CN204576734U

CN204576734U - Poisoning and the fire alarm security system of family gas

Info

Publication number: CN204576734U
Application number: CN201520194096.XU
Authority: CN
Inventors: 王路露; 陈英; 肖利军
Original assignee: Changsha University
Current assignee: Changsha University
Priority date: 2015-04-02
Filing date: 2015-04-02
Publication date: 2015-08-19
Anticipated expiration: 2025-04-02

Abstract

This is novel relates to the poisoning and fire alarm security system of a kind of family gas, and comprise a main module circuit and multiple monitoring modular circuit, wherein main module circuit divides two-layer welding, and top layer comprises liquid crystal display, matrix keyboard and sound light alarming circuit; Bottom comprises the first single-chip microcomputer, the first wireless radio frequency circuit and GSM message warning circuit; Monitoring modular circuit comprises semiconductor gas sensor, there is the second singlechip of sampling functions, can with the second wireless radio frequency circuit of the first wireless radio frequency circuit cooperating, second singlechip realizes accident according to the break-make of the information pilot relay collected and automatically processes; Main module circuit by pilot relay with the sample information of each monitoring modular circuit of certain frequency repeating query, and display in real time and analysis, when the accident that is determined with occurs, control sound light alarming circuit and send sound and light alarm, or by GSM message warning circuit, remote short messages warning is carried out to user.

Description

Poisoning and the fire alarm security system of family gas

Technical field

The utility model patent is about a kind of alarm security system, especially a kind of can poisoning and fire is reported to the police to family gas security system.

Background technology

Along with improving constantly and the adjustment of national energy structure of social life level, in the fuel that domestic gas uses in resident's daily life, proportion is increasing, especially city has become basically universal and has used canned combustion gas or pipe gas, and the universal and application of gas has played huge effect to improving The Surroundings in Cities quality with the quality of life improving resident undoubtedly.But along with widely using of combustion gas, the blast caused due to gas leakage, poisoning and fire failure also happen occasionally, and this adds the dangerous of city and labile factor to a certain extent.Meanwhile, City Building is just towards high stratification, densification future development, and the materials of the finishing of buildings and mode are also more and more diversified, day by day universal along with electronic product, and household electricity load is also more and more heavier, and the hidden danger of fire also constantly increases.Based on above-mentioned factor, develop and a kind ofly can detect the coal-fired carbonomonoxide concentration that produces and concentration of natural gas, and in time in monitoring of environmental with or without disaster hidden-trouble, guarantee fire once occur to be also necessary by the alarm security system realizing alarm function.Such people carry out early warning to the situation of gas leakage, and can adopt an effective measure controls the development of the condition of a fire simultaneously, eliminates fire in bud, thus guarantees personal safety as well as the property safety, reduce the loss to greatest extent.

Summary of the invention

At present, existing carbonmonoxide detector device is mainly in the face of the detection of industrial and mining enterprises or public place, and price is high, also inapplicable to family.Therefore, this novel design surface is to numerous residents, and its advantage is:

1) with low cost and accurately can report to the police to carbon monoxide.

2) this product operates without the need to professional, as long as be placed on correct position, be energized, use continuously, facilitate simple and direct.

3) effect that prevention CO is poisoning can be played.This product effectively can prevent the generation of numerous urban residents' coal heating in winter CO event, and can use rock gas safely to town dweller provides sound assurance simultaneously.

The research and development for large-scale places such as bulk storage plant, store, senior office building, hotels are laid particular stress on more by the manufacturer of current fire-alarm, employing be concentrated area controlling alarm mode, its system complex, cost are higher.And in small fireproof units such as residential neighborhoods, machine room, offices, need to design a kind of single, cheap practical intelligent fire alarm device.Therefore, in home environment, use the intelligent fire alarm device needing a kind of structure simple, cheap.Meanwhile, at present on the market still not by the product that anthracemia and fire alarm function merge, and family life above-mentioned functions is obviously very important.

Poisoning and the fire alarm security system of a kind of family gas, comprise a main module circuit and multiple monitoring modular circuit, wherein main module circuit divides two-layer welding, and top layer comprises liquid crystal display, matrix keyboard and sound light alarming circuit; Bottom comprises the first single-chip microcomputer, the first wireless radio frequency circuit and GSM message warning circuit, and top layer circuit is connected by double 20 pin FC winding displacements with bottom circuit; Monitoring modular circuit comprises semiconductor gas sensor, there is the second singlechip of sampling functions, can with the second wireless radio frequency circuit of the first wireless radio frequency circuit cooperating, second singlechip is according to the information analysis field accident state collected, and the break-make of pilot relay realizes accident and automatically processes; Main module circuit by radio frequency modular circuit with the sample information of each monitoring modular circuit of certain frequency repeating query, and display in real time and analysis, when the accident that is determined with occurs, control sound light alarming circuit and send sound and light alarm, or by GSM message warning circuit, remote short messages warning is carried out to user, wherein need the monitoring modular circuit address of monitoring and alarm target subscriber phone number can be arranged by keyboard.

