Zero-Point Correction Apparatus and Method for an Angular Speed Sensor
First Claim
1. A zero-point correction apparatus of an angular speed sensor provided in a mobile body, comprising:
- detection means for detecting a standstill state of the mobile body;
calculation means for calculating an average value of output values of the angular speed sensor during the standstill state; and
correction means for correcting a zero point of the angular speed sensor to the average value.
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Abstract
An angular sensor (10) is provided in a mobile body. A first setter (14) performs determination regarding the standstill state on the basis of whether or not the variation width of the angular speed is less than or equal to a predetermined value. A standstill determiner (20) determines whether or not the standstill state has continued beyond a determination time. An n−i sum-total averaging unit (34) calculates a sum-total average of (n−i) number of pieces of data obtained by excluding, from n number of pieces of data input during a period determined as a continuation of the standstill state, i number of pieces of data that are output immediately before the end timing of the period, and determines it as a zero-point offset. A zero-point corrector (36) performs the zero-point correction of the output value of the angular speed sensor (10), and outputs the corrected value to an output unit (28).
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Citations
14 Claims
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1. A zero-point correction apparatus of an angular speed sensor provided in a mobile body, comprising:
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detection means for detecting a standstill state of the mobile body; calculation means for calculating an average value of output values of the angular speed sensor during the standstill state; and correction means for correcting a zero point of the angular speed sensor to the average value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A zero-point correction method of an angular speed sensor provided in a mobile body, comprising:
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determining whether the mobile body is in a standstill state; calculating an average value of output values of the angular speed sensor during the standstill state; and correcting a zero point of the angular speed sensor to the average value.
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14. A zero-point correction apparatus of an angular speed sensor provided in a mobile body, comprising:
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a detector that detects a standstill state of the mobile body; and a controller that calculates an average value of output values of the angular speed sensor during the standstill state and corrects a zero point of the angular speed sensor to the average value.
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Specification