The design and fabrication of a piezoelectric sensor which can be used for various pressure measurement applications is discussed. The sensor is 42 mm×19 mm×2 mm, with the piezoelectric film thickness alone being 52 μm. The sensor is rugged and inexpensive, and it operates with simple, power-efficient electronics. The circuitry used and the problems involved in taking pressure measurements under the bony prominences of the foot are discussed. A major problem is that the sensor does not respond to steady pressures
The authors have characterized the performance of the commercially available Interlink pressure sensor. The sensor costs less than $1. It is 0.25-mm thick, is light and flexible, and can be customized for a wider range of applications. The resistance-versus-pressure characteristic of the sensor is logarithmic. The operating range is from 0 to 2 MPa. The hysteresis is 8% and the nonrepeatability is less than 7% of full scale. The temperature drift is -0.5%/ degrees C of full scale. Using the Interlink sensors and electronics, the authors developed a portable data acquisition system to monitor the pressure under the bony prominences of the feet during normal gait. The advantages and drawbacks of the sensor are indicated.<>
Jacqueline J Wertsch合作论文数Milwaukee2
Willis J. Tompkins合作论文数Department of Biomedical Engineering, College of Engineering, University of Wisconsin-Madison;Department of Electrical and Computer Engineering, College of Engineering, University of Wisconsin-Madison2
John Webster合作论文数Department of Biomedical Engineering, College of Engineering, University of Wisconsin2
P Bachyrita合作论文数1H Zhu合作论文数1
Nabil Maalej合作论文数University of Wisconsin;Medical School;Medical School, University of Wisconsin1
