|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||251/12904 ; 137/486 ; 137/4875|
|발명자 / 주소|
|출원인 / 주소|
|인용정보||피인용 횟수 : 3 인용 특허 : 0|
The safety of control may be secured by decreasing error in the valve position detection to increase the accuracy of flow control and stopping the control function when the valve is in an abnormal condition, so as to prevent any malfunction. The valve position is controlled so that the valve opening rate may correspond with the intended opening rate. When judgement is made to determine that said valve opening rate corresponds with the full-closed position, an output signal produced by the means for detecting the valve displacement when the valve is in th...
A control device for a valve comprising; means for storing a signal corresponding to the displacement of the valve at a full-closed position thereof; means for outputting a signal corresponding to an intended opening displacement of the valve, means for detecting displacement position corresponding to said opening displacement of the valve, means for controlling by feedback said valve position so that the valve opening displacement may correspond with the intended opening displacement, means for determining whether or not the valve opening displacement c...