Invention Grant
- Patent Title: Online sensor calibration for electrohydraulic valves
- Patent Title (中): 电动液压阀的在线传感器校准
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Application No.: US14105532Application Date: 2013-12-13
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Publication No.: US09383287B2Publication Date: 2016-07-05
- Inventor: Michael Berne Rannow
- Applicant: Eaton Corporation
- Applicant Address: US OH Cleveland
- Assignee: Eaton Corporation
- Current Assignee: Eaton Corporation
- Current Assignee Address: US OH Cleveland
- Agency: Merchant & Gould P.C.
- Main IPC: G01L27/00
- IPC: G01L27/00 ; G01B7/14 ; F15B19/00

Abstract:
An online method for reconfiguring pressure and position sensors in a hydraulic system is disclosed. In one step, a sensor drift condition, a recalibration request, or an unisolated fault condition is detected. In another step, a system pressure sensor or another sensor, such as a load-sense pressure sensor, is verified as a trusted master reference sensor. Another step includes measuring and recording a first pressure reading at the master reference sensor and first voltage readings associated with first, second, third, and fourth pressure slave sensors at a first pump pressure set point. Another step includes, repeating the previous step at a second pump pressure set point. A new gain and offset for each of the first, second, third, and fourth pressure sensors can be calculated based on a comparison of the recoded first and second pressure readings and the recorded first and second voltage readings.
Public/Granted literature
- US20140165692A1 ONLINE SENSOR CALIBRATION FOR ELECTROHYDRAULIC VALVES Public/Granted day:2014-06-19
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