Analysis of the principle and system composition of fire alarm system
Fire alarm system principle <br> <br> fire alarm system usually consists of two somewhat: the exploration fire and fire alarm. The fire explorer is installed on the site to monitor whether there is a fire on the scene; the fire alarm is installed in the fire control center and manages all the fire explorers. When a fire was detected, an audible and visual alarm signal was announced to tell the on-duty personnel that some of the fire alarms could also be activated by linkage devices. Some fire explorers have sound and light alarm devices that can be used outside the fire alarm system and are usually used in homes.
The composition and principle <br> <br> fire Tixi fire alarm system by function can be divided into active fire alarm system and the linkage system. The former’s function is to announce sound and light alarm signals and indicate the location of a fire to be extinguished after discovering a fire. The latter’s function is to actively launch various devices after the active fire alarm system detects the fire to prevent fire from extending. Until fighting the disaster. From the different functions of the two, it can be seen that they are inseparable. In practice, many active fire alarm systems have the function of an active linkage system.
The active fire alarm system is usually composed of two major components: fire explorer and fire alarm. The fire explorer is installed on the site to monitor whether there is a fire on the scene; the fire alarm is installed in the fire control center and manages all the fire explorers. When a fire was detected, an audible and visual alarm signal was announced to tell the on-duty personnel that some of the fire alarms could also be activated by linkage devices. Some fire explorers have sound and light alarm devices that can be used outside the fire alarm system and are usually used in homes.
The principle of a fire exploration fire attack is to detect changes in a physical parameter before and after a fire attack. For example: Detect temperature. When the temperature rises, it can be determined that there is a fire attack. Usually through the detection of three physical parameter changes, to determine whether there is a fire attack, the three physical parameters are: smoke concentration, temperature and light. The fire explorer can thus be divided into smoke detectors, temperature probes and flame surveyors. In practice, there have been two most. The smoke detector detects changes in the concentration of smoke on the site to determine whether there is a fire attack; the temperature-sensing explorer detects changes in the on-site temperature to determine whether there is a fire attack; the flame explorer detects changes in the infrared or ultraviolet spectral intensity, and discriminates Can you have a fire attack? Smoke detectors have ion smoke detectors, photo-electric smoke detectors, and infrared beam explorers. Temperature-sensing explorers include fixed-temperature explorers, differential-temperature probers, differential-temperature probers, and fixed-temperature cable surveyors. The flame explorer has an infrared flame surveyor, a UV flame surveyor, and a composite flame surveyor. Today, some fire explorers are composite explorers. Not only can they test one physical parameter, but they can test multiple parameters to determine whether there is a fire attack.
The fire alarm system can distinguish the N+I line system, the 4-wire system, the 3-wire system and the 2-bus system according to the connection between the fire detector and the fire alarm. Because of the construction constraints, the first several fire alarm systems have been screened. The current production of fire alarm systems is somewhat a two-bus system. According to fire alarm system to distinguish fire, fire alarm system can be divided into switch fire alarm system and analog fire alarm system. The fire detector of the switch fire alarm system is a switch quantity explorer. The alarm principle is that there is a match in the fire explorer. When the smoke concentration, temperature or other physical parameters of the fire explorer reach a certain threshold, the fire explorer It becomes a fire condition. When the fire alarm patrols the surveyor, the surveyor reports the fire condition to the fire alarm controller. The analog fire alarm system uses an analog fire explorer. The analog fire explorer continuously reports the collected field data to the fire alarm controller. The fire alarm controller passes a certain algorithm to determine whether it is a fire. If it is determined that there is a fire attack, the fire command was announced and the light on the fire explorer was lighted.
