Automatic fire alarm intelligent linkage fire extinguishing system

Abstract

The invention belongs to the technical field of automatic fire alarm system equipment manufacturing, and particularly relates to an automatic fire alarm intelligent linkage fire extinguishing system. A fire automatic alarm intelligent linkage fire extinguishing system comprises: at least one monitoring execution module having an A / D conversion chip and used for transmitting a signal of a detector to a single-chip microcomputer, the single-chip microcomputer being capable of transmitting signals to an on-site ringing module and a fire extinguishing linkage module, and being capable of performing signal mutual transmission with an RS485 interface chip; wherein the RS485 interface chip and the RS485 interface chip a carry out signal mutual transmission, the RS485 interface chip a and the main single-chip microcomputer carry out signal mutual transmission, and the main single-chip microcomputer can control the digital display module and the sound-light alarm module through the driving circuit. The system has the advantages of sensitive alarm, automatic control, automatic alarm, high practical value, low cost and maintenance cost and the like.

Description

Technical Field

[0001] The invention belongs to the technical field of automatic fire alarm system equipment manufacturing, and in particular relates to an automatic fire alarm intelligent linkage fire extinguishing system. Background Art

[0002] With the rapid development of economy and urban construction, the city scale is expanding, the population is increasing, and the number of high-rise buildings, underground projects, market trading markets, places where people gather, as well as chemical enterprises, liquefied petroleum gas filling plants, gas stations, etc. in cities is increasing day by day, and the potential fire hazards are also greatly increasing. As a result, the probability of various fire factors, especially major malignant fires, other emergencies and special injuries is also increasing year by year.

[0003] At present, the building fire protection system with automatic fire alarm technology as the core is an important guarantee for preventing and curbing major building fires. In recent years, with the rapid development of economic construction and science and technology such as semiconductors, microelectronics, optoelectronics, computers and information, the automatic fire alarm technology is market-oriented and guided by the application of high-tech. It has made great progress in carrying out basic theory and application technology research, technical transformation of old products, development of new products, expanding the scope of application and improving application benefits. The intelligent automatic fire alarm system adopts advanced computer control technology. The alarm form of the detector adopts analog quantity, and its sensitivity can be set and adjusted by software according to the occasion and time of use. Different sensitivities can be set during the day, night and rest days. This function can improve the stability and reliability of the system and reduce false alarms. Intelligence is the main sign of product technology upgrades of domestic and foreign manufacturers. In order to adapt to the newly promulgated new fire linkage equipment standard GB15806-97, from multi-line system to full bus system, from multi-line hardware combination to full bus software programming, from multi-variety interfaces to standardized interfaces, all fire alarm controllers are developing towards "fire alarm controller (linkage type)". Looking at the characteristics of fire alarm products at home and abroad, it can be clearly concluded that intelligence and the use of retrieval and query technology to make alarm controllers move towards linkage are the inevitable trends in the development of fire alarm control technology. Summary of the invention

[0004] In order to solve the above problems, the present invention provides the following solutions:

[0005] Automatic fire alarm intelligent linkage fire extinguishing system, including

[0006] At least one monitoring execution module having

[0007] A / D conversion chip, used to transmit the detector signal to the microcontroller,

[0008] The single chip microcomputer can transmit signals to the on-site bell module and the fire extinguishing linkage module respectively, and can also transmit signals to and from the RS485 interface chip;

[0009] in,

[0010] The RS485 interface chip and the RS485 interface chip a transmit signals to each other.

[0011] The RS485 interface chip a transmits signals to and from the main single-chip microcomputer, and the main single-chip microcomputer can control the digital display module and the sound and light alarm module through the driving circuit.

[0012] In some embodiments, the detector transmits a signal to an A / D conversion chip through a signal amplification and filtering circuit.

[0013] In some embodiments, the detector includes a smoke detector or a heat detector.

