CN205826137U - A kind of temperature measurement system based on imageing sensor - Google Patents
A kind of temperature measurement system based on imageing sensor Download PDFInfo
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- CN205826137U CN205826137U CN201620532378.0U CN201620532378U CN205826137U CN 205826137 U CN205826137 U CN 205826137U CN 201620532378 U CN201620532378 U CN 201620532378U CN 205826137 U CN205826137 U CN 205826137U
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- temperature
- temperature measurement
- imageing sensor
- measurement system
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Abstract
The utility model discloses a kind of temperature measurement system based on imageing sensor, it is characterised in that: include imaging system, image sensing and image processing system；Described imaging system includes filter plate and camera lens, and camera lens includes eyeglass and aperture, for the thermal radiation signal of testee is gathered in CCD photosurface, controls the luminous flux passed through simultaneously；Described image sensing includes colourful CCD video camera and USB extender, and colourful CCD video camera is used for carrying out opto-electronic conversion, exports the rgb signal with temperature information, and USB extends for realizing the remote high-speed transmission remotely controlled with data；Described image processing system, shows and analyzing and processing data for temperature computation, temperature field.The use of temperature measurement system of the present utility model decreases the temperature measurement error that the factors such as grey scale change and the CCD response wave length bandwidth imperfection of heat radiator cause, and simultaneous camera has the widest temperature-measuring range.
Description
Technical field
This utility model relates to a kind of temperature measurement system, a kind of non-contacting temperature based on imageing sensor
Measurement system.
Background technology
Contact-free measurement of temperature method is to utilize the radiant intensity of object and the functional relationship of temperature to realize the survey of temperature
Amount, have noncontact, do not destroy thermometric field, high-temperature targets can be measured, to measure the speed of response fast and can survey moving object
The advantage of temperature.
But the radiance of object is affected by optical system, site environment, surface character and material behavior, the most also by quilt
The height of testing temperature, CCD spectral response, the time of integration and the impact of aperture size, the result surveyed has the biggest error.To survey
Temperature image processes, and this just requires to identify image object fast and effectively, in order to image is carried out accurate thermometric,
Image carries out Fast Segmentation aspect, and general method is all to improve existing traditional algorithm, although splitting speed has
Improved, but effect is not clearly.
The thermometry commonly used now has monochromatic thermometry and two-color thermometry, but monochromatic thermometry needs selection the narrowest
Wave band, with get rid of other wavelength light waves interference radiate, but bandwidth is narrow, the energy that detector can be made to receive becomes very
Little, it is impossible to produce enough responses, the biggest error can be brought；Use colorimetry thermometric, be only black matrix or ash when actual object
During body, the temperature measured is only the temperature of actual object, and the spectral emissivity change that colorimetry thermometric have ignored actual object is right
The impact of temperature-measuring results, spectral emissivity is relevant with factors such as material, temperature and wavelength, it is impossible to accurately know, so still having
Bigger error.
Utility model content
Goal of the invention of the present utility model is: for the problem of above-mentioned existence, it is provided that a kind of based on three-color method,
There is the video camera of the widest dynamic range, the temperature measurement system based on imageing sensor that can remotely control.
The technical solution adopted in the utility model is as follows:
A kind of temperature measurement system based on imageing sensor of this utility model, including imaging system, image sensing
And image processing system；Described imaging system includes filter plate and camera lens, and camera lens includes eyeglass and aperture, for by testee
Thermal radiation signal be gathered on CCD photosurface, control the luminous flux passed through simultaneously；Described image sensing includes colour
Ccd video camera and USB extender, colourful CCD video camera is used for carrying out opto-electronic conversion, exports the rgb signal with temperature information,
USB extender is for realizing the remote high-speed transmission remotely controlled with data；Described image processing system, for temperature computation,
Temperature field shows and analyzing and processing data.
Temperature measurement system based on imageing sensor of the present utility model, described colourful CCD video camera is installed on support
On, it is provided with damping device on support simultaneously.
Colourful CCD video camera in above structure is by camera lens, sensor, color separation circuit, the process of tristimulus signals
Circuit and chromacoder composition；Through object signal imaging in CCD chip after color filter of camera lens, from the light formed
Learn and signal takes out the picture signal containing colour signal, then send into color separation letter together with the picture signal taken out with delay line
Number, isolated tristimulus signals pass through low pass filter, more amplified entrance chromacoder, output composite video image letter
Number.Damping device on support can reduce due to the vibration of CCD and rock and the error that produces.
Temperature measurement system based on imageing sensor of the present utility model, described filter plate uses neutral optical filtering
Sheet, is used for weakening target light intensity, improves the sensitive volume of ccd video camera, it is to avoid it reaches saturated；Described filter plate includes 2%,
The neutral optical filtering of 11% and 26%.
