In recent years, the building video intercom system, as a part of building intelligence, has become an organic component of residential construction, and has played an active role in the security of residential quarters.
After more than ten years of development, the building intercom system has developed from the initial single-family type and unit type to the current bus networking type, and its function has also developed from the initial voice intercom to the current visual intercom with security function, Community intelligent management system with functions such as short message publishing.
demand analysis
It can realize the visual intercom between the entrance and exit of the community and the residents, the stairway and the residents, the management center and the residents, the visitor's voice and image can be clearly confirmed, and the residents can call for help through the emergency button *. The system has eight custom defense zone alarm functions.
The community is an intelligent community with closed management. The building video intercom is a system that accounts for a large investment in the community’s intelligent system. The selection of equipment should be economical and cost-effective.
The specific technical requirements are as follows:
1. Use environmental conditions
Ambient temperature: -40℃～+45℃(outdoor equipment) -10℃～+45℃(indoor equipment)
Relative humidity: 10%～95%
2. Appearance and structure requirements
(1) The outer surface of the plastic shell: flat and smooth, free of cracks, fading, permanent stains, and no obvious deformation (shrinkage) and scratches.
(2) The outer surface of the metal shell: flat, without obvious deformation and scratches, and the surface coating can not expose the underlying metal, and there is no blistering, corrosion, nicks, burrs, corrosion spots, sand holes, and coating shedding.
(3) Buttons and switches: The operation should be flexible and reliable, the parts and components should be fastened without looseness, and the marks should be clear; the seals should be clear, and the product certificates and labels should be clear, not misunderstood, and not easy to wipe.
(4) Protection capability: the mainframe and power boxes installed outdoors should meet the requirements of IP33; extensions, management machines, modulators, decoders, video distributors, sensor reading heads, power boxes, alarm input devices, and alarm output devices should Meet the requirements of IP30; the host shell should have protective measures to prevent abnormal disassembly.
(5) Logo: The following clear and permanent logos, product specifications and models, power supply ratings and main technical indicators should be provided. All manual control devices should be clearly marked with their purpose or pictorial symbols; corresponding characters or numbers should be marked near the terminals; wires should have numbers, colors or other marks.
3. Stability requirements
(1) System continuous working time: under normal weather conditions, continuous working for 168h, there should be no failure (GA/T269-2001).
(2) System cycle working time: Selective calling, talking, and electronically controlled unlocking under rated voltage, 600 cycles, due to power failure or mechanical failure, there should be no equipment damage or contact adhesion, and the key characters are clearly identifiable .
(3) Mean time between failures: Under normal working conditions, the average is not less than 5000h.
4. System configuration requirements
(1) Management center: A color visual management center machine is installed in the management center, and the management center machine conducts visual intercom with the door phone of the household through the system connection, so as to realize the mutual call and conversation function between the user and the center.
(2) Building unit door: A visitor intercom door phone with a black and white camera head is installed at the door of each building unit for users to confirm the identity of the visitor and unlock the unit door. The user can monitor the situation of the door, and can directly talk to the management center; set a personal unlocking password to unlock the door of the access unit; in addition, the owner can use the set ID card to unlock the access control by swiping the card.
(3) User indoor unit: Install a black-and-white indoor intercom video user indoor unit with monitoring function in each user's residence, which can not only unlock the door, but also directly call the management center in a hands-free state. Can actively call residents, the system requires emergency button to realize emergency help.
5. Basic functional requirements
(1) Call function: After the host and extension are connected, two-way conversation can be realized, the voice quality is clear, and there should be no ringing.
(2) Monitoring function: After the host and the extension are connected, the real-time images of visitors captured by the host can be monitored on the extension monitor to identify the visitors.
(3) Networking function: Two-way conversation can be realized between each extension and the management machine.
(4) Emergency call function: When an emergency occurs in the household room, an emergency call and the address code corresponding to each household can be sent to the management machine through the extension.
(5) Information release function: The management center should be able to send pictures and text messages to the indoor unit. The indoor unit can display information content on a full screen.
(6) Alarm function: professional zone alarms can be set up in the households, and multiple alarm interface methods such as emergency buttons, infrared detectors, gas detectors, door and window magnets can be provided, and alarms can be sent to the property immediately when an intrusion occurs inside the house In the security center, the indoor unit should have security functions.
(7) Access control function: The online network access control function can be realized through the intercom system equipment.
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Commodity
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High alumina
ball
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Appearance
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Faint yellow
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Al2O3 Content (%)
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≥70%±2%
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Bulk Density
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3.02(g/cm3)
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Water absorption
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<0.01(%)
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Degree of hardness (MOhs)
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8
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Use raw material
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Fining high bauxite
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Formation way
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Isostatic pressing
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High Alumina Ball 30
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Shanxi Ruineng Ceramic Material Co.,Ltd , https://www.rnceramic.com