Research Of Tntelligent Warning System For Radar In Back Car

Now, human who has the automobile are getting more and more, brings the transportation hidden danger along with it to be also getting bigger and bigger, which often brought the great economic loss to drivers. To improve the safety of car parking, designed one kind to respond quickly, the reliability was high also a more economical automobile guards against hits the early warning system imperative.Using the ultrasonic wave distance measurement, one kind of back-draft intelligent alarm system which is based on MSP430F149 microcontroller as the control of the core is designed. The reversing radar system, which can recognize the speed of the vehicle and the barrier at the back of car when the vehicles reverse, and is capable of measuring the distance between the vehicle and obstacles, warned the drivers to brake at the way of sound and light at appropriate distance, before the collision occurred.Firstly, the article elaborated the supersonic sensor's principle and the characteristic. Regarding range measuring system's supersonic wave frequency, the number of pulse, the component model and so on main parameter has carried on the discussion.Secondly, the system design is proposed based on introducing the function of ultrasonic distance measurement system, and analyzed some of the hardware and software of car reversing warning system based on the ultrasonic distance. Hardware consists of ultrasonic transmitter and ultrasonic receiver circuit, temperature measurement circuit, speed measurement circuit, LCD display circuit, sound and light alarm circuit. Software part adopts concept of modularization design, the whole program includes main program, temperature routines, speed routines, display routines, alarm program modules. This article also analyzes the performance of the system, indicating the error cause and solution.Finally, the system debugging of the hardware and software was implemented at last. Experimental results showed that the measured data was accurate between 16 cm and 500 cm. Real-time displays of distance is realized with LCD in the system, and sound and light alarm and other functions. There are several additional advantages of the automobile back a car radar system, such as high integration, low cost and so on, which can meet the needs of drivers and reached design requirements. The study on this has certain theoretical value and practical value.