Speed trap detection with Doppler effect

In this paper, the 8-bit MC68HC11 MCU micro controller is used to receive data speed from Doppler radar speed sensor. Vehicle speeds are detected by Doppler radar speed sensor and then sent to a micro controller. The micro controller is programmed to detect the signal and calculate the speed of vehicle, display data on LCD, and concurrently send data to PC through RS-232 port via serial communication interface. The GUI for PC is developed with VB6 programming to receive data from micro controller and capture picture. VB6 is programmed to manual capture an image and also auto capture and auto save an image in directory if vehicle speed is over speed limit selected from micro controller. Also Microsoft's access database program is used to save/record data in a database.