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本文分析了采样及一阶数字环路检测转速存在的问题,提出在一阶数字环路中引入逻辑控制电路,可大大加快转速的数字表征量V_s对频率表征量f_1的跟踪。设计了简单可行的脉冲减法运算电路和馈送自动转换电路。通过实验,证明在复盖D<3的范围内,所提实验环路的等效时间常数可接近模拟检测,使数字式转速连续检测装置更为切合实用。
This paper analyzes the sampling and first-order digital loop detection speed of the existing problems, proposed in the first-order digital loop logic control circuit is introduced, can greatly speed up the digital representation of the speed V_s of the frequency representation of the f_1 tracking. Design a simple and feasible pulse subtraction circuit and feed the automatic conversion circuit. Through experiments, it is proved that the equivalent time constant of the experimental loop can be close to the simulation detection within the coverage of D <3, making the digital rotation speed continuous detection device more practical.