Semiconductor Pulse Laser Range Finder Hardware Circuit Design

In this paper ,we will attempt to solve the problem that the precision is low in the measurement of pulse LIDAR. We improve the precision by improving the precision of measurement about the TOF .In theory , we analyze the factor that influence the precision of time measurement.Firstly ,we generate good light pulse.This light pulse have steep and steady rising edge and narrow width.The single pulse must have adequate power,or we can not receive the echo signal ,because it has been submerged by noise.Then we design the receiving mode using APD and amplifier and comparer.Secondly ,We learn that the clock benchmark's stability is a key factor for the counter. In the hardware, we study the high stabilization and frequency ECL circuit and use it as the clock benchmark.Lastly, we programme using VHDL Language,implement counting and controlling and get last count results and output them through parallel port.After the experimentation, we analyze the data and find that the precision has reached our request, 0.3m. It will expand the application range of pulse LIDAR, such as the measurement of terrain and physiognomy, trace and test of aim. Using the technology of miniaturization, we can apply it to weaponry system.