| 摘要 |
<p>The present invention relates to an array type ultrasonic sensor for detecting a speed of a moving body or a vehicle, comprising: a first ultrasonic transceiver (10) which is located at one side of a driving path of a moving body, transmits an ultrasonic signal in the direction crossing the driving path of the moving body, and receives an ultrasonic wave reflected by the moving body; a second ultrasonic transceiver (20) which is disposed to be spaced from the first ultrasonic transceiver (10) at the other side of the driving path of the moving body, transmits the ultrasonic signal in the direction crossing the driving path of the moving body, and receives the ultrasonic wave reflected by the moving body; a signal amplification unit (30) for amplifying ultrasonic emission signals applied from a calculation control unit (40) to transmit the amplified ultrasonic emission signals to the first and second ultrasonic transceivers (10, 20), and amplifying ultrasonic reflection signals received from the first and second ultrasonic transceivers (10, 20); and the calculation control unit (40) for calculating the speed of the moving body by using the ultrasonic signals received from the signal amplification unit (30).</p> |
