THERMAL MASS FLOW SENSOR WITH IMPROVED RESPONSE ACROSS FLUID TYPES
摘要
<p>One embodiment of the present invention comprises a mass flow controller. The mass flow controller may comprise a pair of thermal sensing elements, a bridge circuit adapted to receive at least one first signal from the pair of thermal sensing elements and a differential amplifier adapted to (i) receive at least one bridge signal from the bridge circuit, and (ii) emit an output signal generally proportional to a flow rate of fluid passing through the mass flow controller. The mass flow controller is also comprised in one embodiment of a filter portion of a control module having one or more first filters comprising substantially permanent parameters adapted to provide a more accurate output signal for a baseline fluid upon a change in the flow rate and one or more second filters comprising variable parameters, with each of the one or more second filters being adapted to provide a more accurate output signal for non-baseline fluids upon a change in the flow rate.</p>
申请公布号
WO2011008859(A1)
申请公布日期
2011.01.20
申请号
WO2010US41977
申请日期
2010.07.14
申请人
ADVANCED ENERGY INDUSTRIES, INC.;SMIRNOV, ALEXEI, V.;WESTRA, MICHAEL, LYNN;WINDENER, DEMITRI, DAX