string clamping device II11 is fixed and supported by the bridge I1 and the bridge II4. The guide rail 3 is installed on the bottom plate 9 on the right side and has a scale. The electric film 7, the right bottom plate 9 is located on the right side of the fixed bracket, the ring part 13 is located on the left side of the fixed bracket, the steel plate I6 and the steel plate II12 are lo...

Embodiment 2

[0096] Embodiment 2: as Figure 1-7 As shown, a vibrating wire type infrasonic wave sensor based on PVDF includes a string horse I1, a vibrating string 2, a guide rail 3, a string horse II 4, a PVDF piezoelectric film 7, an elastic diaphragm 8, and a fixing bracket. The fixing bracket includes a clip String device Ⅰ5, steel plate Ⅰ6, right bottom plate 9, string clamping device Ⅱ11, steel plate Ⅱ12, ring part 13; wherein the string bridge Ⅰ1 is installed at the center of the elastic diaphragm 8, and the vibrating string 2 as a receiving element is controlled by the string clamping device Ⅰ5 The string clamping device II11 is fixed and supported by the bridge I1 and the bridge II4. The guide rail 3 is installed on the bottom plate 9 on the right side and has a scale. The electric film 7, the right bottom plate 9 is located on the right side of the fixed bracket, the ring part 13 is located on the left side of the fixed bracket, the steel plate I6 and the steel plate II12 are lo...

Embodiment 3

[0104] Embodiment 3: as Figure 1-7 As shown, a vibrating wire type infrasonic wave sensor based on PVDF includes a string horse I1, a vibrating string 2, a guide rail 3, a string horse II 4, a PVDF piezoelectric film 7, an elastic diaphragm 8, and a fixing bracket. The fixing bracket includes a clip String device Ⅰ5, steel plate Ⅰ6, right bottom plate 9, string clamping device Ⅱ11, steel plate Ⅱ12, ring part 13; wherein the string bridge Ⅰ1 is installed at the center of the elastic diaphragm 8, and the vibrating string 2 as a receiving element is controlled by the string clamping device Ⅰ5 The string clamping device II11 is fixed and supported by the bridge I1 and the bridge II4. The guide rail 3 is installed on the bottom plate 9 on the right side and has a scale. The electric film 7, the right bottom plate 9 is located on the right side of the fixed bracket, the ring part 13 is located on the left side of the fixed bracket, the steel plate I6 and the steel plate II12 are lo...

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Abstract

The invention relates to a vibration-wire-type infrasonic wave sensor based on PVDF and belongs to the piezoelectric detection device technology field. The sensor of the invention comprises a bridge I, a vibration wire, a guide rail, a bridge II, a PVDF piezoelectric film, an elastic film sheet and a fixed support. The fixed support comprises a clamp string apparatus I, a steel plate I, a right side base plate, a clamp string apparatus II, a steel plate II and an annular portion. The bridge I is installed at a center of circle of the elastic film sheet. The vibration wire which is served as a receiving component is fixed by the clamp string apparatus I and the clamp string apparatus II and is supported by the bridge I / II. The guide rail is installed on the right side base plate and the bridge II is installed on the guide rail. A lower side of the elastic film sheet is pasted with the PVDF piezoelectric film. The right side base plate is located on a right side of the fixed support. The annular portion is located on a left side of the fixed support. The steel plate I / II are located on two ends of the fixed support. The clamp string apparatus I / II are welded on the steel plate I / II respectively. By using the sensor of the invention, sensitivity and an anti-interference capability at a low-frequency stage of the sensor are increased; the size is small and a measuring range can be adjusted.

Description

technical field [0001] The invention relates to a PVDF-based vibrating wire type infrasonic wave sensor, belonging to the technical field of piezoelectric detection devices. Background technique [0002] In recent years, with the in-depth research of scholars and the continuous development of science and technology, people have gradually deepened their understanding and understanding of infrasound, and with the increasing maturity of computer technology, electronic technology and network technology, the application of infrasound has become more and more It is widely used in positioning and rescue, infrasound weapons, natural disaster prediction and early warning, infrasound medical treatment and other fields. With the wide application of infrasonic waves, infrasonic wave sensors for detecting infrasonic waves are becoming more and more important. [0003] At present, the most widely used infrasonic sensors are capacitive and inductive infrasonic sensors, but the existing in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01H11/08
Inventor 万舟刘豪华程立李懿洋陈主恩油锡存
Owner KUNMING UNIV OF SCI & TECH
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