Preferably, display in main module circuit is LCD12864 liquid crystal display, first single-chip microcomputer model is ATmega16, first, second wireless radio frequency circuit adopts 433MHz band communication module, second singlechip model is STC12C5A16S2AD, and semiconductor gas sensor is made up of the MQ-2 type to smog sensitivity and the MQ-7 type semiconductor gas sensor to carbon monoxide sensitivity.

Preferably, sound light alarming circuit is made up of active buzzer and LED, active buzzer is driven by a PNP type triode, one end ground connection of active buzzer BEEP, the other end is connected with the collector of PNP type triode S8550, the emitter of S8550 connects VCC, and base stage is connected to single-chip microcomputer pin by the resistance of a 1K.When single-chip microcomputer pin output low level, S8550 conducting, hummer is sounded; When single-chip microcomputer pin exports high level, S8550 ends, and hummer is sounding not; Hummer also has one to provide the fly-wheel diode of afterflow to drive triode to avoid damaging.

Preferably, SMS alarm circuit is made up of TC35i type GSM message warning circuit, RXD with the TXD pin of TC35i is connected with TXD and the RXD pin of single-chip microcomputer respectively and carries out serial communication.

Preferably, gas sensor constantly gathers the gas concentration such as smog and carbon monoxide information, and the concentration information of acquisition compares with pre-set threshold value by second singlechip respectively, if sampled concentrations value is greater than pre-set threshold value, the then closed and off-state of pilot relay, the accident that realizes processes automatically.

Accompanying drawing explanation

Fig. 1 is alarm security entire system block diagram;

Fig. 2 is ATmega16 singlechip minimum system circuit;

Fig. 3 is LCD12864 liquid crystal display interface circuit;

Fig. 4 is matrix keyboard interface circuit;

Fig. 5 is sound light alarming circuit;

Fig. 6 is the signal acquisition circuit that MQ-2 and MQ-7 gas sensor is formed;

Fig. 7 is schematic warning window interface.

Embodiment

As shown in Figure 1, system is made up of a main module circuit and multiple monitoring modular circuit.Monitoring modular circuit is by the concentration information of the gases such as carbon monoxide in semiconductor gas sensor collection environment, main module circuit is sent to by radio frequency modular circuit, simultaneously according to the information analysis field accident state collected, and then the break-make of pilot relay realizes accident and automatically processes.Main module circuit by radio frequency modular circuit with the sample information of each monitoring modular circuit of certain frequency repeating query, and display in real time and analysis, when the accident that is determined with occurs, control sound light alarming circuit and send sound and light alarm, or by GSM message warning circuit, remote short messages warning is carried out to user, wherein need the monitoring modular circuit address of monitoring and alarm target subscriber phone number can be arranged by keyboard, and setting is kept at inside EEPROM does not lose.Entire system block diagram as shown in Figure 1.

Main module circuit designs with the appearance forrns of handheld instrument, welds with high-quality two-sided spray tin general purpose board.Main module circuit divides two-layer welding, and top layer comprises LCD12864 liquid crystal display, matrix keyboard and sound light alarming circuit; Bottom comprises single chip computer AT mega16,433MHz frequency range wireless radio frequency circuit CC1101 and GSM message warning circuit.Top layer circuit is connected by double 20 pin FC winding displacements with bottom circuit, without fly line, connects both reliable, attractive in appearance again.

ATmega16 single-chip microcomputer is adopted in main module circuit, and use every 2 second wheels of timer to follow a monitoring modular circuit, by the monitoring modular circuit transmission acquisition sensor sample information command of CC1101 radio frequency modular circuit to assigned address, utilize the result that the negative edge triggered interrupts mode asynchronous wait target monitoring modular circuit link order of external interrupt function performs.ATmega16 is+5V power-supply system single-chip microcomputer, and in circuit, VCC provides stable direct current+5V power supply.When ATmega16 normally works, RESET pin should be high level, low level will cause monolithic processor resetting, therefore in the design of reset circuit, RESET pin is pulled upward to VCC by the resistance of a 10K, ground is connected to again by the electric capacity of a 10uF, composition automatic power-on reset circuit, an electric capacity two ends button in parallel is as hand-reset button.Have employed the high-speed quartz crystal oscillator of outside 11.0592MHz in crystal oscillating circuit, can ensure that ATmega16 microcomputer series interface communication is accurate.The minimum system circuit of ATmega16 single-chip microcomputer as shown in Figure 3.

