CN110426128A - A kind of photo-thermal power station heat dump external wall temperature measurement device and method - Google Patents
A kind of photo-thermal power station heat dump external wall temperature measurement device and method Download PDFInfo
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- CN110426128A CN110426128A CN201910813107.0A CN201910813107A CN110426128A CN 110426128 A CN110426128 A CN 110426128A CN 201910813107 A CN201910813107 A CN 201910813107A CN 110426128 A CN110426128 A CN 110426128A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J2005/0077—Imaging
Abstract
This application involves the tower photo-thermal power station fields in field, are related to a kind of photo-thermal power station heat dump external wall temperature measurement device and method.The present invention is the technical problem that the detection accuracy by infrared heat image instrument measuring realization surface temperature of the solution prior art is not high and Imported High-performance thermal infrared imager is expensive.A kind of measuring device is provided, which includes: that at least outside wall temperature obtaining widget all the way for capturing the corresponding thermal image of photo-thermal power station heat dump outer wall heat radiation energy forms color image video information and black white image video information；Heat sink temperature processing component, for being color image and black white image by the video information alignment processing；According to the color image and black white image, the actual temperature value of the positional value for obtaining current heat dump and the corresponding heat dump of the positional value is respectively corresponded.
Description
Technical field
Tower photo-thermal power station field this application involves field, in particular to a kind of photo-thermal power station heat dump outside
Wall temperature measurement device and method.
Background technique
In tower photo-thermal power station, need using a large amount of heliostat by sunshine heat focus on heat dump to
Collect solar energy.On different dates and periods different on the same day, the DNI of sunlight (directly radiates) energy and heliostat
Optical efficiency also all be variation, the influence of the meteorological conditions such as cloud layer, wind speed, wind direction in addition, so that heat dump load and temperature
The parameters such as degree are usually in dynamic change.
The heat dump of tower photo-thermal power station generallys use the exposed arrangement of heating surface for the radiation energy for receiving heliostat,
Radiation loss is larger, reduces radiation loss often through the mode for reducing heating surface area in design, this leads to heat dump surface
Heat flow density is high, for example fused salt heat dump surface mean heat flux reaches 600kW/ ㎡ or more, and maximum heat flow density reaches
1200kW/ ㎡ or more.This high heat flux density increases heating surface metal and meets the tube wall temperature of light side and the film temperature of working medium.Wall temperature
Increase with film temperature brings following serious problems: in terms of metal, heat dump is originally at 650 DEG C or so of high temperature refrigerant environment,
A small amount of temperature overgauge just proposes great challenge to the temperature resistant capability of metal, it is caused to be easy to appear overtemperature failure；And
In terms of working medium, the increase of working medium film temperature is for fused salt working medium heat dump, first is that fused salt is to metal material after temperature raising
Corrosivity is consequently increased, second is that salt chlorinator temperature, which is increased to, gasification, denaturalization phenomenon will occurs more than after its decomposition temperature, it also will be tight
Fused salt cooling capacity is reduced again, can also aggravate heat dump metal overtemperature degree in turn.
In view of the above problems, the mode for generalling use infrared heat image instrument measuring heat dump infrared emission image at present is realized pair
The detection of surface temperature.By common allocation plan, a heat dump needs to configure 8 high-precision thermal infrared imagers, infrared heat
High to the required precision of heat dump surface temperature measurement as far measuring distance between instrument and heat dump heating surface, this high-performance is infrared
Thermal imaging system is all import high-end product at present, price and its high, and requirement of the equipment to use environment is high, measurement accuracy and
The reliability of measurement is all affected by environment big.
Summary of the invention
The application provides a kind of photo-thermal power station heat dump external wall temperature measurement device and method, to solve passing through for the prior art
Infrared heat image instrument measuring realizes the not high technical problem and Imported High-performance thermal infrared imager valence of the detection accuracy of surface temperature
The cost problem of lattice valuableness.
