【 Weak current College 】 intelligent building weak electricity design problems of all kinds

Intelligent building weak electricity design problems of all kinds
The intelligent subsystems in application many complaints, none would have two: one product performance; the second is to use. The following lists indoor security, intercom, closed circuit monitoring system, perimeter security, electronic patrol, meter reading systems and parking management system.
A, indoor security system
False positives are the focus of complaints, and product performance and operation.
Indoor security system is that all systems with the highest rate of complaints, probably has the following five aspects: 1 system selection, 2 probes for quality, selection, installation located 3 system hardware and software settings are unreasonable, inappropriate use of 4 users, 5 management methods are not rational. intellectualization system of choice, to meet the functional needs of the premise, in fact, is the intelligent choice for product transfer media, the security system of the building is no exception.
Currently, the community network as intelligent management system supporting facilities, due to the constraints of intelligent products, take a variety of forms of wiring structure, but nothing more than a network: the phone line, power line and cable (cable TV network), green (5 double gum line), wireless, Ethernet (IP network), etc. How to choose which type of intelligent system better, according to the community's internal and external environment and future development decisions. When many users within the community, should not use security system based on the phone line, alarm points, monitoring center will meet, causing complaints.
Over the last five years of practical application and the industry's efforts in building intelligent communities, we all know should have what features should be designed which systems. This is successful, due to various factors, some companies in the construction of intelligent communities, rarely consider all lifestyle, use features, community of internal and external environmental factors to consider, is the security system has user-friendly features. Security system management should be strengthened, many system built later, due to the neglect of management, the result turned out to be the "white elephant".
Designers must be on the entire security industry equipment to have a comprehensive understanding of the consumer mentality to have an understanding of, on the thief's mentality to have some understanding of the characteristics of the community to have an understanding that only the combination of these "four understand" can devise practical Humanized's security system.
I think that communities of security should be on prevention, the main purpose is to scare away thieves, not catching thieves, to the safety of the tenants as first. If to catch the thief, brought to the owner, and destruction of personal injury to the community, the owners do not increase the stability of mind, then, is not conducive to owners of physical and mental health, nor to the party's reputation and sales. Based on the above considerations, the home of the alarm system beep, beep, beep should scare away the thief.
Residence is different from the Office, when user home is no people or families on a business trip, the security system is positives or being a theft events, home of the Horn calls the? finished in event handling, how to make a defense system is again? to resolve these problems, the system has a central cloth/disarmed features. Security confirmation is the system of false positives and processed please, you can control centre so that tenants home system is a defense, accept the monitoring. Similar event handling is not good, owners will and litigation of property management companies.
Systems of false positives and owners misoperation inevitable, the key is how lets owners satisfied with good management, property management company. To resolve this problem, the control centre must have false positive identification function. When the owners at home, the positives or mishandling, causing the system to beep and the household's buzzer, households will normally be disarmed, the buzzer immediately stop call. In the control center, beep, the Center will receive the warning, households removed immediately, the Centre will also know that when a household alarm time to unlock the warning does not exceed 30 seconds (with password cloth/disarmed, the thief is very difficult to crack the passwords within 30 seconds), you can view these positives Aviso or user misoperation caused by security without immediately, instead of using other means of access to the tenants, just in case.
In the select anti-theft detector, try not to use the microwave, no matter the size of the radiation dose, will produce harm on the human body. Depending on the circumstances, the choice of door sensor, magnetic window, glass break detectors, vibration sensors and infrared detectors, etc. In the select probes, the household at home can be a defense, household normal activities do not cause alarm, if you choose to use an infrared detector, should also be preferred intelligent screen curtain infrared detector. The infrared detector is designed for residential design, directional, defense, forming a invisible red wall. Defense, households can at home and the usual activities, no alarm, when people go from the living room balcony or window, inside out invasive too red waimulian, not the police, the master set a time to wait outside, at a set time, the master of the House from the balcony, and through the Red Waimulian, not alarm. But if you are just straight in from the outside through red waimulian, soon the police. In the select a magnetic belt when, because of household door gap generally exceeding the normal scope of a magnetic belt requirements, while also not easy to break, it is recommended that a "pin" magnetometer, and pay attention to.
