CN202584335U - Fire hazard alarm device - Google Patents

Fire hazard alarm device Download PDF

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Publication number
CN202584335U
CN202584335U CN 201120531144 CN201120531144U CN202584335U CN 202584335 U CN202584335 U CN 202584335U CN 201120531144 CN201120531144 CN 201120531144 CN 201120531144 U CN201120531144 U CN 201120531144U CN 202584335 U CN202584335 U CN 202584335U
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CN
China
Prior art keywords
amplifying circuit
light
sensor
receiving
pin
Prior art date
Application number
CN 201120531144
Other languages
Chinese (zh)
Inventor
孙军文
姚燕
Original Assignee
浙江同兴建设有限公司
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Priority to CN 201120531144 priority Critical patent/CN202584335U/en
Application granted granted Critical
Publication of CN202584335U publication Critical patent/CN202584335U/en

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Abstract

The utility model provides a fire hazard alarm device which includes a temperature sensor, a scattering optical smog sensor, a combustible gas sensor, a first amplification circuit, a second amplification circuit, and a controller. The output terminal of the scattering optical smog sensor is connected with the input terminal of the first amplification circuit, and the output terminal of the combustible gas sensor is connected with the input terminal of the second amplification circuit. The input terminal of the first amplification circuit, the input terminal of the second amplification circuit and the output terminal of the temperature sensor are connected with the control unit. The scattering optical smog sensor includes a light transmitting part which can transmit detection light, a light receiving part which receives the detection light, and a shield plate which is arranged between the light transmitting part and the light receiving part and can shield the detection light transmitted by the light transmitting part, so the light receiving part can not receive the detection light directly. The optical axis of the light transmitting part and the optical axis of the light receiving part intersect at a point below the shielding plate. The fire hazard alarm device is compact in structure and is high in detection precision.

Description

A kind of fire alarm installation

Technical field

The utility model relates to the technical field that Building Fire Protection is reported to the police, particularly a kind of fire alarm installation that can detect indoor inflammable gas, temperature and smog simultaneously.

Background technology

Fire almost is simultaneous with utilizing of fire, again along with the development of society, and the increase of material values, and cause more bigger harm.City particularly has that buildings is close, population concentration, property concentrate, and the combustible and explosive articles source is many, put big, the wide characteristics of volume, thereby brings more fire and hidden peril of explosion.In case breaking out of fire and blast, casualties is big, and economic loss is serious.

The statistics of fire department shows that in all fire ratios, family fire has accounted for about 30% of national fire.In recent years, the family that has the smoke-sensitive alarm device increases to some extent, and the catch fire death toll that causes of dwelling house has almost reduced half the.The smog of incipient fire can accumulate under the indoor ceiling, and smoke detector can real time monitoring be surveyed the existence of smog, about every 45s environment is carried out periodicity detection; Alarm detects through inner intelligent processor induction discrete light source, small soot and aerosol; In case detect smog; At once through a built-in application-specific integrated circuit driving circuit and an outside piezoelectric transducer output alarm sound; Make people learn the condition of a fire early, with fire suppression in bud.

The principle of work of traditional sense cigarette type fire-alarm is: a built-in emission is to pipe (i.e. a light-emitting component and a light activated element).Under normal circumstances, the light scioptics that light source sends are mapped on the light activated element, and circuit is kept normally; And if have smog therefrom to intercept, the light that arrives on the light activated element just significantly weakens, so light activated element just becomes intensity variations the variation of electricity, reports to the police to people through amplifying circuit.

Traditional flammable gas alarm (carbon monoxide alarm) is to respond to the concentration of CO gas in the air through carbon monoxide transducer, and is converted into electric signal.The size of electric signal is relevant with the concentration of carbon monoxide.Carbon monoxide alarm is classified by employed sensor; Generally be divided into semiconductor carbon monoxide alarm, galvanochemistry carbon monoxide alarm, Infrared Carbon Monoxide Detection appearance etc.; From measuring sensitivity, precision, stability, the interference of anti-intersection gas; What performance was best is the Infrared Carbon Monoxide Detection appearance, but relatively more expensively is fit to the laboratory and uses, civilian semiconductor and the electrochemical carbon monoxide alarm of being generally.

