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b06340130

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由于本系统送样动作不需要实时跟踪,目标恒定,只需取样时保证精确传送定位即可。伺服舵机由以下几个部分组成:舵盘、减速齿轮组、位置反馈电位计、直流电机、控制电路板等。其工作过程是,每一种液体流出后移送定位信息进入信号控制芯片,获得直流偏置电压后与基准电压比较,获得电压差后输出,再将电压差的正负输出到电机驱动芯片,决定电机的正反转。电机转速一定,通过级联减速齿轮带动电位器旋转,伺服舵机用PWM信号控制速度和转角,从而达到易控制、精度高和速度快的目的。
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fjtony163

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爱与雨下(金币+2): 2011-11-11 19:52:07
b06340130(金币+30, 翻译EPI+1): 2011-11-15 11:25:27
Because the sample transferring action of this system has no need to real time tracking, the target is consistent and only insure that sample can be transferred back to position only. The servo steering gear consists of the following parts: tiller, reducing gear set, position feedback potentiometer, DC electric generator, and control circuit. The working procedure are sending position information to signal control chip after every fluid flowed out, comparing to standard potential after obtaining DC skewing potential, outputting after obtaining voltage difference and outputting charge of voltage to motion ship to determine the rotation. The constant revolution of generator, rotation of potentiameter of connected reducing gear, and controlling speed and angle by PWM signal by servo steering gear, are designed to goal the easy control, high accuracy and high speed.
2楼2011-11-11 10:29:14
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