室内空间测量定位系统是一种基于旋转激光扫描的分布式测量定位系统,激光信号从发射站产生经由物理空间传播并被接收器接收最终形成时间信号的各个阶段中,均易受到干扰并引入测量误差。引入时间信号误差分析方法及对应滤波技术,其以激光信号计时原理为基础,对信号测量过程中可能出现的误差因素进行分析,并基于时间序列统计理论对时间序列信号进行预处理、时域特征分析以及频域特征分析,发现时间序列中存在共模噪声并采取主成分分析法对其消除。实验结果表明:经过主成分分析滤波后,不同时间序列噪声幅度至少减小10%。

The workspace measurement and positioning system is a distributed measurement system based on the rotary laser scanning technology. The laser signals are always disturbed in the processes of generation from the transmitter, transmittance through the physical space and reception by the receiver, and simultaneously the measurement errors are introduced. The time signal error analysis method and the corresponding filtering technology are introduced, and the error components occurred in the measuring process are analyzed based on the laser signal timing principle. Meanwhile, the time series signals are preprocessed as well the time and frequency domain characteristics are analyzed based on the time series statistical theory. The common-mode errors are found existing in the time series data, and the principal component analysis method is adopted to eliminate them. The experimental results show that the noise amplitudes of different time series are reduced by 10% after principal component analysis filtering.