Beijing Olympic Games events of alarm system construction

The Olympic Games is a four-yearly world event, each country of the successful bid will impose large amounts of human, material and financial resources to show their best face to greet the guests from all over the world.

So decisive position will also push the air waves, particularly in the "counter-terrorism" new forms, such as the 2004 Athens Olympic Games is "armed to the teeth". The 2008 Olympic Games held in the footsteps of the approaching, in August of this year's security engineering Olympic venues have also been fully set out to build, including 14 alarm system.

Stadium security facilities in order to safeguard competition, the opening, conduct and closure of the evacuated safety, ensure successful events.

The alarm system is the first line of barrier protection, when perimeter illegal intrusion, the detector will issue the warning information, through the center of the controller and linkage equipment for the Centre to know the scene, while the system automatically turns on the lights and sound and camera equipment to illegal intruder deter, prevent illegal personnel over the wall or fence. It can be said that the alarm system like "Golden Shield" in General, a foreign unsafe removal in the stadiums.

First, the environmental characteristics of the Olympic venues

In order to achieve a safe, convenient, efficient and multifunctional sport environment, you must fully integrated sports complex security needs, and comprehensively improve the ability of the comprehensive preventive and gymnasium, sports management provide a strong protection.

Olympic Stadium is a rather exceptional public buildings, the main objective is to attend a sports event held, on the basis of its construction and usage, you can sum up the Olympic venues have the following distinctive features:

1. officers of the highly centralized and sparse

First Olympic sites belong to large integrated public facilities, the building was designed to guarantee a comprehensive, high-level sports event held successfully.

According to its usage we can do both. We all know, when the event, venue, the passenger is in a short time a large number of staff turnover, leading to the venue and external environment to become very complex, which greatly increases the complexity of the security system operation. On the other hand, if the active end, crowds, security facilities there would be no activities so prominent, people traffic suddenly reduced security system will be primarily for cultural activities, exchange of personnel, fitness and leisure, social services, and provide security to enhance the safety, security, theft protection items, etc.

2, site of the opening and closing

Olympic Games venue is usually chosen in a city centre, the city's downtown, with convenient traffic, the flow is large.

Design and construction of the Olympic Stadium, the venue around the perimeter and away from the Office will stay relatively wide open area, belonging to the open building. However, the Olympic Games, the discrepancy is not arbitrary and the Olympic venues, on access to guests and belongings will have strict checks and manage to eliminate undesirable elements carrying dangerous goods into. The game held at venues around 50 m and 100 m also can not arbitrarily close, climbing. Venues outside of the building are two: one is to establish solid isolation zone, such as the installation of fences and other barriers; The second is reserved for large public areas, maintaining an open design.

3, the security system of strict and overall appearance

Olympic Stadium, from the function of the event venue, but its design is also one of the Olympic base image elements that convey the Olympic Games to play and the host country culture an important role.

The previous contract for the construction of the venue is the pursuit of spatial structure novel, unique, attractive, buildings and structures of seamless. In order to guarantee the smooth running of the race, and strict security system alike. And often security products look simple, color, single, main emphasis on the practical end, so the installation of the devices, taking into account the overall appearance.

Due to various alarm detector sensor component, it works differently affected by environmental change impacts vary, so select alarm detector, you need to take full account of the use of environmental conditions.

According to choose the right probes are guaranteed alarm system work effectively.

Second, the Olympic Stadium alarm system components and features

Alarm system is the use of detectors will be a range of perimeter control, and connect to the Central Administration of the computer, when the alien invaders over the fence, fence, the detector will immediately send the alarm signal to the Central Administration and at the same time start the linkage and equipment, to deter intruders and may carry out joint cameras and video.

Alarm system consists of three major components in General: i.e.: signal detectors, signal transmission and control equipment, receive treatment equipment.

Part 1, detectors

Generally used for induction of illegal crossing signal is out of range.

