Design of system hardware in ultrasonic distance measurement of large distance with 20 kHz ultrasonic
GUAN Yan-bin, HE Xi-ping*, FAN An-cang,He long
(College of Physics and Information Technology, Shaanxi Normal University, Xi′an 710062, Shaanxi, China)
Abstract:
The ultrasonic distance measurement system which applied to extend the measure distance is studied with the theory analysis and experiment test. This article adopts an ultrasonic transducer of 20 kHz, studies the theory and designs circuit which enhance transmission power, optimize circuit matching, improve sensitivity of receiving signal. The experiment result shows that the performance of hardware circuit is content with the ultrasonic distance measurement system
KeyWords:
ultrasonic transducer; power amplification circuit; operational amplifier
