1. THE ULTRASONIC DISTANCE ALARM SYSTEM BASED ON
MSP430F449
ABSTRACT:
The principle ultrasonic distance measurement was introduced. Using Texas
Instrument's micro controller MSP430F449 and ultrasonic sensor TCT40-16F, an ultrasonic
measurement and alarm system with high precision was designed. Adopting the method of
MJ echo capture, the system can measure the distance well and truly, and can send the realtime distance data to the LCD screen of system. Once the distance was less than the setting
value, the system would alarm immediately. In addition, the system uses temperature sensor
for temperature compensation, which effectively improves the ranging accuracy.
Experimental results show that the system has high range accuracy, and can complete the
distance measuring task in cars.