JPS6378702U - - Google Patents
Info
- Publication number
- JPS6378702U JPS6378702U JP17355486U JP17355486U JPS6378702U JP S6378702 U JPS6378702 U JP S6378702U JP 17355486 U JP17355486 U JP 17355486U JP 17355486 U JP17355486 U JP 17355486U JP S6378702 U JPS6378702 U JP S6378702U
- Authority
- JP
- Japan
- Prior art keywords
- valve
- stem
- signal
- displacement
- upper limit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000006073 displacement reaction Methods 0.000 claims 3
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Servomotors (AREA)
Description
第１図は本考案の１実施例を示すブロツク図、
第２図は第１図における変位−電気信号変換器の
特性を示す特性図である。
１２……入力処理手段、１３……差動増幅器、
１４……フラツパ、１５……アクチユエータ、１
６……ノズル、１７……パイロツトリレー、１８
……バルブ、１９，２１……変位−電気信号変換
器、２２……比較器、２３……駆動回路。
FIG. 1 is a block diagram showing one embodiment of the present invention.
FIG. 2 is a characteristic diagram showing the characteristics of the displacement-electrical signal converter in FIG. 1. 12...Input processing means, 13...Differential amplifier,
14...Flatspa, 15...Actuator, 1
6... Nozzle, 17... Pilot relay, 18
... Valve, 19, 21 ... Displacement-electrical signal converter, 22 ... Comparator, 23 ... Drive circuit.
Claims (1)
電流に対応させて制御するための電空ポジシヨナ
において、前記入力電流を内部での信号処理に適
する電気信号に変換する入力処理手段と、この入
力処理手段の出力と帰還信号との差に基づいて前
記バルブを駆動するパイロツトリレーのフラツパ
を制御するアクチユエータ手段と、前記バルブの
ステム変位を入力して前記電気信号の形として前
記帰還信号を得る変位／電気信号変換手段と、前
記バルブの上限を与える上限電圧と前記ステムの
下限を与える下限電圧とが与えられこれらと前記
ステム変位に関連する電圧と比較する比較器とを
具備しこの比較器の出力から前記バルブが上限或
いは下限に達したことを知らせるようにしたこと
を特徴とする電空ポジシヨナ。 An electro-pneumatic positioner for controlling the stem position of a valve driven by pneumatic pressure in response to an input current, comprising: an input processing means for converting the input current into an electric signal suitable for internal signal processing; and the input processing means. actuator means for controlling a flapper of a pilot relay for driving said valve based on the difference between the output of said valve and a feedback signal; and displacement/electrical means for inputting said valve stem displacement to obtain said feedback signal in the form of said electrical signal. comprising a signal converting means and a comparator which is provided with an upper limit voltage giving an upper limit of the valve and a lower limit voltage giving a lower limit of the stem and compares these with a voltage related to the stem displacement; An electropneumatic positioner characterized in that the valve is configured to notify that the valve has reached an upper limit or a lower limit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17355486U JPS6378702U (en) | 1986-11-12 | 1986-11-12 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17355486U JPS6378702U (en) | 1986-11-12 | 1986-11-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6378702U true JPS6378702U (en) | 1988-05-25 |
Family
ID=31111122
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17355486U Pending JPS6378702U (en) | 1986-11-12 | 1986-11-12 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6378702U (en) |
-
1986
- 1986-11-12 JP JP17355486U patent/JPS6378702U/ja active Pending