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Transverse piezoelectric strain constant measuring method by piezoelectric material quasistatic method and system thereof

A piezoelectric strain constant, quasi-static method, applied in measuring devices, measuring electrical variables, instruments, etc., can solve problems such as poor practicability, cumbersome piezoelectric constant testing process, and large piezoelectric constant error and repeatability.

Inactive Publication Date: 2008-12-03
INST OF ACOUSTICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem of measuring piezoelectric material d by dynamic method in the past. 31 The piezoelectric constant test process is cumbersome, the defect of poor practicability, and the solution to the static method to measure d 31 The piezoelectric constant error is large and the repeatability is poor, so as to provide a simple and practical method suitable for measuring piezoelectric materials of various shapes and meeting the measurement accuracy requirements. 31 Piezoelectric constant quasi-static measurement method and system

Method used

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  • Transverse piezoelectric strain constant measuring method by piezoelectric material quasistatic method and system thereof
  • Transverse piezoelectric strain constant measuring method by piezoelectric material quasistatic method and system thereof
  • Transverse piezoelectric strain constant measuring method by piezoelectric material quasistatic method and system thereof

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Embodiment Construction

[0063] Now, the measurement method and system of the present invention will be further described in detail with reference to the above-mentioned figures and embodiments.

[0064] refer to figure 2 And 5, making an embodiment of a piezoelectric material quasi-static transverse piezoelectric strain constant measurement system composed of a force device and a circuit device.

[0065] The electromagnetic driver reference in the force applying device of this embodiment Figure 4 , consisting of magnetic steel 33, yoke iron core 36, outer yoke iron 34, yoke iron base 35, coil 32, piston 31 and centering strut 30, wherein the outer yoke iron 34 is fixed on the yoke iron base 35, the coil 32 The upper end is connected with the lower end of the piston 31, and is fixed on the end face of the outer yoke 34 by the centering strut 30, and the winding part of the coil 32 is suspended in the magnetic field gap formed by the magnetic steel 33, the yoke core 36 and the outer yoke 34. Inside,...

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Abstract

The invention relates to a measuring method and system for d31 piezoelectric constant that adopts quasi-static method to testing d21 piezoelectric. The system is made up of energizing equipment and circuit equipment. The energizing equipment supplies acting force to testing sample by special stressing accessory. Circuit equipment supplies electric driving signal and taking amplifying and processing to low frequency alternating voltage signal, and display d31 piezoelectric constant. It has the advantages of easy to operate, rapid and accurate.

Description

technical field [0001] The invention relates to a method for measuring the piezoelectric constant of piezoelectric materials, in particular to the transverse piezoelectric strain constant of piezoelectric materials (referred to as d 31 A measurement method and measurement system for piezoelectric constant). technical background [0002] The piezoelectric constant is an important parameter to characterize the piezoelectric properties of piezoelectric materials, mainly including the longitudinal piezoelectric strain constant d 33 (measurement method can refer to the applicant's authorized patent " quasi-static method longitudinal piezoelectric strain constant measuring instrument on February 6, 99, the patent number is: ZL97231420.2), transverse piezoelectric strain constant d 31 , the tangential piezoelectric strain constant d 15 and the isostatic piezoelectric constant d h Wait. For the transverse piezoelectric strain constant d 31 In the past, the measurement of dynami...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R29/22
Inventor 潘潮陈守六金亨焕易晓星章力旺
Owner INST OF ACOUSTICS CHINESE ACAD OF SCI
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