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Piezoelectric sensor, beam type concrete sensor, and preparation methods and application thereof

A piezoelectric sensor and beam-type technology, applied in the manufacture/assembly of piezoelectric/electrostrictive devices, piezoelectric/electrostrictive/magnetostrictive devices, circuits, etc., can solve the problem of being easily affected by the external environment, reflection Signal instability, easy damage and other problems, to achieve the effect of good dynamic characteristics, low cost, simple application method

Inactive Publication Date: 2011-04-20
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the shortcomings of the above-mentioned sensor reflection signal instability, easy damage, short life, and easy to be affected by the external environment, the present invention provides a piezoelectric sensor. The piezoelectric sensor has good compatibility with concrete, high sensitivity, and fast response. Fast, simple preparation process and low cost

Method used

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  • Piezoelectric sensor, beam type concrete sensor, and preparation methods and application thereof
  • Piezoelectric sensor, beam type concrete sensor, and preparation methods and application thereof
  • Piezoelectric sensor, beam type concrete sensor, and preparation methods and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0038] Such as figure 1 The piezoelectric sensor includes a sensing element, the sensing element includes a piezoelectric material 2 and a pair of electrodes 1 located on the upper and lower surfaces of the piezoelectric material, and a packaging shell 4 is covered outside the sensing element, and the piezoelectric material A pair of electrodes on the top is connected by a shielding wire 3 that runs through the package shell, and the package shell is made by mixing glycidyl ether epoxy resin, diethylenetriamine and cement at a mass ratio of 1:0.4:1. The piezoelectric material used is lead zirconate titanate ceramics, the electrode used is silver electrode, the cement used is barium sulfoaluminate cement clinker 70%, gypsum 10%, limestone 20%, water-cement ratio 0.25.

[0039] The preparation process is as follows: mix glycidyl ether epoxy resin, diethylenetriamine and cement evenly according to the mass ratio of 1:0.4:1, plate silver on the upper and lower surfaces (two stres...

Embodiment 2

[0041] The structure of the piezoelectric sensor is the same as that of Example 1, except that the package shell is made by mixing glycidyl ester epoxy resin, triethylenetetramine and cement at a mass ratio of 1: 0.4: 1, and the cement used is barium sulfur Aluminate cement clinker 76%, gypsum 5%, limestone 19%, water-cement ratio 0.3. The piezoelectric material used is a cement-based piezoelectric composite material, and the electrodes are silver electrodes.

[0042] The preparation process is: according to the mass ratio of 1:0.4:1, glycidyl ester epoxy resin, triethylenetetramine and cement are evenly mixed, and silver is plated on the upper and lower surfaces (two stress surfaces) of the cement-based piezoelectric composite material. Connect the two electrodes with a shielded wire, then put the sensing element into the mold, pour the above-mentioned mixture of glycidyl ester epoxy resin, triethylenetetramine and cement into the mold and harden for 3 days, and demould to ob...

Embodiment 3

[0044] The piezoelectric sensor structure is the same as in Example 1, except that the package shell is made by mixing linear aliphatic epoxy resin, triethylenetetramine and cement at a mass ratio of 1: 0.4: 1, and the cement used is barium Sulphoaluminate cement clinker 80%, gypsum 10%, limestone 10%, water-cement ratio 0.4. The piezoelectric material used is lead niobium magnesium zirconate titanate ceramics, and the electrodes are conductive silver glue electrodes.

[0045] The preparation method is the same as in Example 1.

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Abstract

The invention discloses a piezoelectric sensor. The piezoelectric sensor comprises an induction component, wherein the induction component comprises a piezoelectric material and a pair of electrodes positioned on the upper surface and the lower surface of the piezoelectric material; an encapsulated shell is wrapped outside the induction component; the pair of electrodes on the piezoelectric material are connected with each other through a screened lead running through the encapsulated shell; and the encapsulated shell is prepared by mixing epoxy resin, a curing agent and cement according to the mass ratio of the epoxy resin to the curing agent to the cement of 1:0.4:1. The invention also discloses a preparation method of the piezoelectric sensor, a beam type concrete sensor comprising the piezoelectric sensor and application thereof. The piezoelectric sensor is stable in signal, high in signal to noise ratio, small in road surface damage degree, high in durability, simple in preparation process and low in cost. The beam type concrete sensor is simple in preparation, adjustable in volume, high in sensitivity, high in response speed, insusceptible to damage during construction; and the calculated running speed of a vehicle is basically consistent with the actual running speed of the vehicle, the measuring result is accurate and the error is small.

Description

technical field [0001] The invention relates to a piezoelectric sensor and a beam-type concrete sensor and a preparation method and application thereof, in particular to a piezoelectric sensor and a beam-type concrete sensor for traffic flow monitoring and vehicle speed measurement and a preparation method and application thereof. Background technique [0002] With the rapid development of our country's economy, our country's expressways are also realizing continuous, rapid and orderly development. However, with the rapid development of my country's highway traffic, the number of different types of traffic vehicles is also increasing day by day, and the subsequent transportation problems are becoming more and more prominent. Various violations such as overloading and speeding have increased, and traffic accidents have occurred frequently. The deteriorating traffic environment has posed a great threat to people's lives and property safety, and has gradually evolved into a very...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L41/053H01L41/22G01P3/66H10N30/88H10N30/02
Inventor 黄世峰徐东宇王志常钧叶正茂秦磊李宗津程新
Owner UNIV OF JINAN
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