Intelligent analysis of weak systems general questions
Release Date:2014-07-07 15:04:07 Click rate:Common problem of all intelligent weak system
Each intelligent subsystems exist in the application of many complaints, nothing less, there are two reasons: one is the product performance; Second, the use of problem. The following lists interior security, intercom, CCTV surveillance, perimeter security, electronic patrol, meter reading systems and parking management systems.
An indoor security systems
False positives is the focus of the complaint, which product performance, operation related.
Indoor security systems is the highest rate of all the complaints system, the reason probably has the following five areas: 1 System improper selection, improper quality 2 probe, selection, installation location, 3 system hardware and software set unreasonable terms, 4 users improper use, 5 management is unreasonable.
Select the intelligent system, to meet the functional requirements of the premise, in fact, the choice of transmission media intelligence products, building security systems are no exception.
Currently, the district as intelligent network management system facilities, due to the constraints of intelligent products, has taken many forms wiring structure, but nothing more than these types of networks: telephone lines, power lines, cable (cable network) , green (five twisted pair cable), wireless, Ethernet (IP broadband network). Which is better choice in the end intelligent system, to decide according to the internal and external environment of the community and future development. When many users in the community, should not be used on telephone line security system, otherwise too much alarm, the monitoring center will cope, however, which led to complaints.
Vigorously promote the industry through practical application within the past five years and, in the construction of intelligent communities, we all know what features should have, what systems should be designed. This is a successful place, due to various factors, some companies in the construction of intelligent communities, with little regard for the people's living habits, the use of the characteristics of the external environment, the community and other factors to consider, is the security system has a user-friendly characteristics. Management of security systems should be strengthened after the completion of many systems, due to poor management, the result will become a "burden."
The designer of the equipment throughout the security sector must have a comprehensive understanding of, the user must have an understanding of the mentality, the mentality of a thief to have a certain understanding of the characteristics of the community to have an understanding that only the combination of these "four an understanding "in order to design a viable security system with user-friendly.
I think that security should be based on community-based prevention, the main purpose is to scare away thieves, rather than catch the thief to safety of the tenants first. If we catch the thief for the purpose, the owners will bring personal injury, and damage to the cell's atmosphere, the owners do not mind increased stability, so that is not conducive to the health of the owners, is not conducive to the Party's reputation and sales. When an alarm based on the above considerations, the home alarm system, buzzer should tweet, will scare away thieves.
Unlike residential building, no one was home when the user is away on business or household, security systems, false positives, or send the theft itself, the speaker kept chirping at home, how to do? After the event processing is over, how the system is re-armed state? To solve these problems, the system has a central arm / disarm feature. Security is a system of false positives and confirmed after processing please, can be re-armed state in the control center, so that the family household system, to accept monitoring. Similar incidents handled properly, owners and property management companies will be a lawsuit.
System malfunction inevitable false positives and owners, the key is how to deal with the owners to make satisfactory, good property management company. To solve this problem, the control center must have a false identification. When the owners of the home, the occurrence of false positives or owners misuse the system, causing the system alarm, this time at home tweet buzzer households, households usually immediately disarm, called upon to stop the buzzer. In the control center, an alarm occurs, the center will be receiving the alarm, disarm residents, the center will also know that when a household alarm to lift the alarm time is not more than 30 seconds (with a password arm / disarm the thief difficult 30 seconds within decipher passwords), can generally be considered part of such a false alarm caused by misuse or user, do not immediately dispatched security, instead of using other ways to visit the household, just in case.
When selecting anti-theft detectors, try not to use the microwave, regardless of the size of the radiation dose, the human body will produce harm. Depending on the circumstances, the choice of door sensor, magnetic window, glass break detectors, vibration detectors and infrared detectors. When selecting the detector, to make residents at home can arm, normal household activities will not cause an alarm, if the choice of infrared detectors, it should be the preferred intelligent curtain infrared detector. This infrared detector is designed for residential design set, directional, after arming, forming an invisible red facade. After deployment, tenants and usual activities at home, not alarm, when people walked from the living room balcony or window, the record from the inside out through the infrared curtain, not alarm, waiting for the owner to set a time out within the set time, the owner from the balcony into the room, and reached the infrared curtain, not alarm. However, if only from the outside inwards past the infrared curtain, soon the police. When selecting door sensor to note that due to the gap between household doors are generally beyond the scope of an ordinary door sensor required, while also taking into account not easy to destroy, recommend using the "needle" Magnetic, and pay attention to the middle.
