【 Weak current College 】 100 ask smart home

<br> for the popularity of intelligent home and extend the concept of smart home life, Smart Home Network in China April 16, 2009 order of the smart home frequently asked questions, and "smart home" 100 Questions and plane in the form of printed publication through the website .. .1 What is the concept of smart home? .According to the latest definitions (China Smart Home Network April 15, 2009), Smart Home is a residential platform, the use of integrated wiring technology, network communication technology, security technology, automatic control technology, audio and video technology will be the home life .infrastructure integration, build efficient residential facilities and family schedule transaction management system, improve home safety, convenience, comfort, artistic, and achieve environment protection and energy to live. .2, what are called smart home method? .Smart home, said the most common methods include smart homes, in English common Smart Home. .The meaning of the smart home home automation also similar (Home Automation), e-home (Electronic Home, E-home), number of homes (Digital family), home network ((Home networking), home network (Network Home), Intelligent .Home / Building (Inte1ligent home / building), in Hong Kong, Taiwan and other regions there are the digital home, digital home and other known method. 3, smart home use environment in different terms in the voice that? smart home, there are two expressions in fact .semantics described in the definition, and we usually are referring to the residential smart home environment, both individual residential smart home (known as smart home), but also implemented in the real estate community-based Intelligent Community .platform for smart home projects, such as smart home, Shenzhen Mangrove West Coast. The second semantics refers to the smart home system products, manufacturers from smart home, smart home integration to meet the requirements for the major features of the products, these products should be integrated .Installation complete, so full of smart home systems products should include hardware products, software products, integration and installation services, after-sales services including a complete process. 4, Smart Home origins? the 20th century, early 80s, with the .extensive use of electronic technology in the home appliances market, residential electronic (HE, Home Electronics) appears. the mid-80s, will be home appliances, communications equipment and security equipment, disaster prevention function independently integrated into one, the formation of the concept of home automation ( .HA, Home Automation). 80 end of the decade, due to the development of communications and information technology, there has been a variety of residential communications, home appliances, security monitoring devices via bus technology, control and management of the commercial system, which in the United States known as the Smart .Home, which is now a prototype smart home. 5, the first intelligent home-related standards? 1979, Stanford Research Institute United States proposed to control household appliances and electrical equipment, the family line of integrated bus (HOMEBUS), and set up .research will study the corresponding 1983 American Electronics Industry Association began the development of family organizations, specialized agencies electrical design standards, and in 1988 for the preparation of the first family residential electrical design standards, namely: "Home Automation Systems and Communication Standard" ., also called home bus system standard (HBS, Home Bus System). in the development of norms and standards in the design, intelligent residential electrical design must meet the following three conditions, namely: l have a family bus system; l through .home bus system provides a variety of services; l other than energy and housing connected to the outside world. 6, a mature application of smart home products? X-10 is the first use of wires to control the lighting and electrical and electronic products (we are now .products known as electronic carrier), and as smart home products to the commercial mainstream. Pico Electronics Ltd. successfully developed the technology, and the technology was sold to well-known audio company BSR. X-10 is .60 Hz (or 50 Hz) for the carrier, and then to 120 kHz pulse modulated (Modulating Wave), the development of a digital control technology, and to formulate a set of control specifications. X-10 modules in 1978 by the .Sears introduced the United States, Radio Shack began selling in 1979, while the module products; BSR audio company closed in 1990, X-10 modules of the previous research and development staff will buy the technology and the establishment of new companies in the United States, .Company name and product line are named X-10. Today, X-10 is not only a company in the United States is also a home automation control specification name. the United States many large companies such as Radio Shack, Stanley, Leviton, Honeywell are .selling X-10 products, X-10 manufactured by a series of home automation products, such as light switches, remote controls, security systems, TV control interface, computer control interface, call the reactor (Telephone Responder), etc. .. many U.S. manufacturers of home automation products are also used X-10 control specifications to produce its product, X-10 control the size of today's American home automation became a major leader in the control specifications. 7, the main use of smart home technology? integrated .routing technology, network communication technology, security technology, automatic control technology, audio and video technology. 8, smart home system consists of major subsystems? home wiring systems, home network systems, smart home (central) control management systems, home lighting control .systems, home security systems, background music systems, home theater and multimedia systems, home environmental control systems such as the eight systems. where smart home (central) control management systems, home lighting control systems, home security system is necessary systems, home wiring .systems, home network systems, background music systems, home theater and multimedia systems, home environmental control systems for the optional system. 