广州市邮政局国内包裹车间和总进口车间邮袋滑轨存贮控制电路,采用晶体管选频开关。当某条滑轨贮满邮袋后,选频电路给出控制信号,控制道岔电磁铁动作,邮袋即自动转轨。一、基本设计思想用选频开关控制转轨,利用了小车夹钳由金属材料制成的特点。我们通过图1说明这种控制方式的基本设计思想。由图1看出,我们 Guangzhou City Post Office domestic parcel workshop and the total import shop pouch slide rail storage control circuit, the use of transistor frequency switching. When a slide storage pouch, the frequency control circuit gives the signal to control the action of turnout solenoid, pouch that automatically switch. First, the basic design idea with the frequency switch control switch, the use of car clamps made of metal materials. We use Figure 1 to illustrate the basic design concept of this control method. From Figure 1 we can see