CN1089741A - Fire alarm with image distinguish function - Google Patents
Fire alarm with image distinguish function Download PDFInfo
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- CN1089741A CN1089741A CN 93114042 CN93114042A CN1089741A CN 1089741 A CN1089741 A CN 1089741A CN 93114042 CN93114042 CN 93114042 CN 93114042 A CN93114042 A CN 93114042A CN 1089741 A CN1089741 A CN 1089741A
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- color filter
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Abstract
The present invention discloses a kind of scene that is used for and carries out image recognition monitoring fire and warning device, is made of optic probe, control circuit, image pick-up card, control panel and microcomputer.Under software is supported, with the differentiation of pixel gray-scale value not flame existence is arranged, be flame or fire with the identification of imagery coverage rate of growth, determine the concrete position that fire takes place with visualizing monitor, by the monitoring in the The Cloud Terrace and the comprehensive visual field of commutation circuit realization list/multichannel.Be applicable to public place, workshop and warehouse, be particularly useful for large space and the interior fire monitoring of buildings on a large scale.
Description
The present invention relates to fire safety evaluating monitoring and panalarm automatically.
Fire brings very big threat for human life and property, therefore the monitoring of fire is caused the attention of countries in the world.At present, general according to monitoring that at least a physics that is associated with fire or chemical phenomenon are foundation continuously or intermittently, judged whether that fire takes place, it surveys mode deeply can divide sense cigarette type, temperature sensitive type, gaseous type and photosensitive type usually.By contrast, photosensitive type detection (as CN86106890A), be come detection of fires by the perception flame radiation generation whether, it is fast to have response speed, surveys advantage timely.But existing photosensitive type fire detection technology can only be found out flame or fire and be occurred in certain monitored area, but can't determine the concrete position that flame or fire take place, and more can't differentiate flame or fire.
The objective of the invention is defective at the prior art existence, utilize the sensitization detection principle, fire according to early stage generation, the feature of its flame geometrical body development and change in time, proposition utilizes the method for image recognition, distinguish the generation of fire, and accurately monitor the position that fire takes place, implement simultaneously and report to the police.
Purpose of the present invention can realize with following measure: use CCD(computer controlleddisplay) camera technique, take in viewable pictures, the monitoring fire takes place in early days, the visual effect of flame geometrical body in the evolution.By image comparison techniques, distinguished that in time fire does not take place.Concrete technical scheme can be divided list/multichannel monitoring, promptly comprise cover (road) optic probe and probe control circuit at least, the vision signal of optic probe output is directly or through the circuit switch image pick-up card of feeding, it deposits among the DRAM after with video signal digitization, simultaneously again digital picture among the DRAM is converted to vision signal and sends in the microcomputer, on computer screen, form image.Microcomputer is given control panel after the data of being gathered are handled, the exportable a plurality of control signals of this control panel (A-H), control circuit switch, alarm and probe control circuit respectively.
Purpose of the present invention also can reach by following measure: said optic probe comprises pick-up lens and camera lens monitor, this pick-up lens is installed on the rotatable The Cloud Terrace, dispose visible filter and color filter travel mechanism before pick-up lens, this color filter travel mechanism and pick-up lens all link with The Cloud Terrace.Said The Cloud Terrace and color filter travel mechanism are driven by the probe control circuit.The probe control circuit comprises automatic reset circuit and cradle head control device, and the former controls the action of color filter travel mechanism, and the latter handles the rotation status of The Cloud Terrace.The structure of color filter travel mechanism is: drive crank by direct current generator by reduction gearing and rotate, crank drives slide block by connecting rod again and moves in chute, and said pick-up lens can be embedded on the chute, also can keep certain distance with camera aperture on the chute.Visible filter is embedded on the slide block.Motor rotates by crank and connecting rod, drives slide block and moves in chute, will not add color filter before the control pick-up lens.For the position of control slide block in chute, radially upper limit position switch and lower position switch are set two ends respectively in reduction gearing.
The present invention compared with prior art, having image shows and the fire monitoring double effects, can not only in time find and reflect the visual effect of the geometrical body of flame in fire generation and the evolution, and can distinguish the feature of fire and flame, and demonstrate scope and concrete position that fire takes place.This device is suitable for public place, workshop and warehouse to carry out the fire safety evaluating monitoring and reports to the police automatically, is particularly useful for large space and the interior fire monitoring of buildings on a large scale.
