On-line Test Technology Research on Continuous Laser Ranging System on the Car

摘要

The peak power is an important parameter in appraisement of laser furnish's effects performance.There are always two chief problems when detecting the peak power of vehicle repeated frequency laser ranging system on-line.Firstly,it isn't convenient to collimate,timing and handling the optics system..Secondly,for the repeated frequency narrow impulse laser,if using electricity voltage collecting card to collect the electric impulse signal directly after photoelectric conversion,it is too strict for the requirement of the performances of the collecting card such as sampling frequency and so on,and it woulds increase the costs of the whole designing and the instability factors of the detecting system..This paper offers a new method to solve the problems of detecting the peak power parameter,detecting the laser transmitting system on-line on the vehicle directly.Designing an optical fast collimating and easily locating device,and adjusting this device to random height, pitch and azimuth to complete collimating and prefocus to the optics system,can increase the accessibility,accuracy and worked efficiency of on-line detecting greatly.According to the feature that the repeated frequency impulse is narrow,we design a impuse laser peak power acquisition device.Using the fast response photoelectricity detector in the device to invert the laser impulse to the electric impulse,then using amplifier-broadening circuit to complete amplificating line shaped and holding broadending peak value to the electric impulse.and then using discharge circuit to fast discharge the broaden repeated frequency electric impulse, through this method ,we easily complete detecting each laser impulse's peak power in low cost.