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Arrangement method of piezoelectric ultrasonic sensor and application of piezoelectric ultrasonic sensor in omnibearing online monitoring of cement concrete hydration process

A cement concrete, piezoelectric ultrasonic technology, applied in the direction of using sonic/ultrasonic/infrasonic for material analysis, sonic/ultrasonic/infrasonic analysis of solids, instruments, etc. Very good and other problems to achieve the effect of eliminating monitoring errors

Active Publication Date: 2021-02-02
UNIV OF JINAN
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003]However, there is no good online monitoring method to monitor the hydration process of the cement concrete mixing system in an all-round way. Most of the existing monitoring methods have samples Due to the shortcomings of less data and less monitoring area, the obtained data is not very convincing
[0004] Ultrasonic has the advantages of high energy, strong penetrating ability, and good directionality. It has been widely used in concrete strength testing, crack and hole testing, etc., but how to use it There is no good way to realize the all-round online monitoring of cement concrete hydration process by ultrasonic

Method used

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  • Arrangement method of piezoelectric ultrasonic sensor and application of piezoelectric ultrasonic sensor in omnibearing online monitoring of cement concrete hydration process
  • Arrangement method of piezoelectric ultrasonic sensor and application of piezoelectric ultrasonic sensor in omnibearing online monitoring of cement concrete hydration process
  • Arrangement method of piezoelectric ultrasonic sensor and application of piezoelectric ultrasonic sensor in omnibearing online monitoring of cement concrete hydration process

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Embodiment 1

[0036] A real-time and comprehensive online monitoring system for cement concrete hydration, the system includes a sensor and a module for transmitting, receiving, processing and analyzing the sensor signal. The sensor adopts the layout method of my country's Beidou satellite, wherein the spherical piezoelectric ultrasonic sensor is used as the transmitting sensor, and the spherical piezoelectric ultrasonic transmitting sensor is used as the center of the sphere, and a plurality of sensors are arranged on one or more spherical surfaces around it. A piezoelectric ultrasonic receiving sensor that receives ultrasonic waves. The spherical piezoelectric ultrasonic sensor is defined as a star sensor, and each piezoelectric ultrasonic receiving sensor distributed spherically around it is defined as a satellite sensor. According to the distance between the satellite sensor and the center of the sphere, all satellite sensors on the same sphere as the star sensor can be collectively refe...

Embodiment 2

[0043] When monitoring the internal hydration of large-scale concrete, it is necessary to design and build a sensor system on site according to the actual situation according to the idea of ​​the present invention. In the laboratory research, because the concrete scale is not large, the situation is similar. Every time the sensor system is built on site, the operation is cumbersome, the repeatability is low, and the work efficiency is low. Therefore, the present invention provides a cement concrete hydration comprehensive monitoring device suitable for small-scale laboratory research. The position is fixed with a spherical piezoelectric ultrasonic sensor, and a plurality of piezoelectric ultrasonic receiving sensors are fixed around the spherical piezoelectric ultrasonic sensor, and the piezoelectric ultrasonic receiving sensors are spherically distributed with the spherical piezoelectric ultrasonic sensor as the center of the sphere. The piezoelectric ultrasonic receiving sen...

Embodiment 3

[0049] Using Example 2 figure 2 The cement concrete hydration comprehensive monitoring device shown in the figure monitors the concrete hydration condition. Among them, the container used is a square, the size is 60cm*60cm*60cm, the piezoelectric element of the spherical piezoelectric ultrasonic transmitting sensor used is spherical piezoelectric ceramics or piezoelectric composite materials, the polarization direction is along the diameter of the spherical wall, and the electrode surfaces are respectively inside and outside Surface, its resonant frequency is 30-150kHz. The number of piezoelectric ultrasonic receiving sensors surrounding the spherical piezoelectric ultrasonic transmitting sensor is 10. The piezoelectric element of the piezoelectric ultrasonic receiving sensor used is a strip-shaped piezoelectric composite material, and the polarization direction is along the thickness of the piezoelectric element. direction. The spherical piezoelectric ultrasonic transmitti...

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Abstract

The invention discloses an arrangement method of a piezoelectric ultrasonic sensor and application of the piezoelectric ultrasonic sensor in omnibearing online monitoring of a cement concrete hydration process. A spherical piezoelectric ultrasonic sensor is used as a transmitting sensor for transmitting an ultrasonic signal, the spherical piezoelectric ultrasonic sensor is used as a sphere center,and a plurality of piezoelectric ultrasonic receiving sensors for receiving ultrasonic waves are arranged on one or more spherical surfaces around the piezoelectric ultrasonic receiving sensors. Thesensors are arranged by referring to the layout of a Beidou satellite system in China and adopting the design thought of transmitting signals at 360 degrees in the center and receiving signals at 360degrees around, so that the reliability of hydration process monitoring of cement concrete in different directions and at different angles is improved, monitoring errors caused by anisotropy in the cement concrete hydration monitoring process are eliminated, omnibearing real-time online monitoring of the cement concrete hydration process is achieved, and the method is suitable for long-term real-time online monitoring of cement concrete hydration.

Description

technical field [0001] The invention relates to a layout method of a piezoelectric ultrasonic sensor, and also relates to a method for real-time and omnidirectional online monitoring of cement concrete hydration process by using the layout method, belonging to the technical field of cement concrete quality monitoring. Background technique [0002] The hydration of cement concrete is a complex chemical reaction process, which has different hydration characteristics in different hydration stages. In order to ensure the excellent engineering performance of concrete, it is necessary to monitor the hydration characteristics of cement concrete in different parts and directions in real time. , and a series of changes in chemical, physical and physicochemical properties caused by cement hydration. It is precisely because the hydration of cement concrete is instantaneous, the acoustic parameters of different hydration stages are different, and the hydration of different positions ins...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N29/04G01N29/22G01N29/24
CPCG01N29/04G01N29/223G01N29/2437G01N29/245G01N29/2475G01N2291/103G01N2291/0232
Inventor 徐东宇李浩然张秀芝徐笃军李珍胡燕程新
Owner UNIV OF JINAN
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