Fire alarm algorithm is very important, good algorithm can greatly reduce the false alarm of the fire alarm system, and some algorithms, such as the fire alarm controller set an alarm threshold, the practice and the switch fire alarm system is not much difference, just The alarm threshold on the fire explorer was changed to the fire alarm controller. The analog fire alarm system can change the exploration zero point of the system according to the changes of the environment and select the best exploration algorithm to reduce the false alarm of the fire alarm system. Some fire alarm controllers use intelligent fire explorers that can modify their own exploration zeros based on changes in the environment, compensate themselves, and use appropriate algorithms to determine whether there is a fire attack. This type of fire alarm controller can also reduce false alarms, but because of the cost and volume constraints, the fire explorer cannot be too cluttered and its algorithm cannot be as cluttered as analog fire alarm controllers. In a fire alarm system, the man-machine interface of the fire alarm manipulator is very important. If the man-machine interface is well described, the operator can conveniently supervise the operating condition of the fire alarm system.
The status of the fire alarm controller shows that the indicator light appears, the digital tube appears, and the liquid crystal appears. Because the LCD consumes less power and can display Chinese characters and graphics, many fire alarm controllers use liquid crystal displays to visualize various conditions of fire information and fire alarm controllers. Some fire alarm controllers appear and operate as Chinese prompts, and they are very convenient for learning and use. Because the address of the explorer is usually binary coded, it will appear as a number when there is a fire in the place where the fire explorer is located. Then the number of the fire site is searched by this number, which is more troublesome. Nowadays, some fire alarm controllers have been able to use Chinese characters as a direct indication of the location of a fire after a fire. This makes it simple to determine the site of a fire (and adopt a useful approach in a timely manner).
The active fire linkage system is used to control various linkage devices, and has a multi-line linkage operation system and a bus system linkage operation system. In the multi-line linkage control system, from the linkage manipulator to each linkage device, two to four lines must be connected, which is generally suitable for the construction of a few linkage devices. With regard to the construction of more linkage equipment, if the multi-line linkage control system is used, the construction of the project is more difficult than that of the linkage system. In the linkage control system of the bus system, the active fire linkage system consists of a linkage system and a control module. There are two buses or four buses between the linkage manipulator and the control module. Each group of buses can connect multiple control modules. When a linkage device is required, the linkage manipulator announces an instruction to control the module, and the control module initiates linkage again. equipment. Usually a linkage device is a move, but some devices such as rolling shutters are two measures. Some modules output one initiative and some output multiple initiatives. When delineating, we must conclude that the linkage equipment requires several modules to operate.
The composition and principle <br> <br> fire Tixi fire alarm system by function can be divided into active fire alarm system and the linkage system. The former’s function is to announce sound and light alarm signals and indicate the location of a fire to be extinguished after discovering a fire. The latter’s function is to actively launch various devices after the active fire alarm system detects the fire to prevent fire from extending. Until fighting the disaster. From the different functions of the two, it can be seen that they are inseparable. In practice, many active fire alarm systems have the function of an active linkage system.
The active fire alarm system is usually composed of two major components: fire explorer and fire alarm. The fire explorer is installed on the site to monitor whether there is a fire on the scene; the fire alarm is installed in the fire control center and manages all the fire explorers. When a fire was detected, an audible and visual alarm signal was announced to tell the on-duty personnel that some of the fire alarms could also be activated by linkage devices. Some fire explorers have sound and light alarm devices that can be used outside the fire alarm system and are usually used in homes.
The principle of a fire exploration fire attack is to detect changes in a physical parameter before and after a fire attack. For example: Detect temperature. When the temperature rises, it can be determined that there is a fire attack. Usually through the detection of three physical parameter changes, to determine whether there is a fire attack, the three physical parameters are: smoke concentration, temperature and light. The fire explorer can thus be divided into smoke detectors, temperature probes and flame surveyors. In practice, there have been two most. The smoke detector detects changes in the concentration of smoke on the site to determine whether there is a fire attack; the temperature-sensing explorer detects changes in the on-site temperature to determine whether there is a fire attack; the flame explorer detects changes in the infrared or ultraviolet spectral intensity, and discriminates Can you have a fire attack? Smoke detectors have ion smoke detectors, photo-electric smoke detectors, and infrared beam explorers. Temperature-sensing explorers include fixed-temperature explorers, differential-temperature probers, differential-temperature probers, and fixed-temperature cable surveyors. The flame explorer has an infrared flame surveyor, a UV flame surveyor, and a composite flame surveyor. Today, some fire explorers are composite explorers. Not only can they test one physical parameter, but they can test multiple parameters to determine whether there is a fire attack.