9, smart home can provide the service? 1) always-on network services, and connected to the Internet at any time, for the home office .provides a convenient conditions. .2) security: Intelligent Security for real-time monitoring of illegal intrusion, fire, gas leak, emergency call from occurring. .Once the alarm, the system will automatically send alarm information to the center, while start-related electrical status into the emergency response, enabling proactive prevention. .3) intelligent control of consumer electronics products. .4) interactive intelligent control: via voice recognition technology voice features intelligent appliances; through a variety of active sensors (such as temperature, sound, movement, etc) smart home initiative action response. .5) Environmental Automation. .Such as home central air conditioning system. .6) provide a full range of home entertainment. .Such as home theater systems and home central background music system. .7) The modern kitchen environment. .Mainly refers to the whole kitchen and the whole bathroom. .8) Family Information Service: management of family and community information and property management company. .9) Family financial services. .Through the network to complete financial and consumer services, 10) Automatic maintenance functions: intelligent information appliances connect the server directly from the manufacturer's service site to automatically download and update drivers and diagnostic procedures, implement intelligent fault diagnosis, automatic expansion of new features .. .10, what kind of residential environment can be called smart home? .Smart Home found: Only a complete installation of all necessary systems, and at least an above optional optional smart home system can be called intelligent home. .That is, must all be installed smart home smart home (central) control and management system, home lighting control systems, home security systems, at least to install home wiring systems, home network systems, background music systems, home theater and multimedia systems, home environmental control .a system. .11, whether a single residential installation of smart home? .Yes, both the independent villas, townhouses, or multi-storey residential high-rise residential, SOHO or even places, LOFT space, can install and use smart home. .12, intelligent home can be used as part of the Intelligent Community? .Yes, the real estate business can be the smart home system per household as the Intelligent Community of the overall integration of a subsystem of the project. .In this case, the intelligent home control and management of both the individual and also to exchange information with the intelligence community, and become the property management of a terminal. .13, the smart home should be a unified real estate developers to install? .Not necessarily, some high-end commercial housing projects, especially villa project developers in order to provide more scientific and technological content, more luxurious, more comfortable products supporting the residential renovation added a smart home system, but most of the commercial housing in exchange .When House did not include smart home system, and users who want to use the smart home system, you can choose the appropriate system from Smart Home Contractors door installation. .14, real estate, residential project in the design and installation of smart home should be when? .Best practice is to project planning and design of residential real estate on the introduction of smart home concept, the smart home into areas of refined decoration, the unified design, unified construction, unity promotion, has continued to sell even after the sale of property management .go. .15, residential real estate projects in the smart home can be customized menu of it? .Yes. .Buyers can purchase the residential real estate to its smart home system, custom, custom smart home not only to the subsystem, and can choose the grade of product configuration. .Custom in the subsystem, the necessary system must be selected, the optional system needed the flexibility to choose preferences. .16, the application of smart villas or high-rise residential homes and multi-application smart home What's the difference? .Is very different. .Home smart home applications are complete smart home system, especially domestic environmental control system will be widely adopted, such as central air conditioning, hot water, central management, energy management systems, garden irrigation systems, small-scale weather system, perimeter anti-theft alarm system .these are rarely used multi-storey or high-rise residential to. .In addition, due to large area, more rooms, villas and also by telephone switching system. .Of course, the large area of the multi-storey or high-rise residential area networking is often installed video intercom system type, and usually only single-family villas visual intercom system. .17, Smart Home Products Where to buy from? .Although users may purchase smart home products, according to the instructions for installation (which is often said of DIY), but we do not recommend doing this, the best ordered directly from the same brands where the intelligent selection of local installers to come home installation. .Smart Home from China, users can select Network www.smarthomecn.com brands and smart home installers. .18, what kind of product called the smart home system products before? .Products in the smart home system identification, we believe that manufacturers of smart home (smart home systems products) must belong to the necessary systems to achieve the main function of the intelligent home, be referred to as intelligent home. .Therefore, the intelligent home (central) control management systems, home lighting control systems, home security systems can be directly called smart home (smart home system products). .The optional systems can not be directly called smart home, intelligent home can only be used with the specific expression system, a combination of methods, such as background