CN109425434A - A kind of plasma three dimensional temperature field measurement device for eliminating emissivity error - Google Patents
A kind of plasma three dimensional temperature field measurement device for eliminating emissivity error Download PDFInfo
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- CN109425434A CN109425434A CN201710786045.XA CN201710786045A CN109425434A CN 109425434 A CN109425434 A CN 109425434A CN 201710786045 A CN201710786045 A CN 201710786045A CN 109425434 A CN109425434 A CN 109425434A
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- 230000003595 spectral effect Effects 0.000 claims abstract description 49
- 230000005540 biological transmission Effects 0.000 claims abstract description 22
- 239000000835 fiber Substances 0.000 claims abstract description 22
- 238000010183 spectrum analysis Methods 0.000 claims abstract description 11
- 238000012545 processing Methods 0.000 claims abstract description 9
- 230000003287 optical effect Effects 0.000 claims description 16
- 238000001228 spectrum Methods 0.000 claims description 7
- 238000000034 method Methods 0.000 description 9
- 230000005855 radiation Effects 0.000 description 6
- 238000012360 testing method Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
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- 238000011160 research Methods 0.000 description 2
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- 238000004364 calculation method Methods 0.000 description 1
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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
- G01J5/0014—Radiation pyrometry, e.g. infrared or optical thermometry for sensing the radiation from gases, flames
- G01J5/0018—Flames, plasma or welding
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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
- G01J5/02—Constructional details
- G01J5/08—Optical arrangements
- G01J5/0806—Focusing or collimating elements, e.g. lenses or concave mirrors
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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
- G01J5/02—Constructional details
- G01J5/08—Optical arrangements
- G01J5/0818—Waveguides
- G01J5/0821—Optical fibres
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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
- G01J5/48—Thermography; Techniques using wholly visual means
- G01J5/485—Temperature profile
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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
- G01J5/80—Calibration
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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
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Abstract
The invention discloses a kind of plasma three dimensional temperature field measurement devices for eliminating emissivity error.The device includes two front-end collections and spectral module and Signal acquiring and processing module；Front-end collection and spectral module are realized by triangular prism to be calibrated automatically, so that two front-end collections and spectral module vertical measurement target plasma, transmission fiber end face is converged to by light a part is measured by beam-splitting structure therein, transmission fiber passes to spectral analysis module for light is measured, and the spectral information of each element wherein included is parsed by spectroanalysis instrument, the emissivity function of corresponding element is calculated by machine solution；Another part measures light and is passed to CCD, and the two-dimensional temperature field of the direction is measured using tri-stimulus, and vertical direction is overlapped mutually, that is, obtains the three-dimensional temperature field of plasma.The present invention realizes the measurement of plasma three-dimensional temperature field and eliminates emissivity bring error, and can be accurately measured in bad environments, electromagnetic interference.
Description
Technical field
The invention belongs to optical precision the field of test technology, especially a kind of plasma for eliminating emissivity error is three-dimensional
Temperature field measuring apparatus.
Background technique
The demand that the three-dimensional plasma temperature field measurement of emissivity error can be eliminated is embodied in military weapon research and development, boat
The fields such as empty space flight, the research of plasma characteristics related science, three dimensional temperature field data facilitate staff and obtain material
The relationship that matter, equipment running status and various elements interact under plasma state has scientific research important
Meaning.The method based on face formation colored CCD group is mostly used greatly for the measurement of three-dimensional temperature field at present, this method passes through shooting
Radiation image of the target under three wave bands, each pixel is stored with specific primary color values in three width images, i.e. rgb value,
The temperature field that the pixel temperature that rgb value represents constructs target face is parsed by the method for image procossing.Due to this method
It is constant empirical value that spectral emissivity is taken in parsing radiation temperature, and actually spectral emissivity is the wavelength and temperature with target
Degree variation and change, therefore for measuring three-dimensional plasma temperature there are relatively large deviations.
Other than the above is based on face formation colored CCD group method, the common spectrum based on bundle scans method
Thermometry.A kind of multispectral transient state thermo detector of point type of its principle, this method solve the spectral emissivities calculated in radiation temperature
The problem of, but the temperature point value in measuring route can only be measured using bundle scans, the whole of measured object is indicated with integrated value
Temperature can not restore true temperature inside measured object, so that the three-dimensional temperature field of tested plasma cannot be constructed.
Summary of the invention
The purpose of the present invention is to provide the plasma three dimensional temperature field measurement dresses that one kind can eliminate emissivity error
It sets, while solving the problems, such as plasma spectrometry emissivity, establishes out three-dimensional radiation temperature field.
