In the scan system is applied of ultrasonics transducer. The principle of its is to send a ultrasonic wave to an object and listens for the echo. The returning time of the echo is sent to calculate the distance based on the sound speed in air. This system can be used for detect the object in the radar system. We have invented the observation car for survey someplace where we cannot approach but we want to know what is there. We can send it go to there and watch the result on the monitor.Find Abstract
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CONTROL DC MOTOR CAR
In the scan system is applied of ultrasonics transducer. The principle of its is to send a ultrasonic wave to an object and listens for the echo. The returning time of the echo is sent to calculate the distance based on the sound speed in air. This system can be used for detect the object in the radar system. We have invented the observation car for survey someplace where we cannot approach but we want to know what is there. We can send it go to there and watch the result on the monitor.