[0014] In some embodiments, the main single chip microcomputer is also connected to the automatic sprinkler control module and controls the automatic sprinkler control module.

[0015] In some embodiments, the automatic sprinkler control module has

[0016] Solid-state relay connected to the main microcontroller,

[0017] The solid-state relay is connected in series with the solenoid valve and the 220V AC power supply, and the two terminals of the first resistor are respectively connected between the solid-state relay and the solenoid valve, and between the solid-state relay and the 220V AC power supply.

[0018] The solenoid valve is used to control the spray water valve.

[0019] In some embodiments, the solid-state relay is also connected to a 5V DC power supply.

[0020] In some embodiments, a second resistor is provided between the solid-state relay and the 5V DC power supply.

[0021] The present invention has the advantages of sensitive alarm, automatic control, automatic alarm, high practical value, low cost and maintenance cost, etc. When a fire occurs, the fire alarm controller sends out an alarm message to notify personnel to transfer safely. The fire linkage controller performs linkage logic operation according to the fire information, outputs linkage signals, and intelligently starts fire-fighting special telephones, fire emergency lighting, fire sprinkler pumps, fireproof roller shutters, smoke exhaust fans and other related fire-fighting equipment, quickly and effectively implements fire prevention and fire extinguishing, has a high degree of automation, effectively improves the fire alarm response speed, and prevents the occurrence of serious fires due to excessive risks caused by negligence of on-duty personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is an overall block diagram of the present invention;

[0023] Figure 2This is a schematic diagram of automatic sprinkler pump control.

[0024] In the figure:

[0025] 1 smoke detector, 2 temperature detector, 3 signal amplification and filtering circuit, 4 A / D conversion chip, 5 single-chip microcomputer, 5a main single-chip microcomputer, 6 on-site bell, 7 fire extinguishing linkage device, 8 RS485 interface chip, 8a RS485 interface chip a, 9 driving circuit, 10 digital display, 11 sound and light alarm, 12 solid-state relay SSR, 13 resistor, 14 5V DC power supply, 15 solenoid valve, 16 220V AC power supply. DETAILED DESCRIPTION

[0026] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0027] Automatic fire alarm intelligent linkage fire extinguishing system, including

[0028] At least one monitoring execution module M1, having:

[0029] A / D conversion chip 4 is used to transmit the signal of the detector to the single chip microcomputer 5,

[0030] The single chip microcomputer 5 can transmit signals to the on-site bell module 6 and the fire extinguishing linkage module 7 respectively, and can exchange signals with the RS485 interface chip 8;

[0031] in,

[0032] The RS485 interface chip 8 and the RS485 interface chip a8a transmit signals to each other.

[0033] The RS485 interface chip a8a and the main single chip microcomputer 5a transmit signals to each other, and the main single chip microcomputer 5a can control the digital display module 10 and the sound and light alarm module 11 through the driving circuit 9.

[0034] In some specific application scenarios, the detector transmits the signal to the A / D conversion chip 4 through the signal amplification and filtering circuit 3 .

[0035] In some specific application scenarios, the detector includes a smoke detector 1 and a temperature detector 2 .

[0036] In some specific application scenarios, the main single-chip microcomputer 5a is also connected to the automatic sprinkler control module M2 and controls the automatic sprinkler control module M2.

[0037] In some specific application scenarios, the automatic sprinkler control module M2 has:

[0038] The solid state relay 12 connected to the main single chip microcomputer 5a,

[0039] The solid-state relay 12 is connected in series with the solenoid valve 15 and the 220V AC power supply 16. The two terminals of the first resistor 13a are respectively connected between the solid-state relay 12 and the solenoid valve 15 and between the solid-state relay 12 and the 220V AC power supply 16.

[0040] The solenoid valve 15 is used to control the spray water valve.

[0041] As for the solid-state relay 12 , the solid-state relay 12 is also connected to a 5V DC power supply 14 .

