CN203489237U - Embedded type flame monitoring and combusting diagnosis system - Google Patents
Embedded type flame monitoring and combusting diagnosis system Download PDFInfo
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- CN203489237U CN203489237U CN201320421167.6U CN201320421167U CN203489237U CN 203489237 U CN203489237 U CN 203489237U CN 201320421167 U CN201320421167 U CN 201320421167U CN 203489237 U CN203489237 U CN 203489237U
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Abstract
The utility model discloses an embedded type flame monitoring and combusting diagnosis system, comprising an industrial control plate, where an OMAP3530 dual-core processor, an image acquisition module, a DSP image processing module and an ARM diagnosis module are disposed. The image acquisition module is connected to the DSP image processing module, which conducts information interaction with the ARM diagnosis module. The embedded type flame monitoring and combusting diagnosis system also comprises a remote control PC machine, which is used for displaying images of the diagnosis system in a real time, facilitating the checking of workers. The ARM diagnosis module is transmitted to the remote control PC machine through an ethernet interface. Each hearth is provided with one monitoring and diagnosis system, the image of which can be displayed through transmitting to the remote control PC machine by means of the Ethernet. Accordingly, real-time requirement can be met, monitoring is facilitated, and cost is low.
Description
Technical field
The utility model belongs to photoelectric field, is specifically related to embedded flame monitoring and Combustion Diagnosis System.
Background technology
Combustion process in power plant boiler burner hearth is complicated physics and chemistry process, and the temperature field of flame distributes and fired state has extremely important realistic meaning for the safety and economic operation of station boiler and the discharge of minimizing pollutant.
For coal-burning boiler, the tissue of Combustion Operation of Boilers and monitoring have larger impact to power plant's reliability of operation, security and economy.The stability of burning is depended in the safe operation of boiler to a great extent, and the basic demand of boiler combustion is in burner hearth, to set up and maintain stable, uniform combustion flame.Combustion flame is to characterize fired state whether to stablize the most directly reflection.Burning is adjusted bad or combustion instability and can be caused boiler thermal output to decline, and produces more pollutant, noise etc., may cause boiler furnace fire extinguishing under extreme case, even brings out furnace explosion and causes the accident.In order to prevent potential danger, must carry out effective combustion diagnosis and flame monitoring.
Therefore, safe and reliable combustion diagnosis technology becomes essential condition and the basic demand of safe operation of the boiler.For large medium-size boiler, be equipped with hearth safety monitoring device, its most important part is flame safety monitoring system.
After the nineties, along with the development of computer graphics disposal technology, based on industrial charge coupled device ccd and computer graphical, processing the technology combining is one of research direction comparatively popular in furnace flame monitoring system.The hardware of boiler monitoring system generally adopts image pick-up card to add the structure of computer at present, and this system mainly lays particular emphasis on reliability, the security that improves boiler flame monitoring with the design of software aspect, but this system architecture exists significant limitation:
1) what image processing process was faced is a large amount of data processings and complicated algorithm realization, and all-purpose computer completes these tasks, and real-time cannot be guaranteed, and causes a large amount of useful datas to be effectively utilized.
2) over-burden for computer, PC will bear all work and other data read, storage operation, if the result of operation also will complete Internet Transmission and database operation, the speed of service of system is had a strong impact on, and this system is installed inconvenience at the scene.
Thermal-flame temperature field is the very important thermal parameter of combustion process, and at present the main optical radiation high temperature thermometer that adopts is measured, and the measurement that this measuring method can only burner hearth partial points cannot realize the measurement in temperature field.How to realize the processing of flame image and the calculating in temperature field real-time and further carry out combustion diagnosis and become problem demanding prompt solution.
Summary of the invention
In order to overcome the shortcoming of above-mentioned existing flame monitoring and diagnostic system, the purpose of this utility model has been to provide the mode being solved by hardware completely, such detection and diagnosis system is installed on each burner hearth, by Ethernet, be transferred on long-range PC and show, can reach the requirement of real-time, monitoring is convenient and cost is lower.