music system, called Smart Home background music. .Some of the vendor or installer optional system will direct called smart home products, is a misleading user behavior. .19, what vendors offer smart home products? .Smart Home is a multi-industry, cross-cutting areas, and IT, network, home appliances, electrical, intelligent building, security, home decoration has a relationship, the companies from these areas can enter the field of production and marketing of smart home smart home products .Of course, there are a number of years ago, was founded in 2000 specializing in the production after the smart home system product manufacturers. .20 What famous domestic brand of smart home? .China now has hundreds of smart home manufacturers, which have a certain brand awareness are more than fifty, included in the index of thousands of intelligent home monitoring of brand brand thirty, respectively, on the Haisuo Bo, Qingdao Haier, housing treasures .Tianjin Swiss francs, Honeywell, LG Smart Home, Crestron, wave of the CIT, An Mingsi, Bticino, Hui Juzhi energy, Nico, Wei Yi, Pu Lite, Xiamen Zhenwei, rain reading, Inno .Smart, Chi Mak, Rui information technology, MOX, Matsumoto intelligence, of real intelligence, intelligent inventions, Thai Ton, poly Hui E, Advantech, east HDL, Branch of the house, Branch Road, intellectual, Qingdao Hisense. .21, how to get the dynamic information of smart home brand? .30 mainstream domestic brands are included in the smart home lab thousands of brands of the brand index monitoring, monthly for its brand recognition, brand strength, brand active force, to monitor and distribute the brand reputation index ranking, released the official website: index .. qianjia.com. .22, the new brand to brand index to the smart home to monitor the list? .Brand new brand of history is not long since, brand awareness is not high, to achieve brand index monitoring conditions will take some time, the brand index system every six months to monitor list of brands will conduct a review, for the rapid growth of new brands, will also take .included. .Since joining the list of brand index monitoring is no charge, so whether or not included in the monitoring of thousands of brands by the brand-building based on actual laboratory comparison of decision. .However, the brand new brand can take the initiative to contact the pilot, to submit detailed information on the brand. .23,2008 Brand Award Top Ten List of Smart Home? .First Mingsuo Bo; second Honeywell; third housing Po; fourth Ming Haier; fifth Mingrui Lang; record sixth wave; seventh general Lite; eighth Hui Juzhi energy; s .Matsumoto first nine world; tenth Zhenwei. ."2008 Outstanding Contribution Award for smart home": LG Electronics. .24, Ten Smart Home Brand Award is about? ."Ten Smart Home Brand Award" is the smart part of building Brand Award by the China International Intelligent Building Summit Organizing Committee and the Joint Laboratory of thousands of brand selection and award. .Selection rules: the annual Brands Index Ranking, online surveys, user feedback, expert appraisal result from ranking results, and the China International Intelligent Building Summit announced the results and awards. .25, intelligent home how to install? .By a local installer of smart home site installation. .Smart Home from China, users can query the smart home network www.smarthomecn.com installer information. .26, Smart Home User can install? .A small number of smart home products purchased and installed by users themselves, but we do not recommend this for two reasons, first, strong systemic smart home, the operator of the installation are higher, up to the smart-home arrangements through Certified Installer .professional training to install smart home installation engineers, installation requirements and safeguards in order to achieve stable operation. .27, how to choose a qualified installer of smart home? .The mainstream smart home installers have thousands of brand laboratory certified Smart Home Network in China in 2009 jointly launched the "Smart Home Certified Installer" certification program. .Certified installer of smart home is a professional design and installation of the power of Smart Home, smart home has some experience in construction and installation, the use of sophisticated smart home system products, service protection, and accept the industry watchdog. .Select this smart home installers, to protect the interests of users. .Smart Home from China, users can query the smart home network www.smarthomecn.com certified installers list. .28, smart home business how to apply for certified installers? .Applicant must meet the following conditions can apply for "Smart Home Certified Installer" Certification: ① legal entities; ② has been engaged in the business of intelligent home design and installation of more than one year; ③ at least one person received a "Smart Home Certified Installer" certification system .approved certification training smart home; ④ smart home projects at least two cases. .Contact: China's Smart Home Network "Smart Home Certified Installer" project department. .Address: No. 89 Zhongshan Road, Guangzhou, China Software Park C, 301 King (PC 510630) Tel: (020) 8,556,342,285,563,412 Fax: (020) 8556346929, how to supervise and inspect the smart home installers certified? .① smart home installer certification shall submit a quarterly project schedule. .② smart home installer is responsible for personnel certification program for smart home each year to conduct a certified installer to install the level of quality and service checks, and brand the user satisfaction survey. .③ certification through the first 12 months after the submission of certified smart home during the installation of the annual project report. .30, and under what circumstances smart home installer certification will be disqualified? .Following the abolition of the "smart home installer certification" status: ① Failure: "Smart Home Certified Installer" certificate expired, not to submit annual reports in January and renewals, in which case the certificate expired as automatic failure, failure certificate number .and business name will be released in China, intelligent home networks, enterprises will also benefit from the list of smart home installer to delete the database the corresponding region. .