Abstract
This paper ultrasonic distance meter designed for use in mid range measurement, With the market application value. The topic that based on the single chip research STC89C52 ultrasonic distance meter is make use of ultrasonic wave in the air velocity as the known, Measuring sound in a reflection back after launch to meet obstacles of the time, according to transmit and receive a lag between the time it takes to calculate the actual distance engine off-time eigenvalue obstacles. This paper introduces the design of the software and hardware ultrasonic distance meter and related alarm function. Ultrasonic distance meter main hardware and software two parts. Hardware part is the SCM system and display circuit, ultrasonic launching circuit and the ultrasonic receiving circuit, ring circuit, the power supply circuit component. Software is the main part of the program, ultrasonic happen subroutines, ultrasonic receiving subroutines and display subroutines components.
Key words ultrasonic ambulator microcontroller alarm
