Piezoelectric based resonant mass sensor using phase measurement |
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Authors: | K SureshG Uma BVMP Santhosh KumarU Varun Kumar M Umapathy |
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Affiliation: | Department of Instrumentation and Control Engineering, National Institute of Technology, Tiruchirappalli, Tamilnadu 620 015, India |
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Abstract: | The paper presents design, development and testing of a resonant sensor to measure mass in the range of 0-12 g. The sensor is built using cantilever structure with piezoelectric excitation, sensing and microcontroller based closed loop electronics. The sensor measures the unknown mass by measuring the shift in resonance frequency of the cantilever beam. The shift in resonance frequency for a change in mass is detected by measuring the phase difference between the piezoelectric sensor output and actuator input using microcontroller. The proposed measurement system is simple and accuracy is found to be ±1.2% of full scale deflection. |
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Keywords: | Resonant sensor Piezoelectric Mass measurement Phase detection Microcontroller |
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