② failed: The certificate is in force, smart home installer certification program, or three times a responsible officer or thousands of customer complaints received by the brand monitoring system to monitor brand laboratory certified to the three of negative brand business information (including fakes, construction quality ., service level issues), the smart home installer certification program will directly inform the responsible officer certification business, the reasons for this failure, decertification, and cancel the certificate information in the smart home network in China announced the list of enterprises also benefit from the installation of Smart Home .Business database corresponding regions deleted. .31 smart home decoration company can install it? .Of course, as long as the installation with the appropriate technical capacity to home decoration works during the same time smart home installation. .And because of the home, decorated with a deep understanding of and installation experience in the smart home installation can be done with less. .32, computer systems integrators to install smart home do? .Of course, as long as the installation with the appropriate technical capabilities, we can project some real estate smart home system design and installation, and with broadband access systems, property management systems, integrated installation. .33, Security Contractors can install the smart home do? .Of course, as long as the installation with the appropriate technical capabilities, we can project some real estate smart home system design and installation, and video intercom system with cell, Card / parking management system, monitoring system, burglar alarm .systems, property management system integration, intelligent cell function. .34, smart home system service and maintenance is how to do it? .When the real estate business in the development of a unified installation of smart home system, after the completion of the project sales property management company responsible for the smart home system, after-sales service and maintenance, the property company will contact the manufacturers and installers certified smart home maintenance and repair work. .User-certified purchase and installation of intelligent home through the installation of intelligent home provider, direct contact with manufacturers. .35, what is the home wiring system? .Is installed in the residence, according to Standard home wiring cabling system, mainly used to support voice, data, images, video, multimedia, home automation systems, environmental management, security, audio, TV, probes, alarm and radio services. .36, what is the TIA / EIA 570-A standard household wiring? .May 1991, the United States Standards Committee (ANSI) and the TIA / EIA TR-41 Committee's TR-41.8 TR-41.8.2 Chapter of the working group worked out the first ANSI / TIA / EIA 570 standard household wiring. .But with the continuous development of new technologies, smart home cable for communications bandwidth requirements are high, ANSI / TIA / EIA 570 cabling standards getting home can not meet the demand for intelligent residential home wiring, so that urgent calls for new .Standard home wiring to adapt to the continuous development of new technologies. .Therefore, in September 1998, TIA / EIA Association officially revised and updated the standard home wiring, and redefine the standard ANSI TIA / EIA 570A standards home telecommunications cabling (Residential Telecommunications Cabling Standard). .37, home wiring and cabling is the difference? .l Home l wiring does not involve commercial buildings not involved in home wiring home telephone wiring in the home wiring outside the number of partakers level l, while the cabling is not recognized grading interface l home wiring, including fiber optic cable, coaxial cable, three and five .unshielded twisted pair (UTP), and integrated coaxial cable wiring is not included. .l fixtures, wiring, such as radio, the fire will be included 38 sensors, smart home will need to use home wiring system? .Not necessarily. .As smart home technology used in the different standards and protocols, most of the smart home wiring systems are integrated, but a few may not be integrated wiring system technologies, such as power line carrier. .39, home wiring system include? .Home wiring system, including transmission media, connectivity modules and conversion modules, patch cords, parts distribution management center, a distribution management center which is also known as home wiring box, wiring in the home box to complete the main home wiring management operations. .40, what is the home wiring box? .Home wiring box is the home wiring center management device, usually connected and manage module configuration box, communication modules, video modules, network modules, sound modules, system sockets, cables, intelligent management system, part of the family. .41, home network system include? .Home network is within the family (extended to neighbors, community) to PC, telecommunications, home appliances, security systems, lighting systems and wide area networks connected to a new technology. .Home network is a multi-subnet structure of the underlying protocols were used a mixture of different networks, and local area network (LAN) and wide area network (WAN) compared to the system configuration, network protocols and user groups has its own characteristic ways, the future home .networks must provide complete system integration solutions, high degree of interoperability and flexibility as the network interface. .Currently used in the home network connection technology can be divided into "wired" and "wireless" two broad categories. .Cable solutions include: twisted pair or coaxial cable, telephone cable, power cable, etc.; wireless solutions include: infrared connection, radio link, based on RF technology, connectivity and PC-based wireless connectivity. .Telephone network to the home network should also be included in the scope, when the residential (especially villas