CN201464049U

CN201464049U - Infrared flame detector

Info

Publication number: CN201464049U
Application number: CN2009201241673U
Authority: CN
Inventors: 吴志洪; 尹碧波
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-07-09
Filing date: 2009-07-09
Publication date: 2010-05-12
Anticipated expiration: 2019-07-09

Abstract

The utility model discloses an infrared flame detector, which comprises a housing (1), and a transparent protective hood (3) which is embedded on the housing, dual-wavelength infrared sensor components (4) and a warner (6) connected with a control component (2); a slope-shaped bracket (5) fixedly connected with the housing (1) is arranged in the transparent protective hood (3); detection devices are arranged on the left side and the right side of the slope-shaped bracket (5) respectively; and each detection device comprises the dual-wavelength infrared sensor component (4) connected with the control component (2). The infrared flame detector has the characteristics of large view angel and high detection sensitivity.

Description

Infrared flame detector

Technical field

The utility model relates to a kind of fire early-warning system, particularly a kind of infrared flame detector.

Background technology

Infrared flame detector can be used for fire alarm.Traditional infrared flame detector mostly for surveying design outside the Shan Hong, causes the anti-interference of integral product not strong, is subjected to the influence of various environmental interference easily and causes wrong report; On adaptive faculty to environment, interference sources such as natural light, sunlight, light, electric welding can cause very big influence to flame detector outside this type of Shan Hong, so flame detector is very high to the requirement of environment for use outside the Shan Hong, can not satisfy user's various requirement well; And owing to the sampling resistor of flame detector inside outside the Shan Hong is very big, infrared sensor should not use under vibrations, the environment that rocks, and flame detector can only be sacrificed detector sensitivity and detection range satisfies request for utilization outside the Shan Hong of using under environment like this; Simultaneously, the detection visual angle of flame detector generally can only reach 80 degree outside the Shan Hong, and the protection area is little; Can not form the visual angle circular cone of a cosine relation.

The patent No. is the infrared flame detector after 200620040791.1 patent " dual wavelength infrared flame detector " provides a kind of the improvement, it comprises 2 infrared ray sensors with different receiving wave ranges, and infrared ray sensor links to each other with central processing unit (being single-chip microcomputer) by signal processing circuit.The Infrared wavelength of these 2 infrared ray sensors is respectively 3.8um and 4.3um, and 4.3um is in close proximity to the centre frequency of flame, and the infrared ray sensor of 3.8um is not corresponding with flare up fire; Therefore the dual wavelength infrared flame detector of this kind structure has possessed very high anti-error alert capability, and its sensitivity and detection range also improve greatly.The visual angle is surveyed on its plane can reach 120 degree.But it still exists following defective:

1, the planes of 120 degree are surveyed visual angles and are still existed and survey the dead angle, cause the sensitivity of this infrared flame detector still can not satisfy user's demand;

2, when existing solar radiation or light to shine with certain frequency (shortwave), the phenomenon that can occur reporting by mistake still.

The utility model content

The technical problems to be solved in the utility model provides a kind ofly can accurately carry out flame detecting and accurately warning, antijamming capability and adaptive capacity to environment are strong, survey visual angle big (can reach 180 degree), infrared flame detector that detection sensitivity is high.

In order to solve the problems of the technologies described above; the utility model provides a kind of infrared flame detector; comprise housing, be flush-mounted in transparent protective shield, dual wavelength infrared ray sensor assembly on the housing and the alarm that links to each other with Control Component; be provided with the domatic support that is fixedly linked with housing in the transparent protective shield; at the left and right sides of domatic support face one cover sniffer is set respectively; every cover sniffer comprises a dual wavelength infrared ray sensor assembly, and dual wavelength infrared ray sensor assembly links to each other with Control Component.

Improvement as infrared flame detector of the present utility model: every cover sniffer also comprises a silicon photo diode, and silicon photo diode links to each other with Control Component.

Further improvement as infrared flame detector of the present utility model: Control Component comprises match circuit I, the automatic gain frequency selection circuit I and detecting circuit I and the match circuit II that links to each other successively, automatic gain frequency selection circuit II and detecting circuit II that links to each other successively, detecting circuit I links to each other with an end of band AD function single-chip microcomputer respectively with detecting circuit II, and the other end of band AD function single-chip microcomputer links to each other with alarm with output driving circuit successively; The dual wavelength infrared ray sensor assembly that is positioned at domatic support left surface all links to each other with match circuit I with silicon photo diode, and the dual wavelength infrared ray sensor assembly that is positioned at domatic support right flank all links to each other with match circuit II with silicon photo diode.

Further improvement as infrared flame detector of the present utility model: dual wavelength infrared ray sensor assembly comprises Thermoelectric Infrared Sensor I and the Thermoelectric Infrared Sensor II that wavelength does not wait; Thermoelectric Infrared Sensor I and Thermoelectric Infrared Sensor II all are fixedly linked with the domatic support.