LCD12864 liquid crystal display has serial and parallel two kinds of working methods, is selected by the 15th pin PSB pin.When PSB is high, LCD12864 is operated in parallel interface pattern; When PSB is low, LCD12864 is operated in serial interface mode.Under serial interface mode, Micro Controller Unit (MCU) driving LCD12864 only needs 3 lines, serial chip selection signal line CS, serial time clock line SCLK and serial data line SID.In order to save the I/O port of single-chip microcomputer, simplify hardware circuit, design adopts the serial interface mode of LCD12864.In circuit, PSB pin is connected to the ground and connects, select work in series mode.Enable serial communication when work in series mode bottom sheet choosing end CS is high level, CS pin is directly first connected with VCC by circuit design, enable serial communication, then serial clock port SCLK is connected with single-chip processor i/o port respectively with serial data port SID, carry out serial communication.LCD12864 liquid crystal display interface circuit as shown in Figure 4.

As shown in Figure 5, the touch key arranged by 4 row 3 forms matrix keyboard circuit, be expert at row point of crossing be connected by a touch key.BTN_L is left soft key, and BTN_R is right soft key, and BTN_2 is Menu key, and BTN0, BTN5, BTN1 and BTN3 are respectively upper and lower, left and right four direction key, and remaining reserves button for system.

Sound light alarming circuit is made up of active buzzer and LED, as shown in Figure 6.Because the working current of hummer is larger, to such an extent as to the I/O port of single-chip microcomputer cannot be sounded by Direct driver hummer, so will utilize amplifying circuit to drive.Active buzzer is driven by a PNP type triode, one end ground connection of active buzzer BEEP, the other end is connected with the collector of PNP type triode S8550, and the emitter of S8550 connects VCC, and base stage is connected to the P2.3 pin of single-chip microcomputer by the resistance of a 1K.When single-chip microcomputer pin output low level, S8550 conducting, hummer is sounded; When single-chip microcomputer pin exports high level, S8550 ends, and hummer is sounding not.Because hummer is an inductive element in essence, its electric current can not transition, a sustained diode 8 therefore must be had to provide afterflow, otherwise can produce the peak voltage of tens volts at hummer two ends, driving triode may be damaged, and disturb the other parts of whole Circuits System.

SMS alarm circuit is made up of TC35i type GSM message warning circuit, RXD with the TXD pin of TC35i is connected with TXD and the RXD pin of single-chip microcomputer respectively and carries out serial communication.Single-chip microcomputer is by sending AT command operating TC35i modular circuit to TC35i modular circuit.After powering on, wait for that TC35i modular circuit network successfully, single-chip microcomputer transmission " AT n ", if with TC35i communication normally, then return " OK "; Single-chip microcomputer sends " AT+CMGF=0 n ", and to arrange TC35i be PDU Chinese short message pattern, then the short message content after Unicode coding is sent, comprising note length, operator SMS central number, receiving end note Chinese number and Chinese short message content.

Monitoring modular circuit realizes the collection to the simulating signal that gas sensor exports by the analog-digital conversion function that main control singlechip STC12C5A16S2AD carries.Semiconductor gas sensor in modular circuit is primarily of MQ-2 type and MQ-7 type semiconductor gas sensor composition.MQ-2 type gas sensor has higher sensitivity and responsiveness to gases such as smog, and MQ-7 type gas sensor has higher sensitivity and good selectivity to carbon monoxide, as shown in Figure 6.MQ-2 type semiconductor gas sensor has different resistance values in the smoky environment of variable concentrations, by being connected in series a divider resistance resistance of change is converted to the voltage of change, magnitude of voltage after conversion is a simulating signal, can not directly calculate, so have to pass through ADC (analog/digital conversion), be converted to digital signal.The object being converted to digital signal has two: 1. the display controlling seven segment digital tubes; 2. show combustable gas concentration rank, and can judge that whether concentration value is beyond threshold value, the need of reporting to the police and being further processed.Obtain gas concentration information according to the value after ADC sampling, corresponding relation is as shown in the table.

Magnitude of voltage and combustable gas concentration value correspondence table

Voltage (V)	Concentration (%)
		3.70	0
3.64	10
		3.60	20
3.48	30
		3.31	40
2.98	50
		2.61	60
2.23	70
		1.80	80
1.01	90
		0	100

MQ-7 circuit theory is identical with MQ-2 circuit theory.

