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本文在简要地叙述了锁相技术的一般概念,激光测距仪中为什么要锁相以及锁相环路的工作原理和技术指标之后,指出了过去激光测距仪锁相环路所存在的缺点,提出了精密激光测距仪 JCY-3A 型(1号机)中独特的锁相环路,对所使用的锁相环路(新型的鉴相器及环路滤波器)的特点和优点作了分析和描述。文章着重介绍了变带宽法和利用变带宽法所设计的失锁自动恢复电路,并对研制成功的锁相环路的性能和指标作了测试。通过测试和装机实验证明了使用此锁相环路所具有的优点和可靠性。
This article briefly describes the general concept of phase-locked technology, the laser range finder why the phase-locked loop and the working principle and technical specifications of the phase-locked loop, pointed out the shortcomings of the past laser rangefinder phase-locked loop , Proposed a unique phase-locked loop in the JCY-3A precision laser range finder (No. 1 machine). The characteristics and advantages of the phase-locked loop (new phase detector and loop filter) Analysis and description. The article mainly introduces the variable-bandwidth method and the lost-lock automatic recovery circuit designed by using variable bandwidth method, and tests the performance and index of the developed phase-locked loop. Through the testing and installation experiments to prove the advantages and reliability of using this phase-locked loop.