Description of drawings:
Fig. 1 is a general structure block diagram of the present invention
Fig. 2 is color filter travel mechanism [a 10] synoptic diagram
Fig. 3 is control panel [a 6] synoptic diagram
Fig. 4 is that automatic reset circuit [8] adds electrical schematic
Fig. 5 distinguishes for the image real time scan and reads and the alarm software process flow diagram
Embodiment further describes below in conjunction with (accompanying drawing):
Fig. 1 is the general structure block diagram.In optic probe 1, pick-up lens 11 is installed on the rotatable PIH-305S The Cloud Terrace 12, has any visual field below 360 °.Driving The Cloud Terrace 12 with PIH-306 type cradle head control device 9 horizontally rotates.From the control signal (C, D) of control panel 6, can select the left-handed or dextrorotation of The Cloud Terrace, change the visual field of pick-up lens 11.Can observe intuitively by camera lens monitor 13.In the time of in flame appears at pick-up lens 11 monitoring ranges, its flame radiation is compared with the radiation of surrounding environment background, and notable difference is arranged on the signal intensity.Installing a band wave arrestment section before pick-up lens 11 again additional is 400-780nm color filter 21, elimination visible light composition, make 11 of pick-up lenss survey the ultraviolet of scenery or the optical radiation in the region of ultra-red, its effect is particularly remarkable, not only can ignore mainly is that day alternates with night and the influence of background radiation such as lighting for the visible spectrum composition, improve the signal to noise ratio (S/N ratio) of flame detecting,, adopt image recognition technology that application foundation is provided also for to read principle for distinguishing with the pixel gray-scale value.Because of containing abundant ultraviolet and infrared composition in the flame spectrum, by color filter 21, pick-up lens 11 can be taken the photograph into image with flame and profile thereof, thereby can detect effectively whether the flame appearance is arranged in institute's monitoring range, and on monitor 13, demonstrate the shape and the residing position thereof of flame.Color filter 21 before the pick-up lens 11 can about (or about) move, according to different observed contents, whether decision pick-up lens 11 keeps somewhere color filter 21.Said color filter 21 is by 10 controls of color filter travel mechanism, and the duty of this color filter travel mechanism 10 is operated by automatic reset circuit 8 by the control signal (B) of control panel 6 outputs.
The vision signal of optic probe 1 output, image pick-up card 5 is directly given in the single channel monitoring; The multichannel monitoring, then the vision signal of each road optic probe output must be given image pick-up card 5 through oversampling circuit switch 4 earlier again.This image pick-up card 5 is selected VFG8BC type finished product for use, directly inserts in the spare extension groove in the microcomputer 7.Vision signal deposits among the DRAM after image pick-up card 5 digitizings, and simultaneously, capture card is converted to vision signal to the digital picture among the DRAM again and transports to microcomputer 7 screens formation visible image.After the picture of taking in became digital signal by vision signal, the monochrome information of picture correspondingly was converted to the gray value information of image.The image real time scan that deposits in by microcomputer 7 inside is distinguished and is read software, each gray values of pixel points of composing images constantly scanned distinguish and read, and will read gray-scale value make comparisons with the flame discrimination threshold that is arranged in the software, judge that with this not flame appearance is arranged in optic probe 1 monitoring range, realize real-time monitoring flame.General black and white camera picture, its pixel gray-scale value is divided into 256 grades.Because of also there being a small amount of infrared radiation in the background, for improving the accuracy that flame is differentiated, suitable flame discrimination threshold is set in software, make monitoring system only to the ultraviolet in the flame, infrared-sensitive.Through experimental debugging, the flame discrimination threshold in the software is fit to be advisable between the about 140-210 level of gray-scale value.For further discerning is flame or fire, and according to the notable feature that incipient fire takes place, the geometrical body of its flame picture is understood along with the time is constantly developed expansion on visual effect, and the flame of other non-fire does not possess this feature.Therefore, read that a part image value meets or exceeds the flame discrimination threshold on the picture in case scanning