Invention Grant
- Patent Title: Method for increasing the availability of displacement/position measuring systems on the basis of potentiometers with a slider tap
- Patent Title (中): 基于具有滑块水龙头的电位计增加位移/位置测量系统的可用性的方法
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Application No.: US12849568Application Date: 2010-08-03
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Publication No.: US08447555B2Publication Date: 2013-05-21
- Inventor: Stefan Tabelander , Thomas Kleegrewe , Andreas Wahlmann
- Applicant: Stefan Tabelander , Thomas Kleegrewe , Andreas Wahlmann
- Applicant Address: CH Zurich
- Assignee: ABB Technology AG
- Current Assignee: ABB Technology AG
- Current Assignee Address: CH Zurich
- Agency: Buchanan Ingersoll & Rooney PC
- Priority: DE102009036875 20090810
- Main IPC: G01C25/00
- IPC: G01C25/00

Abstract:
The disclosure relates to a method for increasing the availability of displacement/position measuring systems on the basis of potentiometers with a slider tap in a closed control loop, the controller of which is formed by a microcontroller which is supplied with the position of the slider via an analog/digital converter. At least part of the sensor range of the potentiometer is scanned on request by presetting a sequence of manipulated variables and an available control loop variable which represents the position value at a high sampling rate outside process tasks is recorded, to determine the exact position of a defective slider position of the potentiometer by evaluating the variable. The reference variable of the control loop is overloaded in a defined manner within the process task such that the defective slider position is passed over during the displacement/position measurement and an intact slider position is reached.
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