The observation circuit consists of 555 infrared emitting circuit, amplifying circuit and frequency decoding circuit.
监测电路包括555红外发射电路，放大电路以及频率译码电路。
The principle of infrared observation circuit and its application in piston pin electric eddy-current defectoscope is introduced in this paper.
本文介绍红外线监测电路的原理以及在活塞销电涡探伤仪中的应用。
Through observation of the arc movement, the principle of the arc can be understood better and performance of circuit breaker can be improved.
通过对电弧运动的观察有助于更好地理解电弧的原理及对断路器进行改进。
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