is distinguished, then showing in probe monitoring place has flame to occur, and writes down the area of this position image.Then, continue the image that the back is taken in is scanned, distinguish and read the same area imagery coverage that the area that front and back are write down compares, and draws the rate of growth of area.If this area is in development, its Area Growth rate promptly is identified as fire for just, distinguishes that reading software sends control signal (E) by control panel 6, makes alarm 3 send audible alarm, simultaneously, and the time that the flicker fire takes place on the screen.If the Area Growth rate then is identified as non-fire disaster flame for negative.During the multichannel monitoring, when sending fire alarm, software also sends locking signal (A) by control panel 6, and control circuit switch 4 makes it to be fixed on the pick-up lens of finding fire.In addition, when having fire to occur, software also sends signal (B) by control panel 6, starts automatic reset circuit 8, drives 10 actions of color filter travel mechanism, removes the visible filter 21 before the pick-up lens 11 automatically.At this moment, optic probe 1 promptly becomes common camera function: visual image is presented on the screen, indicates the concrete position that fire takes place simultaneously.Color filter 21 before the pick-up lens 11 has two kinds of control modes, i.e. manual intervention and software control.When the present invention carried out the monitoring task usually, color filter 21 was in pick-up lens 11 fronts all the time, took in ultraviolet, infrared information in the monitoring place.Before the people appears at screen, when needing the situation in observation post monitoring place, can remove color filter 21 by the manual intervention key that is provided with on microcomputer 7 keyboards, just show visual image on the screen.At this moment, the software function in the microcomputer 7 lost efficacy, and being observed and discerned by the people fully has the not condition of a fire in the monitor visual field.Very important person one frames out, and button resets, and color filter 21 is automatically reset before pick-up lens 11, and monitoring of software comes into force.If breaking out of fire is reported to the police, by above-mentioned, remove color filter 21 automatically by software control, the scene of fire visual image that screen display is ingested is used for observation and video recording.On addressed set software and produced a plurality of control signals (A-H) by control panel 6, control alarm 3 respectively, automatic reset circuit 8, cradle head control device 9 and circuit switch 4, make the present invention accurately, in order, do not have the ground of omission and carry out the fire monitoring task.
Fig. 2 is color filter travel mechanism 10 synoptic diagram.This travel mechanism and pick-up lens 11 are installed together, and are being with the interlock rotation by The Cloud Terrace 12.Pick-up lens 11 can be embedded on the fixing chute 22, also can keep certain distance with camera aperture on the chute 22.Color filter 21 is embedded in slidably on the slide block 20, and this slide block 20 can move in chute 22.When carrying out the fire disaster real-time monitoring, after direct current generator 14 is started by software control, drive crank 17 by reduction gearing 16 and rotate, this crank 17 links to each other with slide block 20 by connecting rod 18 again, and connecting rod 18 drives slide block 20 and moves in chute 22.Radially bound bit switch (15,19) is housed two ends in reduction gearing 16.When crank 17 touches lower position switch 19, motor 14 stalls, the color filter 21 in the slide block 20 moves to pick-up lens 11 positions just at this moment, covers pick-up lens 11, and the realization fire safety evaluating is monitored in real time.As manual intervention or when sending fire alarm signal, send signal (B) by software by control panel 6, make direct current generator 14 counter-rotatings, by crank 17 and connecting link 18 slide block 20 is oppositely moved.When crank 19 touches upper limit position switch 15, motor 14 stalls, at this moment, color filter 21 leaves pick-up lens 11 fully, realizes the visual image monitoring.
Fig. 3 is control panel 6 synoptic diagram.This plate is inserted in the spare extension groove of microcomputer 7, is made up of code translator 23 and latch 24, and links to each other with microcomputer 7 with number bus by address bus.Here select microcomputer 7(286 or 386) C000H output port control.Code translator 23 signal that the address bus of microcomputer 7 is next is deciphered, if C000H is a selected signal, deliver to the signal latch of latch 24, form control panel 6 output port A-H various control signals, control foregoing each execution unit respectively data bus.
