Headlight optical axis control apparatus
AssigneeMitsubishi Electric Corporation
InventorsTakashi Ohsawa, Wataru Tsujita
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Abstract
A headlight optical axis control apparatus calculates an inclination angle of a vehicle with respect to a road surface from a ratio of a difference between acceleration signals in the front-and-rear direction measured at two time points (kn, kn+1) to a difference between acceleration signals in the up-and-down direction measured at the two time points (kn, kn+1), the two time points being in the vicinity of a time when the attitude of a vehicle body becomes equivalent to a stationary state, in a period from a time when the travelling vehicle stops to a time when the vehicle body comes to a halt.
Claims6
A headlight optical axis control apparatus comprising a controller which calculates an inclination angle of a vehicle with respect to a road surface on a basis of acceleration signals in an up-and-down direction and in a front-and-rear direction, the acceleration signals being measured by an acceleration sensor mounted on the vehicle and which generates control signals to operate a headlight optical axis,
- wherein the controller calculates the inclination angle of the vehicle with respect to the road surface from a ratio of a difference between the acceleration signals in the up-and-down direction measured at two time points to a difference between the acceleration signals in the front-and-rear direction measured at the two time points, the two time points being selected from a period ranging from a time immediately before attitude of a vehicle body is identical to a stationary state to a time immediately after the attitude of the vehicle body is identical to the stationary state, from a time when the travelling vehicle stops to a time when the vehicle body comes to a halt.
Dependencies are inferred from the claim text.