[0042] For the solid-state relay 12 , a second resistor 13 b is provided between the solid-state relay 12 and the 5V DC power supply 14 .

[0043] The working principle of this system is that when a fire occurs, the temperature detector or smoke detector detects a fire signal, changes from the alert state to the alarm state, outputs a high level, passes through the signal amplification and filtering circuit, outputs a high level of about 5V voltage, enters the single-chip microcomputer through the A / D conversion chip, and transmits the compiled program to the single-chip microcomputer chip. The single-chip microcomputer controls the scene to ring the alarm and intelligently starts the fire extinguishing linkage device. Through the RS485 protocol, the "many-to-one" method is used to realize communication between single-chip microcomputers. The single-chip microcomputer in the monitoring room receives the fire information and sends out an audible and visual alarm through the drive circuit. The LED dynamically displays the location of the fire and records the time of the fire. The on-duty personnel immediately determine the alarm information and evacuate the crowd in time, quickly extinguish the fire, and minimize personal injury and property loss.

[0044] The present invention adopts AT89C51 of ATMEL series as actual single-chip microcomputer control. ATMEL single-chip microcomputer has high performance in I / O function, type, quantity, system expansion and CPU processing. ATMEL series single-chip microcomputer has good reliability, easy expansion and strong control function. It can be said to be the eight-bit single-chip microcomputer with the best cost performance, which is particularly suitable for my country's national conditions. Therefore, the present invention adopts ATMEL series single-chip microcomputer as the control chip of the alarm controller.

[0045] The present invention uses a temperature detector and a smoke detector as trigger devices to automatically generate a fire alarm signal. When the detector is in an alert state, the I / O line is at a low level, and when it is in an alarm state, it is at a high level. The temperature detector uses a PT100 temperature sensor. The metal platinum resistor has a large temperature coefficient, sensitive induction, high resistivity, and small component size. The resistance value changes with temperature in a basically linear relationship. Within the temperature measurement range, the physical and chemical properties are stable and the measurement accuracy is high. The PT100 temperature sensor is a platinum wire thermal resistor sensor with good stability and linearity, and can work in the range of -200°C to 650°C. The smoke detector uses a TGS202 ion smoke sensor. This type of smoke sensor has high sensitivity and good stability and is suitable for detection in fire gases. When TGS202 detects CO2 or CO, the internal resistance of the sensor becomes smaller, and the output voltage rises rapidly. The appropriate resistance value is selected so that when the gas concentration reaches a certain level (such as the CO concentration reaches 0.06%), the output end obtains a voltage suitable for the single-chip microcomputer. In order to match the input level of the single-chip microcomputer, the I / O line of the probe is input after passing through the signal amplification circuit, that is, the resistor voltage division. When the alarm is triggered, a voltage value of about 5V can be obtained. The detection input signal of the sensor can enter the AT89C51 single-chip microcomputer through the A / D conversion chip to perform cyclic sampling and detection of the signal. The A / D conversion chip uses the TLC1541 chip, which is a CMOS A / D converter constructed based on a 10-bit switched capacitor successive approximation A / D converter. They are designed to be able to serially interface with a microprocessor or peripheral device through three-state output and analog input, and can work independently. TLC1541 only uses the input / output clock (I / O CLOCK) and chip selection input for data control. It has a general control logic and an on-chip sampling-holding circuit that works automatically or under the control of the MCU, as well as a differential high-impedance reference voltage input terminal, a high-speed converter that is easy to implement ratio conversion, calibration, and a circuit that is isolated from logic and power supply noise.

[0046] The fire alarm controller is used to receive, display and transmit fire alarm signals, and can send control signals and have other auxiliary functions. The fire alarm controller is responsible for providing a stable working power supply for the fire detector, monitoring the working status of the detector and the system itself, receiving, converting and processing the alarm signal output by the fire detector, and performing sound and light alarm through the solenoid valve drive circuit, indicating the specific location and time of the alarm, and performing corresponding auxiliary control and many other tasks. It is the core component of the present invention.