Yet the smoke transducer poor reliability of prior art for example, if there is foreign matter (winged insect) etc. to get into sensor internal, is probably blocked light path, causes wrong report.In addition, still there is not a kind of integrated fire alarm installation of temperature sensor, smoke transducer and combustible gas sensor in the existing market yet.

The utility model content

In view of the above-mentioned deficiency of prior art, the utility model provides a kind of and has had improved smoke-detectors, and can detect the fire alarm installation of indoor inflammable gas, temperature and smog simultaneously.

An aspect according to the utility model provides a kind of fire alarm installation, comprising: temperature sensor, scatter-type optical smoke sensor, combustible gas sensor, first amplifying circuit, second amplifying circuit and controller; Wherein, The output of said scatter-type optical smoke sensor and combustible gas sensor is connected respectively to the input of said first amplifying circuit and second amplifying circuit, and the input of said first amplifying circuit and second amplifying circuit and the output of said temperature sensor are connected to control module; Wherein, said scatter-type optical smoke sensor comprises: light emitting members is used to send detect and uses up; Light-receiving member is used for receiving detecting and uses up, and is arranged on the shadow shield between said light emitting members and the said light-receiving member, and the detection that is used to block from light emitting members is used up, and makes light-receiving member can't directly receive this detection and uses up; Wherein, the optical axis of said light emitting members and light-receiving member intersects each other in a point that is positioned under the said shadow shield.

In addition, the temperature sensor of the utility model can adopt the R2868 UV TRON ultraviolet detector of HAMAMATSU, and combustible gas sensor can adopt the combustible gas sensor TGS 813 of FIGARO.And said first amplifying circuit and second amplifying circuit comprise the two-stage amplifying circuit respectively.

The fire alarm installation compact conformation of the utility model, accuracy of detection is high, and rate of false alarm is extremely low.

Description of drawings

Fig. 1 is the external structure synoptic diagram of the fire alarm installation of the utility model;

Fig. 2 is that the element of the fire alarm installation of the utility model connects synoptic diagram;

Fig. 3 is the scatter-type optical smoke principle of sensors property structural drawing of the utility model; And

Fig. 4 is the electrical block diagram of first and second amplifying circuits in the control module in the fire alarm installation of the utility model.

Embodiment

Below, with the embodiment of accompanying drawings the utility model.

Fig. 1 is the external structure synoptic diagram of the fire alarm installation of the utility model.As scheme saidly, this fire alarm installation 1 can be installed on positions such as roof.The fire alarm installation 1 of the utility model adopts the conventional design of prior art, is range upon range of cylindrical shape, is provided with a plurality of air hole 2 in the bottom, is used to make that temperature in the fire alarm installation 1, gas componant etc. are consistent with the external environment condition of fire alarm installation 1.

The element that Fig. 2 shows the fire alarm installation 1 of the utility model connects synoptic diagram (having ignored shell body).As shown in Figure 2; The inner member of the fire alarm installation 1 of the utility model comprises: temperature sensor 21, scatter-type optical smoke sensor 22, combustible gas sensor 23, first amplifying circuit 24, second amplifying circuit 25 and controller 26; The output of said scatter-type optical smoke sensor 22 and combustible gas sensor 23 is connected respectively to the input of said first amplifying circuit 24 and second amplifying circuit 25, and the input of said first amplifying circuit 24 and second amplifying circuit 25 and the output of said temperature sensor 21 are connected to control module 26.

The principle of work of the fire alarm installation 1 of the utility model is following.

Said temperature sensor 21, scatter-type optical smoke sensor 22 and combustible gas sensor 23 detect indoor temperature, smokescope and combustable gas concentration respectively.The faint output signal of 25 pairs of said scatter-type optical smoke sensors 22 of said first amplifying circuit 24 and second amplifying circuit and combustible gas sensor 23 amplifies.Temperature detection result signal after the amplification and Smoke Detection consequential signal are input to controller 26 together with the temperature detection result signal of said temperature sensor 21.The temperature detection result signal of this controller 26 after with said amplification, the Smoke Detection consequential signal after amplifying and temperature detection result signal and preset threshold value compare respectively; If one or the above predetermined threshold value that surpasses in above-mentioned three signals, then this controller 26 is to signals that gives the alarm such as hummer (not shown) or security center, sub-district (not shown).

