Abstract: The present invention discloses an antislipping device for cars in a stationary state, which is able to automatically hold the brakes of cars in a stationary state so as to prevent them from moving when stationed on inclined ground. The antislipping device for cars in a stationary state includes a tachometer for detecting the rotation of the car wheels and outputing signal which indicates if the car wheels are in a state of rotation or not; a hold device for preventing the brake pedal of the car from moving backward and holding on the brake pedal when the brake pedal is trodden down to stop the moving of the car; and a CPU electrically connected with the tachometer and the device, for receiving the output signal from the tachometer and conducting the hold device to release the brake pedal when the wheels of the car are kept still and the accelerator pedal of the car is trodden down to exceed a predetermined extent.

Abstract: This invention relates to an automatic control device adapted for preventing rear-end collision of a front motorized vehicle and a rear motorized vehicle running behind the front vehicle. The automatic control device for preventing rear-end collision according to this invention comprises: a microprocessor, a least one signal emitter, a speed detector, a least one signal receiver, a brake controller and an accelerator pedal controller, in which the at least one signal emitter is installed at the rear end of the front vehicle while the other comprising mechanisms are installed in the rear vehicle. The microprocessor couples separately with the signal emitter, the speed detector, the signal receiver, the brake controller and the accelerator pedal controller so as to transfer and process various signals.