Method for operation of an actuating drive
A technology of driving device and adjusting mechanism, applied in valve device, control using feedback, valve operation/release device, etc., can solve the problems of expensive use of variable capacitors, high power consumption, and excessively expensive electronic devices.
Inactive Publication Date: 2008-10-29
ABB (SCHWEIZ) AG
View PDF2 Cites 1 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
The use of variable capacitors is very expensive, since complex protective measures against moisture must be involved here and also very precise mechanical bearings are required
The use of differential transformers is disadvantageous due to the expensive mechanical support, since the transverse movement of the magnets in the coils must be suppressed
In addition, the necessary electronics corresponding to the supply are too expensive and have a relatively high power consumption
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0018] exist figure 1 A process valve 2 is installed in a pipeline 1 of a partial representation of a process plant not further described in FIG. The process valve 2 has in its interior a closing body 4 interacting with a valve seat 3 for controlling the quantity of process medium 5 flowing through. The closing body 4 is linearly actuated by an adjusting drive 6 via a lifting rod 7 . The actuating drive 6 is connected to the process valve 2 via a yoke 8 . A position regulator 9 is provided on the yoke 8 . The raising and lowering of the lifting rod 7 is reported to the position regulator 9 via a position receiver 10 . The detected lift is compared in the regulating unit 18 with the setpoint value delivered via the communication interface 11 and the actuating drive 6 is controlled as a function of the determined regulating deviation. The regulating unit 18 of the position controller 9 has an I / P converter for converting the electrical regulating deviation into an equivalent...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
An exemplary method is disclosed for operation of an actuating drive for control of an actuating element, which has an associated position detection device for detection of an actual position of the actuating element, which detection device is operatively connected to a regulator unit for comparison of the actual position with a predeterminable set position and for production of an actuating signal for driving the actuating drive, with the position detection device having a stationary optical scanning device whose optical axis is directed at an endless pattern which can be scanned optically and has associated numerical equivalents.; The method includes: while setting up the actuating drive, moving the actuating element to a first limit position, and associating an instantaneous pattern at a focus of a scanning device with an actual position of the first limit position; moving the actuating element to a second limit position, and associating the instantaneous pattern at the focus of the scanning device with an actual position of the second limit position; and comparing numerical equivalents of the instantaneous patterns identified at the first and second limit positions with one another.
Description
technical field [0001] The invention relates to a method for operating an adjusting drive for actuating an automation-related adjusting mechanism in a process plant. Background technique [0002] Such an actuating drive is equipped with an actuating device which compares the current actual position of the actuating mechanism with a set setpoint position and controls the actuating drive in such a way that the actual position changes compensatingly in the direction of the set setpoint position . The actuating drive therefore has a position sensor device which reports the current actual position of the actuating mechanism to the actuating device. [0003] A method is known from DE 4239635 A1 for displacement detection of valve stem movements in an electrical position regulator, in which a high-frequency oscillation in an LC resonant circuit is excited in an inductively operating sensor for generating high-frequency electromagnetic An alternating field, which is attenuated in ...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): G05D3/12F16K31/00
CPCF16K31/126F16K37/0041
Inventor F·马克斯W·舒尔茨
Owner ABB (SCHWEIZ) AG