Construction monitoring center computer room of the building must be required to build, especially point to mention is that there must be a UPS power supply, otherwise, once the power-down, the database is destroyed, will be implicated in a series of management problems.
Maximize the integration of security engineering, with the development of technology, security systems will become an application system on the community computer network (transmission medium is cable television or broadband IP network), which is a trend in the world today . Some people will improve system integration for the use of a one-sided understanding of the monitor and a set of software to monitor everything, in fact, this is a very wrong idea. Improve system integration in the community is intended to facilitate business and system integrators, refers to the physical transmission media integration, in the end according to the characteristics of people use to set how much monitors.
If you are using on-line patrol system, light patrol system would have to use a monitor to control the position of the security guards. Access management and perimeter defense alarm, intercom and burglar alarm systems gated and residents can share one monitor, to be determined according to the number of households, taking into account the response time of the alarm, generally 1000 share one monitor is reasonable. How much is mainly used to monitor the human eye by a closed-circuit monitor to decide.
Attendant monitoring center two is enough, one for access management and perimeter defense alarm system, intercom and security door control systems, alarm systems, and household Patrol Management System, and the other is responsible for CCTV .
In the control room, we must develop a strict management and operating procedures, but more important is to have a qualified software, system software is the core of intelligent residential property management system, which is directly related to the function of the whole system level. System software includes: computer and network operating systems, application software and real-time monitoring software. System software should have high reliability and security, should be easy to operate, using Chinese graphical interface, using multimedia technology, the system has the ability to handle voice and image. With the machine to adapt to the quality of the environment at different levels of households and property company personnel.
Second, the intercom system
Increase in complaints mainly in video intercom systems, video intercom signal transmission problems often led to increased household complaints.
In selecting the intercom and security door control system is to be noted that the production of such systems manufacturers now have a lot of quality problems in most systems after 1 year after use, maintenance so miserable Party, however, which also presents tremendous opportunities, this time discerning investor attention if technology can solve the technical problem at the root, after 2-3 years of Ebb Tide, it will become the industry leader.
If a multi-wire video intercom system, the construction should pay attention to when the video cable, audio cable and control cable separately, otherwise it will interfere with each other, especially in some communities, the central management unit on the gate for the gate drive this time the transmission distance, interference video cable and audio cable between each other very serious, video cable, and voice lines must be open grid or sub purchase a certain distance away. Digital video intercom system also have this problem, but is used to control the line of his less construction it convenient. Meanwhile, these two systems are present when the floor is too high, the image distortion problem, the main reason is that they are used in video transmission technology, when the transmission distance, the signal attenuation caused by badly. RF coaxial video intercom system can effectively solve this problem.
Coaxial Video Intercom System uses the same standard modulation technique television programs through cable network transmission of images, sound and data, video intercom system will also need common wiring pattern of traditional multi-core video cable and data lines changed a single coaxial cable wiring pattern, significant savings in construction costs and wire, will also transfer video distributor to ordinary visual theory and practice are more perfect TV cable signal amplifier, so that impedance matching problem in case of large users and a multi-level signal distortion amplified solved. Because coaxial video intercom system will be included within the scope of the decoder client, the video intercom system no longer needed in each layer (or several layers) plus a decoder, so coaxial video intercom video intercom system enables users in a large, long-distance, high-quality transmission possible. This video intercom system in Shenzhen and Qingdao, large-scale applications.
Now a popular trend in the household alarm systems and video intercom systems into one, it is a good idea, but most manufacturers of such products security systems, there is no standardized manufactured by the state, but Swing way, so that the Party and on its own is not good. Some manufacturers even advertised: Our video intercom products, you can do three-way free-call, you can call between households and households, and the price is about the same as the original product, in fact, a closer look and found it this function from theory terms can be, but is useless in practice. Intercom and security priority than the high priority calls between households, and each time, the rate of utilization and alarm intercom system will be relatively high, but only one user can talk, it's like quiz hotline Like dial rate is very low, so low dialed rate, coupled with not even be interrupted by normal use and alarm intercom system, it can be said that the household intercom functions between meaningful, if the household also paying for this useless feature, you do not say wronged wronged? Do call home and among households, from a technical standpoint, it is possible, do not blindly pursue low-cost, should be a lot of attention about the quality of the product.
