The continuous development of the society has brought about a huge increase in the number of floating populations and increasingly complex social structures and social security. Strengthening security protection is a new topic in the construction of all residential communities. Traditional air defense security methods are difficult to meet the requirements of modern society for high reliability and real-time security. In the past ten years, domestic security electronics has developed into an important branch industry of the entire security industry. There are more than 100 security electronics manufacturers, and products It is also varied.
Alarm Host Overview The alarm host can be divided into: telephone alarm host, wired host, wireless host, wired and wireless compatible host, and so on. There are two main categories of alarm information transmission methods.
One is the wireless alarm host, the advantage is easy installation, eliminating the need for wiring, saving installation costs, especially when monitoring the site from the alarm host a few hundred meters or even a few kilometers, the use of wireless host is currently the most feasible and most economical program. However, the following disadvantages are commonly found in wireless transmission methods:
First, the reliability is poor, and the wireless host is vulnerable to interference from other radio waves. Especially the frequency close to or the same as the receiving frequency will directly cause the entire wireless alarm system communication distance to drop or become unusable.
Second, the wireless channel is blocked. At the same time, the wireless host can only receive wireless signals in one position. If two positions start transmitting at the same time and end transmission at the same time, the host is likely to receive only a strong azimuth signal of the wireless signal or Both directions are unacceptable.
The other type is a wired alarm host: a wired connection (non-bus) between the site monitoring detector and the host. Its reliability is greatly enhanced compared with wireless, but there are still shortcomings, such as more wire consumption, installation and wiring cumbersome, and the monitoring site is far away from the host, the use of wired (non-bus), and sometimes the wire costs even far exceeds the alarm The system price is very uneconomical from the perspective of the user.
So, how can we achieve a reliable and relatively economical alarm message transmission? The bus mode is generated under such a development background. The bus mode is essentially a wired mode, but the bus mode can save the wire consumption to a maximum extent. This is the ideal networking mode for large-capacity alarm systems.
Features of the bus-made networked alarm system Looking at the existing domestic and foreign bus system-networked alarm systems on the market, there are generally the following deficiencies: lack of cost-effectiveness, slower and error-prone alarm information transmission in the network, increased number of nodes in the network. Signal interference damage. To this end, the development of a cost-effective bus networked intelligent alarm system has become an urgent need for the market.
The system is a networked intelligent alarm system with RS-485 bus as the network structure. Its user system adopts wired and wireless combination and has the early warning effect of anti-electronic destruction technology. The system's large capacity, versatility, and low price make it ideal for the domestic market.
It has the following significant features:
System capacity, suitable for large and medium-sized community;
High reliability, self-test, automatic error correction;
Modular design, easy to expand, easy to integrate;
Delay, instant, stress, tamper, vandal-proof and other alarm functions;
High security, user/administrator 2 password operation, 3 password error reporting center;
Software full Chinese interface, electronic map display, clear and clear, alarm information processing is simple and timely;
Instantly print alarm information for easy inspection;
Combining the many advantages of the system, its practical scope has been extended to the school bus intelligent alarm system, the hotel emergency assistance alarm system, perimeter perimeter wall alarm system and so on.
Bus system working principle The bus system alarm system is based on home users. When a detector installed on the home user detects an illegal intrusion or emergency distress signal, the alarm will be installed immediately after the home user's alarm host receives the signal. The signal is transmitted to the unit controller on the corridor through the bus, and then transmitted to the center controller by the unit controller. The center immediately sends an audible and visual alarm and transmits data to the computer management software through RS232. The detailed address of the alarm user is displayed on the electronic map. (User's name, unit number, zone orientation, zone type), and the alarm information is immediately printed by the printer to be checked, and can be released after being handled by the central duty officer, so as to effectively ensure the family user's property and personal safety in real time.
The application bus system of the bus system in the smart cell can be expanded to 8 busses, 256 corridor units and 32 halls in the smart cell. Under normal circumstances, the 1-7 bus is mainly based on home alarms, and the 8th bus is mainly based on perimeter alarms.
In order to realize the unified management of the intelligent community, a central controller is equipped in the alarm management center, which is responsible for the unified collection and upload of the entire alarm system information to the computer center management software. In an emergency situation (computer power failure, crash) can work independently offline to complete the display and processing of alarm information. The alarm center software is installed on the management center computer and is responsible for the daily management of the entire alarm system.
For each house with 2 houses and 6 floors, for example, each unit is equipped with a unit controller for receiving and uploading information; 1 and 2 storey households are equipped with 1 user alarm host, 2 door sensors, and 2 pairs of infrared cameras. On the radio, 2 emergency buttons, 2 infrared sensors (according to the actual choice); 3, 4, 5, 6 households each equipped with 2 emergency buttons, 8 information encoder 1, responsible for the collection of 8 emergency Help.
