Patent ID: 6909962
Filing Date: 2005-06-21
Classification: G08G

Abstract:
1. A traffic safety caution apparatus having the function for distinguishing the running direction of vehicles, including a transmitter and a receiver: said transmitter including a power supply; a vehicle detect enabling means connecting with the power supply for controlling the on/off state of the power supply and of respective portions of the transmitter based on the detected noise signal from a vehicle; a stereo frequency-modulation (FM) receiving meant for receiving an input speech signal; a speech recording/reproducing means operably coupled with an output channel of the stereo FM receiving means; an FM amplifying transmitting means for transmitting an FM signal; a stereo encoding means operably coupled to the FM amplifying transmitting means; an ultrasonic transmitting head for transmitting an ultrasonic wave; an ultrasonic frequency stabilization oscillating means operably coupled to the ultrasonic transmitting head; and said receiver including a stereo frequency-modulation (FM) receiving means ( a set of analog switches ( a speech recording/reproducing means ( a remote control receiving means ( a remote control decoding means ( a quad-latch ( a resistor array ( an ultrasonic receiving head ( an ultrasonic frequency selective amplifying means ( a frequency-voltage converting means ( a reference voltage generator ( a processor ( a power amplifying speaker ( wherein an output channel of the stereo FM receiving means (