In the process of construction near overhead transmission lines, the safety distance between the crane, tower crane, and live wire is insufficient, which leads to the tripping of lines. It not only causes huge economic losses, but also endangers human life safety. In order to avoid the car accidentally touching live wire, this paper studies a high voltage near electric safety distance alarm device, and introduces the structure and working principle of the device. The voltage signal is measured by the test to reflect the distance between the vehicle and the live wire. The measured voltage signal data is processed and compared with the alarm voltage signal threshold. According to different voltage levels and distances, the high voltage near electric safety distance alarm device can realize voice alarm and remind operators to pay attention to keep a safe distance.
As the core equipment of urban power supply, once the cable is on fire, it will have a great impact on the economy and people’s livelihood. Cable passage fire extinguishing equipment is a reliable infrastructure to eliminate cable fire, and detection components are the key to correct and timely action of fire extinguishing equipment. This paper designs a temperature detection module based on DS18B20, and discusses the design principle from the aspects of internal structure, command sequence, signal mode and so on.
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