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Piezoelectric element detection system and method and application

A piezoelectric element and detection system technology, applied in the field of detection, can solve the problems of piezoelectric cantilever beams that cannot be fed back in time, engineering failures, poor driving effects, etc.

Pending Publication Date: 2021-02-23
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] As a smart material, piezoelectric ceramics can realize the mutual conversion between electrical energy and mechanical energy. Among them, the application of piezoelectric cantilever beam structure is more common, and it is widely used in fields such as vibration energy harvesters, energy harvesters, vibration suppression, and micro-drive devices. In these engineering applications, the piezoelectric cantilever works as a driver under the drive control circuit and acts on the driven part. Under long-term work, the working state of the piezoelectric cantilever cannot be fed back in time, so that the aging of the piezoelectric, the glue layer Under external factors such as peeling, the driving effect is not good, and serious cases can lead to engineering failures
In addition, the operating frequency of the piezoelectric cantilever is relatively high. Under long-term working conditions, the wear and tear of the piezoelectric cantilever and other failures caused by its own physical properties are transient processes, and it is difficult to judge when the piezoelectric cantilever is in poor condition. working status

Method used

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  • Piezoelectric element detection system and method and application
  • Piezoelectric element detection system and method and application
  • Piezoelectric element detection system and method and application

Examples

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Effect test

Embodiment 1

[0072] A piezoelectric element detection system, such as figure 1 As shown, it includes: a drive circuit 9, a piezoelectric element 4, a signal detection circuit 10 and a data processing module 11 connected in sequence; the data processing module 11 is used to calculate the actual output current value of the piezoelectric element 4, and convert the piezoelectric The actual output current value of the element 4 is compared with the output current threshold when the piezoelectric element 4 is in normal working state, and it is judged whether the piezoelectric element 4 is in an abnormal working state.

[0073] The driving circuit 9 is used to transmit electric energy to the piezoelectric element 4 to realize the electrical open circuit and electrical short circuit of the piezoelectric element 4, and provide different electrical boundary conditions for the piezoelectric element 4. According to different application occasions of the piezoelectric element 4, the piezoelectric The m...

Embodiment 2

[0083] A piezoelectric element detection method, according to a piezoelectric element detection system described in any one of the technical solutions in Embodiment 1, comprising: setting the mechanical boundary conditions of the piezoelectric element 4, and setting the piezoelectric element through the drive circuit 9 4. Set the electrical boundary conditions; the output signal of the piezoelectric element 4 is sent to the data processing module 11 for processing through the signal detection circuit 10, and the actual output current value of the piezoelectric element 4 is calculated; the actual output current value of the piezoelectric element 4, Compared with the output current threshold value of the piezoelectric element 4 under the set mechanical boundary conditions and electrical boundary conditions when the working state is normal, it is judged whether the working state of the piezoelectric element 4 is abnormal.

[0084]Under different electrical boundary conditions and ...

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PUM

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Abstract

The invention discloses a piezoelectric element detection system and method and application, and relates to the technical field of detection. The piezoelectric element detection system comprises a driving circuit, a piezoelectric element, a signal detection circuit and a data processing module which are connected in sequence, wherein the data processing module is used for calculating an actual output current value of the piezoelectric element, comparing the actual output current value of the piezoelectric element with an output current threshold value when the working state of the piezoelectric element is normal, and judging whether the working state of the piezoelectric element is abnormal or not. Aiming at the technical problem that the abnormal working state of a piezoelectric cantilever beam is difficult to judge, the piezoelectric element detection system can detect the working state of the piezoelectric cantilever beam, and can judge the abnormal working state of the piezoelectric cantilever beam in advance.

Description

technical field [0001] The invention relates to the technical field of detection, in particular to a piezoelectric element detection system, method and application. Background technique [0002] As a smart material, piezoelectric ceramics can realize the mutual conversion between electrical energy and mechanical energy. Among them, the application of piezoelectric cantilever beam structure is more common, and it is widely used in fields such as vibration energy harvesters, energy harvesters, vibration suppression, and micro-drive devices. In these engineering applications, the piezoelectric cantilever works as a driver under the drive control circuit and acts on the driven part. Under long-term work, the working state of the piezoelectric cantilever cannot be fed back in time, so that the aging of the piezoelectric, the glue layer Under external factors such as peeling, the driving effect is not good, and serious cases can lead to engineering failures. In addition, the oper...

Claims

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Application Information

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IPC IPC(8): G01R29/22
CPCG01R29/22Y02T90/00
Inventor 彭来湖钟垚森伍德戴宁汝欣
Owner ZHEJIANG SCI-TECH UNIV
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