For perimeter perimeter walls, monitoring can be performed through the eighth bus of the central controller. Take 32 pairs of perimeter detectors on the perimeter of the community as an example. A cell controller is configured in the entire cell wall to receive and upload information. Each perimeter detector configures a perimeter module for the detectors to collect alarm information. .
In the alarm control center of the community, one computer (with Poseidon control software installed) and a central controller are deployed. The central controller receives all the alarm information and prints it in real time. The central controller then uploads it to the computer. The computer processes the mass processing of the alarm information.
Application of bus system in other areas The hotel's emergency alarm system is based on hotel rooms. When the emergency button installed in the hotel room triggers an emergency distress signal, the information encoder installed in the hotel corridor will immediately receive an alarm. The signal is transmitted to the unit controller on the corridor through the bus, and then transmitted to the center controller by the unit controller. The center immediately sends an audible and visual alarm to display the detailed address of the alarm user (unit room number, zone orientation) so as to ensure effective and immediate guarantee. Your property and personal safety.
With the popularization of campus modernization, multimedia and audio-visual education equipment, higher requirements have been placed on facility prevention. As an important part of the intelligent security system, the establishment of a school intelligent alarm system is more and more urgent.
For campus management settings, infrared curtain detectors are installed in each window, and infrared wide-angle detectors are installed in each classroom. After the alarm, the host in the duty room can distinguish the location of the alarm to facilitate centralized management services. Bus intelligent alarm system can also achieve this function.
The bus system alarm system uses the school classroom or office as the alarm user unit. When a detector installed in a classroom or office detects an illegal intruder signal, it is converted into an alarm signal that can recognize the azimuth through the address module, and transmits the alarm signal to the alarm signal. The unit controller on the corridor is then transmitted from the unit controller to the center controller via the 485 bus. The center immediately sends an audible and visual alarm. At the same time, data is transmitted to the computer management software via RS232, and the detailed address of the alarm user is displayed on the electronic map (user Name, unit number, zone orientation, zone type), and the printer will print the alarm information to be checked immediately. The central value-keeper can only deal with it after being dealt with, so as to effectively ensure school property and personal safety.
In summary, the bus-based networked alarm system has the advantages of low cost of use and no need to pay for phone charges incurred by users when sending alarm messages, which satisfies the technical requirements of ultra-large-scale fleet users. Especially for one-off networking of large-scale residential areas, the single-device average equipment cost is lower than that of the telephone line networking system. Therefore, the bus-based networked alarm system can play a greater and better role in large and medium-sized establishments.
Alarm Host Overview The alarm host can be divided into: telephone alarm host, wired host, wireless host, wired and wireless compatible host, and so on. There are two main categories of alarm information transmission methods.
One is the wireless alarm host, the advantage is easy installation, eliminating the need for wiring, saving installation costs, especially when monitoring the site from the alarm host a few hundred meters or even a few kilometers, the use of wireless host is currently the most feasible and most economical program. However, the following disadvantages are commonly found in wireless transmission methods:
First, the reliability is poor, and the wireless host is vulnerable to interference from other radio waves. Especially the frequency close to or the same as the receiving frequency will directly cause the entire wireless alarm system communication distance to drop or become unusable.
Second, the wireless channel is blocked. At the same time, the wireless host can only receive wireless signals in one position. If two positions start transmitting at the same time and end transmission at the same time, the host is likely to receive only a strong azimuth signal of the wireless signal or Both directions are unacceptable.
The other type is a wired alarm host: a wired connection (non-bus) between the site monitoring detector and the host. Its reliability is greatly enhanced compared with wireless, but there are still shortcomings, such as more wire consumption, installation and wiring cumbersome, and the monitoring site is far away from the host, the use of wired (non-bus), and sometimes the wire costs even far exceeds the alarm The system price is very uneconomical from the perspective of the user.
So, how can we achieve a reliable and relatively economical alarm message transmission? The bus mode is generated under such a development background. The bus mode is essentially a wired mode, but the bus mode can save the wire consumption to a maximum extent. This is the ideal networking mode for large-capacity alarm systems.
Features of the bus-made networked alarm system Looking at the existing domestic and foreign bus system-networked alarm systems on the market, there are generally the following deficiencies: lack of cost-effectiveness, slower and error-prone alarm information transmission in the network, increased number of nodes in the network. Signal interference damage. To this end, the development of a cost-effective bus networked intelligent alarm system has become an urgent need for the market.
The system is a networked intelligent alarm system with RS-485 bus as the network structure. Its user system adopts wired and wireless combination and has the early warning effect of anti-electronic destruction technology. The system's large capacity, versatility, and low price make it ideal for the domestic market.