You can take the form of a combination of factors, such as: active-to-shoot infrared detector, laser active probes, outdoor passive infrared detectors, pull line sensor cable, vibration sensor cable, leaking cables, etc, but also use video motion detection equipment to detect perimeter break-ins. These detector technologies vary, but are used for sensing the illegal invasion (over) signal to achieve the purpose of the safety precaution.

2, signal transmission and control equipment

Main function is to complete the probe detected signal acquisition, transmission, processing, display and integration with other systems.

Detector and a host of signal transmission mode is a wireless, wired, bus, etc.

Wireless installation convenient, but the safety factor is not high, susceptible to interference; Wired safety factor is high, but the Setup is too much trouble, wiring, increased costs; Bus is the safety factor is high, the wiring is convenient, the detector is typically received two lines. Select the manner in which the construction based on actual usage.

3. receive and handle equipment

It is the signal transmission and control equipment feature upgrades and added that the general use of professional management integration software

Parts of the system implementation for text, images, sound and light, a more humane management, query, statistics, printing, backup, and signal integrated processing capabilities.

Control Center from control host and keyboard.

Through the keyboard on the front-end device deployment and removed immediately. In a defense, if illegal invasion, when the alarm is triggered, the keyboard and the electronic map display specific alarm point, at the same keyboard and alarm began to sound and light alarm, alarm issued indicating that the person on duty. The host can set the modular linkage output stem node, according to the project actual situation configuration, are used to trigger the searchlight opening and opening the appropriate camera, and video. At the same time as the alert Center alarm status, alarm time records.

Alarm and the whole security system pay most attention to is the front end of the probe, which is a quality security system at source, like the human eye, nose, ears.

As a security system is the most important information collection tool, detector quality direct decided the whole security system reliability. Therefore we will combine the characteristics of the Olympic venues, focus on this area on the front side detector requirements:

1, low false positives, zero false negatives

Olympic Games project, organized belonging to major cannot occur without errors and, therefore, to adopt the performance of high-end products that eliminate false negatives, avoid evasion or malicious to carry dangerous goods from non-entry into the circumstances, the consequences would be unthinkable.

On the other hand, a system to ensure low false positives, since the perimeter of the Olympic Games are open to the possibility of people break cordon, if frequent false positives can cause security forces service rate reduction, serious wasteful; While police officers themselves were on high alert, if you do not disable the beep, on their mental state will cause a heavy burden. Therefore, the system selects with advanced technology, high-quality detectors devices is crucial, to prevent false positives, and the need to eliminate false negatives.

2, deployment, no dead ends

Olympic Games held at the eyes of the world are focused on this point.

Alarm system must be all-round protection, cannot give any advantage instability. Therefore call alarm systems in the deployment scope can form a subtle, no dead ends, a full range of electronic barrier system no blind spots.

3, combined with video surveillance system

Surrounding protection product should be used with video surveillance product linkage constitutes real-time monitoring system of the operating mode.

The need to guard against the entire perimeter, any intrusion may trigger the surrounding protection products output instant alarm signal, the alarm signal to the interactive video surveillance alarm zone real-time image transmission to the control room, and remind the person on duty observation; When the confirm non-false positives, the duty officer can control video surveillance equipment to track suspicious targets at the same time notify the human resources in the wild. Real-time monitoring system of the operating mode of the main features are: the invasion of time, can prompt the person on duty in a timely manner on the on-site observations, disposition; Change video surveillance equipment alone intensive continuous observation of each screen, or in the case occurred later use intensive search video record of passive situation, avoid wasteful.

4. install the product appearance

Olympic stadiums designs pursuing space structure novel, unique, artistic, architectural and structural seamless.

As China's "bird's nest" Olympic stadium design with strong shocking and Visual impact, it is one of the Olympic base image elements that convey the Olympic Games to play and the host country culture an important role. So for its alarm ancillary facilities construction also requires appearance or concealed, the bottom line is you cannot damage the overall appearance.

5. the human body without hurting

The height of the economic and social work enables people to rethink themselves, return to human sustainable development, greater focus on people's health.

Surrounding protection system does not only protect the Olympic venues, will all the risk factors of exclusion, and to protect the environment and health, cannot have any harm on the human body.

