Communications: electrical – Land vehicle alarms or indicators – Of relative distance from an obstacle
Patent
1992-03-05
1993-11-09
Peng, John K.
Communications: electrical
Land vehicle alarms or indicators
Of relative distance from an obstacle
340903, 340436, B60Q 100
Patent
active
052606821
ABSTRACT:
A light-wave distance measuring apparatus has an intermittent controller for continuously changing periods of time during which a light intensity modulator 1 transmits and interrupts transmitting a light intensity modulated signal so as to avoid a synchronization of the light intensity modulated signal of the a first tranmitting apparatus with a light intensity modulated signal transmitted from a second light-wave distance measuring apparatus. The operation of the intermittent controller prevents a misfunction of the apparatus. Provisions of a self-speed detector, a time marker and a light transmission interval measuring circuit enables the apparatus to detect the speed of a target object. Thus, the apparatus is suitable for mounting on a vehicle. The apparatus operates accurately even when both the vehicle and the target object are moving. The apparatus also accurately operates without interference even when other similar light-wave distance measuring apparatus for vehicles are used in a small area.
REFERENCES:
patent: 4453825 (1984-06-01), Buck et al.
Iwasaki Kazuhisa
Kimura Shigeru
Kitamura Hideki
Omamyuda Yukio
Senoo Yasushi
Oda Christine K.
Peng John K.
Stanley Electric Co. Ltd.
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