In the construction of all community intelligent systems, the most popular and closely related to residents' lives should be the building intercom system and the home burglar alarm and emergency help system. In the early construction of intelligent community, because the manufacturers of building intercom system and anti-theft alarm system are relatively independent, the system does not consider too much integration, basically adopts products of multiple manufacturers, and currently there are many on the market. A building intercom system with alarm function has been introduced. Because the alarm system has special characteristics in terms of technical complexity, reliability, operability and function, how the traditional alarm device is designed in a unified manner with the building intercom system, and combined in large-scale promotion in the intelligent community Use is the focus of this article. Â Waterproof Plastic Pvc Floor Carpet Waterproof Plastic PVC Floor Carpets are the perfect solution for anyone who wants to protect their flooring from the elements. These waterproof flooring mats are made from a durable and waterproof PVC material that is both flexible and durable. They are designed to provide the ultimate in protection from water, dirt, and debris. They are perfect for use in commercial and residential settings, as they can withstand daily wear and tear and still look great. The waterproof PVC material makes them resistant to chemical spills and sunlight, so they will not yellow or fade. Additionally, these flooring mats are easy to clean with just a wipe, and they are both reusable and recyclable. Choose Waterproof Plastic PVC Floor Carpets for your home or office to create a stylish and practical flooring solution that is perfect for all your activities. Waterproof Plastic Pvc Mats,Pvc Floor Carpet,Industrial Carpet,PVC Anti-slip Mats Jiangyin Yining E-Commerce Co., Ltd , https://www.jypvcmatyining.com
       Suitable for distributed alarm requirements
 Financial banks and villas are used more;
 Due to the use of ordinary telephone line networking, and the management center does not need wiring, suitable for the transformation of the old community;
Talking about the Design of Anti-theft Alarm System in Building Intercom System
   (I) Introduction to the typical alarm system networking
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   At present, the alarm system on the market has a system that uses a plurality of methods such as a telephone line, a bus, a network, a power line, a dedicated line, and a wireless system.
Below we focus on the two most widely used applications.
1. Telephone line networking
   The alarm host in the home is connected to the management center via a common telephone line. This kind of networking method is widely used in early intelligent communities. At present, foreign manufacturers such as ADEMCO, C&K, FBI, DSC, etc. adopt this method.
       advantage:
      No wiring required
        With voice communication alarm function
 You can call the phone or phone to make a voice communication alarm.
       Disadvantages:
    The capacity is small, the alarm speed is slow. Because the alarm center also uses the telephone line, communication congestion will occur at the same time in many alarms. Generally, it is triggered from the alarm--"Dial report--"The center alarm is successful for 8~20 seconds, taking into account the alarm system every day. All have certain status (removal, self-check, etc.) signal reporting, not suitable for use in large and medium-sized communities.
    High communication costs
Due to the use of telephone line communication, a telephone bill is charged each time it communicates with the alarm center.
   Overview:
   The telephone line networked alarm system is more suitable for the requirements of distributed alarms. It has the characteristics of voice communication and no wiring function, especially suitable for the old community alarm modification. However, in a newly built community with a certain scale, the communication speed is slow, the capacity is small, the cost is high, and the cost is high. This affects the shortcomings of popularization and use. At the same time, it is different from the intercom system networking method, and it can not be effectively combined with the intercom system. .
2. Bus system networking
   The alarm host in the home is connected to the management center through a dedicated data line (2-core). Each alarm host has an opposite address code, and the address code is used to identify the alarm. This kind of networking method is widely used in intelligent communities. At present, domestic professional bus system alarm host and building intercom alarm host adopt this networking mode.
   advantage:
    Fast communication speed and large capacity
   Using the 485 bus mode, when the baud rate is only 2400, an alarm message is reported only for 0.1~0.3 seconds.
The center is basically not busy, suitable for large-capacity communities;
    Two-way communication
   Using the bus system, not only the alarm can be reported, but the center can also download the information quickly;
    Low cost
   Since the community uses its own communication line, the alarm communication does not require a fee, which can reduce the burden on the household;
    Good integration performance
   Since most intelligent systems use bus-based communication, it is easy to integrate with other systems, reducing engineering costs.
Enhance the center communication control function;
    low cost
   The bus system alarm system eliminates the dialing module in the telephone line alarm system, and the cost is greatly reduced, which is convenient for popularization;
   Disadvantages:
    High construction requirements
   There are high technical requirements for line laying and bus isolation;
    No voice communication
   It is only suitable for network use, not suitable for exclusive use by households, and lacks effective means of alarm notification to users;
    Not suitable for long distance alarm users
   The communication distance between the general alarm and the center should not exceed 1200 meters;
  Overview:
   The bus-based networked alarm system has the outstanding advantages of high speed, large capacity and low cost, and can be unified with the building intercom system.