Embodiments herein is accomplished in that
A kind of photo-thermal power station heat dump external wall temperature measurement device includes: at least outside wall temperature obtaining widget all the way, for catching
The corresponding thermal image of photo-thermal power station heat dump outer wall radiant heat energy is obtained, and forms color image video information and black white image video
Information；And heat sink temperature processing component, for the color image video information and black white image video information is corresponding
Processing is color image and black white image；According to the color image and black white image, respectively correspond to obtain current heat dump
The actual temperature value of positional value and the corresponding heat dump of the positional value.The utility model has the advantages that by obtaining photo-thermal power station outer wall with for the moment
The corresponding thermal image of heat radiation energy is carved, the repeatability of black white image and color image, is worked as after data conversion treatment
The corresponding tube panel each position temperature of preceding device.This method can effectively shielding environment condition to the shadow of measurement accuracy and Measurement reliability
It rings, while can greatly reduce the cost input of measuring device.
Further, the outside wall temperature information acquisition section includes: imaging and light-dividing device, for capturing photo-thermal power station
The corresponding thermal image of heat dump outer wall radiant heat energy, and it is divided into three road thermal images；And image collecting device, for capturing
The same three road thermal image of range of synchronization forms color video information and two-way black and white video information all the way.The utility model has the advantages that same
One moment optically isolated two-way black white image and all the way color image from same target radiant image, and passed through
Image collecting device obtains vision signal, provides accurate data source for follow-up data processing.
Further, the heat sink temperature processing component includes:
Image pick-up card, for respectively corresponding the color video information and two-way black and white video information processing to correspond to
Image information；And
Temperature value processing unit, for being handled by dual wavelength temp measuring method according to the color image and black white image
Obtain the positional value of current heat dump and the actual temperature value of the corresponding heat dump of the positional value.The utility model has the advantages that passing through double-colored ratio
Thermometry handles two-way black white image (two-way radiation energy grayscale image values), and heat dump surface temperature is calculated；Meanwhile passing through
Black white image and color image superposition processing, are calculated the corresponding location parameter of the heat dump surface temperature.
Further, a kind of photo-thermal power station heat dump external wall temperature measurement device further includes connecting with temperature value processing unit
Heat sink temperature real-time displaying device, the position of heat dump described in the temperature heat sink temperature real-time displaying device real-time display
The temperature value of value and the corresponding heat dump of the positional value.
Further, actual temperature value=measurement temperature value+revises value；Revision value=declared working condition measures temperature value-mark
Definite value；The measurement temperature value is the temperature value measured by the photo-thermal power station heat dump external wall temperature measurement device；The calibration
Working condition measuring temperature value is the temperature value measured under specific operation by the photo-thermal power station heat dump external wall temperature measurement device；Institute
Stating calibration value is to measure by thermocouple same position temperature to obtain.The utility model has the advantages that temperature calibration is carried out to same position,
Be conducive to more really measure the position temperature value.
Further, four road outside wall temperature information acquisition sections are uniformly arranged on four sides of photo-thermal power station heat dump outer wall
To；Imaging device imaging point center is located at the thermic load highest point of photo-thermal power station heat dump outer wall surface.The utility model has the advantages that setting
Due east, due west, due south, due north four direction are set, the photo-thermal power station heat dump outside wall temperature value of this four direction can be accurately measured.
Further, a kind of photo-thermal power station heat dump external wall temperature measurement device further includes the road X outside wall temperature information acquiring section
Part, the road the X outside wall temperature information acquisition section are uniformly arranged the other positions except 4 directions, and the X is oneself greater than 0
So number.The utility model has the advantages that increasing the road X outside wall temperature information acquisition section, photo-thermal power station heat dump outer wall measurement accuracy can be improved.
Further, the imaging device field range covers photo-thermal power station heat dump outer wall surface circumferential at least 1/4
Pickup area, i.e., the described pickup area refer to being at least with heat dump center angle 90 ° of heat dump surface region, height side
To at least covering heat dump effective heating surface region.
