Research On Transmitter Optimization And Calibration Technology Of Indoor Meas- Urement Positioning System

Precision measurement and position for large scale workpieces is the basis of equipment manufacturing represented by aerospace and traffic equipment manufac-ture, and the indispensable process technology assurance means for improving preci-sion and efficiency and ensuring quality. In the process of precision measurement and position with traditional instruments, conflict between measuring range and accuracy is prominent. Integral performance of the instruments can not meet requires of large scale equipment manufacture. The type of network structure for measuring system provides support in theory for solving the problem. Indoor measurement positioning system is such a system. The system is composed of multiple measuring stations, combining with independent receivers, can measure the whole object with high real-time and better concurrency. It can balance accuracy and large measuring space via increasing stations. The station, which determines the performance of system hardware, is the core of network measuring system's hardware framework. In addi-tion,precision calibration of station's parameters, accurate description of system model and system calibration are the key technology in the software aspect. This pa-per is focus on station optimization and system calibration of the indoor measurement positioning system. The main work is as follow:1,On the basis of analyzing system composition and measuring principle, geo-metrical principle of transmitter's angle measurement is deduced. With designing scanning laser plane, and studying on influence of transmitter's geometry structure parameters on angle measuring precision, the parameters are selected to optimize transmitter's structure.2,With analyzing influence of transient state of shaft system on scanning angle measuring accuracy, importance of working performance of transmitter's rotating parts is indicated. Rotor dynamic model of transmitter shafting is deduced, balance design for rotor is finished, and dynamic performance of several shafting with differ-ent parameters are compared by finite element simulation analyzing, all of these pro-vide theoretical support for shafting design.3,Two system coordinate calculating methods based on azimuth intersection and multi-plane constraint are studied. An integrated calibrating method for fundamental measuring system based on auxiliary instrument is proposed, and the error sources are analyzed. Measuring network construction method based on data fusion is applied in the integrated calibrated systems, so that coordinate systems of them can be unified and large measuring system is formed.4,For perfecting system and improving practicality and accuracy, a step-by-step system calibration method is studied. An accurate adjustment model is established, calibration parameters are classified into intrinsic and extrinsic parameters. In view of the defect of initial position laser plane calibrating method for intrinsic parameters calibration, the model is improved, and arbitrary position laser plane intrinsic pa-rameters calibration method is studied. For extrinsic parameters calibration, a global adjustment orientation approach based on coplanar constraint is presented,the methods for acquiring adjustment initial estimates are studied.