CN1975392A - Flue gas discharge continuous monitoring system based on image processing - Google Patents
Flue gas discharge continuous monitoring system based on image processing Download PDFInfo
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- CN1975392A CN1975392A CN 200610130503 CN200610130503A CN1975392A CN 1975392 A CN1975392 A CN 1975392A CN 200610130503 CN200610130503 CN 200610130503 CN 200610130503 A CN200610130503 A CN 200610130503A CN 1975392 A CN1975392 A CN 1975392A
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Abstract
The invention relates to an observation system of the smoke discharging especially for the continuous observation system based on the figure treatment. The system includes the figure collection and transmitting subsystem, the CEMS management subsystem. The figure collecting management system includes the vidicon, the video optical transmitter, the video optical receiver and the video collecting card. The CEMS management subsystem includes the figure pretreatment module, the figure analyzing module and the information management module. It inspects the smoke discharging state by the non-contact video image treating method to be easy to install and maintenance. It has the low cost and strong maneuverability, function expansibility. Also it has the high sensitivity and accurate ratio. It can appraise of the smoke content and the user can select the reference region. It combines the smoke observation system and the video inspecting system and is controlled by the information management software.
Description
Technical field
The present invention relates to a kind of fume emission monitoring system, particularly a kind of flue gas discharge continuous monitoring system based on Flame Image Process.
Technical background
Existing flue gas discharge continuous monitoring system (CEMS) is mainly based on front end flue gas sensor measurement gas concentration, is that core makes up with inlet sensor equipment how, though have higher measuring accuracy, cost and equipment loss are all higher, and install, safeguard inconvenience.On function, this type systematic is only exported single measurement data, and lacks collection, demonstration and storage to smoke evacuation place visual information directly perceived, is not easy to omnibearing monitoring and management are carried out in blowdown.Some large size industrial enterprises are installed flue gas discharge continuous monitoring system and smoke evacuation place video monitoring system simultaneously, not only with high costs, and owing to be difficult to form the perfect monitoring management platform (two cover systems have front end and terminal separately) of integration, and cause overall efficacy to be not in full use.
Based on the fume emission continuous monitoring solution of Flame Image Process, only at the design of black flue gas, can't effectively detect, discern and measure red cigarette (iron content), tobacco common color flue gases such as (sulfur-bearings) individually, the scope of application is very limited.In addition,, lack self-adaptation and effectively match, thereby be difficult to avoid the wrong report that environmental factor causes and fail to report using situation and external environment condition owing to adopt default fixed threshold to carry out the fume emission condition discrimination.
Summary of the invention
In view of there are shortcomings such as cost height, easily loss, installation and maintenance inconvenience, monitoring information be limited in traditional fume emission continuous system, the present invention aims to provide a kind of convenient, efficient, multi-functional flue gas discharge continuous monitoring system based on Flame Image Process.Promptly on the hardware foundation of video monitoring system, adopt digital image processing techniques, by analyzing the video image information in smoke evacuation place, its fume emission state is carried out continuous monitoring, and realize video monitoring (real-time video demonstration, video recording and playback) simultaneously the smoke evacuation place.Flue gas monitoring and video monitoring were both combined closely on function, had unified terminal software platform again, were convenient to omnibearing control and management are carried out in the smoke evacuation place.Technically, this system makes full use of the color image information that video monitoring system is gathered on the one hand, can detection and Identification black, manifold flue gas such as redness, yellow, and respectively its concentration and emissions status are made mensuration.On the other hand,, effectively reduced environmental factor, greatly reduced the rate of false alarm and the rate of failing to report of system the influence that flue gas monitoring causes by a large amount of field experiments with at the design of the adaptive algorithm of site of deployment environmental factor.
Based on the flue gas discharge continuous monitoring system of Flame Image Process, form by image acquisition transmission subsystem (hardware) and CEMS ADMINISTRATION SUBSYSTEM (software), as shown in Figure 1.The image acquisition transmission subsystem comprises equipment such as video camera, video optical multiplexer, video frequency collection card, carries out the transmission of video information by optical fiber.The CEMS ADMINISTRATION SUBSYSTEM comprises image pre-service, graphical analysis, three modules of information management, corresponds respectively to video image and shows output, fume emission state output (discharging exceeds standard then the output of warning), historical data and video recording output in real time.
The technical scheme that the present invention takes is: a kind of flue gas discharge continuous monitoring system based on Flame Image Process, it is characterized in that, comprise image acquisition transmission subsystem and CEMS ADMINISTRATION SUBSYSTEM, described image acquisition management system comprises video camera, video light end transmitter, video light end receiver and video frequency collection card, described CEMS ADMINISTRATION SUBSYSTEM comprises the image pretreatment module, image analysis module and information management module, described video camera is transferred to video light end transmitter with video analog signal, by video light end transmitter analog signal conversion is become light signal again, and arrive video light end receiver by Optical Fiber Transmission, video light end receiver converts video analog signal to electric signal and is transferred to video frequency collection card, video frequency collection card converts video analog signal to video signal and is transferred to the image pretreatment module, the image pretreatment module is sent image information into image analysis module and is carried out analyzing and processing, simultaneously image information is delivered to the output of video display end, image analysis module is sent into information management module after the image/video digital signal is handled, export the smoke evacuation state simultaneously, at last by information management module output video data and video recording.
