高精度多路激光測(cè)控系統(tǒng)的設(shè)計(jì)與實(shí)現(xiàn)
[Abstract]:Pulse laser ranging plays an important role in the field of 3D imaging. Therefore, it is of great significance to study its high-precision ranging method and design its control system. The purpose of this project is to design a high precision multi-channel laser radar measurement and control system for outdoor 3D imaging. The system has the advantages of wide range, high accuracy and customizability. In this paper, the overall requirements of the system are analyzed, and the overall architecture of the system is introduced. According to the functional requirements and performance indicators, the whole system is divided into modules, and the specific design of each sub-module is introduced in detail. The core of the system is composed of three modules. The signal conditioning module is used to adjust the laser echo pulse and the laser receiver control pulse. The timing module adjusts the time delay and time of the laser receiver by predicting the laser return time. The time measuring module is used to measure the pulse time interval of laser emission and return. The core chip of time measurement is TDC-GPX hour conversion chip of ACAM Company of Germany. The time measurement of 8 channels within 10 渭 s and 2 channels of 10 渭 s or 100 渭 s is accomplished by I mode and G mode, respectively. The related parts of the system control include GPS timing, laser mirror rotation control and angle reading, storage system, user interaction, and core integration control. The GPS timing is accomplished by the cooperation of FPGA and external Beidou BD-126 module. The precision of timing is 1 渭 s and the highest frequency is 5 kHz. The actual rotation mode of the mirror is based on the rotation speed and angle set by the user, and the reading accuracy of the laser emission angle is 0.000 擄. The user interaction part is composed of parameter configuration software and data conversion software. The core integrated control module calls each sub-module of the system reasonably, so that the system can control the equipment to complete the whole testing process methodically, and complete the system function integration. Finally, the overall performance of the system is tested and analyzed. The test results show that the whole function of the system meets the requirements of the system, and all the performance indexes meet the expected requirements.
【學(xué)位授予單位】:哈爾濱工業(yè)大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2017
【分類號(hào)】:TN249
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