OPTICAL AXIS CONTROL DEVICE

• Main Authors: FUKUNAGA TAKAO, OSAWA TAKASHI
• Format: Patent
• Language: English; Japanese
• Published: 10.06.2021
• Subjects: ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING ORSUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES INGENERAL; GYROSCOPIC INSTRUMENTS; MEASURING; MEASURING DISTANCES, LEVELS OR BEARINGS; NAVIGATION; PERFORMING OPERATIONS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY; PHYSICS; SURVEYING; TESTING; TRANSPORTING; VEHICLES IN GENERAL

To reduce influence by a fluctuation component by squat or the like and a fluctuation component by nose dive in calculation of a road surface inclination angle for static type auto-leveling control, and improve optical axis control accuracy.SOLUTION: An optical axis control device 100 includes: a first inclination angle calculation part 21 for calculating a road surface inclination angle θ1 of a vehicle part inclined in a pitch direction using an acceleration signal output by an acceleration sensor 2 in a vehicle 1; and a travel state determination part 12 for determining whether or not a travel state of the vehicle 1 is in a first travel state and determining whether or not the travel state is in a second travel state. The first travel state includes a uniform travel state, and the second travel state includes an acceleration start state and a deceleration start state. The first inclination angle calculation part 21 calculates a road surface inclination angle θ1 using an acceleration signal in the first travel state (first acceleration signal) and an acceleration signal in the second state (second acceleration signal) when the travel state is changed from the first travel state to the second travel state.SELECTED DRAWING: Figure 1 【課題】スタティック式オートレベリング制御用の対路面傾斜角度の演算において、スクワット等による変動成分及びノーズダイブによる変動成分による影響を低減して、光軸制御精度を向上する。【解決手段】光軸制御装置１００は、車両１における加速度センサ２により出力された加速度信号を用いて、ピッチ方向に傾く車体部の対路面傾斜角度θ１を演算する第１傾斜角度演算部２１と、車両１の走行状態が第１走行状態であるか否かを判断するとともに、走行状態が第２走行状態であるか否かを判断する走行状態判断部１２と、を備え、第１走行状態は、等速走行状態を含み、第２走行状態は、加速開始状態及び減速開始状態を含み、第１傾斜角度演算部２１は、走行状態が第１走行状態から第２走行状態に変化したとき、第１走行状態における加速度信号（第１加速度信号）及び第２走行状態における加速度信号（第２加速度信号）を用いて対路面傾斜角度θ１を演算する。【選択図】図１