Take the present invention of technique scheme to have following function:
1. video monitoring function
Can to the smoke evacuation place carry out real-time video monitoring, in terminal with the real-time display video image of certain frame rate;
Can continue video recording to video source, at regular intervals with its packing storage;
Can search in chronological order and playback the Video Document of storage, playing back videos and real-time video monitoring, flue gas monitoring are independent of each other.
2. flue gas monitoring function
Can monitor in real time the flue gas in the set monitored area in the video image, the coloured smokes such as red cigarette, tobacco, black smoke of discharging be made identification respectively, and judge its concentration rank;
Can monitoring result be divided into " normal discharging "/three kinds of emissions status of " the critical discharging that exceeds standard "/" discharging exceeds standard ", and be indicated respectively according to current flue gas concentration rank and the predetermined threshold value that exceeds standard; When exceeding standard, fume emission can in the interface, make warning (also can set and play alert audio) when monitoring according to the user with the red light of flicker, and the forced-triggered video recording;
Can deposit fume emission status monitoring result in database, set up fume emission log management storehouse, can be by query history monitoring results such as time, passage, emissions status.
3. other function/performance requirement
Can carry out real-time video monitoring and flue gas monitoring to 4 passage video source simultaneously, each interchannel is independent of each other;
Can in observation process, intercept the current video two field picture at any time and deposit image data base in, press passage, sampling time and fume emission state and sort out;
Can in the monitoring picture, one or more monitored areas be set by the user, support erose regional assignment;
Can in the monitoring picture reference zone be set by the user, as normal emission standards, threshold value promptly exceeds standard with it;
Reserved the standard industry interface (4～20mA) that can be used as FEEDBACK CONTROL;
But the discharging of the white flue gas uncontaminations such as (water vapor) in the filtering applied environment is not reported to the police to it.
Superiority of the present invention and technique effect are as follows:
1. adopt contactless method of video image processing monitoring fume emission state, be convenient to installation and maintenance;
2. adopt software processes to realize the flue gas concentration monitoring, to compare cost lower with sensor-based traditional scheme, and operability, function expansibility are stronger;
3. can accurately detection and Identification white, the flue gas of multiple color such as black, redness, yellow, have higher sensitivity and accuracy rate;
4. can carry out the concentration estimation to the flue gas of being discerned, estimation concentration value and actual concentrations have positive correlation preferably;
5. can dynamically set the decision threshold of fume emission state (concentration) in view of the above by the selected reference zone of user, guarantee the robustness of monitoring system environmental change;
6. flue gas monitoring system and video monitoring system are integrated into one, video monitoring and flue gas monitoring to the smoke evacuation place are provided simultaneously, and unification is controlled by information management software.
Description of drawings
Fig. 1 is based on the flue gas discharge continuous monitoring system block diagram of Flame Image Process and as Figure of abstract.
Fig. 2 is an image analysis module process flow diagram among Fig. 1.
Fig. 3 is a CEMS ADMINISTRATION SUBSYSTEM master interface synoptic diagram among Fig. 1.
Embodiment
As shown in Figure 1, the analogue video signal of front-end camera collection reaches this locality by optical fiber communication, is converted to digital video information through video frequency collection card, i.e. digital image sequence.In the subsequent images pre-service, become the digital picture of sequence to be converted to rgb format by yuv format earlier, handle by filtering, sharpening, histogram transformation etc. are necessary again, strengthen its picture quality, and then in software interface, show in real time with certain frame rate.
Follow-up image analysis module is the core place of realizing the flue gas monitoring function, and treatment step is as follows:
1. at first obtain reference zone (being defined as 8 * 8 Pixel Dimensions) and monitored area that the user is provided with;
2. reference zone and the monitored area that is provided with according to the user made regional location and pixel extraction respectively in pretreated current frame image;
3. to each pixel in 8 * 8 reference zones, calculate colourity and saturation degree (being referred to as color characteristic), with the intermediate value of each pixel color feature color characteristic as whole reference zone according to its rgb value;
4. the monitored area is divided into 8 * 8 subregions of some, copies step 3 to calculate the color characteristic of all subregion, get the color characteristic of the average statistical of all subregion color characteristic again as the monitored area;
5. to all subregion of monitored area, calculate the measures of dispersion (i.e. distance on color wheel) between monitored area color characteristic and the reference zone color characteristic;
6. the grade of sensitivity that is provided with according to the user judges whether the measures of dispersion between monitored area color characteristic and the reference zone color characteristic surpasses threshold value; Judge promptly whether fume emission exceeds standard in the described smoke evacuation of the present image place;
7.,, and start the video recording of reporting to the police if exceed standard then further output alarm information (red light that shows flicker in the software interface is play the audio file of user preset simultaneously) if normally then export current fume emission state;
8. deposit information such as channel number, date, time, fume emission state in database, call for information management module.