The fire alarm system can distinguish the N+I line system, the 4-wire system, the 3-wire system and the 2-bus system according to the connection between the fire detector and the fire alarm. Because of the construction constraints, the first several fire alarm systems have been screened. The current production of fire alarm systems is somewhat a two-bus system. According to fire alarm system to distinguish fire, fire alarm system can be divided into switch fire alarm system and analog fire alarm system. The fire detector of the switch fire alarm system is a switch quantity explorer. The alarm principle is that there is a match in the fire explorer. When the smoke concentration, temperature or other physical parameters of the fire explorer reach a certain threshold, the fire explorer It becomes a fire condition. When the fire alarm patrols the surveyor, the surveyor reports the fire condition to the fire alarm controller. The analog fire alarm system uses an analog fire explorer. The analog fire explorer continuously reports the collected field data to the fire alarm controller. The fire alarm controller passes a certain algorithm to determine whether it is a fire. If it is determined that there is a fire attack, the fire command was announced and the light on the fire explorer was lighted.
Fire alarm algorithm is very important, good algorithm can greatly reduce the false alarm of the fire alarm system, and some algorithms, such as the fire alarm controller set an alarm threshold, the practice and the switch fire alarm system is not much difference, just The alarm threshold on the fire explorer was changed to the fire alarm controller. The analog fire alarm system can change the exploration zero point of the system according to the changes of the environment and select the best exploration algorithm to reduce the false alarm of the fire alarm system. Some fire alarm controllers use intelligent fire explorers that can modify their own exploration zeros based on changes in the environment, compensate themselves, and use appropriate algorithms to determine whether there is a fire attack. This type of fire alarm controller can also reduce false alarms, but because of the cost and volume constraints, the fire explorer cannot be too cluttered and its algorithm cannot be as cluttered as analog fire alarm controllers. In a fire alarm system, the man-machine interface of the fire alarm manipulator is very important. If the man-machine interface is well described, the operator can conveniently supervise the operating condition of the fire alarm system.
The status of the fire alarm controller shows that the indicator light appears, the digital tube appears, and the liquid crystal appears. Because the LCD consumes less power and can display Chinese characters and graphics, many fire alarm controllers use liquid crystal displays to visualize various conditions of fire information and fire alarm controllers. Some fire alarm controllers appear and operate as Chinese prompts, and they are very convenient for learning and use. Because the address of the explorer is usually binary coded, it will appear as a number when there is a fire in the place where the fire explorer is located. Then the number of the fire site is searched by this number, which is more troublesome. Nowadays, some fire alarm controllers have been able to use Chinese characters as a direct indication of the location of a fire after a fire. This makes it simple to determine the site of a fire (and adopt a useful approach in a timely manner).
The active fire linkage system is used to control various linkage devices, and has a multi-line linkage operation system and a bus system linkage operation system. In the multi-line linkage control system, from the linkage manipulator to each linkage device, two to four lines must be connected, which is generally suitable for the construction of a few linkage devices. With regard to the construction of more linkage equipment, if the multi-line linkage control system is used, the construction of the project is more difficult than that of the linkage system. In the linkage control system of the bus system, the active fire linkage system consists of a linkage system and a control module. There are two buses or four buses between the linkage manipulator and the control module. Each group of buses can connect multiple control modules. When a linkage device is required, the linkage manipulator announces an instruction to control the module, and the control module initiates linkage again. equipment. Usually a linkage device is a move, but some devices such as rolling shutters are two measures. Some modules output one initiative and some output multiple initiatives. When delineating, we must conclude that the linkage equipment requires several modules to operate.
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Features:
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Application:
It can be widely used in areas of garbage burying, waste disposal, tail minerals storage and underground construction projects.
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