Further improvement as infrared flame detector of the present utility model: the Infrared wavelength that Thermoelectric Infrared Sensor I received is 4.4um, the Infrared wavelength that Thermoelectric Infrared Sensor II received is 5.5um, and the Infrared wavelength that silicon photo diode received is 0.7～1.1um.

Further improvement as infrared flame detector of the present utility model: the left surface of domatic support becomes 60 °～80 ° angle with right flank, and the optimum angle value is 70 °.

Infrared flame detector of the present utility model, owing to selected for use and had dual wavelength infrared ray sensor assembly and the silicon photo diode that Different Red receives wave band outward, therefore can receive the radiation energy that flame sends to greatest extent, MINly prevent non-fire interference source.Infrared flame detector of the present utility model, carry out data analysis and calculation process by variation ratio and corresponding relation with Thermoelectric Infrared Sensor I, Thermoelectric Infrared Sensor II and silicon photo diode acquired signal, thereby only the state in the flame characteristic frequency range is reported to the police, possessed very high anti-error alert capability, overcome the contradiction between detection sensitivity and the false alarm, both had high detection sensitivity, had the not available non-fire interference source recognition capability of traditional flame detector again.Detector of the present utility model has overcome the defective that conventional Shan Hong outer sensor should not use under the environment that shakes, rocks, its sensitivity and detection range are improved greatly.

Infrared flame detector of the present utility model, owing to one cover sniffer (every cover sniffer comprises a dual wavelength infrared ray sensor assembly and a silicon photo diode), therefore the detection visual angle of having improved this detector greatly respectively is set at the left and right sides of domatic support face; Can reach the investigative range of 180 degree; Therefore infrared flame detector of the present utility model has the big and high advantage of detection sensitivity of the guard space of detection, can realize accurately reporting to the police.The Control Component of infrared flame detector of the present utility model adopts the circuit modular design, not only can improve the anti-electromagnetic interference capability of this detector, can also be easy to install and maintain.

Description of drawings

Below in conjunction with accompanying drawing embodiment of the present utility model is described in further detail.

Fig. 1 is the structural representation of infrared flame detector of the present utility model;

Fig. 2 is the synoptic diagram of the circuit control among Fig. 1.

Embodiment

Fig. 1～Fig. 2 comprises housing 1, Control Component 2, transparent protective shield 3, sniffer, domatic support 5 and alarm 6 in conjunction with having provided a kind of infrared flame detector.Transparent protective shield 3 is flush-mounted on the housing 1, and transparent protective shield 3 for example can be selected cloche for use.

In transparent protective shield 3, be provided with the domatic support 5 that is fixedly linked with housing 1; the left surface of this domatic support 5 becomes 70 ° angle with right flank; this left surface and right flank are symmetrically located at the left and right sides of domatic support 5 center lines. and left surface and right flank at domatic support 5 respectively are provided with a cover sniffer; every cover sniffer is made up of a dual wavelength infrared ray sensor assembly 4 and a silicon photo diode 7, and each dual wavelength infrared ray sensor assembly 4 is formed by Thermoelectric Infrared Sensor I 41 and the Thermoelectric Infrared Sensor II 42 that wavelength does not wait.Promptly fixedly install a Thermoelectric Infrared Sensor I 41, a Thermoelectric Infrared Sensor II42 and a silicon photo diode 7 respectively, also fixedly install a Thermoelectric Infrared Sensor I 41, a Thermoelectric Infrared Sensor II 42 and a silicon photo diode 7 at the right flank of domatic support 5 at the left surface of domatic support 5.The Infrared wavelength that Thermoelectric Infrared Sensor I 41 is received is 4.4um, and the Infrared wavelength that Thermoelectric Infrared Sensor II 42 is received is 5.5um, and the Infrared wavelength that silicon photo diode 7 is received is 0.7～1.1um.

Control Component 2 comprises match circuit I 21, automatic gain frequency selection circuit I 22, detecting circuit I 23, band AD function single-chip microcomputer 24, output driving circuit 25, match circuit II 26, automatic gain frequency selection circuit II27 and detecting circuit II 28.Match circuit I 21, automatic gain frequency selection circuit I 22 link to each other successively with detecting circuit I 23, and match circuit II26, automatic gain frequency selection circuit II 27 link to each other successively with detecting circuit II 28; Detecting circuit I 23 links to each other with an end of band AD function single-chip microcomputer 24 respectively with detecting circuit II 28, and the other end of band AD function single-chip microcomputer 24 links to each other with alarm 6 with output driving circuit 25 successively.The Thermoelectric Infrared Sensor I 41, the Thermoelectric Infrared Sensor II42 that are positioned at domatic support 5 left surfaces link to each other with match circuit I 21 respectively with silicon photo diode 7, and the Thermoelectric Infrared Sensor I 41, the Thermoelectric Infrared Sensor II 42 that are positioned at domatic support 5 right flanks link to each other with match circuit II 26 respectively with silicon photo diode 7.