Video intercom products trend towards broadband coaxial systems and the development of IP systems, video intercom and security while two functions into one is a development direction.
Third, closed-circuit monitoring system
In fact, closed-circuit monitoring role in security aspects of a large, if not the system, no matter how well interior security, thefts still continued. As long as the thief entered the cell, he somehow managed to steal something, or even robbery. Security guard or to the outdoor-oriented.
In the design of closed-circuit monitoring system, to meet the requirements of the situation, minimize the use of cameras, but in the case of a last resort, do not use lightly with PTZ camera, first, PTZ easily broken, and the second, when the lens is rotated back and forth when the control center is not conducive to observation, third, a head of the price is not much cheaper than a video camera, the people are generally not easily accessible, but also safe and more important places, such as near the perimeter, with the band video central processor mobile monitoring function, as long as the object moves, the central police immediately.
According to the author (Soneir Zhang) experience, it is recommended to consider in the current high-end community a DVR, the best selection of Multivision Canada DVR, remote, LAN, Internet, telephone monitoring, operation, not only embodies the grade, and very practical. And I personally do not recommend the use of a matrix to achieve closed-circuit monitor, because the matrix is more difficult to grasp, programming difficult, especially for the security operation is relatively difficult, the problem is not easy to rule out, as far as possible using the image processor, both real-time monitoring can also be real-time video, this effect is more ideal. System is designed so that both the color camera, there are black and white cameras, both hard disk recording, another analog video, both benefits and costs.
Fourth, perimeter protection system
An intensive microwave perimeter protection system is generally used for military and other critical sectors, vibration sensor type perimeter defense systems, generally used for relatively large range of communities, local perimeter without rules, for example, a mountain valley villa areas. General perimeter defense systems are based on infrared shooting in this mode, when using this mode in the north to pay special attention, because the winter under the snow will be shooting probe "blindfolded" to make the system out of action, the general and outdoor monitoring systems used in conjunction to make up for its deficiencies. If you add lights linkage in perimeter defense systems, wonders when the situation occurs, the lights immediately started a bunch of light shot in the past, will make the thief tremble with fear. Do not pay attention to sound the alarm linkage, otherwise it will disturb residents to rest and create a tense atmosphere.
Fifth, the Patrol System
The reason Patrol System generates complaints are two kinds: one system instability; 2 patrol points set unreasonable, irrational software settings .. Must be equipped with software functionality and residential property management systems combine can not be stereotyped, otherwise, the system is not easy.
Six, automatic meter reading system
Automatic meter reading system for all subsystems complaint rate is higher, mainly due to inaccurate data cc, followed by inadequate water supply and power supply network.
In addition to the indoor security systems, is the highest complaint rate of the system. The main reason is the meter reading system needs further improvement.
Most intelligence community remote meter reading system consists of four parts: management center computer, transmission controllers, collectors and various meter. Via RS485 bus, power line carrier, wireless data transmission, urban telephone service, cable television and broadband IP networks and other means of communication, due to the different communication media, has been divided into different metering modes between them.
More concentrated among residential meter installation, acquisition and transmission controller can be transmitted via RS485 or manner of power carrier. In Table scattered residential installation between acquisition and transmission controller is best transmitted through the telephone network or data transmission. In the case of three tables or table has been home, the best use of two-way cable network meter reading or meter reading by way of broadband IP network. When using power line carrier transmission should be noted that due to the country's power grid in the process of transferring data often disrupted radio signals, electromagnetic signals, pulse signals, resulting in data transfer error codes, lost code situation, so power line carrier in China's development is not very suitable.
In recent years, the construction of intelligent residential district developed rapidly in our country, from the coastal economically developed areas in Shenzhen, Guangzhou, Shanghai to Beijing, as well as the western Chinese city of Chengdu, Chongqing, Guizhou, Kunming and other places have varying degrees of intelligent building demonstration area. These intelligent residential quarters building, improve the quality of life of residents, expanding the living space tenants, local intelligent building played an exemplary role.
However, in the construction of intelligent systems, there are also bad points, such as the application of the three-meter remote metering system can not run normally, still using manual meter reading. If this situation is not resolved, it will certainly affect the development of intelligent residential quarters in the country, affecting the enthusiasm of developers, the impact of real-life households.
