What are the wiring methods of smart home at present?

2. Bus connection

3. Power line carrier connection

4. Infrared connection (IR)

5. Wireless (RF) connection

1. In terms of stability, star connection is the most stable and reliable, followed by bus connection, power line carrier connection, infrared connection (IR) and wireless connection (RF). The traditional security system adopts star connection, so it is also the most reliable.

Although bus connection also needs wiring, when there are many points, the number is less than that of star connection, and its reliable lines are generally acceptable. Power line carriers and wireless connections have similar problems, mainly the interference between neighboring families. From a technical point of view, power line carriers can solve the interference between them through isolation and other technologies. It is relatively difficult for wireless methods to solve the interference between them at low cost, and only using frequency hopping technology can really solve it. In addition, wireless has power supply problems, so wireless should be a secondary choice in home intelligence, especially in security systems.

Second, look at the problem from a market perspective. There are three markets for home intelligence: new residential quarter market, personal home improvement market and old house renovation market.

Newly-built communities are generally based on communities, which need network alarm and information interaction. The requirement of intelligent wiring in residential district construction should not be based on the complexity of wiring, but on reliability. The overall realization of a community's intelligence, even if there are problems, is also multiplied by the total number of problems of the number of households. Generally speaking, it should not be too complicated to realize home intelligence in a residential area, otherwise acceptance and maintenance will be a big problem. So star connection should be the main way for the community to realize intelligence. The personal home improvement market needs more personalized home intelligence functions, but there is no requirement for networking. Because personal home improvement is generally promoted by decoration companies, the sales that can be achieved are relatively high, so the functional demand within the family is generally more, and the number of points reached is correspondingly more. At this time, both the reliability and expansibility of the system are required. Because wiring is not a big problem at this time, the home improvement market tries to adopt star and bus. In general, the requirement of wiring in the old house renovation market is to minimize wiring. At this time, the star and bus connection modes sometimes seem inadequate. Therefore, power line carrier and wireless should be the main connection modes in the old house reconstruction market.

Thirdly, as a practical home intelligence system, the best scheme should be one in which multiple wiring modes can be mixed.

For example, for the sake of safety, try to use star connection mode, which can also be supplemented by bus mode or wireless mode. Power line carrier is difficult to be used to connect safety probes, because it can't solve the problem of signal transmission during power failure. Star connection is also the best solution for information integrated wiring. Lighting appliances other than information appliances such as air conditioners and rice cookers can be controlled by bus, power line, wireless and infrared.