For achieving the above object, the technical solution of the utility model is as follows:
Embedded flame monitoring and Combustion Diagnosis System, comprising:
One industrial control board, is provided with OMAP3530 dual core processor in described industry control, image capture module, and DSP image processing module and ARM diagnostic module,
Described image capture module is connecting DSP image processing module, between DSP image processing module and ARM diagnostic module, carries out information interaction,
One remote machine PC, described remote machine PC is used for carrying out real-time demonstration diagnostic system picture, facilitates checking of staff;
Described ARM diagnostic module is transferred on long-range PC by Ethernet interface.
Preferably, described image capture module is a digital camera, gather the image information of furnace flame, on digital camera, be coated with internal and external casing, one cooling air import is set on internal and external casing, camera lens at described digital camera arranges a cooling air outlet next time, and described cooling air import and cooling air outlet form an air channel passage.
By technique scheme, the beneficial effects of the utility model are:
This monitoring system adopts OMAP3530 dual core processor, not only make the real-time of data-handling capacity and system significantly be promoted, but also alleviated the burden of PC, also strengthened the reliability of system simultaneously, and with ARM, the flame of boiler is diagnosed, the image that native system has IMAQ, image processing, combustion diagnosis, warning output, occur accident is recollected, self study and store various combustion failure information and realize the function of the accurate judgement of fault by algorithm for pattern recognition;
Such detection and diagnosis system is installed on each burner hearth, by Ethernet, is transferred on long-range PC and is shown, can reach the requirement of real-time, monitoring is convenient and cost is lower.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only embodiment more of the present utility model, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Accompanying drawing 1 is general frame of the present utility model.
Accompanying drawing 2 is circuit board functional block diagram of the present utility model.
The specific embodiment
For technological means, creation characteristic that the utility model is realized, reach object and effect is easy to understand, below in conjunction with concrete diagram, further set forth the utility model.
See figures.1.and.2, whole system is comprised of following part, boiler furnace, optical system, the circuit board based on OMAP3530 and long-range PC.
Boiler furnace is for carrying out the object of flame monitoring and diagnosis.
Optical system, as an accessory system, is applied to digital camera, and accessory system has referred to the cooling of optical system and purged the device of function.
The cooling employing internal and external casing of optical system is air-cooled mode directly.Cooling air enters the optics in the inside and outside direct cooling inner tube of chuck by airduct.Because the blast of instrument use gas is not high enough, for improving cooling effect, adopt independent cooling blower, the cooling blower effect that power is 18.5kW is fine.
Cooling air is blown into burner hearth through the outer tube outlet of object lens front end, purges cover glass to keep it clean simultaneously.In addition, thereby purging wind forms one deck air curtain through sweeping wind pipe guiding below object lens, effectively prevented flue dust shock object lens or sticked on object lens, having guaranteed the quality of optical system imaging.
Cooling air enters the cooling air import of inside and outside chuck through airduct, after inside and outside chuck, cooling air is discharged through cooling air outlet.
Monitoring system integrates digital camera, ARM diagnostic module, DSP image processing module and Ethernet interface etc., and take wince as operating system, digital camera adopts feature richness, the high performance COMS sensor with 300,000 pixels, have resistance toly burn, working stability is reliable, image definition advantages of higher, is used for obtaining the image of boiler flame burning.
OAMP3530 is based on ARM+DSP Duo-Core Architecture processor and inner integrated wince operating system.
DSP image processing module mainly completes the processing of flame image and the extraction of characteristic quantity.ARM diagnostic module completes the work such as combustion diagnosis.
High-speed and the concurrency that makes full use of DSP, not only makes the real-time of data-handling capacity and system significantly be promoted, and has also strengthened the reliability of system simultaneously, adopts ARM diagnostic module to diagnose, and to user, has brought facility.Ethernet is the interface that subsystem and PC communicate, and by network, by diagnostic result, the information of diagnosis, the image of Real-time Collection and fault picture upload in PC, for user, monitors.
Long-range PC is used for carrying out real-time demonstration, facilitates checking of staff.
