| 摘要 |
<p>PURPOSE:To easily detect the distance to an obstacle in accordance with the running speed, by controlling the detecting signal radiated output by the voltage according to the running speed of a car. CONSTITUTION:The voltage according to the running speed of a car 1 is generated by the generator 6, etc. rotating in accordance with the speed of the running car 1, the voltage is made bias voltage to operate the generated output controller 5, and the quantity of light generated from the light beam emitting device 2 is adjusted. And the quantity of light in a fixed amount, which is reflected when the emitted light beam is hit against the obstacle such as a preceding car, etc. is detected by the modulated wave detector 11 through the photodetecting device 3, by which the distance to the obstacle is detected and the alarm 13, etc. are operated.</p> |