Above structure, arranges neutral colour filter before video camera, is used for weakening target light intensity, can make non-saturated region width
Increase, thus expand the dynamic range of video camera.
Temperature measurement system based on imageing sensor of the present utility model, described image sensing also includes that aperture is certainly
Autocontrol system: described aperture automatic control system includes the amplifier being sequentially connected with, clamper, integrator, comparator and drives
Dynamic motor, and the datum being connected with comparator；Described amplifier and CCD connect；Described driving motor connects aperture.
Above structure, the operation principle of aperture automatic control system is: incident illumination focuses on through optical glass, iris aperture
On the photosurface of CCD, CCD converts optical signals into the signal of telecommunication, and through signal processing, exports video signal；Another road CCD
Output signal is amplified, clamp, sends into integrator, and the result after integration compares with datum, when integrated signal is less than
Or during higher than fiduciary level, drive motor to rotate, drive aperture to change to increasing or reduce clear aperature direction, thus reach to adjust
The purpose of joint photosurface illumination, thus expand the temperature-measuring range of video camera.
Temperature measurement system based on imageing sensor of the present utility model, the processing method of described image processing system
For: according to the calibration result of temp measuring system, select thermometric pattern；Image is carried out pretreatment, carries out target recognition simultaneously, will know
Other target image substitutes into thermometric formulaBeing analyzed calculating, in formula, r is red pixel value, g
Being green pixel values, b is blue pixel value, and K is calibration value, C2=1.4388 × 104Um K, λr=700nm, λg=
546.1nm, λb=435.8nm, obtains the colour temperature of temperature field each point, is shown with pseudocolour picture form by temperature value.
Have employed three-color method in the processing method of images above processing system, the gray scale decreasing heat radiator becomes
The temperature measurement error that the factors such as change and CCD response wave length bandwidth imperfection cause, improves temperature measurement accuracy.
Temperature measurement system based on imageing sensor of the present utility model, described target recognition includes image segmentation and figure
As denoising；The method of described image segmentation is: the red color component value of all for image pixels is made statistics with histogram, is designated as g (i), g
(i) be gray level be the number of the pixel of i；Daubechies small echo is utilized to draw low-pass filter coefficients Lo-D, to g (i)
Carry out wavelet decomposition to obtainCalculate with maximum variance between clustersMiddle optimal segmenting threshold t, the threshold value of original image is T
=t*2r；According to threshold value T, image is split.
The method of images above segmentation, obtains the low frequency division of image by image histogram statistic carries out wavelet decomposition
Amount, makes image gray levels substantially reduce simultaneously, thus is substantially reduced the hunting zone of segmentation threshold, the maximum kind that recycling simplifies
Between variance method ask for segmentation threshold, can calculate optimal segmenting threshold exactly, accelerate arithmetic speed；Image Fast Segmentation can
So that target is carried out identification accurately and quickly, it is greatly improved the speed of image procossing and the real-time of temp measuring system.
Temperature measurement system based on imageing sensor of the present utility model, the method for described image denoising: segmentation is schemed
As carrying out binaryzation；First closed operation, makes up narrow interruption, eliminates little hole, and fill up the fracture in contour line；After open behaviour
Make, make the profile of object become smooth, eliminate thin outthrust.
Above method, carries out binaryzation by segmentation image；First closed operation, after open operation, can remove less than structural element
Specific image details, do not produce overall situation geometric distortion simultaneously, do not change the color value of each pixel of original image.
Temperature measurement system based on imageing sensor of the present utility model, described image processing system also includes result school
Positive method: extract temperature difference T of consecutive points, when the temperature of point is gone, except the singular point in temperature field, i.e. with phase more than 50%*T
The point that between adjoint point, the temperature difference is the biggest.
Being continuous print due to temperature field in above method, the point bigger with the consecutive points temperature difference occurred in temperature field is mistake
Point, result of calculation can be made after removal more accurate.
Temperature measurement system based on imageing sensor of the present utility model, the scaling method of described temp measuring system is: will
The temperature of thermometric object is transferred to temperature T1, fixed aperture, regulates shutter, enable video camera become clearly as；Schemed by output
As judging the saturated of image, if image is saturated, regulating shutter, reimaging, continuing to judge, if not occurring saturated, by defeated
The value of R, G, B that the Image Acquisition image certain point that goes out is corresponding and the coordinate figure of this point, preserve image；Object temperature is regulated
To temperature T2, repeat the above steps；When aperture is transferred to the least, and shutter is transferred to the least, when the image of shooting is the most saturated, stop behaviour
Make；The gray value recorded and corresponding temperature are carried out least square fitting, draws matched curve, the value of R, G, B is substituted into and surveys
Temperature formula, just obtains the K value of correspondence.
