| 摘要 |
<p>A same-time-sequence multi-pulse lightning protection box comprises a lightning protection module, a sampling circuit, a detection circuit, and a display panel connected in sequence. The sampling circuit comprises an EMC strong electromagnetism suppression circuit, a signal acquisition circuit, and a strong electromagnetism isolation and suppression circuit. When a low-voltage power supply circuit is impacted by a lightning electromagnetic pulse, a lightning overvoltage signal is generated on the low-voltage power supply circuit and is applied to the lightning protection module. The lightning protection module transmits one path of the lightning overvoltage signal to the EMC strong electromagnetism suppression circuit, and another path of the lightning overvoltage signal is connected to a PE end, so that lightning is conducted into the ground. The EMC strong electromagnetism suppression circuit limits the rising gradient and amplitude of the generated lightning overvoltage signal and transmits the processed signal to the signal acquisition circuit. The signal acquisition circuit acquires the signal and transmits the acquired signal to the strong electromagnetism isolation and suppression circuit. The strong electromagnetism isolation and suppression circuit isolates the signal, and transmits the processed signal to the detection circuit and the display circuit panel, so that man-machine information exchange is implemented.</p> |