Preferably, the temperature sensor 21 of the utility model can adopt the R2868 UVTRON ultraviolet detector of HAMAMATSU.R2868 makes and utilizes photoelectric metal and gas multiplicative effect, has angle sensitivity (directivity) widely, and can detect the faint ultraviolet ray that goes out from Fire Radiation rapidly reliably.

Preferably, the combustible gas sensor 23 of the utility model can adopt the combustible gas sensor TGS 813 of Japanese Figaro FIGARO.The TGS813 sensor is highly sensitive to methane, propane, butane, and is also very desirable to the supervision of rock gas, liquefied gas.This sensor can detect multiple inflammable gas, so be the low-cost sensor all very superior to various application modes.The range of combustible gas sensor TGS 813 is 500-10000ppm, and sensitivity is 0.60 ± 0.05 (resistance ratio).

The control module 26 of the utility model can adopt single-chip microcomputer commonly used.Because the structure of this control module 26 is well known to those skilled in the art but not the invention main points of the utility model, therefore repeat no more at this.

Next, will specify the structure of the scatter-type optical smoke sensor 22 of the utility model with reference to Fig. 3.

This scatter-type optical smoke sensor 22 comprises light emitting members 31 (for example LED light-emitting device), is used to send detect use up; Light-receiving member 32; Be used for receiving detecting and use up; And being arranged on the shadow shield 33 between said light emitting members 31 and the said light-receiving member 32, the detection that is used to block from light emitting members 31 is used up, and makes light-receiving member 32 can't directly receive this detection and uses up.The optical axis A1 of said light emitting members 31 and the optical axis A2 of light-receiving member 32 intersect each other in P point (that is, check point), and this P point is positioned under the shadow shield 33 and outside the transparent panel 34 of this scatter-type optical smoke sensor 22.

Under normal condition, because the smog that does not produce because of burning in the air at P point place, it is not obvious therefore to detect the dispersion effect of using up, and uses up thereby light-receiving member 32 can't receive to detect.And have smog in the air at P point place, and then detect and use up at the dispersion effect at P point place obviously, make light-receiving member 32 receive to detect and use up, thereby produce detection signal.Because check point (P point) is positioned under the shadow shield 33 and outside the transparent panel 34 of this scatter-type optical smoke sensor 22; Therefore need not complicated optics labyrinth and test chamber are set in scatter-type optical smoke sensor 22, thereby reduced the overall volume of scatter-type optical smoke sensor 22.

Below, first amplifying circuit 24 and second amplifying circuit 25 that adopt in the utility model are described.These two amplifying circuits are used for respectively the faint output signal of said scatter-type optical smoke sensor 22 and combustible gas sensor 23 is amplified, and the structure of these two amplifying circuits is identical.Fig. 3 shows the circuit structure of these two amplifying circuits.

As shown in Figure 3, first amplifying circuit 24 (second amplifying circuit 25) comprises first order amplifying circuit and second level amplifying circuit.This first order amplifying circuit comprises that model is the first operational amplifier U1 and the second operational amplifier U2 and the 1st resistance R 1 to the 6th resistance R the 6, the 1st capacitor C 1 to the 11st capacitor C 11 of ICL7650 (the chopper-zero-stabilized formula high-operational amplifier that Intersil company utilizes dynamic school zero technology and CMOS technology to make).This second level amplifying circuit comprises that model is the 3rd operational amplifier U3, the 7th resistance R 7 to the 9th resistance R 9 and the 12nd capacitor C 12 to the 15th capacitor C 15 of ICL7650.

3 pin of the first operational amplifier U1 meet input end V2 through the 1st resistance R 1, and the two ends of the 1st resistance R 1 connect the 3rd capacitor C 3 respectively through the 1st capacitor C 1 and the 2nd capacitor C 2 ground connection between 8 pin of the first operational amplifier U1 and 5 pin; Connect the 4th capacitor C 4,7 pin between 1 pin and 5 pin and connect+the 5V power supply, 4 pin connect-the 5V power supply; Connect the 2nd resistance R 2 and the 10th capacitor C 10 of parallel connection between 2 pin and 6 pin; 3 pin of the second operational amplifier U2 meet input end V1 through the 4th resistance R 4, and the 4th resistance R 4 two ends connect the 8th capacitor C 8 respectively through the 6th capacitor C 6 and the 7th capacitor C 7 ground connection between 8 pin of the second operational amplifier U2 and 5 pin; Connect the 9th capacitor C 9 between 1 pin and 5 pin; 7 pin connect+the 5V power supply, and 4 pin connect-the 5V power supply, connect the 5th resistance R 5 and the 11st capacitor C 11 of parallel connection between 2 pin and 6 pin; 6 pin that connect the 3rd resistance R 3, the second operational amplifier U2 between 2 pin of 2 pin of the first operational amplifier U1 and the second operational amplifier U2 are through the 6th resistance R 6 and the 5th capacitor C 5 ground connection.

