旋转激光扫描测量系统采用光电扫描的计时方式并结合时空转换的原理实现角度交会定位，光电信号时域信息的精确性是影响测量精度的重要因素之一。针对测量系统中同步信号存在延时的问题，根据测角误差的特性提出一种基于发射基站转台正、反转测量目标的延时评估方法。通过定量分析同步信号的延时，建立同步信号的延时模型。基于可编程逻辑器件分析延时对测角精度的影响，研究同步信号电路延时的补偿算法并设计实验进行验证。实验结果表明，所提方法能够有效补偿同步信号原有约为190 ns的电路延时。

A rotating laser-scanning measurement system utilizes a photoelectric-scanning timing method and combines the principle of space-time conversion to provide angle-rendezvous positioning. The accuracy of the time-domain information in the photoelectric signal is an important factor， which affects the measurement accuracy. To address the problem of delay in the synchronization signal in the measurement system， we propose a delay-evaluation method that uses forward- and reverse-measurement targets on the transmitter base-station turntable according to the characteristics of the angle-measurement error. By quantitatively analyzing the delay in the synchronization signal， we first establish a delay model for the synchronization signal. Using a programmable logic device， we then analyze the influence of the delay on the accuracy of the angle measurement， study the algorithm used to compensate for the synchronization signal circuit delay， and design experiments to verify it. The experimental results show that the proposed method can effectively compensate for an original circuit delay of approximately 190 ns in the synchronization signal.