At present, there are many types of building intercom systems with alarm functions on the market. The professional alarm system has been recognized by ordinary residents from the “old Wang Xietang front Yan and flew into the homes of ordinary people†and is the result of years of promotion in the field of intelligence. But isn't a host with alarm function that can really meet the alarm requirements of the household?
The design of building intercom alarm system should take full account of different objects of use and different use environments. Many important functions of professional alarms must be absorbed in technical design to ensure that the alarm system can be used in a large number of civilian applications. It must not be only functional. The furnishings, selling points on the sale.
1. Reliable communication guarantee
The alarm signal received by the building intercom alarm module must be reported to the management center reliably. No false alarms, especially missed reports, can be made to ensure that the alarm is successful. Alarm information confirms whether the alarm part of the building intercom receives the alarm signal and sends it to the management center. A central alarm information confirmation mechanism must be established. After the management center receives the alarm information, it should send a confirmation signal to the control panel to indicate that the center has received it. The building intercom alarm host should retransmit it when it does not receive the confirmation signal.
Alarm information verification alarm information and building intercom communication information share data line and management center network, complex line problems, communication conflicts (alarm and building intercom information) may cause alarm information error, must verify the communication information (for example, CRC, checksum, etc.), the management center checks the information and retransmissions errors; the communication interception alarm information adopts an active transmission mode, and the communication line is intercepted before transmission to avoid data rear-end phenomenon, ensuring a communication. success.
2. Rich communication protocols
A good alarm host must have a rich scientific communication protocol, and a host that can only alarm and communicate is still a long way from practical requirements. For example, the internationally popular Ademco4+2 and Ademco ContactId alarm communication protocols are relatively well-established and scientific. However, in civil affairs, many communication contents can be saved, but the following items have special significance. When the host disarms and defends the function, when the occupant disarms the building intercom alarm, the alarm should report the status to the management center, which has special significance.
The use of alarms by tenants may cause disputes. For example, if someone else fails to arm the system for reasons, resulting in loss of property, it may warn about the failure of the alarm system and request a claim. At this time, the management center can query the user to confirm the release of the armed record. This kind of case appeared in reality in many cases; the management center can also monitor the status of important user hosts in time, and even the management center can take the initiative to disarm the occupants.
Self-test function
The alarm system is a product that is not afraid of 10,000 and is afraid that it will be in the event of normal use. However, in the event of an alarm, it is necessary to ensure that the alarm is successful! It is difficult for tenants to think that they know that the alarm is normal or not. The design of the alarm should have a self-checking function. The results of the self-inspection should be reported to the management center and be monitored by the management center. The fault should be maintained immediately.
The center actively withdraws the defense function. In the case of authorization, the management center can send instructions to arm the resident host to avoid unnecessary losses and reduce the hassle of the occupants;
3. Integration with building intercom design
The alarm host is integrated with the indoor building intercom host to ensure that the user's operation is more convenient, the integration is high, and the project construction is also introduced. The following items deserve attention in the design.
Modular design
Modular design can not only bring convenience to manufacturers, but also suits practical needs. As a basic component, the building intercom is installed in the residents' homes. Generally, the intercom is installed at one time, and the alarm module is specifically installed according to the user's requirements. Modular design can be flexibly applied to this model to reduce the intelligent investment, and the engineering company is willing to accept it.
Unified cabling
The building intercom and alarm system are wired together and connected to the wiring board of the indoor building intercom host. From no visible to visual and then to the alarm no need to re-wiring, to facilitate the system upgrade;
Lead-through design
Building intercom and alarm systems can share the same data line (two-wire 485 bus), reducing the amount of wiring, and facilitate the integration of the central system. However, if it is necessary to satisfactorily solve the problem of conflict between a large number of building intercom messages and alarm messages on a line, a reasonable communication protocol must be formulated.
Humanized operation design
The daily operation of the alarm system (removal, emergency alarms, etc.) must be aimed at users at all levels. For example, if you use push-button operation as much as possible, you must have clear indicators and horn prompts. If possible, use a remote control to focus your daily operations on the remote control. The alarm console is completely transparent to the user.
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