Research On Laser Range Finder System Based On FPGA

At present,the laser ranging system generally uses the analog circuit method to process the echo signal,because of the limitation of the analog signal processing on the signal,so that the useful signal can be easily submerged in the noise signal in the case of strong interference;Although the system adopts the method of digital circuit,the number of sampling points of the echo signal can not satisfy the requirement of high-precision ranging.At the same time,it is limited by the hardware circuit.The range method generally uses simple phase method and impulse method,can not make the measurement accuracy and measurement distance at the same time to achieve the desired effect.The above reasons make the range and accuracy of the laser ranging system are seriously restricted.In this paper,the high-speed data acquisition system and multi-pulse laser ranging system research on the system hardware circuit and algorithm improvements,making the system measurement distance and measurement accuracy have been effectively improved.In this paper,the commonly used laser ranging method is analyzed and the three-pulse cross correlation cumulative mean ranging method is proposed.The singular value detection algorithm of wavelet transform is used in the data processing process,which is the measuring range and measurement precision of the ranging system The hardware design of the transmitter and receiver unit and the analysis of the performance of the key circuit part are completed.The sampling rate of the echo signal 1GHZ is realized,which provides a reliable method for the improvement of the ranging system accuracy.Hardware platform.Thirdly,the control of the whole system process and the processing of the echo signal are realized by FPGA,and the system works according to the preset logic.Finally,through the construction of the experimental platform and the data analysis,the method and the method are verified.Design effectiveness.The system designed in this paper improves the measuring range and measurement precision of laser ranging system,and has important significance in civil and military field.