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Freely programmable position indicating apparatus
| Details |
Inventors: Muller, Fritz; Gaida, Gregor;
Assignee: Gebruder Muller Apparatebau GmbH & Co. KG (Ingelfingen, DE)
Primary Examiner: Lee; Kevin
Assistant Examiner:
Attorney, Agent or Firm: Feiereisen; Henry M.
A freely programmable position indicating apparatus, in particular for valves, includes a movable or rotatable adjusting member, a position detection unit operatively connected to the adjusting member for continuously generating an analog output signal commensurate with an actual position of the adjusting member. The analog output signal is transmitted to an electronic evaluation unit for determining the position indication. |
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DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS Throughout all the Figures, same or corresponding elements are generally indicated by same reference numerals.
Turning now to the drawing, and in particular to FIG.
1, there is shown a valve actuation device, generally designated by reference numeral 1 and including a movable adjusting member 3 which is received in a housing 2.
In the nonlimiting example of FIG.
1, the adjusting member 3 is utilized for application in a valve, such as a diaphragm valve, and formed by an actuating spindle 4 which is in forced engagement with a drive piston (not shown) that acts on a valve element, such as a valve diaphragm, which is also not shown for sake of simplicity.
In the illustrated example, the adjusting member 3 in the form of the actuating spindle 4 executes a stroke along a predetermined travel path starting from the open valve position to the closed valve position.
The adjusting member 3 may, optionally, also execute a rotational movement or a swinging movement.
Provided in the housing 2 immediately adjacent the adjusting member 3 is a position detection unit 5 which, in the nonlimiting example of FIG.
1, extends along the entire travel path of the adjusting member 3.
The position detection unit 5 is suitably designed as a linear potentiometer, and may be formed, for example, by a printed circuit board which is dimensioned as ohmic layer-type resistor.
The position detection unit 5 generates an analog output signal for detecting the respective position of the adjusting member 3.
In the event the position detection unit 5 is provided in the form of a linear potentiometer, the analog output signal is proportional to the amount of displacement of the member 3.
As shown in FIG.
1, the housing 2 accommodates a further printed circuit board 7 which supports an electronic evaluation unit 10.
The evaluation unit 10 includes a microprocessor 14 and a microswitch 11 which serves, for example, to initiate the programming of a freely programmable position indicating apparatus, generally designated by reference numeral 8 and shown in more detail in FIG
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