期刊
SENSORS AND ACTUATORS A-PHYSICAL
卷 276, 期 -, 页码 165-175出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.sna.2018.04.014
关键词
Pressure sensor; PVDF; Current-mode processing; Schmitt comparator; Simulation; Experimental results
资金
- Ministry of Education, Science and Technological Development of the Republic of Serbia [OI 172,057, 42009]
- NSF CREST [HRD-0833184]
- NASA [NNX09AV07A]
- NSF-PREM [1523617]
This paper introduces new electronic sensor circuits based on the usage of a piezoelectric Polyvinylidene fluoride-PVDF pressure detector coupled with a current-mode instrumentation amplifier, Schmitt comparator, and only grounded resistors. Pressure/force is measured in terms of the charge generated by the PVDF element as a result of the direct piezoelectric effect. The experimental test results demonstrated that the dynamic pressure response, the sensitivity and linearity of the designed sensor were higher than the sensitivity and linearity of a traditional piezoelectric sensor. The sensitivity of the PVDF sensor was 0.08 mV/Pa. The detector is calibrated over a frequency range of 1 Hz-1 kHz. The proposed signal conditioning electronics offer a potential for future miniaturization in order to be integrated with different commercial devices, for detecting certain tiny activities including finger movements, robotics and smart electronic devices. (C) 2018 Elsevier B.V. All rights reserved.
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