The demarcation of above temp measuring system, can correct the mistake that the factors such as the noise of CCD, camera lens light transmittance be uneven produce
Difference.
In sum, owing to have employed technique scheme, the beneficial effects of the utility model are:
1, the work of temperature measurement system based on three-color method, decreases grey scale change and the CCD of heat radiator
The temperature measurement error that the factors such as response wave length bandwidth imperfection cause, improves temperature measurement accuracy.
2, the expansion of the temperature-measuring range of video camera.Neutral colour filter is set before video camera, is used for weakening target light intensity, can
So that non-saturated region width increases, thus expand the dynamic range of video camera；Aperture automatic control system: incident illumination is through optics
Eyeglass, iris aperture focus on the photosurface of CCD, and CCD converts optical signals into the signal of telecommunication, and through signal processing, output
Video signal；Another road ccd output signal is amplified, clamp, sends into integrator, and the result after integration compares with datum
Relatively, when integrated signal is below or above fiduciary level, drive motor to rotate, drive aperture to increasing or reducing clear aperature side
To change, thus reach to regulate the purpose of photosurface illumination, thus expand the temperature-measuring range of video camera.
3, USB extender is used for realizing remotely controlling and the remote high-speed transmission of data.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of temperature measurement system based on imageing sensor of this utility model.
Fig. 2 is the structural representation of aperture automatic control system.
Detailed description of the invention
Below in conjunction with the accompanying drawings, this utility model is described in detail.
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with accompanying drawing and enforcement
Example, is further elaborated to this utility model.Should be appreciated that specific embodiment described herein is only in order to explain this
Utility model, is not used to limit this utility model.
As it is shown in figure 1, a kind of temperature measurement system based on imageing sensor of this utility model, including imaging system, figure
As sensor-based system and image processing system；Described imaging system includes filter plate and camera lens, and camera lens includes eyeglass and aperture, uses
In being gathered on CCD photosurface by the thermal radiation signal of testee, control the luminous flux passed through simultaneously；Described image sensing system
System includes colourful CCD video camera and USB extender, and colourful CCD video camera is used for carrying out opto-electronic conversion, and output is with temperature information
Rgb signal, USB extender is for realizing remotely controlling the remote high-speed transmission with data；Described image processing system, is used for
Temperature computation, temperature field show and analyzing and processing data.
Temperature measurement system based on imageing sensor of the present utility model, described colourful CCD video camera is installed on support
On, it is provided with damping device on support simultaneously.
Temperature measurement system based on imageing sensor of the present utility model, described filter plate uses neutral optical filtering
Sheet, is used for weakening target light intensity, improves the sensitive volume of ccd video camera, it is to avoid it reaches saturated；Described filter plate includes 2%,
The neutral optical filtering of 11% and 26%.
Temperature measurement system based on imageing sensor of the present utility model, described image sensing also includes that aperture is certainly
Autocontrol system: described aperture automatic control system includes the amplifier being sequentially connected with, clamper, integrator, comparator and drives
Dynamic motor, and the datum being connected with comparator；Described amplifier and CCD connect；Described driving motor connects aperture.
Temperature measurement system based on imageing sensor of the present utility model, the processing method of described image processing system
For: according to the calibration result of temp measuring system, select thermometric pattern；Image is carried out pretreatment, carries out target recognition simultaneously, will know
Other target image substitutes into thermometric formulaBeing analyzed calculating, in formula, r is red pixel value, g
Being green pixel values, b is blue pixel value, and K is calibration value, λr=700nm, λg=546.1nm, λb=435.8nm, obtains temperature
The colour temperature of degree field each point, shows temperature value with pseudocolour picture form.
Temperature measurement system based on imageing sensor of the present utility model, described target recognition includes image segmentation and figure
As denoising；The method of described image segmentation is: the red color component value of all for image pixels is made statistics with histogram, is designated as g (i), g
(i) be gray level be the number of the pixel of i；Daubechies small echo is utilized to draw low-pass filter coefficients Lo-D, to g (i)
Carry out wavelet decomposition to obtainCalculate with maximum variance between clustersMiddle optimal segmenting threshold t, the threshold value of original image is T
=t*2r；According to threshold value T, image is split.
Temperature measurement system based on imageing sensor of the present utility model, the method for described image denoising: segmentation is schemed
As carrying out binaryzation；First closed operation, makes up narrow interruption, eliminates little hole, and fill up the fracture in contour line；After open
Operation, makes the profile of object become smooth, eliminates thin outthrust.
Temperature measurement system based on imageing sensor of the present utility model, described image processing system also includes result school
Positive method: extract temperature difference T of consecutive points, when the temperature of point is gone, except the singular point in temperature field, i.e. with phase more than 50%*T
The point that between adjoint point, the temperature difference is the biggest.
