Vehicle headlight optical axis control unit

Details Vehicle headlight optical axis control unit Vehicle headlight optical axis control unit

2007-02-20

2007-02-20

O'Shea, Sandra (Department: 2875)

Illumination

Supported by vehicle structure

Including headlamp beam measuring or indicating

C362S464000, C362S465000, C362S467000

Reexamination Certificate

active

10847389

ABSTRACT:
A headlight optical axis control unit of a vehicle capable of reducing cost, improving accuracy and ensuring safety is provided. An inclination angle detecting sensor placed in the front of a vehicle is connected to a control unit, and includes two transceivers of ultrasonic sensors. The two transceivers obtain the levels at their locations from the phase differences between the emitted waves and the reflected waves from a road surface, and measure the inclination angle from the level differences. The inclination angle is continuously detected during running of the vehicle. The measured values of the inclination angle are subjected to the cumulative sum and cumulative averaging. According to the average value, the control unit adjusts the angle of the optical axis of the headlights via headlight optical axis control sections.

REFERENCES:
patent: 6504265 (2003-01-01), Toda et al.
patent: 2003/0154792 (2003-08-01), Katayama
patent: 10-181424 (1998-07-01), None
patent: 11-105620 (1999-04-01), None
patent: 2000-233681 (2000-08-01), None

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