1. TV signal engineering, such as TV monitoring system, cable TV.
2. Communication engineering, such as telephone.
3. Intelligent fire protection engineering.
4. Sound reinforcement and sound engineering, such as background music broadcasting in the community, background music in buildings.
5. Integrated wiring project, mainly used for computer network.
Weak current engineering construction problems:
1. Industry characteristics
There are many subsystems in the weak current system, and the technology involves automatic control, communication, computer, electronics, sensors, machinery and other fields. In the existing theoretical system, some focus issues have not been finalized, and there are few engineering construction experiences that are worthy of reference and promotion. In actual projects, it is easy to be restricted by other professions and units, and the design can only be fully carried out in the later stage of the project, resulting in tight design time, and it is too late to think carefully; during the implementation of the project, the bidding behavior is not standardized, and the system products are arbitrarily changed, resulting in a lot of design work. Waste; construction drawings and decoration are seriously disconnected, and user requirements are inappropriate and unclear, which makes designers do a lot of useless work; user functions are changed at any time, which brings a lot of inconvenience to the design.
2. Technical standard issues
At present, some domestic places such as Shanghai, Jiangsu, Shandong and other provinces and cities have formulated local design standards, and the Ministry of Posts and Telecommunications is also formulating integrated wiring standards, but the industry standards or national norms for the entire weak current integrated system have not yet been formed. What standard to design according to, what grade and equipment level to achieve, how to choose international technical standards suitable for China's national conditions, how to carry out project quality assessment and acceptance, these are the urgent problems to be solved in the weak current integration market.
3. Construction Orientation Issues
Many owners, government departments, some Class A design institutes, large construction units, supervision units, and engineering companies all have misunderstandings about the entire weak current design, and are not very clear about the design procedures, processes, and content. There are differences in the level of designers, and the design division is unreasonable; lack of understanding of the technology used, equipment and operating conditions, and false propaganda. Unrealistic requirements for intelligentization have many functions to be realized by the system, showing great randomness; some owners unilaterally pursue advanced technology and complete functions; The hat is enough; especially in equipment selection or system integration, it often succumbs to the trend or arbitrarily raises it, resulting in equipment and facilities not operating normally, resulting in a great waste of investment.