电脉冲如何激发脉冲超声波激发脉冲超声波的电脉冲一般是一个上升沿小于20ns的很尖很窄的脉冲.而从超声波脉冲波的波形看,其

人工翻译,请审阅
Stepper motor is an electromechanical component which can convert electric pulse signal into angular displacement or line position,and it has the advantages of easy open-loop control and no cumulative error.However,there are some problems for stepper motor in the applications where high precision is required,such as low-frequency oscillation,high-frequency step-out,etc.,leading to the unstable operation of stepper motor,so the subdivision drive control of stepper motor is proposed.This paper introduces the working principle of four-phase reaction-excited stepper motor,analyzes the advantages and disadvantages of FPGA drive and microcontroller driver,compares the advantages and disadvantages of the principles of PWM subdivision drive circuit and chopper subdivision driver,and proposes using EPGA chip to control the duty cycle of the PWM signal,thereby adjusting the current of each phase of stepper motor.On this basis the forward and reverse rotation,the normal operation and subdivision operation of stepper motor are realized.

理论上,是可以的= =
补充一下
我觉得楼下说了跟没说一样- =
神经点冲动所测定的不是电流.而是电势变化
你说的是啥 是电流.
『
“轴突中的峰电位并不像导线中的电流.在金属导线中,电流是由一团电子携带的.在神
经元中,细胞绝缘膜上有蛋白质构成的分子门,电效应依赖于通过分子门进出轴突的那些带
电离子.”用金属导线测不到?请指教
』
这个说的不错 看你测的是啥东西,如果直接测这个离子流,有专门的方法,但是我们可以通过侧面的东西去反映这个离子流的存在
就是所谓的电势【膜内外电压差】
一般需要非常微小的电极.而且电极需要特殊处理 一个放细胞内一个放细胞外= =
你自己想 你怎么做吧