CN1233149C - Image processing method for processing image of plug in type stove camera - Google Patents

Abstract

The present invention provides an image processing method for processing images of a plug-in type furnace camera, particularly an in-furnace monitoring method for monitoring the working conditions of a material surface in a furnace during the smelting process of an ironmaking blast furnace, processing an image by using a computer to quantitatively describe the distribution conditions of a material surface airflow and a temperature and monitoring the working conditions of a chute or a clock, the material flowing conditions during material loading and the abnormal furnace conditions of pipes, material collapse, etc. occurring in the furnace. The camera is mainly composed of a main camera body, a video recorder (23), a monitor (24), a digital thermometer (25), a computer (26) and a color monitor (27). The present invention uses a miniature camera without a moving part to obtain an infrared image in the furnace, uses the computer to process the image, and has the advantages of small device size, low manufacturing cost, convenient installation, simple maintenance and long service life.

Description

A kind of image to plug-in kiln video camera carries out image processing method

Technical field

The invention belongs to the process monitoring and the control technology field of industrial furnace, particularly provide a kind of image to carry out image processing method plug-in kiln video camera.Be the division of 02121548.0 " a kind of plug-in kiln video camera and image processing method " to be tried according to auditor's suggestion.

Background technology

The early 1990s, researched and developed " temp pick-up camera of material top surface in top of blast furnace " (patent of invention both at home and abroad in succession, the patent No. 90102986) and " monitoring camera " (patent of invention, the patent No. 94115659), also have a kind of heat picture instrument to adopt the mechanical scanning method to obtain the image that charge level temperature distributes, the Temperature Distribution that is used to observe the charge level situation and analyzes charge level is used to instruct blast furnace operating, has strided forward major step for opening blast furnace flight data recorder situation.Be subject at that time technical merit and condition, the gamma camera body is big, cost an arm and a leg, and gamma camera is installed in the furnace shell outside, and inspection hole is very big, move and protector is complicated, the scanning means life-span short, and the protective gas consumption is big, produce the maintenance cost height.Camera lens and form are tied the never solution of grey problem in the blast furnace use, complicated form valve and mechanical focusing device often break down, in blast furnace production process, can not safeguard and overhaul, could handle in the time of can only waiting for damping down, thereby do not applied.

Summary of the invention

The objective of the invention is to: a kind of image to plug-in kiln video camera carries out image processing method, particularly monitor in the blast furnace smelting process charge level working condition in the stove, with computer to monitoring method in the stove of the working of a furnace unusually such as the pipeline that takes place in the distribution situation of image processing quantitative description charge level air-flow and temperature, the working condition that monitors chute or great bell and when filling with substance materials flow situation, the monitoring stove and the material that collapses.

Plug-in kiln video camera used in the present invention is the pick-up camera of patent application 02121548.0, and its formation is made of pick-up camera body, video tape recorder 23, monitor 24, digital thermometer 25, computer 26 and colour picture monitor 27; The pick-up camera body is made of camera gun 16, chimney cooler 9, sealing device 15, peep-hole 21, purging ring 22, temperature element 20, gamma camera 19.Gamma camera 19 is contained in the front end of camera gun 16, inserts in the stove by the chimney cooler 9 that is installed on the furnace shell flange short tube 4, and the assurance gamma camera is being worked below 50 ℃, and the diameter range of chimney cooler 9 is 60～200mm, and length range is 200～3000mm; The mode that adopts wind and peep-hole in the peep-hole 21 to purge the protection of wind dual gas outward makes long-term continuous operation under the mal-condition of gamma camera high temperature, high pressure, high dust, the high humility in blast furnace of inserting furnace shell inside, peep-hole 21 apertures are Φ 3～Φ 15mm, are 0.2～3.0mm by the width that purges the purging annular space 28 that forms between ring 22 and the gamma camera 19; Adopt valve 13 and sealing shroud 15 double sealing structures, make pick-up camera repair and maintenance aborning.The miniature gamma camera of pick-up camera adopts the wide CCD chip of sensitive volume, when blast furnace is produced in the stove under the condition of no visible light, the CCD chip can receive the Infrared that furnace charge sends at certain temperature range, be converted into the infrared imagery of interior charge level of stove and equipment, with computer this image is carried out image processing again, obtain the quantitative data of distribution of charge level air-flow and Temperature Distribution.Pick-up camera adopts the pin hole wide-angle lens, its visual angle is 90～120 ° of working conditions that only just can observe equipment such as whole charge level and chute or great bell with a gamma camera, equipment investment and operating cost have been reduced, a difficult problem synthetic to two imperfect images of different angles when having avoided with two gamma cameras is for advantage has been created in the charge level image processing.