Further, the imaging device is camera, and the camera bottom surface and ground are in about 45 degree of arrangements.Beneficial to effect
Fruit: being greater than width dimensions in view of area of visual field height dimension, and imager pixel specification is that width dimensions are greater than height gauge
It is very little, such as 1024 × 768,640 × 480 pixels, particularly, the present invention is whole to imaging device and image collecting device (camera)
Body is rotated by 90 ° arrangement, so that the Image Acquisition width dimensions to the visual field are less than height dimension, can more make full use of pixel, mention
High image resolution, to improve temperature detecting precision.
A kind of photo-thermal power station heat dump external wall temperature measurement method includes:
The corresponding thermal image of photo-thermal power station heat dump outer wall heat radiation energy is captured, color image video information and black is formed
White image video information；
It is color image and black white image by the video information alignment processing；Then it respectively corresponds to obtain current heat dump
Positional value and the corresponding heat sink temperature value of the positional value；
Using this method can not only effectively influence of the shielding environment condition to measurement accuracy and Measurement reliability, while can pole
The big cost input for reducing measuring device.
Detailed description of the invention
Technical solution in ord to more clearly illustrate embodiments of the present application will make below to required in the embodiment of the present application
Attached drawing is briefly described, it should be understood that the following drawings illustrates only some embodiments of the application, therefore should not be seen
Work is the restriction to range, for those of ordinary skill in the art, without creative efforts, can be with
Other relevant attached drawings are obtained according to these attached drawings.
Fig. 1 is external wall temperature measurement schematic device provided by the embodiments of the present application；
Fig. 2 is that heating surface tube provided by the embodiments of the present application meets light side and backlight side temperature spot position view；
Fig. 3 is case history schematic diagram provided by the embodiments of the present application；
Fig. 4 is the case history schematic diagram that another embodiment of the application provides.
Icon:
1- heat dump outer surface 2- thermal image 3- imaging device
4- black-white CCD camera 5- colored CCD camera 6- black-white image grabbing card
The processing of 7- color/monochrome image pick-up card 8- heat sink temperature and display unit.
Specific embodiment
Below in conjunction with attached drawing in the embodiment of the present application, technical solutions in the embodiments of the present application is described.
Embodiment one: as described in Figure 1, a kind of photo-thermal power station heat dump external wall temperature measurement device includes: at least outer wall all the way
Lemperature acquisition section part forms color image video for capturing the corresponding thermal image of photo-thermal power station heat dump outer wall radiant heat energy
Information and black white image video information；And heat sink temperature processing component, for by the color image video information and black
White image video information alignment processing is color image and black white image；According to the color image and black white image, by place
Actual temperature value is obtained after reason, and the temperature value is carried out with the practical geometric position of heat dump corresponding.Wherein, the outside wall temperature
Information acquisition section includes:
1) imaging device for capturing the corresponding thermal image of photo-thermal power station heat dump outer wall radiant heat energy, and is divided into
Three road thermal images；And image collecting device, for capturing three road thermal image of synchronization, formed color video information all the way and
Two-way color video information.
It is specific:
11) imaging device includes mirror tube, object lens, varifocal mirror, beam splitter, total reflection mirror, deflecting mirror, optical filter and eyepiece；
Object lens, varifocal mirror, beam splitter, total reflection mirror, deflecting mirror, interferometric filter and eyepiece are sequentially located in mirror tube.Thermal image is first
It is transmitted in mirror tube after object lens capture, beam splitter is then entered after varifocal mirror focuses and is divided into three road images, each road figure
It is reflected into after deflecting mirror as transmission is again on total reflection mirror, and by total reflection mirror onto optical filter, enters finally into shape in eyepiece
Cheng Sanlu image.
12) image collecting device is two-way black-white CCD camera and colored CCD camera all the way.
2) heat sink temperature processing component includes: image pick-up card, for respectively corresponding the color video information and
Two-way black and white video information processing is corresponding image information；And temperature value processing unit, for according to the color image
And black white image, it handles to obtain the positional value and the corresponding heat dump of the positional value of current heat dump by dual wavelength temp measuring method
Actual temperature value.
3) the highest place of photo-thermal power station heat dump absorbing pipe outer wall surface thermic load value is referred at highest thermic load.In advance
Thermic load measurement is first carried out, is found at this.
