One kind the main body of a book has been introduced uses the ultrasonic measurement human body or object altitude realization method, and the circuit designs the explanation having been in progress such as principle, monolithic machine software programming train of thought right away. Ultrasonic measures the tall implement and motion presses style to measure the tall implement being compared with each other, have the nothing touches , equipment carry-over small and exquisite easy to, measures advanced merit of accuracy, on also may apply to the production line as article altitude (thickness) monitoring , ultrasonic directing is strong , energy consumption is slow, the distance spreading is more distant , ultrasonic is often used for the obstruction range measurement therefore in medium. As can be achieved without ultrasonic measuring the distance the characteristics used in the human body or other objects height measurements will be very convenient, to readers in their daily life and production application has inspired guidance.
