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 hundreds of 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, etc. There are two main categories of alarm information transmission methods.
One is a wireless alarm host. The advantage is that it is easy to install, saves wiring, and saves installation costs. Especially when monitoring the distance from the host to a few hundred meters or even several kilometers, using a wireless host is currently the most feasible and most economical solution. 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. Particularly, the frequency close to or the same as the receiving frequency will directly cause the communication distance of the entire wireless alarm system 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 the transmission at the same time, the host may receive only the 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 cabling 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 method? The bus method is generated under such a development background. The bus method is essentially a wired method, but the bus method can save the wire cost to a maximum degree. It is the ideal networking method for large-capacity alarm systems.
The characteristics of the bus system alarm system
Looking at the existing domestic and foreign bus system networking alarm systems on the market, there are generally the following deficiencies: lack of cost-effectiveness, alarm information transmission is slow and error-prone after the increase of nodes in the network, and the wireless transmission part of the user's machine is vulnerable to interference by wireless signals. 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;
Alarm information is printed immediately 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-made network alarm system is based on home users. When a detector installed in the home user detects an illegal intrusion or emergency distress signal, the alarm host installed at the home user will immediately send the alarm signal to the bus. The unit controller on the corridor is transmitted to the center controller by the unit controller. The center immediately sends out sound and light alarms. At the same time, the data is transmitted to the computer management software via RS232. The detailed address of the user is displayed on the electronic map (user name, The unit number, zone location, zone type), and the printer will print the alarm information immediately to be checked, and the central value-keeper can only deal with it after release, thus effectively ensuring the home user's property and personal safety.
Application of Bus System in Intelligent Community
The bus system can be expanded to a maximum capacity of 8 buses, 256 corridor units and 32 buildings per corridor in an intelligent community. 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. (Detailed configuration as shown in Table 1)
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 plot as an example. A cell controller is configured in the entire cell wall and is responsible for receiving and uploading information. Each perimeter detector configures a perimeter module for the radio detector to collect alarm information. . (Detailed configuration is shown in Table 2)
In the district's alarm control center, 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 of alarm information. (The detailed configuration of the central control room is shown in Table 3)
Bus system in other fields
Hotel emergency alarm system is based on the hotel room, when the emergency button installed in the hotel room triggers an emergency distress signal, the information encoder installed in the corridor of the hotel receives the signal, and immediately transmits the alarm signal to the corridor through the bus. The unit controller is then passed to the center controller by the unit controller. The center immediately sends an audible and visual alarm to show the detailed address of the reporting unit (unit room number, zone orientation), so as to effectively ensure the property and personal safety of the guests.
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 alarm position and 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 reporting unit. When a detector installed in a classroom or office detects an illegal intruder signal, it is converted into an alarm signal that can identify the orientation through the address module and transmits the alarm signal. The unit controller on the corridor is transmitted to the center controller by the unit controller through the 485 bus. The center immediately sends an audible and visual alarm. At the same time, the data is transmitted to the computer management software via RS232, and the detailed address of the reporting unit is displayed on the electronic map. (User's name, unit number, zone orientation, zone type), and the printer will print the alarm information immediately to be checked, and the central value-keeper can only deal with it after being processed, so as to effectively guarantee the school property and personal safety in real time.
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, etc. There are two main categories of alarm information transmission methods.
One is a wireless alarm host. The advantage is that it is easy to install, saves wiring, and saves installation costs. Especially when monitoring the distance from the host to a few hundred meters or even several kilometers, using a wireless host is currently the most feasible and most economical solution. 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. Particularly, the frequency close to or the same as the receiving frequency will directly cause the communication distance of the entire wireless alarm system 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 the transmission at the same time, the host may receive only the 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 cabling 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 method? The bus method is generated under such a development background. The bus method is essentially a wired method, but the bus method can save the wire cost to a maximum degree. It is the ideal networking method for large-capacity alarm systems.
The characteristics of the bus system alarm system
Looking at the existing domestic and foreign bus system networking alarm systems on the market, there are generally the following deficiencies: lack of cost-effectiveness, alarm information transmission is slow and error-prone after the increase of nodes in the network, and the wireless transmission part of the user's machine is vulnerable to interference by wireless signals. 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;
Alarm information is printed immediately 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-made network alarm system is based on home users. When a detector installed in the home user detects an illegal intrusion or emergency distress signal, the alarm host installed at the home user will immediately send the alarm signal to the bus. The unit controller on the corridor is transmitted to the center controller by the unit controller. The center immediately sends out sound and light alarms. At the same time, the data is transmitted to the computer management software via RS232. The detailed address of the user is displayed on the electronic map (user name, The unit number, zone location, zone type), and the printer will print the alarm information immediately to be checked, and the central value-keeper can only deal with it after release, thus effectively ensuring the home user's property and personal safety.
Application of Bus System in Intelligent Community
The bus system can be expanded to a maximum capacity of 8 buses, 256 corridor units and 32 buildings per corridor in an intelligent community. 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. (Detailed configuration as shown in Table 1)
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 plot as an example. A cell controller is configured in the entire cell wall and is responsible for receiving and uploading information. Each perimeter detector configures a perimeter module for the radio detector to collect alarm information. . (Detailed configuration is shown in Table 2)
In the district's alarm control center, 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 of alarm information. (The detailed configuration of the central control room is shown in Table 3)
Bus system in other fields
Hotel emergency alarm system is based on the hotel room, when the emergency button installed in the hotel room triggers an emergency distress signal, the information encoder installed in the corridor of the hotel receives the signal, and immediately transmits the alarm signal to the corridor through the bus. The unit controller is then passed to the center controller by the unit controller. The center immediately sends an audible and visual alarm to show the detailed address of the reporting unit (unit room number, zone orientation), so as to effectively ensure the property and personal safety of the guests.
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 alarm position and 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 reporting unit. When a detector installed in a classroom or office detects an illegal intruder signal, it is converted into an alarm signal that can identify the orientation through the address module and transmits the alarm signal. The unit controller on the corridor is transmitted to the center controller by the unit controller through the 485 bus. The center immediately sends an audible and visual alarm. At the same time, the data is transmitted to the computer management software via RS232, and the detailed address of the reporting unit is displayed on the electronic map. (User's name, unit number, zone orientation, zone type), and the printer will print the alarm information immediately to be checked, and the central value-keeper can only deal with it after being processed, so as to effectively guarantee the school property and personal safety in real time.
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.
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