Fig. 4 is automatic reset circuit 8 synoptic diagram.The control signal of being sent here by control panel 6 (B) makes the action of switch AN, motor 14 is powered up make it running.This signal (B) can perhaps carry out manually-operated by microcomputer 7 keyboards by fire alarm signal by the automatic trigger action of software.When being in the fire monitoring state, AN is at " 1 " position, lower position switch 19(AN
1) at " 2 " position, upper limit position switch 15(AN
2) in " 1 " position, this moment, color filter 21 overlapped with pick-up lens 11, optic probe 1 mainly responds to ultraviolet, infrared scenery.As fire alarm or when manual intervention is arranged, and control panel 6 output signals (B, switch AN action are transformed into " 2 " position by " 1 ", power connection, and motor 14 starts, and drives slide blocks 20 by crank 17 and connecting rod 18 and moves, and makes color filter 21 leave pick-up lens 11.After motor 14 starts, lower position switch 19(AN
1) get back to " 1 " position by " 2 ".Before alerting signal or manually-operated signal (B) elimination, switch AN rests on " 2 " position all the time, so motor 14 is rotated further, slide block 20 is being with color filter 21 to continue to move, and hits upper limit switch 15(AN up to crank 17
2), make AN
2Change to " 2 " position by " 1 " position, dump, motor 14 stalls, relay J adhesive simultaneously, contact J
-1Self-locking, J
-2And J
-3Go to " 2 " position by " 1 " position.After the signal (B) of control panel 6 was eliminated, AN replied " 1 " position by " 2 " position again, the power supply commutation, and motor 14 counter-rotatings, slide block 20 is done oppositely to move.At this moment, upper limit position switch 15(AN
2Though) get back to " 1 " position by " 2 ", because contact J
-1Self-locking action, motor 14 continues counter-rotating, hits lower position switch 19(AN until crank
1), make it get back to " 2 " position by " 1 " position, cut off the electricity supply, motor 14 stalls, relay J discharges and resets.
The real time scan that Fig. 5 adopts for the present invention is distinguished and is read and the alarm software process flow diagram.This software has been stored in the microcomputer 7 before system works, and microcomputer 7 selects for use common 286 or 386 type PCs to get final product.
The effect of software:
1. constantly scan and distinguish and read taking in each pixel gray-scale value of image; 2. be provided with the flame discrimination threshold in the software, can determine by field adjustable, generally at the 140-210 inter-stage; 3. pixel gray-scale value and flame discrimination threshold are compared; 4. the image of flames area of taking in is successively made comparisons, rate of growth is for just, and promptly differentiating is fire; 5. fire occurs and send alerting signal, and the fire time of origin that on screen, glimmers; 6. controls lens is done fire monitoring, still is the visualizing monitor state; 7. fire appears, control circuit switch duty; 8. control The Cloud Terrace rotation status is done comprehensive monitoring.
Claims (5)
1, fire alarm with image distinguish function, it is characterized in that comprising at least cover (road) optic probe [1] and probe control circuit [2], the signal of optic probe [1] output is fed directly or through circuit switch [4], and image pick-up card [5] is laggard goes in the microcomputer [7], give control panel [6] after the data of being gathered are handled, this control panel [6] can be exported a plurality of control signals, respectively control circuit switch [4], alarm [3] and probe control circuit [2].
2, monitor alarm for fire accident according to claim 1, it is characterized in that said optic probe [1] comprises pick-up lens [11], drive the The Cloud Terrace [12] of rotation of lens, camera lens monitor [13], configuration color filter [21] and color filter travel mechanism [10] before the camera lens, this color filter travel mechanism [10] and pick-up lens [11] interlock.
3, monitor alarm for fire accident as claimed in claim 1 or 2 is characterized in that said probe control circuit [2], comprises that automatic reset circuit [8] is control color filter travel mechanism [10] action, and cradle head control device [9] is to handle The Cloud Terrace [12] rotation status.
4, as monitor alarm for fire accident as described in the claim 2, it is characterized in that said color filter travel mechanism [10], driving crank [17] by motor [14] by reduction gearing [16] rotates, crank [17] drives slide block [20] by connecting rod [18] and moves in chute [22], said pick-up lens [11] can be embedded on the chute [22], said color filter [21] is embedded on the slide block [20], radially upper limit position switch AN is set two ends respectively in reduction gearing [16]
1[15] and lower position switch AN
2[19].
5, as monitor alarm for fire accident as described in the claim 3, it is characterized in that said color filter travel mechanism [10], driving crank [17] by motor [14] by reduction gearing [16] rotates, crank [17] drives slide block [20] by connecting rod [18] and moves in chute [22], said pick-up lens [11] can be embedded on the chute [22], said color filter [21] is embedded on the slide block [20], radially upper limit position switch AN is set two ends respectively in reduction gearing [16]
1[15] and lower position switch AN
2[19].
