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Mechanical sensor based on the giant elasto-optic effect of lead lanthanum zirconate titanate transparent ceramics

A technology of lead lanthanum zirconate titanate and transparent ceramics, applied in the field of mechanical sensors, can solve problems such as inability to realize non-contact mode, and achieve the effects of low cost, high sensitivity and wide application range

Active Publication Date: 2021-09-03
HUBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This type of optical fiber mechanical sensor is also a contact sensor, which cannot realize the non-contact mode required in harsh conditions

Method used

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  • Mechanical sensor based on the giant elasto-optic effect of lead lanthanum zirconate titanate transparent ceramics
  • Mechanical sensor based on the giant elasto-optic effect of lead lanthanum zirconate titanate transparent ceramics
  • Mechanical sensor based on the giant elasto-optic effect of lead lanthanum zirconate titanate transparent ceramics

Examples

Experimental program
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Effect test

Embodiment 1

[0061] Embodiment 1: The polarizer is installed separately from the prestressing fixture

[0062] see figure 2 , the preparation, adjustment and calibration of mechanical sensors based on the giant elastic-optic effect of lead zirconate titanate transparent ceramics adopt the following steps:

[0063] ⑴Preparation of PLZT electrically controlled light scattering transparent ceramics

[0064] The PLZT transparent ceramic 3 is prepared by the hot pressing sintering method reported by G.H.Haertling and C.E.Land et al. The ratio of Pb and La is 92%:8%, and the ratio of Zr and Ti is 65%:35%. When preparing PLZT transparent ceramics, vacuumize first, and then sinter with oxygen hot pressure to ensure that the prepared ceramics are transparent and uniform, and have a very large elastic-optical coefficient. After sintering to prepare a transparent ceramic body, according to the size of the light-transmitting area and the stress measurement range in actual use, the PLZT transparent ...

Embodiment 2

[0077] Embodiment 2: The polarizer is installed separately from the prestressing fixture

[0078] see figure 2 The difference between Embodiment 2 and Embodiment 1 of the preparation, adjustment and calibration of the mechanical sensor based on the giant electro-optical effect of lead zirconate lanthanum titanate transparent ceramics is that only the first polarizer 2 and the second polarizer 5 are combined The prestressed clamps 4 are combined and installed together. This combined installation can make the adjustment of the readout optical path easier, and it is not necessary to repeatedly adjust the installation and fixing brackets. It is only necessary to adjust the center alignment of the incident light source 1, PLZT transparent ceramic 3, and photodetector 6. Other parts of the structure and steps are the same as in Embodiment 1.

[0079] In the second embodiment, the prestressed fixture 4 and the PLZT transparent ceramic 3 are designed as a whole with the installatio...

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Abstract

The invention discloses a mechanical sensor based on the giant elasto-optic effect of lead lanthanum zirconate titanate transparent ceramics, including an incident light source, a first polarizer, PLZT transparent ceramics, a prestressed fixture, a second polarizer, a photoelectric detector, detection conversion and display circuit. PLZT transparent ceramic is a material with a giant elastic optical effect. The polarization directions of the first polarizer and the second polarizer are placed perpendicular to each other, and are at an angle of 45° to the direction of the force applied to the PLZT transparent ceramic. The stress on the PLZT transparent ceramic varies with the external force. The pressure or tension to be measured changes, and the photodetector 6 and detection conversion and display circuit 7 are used to detect and display the stress to be measured with the external application. The mechanical sensor of the present invention is read out in a non-contact mode, and the mechanical sensing measurement has no influence on light intensity, has strong anti-interference ability, unlimited distance, and is suitable for harsh places such as high temperature and strong field. Compact structure, simple adjustment, low cost, flexible and extensive application.

Description

technical field [0001] The invention relates to a mechanical sensor based on the giant elastic-optical effect of lead lanthanum zirconate titanate transparent ceramics, specifically a method for preparing a mechanical sensor by applying the characteristics of lead lanthanum zirconate titanate (PLZT) transparent ceramics with giant elastic-optical effect, belonging to elastic Optical material and sensor technology field. Background technique [0002] A force sensor is a sensor that senses a force and converts it into a usable output signal. There are many types of mechanical sensors, including: resistance strain gauge stress sensors, semiconductor strain gauge stress sensors, piezoresistive stress sensors, piezoelectric stress sensors, inductive stress sensors, capacitive stress sensors, resonant stress sensors, etc. . The common feature of these mechanical sensors is that the sensors are composed of force sensitive elements (that is, elastomers, common materials are alumin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01L1/24
CPCG01L1/241
Inventor 王龙海陈铭胡峰铨王世敏郑克玉卫锐杨贝贝明新华
Owner HUBEI UNIV