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Improved Encapsulation Method of Sensing Element for Cement-Based Piezoelectric Sensor

ISSN号：1006-4982
期刊名称：《天津大学学报：英文版》
时间：0
分类：TP212[自动化与计算机技术—控制科学与工程;自动化与计算机技术—检测技术与自动化装置]
作者机构：[1]School of Civil Engineering, Tianjin University, Tianjin 300072, China, [2]Department of Civil Engineering, The Hong Kong University of Science and Technology, KLN, Hong Kong, China
相关基金：Supported by Hong Kong Research Grant Council to HKUST under grant HKUST 6212/02E and National Science Fund for Distinguished Young Scholars of China（ No. 50425824）.

关键词：封装技术, 压电传感器, 并联模型, 传感元件, improved encapsulation method , cement-based , piezoelectric sensor , parallel model

中文摘要：

为在土木工程结构使用的一个 cement-basedpiezoelectric 传感器的一个察觉到的元素的一个改进封装方法被开发，一些测试为验证这个方法被执行。这种类型的基于水泥的压电的传感器主要由于它与水泥的相容性在具体结构被使用，并且它的察觉到的元素的封装方法对从水泥的压力的转移的有效性和精确性重要到察觉到的元素。传感器“以前的封装方法的 s 测量错误，它由封装材料和幼仔的固有的差别的区域被导致”在水泥和封装材料之间的 s 模量，用平行理论上被分析模型。在改进方法，错误被减少最小化封装材料的区域并且在传感器中改变水泥和压电的材料的配置。以前的 and 成为改进方法的 Twosensors 分别地在二棱柱被嵌入，棱柱在材料测试系统上被压缩。通过二个传感器的测量错误的比较，改进方法被评估。测试结果证明改进封装方法有效、可行。

英文摘要：

An improved encapsulation method of a sensing element for a cement-based piezoelectric sensor used in civil engineering structure was developed and some tests were carried out for validating this method. The cement-based piezoelectric sensor of this kind is mainly used in concrete structure due to its compatibility with concrete, and the encapsulation method of its sensing element is important to the effectiveness and accuracy of the transfer of the stress from concrete to the sensing element. The sensor＇s measurement error of the previous encapsulation method, which was induced by the area of the encapsulation material and the inherent difference of Young＇s modulus between cement and encapsulation material, was analyzed theoretically using parallel model. In the improved method, the error is minimized by decreasing the area of the encapsulation material and changing the configuration of the cement and piezoelectric material in the sensor. Two sensors made by the previous and improved methods were embedded in two prisms respectively and the prisms were compressed on Material Test System. Through the comparison of the measurement errors of the two sensors, the improved method was evaluated. The test results show that the improved encapsulation method is effective and feasible.

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