Adopt the mechanical scanning method that the temperature of every bit on the charge level in the stove is measured with existing heat picture instrument, and then the method difference of the temperature profile of synthetic whole charge level, the present invention obtains the infrared imagery of whole charge level simultaneously with gamma camera, with computer infrared imagery is carried out image processing again, according to the dependency relation between the temperature of infrared light intensity and testee, the gray value of each point on the image is converted into temperature value, on colour picture monitor, shows the temperature of charge level or the distribution situation of air-flow with forms such as pcolor, numerical value figure, curve charts.

The invention has the advantages that: adopt the miniature gamma camera that does not have moving component to obtain the interior infrared imagery of stove, and it is carried out image processing with computer; The device body is little, cost is low, easy for installation, safeguard simple, the life-span is long; the peep-hole aperture is little, the purging annular space is narrow, protection effect good, the protective gas consumption is few, cost of use is low; various industrial furnaces be can be used for, the no bell formula of various volumes or the blast furnace of two bell formulas are specially adapted to.

Description of drawings

Fig. 1 is a kind of general illustration of the present invention.Wherein blast furnace 1, chute 2, charge level 3, flange short tube 4, sealing gasket 5, bolt 6, packing ring 7, nut 8, chimney cooler 9, valve 10, discharge outlet 11, valve 12, valve 13 takes over 14, sealing shroud 15, camera gun 16, valve 17, wiring cap 18, gamma camera 19, temperature element 20, peep-hole 21 purges ring 22, video tape recorder 23, monitor 24, digital thermometer 25, computer 26 and colour picture monitor 27, purging annular space 28.

Fig. 2 is a pick-up camera main body structure schematic diagram of the present invention.

Embodiment

At the suitable position perforate of blast furnace 1 furnace roof furnace shell, welded flange short tube 4.Chimney cooler 9 inserts in the stove by sealing gasket 5 and flange short tube 4, installs cooler fastening and the assurance sealing with bolt 6, packing ring 7 and nut 8.Supply water to chimney cooler 9 from valve 10, water is discharged from discharge outlet 11, guarantees cooling effect.In blast furnace, feed protection gas (nitrogen or purified gas) from valve 12, purge continuously by the 28 pairs of peep-holes 21 of purging annular space that purge between ring 22 and the gamma camera 19.Camera gun 16 front ends are installed special-purpose gamma camera 19 and temperature element 20; be inserted into the cooler front end by sealing shroud 15, adapter 14 and valve 13; protection gas (nitrogen or purified gas) feeds from valve 17 and videotapes in the gun barrel; be blown in the stove from the peep-hole 21 of gamma camera front end; guarantee that camera lens and furnace gas isolate, make continuous operation for a long time under the mal-condition of gamma camera high temperature, high pressure, high dust, high humility in blast furnace.Because camera gun 16 is by sealing shroud 15 and valve 13 two seals, camera gun 16 can be extracted valve 13 in blast furnace production process closes it when above, again camera gun 16, gamma camera 19 and temperature element 20 are extracted out from sealing shroud 15, carried out maintenance and maintenance.Because adopt wide sensitive volume CCD chip, under the condition of no visible light, the CCD chip can receive furnace charge in the Infrared that certain temperature range sends in State of Blast Furnace, be converted into the infrared imagery of the interior equipment of stove such as charge level 3 and chute 2 in the stove.Because the camera watch lens visual angle reaches 90～120 °, only just can observe the working condition of whole charge level 3 and equipment such as chute 2 and the interior stock rod of stove, for advantage has been created in the charge level image processing with a pick-up camera.The vision signal of gamma camera and the signal of temperature element are drawn from the wiring cap 18 of sealing, deliver to night shift room by private cable, receive video tape recorder 23, monitor 24, digital thermometer 25, operating personnel are seen in real time and note in the stove working condition of equipment in the stoves such as charge level 3 and chute 2, understand its working condition by the working temperature of gamma camera 19.Vision signal inserts computer 26 simultaneously and carries out image processing, and the air-flow distribution of charge level and the quantitative data of Temperature Distribution are presented on the colour picture monitor 27 with forms such as pcolor, numerical value figure, distribution curves, is used to instruct blast furnace operating.

Claims (1)

1, a kind of image to plug-in kiln video camera carries out image processing method, it is characterized in that: image processing system is made of pick-up camera body, computer (26) and colour picture monitor (27), the miniature gamma camera of pick-up camera adopts the wide CCD chip of sensitive volume, when blast furnace is produced in the stove under the condition of no visible light, the CCD chip can receive the Infrared that furnace charge sends, be converted into the infrared imagery of interior charge level of stove and equipment, with computer this image is carried out image processing again, obtain the quantitative data of distribution of charge level air-flow and Temperature Distribution; According to the dependency relation between the temperature of infrared light intensity and testee, the gray value of each point on the image is converted into temperature value, on colour picture monitor, show the temperature of charge level or the distribution situation of air-flow with pcolor, numerical value figure, curve chart form.

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