The technical solution for realizing the aim of the invention is as follows: a kind of plasma three-dimensional temperature field for eliminating emissivity error
Measuring device, including two front-end collections and spectral module and Signal acquiring and processing module, two front-end collections and light splitting
Module includes optical filter, CCD camera；
Beam-splitter, convergent lens group be set in any one front-end collection and spectral module A, and the front-end collection with point
The collected incident light of optical module A is divided by beam-splitter, and a part is passed in the CCD camera of this module, and another part is logical
Overconvergence lens group converges to fiber end face, is passed to the first transmission fiber；Another front-end collection directly will with spectral module B
Collected incident light transmission gives the CCD camera of this module；
The spectral analysis module includes the first off-axis parabolic mirror, the second off-axis parabolic mirror, binary optical
Grid receive target surface；The module uses C-T formula beam-splitting structure, and the first transmission fiber output end is located at the reflection of the first off axis paraboloid mirror
Mirror foci receives target surface and is located at the second off-axis parabolic mirror focus；Optical signal is emitted from the first transmission fiber output end, warp
Directional light is reflected by the first off-axis parabolic mirror, directional light is divided back reflection to the second off-axis parabolic by binary raster
Face reflecting mirror, the measurement light that different elements correspond to different wave length can be converged to by the second off-axis parabolic mirror to be received on target surface
Different location, and from receive target surface on perforation hole be output to the second transmission fiber；
The Signal acquiring and processing module includes spectroanalysis instrument, digital image acquisition card, computer, and digital picture is adopted
Truck acquires and handles the electric signal that CCD camera transmits in two front-end collections and spectral module, and is sent to computer；Light
Spectrum analysis instrument acquires the narrow wavelength light that spectral analysis module transmits by the second transmission fiber, converts optical signals to electric signal
It is sent to computer；Computer parses the emissivity function of each Single wavelength of target by spectral information, is applied to three bases
Target plasma two-dimensional temperature field is calculated in color method, and two two-dimensional temperature fields in simultaneous vertical direction fit three-dimensional etc.
Gas ions temperature field.
Further, the optical filter in described two front-end collections and spectral module allows through a length of work spectrum of light wave
Within the scope of ± the 5nm of section.
Further, the beam-splitter being arranged in the front-end collection and spectral module A, can carry out simultaneously same direction
It takes pictures and spectra collection.
Further, which is calibrated automatically using Diode Green Laser device and triangular prism: utilizing half
Conductor green laser is by the anti-reception target surface for being incident to spectral analysis module of green laser, and according to the invertibity of light, green laser is by one
Part is presented in the CCD picture of front-end collection and spectral module A, if while two front-end collections it is vertical with spectral module, light
Line should be presented in the CCD picture of front-end collection and spectral module B by triangular prism, and guarantees picture position and size one
It causes, automatic calibration can be realized.
Further, in described two front-end collections and spectral module CCD camera it is equal to the two dimension of 2 vertical direction from
Daughter temperature field measures.
Compared with prior art, the present invention its remarkable advantage is: (1) realize and meanwhile to the measurement of spectral emissivity with
And the building of three-dimensional temperature field；(2) by the true measurement to spectral emissivity, substitution is existing to utilize colored area array CCD group
The steady state value of spectral emissivity in measurement method has adapted to the requirement of the multielement plasma temperature of measurement multi-wavelength range,
Improve measurement accuracy；(3) there is automatic calibration function, after installing additional triangular prism additional, using the principle of reversibility of light, see
It examines and compares the picture that green laser is presented in two CCD cameras, easy can directly carry out device adjustment, avoid measurement angle
Spend bring error；(4) using two two-dimensional temperature fields got are measured in vertical direction, directly progress three-dimensional temperature field is extensive
Multiple building, space structure is more genuine and believable；(5) transmission fiber connection front end acquisition module and rear end light-splitting processing mould are utilized
Block can make staff far from the radiation of test site, while reduce or remit the influence of live severe factor；(6) apparatus structure letter
It is single, it is small in size, it is easy to carry.
Detailed description of the invention
Fig. 1 is the structural schematic diagram for the plasma three dimensional temperature field measurement device that the present invention eliminates emissivity error.
Specific embodiment
Present invention is further described in detail with reference to the accompanying drawing.
