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논문 기본 정보

자료유형
학술대회자료
저자정보
Jang-Sub Lee (Microinfinity Co.) Eun-Shil Yoo (Microinfinity Co.) Chi-Hyun Park (Microinfinity Co.) Jun-Eon An (Agency for Defense Development) Chan Gook Park (Seoul National University) Jin Woo Song (Seoul National University)
저널정보
제어로봇시스템학회 제어로봇시스템학회 국제학술대회 논문집 ICCAS 2014
발행연도
2014.10
수록면
874 - 878 (5page)

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In this paper, the design and fabrication techniques of a differential pressure sensor used in precision air data module (ADM) are described, and its performance test results are presented. A differential pressure senor for an ADM detects the differential pressure between static and total pressure, which can cover differential pressure of 0~20psi range with less than 1% accuracy. In order to satisfy these requirements, the piezoresistive Wheatstone bridge on the silicon diaphragm is used as a strain gauge. The p-type piezoresistors are implanted on the diaphragm under high doping concentration level for achieving smaller temperature sensitivity, and each resistor is designed to have same shape to compensate common errors. A constant current is applied to the bridge, which makes the temperature effects on piezoresistive coefficients and resistors compensate each other. The proposed differential sensor is designed through FEM analysis in order to satisfy nonlinearity requirements for an ADM. The repeatability and nonlinearity of the sensor are less than 0.09% and 0.27%, respectively, and the pressure hysteresis is less than 0.63%, which contributes to the root sum square (RSS) accuracy of 0.69%.

목차

Abstract
1. INTRODUCTION
2. DESIGN OF PIEZORESISTORS AND DIAPHRAGM
3. FABRICATION AND PACKAGE DESIGN
4. EXPEREMENTAL RESULTS
5. CONCLUSIONS
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