| 摘要 |
PURPOSE: An alarm device sensing approach of an object is provided to prevent a crime by operating a buzzer and driving a start motor automatically by sensing approach of the object with a switch. CONSTITUTION: Approach sensors(12,14,16,18) are installed to all directions to sense approach of an object. A switch(20) provides power to the approach sensors to operate the sensors. The approach sensors have contact points(90,100) turning on when an approaching object is sensed in twenty and ten meters respectively. Signals outputted from contact points are inputted to a first OR gate(60) and a corresponding terminal of an ECU(Electronic Control Unit,80) having a second OR gate(70). The output signal of the first OR gate operates a buzzer(30). The output signal of the second OR gate controls a start relay(40) operating a start motor(50).
|