It is specific:
21) image pick-up card can also be the equipment that wireless network card etc. supports wireless data transmission.
22) temperature value processing unit
The temperature measuring equipment course of work is: calculating heat dump surface temperature and corresponding positional value than thermometry using double-colored.
Approach one (temperature value calculating process): it measures the radiation energy of measurand simultaneously under two different wave lengths, passes through
Optical means isolates two images from the radiant image of same target, is obtained respectively by different monochromatic filters monochromatic
It is stringent duochrome method that radiation image, two width monochromatic radiation Image Acquisition and processing, which separately carry out this,.For black and white in the design
The corresponding image information of video information (this two-way image information is the two images isolated from same target radiant image)
Using double-colored than thermometry, obtain current heat dump surface temperature value (the temperature value calculating process is the prior art).
Approach two (positional value treatment process): processing is compared with color image position in black white image, obtains each temperature
The position of angle value in the picture, then the coordinate position of each temperature spot and heat dump geometric coordinate position are handled, obtain suction
Hot device each position and its temperature, in the design using it is double-colored than thermometry simultaneously to color video for image handle,
Obtain the corresponding positional value of temperature value in approach one (the positional value treatment process is the prior art).
The course of work:
After the starting operation of heat dump 1, outside radiant heat energy, radiant heat energy forms thermal image 2, and thermal image 2 is entered into
As being divided into the identical image in three tunnels in device 3；
Two-way image is captured by black and white camera 4 and third road image by colour imagery shot 5, is then respectively fed to 1)
It is converted into the calculating that gray value of image is used for temperature value in black-white image grabbing card 6, is sent in 2) Color Image Acquisition card 7
Cromogram is converted into for image temperature corresponding position.
Embodiment two: it is based on embodiment one, the temperature measuring equipment further includes the heat dump connecting with temperature value processing unit
Temperature real-time displaying device, the positional value of heat dump described in the temperature heat sink temperature real-time displaying device real-time display and should
The temperature value of the corresponding heat dump of positional value.
Specific: heat sink temperature real-time displaying device is LCD, LED display, to by heat sink temperature processing unit
The temperature value and positional value of processing carry out one-to-one correspondence and show.
Embodiment three: embodiment one or two, current temperature value=measurement temperature value+revision value are based on；Revision value=calibration
Working condition measuring temperature value-calibration value；The measurement temperature value is measured by the photo-thermal power station heat dump external wall temperature measurement device
Temperature value；The declared working condition measurement temperature value is by the photo-thermal power station heat dump external wall temperature measurement device in specific operation
Under the temperature value that measures；The calibration value is to carry out calibration acquisition to same position temperature by thermocouple；
Specific calibration value acquisition process are as follows:
When needing to demarcate the measurement accuracy of temperature measuring equipment, working medium circulation is established in heat dump 1, is read after stabilization to be recycled
The reading of thermocouple 9, in conjunction with thermocouple 1 actual installation position acquisition heat dump 1 heating surface backlight side in B (such as Fig. 2 institute
Show) at kelvin rating, meet light side at A (as shown in Figure 2) using what heat sink temperature processing apparatus calculated heat dump 1
Kelvin rating (as calibration value), due to Atmospheric Condition stablize, take the temperature on same cross section at A, B identical,
By the correction factor of this amendment temperature measuring equipment, the calibration to temperature measuring equipment is realized.
Example IV: based on one of embodiment one to three, the four roads outside wall temperature information acquisition section is uniformly arranged on
Photo-thermal power station heat dump outer wall four direction (geographical location, all directions four direction) is uniformly arranged；The imaging device at
Picture point center is located at the middle part of photo-thermal power station heat dump outer wall surface.
It is specific:
Such as 1: heat dump rated power grade be 300MWt, heat dump tube panel using it is external circumferentially, using 16 pieces points
Screen constitutes heat dump, heat dump outer diameter 15m, height 16m, heat dump center absolute altitude 200m.
