Abstract: An auto anti-thief system employing a bluetooth technique is provided. The anti-thief system includes a system core processor, a bluetooth communication module, an anti-thief alarm control circuit, an indicator control circuit, a door lock initiator control circuit and a power voltage regulator circuit. When cooperating the present invention with the bluetooth communication module built in the mobile phone, it can reduce the loading of carrying the remote controller for the user. Moreover, through the frequency hopping used by the wireless channel of bluetooth, it will not be interfered easily. Furthermore, utilizing 128 bits to protect the encoding method, the security is more increased. Therefore, the present invention breaks through the unidirectional transmission employed by the conventional remote controller.

Abstract: A distance measuring and monitoring device equipped automobile reverse radar comprises: a photocoupler camera with a wide-angle lens installed at an automobile rear end for taking pictures of possible obstacles behind the automobile body; a distance measuring inductor for calculation of lateral distance between two lateral corners of the automobile body and an obstacle; and a power supply for supplying power to the photocoupler camera, the distance measuring inductor, and the display. The image of the obstacle is mirror-image processed, then forwarded to an image synthesizer for image synthesization, and transferred to a video processor and shown in a display. A reverse gear signal is the effective signal for triggering the power supply.

Abstract: A distance measuring and monitoring device equipped automobile reverse radar comprises: a photocoupler camera with a wide-angle lens installed at an automobile rear end for taking pictures of possible obstacles behind the automobile body; a distance measuring inductor for calculation of lateral distance between two lateral corners of the automobile body and an obstacle; and a power supply for supplying power to the photocoupler camera, the distance measuring inductor, and the display. The image of the obstacle is mirror-image processed, then forwarded to an image synthesizer for image synthesization, and transferred to a video processor and shown in a display. A reverse gear signal is the effective signal for triggering the power supply.