The Study On The Influence Of Environmental Factors In The Process Of Large Size Laser Ranging On The Measurement Accuracy

This dissertation is based on the National Natural Science Foundation of topics "Key technology of high precision and super large space coordinate measurement network based on Wireless Sensor Network"(51275149). The project is to develop a wireless sensor network for the measurement of ultra large scale coordinate measuring system. The measurement scheme is:using three or more outgoing known coordinates of the laser ranging sensor, the measured laser ranging sensor and target target distance, calculated the space coordinates of the target bullseye. However, in the process of large size laser ranging, uncontrollable environmental factors (temperature, humidity, light, wind speed, etc.) may affect the accuracy of the measurement. In this thesis, the task is to determine the environment the main error source, quasi whitening model error factor, error correction of real-time, high precision laser ranging. The main research contents and results of this dissertation are:1. Program analysis. Access to a large number of domestic and foreign literature and theory method which is single parameter, small and uniform field, the experimental research method:development environment monitoring system, to construct environmental factors according to the variation of the simulation environment, real-time access to environmental information, determine the main error source, to establish the main error factor of quasi whitening model, real-time error correction.2. Hardware development of environmental monitoring and control system. The overall framework of the system is put forward, and the hardware circuit design and manufacture of the environment detecting node and the main control node are put forward.3. Software development of environmental monitoring and control system. According to the functional requirements of the system and related experiments, the sensor signal acquisition module, network communication program and the development of management software are realized.4. Completed the experimental study. Comparative test, temperature and humidity sensor calibration experiment, measurement error with the error factor in the change of the research experiment, ranging in the process of node distribution experiment, error correction experimental verification of the correctness of the performance of the system are included. The experimental results show that the main environmental error factor of real-time online error correction improves the accuracy of laser ranging.