It has the following significant features:
System capacity, suitable for large and medium-sized community;
High reliability, self-test, automatic error correction;
Modular design, easy to expand, easy to integrate;
Delay, instant, stress, tamper, vandal-proof and other alarm functions;
High security, user/administrator 2 password operation, 3 password error reporting center;
Software full Chinese interface, electronic map display, clear and clear, alarm information processing is simple and timely;
Instantly print alarm information for easy inspection;
Combining the many advantages of the system, its practical scope has been extended to the school bus intelligent alarm system, the hotel emergency assistance alarm system, perimeter perimeter wall alarm system and so on.
Bus system working principle The bus system alarm system is based on home users. When a detector installed on the home user detects an illegal intrusion or emergency distress signal, the alarm will be installed immediately after the home user's alarm host receives the signal. The signal is transmitted to the unit controller on the corridor through the bus, and then transmitted to the center controller by the unit controller. The center immediately sends an audible and visual alarm and transmits data to the computer management software through RS232. The detailed address of the alarm user is displayed on the electronic map. (User's name, unit number, zone orientation, zone type), and the alarm information is immediately printed by the printer to be checked, and can be released after being handled by the central duty officer, so as to effectively ensure the family user's property and personal safety in real time.
The application bus system of the bus system in the smart cell can be expanded to 8 busses, 256 corridor units and 32 halls in the smart cell. Under normal circumstances, the 1-7 bus is mainly based on home alarms, and the 8th bus is mainly based on perimeter alarms.
In order to realize the unified management of the intelligent community, a central controller is equipped in the alarm management center, which is responsible for the unified collection and upload of the entire alarm system information to the computer center management software. In an emergency situation (computer power failure, crash) can work independently offline to complete the display and processing of alarm information. The alarm center software is installed on the management center computer and is responsible for the daily management of the entire alarm system.
For each house with 2 houses and 6 floors, for example, each unit is equipped with a unit controller for receiving and uploading information; 1 and 2 storey households are equipped with 1 user alarm host, 2 door sensors, and 2 pairs of infrared cameras. On the radio, 2 emergency buttons, 2 infrared sensors (according to the actual choice); 3, 4, 5, 6 households each equipped with 2 emergency buttons, 8 information encoder 1, responsible for the collection of 8 emergency Help.
For perimeter perimeter walls, monitoring can be performed through the eighth bus of the central controller. Take 32 pairs of perimeter detectors on the perimeter of the community as an example. A cell controller is configured in the entire cell wall to receive and upload information. Each perimeter detector configures a perimeter module for the detectors to collect alarm information. .
In the alarm control center of the community, one computer (with Poseidon control software installed) and a central controller are deployed. The central controller receives all the alarm information and prints it in real time. The central controller then uploads it to the computer. The computer processes the mass processing of the alarm information.
Application of bus system in other areas The hotel's emergency alarm system is based on hotel rooms. When the emergency button installed in the hotel room triggers an emergency distress signal, the information encoder installed in the hotel corridor will immediately receive an alarm. The signal is transmitted to the unit controller on the corridor through the bus, and then transmitted to the center controller by the unit controller. The center immediately sends an audible and visual alarm to display the detailed address of the alarm user (unit room number, zone orientation) so as to ensure effective and immediate guarantee. Your property and personal safety.
With the popularization of campus modernization, multimedia and audio-visual education equipment, higher requirements have been placed on facility prevention. As an important part of the intelligent security system, the establishment of a school intelligent alarm system is more and more urgent.
For campus management settings, infrared curtain detectors are installed in each window, and infrared wide-angle detectors are installed in each classroom. After the alarm, the host in the duty room can distinguish the location of the alarm to facilitate centralized management services. Bus intelligent alarm system can also achieve this function.
The bus system alarm system uses the school classroom or office as the alarm user unit. When a detector installed in a classroom or office detects an illegal intruder signal, it is converted into an alarm signal that can recognize the azimuth through the address module, and transmits the alarm signal to the alarm signal. The unit controller on the corridor is then transmitted from the unit controller to the center controller via the 485 bus. The center immediately sends an audible and visual alarm. At the same time, data is transmitted to the computer management software via RS232, and the detailed address of the alarm user is displayed on the electronic map (user Name, unit number, zone orientation, zone type), and the printer will print the alarm information to be checked immediately. The central value-keeper can only deal with it after being dealt with, so as to effectively ensure school property and personal safety.
In summary, the bus-based networked alarm system has the advantages of low cost of use and no need to pay for phone charges incurred by users when sending alarm messages, which satisfies the technical requirements of ultra-large-scale fleet users. Especially for one-off networking of large-scale residential areas, the single-device average equipment cost is lower than that of the telephone line networking system. Therefore, the bus-based networked alarm system can play a greater and better role in large and medium-sized establishments.