The indoor burglar alarm system adopts the HRVS system, and in the case that the system communication protocol cannot be known, the attempt to connect the main line of the long-distance transmission of the system is successful. At the same time, the color video building intercom system of another famous international brand also tried to transmit image signals by optical fiber connection without the knowledge of the system communication protocol, and the image clarity and stability. Both have greatly improved than the original, and achieved satisfactory results. Since the use of each system, the operation is stable and reliable, and good results have been achieved.
The area is adjacent to the seashore, and its distinctive feature is that the area is large. All residential buildings are composed of 4 to 6 (or 6+1) multi-storey residential buildings with a wide distribution area. The monitoring center is located on the edge of the northwest corner of the residential area. In the building, it is relatively remote, and the weak systems of the community are inevitably faced with long-distance transmission of system signals. The HRVS system is used for the indoor anti-theft alarm system of the community. Although the system belongs to the CAN bus structure, the use of ordinary cables has little effect on the long-distance transmission of the system signals. However, due to the rising price of copper-core cables, video surveillance, and intercom and intercom systems, which also transmit long-distance signals from the same starting point to the monitoring center, also use optical fiber transmission, adding a system for fiber transmission, and only in the optical cable. Add a core. Therefore, in order to reduce the system cost, optimize the system structure, improve the system's anti-interference and corrosion resistance, the engineers finally decided to use the fiber transmission scheme in the HRVS indoor alarm system.
The copper core cables of the front-end equipments of different systems inside and outside the cell are aggregated through the weak cells of the respective units, and then the copper core cables are used to summarize the "building unit" units through the outdoor pipeline. After the copper core cables of each system are integrated into the weak room of the building group, different types of optical transceivers are configured according to the functional requirements of different systems. The HRVS system as the CAN bus structure should use the CAN optical transceiver, and adopt the outdoor single-mode optical fiber and the terminal of the monitoring center equipment room. Device connection.
A schematic diagram of a system using the HRVS system indoor anti-theft alarm system is shown in Figure 1.
In order to facilitate commissioning and future maintenance, a system distributor UT-509 is generally adopted in 3 to 4 units. For a room with 2 2 ladders and 2 households combined with one unit weak room, "series connection" can be used. (ie, the CANOUT end of the last zone module of one ladder and two households and the CANIN end of the other one ladder of the same unit door are connected by the respective vertical pipes in the weak room of the basement). If there is only one unit left after the configuration of a building group, in order to save a system distributor UT-509, the method of "cascading" (through the outdoor pipe) can also be adopted.
The front-end equipment system connected to a system distributor UT-509 of the HRVS system is complicated. In accordance with the requirements of the technical defense regulations at that time, the infrared curtain detectors were installed as the intrusion alarms for the first and second floor households of each unit: the balcony, the window of each household, and the doors and windows of all the houses leading to the public walkway. Each household's living room and main bedroom are equipped with an emergency alarm (help) button device. Each household adopts a HRVS 1511 alarm host (keyboard) as an indoor anti-theft alarm system, and each four households adopt a HRVS-1230 splitter. For households with more than three floors, an emergency alarm (help) button device is installed in each living room and main bedroom, and the HRVS-1306 six-zone module or HRVS-1304 four-zone module is used as the anti-theft alarm controller. The front-end equipment described above for each unit is connected to the system distributor HRVS-1210 via the HRVS-1230 splitter. After careful observation and analysis, it is found that the first alarm signal in the system can be sent, received and alarmed in time, but if the second alarm signal is sent immediately after the first signal, or several alarm signals are sent at the same time, There will be a phenomenon of sending and receiving and not reporting; if the second alarm signal is delayed by a certain time than the first alarm signal, the system will not generate a false negative phenomenon. This is the case when the system status is normal when the adjustment is made.
In order to solve this problem, after many analyses and tests, it is found that whether the second alarm signal is sent immediately after the first signal, or several alarm signals are sent at the same time, the alarm signal is sent to the central alarm controller. UT-1204, except that the system only processes the first alarm signal and does not respond to other signals. This made the staff realize that it was caused by the HRVS system's communication protocol.
In order to make the system adapt to the communication protocol of HRVS, the system structure shown in Figure 1 is analyzed in detail, and it is found that the whole system is connected with the central alarm controller UT-1204 through the CAN optical transceiver (it is connected by hand). However, if we do not use fiber optics, the entire system should be connected by hand with the system distributor UT-509 and connected to the central alarm controller UT-1204. Then, is the above-mentioned missing report phenomenon caused by the uncoordinated connection between the CAN optical transceiver and the central alarm controller UT-1204? Therefore, some adjustments are made to the system architecture shown in FIG. Between the CAN optical transceiver and the central alarm controller UT-1204, a structure connected by the system distributor UT-509 and connected to the central alarm controller UT-1204 is added. After several different types of tests and debugging, The above-mentioned false negative phenomenon has been solved, and a satisfactory effect has been obtained.