Gas sensor constantly gathers the gas concentration such as smog and carbon monoxide information, and compares with pre-set threshold value respectively, if sampled concentrations value is greater than pre-set threshold value, then and the closed and off-state of pilot relay, the automatic processing capacity of the accident that realizes.Such as: when (1) normally works, vent fan relay is in off-state, when monitoring gas concentration in environment and rise to default hazard threshold and judging accident to leak the coal gas occurs, vent fan relay is switched to closure state, circuit ON, vent fan rotates outside coal gas discharge chamber.(2) when normally working, indoor local power engage relay is in closure state, and power supply is normal, power supply pilot lamp Chang Liang; When monitoring when smokescope in environment rises to default hazard threshold and judge family fire accident occurs, indoor local power engage relay is switched to off-state, stops power supply, and power supply pilot lamp extinguishes.Fig. 7 shows schematic warning window interface.

Native system has following effect:

1) friendly human-machine interface: primary module adopts ATmega16 type AVR series monolithic to be major control chip, with LCD12864 liquid crystal display for display system, achieve the friendly human-machine interface of multilevel menu window, the switching between window interface and man-machine interaction are realized by matrix key input system.

2) data acquisition: monitoring submodule adopts STC12C5A16S2AD type 51 series monolithic to be primary controller, with MQ-2 type and MQ-7 type semiconductor gas sensor for sensing element, achieves the collection of the concentration information of smog and coal gas.

3) stable radio communication: adopt the CC1101 wireless radiofrequency module of 433MHz frequency range to communicate between primary module with monitoring submodule, achieves exchanges data stable between primary module and monitoring submodule.

4) Multi-stage alarming: the data that primary module research and application submodule gathers, judges generation state and the urgency level of accident to leak the coal gas and fire failure, reports to the police respectively in the mode sending sound and light signal and transmission GSM remote short messages.

5) accident processes automatically: the data that monitoring submodule analysis collects, the disconnection of pilot relay with closed, in conjunction with the appliance circuit composition accident automated processing system jointly of user's access.

The above, be only the preferred implementation of the application, do not limit the scope of the application with this, and all simple equivalent transformations of doing with the application's claim and description and modification, all should belong to the scope that the application covers.

Claims

1. the poisoning and fire alarm security system of family gas, comprise a main module circuit and multiple monitoring modular circuit, wherein main module circuit divides two-layer welding, and top layer comprises liquid crystal display, matrix keyboard and sound light alarming circuit; Bottom comprises the first single-chip microcomputer, the first wireless radio frequency circuit and GSM message warning circuit, and top layer circuit is connected by double 20 pin FC winding displacements with bottom circuit; Monitoring modular circuit comprises semiconductor gas sensor, there is the second singlechip of sampling functions, can with the second wireless radio frequency circuit of the first wireless radio frequency circuit cooperating, second singlechip is according to the information analysis field accident state collected, and the break-make of pilot relay realizes accident and automatically processes; Main module circuit passes through the first wireless radio frequency circuit with the sample information of each monitoring modular circuit of certain frequency repeating query, and display in real time and analysis, when the accident that is determined with occurs, control sound light alarming circuit and send sound and light alarm, or by GSM message warning circuit, remote short messages warning is carried out to user, wherein need the monitoring modular circuit address of monitoring and alarm target subscriber phone number can be arranged by keyboard.

2. the poisoning and fire alarm security system of family gas according to claim 1, it is characterized in that the display in main module circuit is LCD12864 liquid crystal display, first single-chip microcomputer model is ATmega16, first, second wireless radio frequency circuit adopts 433MHz band communication module, second singlechip model is STC12C5A16S2AD, and semiconductor gas sensor is made up of the MQ-2 type to smog sensitivity and the MQ-7 type semiconductor gas sensor to carbon monoxide sensitivity.

3. the poisoning and fire alarm security system of family gas according to claim 1, it is characterized in that sound light alarming circuit is made up of active buzzer and LED, active buzzer is driven by a PNP type triode, one end ground connection of active buzzer BEEP, the other end is connected with the collector of PNP type triode S8550, the emitter of S8550 connects DC power anode VCC, base stage is connected to single-chip microcomputer pin by the resistance of a 1K, and active buzzer also has one to provide the fly-wheel diode of afterflow to drive triode to avoid damaging.

4. the poisoning and fire alarm security system of family gas according to claim 1, it is characterized in that gas sensor gathers the gas concentration such as smog and carbon monoxide information, the concentration information of acquisition compares with pre-set threshold value by second singlechip respectively, if sampled concentrations value is greater than pre-set threshold value, the then closed and off-state of pilot relay, the accident that realizes processes automatically.