The monitoring center of the building must be computer room construction requirements for construction, in particular, to the point raised was that certainly must have a UPS power supply, otherwise, once the power-off, the database is compromised, will be linked to a series of management problems.
Maximize security engineering integration, as technology evolves, the security system will become community computer network of an application system (transmission medium for cable television network or broadband IP network), this is a trend. Some people will increase system integration one-sided understanding to use one monitor and a set of software to monitor everything, in fact, this is a very bad idea. Within the community to improve the system integration is designed to facilitate business and system integrators, refers to the transfer of physical integration on the media, in the end how muchMonitors the use of the human characteristics.
If you are using the on-line patrol system, light patrol system to use one monitor in order to master security officer position. Import/export management and perimeter control, alarm, intercom and door handles and household alarm system can share one monitor, according to the number of households to determine, taking into account the alarm response time, generally to 1000 families share one monitor more reasonable. Closed circuit monitoring of the number of monitors is primarily used by the human eye.
The monitoring center of attendance for two is enough, one responsible for import/export management and perimeter control, alarm system, intercom and door control system, household and alarm system and patrol management system, the other a CCTV system.
In the monitor room, must establish strict management and operational rules, but more important to have qualified software, system software is community property management intelligent system's core, it features a direct relationship to the entire system of standards. System software including: computer and network operating system, application software and real-time monitoring software. System software should have very high reliability and security, ease of operation, the use of Chinese graphic interface, the use of multimedia technology, so that the system has a processing capacity of sound and image. Use machine environment to adapt to different levels of household and property company personnel's quality.
Second, intercom system
Complaints increased mainly in the intercom system, the Talkback signal transmission problems, leading to frequent complaints of households.
In the select the intercom and door control system is necessary to note that now the production of this type of system manufacturers have many, most of the system in use after 1 year after it has the quality problem, maintenance, but the party a pain in the neck, which also contains a huge opportunity, and this time there are eyes of investors if you can pay attention to technique, fundamentally solve the technical problems, after 2-3 years of ebb tide, it will become the industry leader.
If you use multiple wire intercom system, pay attention to when in construction will video cables, audio cables and the control line, otherwise interfere with each other, especially in communities that will manage machine is placed in the center of the gate for the gate of the machine, the transport distance, video and voice line mutual interference is serious, video and voice lines must be driving a distance or off separately. Digital intercom system also exists, but is he the control line, construction convenient. At the same time, these two systems are present when the floor is too high, image distortion problem occurs, the main reason is that they are used for video transmission technology, and when transport distance, is badly signal attenuation. Coaxial RF video intercom system can effectively solve the problem.
Coaxial video intercom system and standard TV the same modulation techniques, through cable TV network transfer images, sounds and data, ordinary Visual intercom system also needs a video cable and multi-core data cables of traditional wiring pattern into a single coaxial cable wiring, construction costs savings and wire, while ordinary Visual video distributor to theory and practice are better cable TV cable signal amplifier, allowing large user instances of impedance matching and signal distortion of multi-level zoom problems immediately after. As coaxial RF video intercom system be decoders into indoor machine, video intercom system is no longer needed at each level (or several layers) attach a decoder, coaxial RF video intercom system make the intercom in large users, long-distance, high-quality transmission possible. This Visual intercom system currently in Shenzhen and Qingdao mass application.
Now pop a trend, the tenants and alarm system and video intercom systems into one, this is a good idea, however, most manufacturers of such products in the security system, there is no specification for manufacturing by country, just look so swing on the party and on their own are bad. Some manufacturers even beat out advertising: our video intercom products, you can do third-party free call, households and families can make a call, and the price and the original product is almost, in fact, look closely, found it this functionality in theory but in practice it is useless. Interphone and alarm priority than the priority of calls between households, and every moment, intercom system usage and alarm rate is relatively high, and only one user can call, this is like guessing hotline, call rate is low, the low rate of dials, and not have to be intercom system for normal use and alert is interrupted, it can be said that the household of intercom between functional sense, if the tenant had to pay this useless feature, you said not wronged wronged? do households and households between calls, from a technical sense, not blind pursuit of low prices, should pay more attention to the quality of the product.
