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为整合有效载荷,提出并实现无线激光通信与测距一体机的通用方案。无线光通信与测距模块机在硬件上共享探测器、前放、驱动源和激光器,只需添加整形和计数电路就可以对无线光通信端机进行改造。进行了理论和实验研究,重点研究信噪比和温度这两个主要因素对测量精度的影响。结果表明:为减少周期测量标准差、避免测量周期因信噪比较低而产生剧烈波动,接收机最小光功率应大于0.5mW;另外,不考虑温度影响时,采用多周期计数可以使测量精度达到亚毫米量级,但是实验测得温度变化30℃,测量距离将因电路延迟而变化2.25cm,因此,高精度测距必须进行温控。
In order to integrate the payload, a universal scheme of wireless laser communication and ranging machine is proposed and implemented. Wireless Optical Communication and Ranging Module Machine Sharing detectors, preamps, drive sources and lasers on hardware enables wireless optical communication terminals to be retrofitted with the addition of shaping and counting circuits. Conducted theoretical and experimental research, focusing on the impact of signal to noise ratio and temperature on the measurement accuracy of the two main factors. The results show that in order to reduce the standard deviation of period measurement and to avoid violent fluctuation of measurement period due to low signal-noise ratio, the minimum optical power of the receiver should be greater than 0.5mW. In addition, when the temperature is not affected, the multi-period counting can make the measurement accuracy However, when the experimentally measured temperature changes by 30 ° C, the measurement distance will change by 2.25 cm due to the circuit delay. Therefore, temperature measurement must be carried out with high precision ranging.