江苏春晨电缆有限公司生产YCB扁电缆,一种简易测量导线断芯位置的电路
A simple circuit for measuring broken core position of wire
2015.12.14 14:23 评论：2
2015.12.14 14:23 comments: 2
对于内部断芯的绝缘导线、电缆线往往废弃不用，这是十分可惜的，假如能确定断芯位置，就可进行修复。
It is a pity that the insulated wires and cables with internal broken cores are often discarded. If the location of the broken core can be determined, it can be repaired.
如下图所示电路是用NMOS场效应管组成一种测电笔电路，YCB扁电缆它能够方便地测出导线的断芯位置。测量时，被测导线一端接220V交流电源的相线，另一端悬空，合上控制开关SA，然后将感应测电笔的探头靠近被测导线，并沿导线移动，由于NMOS管的输入阻抗很高，放大倍数很大，所以只要栅极感应到微弱的电压信号，就能引起漏极电流的显著变化，漏极电流再通过三极管放大，足以使发光二极管发光。如果自上而下检查到某一位置时，发光二极管突然熄灭，则所处导线位置即为断芯处。
As shown in the figure below, the circuit is composed of NMOS field effect transistor, which can easily measure the broken core position of the wire. When measuring, one end of the measured wire is connected to the phase line of the 220 V AC power supply, and the other end is suspended. Close the control switch SA, and then move the probe of the inductive measuring pen close to the measured wire and along the wire. Because the input impedance of the NMOS tube is very high and the amplification factor is very large, as long as the grid senses a weak voltage signal, the drain current will change significantly, and the drain current will pass through again Triode amplification, enough to make light-emitting diodes. If the LED suddenly goes out when a certain position is detected from top to bottom, the position of the wire is the broken core.
需要注意，检查时导线或电缆的绝缘层必须完好无损，否则容易触电。
It should be noted that the insulation layer of wire or cable must be intact during inspection, otherwise it is easy to get electric shock.
A simple circuit for measuring broken core position of wire
2015.12.14 14:23 评论：2
2015.12.14 14:23 comments: 2
对于内部断芯的绝缘导线、电缆线往往废弃不用，这是十分可惜的，假如能确定断芯位置，就可进行修复。
It is a pity that the insulated wires and cables with internal broken cores are often discarded. If the location of the broken core can be determined, it can be repaired.
如下图所示电路是用NMOS场效应管组成一种测电笔电路，YCB扁电缆它能够方便地测出导线的断芯位置。测量时，被测导线一端接220V交流电源的相线，另一端悬空，合上控制开关SA，然后将感应测电笔的探头靠近被测导线，并沿导线移动，由于NMOS管的输入阻抗很高，放大倍数很大，所以只要栅极感应到微弱的电压信号，就能引起漏极电流的显著变化，漏极电流再通过三极管放大，足以使发光二极管发光。如果自上而下检查到某一位置时，发光二极管突然熄灭，则所处导线位置即为断芯处。
As shown in the figure below, the circuit is composed of NMOS field effect transistor, which can easily measure the broken core position of the wire. When measuring, one end of the measured wire is connected to the phase line of the 220 V AC power supply, and the other end is suspended. Close the control switch SA, and then move the probe of the inductive measuring pen close to the measured wire and along the wire. Because the input impedance of the NMOS tube is very high and the amplification factor is very large, as long as the grid senses a weak voltage signal, the drain current will change significantly, and the drain current will pass through again Triode amplification, enough to make light-emitting diodes. If the LED suddenly goes out when a certain position is detected from top to bottom, the position of the wire is the broken core.
需要注意，检查时导线或电缆的绝缘层必须完好无损，否则容易触电。
It should be noted that the insulation layer of wire or cable must be intact during inspection, otherwise it is easy to get electric shock.