专利名称：Method and apparatus for nullifying
electrical offsets in a torsion sensor
发明人：Drutchas, Gilbert Henry,Borza, John Stanley申请号：EP88121840.8申请日：19881229公开号：EP0323640A3公开日：19900411
专利附图：
摘要：A method and apparatus is disclosed for nullifying electrical offsets present inan output signal from a torsion sensing device. The apparatus includes a detection circuitfor outputting an electrical signal when a change between a no applied torque condition
and an applied torque condition occurs in a member whose torsion is being monitored. Asample and hold circuit (48) measures the output signal from the torsion sensing device(42), the sample and hold circuit (48) being triggered in response to the detection circuit(46). A differencing circuit (70) subtracts the output of the sample and hold circuit (48)from a \"zero torque\" reference value and outputs an electrical signal having a valueindicative of the difference therebetween. An offset compensating circuit (74) iselectrically connected to the output of the differencing circuit (70) and to the torsionsensing device (42) and outputs a modified torsion sensing signal having a value thatvaries as a function of the applied torque offset by the value of the output of thedifferencing circuit (70).
申请人：TRW INC.
地址：1900 Richmond Road Lyndhurst Ohio 44124 US
国籍：US
代理机构：Leiser, Gottfried, Dipl.-Ing.
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