In concrete enforcement, this system is used to monitor the fume emission state of steelworks, iron-smelter, coke-oven plant, discerns at coloured smokes such as red cigarette, tobacco, black smokes, and its concentration is made estimation, judges making emissions status with threshold ratio.
Claims (2)
1. flue gas discharge continuous monitoring system based on Flame Image Process, it is characterized in that, comprise image acquisition transmission subsystem and CEMS ADMINISTRATION SUBSYSTEM, described image acquisition management system comprises video camera, video light end transmitter, video light end receiver and video frequency collection card, described CEMS ADMINISTRATION SUBSYSTEM comprises the image pretreatment module, image analysis module and information management module, described video camera is transferred to video light end transmitter with video analog signal, by video light end transmitter analog signal conversion is become light signal again, and arrive video light end receiver by Optical Fiber Transmission, video light end receiver converts video analog signal to electric signal and is transferred to video frequency collection card, video frequency collection card converts video analog signal to video signal and is transferred to the image pretreatment module, the image pretreatment module is sent image information into image analysis module and is carried out analyzing and processing, simultaneously image information is delivered to the output of video display end, image analysis module is sent into information management module after the image/video digital signal is handled, export the smoke evacuation state simultaneously, at last by information management module output video data and video recording.
2. a kind of flue gas discharge continuous monitoring system based on Flame Image Process as claimed in claim 1 is characterized in that the treatment step of described image analysis module is as follows:
(1). at first obtain reference zone and monitored area that the user is provided with;
(2). make regional location and pixel extraction respectively according to reference zone and monitored area that the user is provided with;
(3). each pixel in the reference zone is calculated color characteristic according to its rgb value, with the intermediate value of each pixel color feature color characteristic as whole reference zone;
(4). the monitored area is divided into the subregion of some, copies step 3 to calculate the color characteristic of all subregion, get the color characteristic of the average statistical of all subregion color characteristic again as the monitored area;
(5). calculate the measures of dispersion between monitored area color characteristic and the reference zone color characteristic;
(6). according to the grade of sensitivity that the user is provided with, judge whether the measures of dispersion between monitored area color characteristic and the reference zone color characteristic surpasses threshold value;
(7) if. normally then export current fume emission state,, and start the video recording of reporting to the police if exceed standard then further output alarm information;
(8). deposit the fume emission status information in database, call for information management module.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2006101305036A CN100487437C (en) | 2006-12-21 | 2006-12-21 | Flue gas discharge continuous monitoring system based on image processing |
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| CNB2006101305036A CN100487437C (en) | 2006-12-21 | 2006-12-21 | Flue gas discharge continuous monitoring system based on image processing |
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| CN1975392A true CN1975392A (en) | 2007-06-06 |
| CN100487437C CN100487437C (en) | 2009-05-13 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102313511A (en) * | 2010-07-02 | 2012-01-11 | 中国商用飞机有限责任公司 | Icing detector |
| CN103794033A (en) * | 2014-02-27 | 2014-05-14 | 广州杰赛科技股份有限公司 | Monitoring alarm method and device |
| CN105872464A (en) * | 2016-04-11 | 2016-08-17 | 三峡大学 | System for automatically monitoring factory smoke emission based on video signal |
| CN107860867A (en) * | 2017-10-31 | 2018-03-30 | 合肥天鹰高科技有限公司 | A kind of Thermal generation unit on-line monitoring system of flue gas discharge |
| CN107872650A (en) * | 2017-10-31 | 2018-04-03 | 合肥天鹰高科技有限公司 | A kind of generating set flue gas on-line monitoring method |
-
2006
- 2006-12-21 CN CNB2006101305036A patent/CN100487437C/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102313511A (en) * | 2010-07-02 | 2012-01-11 | 中国商用飞机有限责任公司 | Icing detector |
| CN102313511B (en) * | 2010-07-02 | 2015-12-16 | 中国商用飞机有限责任公司 | Icing detector |
| CN103794033A (en) * | 2014-02-27 | 2014-05-14 | 广州杰赛科技股份有限公司 | Monitoring alarm method and device |
| CN103794033B (en) * | 2014-02-27 | 2017-09-22 | 广州杰赛科技股份有限公司 | Monitoring alarm method and device |
| CN105872464A (en) * | 2016-04-11 | 2016-08-17 | 三峡大学 | System for automatically monitoring factory smoke emission based on video signal |
| CN107860867A (en) * | 2017-10-31 | 2018-03-30 | 合肥天鹰高科技有限公司 | A kind of Thermal generation unit on-line monitoring system of flue gas discharge |
| CN107872650A (en) * | 2017-10-31 | 2018-04-03 | 合肥天鹰高科技有限公司 | A kind of generating set flue gas on-line monitoring method |
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| Publication number | Publication date |
|---|---|
| CN100487437C (en) | 2009-05-13 |
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