Method for calibrating and/or correcting a display device having a needle, the needle being able to move in rotation about an axis of rotation
First Claim
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1. A method for calibrating and/or correcting a display device having a needle, the needle being able to rotate about an axis of rotation and the needle being driven by means of a stepping motor, the calibration method comprising the following steps:
- a first measurement of a first difference between a first value displayed by the needle and a first value to be displayed by the needle, a second measurement of a second difference between a second value displayed by the needle and a second value to be displayed by the needle, a third measurement of a third difference between a third value displayed by the needle and a third value to be displayed by the needle, a fourth measurement of a fourth difference between a fourth value displayed by the needle and a fourth value to be displayed by the needle, a computation of a correction value as a function of the first difference, the second difference, the third difference and the fourth difference, the correction value corresponding to a polynomial function of at least the third degree and calibrating and/or correcting the display device based on the correction value.
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Abstract
The present invention relates to a method for calibrating and/or correcting a display device having a needle, the needle being able to move in rotation about an axis of rotation and the needle being driven by means of a stepping motor, the calibration method including several measurements of differences between a value displayed and a value to be displayed, and a computation of a correction value as a function of the differences.
27 Citations
14 Claims
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1. A method for calibrating and/or correcting a display device having a needle, the needle being able to rotate about an axis of rotation and the needle being driven by means of a stepping motor, the calibration method comprising the following steps:
- a first measurement of a first difference between a first value displayed by the needle and a first value to be displayed by the needle, a second measurement of a second difference between a second value displayed by the needle and a second value to be displayed by the needle, a third measurement of a third difference between a third value displayed by the needle and a third value to be displayed by the needle, a fourth measurement of a fourth difference between a fourth value displayed by the needle and a fourth value to be displayed by the needle, a computation of a correction value as a function of the first difference, the second difference, the third difference and the fourth difference, the correction value corresponding to a polynomial function of at least the third degree and calibrating and/or correcting the display device based on the correction value.
- View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for calibrating and/or correcting a display device having a needle, the needle being able to rotate about an axis of rotation and the needle being driven by means of a stepping motor, the calibration method composing the following steps;
- a first measurement of a first difference between a first value displayed by the needle and a first value to be displayed by the needle, a second measurement of a second difference between a second value displayed by the needle and a second value to be displayed by the needle, a third measurement of a third difference between a third value displayed by the needle and a third value to be displayed by the needle, a computation of a correction value as a function of the first difference, the second difference and the third difference, the correction value corresponding to a sinusoidal function and calibrating and/or correcting the display device based on the correction value.
- View Dependent Claims (9, 10, 11, 12, 13, 14)
Specification