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Design and Fabrication of Six-Degree of Freedom Piezoresistive Turbulent Water Flow Sensor
Dao, Dzung Viet,Toshiyuki, Toriyama,Wells, John C.,Susumu, Sugiyama 한국센서학회 2002 센서학회지 Vol.11 No.4
This paper presents the design concept, theoretical investigation, and fabrication of a six-degree of freedom (6-DOF) turbulent flow micro sensor utilizing the piezoresistive effect in silicon. Unlike other flow sensors, which typically measure just one component of wall shear stress ^[1,2], the proposed sensor can independently detect six components of force and moment on a test particle in a turbulent flow. By combining conventional and four-terminal piezoresistors in Si (111), and arranging them suitably on the sensing area, the total number of piezoresistors used in this sensing chip is only eighteen much fewer than the forty eight piezoresistors of the prior art piezoresistive 6-DOF force sensor ^[3].