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The building intercom system is the security line in our home. Once it is destroyed, it is prone to a door-to-door theft. Therefore, we must maintain and maintain the security guards of building intercoms. First, when you open the door, wait for the building staff to issue an opening signal, and t

At the just-concluded 2014 CES exhibition, smart home products based on home Internet technology shined. However, according to Fenghuang.com, researchers from Proofpiont, a network security agency, recently said that for the first time, a black hand has been found on the home Internet, a large-scal

With the continuous development of technologies such as liquid crystal display technology, embedded hardware splicing technology, multi-screen image processing technology, and signal switching technology, it can effectively control its core technology and cost control. LCD splicing walls have the a

For those who work in the field of security monitoring, no matter who they are, I am afraid that when they enter the industry, they are confused by a pile of dazzling data. What kind of camera is a good camera? What kind of imaging standards can meet our shooting requirements? Or what kind of lens

How to do the renovation of the old house? With the development of society and the improvement of people’s living standards, more and more owners have begun to intentionally renovate their old homes. However, the renovation of old homes is slightly different from the renovation of new homes.

With the constant construction of modern cities, elevators are used more and more frequently. However, elevator accidents have occurred one after another. As a result, we can not help asking questions about the safety of elevators. Why is it so fragile? In the face of frequent elevator accidents,

Variable-frequency drive (VFD) is a power control device that controls the AC motor by changing the working frequency of the motor by applying variable frequency technology and microelectronic technology. The frequency converter is mainly composed of rectification (AC to DC),