Smart city value

The China Smart City Construction Industry Development Trend and Investment Decision Support Report divides the overall structure of a smart city into three levels: the perception layer, the interconnection layer, and the application layer. The sensing layer is the collection of information and is

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How many cameras can the POE switch supply at the same time?

Many customers are consulting POE switches. They are more concerned about how many surveillance cameras can be connected to a POE switch. After reading this article, you are so smart that you will not be able to beat you! To understand how many cameras can be connected to the POE switch at the sa

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Oval gear flowmeter common fault

First, the elliptical gear does not rotate: 1, there are debris in the pipeline; 2. The filter is damaged, and the debris enters the watch, causing the gear to be stuck; 3. Because the flow rate is too large, the bearing wears, and the elliptical gear collides with the internal helium, causing t

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LED advertising screen simple problem handling method

LED advertising screens have been developed in China for more than 20 years, and have been fully covered into people's field of vision. LED display screens of various shapes can be seen everywhere on the road. The content displayed by the LED display screen can be text information or image or

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