Whole monitoring system all concentrates on take on the industrial control board that OMAP3530 is core, comprise image capture module, DSP image processing module and ARM diagnostic module, described image capture module is connecting DSP module, between DSP and ARM, carry out alternately, ARM diagnostic module is to be started by the plate program of carrying.
Described image capture module is digital camera, gathers the image information of furnace flame.
Described DSP image processing module is that the flame image to collecting carries out the operations such as pretreatment, feature extraction, by ARM diagnostic module, reads result.
Described ARM diagnostic module is that hearth combustion situation is carried out to fault diagnosis, and can carry out failed storage, and is transferred on long-range PC by Ethernet interface.
According to said method flow process, concrete implementation method is as follows;
1, digital camera
The general simulation camera that adopts carries out the collection of image, and the vision signal that simulation camera captures must convert analog signal to figure pattern through specific capure card, and just can be transformed on computer and use after being compressed.Digital camera can directly catch image, is then directly sent in processor and processes.
The utility model is that digital camera is integrated on OMAP3530 industrial control board.
, IMAQ and processing
Digital camera is with the speed acquisition flame image of 15 frames per second, and be converted into vision signal, through DSP image processing module, obtain the realtime graphic information of boiler flame, carry out Digital Image Processing work, the gray value of reading images, and carry out filtering, except processing such as noises, edge detection, image feature amount extraction.
1) average gray
Average gray is defined as the ratio of number of greyscale levels in the mathematic expectaion of gray scale and image, its reflection be the average intensity of Fire Radiation.In image processing process, getting a threshold value is
, establish
be
the probability of level gray scale, wherein
,
maximum for gradation of image.
the average gray of representative image, has:
In formula
actual maximum gray scale number for image.
2) variance
Variance has reflected the degree of irregularity of Flame Temperature Distribution, and variance is larger, represents that the temperature difference in the spatial dimension of temperature field is larger.When stove chamber inner combustion is during in underrun, minimizing due to Coal-fired capacity, burning thermal discharge reduces thereupon, therefore furnace flame temperature and water-cooling wall surface temperature decline, thereby reduction combustion velocity, the heat release speed that slows down postpones to some extent catching fire of breeze airflow in high load capacity situation.And cause on combustion flame center and rise, the combustion share of coal dust changes in spatial dimension, so the distribution spatially of the temperature field in stove is than more even in high load capacity situation.Therefore in high load capacity situation than underload situation under the inhomogeneous degree of the spatial distribution level of temperature field in furnace large.
According to probability theory knowledge, can obtain variance is defined as follows:
In formula
,
for height and the width (being pixel count) of image,
for
the gray value at place,
for average gray, its value is:
.
This value has reflected the degree of irregularity of Temperature Distribution, and variance is larger, represents that the temperature difference in temperature field is larger.
By the current combustion case of combination judgement flame of these two amounts.If current flameholding, gray value should be in a threshold value, and variance should be more steady.If unstable combustion, has the trend of fire extinguishing, can show as: gray value declines, and gray variance changes greatly.So these two curves are most important to " having fire " whether judgement to whole system.
3) flame effective area: as the geometric feature that characterizes combustion position, existing a large amount of research in Theory of Combustion.Here applied flame effective area is corresponding to the projected area perpendicular to camera direction.By the pretreatment to raw flame image, can count the total amount of certain all picture element more than gray level in image, the area of flame occupying due to each picture element is roughly even, thereby its essence previous generation has shown the projected area size of flame.The computing formula of flame effective area is as follows:
（3）
4) high-temperature area area: from Theory of Combustion, more high combustion is more stable for ignition temperature in the situation that other conditions are certain, as long as combustion flame has more stable high-temperature area area, to resist the ability of interference just strong for flame so, burning will be stablized.And the brightness of the high-temperature area of flame variation is very little, flicker frequency is very low.So flame effective area and high-temperature area area value can reflect the stability of burning, can be as the foundation of combustion diagnosis.