In conjunction with Fig. 1, the present invention eliminates the plasma three dimensional temperature field measurement device of emissivity error, including two front ends
Acquisition and spectral module and Signal acquiring and processing module, two front-end collections and spectral module include optical filter 3, CCD
Video camera 4；
Beam-splitter 1, convergent lens group 2 be set in any one front-end collection and spectral module A, and the front-end collection with
The collected incident light of spectral module A is divided by beam-splitter 1, and a part is passed in the CCD camera 4 of this module, another portion
Divide and fiber end face is converged to by convergent lens group 2, is passed to the first transmission fiber 10；Another front-end collection and spectral module B
Collected incident light transmission is directly given to the CCD camera 4 of this module；
The spectral analysis module includes the first off-axis parabolic mirror 5, the second off-axis parabolic mirror 7, binary
Grating 6 receives target surface 11；The module uses C-T formula beam-splitting structure, and 10 output end of the first transmission fiber is located at the first off-axis parabolic
Reflecting mirror 5 focus in face receives target surface 11 and is located at 7 focus of the second off-axis parabolic mirror；Optical signal is from the first transmission fiber 10
Output end outgoing reflects directional light via the first off-axis parabolic mirror 5, and directional light is anti-after being divided by binary raster 6
It is mapped to the second off-axis parabolic mirror 7, the measurement light that different elements correspond to different wave length can be reflected by the second off axis paraboloid mirror
Mirror 7 converges to the different location received on target surface 11, and is output to the second transmission fiber 13 from the perforation hole received on target surface 11；
The Signal acquiring and processing module includes spectroanalysis instrument 8, digital image acquisition card 9, computer 14, digitized map
As the acquisition of capture card 9 and the electric signal that CCD camera 4 transmits in two front-end collections and spectral module is handled, and is sent to meter
Calculation machine 14；Spectroanalysis instrument 8 acquires the narrow wavelength light that spectral analysis module transmits by the second transmission fiber 13, by optical signal
It is converted to electric signal and is sent to computer 14；Computer 14 parses the emissivity letter of each Single wavelength of target by spectral information
Number is applied to calculating target plasma two-dimensional temperature field in tri-stimulus, and two two dimensions in simultaneous vertical direction
Temperature field fits three-dimensional plasma temperature field.
Further, the optical filter 3 in described two front-end collections and spectral module allows through a length of work spectrum of light wave
Within the scope of ± the 5nm of section.
Further, the beam-splitter 1 being arranged in the front-end collection and spectral module A, can to same direction simultaneously into
Row is taken pictures and spectra collection.
Further, which is calibrated automatically using Diode Green Laser device 12 and triangular prism: being utilized
Diode Green Laser device 12 is by the anti-reception target surface 11 for being incident to spectral analysis module of green laser, green to swash according to the invertibity of light
A part is presented in the CCD picture of front-end collection and spectral module A by light, if while two front-end collections and spectral module hang down
Directly, light should be presented in the CCD picture of front-end collection and spectral module B by triangular prism, and guarantees picture position and big
It is small consistent, automatic calibration can be realized.
Further, described two front-end collections are with CCD camera 4 in spectral module to the two dimension etc. of 2 vertical direction
Gas ions temperature field measures.
The advantages of plasma three dimensional temperature field measurement device of the present invention for eliminating emissivity error, is: realizing
Simultaneously to the measurement of spectral emissivity and the building of three-dimensional temperature field.Pass through the true measurement to spectral emissivity, substitution
The existing steady state value using spectral emissivity in colored area array CCD group measurement method, has adapted to the more of measurement multi-wavelength range
The requirement of element plasma temperature, improves measurement accuracy.With automatic calibration function, additional triangular prism is being installed additional
Afterwards, using the principle of reversibility of light, observation compares the picture that green laser is presented in two CCD cameras, can simplicity directly into
Luggage sets adjustment, avoids measurement angle bring error.Using two two-dimensional temperature fields got are measured in vertical direction, directly
The recovery building of row three-dimensional temperature field is tapped into, space structure is more genuine and believable.Front-end collection mould is connected using transmission fiber
Block and rear end light-splitting processing module, can make staff far from the radiation of test site, while reduce or remit live severe factor
It influences.Apparatus structure is simple, small in size, easy to carry.