and other residential area of particularly large) using a telephone exchange or a small switchboard, these telephone interface wiring to the home wiring system must be integrated into the management. .In the future, communication networks and the further integration of computer networks, telephone exchanges within the family through the IP network will be completed when the phone will also be a telephone network. .In the Internet era, the home network must also be connected to the Internet, so that the family is not only a network of family, is the Internet family. .Accordance with common understanding, home computers, broadband Internet access devices, home network equipment, home digital processing equipment, home storage devices are all home network system components. .42, what is the telephone exchange? .Program-controlled digital telephone exchange programs is the use of electronic computer-controlled digital telephone switches. .SPC is the control mode, program-controlled manner can also be used for non-digital switch, the analog switches. .Digital switching applications and analog switch controlled by the principle is the same, digital switching is directly digitized voice signals to be exchanged. .Program-controlled digital telephone exchange in addition to a telephone exchange of the basic functions, but also has the following new features: speed dialing, hotline services, alarm services, call transfer, call waiting, call back busy, three-way calling, conference calls, Disturb service .the absence of customer service, look for malicious calls, no answer transfer, malicious call tracking. .<BR> Small, family-oriented, small business units with a small telephone exchange, also known as telephone switches, PBX. .43, the family home areas of intelligent broadband access is it? .Yes, the home broadband access network is part of the family, and home network system is a subsystem of the intelligent home, so families are intelligent home broadband access areas. .44, online shopping, online video on demand, online banking, online office are intelligent home areas it? .Does not belong to, these are Internet content, any one device can be connected to the Internet can achieve these functions, and not unique to the smart home system, so this is only the properties of the Internet, rather than the properties of intelligent home, some .real estate business will be online shopping, online video on demand, online banking, online office as a selling point of smart home is an irresponsible and misleading conduct, is typical of the practice of substituting one concept. .45, digital TV video on demand, digital TV smart-home interactive content category you belong to? .Does not belong to, these are digital TV content, as long as the digital TV operators launched video-on-demand digital television, data, interactive TV content, any digital TV users can enjoy these services, and whether the installation and use of smart home system has nothing to do. .46, what is the smart home (central) control management system? .Smart Home (central) control management system is the intelligent home of the "brain", all the subsystems will be access to the control center, Smart Home (central) control and management system usually contains a smart home management software (standalone or embedded software .motherboard), complete equipment management, scene setting, energy management, schedule management, security arm and disarm, security monitoring and management, property management services and other management operations. .47, a complete smart home system must have a smart home (central) control management system? .Yes, the lack of intelligent home (central) control of the intelligent home management system is incomplete, but also can not be effectively managed, will not be able to system integration, upgrades and other operations. .Therefore, it is recognized real estate development projects of smart home, smart home (central) control management system is investigated as a major assessment of subsystems. .48, what is home lighting control system? .Home lighting control system according to environmental changes, the objective requirements, user demand and other conditions intended to automatically collect information in a variety of lighting systems, and information collected from the corresponding logical analysis, reasoning, judging, and the analysis required .in the form of storage, display, transfer, job status information corresponding feedback control to achieve the desired control effect. .Home lighting control system is not a home lighting system, lighting system is light, lighting and related accessories, but the home lighting control system also includes a dimming module, switch module, the control panel, liquid crystal display touch screen, smart sensors, programming port, clock manager .and other equipment. .In accordance with the narrow understanding of home lighting control system is not included in the light source lighting systems, lamps, wires and other equipment. .Conversely, no production of home lighting control system, but only produce light, lighting products, enterprises, not belong to intelligent home manufacturers. .49, what is the home security system? .Intelligent home security technology is the essential technology system in the area and indoor video intercom, home monitoring, home security alarm, and family-related areas such as district card has a wide range of applications. .Therefore, the home security system is a member of the family the safety of equipment and installation of protective security and alarm systems, including indoor video intercom, home monitoring, home security protection, home monitoring and alarm equipment, perimeter intrusion detection and alarm .home security management system. .A complete home security system should and residential and community alarm center connected to achieve linkage alarm. .50, smart home system must be installed home security system? .Yes. .Security is an important feature of smart home environment, safety security system is the best choice. .Thus, a complete smart home system home security system must have. .51, what is the video intercom