3. Olympic venues alarm system products selection

Alarm detector classification, including outdoor perimeter microwave detector, outdoor perimeter active infrared detector, outdoor perimeter passive infrared detector, outdoor perimeter dual technology (active infrared + microwave) alarm detectors, sensing cable, tension sensor cable, pulsed high voltage cable alarm detector and so on.

So many product types, how we choose to accommodate the construction of the Olympic venues?

1. first we start with a simple comparison of various surrounding protection devices of the advantages and disadvantages

(1) laser shot intrusion detector: basic principles and infrared stealth security net approximation, but because the beam targets small, requires precise alignment, construction difficulty during the installation, on the basis of the stability requirements; Wavelength is 500-600nm, infrared wavelength short, in the air transport, the solid particles, fog, rain, etc. larger than infrared attenuation; Higher prices; Laser shot of the night visibility is not strong; On the human eye can form a permanent damage.

(2) traditional active infrared barrier products: appearance not concealed, guard closely enough; Due to the defensive side too short can easily span; Vulnerable to sunlight, leaves and other interference caused by false positives; Rain snow fog causes active infrared detection range shortened and false negatives.

(3) microwave active barrier products: basic principles and approximate infrared stealth security net, beam targets large need precise alignment, construction difficulty at the time of installation, convenient installation and debugging, and high mobility; But slow motion through the alarm; Microwave generated electromagnetic radiation can harm; The system vulnerable to the surrounding buildings and strong electromagnetic interference cause microwave false positives.

(4) outdoor passive infrared detector: unsightly and shared space, not competing for humanity; could not form a closed guard, price high.

So in the face of alarm technology diverse sexual

That this be venues feature to select an appropriate alarm systems.

2. optical fiber sensor alarm system

For a traditional alarm products exist not for sex, Honeywell China system product marketing manager Lu SI Moo suggest using fiber-optic vibration detection equipment.

Fiber-optic vibration detection perimeter surveillance system with optical fiber for induction units, using external vibration on optical characteristics, realization of long-distance, high-range perimeter defense area of exploration. And fiber optic sensor false alarm rate is low, less interference factors.

Optical fiber sensor alarm system, its basic composition have infrared transmitter, optical fibre, the infrared receiver.

Apocryphal transmitter in light-emitting diode IR transmitting pulse modulation, this infrared transmission along the fibre forward, finally arrived at the receiver, and to the photoelectric detection signal sent to alert controllers to form a closed ring system. According to the prevention of different occasions and requirements, fibre can constitute a variety of shapes, the full scope of protection. In a defense of the perimeter of a location, when intruders penetrated, will damage the fiber to vibration or broken, this will trigger the alarm.

Due to fiber very fine, thin as a hair, so you can easily carry out covert installation, system based on the actual application of the different phases of fencing and buried.

When the Olympic venues around with guardrails, fibre concealed in perimeter defense of barbed wire; When the Olympic venues perimeter is a large open area, you can use fibre buried, when intruders crossed for climbing, iron fence or crossing guard region fiber vibration, break through the alarm controller then issued an alert. And fiber optic sensor alarm system from the appearance will not damage the environment or building's overall appearance.

BOSCH Marketing Manager hole Lei added that in the next week alarm system uses a single protection technology, for Olympic venues this complex and important places recoverable using a variety of technology combined to enhance the reliability and stability of the system.

3. infrared curtain wall system

An infrared curtain wall system characteristics are as follows:

(1) preventing more closely.

More classic shoot infrared detectors installed in the same metal bracket, can increase prevention interface, but since it only four basic frequency, so a guard interface can only use a maximum of four classic shoot infrared detectors, practical and effective prevention of height just four detectors prevent height together (up to 1 m), if necessary on the height of 2 meters, in the implementation of protection equivalent to the entire height of 2 meters, only four height approximately 20cm scattered garrisons. Its strict level is clearly not enough. And infrared ray curtain wall products at the height of 2 m to implement prevention, use 10 root interval 20cm infrared beam, when any of the adjacent two infrared beam is completely when alarming interdictions, equivalent to the height of the entire 2 m 10 consecutive zone, its prevention tightness is high enough.