As shown in Fig. 3: imaging device is set in this example is said by taking 4 (or other quantity are set as needed) platforms as an example
It is bright.In view of imaging device is arranged in the peripheral ground of heat absorption tower 1, imaging device optical axis will have folder between vertical tube panel
Angle, so as to cause the trapezoidal distortion of image.Therefore to avoid trapezoidal distortion excessive, the optical axis and ground angle of imaging device are set
It is 45 °, i.e. 4 imaging device disposed at equal distance are at away from tower about 200m, the corresponding 4 pieces of tube panels of every imaging device, every imaging
The center of corresponding 2nd, the 3 piece of tube panel boundary line of device primary optical axis.The image-forming component of imaging device selects 16mm × 12mm size.
Imaging device visual field width 13m, imaging device visual field height 26m.
Pixel requirement: a temperature spot is obtained according to every absorbing pipe and is configured, then horizontal direction needs effective
Pixel number is at least 372.
Imager pixel specification is chosen: being greater than width dimensions, and imager pixel in view of area of visual field height dimension
Specification is that width dimensions are greater than height dimension, such as 1024 × 768,640 × 480 pixels are particularly needed imaging device
Rotate integrally 90 ° of installations.
Such as 2: heat dump rated power grade be 600MWt, heat dump tube panel using it is external circumferentially, using 32 pieces points
Screen constitutes heat dump, heat dump outer diameter 20m, height 22m, heat dump center absolute altitude 230m.
As shown in Fig. 4: imaging device is set in this example is said by taking 8 (or other quantity are set as needed) platforms as an example
It is bright.In view of imaging device is arranged in the peripheral ground of heat absorption tower 1, imaging device optical axis will have folder between vertical tube panel
Angle, so as to cause the trapezoidal distortion of image.Therefore to avoid trapezoidal distortion excessive, the optical axis and ground angle of imaging device are set
It is 45 °, i.e. 8 imaging device disposed at equal distance are at away from tower about 230m, and the corresponding 4 pieces of tube panels of every imaging device are every infrared
The center of corresponding 4th, the 5 piece of tube panel boundary line of thermal imaging system primary optical axis.The image-forming component of imaging device selects 16mm × 12mm ruler
It is very little.Imaging device visual field width 17m, imaging device visual field height 32m.
Pixel requirement: a temperature spot is obtained according to every absorbing pipe and is configured, then horizontal direction needs effective
Pixel number is at least 405.
Imager pixel specification is chosen: being greater than width dimensions, and imager pixel in view of area of visual field height dimension
Specification is that width dimensions are greater than height dimension, such as 1024 × 768 pixels particularly need to rotate integrally imaging device
90 ° of installations.
Embodiment five: based on the above embodiment described in one of one to four, described image acquisition device is camera, described to take the photograph
As head bottom surface and ground are in 45 degree of arrangements.So that the Image Acquisition width dimensions to the visual field are less than height dimension, it more can be sufficiently sharp
With pixel, image resolution ratio is improved, to improve detection accuracy.According to upper example calculated result, it is contemplated that visual field surplus, therefore can
Select the video camera of 1024 × 768 pixel specifications.
Embodiment six: further including between 4 road outside wall temperature information acquisition sections on the basis of one of embodiment one to five
Be uniformly arranged the road X outside wall temperature information acquisition section, the road the X outside wall temperature information acquisition section be uniformly arranged 4 directions it
Outer other positions.The above-mentioned four roads outside wall temperature information acquisition section placement position of the road X outside wall temperature information acquisition section
It is identical, it is all to be evenly arranged in around outer wall, and apart from outer wall vertical apart from identical.
Embodiment seven: outside one of embodiment one to six, the imaging device field range covering photo-thermal power station heat dump
The pickup area of wall surface at least 1/4, the heat dump surface district that it is 90 ° with heat dump center angle that the pickup area, which is referred to,
Domain.
The above description is only an example of the present application, the protection scope being not intended to limit this application, for ability
For the technical staff in domain, various changes and changes are possible in this application.Within the spirit and principles of this application, made
Any modification, equivalent substitution, improvement and etc. should be included within the scope of protection of this application.It should also be noted that similar label and
Letter indicates similar terms in following attached drawing, therefore, once it is defined in a certain Xiang Yi attached drawing, then in subsequent attached drawing
In do not need that it is further defined and explained.