[0047] When a fire occurs, the fire alarm controller sends out an alarm message, and the fire linkage controller performs linkage logic operations according to the fire information and the pre-compiled linkage logic relationship program, outputs linkage signals, starts relevant fire-fighting equipment, and implements fire prevention and fire extinguishing. The fire extinguishing linkage device mainly includes the control device of the automatic fire extinguishing system, the control device of the indoor fire hydrant system, the control device of the automatic sprinkler water pump, the control device of the smoke exhaust system and the air conditioning and ventilation system, the normally open fire door, the control device of the fireproof roller shutter, the elevator return control device, and some or all of the control devices such as the fire emergency broadcast, the fire alarm device, the fire communication equipment, the fire emergency lighting and the evacuation indication sign control device. In the present invention, only the control device of the automatic sprinkler water pump and the control device of the fireproof roller shutter are briefly described.

[0048] Automatic sprinkler pump control device

[0049] When the AT89C51 microcontroller outputs a high-level signal, it passes through the NOR gate to become a low-level signal, and the solid-state relay SSR is turned on, turning on the solenoid valve, thereby achieving an automatic spraying effect. On the contrary, when the output is a low-level signal, it passes through the NOR gate to become a high-level signal, the solid-state relay SSR is turned off, the solenoid valve is closed, and the spray pump does not work.

[0050] It will be clear to those skilled in the art that various modifications to the above embodiments may be made without departing from the overall spirit and concept of the present invention. All of these modifications fall within the scope of protection of the present invention. The protection scheme of the present invention shall be subject to the claims attached to the present invention.

Claims

1. Automatic fire alarm intelligent linkage fire extinguishing system, characterized by: include At least one monitoring execution module (M1) having The A / D conversion chip (4) is used to transmit the signal of the detector to the single chip computer (5). The single chip microcomputer (5) can transmit signals to the on-site bell module (6) and the fire extinguishing linkage module (7) respectively, and can transmit signals to and from the RS485 interface chip (8); in, The RS485 interface chip (8) and the RS485 interface chip a (8a) perform signal transmission. The RS485 interface chip a (8a) and the main single-chip microcomputer (5a) perform signal transmission, and the main single-chip microcomputer (5a) can control the digital display module (10) and the sound and light alarm module (11) through the driving circuit (9).

2. The fire automatic alarm intelligent linkage fire extinguishing system according to claim 1 is characterized in that: The detector transmits a signal to an A / D conversion chip (4) via a signal amplification and filtering circuit (3).

3. The fire automatic alarm intelligent linkage fire extinguishing system according to claim 1 is characterized in that: The detector comprises a smoke detector (1) and a temperature detector (2).

4. The fire automatic alarm intelligent linkage fire extinguishing system according to claim 1 is characterized in that: The main single chip computer (5a) is also connected to the automatic spray control module (M2) and controls the automatic spray control module (M2).

5. The fire automatic alarm intelligent linkage fire extinguishing system according to claim 4 is characterized in that: The automatic spray control module (M2) has A solid state relay (12) connected to the main single chip microcomputer (5a), The solid-state relay (12) is connected in series with the solenoid valve (15) and the 220V AC power supply (16); two terminals of the first resistor (13a) are respectively connected between the solid-state relay (12) and the solenoid valve (15), and between the solid-state relay (12) and the 220V AC power supply (16). The solenoid valve (15) is used to control the spray water valve.

6. The fire automatic alarm intelligent linkage fire extinguishing system according to claim 4 is characterized in that: The solid-state relay (12) is also connected to a 5V DC power supply (14).

7. The fire automatic alarm intelligent linkage fire extinguishing system according to claim 6 is characterized in that: A second resistor (13b) is provided between the solid-state relay (12) and the 5V DC power supply (14).

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