Claims (5)
1. a kind of plasma three dimensional temperature field measurement device for eliminating emissivity error, it is characterised in that: including two front ends
Acquisition and spectral module and Signal acquiring and processing module, two front-end collections and spectral module include optical filter (3),
CCD camera (4)；
Beam-splitter (1), convergent lens group (2) is set in any one front-end collection and spectral module A, and the front-end collection with
The collected incident light of spectral module A is divided by beam-splitter (1), and a part is passed in the CCD camera (4) of this module, separately
A part converges to fiber end face by convergent lens group (2), is passed to the first transmission fiber (10)；Another front-end collection with point
Collected incident light transmission is directly given the CCD camera (4) of this module by optical module B；
The spectral analysis module includes the first off-axis parabolic mirror (5), the second off-axis parabolic mirror (7), binary
Grating (6) receives target surface (11)；The module use C-T formula beam-splitting structure, the first transmission fiber (10) output end be located at first from
Axis parabolic mirror (5) focus receives target surface (11) and is located at the second off-axis parabolic mirror (7) focus；Optical signal is from
The outgoing of one transmission fiber (10) output end reflects directional light via the first off-axis parabolic mirror (5), and directional light passes through two
First grating (6) is divided back reflection to the second off-axis parabolic mirror (7), and the measurement light that different elements correspond to different wave length can quilt
Second off-axis parabolic mirror (7) converge to receive target surface (11) on different location, and from receive target surface (11) on go out
Perforation is output to the second transmission fiber (13)；
The Signal acquiring and processing module includes spectroanalysis instrument (8), digital image acquisition card (9), computer (14), number
Image pick-up card (9) acquires and handles the electric signal that CCD camera (4) transmits in two front-end collections and spectral module, and passes
It send to computer (14)；Spectroanalysis instrument (8) acquires the narrow wavelength that spectral analysis module transmits by the second transmission fiber (13)
Light converts optical signals to electric signal and is sent to computer (14)；It is each that computer (14) by spectral information parses target
The emissivity function of Single wavelength is applied to calculating target plasma two-dimensional temperature field in tri-stimulus, and simultaneous is vertical
Two two-dimensional temperature fields on direction fit three-dimensional plasma temperature field.
2. the three-dimensional plasma temperature field measurement device according to claim 1 for eliminating emissivity error, feature exist
In: the optical filter (3) in described two front-end collections and spectral module allows the ± 5nm model by a length of operating spectrum band of light wave
In enclosing.
3. the three-dimensional plasma temperature field measurement device according to claim 1 for eliminating emissivity error, feature exist
The beam-splitter (1) being arranged in: the front-end collection and spectral module A, can take pictures simultaneously to same direction and spectrum
Acquisition.
4. the three-dimensional plasma temperature field measurement device according to claim 1 for eliminating emissivity error, feature exist
In: the measuring device is calibrated automatically using Diode Green Laser device (12) and triangular prism: utilizing Diode Green Laser
Device (12) is by the anti-reception target surface (11) for being incident to spectral analysis module of green laser, and according to the invertibity of light, green laser is by one
Point be presented in the CCD picture of front-end collection and spectral module A, if while two front-end collections it is vertical with spectral module, light
Should be presented on by triangular prism in the CCD picture of front-end collection and spectral module B, and guarantee picture position with it is in the same size,
Automatic calibration can be realized.
5. the three-dimensional plasma temperature field measurement device according to claim 1 for eliminating emissivity error, feature exist
In: two-dimentional plasma temperature field of the CCD camera (4) to 2 vertical direction in described two front-end collections and spectral module
It measures.
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| CN201710786045.XA CN109425434A (en) | 2017-09-04 | 2017-09-04 | A kind of plasma three dimensional temperature field measurement device for eliminating emissivity error |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110530524A (en) * | 2019-09-23 | 2019-12-03 | 河南师范大学 | A kind of direction emissivity rapid measurement device based on energy method |
| CN110530525A (en) * | 2019-09-23 | 2019-12-03 | 河南师范大学 | A kind of direction emissivity measuring device and measuring method based on bounce technique |
| CN113063499A (en) * | 2021-03-25 | 2021-07-02 | 中国华能集团清洁能源技术研究院有限公司 | Device and method for simultaneously measuring temperature and spectral radiance of pulverized coal particles |
| CN114509166A (en) * | 2022-01-27 | 2022-05-17 | 重庆大学 | High transient high temperature plasma temperature measurement system |
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| CN104316202A (en) * | 2014-11-17 | 2015-01-28 | 西华大学 | Device capable of being used for high temperature three-dimensional measurement and measuring method of device |
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| CN104316202A (en) * | 2014-11-17 | 2015-01-28 | 西华大学 | Device capable of being used for high temperature three-dimensional measurement and measuring method of device |
| CN105258802A (en) * | 2015-11-03 | 2016-01-20 | 南京理工大学 | Unstable environment transient-state temperature measuring device based on coarse and fine two-stage light splitting structure |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110530524A (en) * | 2019-09-23 | 2019-12-03 | 河南师范大学 | A kind of direction emissivity rapid measurement device based on energy method |
| CN110530525A (en) * | 2019-09-23 | 2019-12-03 | 河南师范大学 | A kind of direction emissivity measuring device and measuring method based on bounce technique |
| CN113063499A (en) * | 2021-03-25 | 2021-07-02 | 中国华能集团清洁能源技术研究院有限公司 | Device and method for simultaneously measuring temperature and spectral radiance of pulverized coal particles |
| CN114509166A (en) * | 2022-01-27 | 2022-05-17 | 重庆大学 | High transient high temperature plasma temperature measurement system |
| CN114509166B (en) * | 2022-01-27 | 2024-02-23 | 重庆大学 | High-transient high-temperature plasma temperature measurement system |
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