2 pin of the 3rd operational amplifier U3 connect the 7th resistance R the 7, the 8th resistance R 8 and the 12nd capacitor C 12; The other end of the 7th resistance R 7 connects 6 pin and the 13rd capacitor C 13 of the first operational amplifier U1; The other end of the 8th resistance R 8 connects output pin 6 pin of the 3rd operational amplifier U3 and the other end of the 13rd capacitor C 13, another termination the 5th capacitor C 5 and ground connection of the 12nd capacitor C 12, and 3 pin of the 3rd operational amplifier U3 are through the 9th resistance R 9 ground connection; Connect the 14th capacitor C 14 between 8 pin and 5 pin; Connect the 15th capacitor C 15,7 pin between 1 pin and 5 pin and connect+the 5V power supply, 4 pin connect-the 5V power supply.

Utilize the fire alarm installation of the utility model, can detect indoor inflammable gas, temperature and smog simultaneously, and the three any one exceeds predetermined threshold value at least the time, in time give the alarm.

It will be understood by those skilled in the art that above-mentioned explanation and instance only are exemplary, and be not the scope that is used to limit the utility model.Under the degree of the scope that does not exceed the utility model that limits like claims, can carry out various improvement to the utility model.

Claims (3)

1. a fire alarm installation is characterized in that, comprising: temperature sensor, scatter-type optical smoke sensor, combustible gas sensor, first amplifying circuit, second amplifying circuit and controller,
Wherein, The output of said scatter-type optical smoke sensor and combustible gas sensor is connected respectively to the input of said first amplifying circuit and second amplifying circuit; The input of said first amplifying circuit and second amplifying circuit and the output of said temperature sensor are connected to control module
Wherein, said scatter-type optical smoke sensor comprises:
Light emitting members is used to send detect and uses up;
Light-receiving member is used for receiving detecting and uses up, and
Be arranged on the shadow shield between said light emitting members and the said light-receiving member, the detection that is used to block from light emitting members is used up, and make light-receiving member can't directly receive this detection and use up,
Wherein, the optical axis of said light emitting members and light-receiving member intersects each other in a point that is positioned under the said shadow shield.
2. fire alarm installation as claimed in claim 1 is characterized in that: said first amplifying circuit and second amplifying circuit comprise first order amplifying circuit and second level amplifying circuit respectively.
3. fire alarm installation as claimed in claim 2 is characterized in that: the operational amplifier in said first order amplifying circuit and the said second level amplifying circuit is an Intersil ICL7650 amplifier.
CN 201120531144 2011-12-19 2011-12-19 Fire hazard alarm device CN202584335U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201120531144 CN202584335U (en) 2011-12-19 2011-12-19 Fire hazard alarm device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201120531144 CN202584335U (en) 2011-12-19 2011-12-19 Fire hazard alarm device

Publications (1)

Publication Number Publication Date
CN202584335U true CN202584335U (en) 2012-12-05

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN 201120531144 CN202584335U (en) 2011-12-19 2011-12-19 Fire hazard alarm device

Country Status (1)

Country Link
CN (1) CN202584335U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104469312A (en) * 2014-12-12 2015-03-25 成都栖林测控科技有限责任公司 Vision-based fire detecting device and method
CN108777051A (en) * 2018-09-20 2018-11-09 广州通达汽车电气股份有限公司 Fire alarm method, device, computer equipment and storage medium

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104469312A (en) * 2014-12-12 2015-03-25 成都栖林测控科技有限责任公司 Vision-based fire detecting device and method
CN108777051A (en) * 2018-09-20 2018-11-09 广州通达汽车电气股份有限公司 Fire alarm method, device, computer equipment and storage medium

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C14 Grant of patent or utility model
GR01 Patent grant
C17 Cessation of patent right
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20121205

Termination date: 20131219