Piezoelectric transducer for detecting static displacement and method therefor

Abstract

The invention relates to a piezoelectric transducer for detecting static displacement and method therefor, belonging to the field of the piezoelectric transducer. The piezoelectric transducer for detecting the static displacement comprises an organic film, and piezoelectric ceramic pieces arranged at the two sides of the organic film; a PCB to be detected is stuck on one piezoelectric ceramic piece, and inverse piezoelectric effect of the piezoelectric ceramic pieces can be utilized to generate driving force, so that the piezoelectric ceramic pieces arranged at the other side of the organic film can generate a certain electrical signal output under the piezoelectric effect; meanwhile, continuous external force is applied on the PCB, and different electrical signal outputs can be generated when the PCB has tiny deformation, and the electrical signal can be detected out by an oscilloscope. The piezoelectric transducer has simple and reliable structure and low cost, and the detection method is simple and practical, so that the invention can be widely applied to industrial production.

Description

【Technical field】 [0001] The invention relates to the field of piezoelectric sensors, in particular to a piezoelectric sensor for detecting static displacement and a method thereof. 【Background technique】 [0002] At present, the development of electronic technology is quite rapid, and PCB boards carrying electronic components are widely used in various electronic products due to their many advantages. In order to improve the reliability of the PCB board, it is often necessary to perform a pressure test on the PCB board, and the PCB will be deformed and bent. However, it is not possible to determine how much pressure the PCB will be subjected to. The device is used to detect the deformation of the PCB and adjust the pressure applied during the test to prevent damage to the PCB board, so that the PCB board can be designed to meet the external pressure range to enhance reliability; in addition, the PCB board will be deformed if the external force is too large. It may cause po...

AI Technical Summary

Problems solved by technology

In order to improve the reliability of the PCB board, it is often necessary to perform a pressure test on the PCB board, and the PCB will be deformed and bent. However, it is not possible to determine how much pressure the PCB will be subjected to. The device is used to detect the deformation of the PCB and adjust the pressure applied during the test to prevent damage to the PCB board, so that the PCB board can be designed to meet the external pressure range to enhance reliability; in addition, the PCB board will be deformed if the external force is too large. It may cause potential failure to the connection of electronic components at the solder joints. However, how much deformation of the PCB board will cause reduced reliability is difficult to distinguish based on experience alone.

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