Research on CCD Angular Measuring System of Theodolite Based on MSP430

摘要

Angular measuring system is the central part of theodolite. In spaceflight system, angular measuring precision of theodolite has great influence on pointing precision of space vehicle. A CCD high precision angular measuring system based on MSP430 has been introduced in the article. System configuration and principle are analyzed. Besides the detection and processing of CCD signal are introduced detailedly and processing circuits are designed. After analyzing factors of angular errors, system error signals are reconstructed by one dimension Mallat’s algorithm of wavelet. Reconstructed signal instead of original error signal is used to compensate the system error to improve the angular measuring accuracy.