| 摘要 |
PURPOSE:To perform adequate precaution for an obstacle at reverse movement of a car, by providing each transmitter-receiver in both sides of a car body front part and operating a transmitter-receiver, provided in a car body side at an opposite side to the steering direction, when a steering handle angle is at least a prescribed value. CONSTITUTION:Left and right transmitters TL, TR and left and right receivers RL, RR are provided in a front fender 31 of a vehicle 30. While a steering angle detector circuit 40 is constituted by connecting a variable resistor 41, resistors 42, 43 and battery 44 in series, and a resistance value of the variable resistor 41 is changed in accordance with rotation of a worm gear 51 of a handle post 50. A detecting signal of the circuit 40 is fed to a comparator 70. If a handle steering angle is decided to be a prescribed value or more by the detecting signal, the comparator 70 generates an output signal to a transmitter-receiver circuit in an opposite side to the steering direction to operate the transmitter- receiver. |