, system monitoring and combustion diagnosis
The contained information content of flame image gathering is sizable, unnecessary in combustion diagnosis also can not be using so many original image informations all as the criterion of identifying.Like this, just require to extract from original image information and somely can reflect that the characteristic quantity of flame essence is as the foundation of combustion diagnosis.The combustion flame image that native system photographs station boiler extracts following characteristics amount: flame average gray and gray variance, flame effective area and area variance, high-temperature area area and area variance, react thus the combustion characteristics of flame, finally realize combustion diagnosis.
1) the real-time demonstration of image
By digital camera by burned flame real time image collection in DSP, and carry out alternately, realtime graphic being uploaded on long-range PC and being shown by Ethernet with ARM core, for user, observe combustion position.Boiler flame situation can show in real time in many ways, can on computer screen, with bar graph, show, display mode comprises demonstration, entirely shows, can show the flame situation of a plurality of boilers simultaneously.
2) memory function
ARM diagnostic module can be controlled the image that camera is obtained and store in NAND Flash, is conducive to the analysis of flame image, also can regularly store the image information of obtaining.
3) fault diagnosis
The characteristic quantity that ARM diagnostic module extracts by DSP is diagnosed, if there is fault, the one section of video image breaking down is saved in Flash, be convenient to recall at any time inspection and be beneficial to crash analysis, make this system there is the function of emergency review, and produce the output of reporting to the police, on long-range PC screen, there are warning mark and stand by lamp, so that prompting staff processes.
4) self-learning function
System has the function that various combustion failure information is stored, during by various fault, the state of image stores in Flash, adopt statistical model recognizer, various fault messages are concentrated in together, then according to feature, classify, when flame is diagnosed, the image information of obtaining and these classes are compared, if show to exist fault in this type of, realized and need not process and can accurately judge boiler flame fired state by image.
More than show and described basic principle of the present utility model and principal character and advantage of the present utility model.The technical staff of the industry should understand; the utility model is not restricted to the described embodiments; that in above-described embodiment and description, describes just illustrates principle of the present utility model; do not departing under the prerequisite of the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall within the scope of claimed the utility model.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (2)
1. embedded flame monitoring and Combustion Diagnosis System, is characterized in that, comprising:
One industrial control board, is provided with OMAP3530 dual core processor in described industry control, image capture module, and DSP image processing module and ARM diagnostic module,
Described image capture module is connecting DSP image processing module, between DSP image processing module and ARM diagnostic module, carries out information interaction,
One remote machine PC, described remote machine PC is used for carrying out real-time demonstration diagnostic system picture, facilitates checking of staff;
Described ARM diagnostic module is transferred on long-range PC by Ethernet interface.
2. embedded flame according to claim 1 is monitored and Combustion Diagnosis System, it is characterized in that: described image capture module is a digital camera, gather the image information of furnace flame, on digital camera, be coated with internal and external casing, one cooling air import is set on internal and external casing, camera lens at described digital camera arranges a cooling air outlet next time, and described cooling air import and cooling air outlet form an air channel passage.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107270284A (en) * | 2017-06-19 | 2017-10-20 | 昆明理工大学 | A kind of eddy flow chaos burner and its application process |
| CN107509050A (en) * | 2017-08-08 | 2017-12-22 | 航天长征化学工程股份有限公司 | Gasifier flame detecting system |
| CN109442474A (en) * | 2018-11-12 | 2019-03-08 | 西安艾贝尔科技发展有限公司 | A kind of flame detection device of gasification furnace and detection method |
-
2013
- 2013-07-16 CN CN201320421167.6U patent/CN203489237U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107270284A (en) * | 2017-06-19 | 2017-10-20 | 昆明理工大学 | A kind of eddy flow chaos burner and its application process |
| CN107509050A (en) * | 2017-08-08 | 2017-12-22 | 航天长征化学工程股份有限公司 | Gasifier flame detecting system |
| CN109442474A (en) * | 2018-11-12 | 2019-03-08 | 西安艾贝尔科技发展有限公司 | A kind of flame detection device of gasification furnace and detection method |
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