Pressure transducer for use with any one of a series of detachable pressure domes of similar construction.,申请号EP19850114027-传众专利搜索

Pressure transducer for use with any one of a series of detachable pressure domes of similar construction.

申请公布号：EP0180954(A2)

申请号：EP19850114027

申请日期：1985.11.05

申请公布日期：1986.05.14

申请人：

HEWLETT-PACKARD COMPANY

发明人：MERRICK, EDWIN B.;STEPHENS, THOMAS P.

分类号：G01L9/00;A61B5/0215;G01L9/04;G01L19/04;(IPC1-7):G01L19/04

主分类号：G01L9/00

摘要：<p>The temperature coefficient of the combination of a transducer (T) and any one of a plurality of disposable plastic domes (D) manufactured to given specifications is reduced substantially to zero by making the temperature coefficient of the transducer (T) when the pressure dome (D) is not mounted therto equal in magnitude and opposite in sign to the change in temperature coefficient that results from mounting the average dome (D) to the transducer (T). The temperature coefficient of the transducer (T) is permanently adjusted by laser trimming a temperature-dependent resister (Rx, RT) of a bridge circuit (RA. RB, RC, RV, RT, Rx. Ry) coupled to be imbalanced by variations in a pressure sensitive impedance (Z) of the transducer (T).</p>