METHODS AND APPARATUS TO DETERMINE A POSITION OF A VALVE
摘要
Methods and apparatus to indicate a position of a valve (100) are described. An example apparatus includes a first pressure sensor (104) to detect an inlet, pressure of a valve, a second pressure sensor (106) to detect an outlet pressure of the valve, and a controller (126) operatively coupled to the first pressure sensor and the second pressure sensor to determine a position of the valve corresponding to one of a plurality of predetermined operational states of the valve.
申请公布号
WO2008156997(A1)
申请公布日期
2008.12.24
申请号
WO2008US65391
申请日期
2008.05.30
申请人
FISHER CONTROLS INTERNATIONAL LLC;ZHUANG, YIN;CANG, LU;JUN, FAN, JIAN