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System for obtaining a velocity of a moving object from a speed sensor with an improved adjustment of a speed conversion coefficient
System for obtaining a velocity of a moving object from a speed sensor with an improved adjustment of a speed conversion coefficient
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机译:用于从速度传感器获得运动物体的速度并改进速度转换系数调节的系统
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摘要
A speed conversion coefficient calculating section 104 calculates a ratio of a GPS Doppler velocity calculated by a GPS velocity calculating section 101 to a vehicle speed measured by a speed sensor 102, thereby obtaining a speed conversion coefficient. There are provided a plurality of filtering sections 105-108 for averaging momently produced speed conversion coefficients. A filter selecting section 109 selects an optimum filtering section among these filtering sections 105-108. If a ratio of the speed conversion coefficient resultant from the speed conversion coefficient calculating section 104 to a presently adopted speed conversion coefficient is not within a predetermined range, an abnormality detecting & initializing section 110 notifies abnormality and initializes calculation process of the speed conversion coefficient in response to detection of such an abnormality.
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