| 摘要 |
The anti-theft system for cars has on the dashboard or under the floor a telescopic arm that can be engine-, motor- or hand-operated. The arm can be lifted and lowered. The lower end has a linkage with a cap that comes into contact with the ground. The system is corrosion-proof and when driven mechanically, the usual case, comes to a standstill through an infra red, laser beam or ultrasonic distance measurement unit after the cap reaches the ground, the pressure being measured by sensors. The raising and lowering of the arm is monitored by a camera under the engine hood. The windlass for hand-operation is used as an emergency measure. |