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN93114042A CN1044524C (en) | 1993-11-05 | 1993-11-05 | Fire alarm with image distinguish function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN93114042A CN1044524C (en) | 1993-11-05 | 1993-11-05 | Fire alarm with image distinguish function |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1089741A true CN1089741A (en) | 1994-07-20 |
| CN1044524C CN1044524C (en) | 1999-08-04 |
Family
ID=4990358
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN93114042A Expired - Fee Related CN1044524C (en) | 1993-11-05 | 1993-11-05 | Fire alarm with image distinguish function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1044524C (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102110342A (en) * | 2009-12-24 | 2011-06-29 | 中国航天科工集团第三研究院第八三五八研究所 | Fire detection method and device for realizing same |
| CN105892310A (en) * | 2014-09-17 | 2016-08-24 | 北京高尔智达科技有限公司 | Linked control method for holder and multiple devices |
| CN106934980A (en) * | 2017-05-10 | 2017-07-07 | 南京三宝弘正视觉科技有限公司 | Method for safety monitoring and alarm method |
| CN108761436A (en) * | 2018-08-27 | 2018-11-06 | 上海岗消网络科技有限公司 | A kind of flame visual token device and method |
| CN113450530A (en) * | 2021-06-03 | 2021-09-28 | 河北华电石家庄热电有限公司 | Safety early warning system based on intelligent video analysis algorithm |
| CN114066892A (en) * | 2022-01-17 | 2022-02-18 | 深圳市明源云科技有限公司 | Potential safety hazard detection method and device, electronic equipment and readable storage medium |
| CN117451175A (en) * | 2023-09-18 | 2024-01-26 | 南京审计大学 | Software definition-based precise intelligent camera for detecting flame images with same view field and three wavelengths and flame image detection method |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1943824B (en) * | 2006-09-08 | 2010-06-16 | 浙江工业大学 | An automatic fire fighting unit based on omnibearing visual sensor |
| CN101020104B (en) * | 2007-03-27 | 2011-01-19 | 南京大学 | Embedded forest fire early-warning system based on video detection |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86106890B (en) * | 1986-10-29 | 1988-08-24 | 华北光电技术研究所 | All-direction ultrared warner |
| DE69030063T2 (en) * | 1989-12-11 | 1997-07-10 | Canon Kk | Battery residual charge determination arrangement |
| JPH04241094A (en) * | 1991-01-25 | 1992-08-28 | Takeshi Ikeda | Fire detector |
-
1993
- 1993-11-05 CN CN93114042A patent/CN1044524C/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102110342A (en) * | 2009-12-24 | 2011-06-29 | 中国航天科工集团第三研究院第八三五八研究所 | Fire detection method and device for realizing same |
| CN102110342B (en) * | 2009-12-24 | 2014-04-16 | 中国航天科工集团第三研究院第八三五八研究所 | Fire detection method and device for realizing same |
| CN105892310A (en) * | 2014-09-17 | 2016-08-24 | 北京高尔智达科技有限公司 | Linked control method for holder and multiple devices |
| CN106934980A (en) * | 2017-05-10 | 2017-07-07 | 南京三宝弘正视觉科技有限公司 | Method for safety monitoring and alarm method |
| CN108761436A (en) * | 2018-08-27 | 2018-11-06 | 上海岗消网络科技有限公司 | A kind of flame visual token device and method |
| CN108761436B (en) * | 2018-08-27 | 2023-07-25 | 上海岗消网络科技有限公司 | Flame vision distance measuring device and method |
| CN113450530A (en) * | 2021-06-03 | 2021-09-28 | 河北华电石家庄热电有限公司 | Safety early warning system based on intelligent video analysis algorithm |
| CN114066892A (en) * | 2022-01-17 | 2022-02-18 | 深圳市明源云科技有限公司 | Potential safety hazard detection method and device, electronic equipment and readable storage medium |
| CN117451175A (en) * | 2023-09-18 | 2024-01-26 | 南京审计大学 | Software definition-based precise intelligent camera for detecting flame images with same view field and three wavelengths and flame image detection method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1044524C (en) | 1999-08-04 |
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