Causes inaccurate meter has two: one is disturbed when the data transmission; 2 pulse water meter, gas meter problem itself the product table..
Since most meter reading system, are given in Table read pulse, the pulse in the process of transmission is vulnerable to interference, resulting in meter reading errors. To prevent this from meter reading errors, you must adopt such a meter reading system, the data acquisition device placed header, the header between the collector and the collector is transmitted through simple Transmission Control Protocol, which can effectively prevent the transmission of data process due to interference, caused by meter reading errors. Such meter reading system consists of five parts: the computer center management, transmission control, acquisition, and various header collector meter.
The following from the pulse itself to find a cause. Sensor generates a pulse on the pulse table can be divided into: reed type, the Hall element type and the photoelectric conversion type. Hall element type basic principle is: the ordinary turntable count meter (or natural gas meter) in the installation of the Hall element and a magnet, can constitute a power conversion technology based on magnetic sensors. The Hall element is fixedly mounted in the vicinity of the turntable technology, a permanent magnet installed in the art disk position on each revolution of the turntable when the permanent magnet through a Hall element, the signal is measured at the end of a pulse is generated. Reed count fixedly mounted near the turntable, a permanent magnet mounted on the counting tray position, when the turntable each turn, a permanent magnet through a reed that is generated at the end of a metering pulse signal. The basic principle is that the photoelectric conversion: a photoelectric converter mounted on the turntable of the meter, there is a groove on the turntable, the turntable revolution, the groove after photoelectric conversion, to complete a photoelectric conversion to output a pulse.
The number of pulses to determine the accuracy of the accuracy of the remote metering system. Actual construction completion from the current point of view, remote gas meter, high accuracy pulse meter. Meter situation is not satisfactory, even very bad. There are two main reasons: the quality is not high reed, pipe water hammer, issued a large number of pulses (increased pulse).
Pipe system, if the occurrence of transient flow flow, flow rate, pressure and other parameters are pipe flow changes over time, which changes depending on the magnitude of the initial flow state pipe flow, pipe system characteristics, factors such as transient formation conditions. A series of dramatic changes in pressure caused by the flow rate of mutation alternating movements of hydraulic shock phenomenon, rattling sound of pipes and larger will occur, a phenomenon called water hammer. In everyday life, we often encounter situations pipes shake violently and audible, which is water hammer phenomenon. It is this drastic shake caused reed reed in a very short time, frequently pull, a large number of pulses issued.
In the remote metering system, the majority of the pulse meter inaccuracies are caused by the above reasons. The situation has seriously hampered the development of remote metering system.
Water hammer phenomenon causes extremely complex relationship with both the pipe wall friction, pressure, liquid flow rate, etc., we can not solve the problem fundamentally. However, in practice, we increase the pulse width, to filter out some of the noise. We can in hardware and software, the judge set a certain function to filter out false pulse. Thus, the data we collected from the front on the more accurate.
Currently, the domestic quality remote meter really worrying, has seriously hindered the development of the three tables remote system. To fundamentally solve the problem, we must start from the principle, developed a new type of remote gas meter, electric meter and gas meter. Let the meter is not "water hammer" effects of the phenomenon, such as photoelectric sensor tube. So remote table numbers instead of directly to the output pulse, the output of digital and mechanical, like reading, and then reading devices installed directly in the header, so the header control through certain communication protocols and acquisition of communication, so that almost makes remote one hundred percent accurate meter reading system.
Currently, most of the meter reading systems on the market are the above problems, and those who solve these technical problems, the water can dominate the market, this is indeed a rare opportunity!
In terms of Guangzhou, three table cc most obvious problem is that power supply bureau allowed to copy the meter, the meter must be used to specify header water company, I hope you pay attention.
Seven, parking management system
The reason the complaint is allowed parking time data, followed by the product of poor quality, often wrong, resulting in an unstable system performance (vehicles reasons).
Mechanical part of the basic tricks parking management system, and its electronics needs further improvement. Electromagnetic interference is relatively large parking lot, in the transmission lines, we must take measures to shield, while improving communication patterns between the read head and the computer can not only read data, there should be some communication protocols to prevent interference. When you start the car, the interference is relatively large, it should be stopped to take the card and pay when transferring data in the car. In short, technically, electronic parts to improve its response.
HongHao Photoelectric technology lighting co.,LTD