Displacement amount measuring device

Details Displacement amount measuring device Displacement amount measuring device

2006-10-17

2006-10-17

Bui, Bryan (Department: 2863)

Data processing: measuring, calibrating, or testing

Calibration or correction system

Fluid or fluid flow measurement

C702S094000, C702S155000

Reexamination Certificate

active

07124045

ABSTRACT:
A disclosed device eliminates an error in a displacement amount measured value caused by changes over time in a characteristic of a displacement sensor, and can always maintain high accuracy of measurement. When a hydraulic valve, to which the displacement sensor is mounted, is positioned at predetermined positions, output signals from the displacement sensor are acquired as sample values. On the basis of the acquired sample values, a trend of changes over time in the characteristic of the displacement sensor is computed. Settings of a conversion table, which is used for displacement amount computation, are corrected in a direction along the computed trend of changes.

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patent: 2000-258109 (2000-09-01), None
patent: 2002-273642 (2002-09-01), None

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