The above, the only specific embodiment of the application, but the protection scope of the application is not limited thereto, it is any
Those familiar with the art within the technical scope of the present application, can easily think of the change or the replacement, and should all contain
Lid is within the scope of protection of this application.Therefore, the protection scope of the application shall be subject to the protection scope of the claim.
Claims (10)
1. a kind of photo-thermal power station heat dump external wall temperature measurement device, characterized by comprising:
At least outside wall temperature obtaining widget all the way, for capturing the corresponding thermal image of photo-thermal power station heat dump outer wall radiant heat energy,
Form color image video information and black white image video information；And
Heat sink temperature processing component, for being by the color image video information and black white image video information alignment processing
Color image and black white image；According to the color image and black white image, respectively correspond to obtain the positional value of current heat dump
And the actual temperature value of the corresponding heat dump of the positional value.
2. measuring device as described in claim 1, it is characterised in that the outside wall temperature information acquisition section includes:
Imaging device for capturing the corresponding thermal image of photo-thermal power station heat dump outer wall radiant heat energy, and is divided into three tunnels heat
Image；And
Image collecting device, for capturing three road thermal image in synchronization the same area, formed color video information all the way and
Two-way black and white video information.
3. measuring device as claimed in claim 2, it is characterised in that the heat sink temperature processing component includes:
The color video information and two-way black and white video information processing are corresponding figure for respectively corresponding by image pick-up card
As information；And
Temperature value processing unit, for handling to obtain by dual wavelength temp measuring method according to the color image and black white image
The current positional value of heat dump and the actual temperature value of the corresponding heat dump of the positional value.
4. measuring device as claimed in claim 2 or claim 3, it is characterised in that further include the heat absorption being connect with temperature value processing unit
Device temperature real-time displaying device, the positional value of heat dump described in the heat sink temperature real-time displaying device real-time display and the position
Set the temperature value of the corresponding heat dump of value.
5. measuring device as claimed in claim 4, it is characterised in that the actual temperature value=measurement temperature value+revision value；
Revision value=declared working condition measures temperature value-calibration value；The measurement temperature value is by wall temperature outside the photo-thermal power station heat dump
The temperature value that measuring device measures；The declared working condition measurement temperature value is filled by the photo-thermal power station heat dump external wall temperature measurement
Set the temperature value measured under specific operation；The calibration value is to measure by thermocouple same position temperature to obtain.
6. the measuring device as described in claim 2,3 or 5, it is characterised in that four road outside wall temperature information acquisition sections are uniformly set
It is placed in photo-thermal power station heat dump outer wall four direction；Imaging device imaging point center is located at photo-thermal power station heat dump absorbing pipe
At the highest thermic load of outer wall surface.
7. measuring device as claimed in claim 6, it is characterised in that further include the road X outside wall temperature information acquisition section, the X
Road outside wall temperature information acquisition section is uniformly arranged the other positions except 4 directions, and the X is the natural number greater than 0.
8. measuring device as claimed in claim 7, feature should cover photo-thermal power station in the imaging device field range and inhale
The pickup area of hot device outer wall surface at least 1/4, the pickup area refer to that circumferential is to be at least with heat dump center angle
90 °, short transverse is at least the heat dump surface region of heat dump effective heating surface range.
9. measuring device as claimed in claim 8, it is characterised in that the imaging device and ground are in 45 degree of tilt angle
Arrangement.
10. a kind of photo-thermal power station heat dump external wall temperature measurement method, characterized by comprising:
The corresponding thermal image of photo-thermal power station heat dump outer wall heat radiation energy is captured, color image video information and artwork master are formed
As video information；
It is color image and black white image by the video information alignment processing；
According to the color image and black white image, respectively corresponds the positional value for obtaining current heat dump and the positional value is corresponding
The actual temperature value of heat dump.
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| CN112923589A (en) * | 2021-02-05 | 2021-06-08 | 中国科学院电工研究所 | Real-time measurement method for surface heat flux density distribution of external solar heat absorber |
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