Video intercom products have to coax RF systems and broadband IP system development trend, alarm and video intercom two functions into one is also a development orientation.
Third, closed circuit monitoring system
In fact, closed circuit monitoring role in the safety precautions, if not quite the system, the indoor security doing good, theft is still ongoing. The thief as long as into the community, he must try to steal something, even a robbery. Security or to outdoor precautions. In the design of the closed circuit monitoring system, to meet the requirements of the case, use the camera, but also in the case of last resort, easily do not use with PTZ camera, PTZ, first to bad, the second, when the lens up and down the rotation, the monitoring centre is not conducive to observation, third, the price of a head or a cheaper than cameras, in general do not easily reach people, and on safe and relatively important places, such as perimeter nearby, with video mobile monitor function of the central processor, as long as the object moves, the Center immediately to the police.
According to the author's experience, it is recommended that the current high scale community consider 1 DVR, you can implement remote, LAN, Internet, telephone monitoring, operation, which not only embodies quality, but also very practical.While I personally do not recommend matrix for closed circuit monitoring system, because it is more difficult to grasp, matrix programming difficult, especially in terms of security, relative operation difficult problems difficult to exclude possible picture processor, can real-time monitoring, real-time video can also be the ideal effect. This design system with colour camera, and a black and white cameras, hard disk video and analog video, taking into account the benefits and costs.
IV. perimeter protection system
Microwave network-perimeter protection system typically used by the military, and other vital sectors, motion sensing-perimeter defenses more system, generally used for community-wide, perimeter and irregular areas, for example, a ravine in the Villa area. In General, the more the perimeter defense systems are based on infrared correlation which, in the North to adopt this pattern with extreme caution, because the winter snow will be covered for shooting probe "," make the system less effective, and outdoor surveillance system, to make up for it. The more the perimeter defense systems if you join the lighting linkage, wonders, and when the lights get started, a beam of light shot past the ferocious, will make the thief. Attention alert don't sound linkage, otherwise it will disturb household rest and create a tense atmosphere.
Fifth, patrol system
Patrol system generates complaints because there are 2: 1. system instability; 2. patrol point settings are not reasonable, software settings are not reasonable. Software functional equipment must and community of property management systems, cannot be the same, otherwise, the system just doesn't work.
6. automatic meter reading system
Automatic meter reading system is all subsystem complaint rates are relatively high, the main reason for this is the CC data, followed by water and electricity networks are not perfect.
In addition to the indoor security system, it is this system with the highest rate of complaints. Mainly due to the meter reading systems need to be further improved.
Most intelligent communities in remote meter reading system consists of four parts: the central computer, the transmission controller, collector and all kinds of meters. They can be through RS485 bus, power line carrier, wireless, local telephone network, cable television and broadband IP networks, and other means of communication, because of the different communication media, and is divided into different metering mode.
In the table install more concentrated residential areas, the acquisition and transmission controllers can RS485 or power line carrier transmission way. In the table install the scattered residential areas, collection and transport controller-preferably through data transmission or telephone network for transmission. For a third table, or table has been home to the best use of two-way network through cable TV or broadband IP network meter reading meter reading mode. In the use of power line carrier transmission time to note that because our power grid in the transmission of data, often by a radio signal, electromagnetic signal and pulse signal interference, led transmit data error codes, lost codes, power line carrier in China's development is not well suited.
In recent years, the intelligent housing community building in China developing rapidly, from coastal economy developed region, with Shenzhen, Guangzhou, Shanghai to Beijing, and China in the Western City of Chengdu, Chongqing, Guizhou, Kunming have varying degrees of building a community of intelligent demonstration. These intelligent housing community building and enhancing the quality of life of the household, expanded the tenants of residential space, as local smart construction played a role model.
However, in the construction of intelligent systems, there is not satisfactory, if the application has three tables remote metering system is not functioning properly, still use manual meter reading. In this case if not addressed, will affect the intelligent housing community development in China, developers, tenants of real life.