The area is adjacent to the seashore, and its distinctive feature is that the area is large. All residential buildings are composed of 4 to 6 (or 6+1) multi-storey residential buildings with a wide distribution area. The monitoring center is located on the edge of the northwest corner of the residential area. In the building, it is relatively remote, and the weak systems of the community are inevitably faced with long-distance transmission of system signals. The HRVS system is used for the indoor anti-theft alarm system of the community. Although the system belongs to the CAN bus structure, the use of ordinary cables has little effect on the long-distance transmission of the system signals. However, due to the rising price of copper-core cables, video surveillance, and intercom and intercom systems, which also transmit long-distance signals from the same starting point to the monitoring center, also use optical fiber transmission, adding a system for fiber transmission, and only in the optical cable. Add a core. Therefore, in order to reduce the system cost, optimize the system structure, improve the system's anti-interference and corrosion resistance, the engineers finally decided to use the fiber transmission scheme in the HRVS indoor alarm system.
The copper core cables of the front-end equipments of different systems inside and outside the cell are aggregated through the weak cells of the respective units, and then the copper core cables are used to summarize the "building unit" units through the outdoor pipeline. After the copper core cables of each system are integrated into the weak room of the building group, different types of optical transceivers are configured according to the functional requirements of different systems. The HRVS system as the CAN bus structure should use the CAN optical transceiver, and adopt the outdoor single-mode optical fiber and the terminal of the monitoring center equipment room. Device connection.
A schematic diagram of a system using the HRVS system indoor anti-theft alarm system is shown in Figure 1.
In order to facilitate commissioning and future maintenance, a system distributor UT-509 is generally adopted in 3 to 4 units. For a room with 2 2 ladders and 2 households combined with one unit weak room, "series connection" can be used. (ie, the CANOUT end of the last zone module of one ladder and two households and the CANIN end of the other one ladder of the same unit door are connected by the respective vertical pipes in the weak room of the basement). If there is only one unit left after the configuration of a building group, in order to save a system distributor UT-509, the method of "cascading" (through the outdoor pipe) can also be adopted.
The front-end equipment system connected to a system distributor UT-509 of the HRVS system is complicated. In accordance with the requirements of the technical defense regulations at that time, the infrared curtain detectors were installed as the intrusion alarms for the first and second floor households of each unit: the balcony, the window of each household, and the doors and windows of all the houses leading to the public walkway. Each household's living room and main bedroom are equipped with an emergency alarm (help) button device. Each household adopts a HRVS 1511 alarm host (keyboard) as an indoor anti-theft alarm system, and each four households adopt a HRVS-1230 splitter. For households with more than three floors, an emergency alarm (help) button device is installed in each living room and main bedroom, and the HRVS-1306 six-zone module or HRVS-1304 four-zone module is used as the anti-theft alarm controller. The front-end equipment described above for each unit is connected to the system distributor HRVS-1210 via the HRVS-1230 splitter. After careful observation and analysis, it is found that the first alarm signal in the system can be sent, received and alarmed in time, but if the second alarm signal is sent immediately after the first signal, or several alarm signals are sent at the same time, There will be a phenomenon of sending and receiving and not reporting; if the second alarm signal is delayed by a certain time than the first alarm signal, the system will not generate a false negative phenomenon. This is the case when the system status is normal when the adjustment is made.
In order to solve this problem, after many analyses and tests, it is found that whether the second alarm signal is sent immediately after the first signal, or several alarm signals are sent at the same time, the alarm signal is sent to the central alarm controller. UT-1204, except that the system only processes the first alarm signal and does not respond to other signals. This made the staff realize that it was caused by the HRVS system's communication protocol.
In order to make the system adapt to the communication protocol of HRVS, the system structure shown in Figure 1 is analyzed in detail, and it is found that the whole system is connected with the central alarm controller UT-1204 through the CAN optical transceiver (it is connected by hand). However, if we do not use fiber optics, the entire system should be connected by hand with the system distributor UT-509 and connected to the central alarm controller UT-1204. Then, is the above-mentioned missing report phenomenon caused by the uncoordinated connection between the CAN optical transceiver and the central alarm controller UT-1204? Therefore, some adjustments are made to the system architecture shown in FIG. Between the CAN optical transceiver and the central alarm controller UT-1204, a structure connected by the system distributor UT-509 and connected to the central alarm controller UT-1204 is added. After several different types of tests and debugging, The above-mentioned false negative phenomenon has been solved, and a satisfactory effect has been obtained.
Melamine Plywood/MDF,Melamine Board,Plywood With Melamine Finish,Melamine Coated Plywood
LINYI JIUHENG IMP&EXP CO.,LTD , https://www.jiuhengwood.com