Low-cost impedance approach using AD5933 for sensing and monitoring applications

[摘要] The use of electro-materials such as piezoelectric, thermoelectric and pyroelectric has gained popularity due to their unique properties and can be deployed in a system for sensing and monitoring applications. Due to advancement in technology, Analog Devices has introduced in the market the first integrated impedance device, AD5933. The AD5933 is relatively inexpensive compared to an impedance analyzer such as HP 4192A, portable and has a 1MSPS sampling rate, fast enough for frequency sweeping. A sensing technique known as impedance approach has been commonly used to utilize the coupling property of the electromaterials by measuring their electrical impedance directly. The changes in the impedance response signals at certain frequencies can be used to detect changes in the integrity of a structure. However, there is still need for a feasibility study to investigate the use of low-cost impedance approach and it is necessary to carry out an experimental validation of a proposed system for sensing and monitoring applications.

[发布机构] Faculty of Architecture, Planning and Surveying, Universiti Teknologi MARA, Cawangan Sarawak, Kota Samarahan, Malaysia^1

[效力级别] 工业技术 [学科分类] 工业工程学

[关键词] Coupling properties;Electrical impedance;Experimental validations;Feasibility studies;Frequency sweeping;Impedance analyzer;Integrated impedance;Monitoring applications