During infrared flame detector real work of the present utility model, Control Component 2 can be respectively judged whether breaking out of fire of detection range by sniffer that is positioned at domatic support 5 left surfaces and the sniffer that is positioned at domatic support 5 right flanks, when result of determination is " fire ", just order alarm 6 that warning message takes place; Therefore as long as signal that any cover sniffer receives is arranged when Control Component 2 is judged to be " fire ", just warning message can take place; Particular content is as follows:

1, is arranged in Thermoelectric Infrared Sensor I 41, the Thermoelectric Infrared Sensor II 42 of domatic support 5 left surfaces and the signal that silicon photo diode 7 is gathered environment respectively; Above-mentioned signal is passed to automatic gain frequency selection circuit I 22 then and carries out frequency-selecting and regulate the amplitude processing after the noiselike signal processing and amplifying of match circuit I 21, then is passed to detecting circuit I 23 again and carries out the detection processing; Thereby by being with AD function single-chip microcomputer 24 to judge whether the signal that sends for flame; When being defined as the signal that flame sends, order output driving circuit 25 makes alarm 6 send alerting signal.

Because the Infrared wavelength that Thermoelectric Infrared Sensor I 41 is received is 4.4um, therefore have only its centre frequency corresponding with flame; And the wavelength of Thermoelectric Infrared Sensor II42 and silicon photo diode 7 is all not corresponding with flare up fire, and silicon photo diode 7 is used for the interference of filtering solar radiation, and the infrared radiation that Thermoelectric Infrared Sensor II 42 is used for the filtering environmental interference source disturbs; Thereby can guarantee the correctness of reporting to the police.

2, in like manner, be arranged in Thermoelectric Infrared Sensor I 41, the Thermoelectric Infrared Sensor II 42 of domatic support 5 right flanks and the signal that silicon photo diode 7 is gathered environment respectively; Above-mentioned signal is passed to automatic gain frequency selection circuit II27 then and carries out frequency-selecting and regulate the amplitude processing after the noiselike signal processing and amplifying of match circuit II 26, then is passed to detecting circuit II28 again and carries out the detection processing; Thereby by being with AD function single-chip microcomputer 24 to judge whether the signal that sends for flame; When being defined as the signal that flame sends, order output driving circuit 25 makes alarm 6 send alerting signal.

At last, it is also to be noted that what more than enumerate only is a specific embodiment of the present utility model.Obviously, the utility model is not limited to above embodiment, and many distortion can also be arranged.All distortion that those of ordinary skill in the art can directly derive or associate from the disclosed content of the utility model all should be thought protection domain of the present utility model.

Claims

1. infrared flame detector; comprise housing (1), be flush-mounted in transparent protective shield (3), dual wavelength infrared ray sensor assembly (4) on the housing (1) and the alarm (6) that links to each other with Control Component (2); it is characterized in that: be provided with the domatic support (5) that is fixedly linked with housing (1) in the transparent protective shield (3); left and right sides face at domatic support (5) respectively is provided with a cover sniffer; described every cover sniffer comprises a dual wavelength infrared ray sensor assembly (4), and dual wavelength infrared ray sensor assembly (4) links to each other with Control Component (2).

2. infrared flame detector according to claim 1 is characterized in that: described every cover sniffer also comprises a silicon photo diode (7), and described silicon photo diode (7) links to each other with Control Component (2).

3. infrared flame detector according to claim 2, it is characterized in that: described Control Component (2) comprises match circuit I (21), the automatic gain frequency selection circuit I (22) and detecting circuit I (23) and the match circuit II (26) that links to each other successively, automatic gain frequency selection circuit II (27) and detecting circuit II (28) that links to each other successively, described detecting circuit I (23) links to each other with an end of band AD function single-chip microcomputer (24) respectively with detecting circuit II (28), and the other end of band AD function single-chip microcomputer (24) links to each other with alarm (6) with output driving circuit (25) successively; The dual wavelength infrared ray sensing assembly (4) that is positioned at domatic support (5) left surface all links to each other with match circuit I (21) with silicon photo diode (7), and the dual wavelength infrared ray sensing assembly (4) that is positioned at domatic support (5) right flank all links to each other with match circuit II (26) with silicon photo diode (7).

4. infrared flame detector according to claim 3 is characterized in that: described each dual wavelength infrared ray sensor assembly (4) comprises Thermoelectric Infrared Sensor I (41) and the Thermoelectric Infrared Sensor II (42) that wavelength does not wait; Described Thermoelectric Infrared Sensor I (41) and Thermoelectric Infrared Sensor II (42) all are fixedly linked with domatic support (5).

5. infrared flame detector according to claim 4, it is characterized in that: the Infrared wavelength that Thermoelectric Infrared Sensor I (41) is received is 4.4um, the Infrared wavelength that Thermoelectric Infrared Sensor II (42) is received is 5.5um, and the Infrared wavelength that silicon photo diode (7) is received is 0.7～1.1um.

6. according to claim 4 or 5 described infrared flame detectors, it is characterized in that: the left surface of described domatic support (5) becomes 60 °～80 ° angle with right flank.

7. infrared flame detector according to claim 6 is characterized in that: the left surface of described domatic support (5) becomes 70 ° angle with right flank.