(2) prevent the replacement function.

Classic shoot infrared detectors using a single frequency without secondary modulation mode, when subjected to the same product interference, for example in the intruder handheld products the transmitter on the receiving end of the installation, its corresponding exposure of the transmitter will be an intruder handheld transmitter substitution of similar products. And infrared curtain wall using second modulation of synchronous communications, when affected by interference with the product, such as intruders with similar products in the transmitter on the receiving end of the installation, its high exposure prevention level products can instantly generate an alert.

(3) the appearance, prevention of more subtle.

Classic shoot-infrared detector of modeling is clearly a security products, prevention of functional areas are also at a glance, the intruders easily give way; Infrared curtain wall itself has the function of the lamp, the lamp column shape makes the person feel out the security products, from the appearance or see its prevention feature area, users feel natural, beautiful, mysterious intruder feeling, nor easy to avoid. If the fixed equipment selection, you can use its lamps Lighting feature that saves design lighting costs; While according to the overall architectural style matching different lampholders, achieve the best decoration effect.

(4) installation more humane.

Install the main requirement is that the surface is smooth, firm, can ensure the base installation of the support frame. For installation of ground height differences, you can pass along the internal support mechanisms of regulation of slot adjust detection point height, thus achieving high, low differential compensation; At the same time each probe rod in installation height fixed later, also has a 120 ° horizontal swivel adjust capacity, installation construction, you can easily implement and adjacent infrared alignment between the curtain wall.

For different Zhou territories conditions and different venues architectural style, you can choose a different style, different height of infrared curtain wall products.

For example: some venues have solid walls, you can choose the light pole height is the second beam 60cm doorpost lamp type infrared curtain wall; Some venues with bars of fence, some venues open flower bed separated form the perimeter, you can choose the light pole height 220cm 10 beam garden lights-infrared curtain wall; On perimeter of internal targets of some of the key, you can also install directly on the target around some four-beam or six beams lawn lamp type infrared curtain wall, with alarm controller or video surveillance equipment, realize the importance of the perimeter of internal targets with strict precautions.

4. linkage monitoring system

In the Olympic stadiums around 50 m and 100 m will delineate the VM warning level, set the alarm system, thereby preventing human intrusion.

But the Olympic venues, the perimeter is open regional human being is inevitable, because preventive perimeter length, total environment is complex and should be used with video surveillance product linkage constitutes real-time monitoring system, increased video analytics. When someone enters a picket line, the system emits a beep, the important point of the image to watch to see, easy to watch officer on monitoring points surrounding environment at any time to learn and master. Judging by the video analysis, as no malicious into results, then cancel alarm, security personnelNo exhibition.

Depending on the type of camera, you can have two usage scenarios:

1. set the fast ball camera

Use fast ball camera and infrared ray curtain wall joint prevention model, infrared curtain wall by 30 m/1 root configuration, fast ball camera distance according to their actual Imaging; index configuration To IR curtain wall lights as a fast ball camera night supplemental lighting, infrared curtain wall trigger alarm signal, the faster the ball camera immediately link to the infrared curtain wall protection zones, and starts the video recording.

Control room screen displayed the scenes images, also issued audio prompt attendance for observation and treatment. This scenario video materials minimize the amount of data.

2. fixed gun camera

If you use fixed gun camera and infrared ray curtain wall joint prevention model, infrared curtain wall can be 50 m/1 root configuration, fixed gun camera distance according to their actual Imaging; index configuration Video can infrared curtain wall trigger alarm signal, the programmes of the same video materials minimize the amount of data.

You can also turn on video, peacetime has been recorded information retrieval according to the sort of trigger alarm.

Also used with infrared illumination of fixed gun camera, the camera is a good idea to install in the week, it points to the sector and the infrared beam vertical is preferred; If the camera is installed in the perimeter edge, it points to the parallel with the infrared beam, should ensure that it points to the infrared curtain wall of the transmitter.