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Sensors 2013, 13(1), 611-625; doi:10.3390/s130100611
Article

Development of a Radial Pulse Tonometric (RPT) Sensor with a Temperature Compensation Mechanism

1
,
1,* , 1
,
1
 and
2
1 Advanced Medical Device Center, Korea Electrotechnology Research Institute, 111, Hanggaul-ro, Sangnok-gu, Ansan, Gyeonggi-do, 426-910, Korea 2 Korea Institute of Oriental Medicine, 486, Expo-ro, Yuseong-gu, Daejeon, 305-811, Korea
* Author to whom correspondence should be addressed.
Received: 2 November 2012 / Revised: 17 December 2012 / Accepted: 17 December 2012 / Published: 4 January 2013
(This article belongs to the Section Biosensors)
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Abstract

Several RPT sensors have been developed to acquire objective and quantitative pulse waves. These sensors offer improved performance with respect to pressure calibration, size and sensor deployment, but not temperature. Since most pressure sensors are sensitive to temperature, various temperature compensation techniques have been developed, but these techniques are largely inapplicable to RPT sensors due to the size restrictions of the sensor, and incompatibility between the compensation techniques and the RPT sensor. Consequently, in this paper a new RPT sensor comprising six piezoresistive pressure sensors and one thermistor has been developed through finite element analysis and then a suitable temperature compensation technique has been proposed. This technique compensates for temperature variations by using the thermistor and simple compensation equations. As verification of the proposed compensation technique, pulse waves of all types were successfully compensated for temperature changes.
Keywords: pulse diagnosis; FEM; pressure sensor; thermistor; temperature compensation pulse diagnosis; FEM; pressure sensor; thermistor; temperature compensation
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Yoo, S.-K.; Shin, K.-Y.; Lee, T.-B.; Jin, S.-O.; Kim, J.U. Development of a Radial Pulse Tonometric (RPT) Sensor with a Temperature Compensation Mechanism. Sensors 2013, 13, 611-625.

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