Produce a meter reading will not be allowed to two reasons: 1. data transfer is interrupted; 2. Pulse water meter, electricity and gas in the product table itself.
Since most meter reading systems, meter reading pulse, pulse in the transfer process is vulnerable to interference, leading to reading table error. To prevent this kind of reading table error, you must use the meter reading system, the data acquisition device is placed in the header, the header collectors and collector room through a simple transmission control protocol for transmission, which can effectively avoid data during the transfer process, due to interference caused by reading table error. Such a reading system is composed of five parts: the central computer, the transmission controller, collector, header collector and all kinds of meters.
Following reasons from pulse to find itself.　Pulse meter pulse sensor on the produce can be divided into: Reed pipe, Hall element type and photoelectric conversion type. Hall element-basic principle is: the count of ordinary dial meter (or gas) equipped with Hall element and magnets, to constitute the Magnetoelectric conversion technology-based sensors. Hall element fixed installation near the technology turntable, magnet installed in technical disc bit, when the turntable, each round magnet after Hall element once the signal-to-end produces a metering pulses. Do a Reed pipe fixed installation near the count wheel magnet plate installed in the count, when the turntable on every round, magnet after Reed pipe once the signal-to-end produces a metering pulses. Photoelectric conversion basic principle is: the turntable in meters at a photoelectric converters, dial has a Groove, Rotary lap, Groove through opto-electrical converter, complete a photoelectric conversion, output a pulse.
Pulse number of accuracy will determine the accuracy of remote metering system. From the moment of the actual construction was completed, remote gas table, the accuracy of pulse meters high. Water meter is unsatisfactory, even very bad. There are two main reasons: Reed pipe quality is not high, water hammer occurred, substantial impulse (increasing pulse).
Pipe system, if there is fluid transient flow, flow velocity, pressure, and other parameters are changing with time, their variations depending on the initial fluid pipe flow, pipe system characteristics, transient formation conditions and other factors. Due to changes in flow rate caused by a mutation in a series of rapid alternating movements of the hydraulic pressure shocks, the pipeline will occur violent vibration and a lot of noise, this phenomenon is known as the hammer. In daily life, weOften meet water violent shaking and audible, which is the hammer. It is this shakes created a Reed pipe Reed in a very short time, frequently snap-action, issuing a lot of pulses.
In the remote metering system, water meter pulse inaccuracies are mostly caused by the above. These circumstances have seriously hindered the development of remote metering system.
Hammer causes extremely complex, and internal friction, pressure, liquid velocity and so have the relationships that we are not able to fundamentally resolve the issue. But in practice, we increase the pulse width, to filter out some clutter. We can in the hardware and software, setting up a certain amount of judgment function, to filter out false pulse. In this way, we from front-end acquisition of data is more accurate.
At present, domestic water meter for quality really worrying, have serious hindering three table remote system development. To fundamentally solve the problem, you must start from the principle, the development of new types of remote transmission of gas, electricity and gas in the table, the table. Let water meters are not affected by the "water hammer" phenomenon, for example, using a photoelectric sensor tube. Enable remote table directly output numbers instead of pulse, output of digital and mechanical readouts, and then set the reading device for direct installation in the header, the header control through certain communication protocols and collector communication, so that almost makes remote meter reading system 100% accurate.
At present, most reading system are present above, if who solved the above problem, water can dominate the market, this is indeed a rare opportunity!
In Guangzhou, the third table CC most obvious problem is that power is not allowed to cut electricity meters, water meters must use water company specified header, I hope everybody's attention.
Seven, parking management system
Complaints cause is not allowed to stop time data, followed by the product quality is not good, often wrong, causing the system performance is not stable (vehicle).
Car park management system of mechanical part of the Basic that their electronic parts need to be further improved. Car park of electromagnetic interference, in line, be sure to take the shielding measures, while improving the read head and computer communication mode, you cannot read the data, you should have some communication protocols to prevent interference. Car on startup, the interference is relatively large, it should be in the car stopped quka and paying, to transfer the data. In short, technically, should improve the electronic part.