국내 최대 기계 및 로봇 연구정보

기술보고서

기술보고서 게시판 내용
타이틀	PRACTICAL APPLICATIONS OF CURRENT LOOP SIGNAL CONDITIONING
저자	Karl F. Anderson
Keyword	Measurements; Resistance; Strain; Signal conditioning
URL	http://www.dfrc.nasa.gov/DTRS/1994/PDF/H-1991.pdf
보고서번호	SPIE
발행년도	1994
출처	NASA Dryden Flight Research Center
ABSTRACT	This paper describes a variety of practical application circuits based on the current loop signal conditioning paradigm. Equations defining the circuit response are also provided. The constant current loop is a fundamental signal conditioning circuit concept that can be implemented in a variety of configurations for resistance-based transducers, such as strain gages and resistance temperature devices. The circuit features signal conditioning outputs which are unaffected by extremely large variations in lead wire resistance, direct current frequency response, and inherent linearity with respect to resistance change. Sensitivity of this circuit is double that of a Wheatstone bridge circuit. Electrical output is zero for resistance change equals zero. The same excitation and output sense wires can serve multiple transducers. More application arrangements are possible with constant current loop signal conditioning than with the Wheatstone bridge.