Networking of fire alarm system is imperative

With the development of urban construction, the hidden danger of fire insurance is increasing, and the probability of occurrence of heavy fires is on the rise. The automatic fire alarm network monitoring technology developed on the basis of modern communication and network transmission technology can ensure the normal operation of fire detection and alarm systems and fire safety facilities and play its due role, and transmit equipment operation data and alarms of fire detection and alarm systems. Information, to shorten the alarm time, accurately and quickly put out fires, and improve the overall level of technical disaster prevention and mitigation. Prior to the time of fire alarms, networking applications are imperative.

The fire detection and alarm time must be advanced in advance with special important units and places such as computer centers, power dispatch and command centers, post and telecommunications hubs, graphic and file information centers, semiconductor production workshops, nuclear power stations, etc., which play a role in the national economy and social production and life. Important role. Various electrical and electronic equipments and instruments in these places are highly concentrated and in long-term operation. There are many hidden fire hazards caused by overload, overheating, and short circuit of electrical equipment. Once a fire occurs, it will cause major economic losses to the country and give society Bring a major impact; in the event of a fire or explosion in a flammable or explosive location, it will be difficult to save in time. Given the importance and particularity of these places, the common types of temperature and smoke detection and alarm systems are no longer sufficient, and super-early fire detection and warning techniques must be used.

Some developed countries attach great importance to the research and product development of ultra-early fire detection and alarm technology. As early as the 1980s, Japan, the United States, the United Kingdom, Switzerland, Germany, Australia, and other countries have started technical research and product development in this field. At present, research and development of laser-type high-sensitivity smoke detectors and aspirators High-sensitivity fire detection alarm system and gas fire detection alarm system and other ultra-early fire detection and alarm products. These systems use the principle of laser particle counting and laser scattering to monitor the protected space, and determine whether or not a fire can occur with the increase in the particle volume per unit volume. The potential fire risk can be identified within hours or days before the fire occurs. To achieve ultra-early fire alarms. Compared with the common smoke detection and alarm system, the detection sensitivity of this system is improved by two orders of magnitude or more. However, at present, this technology is limited to the detection of smoke particles, and is still limited in application environment by application.

The use of gas and gas components in the detection of fire products in the early stages of the fire or elements that constitute a fire detection technology is also another promising aspect of ultra-early fire detection. Experts believe that while researching the ultra-early-fire detection technology, fire detection alarms are divided into two phases: fire detection and fire prediction. New processing methods and concepts are explored. Using new concept guidance techniques will promote super early Development of fire detection technology.

Development Status of Fire Detection Technology At the end of the 20th century, fire detection technology and other technologies began to cross and combine widely. Intelligent detection, intelligent monitoring, anti-jamming algorithm, signal processing technology, artificial intelligence technology and automatic control technology in fire detection technology Gradually applied, fire detection technology has entered a new period of development.

One of the powerful means to eliminate false alarms for fire detection is to use composite fire detection technology, which overcomes the false alarms that may result from measuring a single parameter by using multiple fire parameters from one sensor. It is currently considered that the measurement of three to four fire parameters constitutes the best composite detection performance. In China, two-parameter detection technology consisting of photo-thermal smoke detection is used to improve the fire detection effect. Beida Jade Bird Universal Fire Protection Equipment Co., Ltd. and Gulf Security Technology Co., Ltd. both have relatively mature composite detectors.

◇ High-sensitivity aspirated fire detection technology High-sensitivity aspirated fire detection technology uses laser scanning of inhaled air samples to determine the fire. This technology can make the fire detection sensitivity 1000 times higher than the ordinary smoke fire detector, and the alarm time is 30 to 120 minutes earlier. In addition, this detection technology is insensitive to electromagnetic interference, strong light interference, and pulse interference, effectively preventing false alarms. This detector is particularly suitable for installation in an ultra-clean environment for early fire detection. At the end of the last century, China introduced aspiration-type fire detection equipment produced by Australia's Vestas, which was expensive at the time. Our country immediately began to develop and produce. Today, the company’s Li An Security Technology Co., Ltd., China National Nuclear Corporation Xi'an Nuclear Instrument Factory and other units have developed similar products with advanced performance and low price. Xi'an Solar Electronics Co., Ltd. developed a special suction for tobacco warehouses. Fire detection equipment.

â—‡ Fiber-optic temperature measurement technology Currently widely used photodetectors, flame detectors and other detection equipment for the detection of fire in storage tank areas, tunnels, cable galleries (wells), large substations and other flammable and explosive electromagnetic fields and other places Not ideal. Fiber grating fire alarm system uses fiber grating as a temperature detector to detect abnormal temperature changes and promptly alarm. The current optical fiber temperature measurement technology uses the longest distance of the optical fiber up to 4,000 meters. The actual temperature measurement range is from -300C to 900C, and it can accurately detect undulating temperature changes and accurately locate. This kind of detection technology has good stability and is completely free of electromagnetic, humidity and other environmental issues. It is particularly suitable for places where general fire detection technologies such as tunnels, transportation pipes, and nuclear power stations are difficult to perform. The products of Wuhan Polytechnic Optical Co., Ltd., Shanghai Bohui Communication Technology Co., Ltd., Beijing Kekang Technology Co., Ltd., Japan J-POWER Co., Ltd., etc. have been applied in China and are operating well.

â—‡ Intelligent fire escape indication system The intelligent fire escape indication system, also known as the centralized control type fire emergency lighting indication system, monitors various types of underlying working components through centralized controllers (such as fire emergency luminaires, fire emergency power supplies, power distributors, modules and related accessories Etc.) According to the fire situation, in the event of a fire, the system can adjust the direction of the on-site emergency evacuation instructions, control the corresponding fire emergency lighting to work, and help the trapped personnel to evacuate along the correct evacuation direction and path. It solves the problem that the traditional fire emergency lighting cannot dynamically adjust the direction of evacuation and the opening of corresponding lighting fixtures according to the specific conditions of the fire field, and ensures that the fire emergency lighting and evacuation instruction system can correctly guide the evacuation of the personnel and provide illumination on the corresponding path. However, the price of the system is obviously higher than the traditional fire emergency lighting and evacuation indication system, and the application is subject to certain limitations.

The remote monitoring system of Yucheng City's fire-fighting system is based on modern network monitoring technology. It quickly and accurately transmits the signal of each unit's automatic fire alarm system (usually set to fire or fault signal) to the city within the shortest time. Fire Remote Monitoring Center. The remote monitoring system is an important means to improve the rapid response capability of the fire brigade and increase the success rate of extinguishing the initial fire. It is also a powerful measure to improve the self-management of the fire safety of the social units and the prevention and control of fire in the whole society. For various reasons, the system has not been widely promoted.

Networking of fire detection and alarm systems to networked fire detection and alarm systems Networking refers to the application of computer data communication technology to fire detection and alarm systems. Exchanges between controllers or between detectors, between systems and between systems are exchanged through network protocols. Data information, to achieve automatic fire alarm system level function set, remote data call management, automatic alarm, network monitoring and network communications services and other functions. Networking is the direction of the development of automatic fire alarm systems. With it, it can solve the problems of large-scale, super-large fire control projects with many control points and automatic alarms.

In order to effectively manage the fire detection and alarm system and give full play to its role, it is very important to implement network monitoring and management of the fire detection and alarm system. Such products and technologies have matured and are applied in practical projects with good results. However, at present, the communication protocols of fire detection and alarm systems of various manufacturers are varied and independent, and there is no uniform format, which is not conducive to the development of fire detection and alarm systems. Therefore, with the development of the network of fire detection and alarm systems, network protocols will become one of the hot spots of concern.