Temperature measurement system based on imageing sensor of the present utility model, the scaling method of described temp measuring system is: will
The temperature of thermometric object is transferred to temperature T1, fixed aperture, regulates shutter, enable video camera become clearly as；Schemed by output
As judging the saturated of image, if image is saturated, regulating shutter, reimaging, continuing to judge, if not occurring saturated, by defeated
The value of R, G, B that the Image Acquisition image certain point that goes out is corresponding and the coordinate figure of this point, preserve image；Object temperature is regulated
To temperature T2, repeat the above steps；When aperture is transferred to the least, and shutter is transferred to the least, when the image of shooting is the most saturated, stop behaviour
Make；The gray value recorded and corresponding temperature are carried out least square fitting, draws matched curve, the value of R, G, B is substituted into and surveys
Temperature formula, just obtains the K value of correspondence.
The foregoing is only preferred embodiment of the present utility model, not in order to limit this utility model, all at this
Any amendment, equivalent and the improvement etc. made within the spirit of utility model and principle, should be included in this utility model
Protection domain within.
Claims (4)
1. a temperature measurement system based on imageing sensor, it is characterised in that: include imaging system, image sensing and
Image processing system；Described imaging system includes filter plate and camera lens, and camera lens includes eyeglass and aperture, for by testee
Thermal radiation signal is gathered on CCD photosurface, controls the luminous flux passed through simultaneously；Described image sensing includes colored CCD
Video camera and USB extender, colourful CCD video camera is used for carrying out opto-electronic conversion, exports the rgb signal with temperature information, USB
Extender is for realizing the remote high-speed transmission remotely controlled with data；Described image processing system, for temperature computation, temperature
Field display and analyzing and processing data.
Temperature measurement system based on imageing sensor the most according to claim 1, it is characterised in that: described colored CCD
Video camera is installed on support, is provided with damping device on support simultaneously.
Temperature measurement system based on imageing sensor the most according to claim 1, it is characterised in that: described filter plate is adopted
Be neutral colour filter, be used for weakening target light intensity, improve the sensitive volume of ccd video camera, it is to avoid it reaches saturated；Described
Filter plate includes the neutral optical filtering of 2%, 11% and 26%.
Temperature measurement system based on imageing sensor the most according to claim 1, it is characterised in that: described image passes
Sensing system also includes aperture automatic control system: amplifier that described aperture automatic control system includes being sequentially connected with, clamper,
Integrator, comparator and driving motor, and the datum being connected with comparator；Described amplifier and CCD connect；Described drive
Dynamic motor connects aperture.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620532378.0U CN205826137U (en) | 2016-05-31 | 2016-05-31 | A kind of temperature measurement system based on imageing sensor |
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| CN201620532378.0U CN205826137U (en) | 2016-05-31 | 2016-05-31 | A kind of temperature measurement system based on imageing sensor |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106017694A (en) * | 2016-05-31 | 2016-10-12 | 成都德善能科技有限公司 | Temperature measuring system based on image sensor |
| CN109714549A (en) * | 2017-10-25 | 2019-05-03 | 联咏科技股份有限公司 | The image sensering device of image and temperature can be sensed |
| CN118089397A (en) * | 2024-04-28 | 2024-05-28 | 宝鸡宝钛合金材料有限公司 | Smelting temperature control method and system |
-
2016
- 2016-05-31 CN CN201620532378.0U patent/CN205826137U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106017694A (en) * | 2016-05-31 | 2016-10-12 | 成都德善能科技有限公司 | Temperature measuring system based on image sensor |
| CN109714549A (en) * | 2017-10-25 | 2019-05-03 | 联咏科技股份有限公司 | The image sensering device of image and temperature can be sensed |
| CN109714549B (en) * | 2017-10-25 | 2021-03-26 | 联咏科技股份有限公司 | Image sensing device capable of sensing image and temperature |
| CN118089397A (en) * | 2024-04-28 | 2024-05-28 | 宝鸡宝钛合金材料有限公司 | Smelting temperature control method and system |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information | ||
| CB03 | Change of inventor or designer information |
Inventor after: Chen Guojun Inventor after: Long Dewei Inventor before: Xie Min |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170829 Address after: 550002, Nanming District, Guizhou City, Guiyang flower orchard five Li Chong flower orchard project V District fifteenth (15), 1 units, 13, 4 [flower orchard community] Patentee after: Guizhou excellent Petter Technology Co. Ltd. Address before: 610000 Chengdu City, Wuhou District Province, the South Ring Road, No. two, No. 1, No. 1, floor 31, No. 5 Patentee before: CHENGDU DESHANNENG TECHNOLOGY CO., LTD. |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161221 Termination date: 20170531 |