Radar Based Cost Effective Vehicle Speed Detection Using Zero Cross Detection
Most of the modern systems use complex analysis and processing of output signals by using expensive digital
signal processors (DSP). In the present work, a novel method of zero-crossing detector (ZCD) algorithm for frequency
calculation is implemented. The output of the Doppler RADAR which is a sine wave is band-limited, amplified and then fed
to a ZCD. The output of the ZCD a Digital signal can be directly fed to the microcontrollers counter (T0 or T1) without the
use of an ADC. The microcontroller calculates and displays the speed. The algorithm proposed for vehicular speed detection
is a good platform than the other algorithms which are complex and Costly.