Wiring, very suitable for use in new, especially large and medium-sized residential areas, is a popular family product.
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   (II) Design points of building intercom alarm system
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   At present, there are a variety of building intercom systems with alarm functions on the market, and the professional alarm system is from the old time, Wang Xietang Qianyan,
Flying into the homes of ordinary people, recognized in the ordinary residents, is the result of years of promotion in the field of intelligence. But is it a host with an alarm function that can really meet the requirements of the residents' alarm? The design of the building intercom alarm system, It is necessary to fully consider the different use objects and different use environments, and to absorb many important functions of professional alarms in technical design, in order to ensure that the alarm system is used in large quantities in civilian use, it must not only be functionally placed on the house. Selling point.
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1. Reliable communication guarantee
   When the building intercom alarm module receives the alarm signal, it must be reported to the management center reliably. No false alarms, especially missed reports, can be made to ensure the alarm is successful.
    Alarm information confirmation
   Is the alarm part of the building intercom received an alarm signal and can be sent to the management center? The central alarm information confirmation mechanism must be established. After receiving the alarm information, the management center should send an acknowledgment signal to the alarm host, indicating that the center has received, and the building intercom alarm host should resend when it does not receive the acknowledgment signal;
    Alarm information check
   The alarm information and the building intercom communication information sharing data line are connected with the management center. Complex line problems and communication conflicts (alarm and building intercom information) may cause the alarm information to be wrong. The communication information must be verified (for example, CRC, Checksum, etc.), the management center checks the information and retransmits the error;
    Communication interception
   The alarm information adopts the active transmission mode, and the communication line is intercepted before transmission to avoid data rear-end phenomenon and ensure a successful communication;
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2. Rich communication protocol
   A good alarm host must have a rich scientific communication protocol, and a host that can only communicate with the alarm has a great distance from the practical requirements. For example, the current international popular Ademco4+2, Ademco Contact Id alarm communication protocol is relatively complete and scientific. However, in civil occasions, many communication contents can be omitted, but the following items have special significance.
    Host disarming function
   When the resident disarms the building intercom alarm, the alarm should report the status to the management center for record, which has special significance.
Residents using the alarm may cause disputes. For example, when someone else does not warn the system for reasons, the property may lose the property and may report the failure of the alarm system and request a claim. At this time, the management center may query the user for the evacuation record to confirm. This kind of case has appeared too much in reality; the management center can also monitor the status of important user hosts in time, and even the management center can actively disarm the households;
    Self-test function
   The alarm system belongs to the product of "not afraid of 10,000, just afraid of it". It can't be seen in normal work, but in the event of an alarm, make sure the alarm is successful! It is difficult for the occupants to know whether the alarm is normal or not. The alarm design should have a self-checking function, and the self-test results will be reported to the management center at regular intervals, and will be monitored by the management center.
    Center active disarming function
   What should I do if I live outdoors and forget to arm?
   In the case of authorization, the management center can send instructions to arm the host to avoid unnecessary losses and reduce the trouble of the residents;
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3. Intercommunication design with building intercom
   The alarm host is integrated with the indoor building intercom host to ensure the user's operation is more convenient, the integration is high, and the engineering construction is also introduced. The following items are worthy of attention in the design.
    Modular design
   The modular design not only brings convenience to the manufacturer, but is also very suitable for practical needs. As a basic component, building intercom is installed in the residents' homes, generally in one place, and the alarm module is installed according to user requirements. The modular design can be flexibly applied to this mode, reducing the investment of intelligence, and the engineering company is willing to accept it;
    Unified wiring
   The building intercom and alarm system are uniformly wired and connected to the wiring tray of the intercom host in the indoor building of the household.
From non-visual - "visual -" alarms do not need to be re-routed, so that the system can be upgraded;
    First-line design
   The building intercom and alarm system can share the same data line (two-core 485 bus), reducing the amount of wiring and facilitating the integration of the central system. However, in order to satisfactorily solve the problem of conflicts between a large number of building intercom and alarm information communicating on one line, a reasonable communication protocol must be uniformly formulated (see the previous section);
    Humanized operation design
   The daily operation of the alarm system (disarming, emergency alarm, etc.) is required for all levels of users. For example, try to use the button operation, have a clear indicator light and speaker prompts, use the remote control when possible, and concentrate the daily operation on the remote control, and the alarm host is completely transparent to the user.
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