system? .Video intercom residential tenants and visitors is the voices of image communications system. .It is the first residential tenants the security of intrusion defense. .Set by the system, residents can be at home, with a video intercom extensions, can be located in front of the unit floor, video intercom door host, talk with visitors and extension through the images on the screen, to identify visitors .. .When the visitor is identified, household use of extension on the lock master control key, open the cell floor, electric door locks on the host, allowing visitors to enter; Otherwise, all non-unit building and the strange visitors who are .can not enter. .This ensures the convenience and safety of residents. .52, video intercom system with smart home (central) control management system is installed together? .Can. .Video intercom indoor practice with smart home (central) control and management system mounted in a control box to wall or touch-screen installation, many current smart home brands have adopted this approach. .53, smart single-family home in video intercom system, video intercom system with the community What is the difference? .Single-family home in intelligent video intercom system only for a single residence, small, simple installation, and without area networking. .Community video intercom system is an important residential property management support system to achieve the district network, so a larger scale, the system is relatively complex, residential video intercom systems are usually installed by the unity of the real estate business. .54, what is the home monitoring system? .Monitoring equipment used to conduct the residential indoor and outdoor surveillance, recording, transmission and linkage alarm system, known as the home monitoring system. .Home monitoring system, including cameras, monitors, recording equipment, network transmission equipment, alarm interface module, due to the popularity of home computer use and the widespread use of broadband, the widely used network webcam + reserved + + sms or network transmission .phone alarm mode, and these methods can be integrated into the smart home system, as a functional module inside. .55, what is family security protection? .Home security protection actually contains two meanings, one theft, and second, to avoid unnecessary injury protection losses. .This includes both specific products, such as security doors, security windows, safe, also includes some security products and measures, such as rail safety nets, child crash partitions, electrical protection locks, electric locks on the children, the other ., also refers specifically to intelligent home security system management module. .56, what is the home security alarm? .Home security alarms, including door and window magnetic switch alarm, infrared alarm, gas leak alarm, smoke alarm, glass break alarm, emergency alarm button, and home security supporting the community, including residential security alarm monitoring security, patrol, wireless intercom and elevator buildings ., water supply, power supply monitoring. .Therefore, home security alarm products are alarm host, door / window sensors, glass break detectors, smoke detectors, gas leak detectors, motion sensors, flood light and motion sensors, home care products, anti-rob alarm, etc. .. .57, what is the door alarm magnetic switch? .In residential or windows may be installed at the entrance door sensor magnetic detectors, door or window is opened in the armed state, the sensor will signal transmission room security management system control center, alarm information and activate the appropriate alarm operation. .58, what is the active infrared detectors on the radio? .Active infrared detectors on the radio transmitter and receiver by the two parts, the transmitter emission modulated by the two beams of infrared light, infrared two protected areas form the probe. .If someone attempts to cross the protected area, the two infrared was also blocked, an alarm signal receiver, the host received an alarm signal sound, if there are birds (such as birds, pigeons) flying over the area to be protected, because of its small size .in the protected area, only one block infrared rays, the transmitter that the normal, not to alarm the host send the alarm signal. .Modulated infrared light source is to prevent sunlight, lighting and other external interference sources, but also prevents interference was malicious use of infrared light probe work. .At the same time on the radio for the electronic equipment in the outdoor, stolen once they climb up the windows, walls, electronic radio signal is detected, the alarm host by way of pre-set the alarm sound, and thus advance the alarm time will be stolen by an effective shield .outdoors, and the timely deployment of personnel to deal with police intelligence, the ultimate purpose to protect the property. .59, what is a passive infrared detector? .Passive infrared detector is the human body by detecting the infrared emission to the work. .Detectors collect infrared radiation and then gathered outside to the infrared sensor. .Infrared pyroelectric sensor commonly used components, such components in the received infrared radiation temperature changes will be sent out the release of charge, after detection of an alarm. .This detector is based on detection of human radiation targeting. .Therefore, on the wavelength of radiation sensitive element of about 10μm to be very sensitive to infrared radiation. .In order to infrared radiation on the human body sensitive to radiation in its face to face is usually covered with a special filter, the interference by the environment obviously control. .Passive infrared detector, the sensor consists of two series or in parallel to each other pyroelectric element. .And two electrodes made from the opposite direction, environmental background radiation, the pyroelectric element of the two almost have the same effect, to produce a pyroelectric effect cancel each other out, so no signal detector output. .Convenient, fast. .DLP projector technology is reflective projection technology, is now the projection of the rapid development of technology..