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为满足炸药混装车中干料及成品炸药计量的需要，研制了电脉冲式转速表。将物料的输送量转换成转速电信号，以达到计量的目的。文中阐述了该类转速表的传感器工作原理、结构及转速转换电路的设计，简单介绍了它们的应用及其功能的扩展
In order to meet the need of explosives metering of dry materials and finished products in explosive mixed vehicles, an electrical pulse tachometer was developed. The amount of material delivered to the speed of electrical signals, in order to achieve the purpose of measurement. This paper describes the type of tachometer sensor working principle, structure and speed converter circuit design, a brief introduction of their applications and extensions of their functions