CN1542433A - Apparatus for measuring composition and content of solid substance by utilizing near infrared spectra - Google Patents
Apparatus for measuring composition and content of solid substance by utilizing near infrared spectra Download PDFInfo
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- CN1542433A CN1542433A CNA031276938A CN03127693A CN1542433A CN 1542433 A CN1542433 A CN 1542433A CN A031276938 A CNA031276938 A CN A031276938A CN 03127693 A CN03127693 A CN 03127693A CN 1542433 A CN1542433 A CN 1542433A
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Abstract
The present invention is apparatus for obtaining component content in solid matter via near infrared spectrum analysis. The apparatus includes light source, light splitting system, diffuse scattering light collecting system, sample, photoelectric sensor, reference photoelectric sensor, amplifier, A/D converter, light beam splitting mirror, temperature sensor system, control module, spectrum data register, temperature register, calibration parameter register, calculation module and result output module. The present invention has no moving part, has high detection precision and rich spectral information, and may be used in obtaining several components and their contents. The present invention solves the problem of incorrect measurement result caused by different measured sample temperature and sample calibrating temperature.
Description
Technical field: the present invention relates to a kind of solid matter composition and analysis on Content technology, particularly relate to the device that a kind of use near-infrared spectral analysis technology obtains component content in the solid matter (containing the machine component) to containing the machine component.
Background technology:
For example when measuring the compositions such as water, fugitive constituent, ash and fixed carbon of coal, the general employing got quantitative coal sample, heats weighing step by step, calculates the content that obtains various compositions at last, and thermal value is to adopt the method for burning to obtain.Measuring Time is long, wastes time and energy, and can not in time obtain the technical analysis index of being correlated with.Exist the reason of this problem to be, the composition of coal adopts this traditional method to measure always, and the development of domestic NIR technology is later, is in the stage at the early-stage.Northwest electricity experimental study chief minister measures the moisture content of coals with two bundle infrared lights, because number of wavelengths is few, so other compositions of energy measurement not.
Cited paper has:
A) the former hero etc. of having set, the easy sizing technique of Coal Quality characteristic value, ature of coal technology, 2002, (6), 50-50.
B) Wu Shudi, thermal power plant's fire coal be high precision moisture continuous monitoring new method on conveying belt, northwest electricity technology, 2002,30 (1), 38-44.
C) the former hero etc. of having set, the easy sizing technique of Coal Quality characteristic value, material and technology (JPN), 2000,13 (6), 1425-1428.
D) Guan Yuanmin etc., nearly red outer Line To ょ Ru coal divide to analyse to adorn from Move and put Open Hair, the former sub-power Hair Electricity of vigor, 2000,12 (51), 1718-1724 (44-50).
The scheme of (Guan Yuanmin etc.) comprising in the background technology: light source, light-splitting device, diffusion light collection system, sample, photoelectric sensor, amplifier, A/D converter, computing machine, catoptron.
Light source is in the front of light-splitting device; Settle beam splitting system in light source back and catoptron front; The face of accepting of diffusion light collection system and sample accept place catoptron between the face, the face of accepting of catoptron both with sample to accept face relative, the exit facet with light-splitting device is relative again; The face of accepting of sample is relative with the receiving plane of the face of accepting of catoptron and diffusion light collection system; The receiving plane of diffusion light collection system is relative with the back side of catoptron, places the diffusion light collection system between catoptron and photoelectric sensor; The face of accepting of photoelectric sensor is relative with the exit facet of diffusion light collection system; Amplifier is connected between photoelectric sensor and the A/D converter; A/D converter is connected between amplifier and the computing machine.
Light source adopts halogen tungsten lamp, and light-splitting device adopts the filter plate beam split, and wavelength coverage is 1000～2500nm.Optical filter is installed on the motor of rotation.
Detailed content of the present invention:
Exist in the above-mentioned background technology in order to solve: 1. catoptron is between diffusion light collection system and sample, make some mirror that is reflected of diffusion light of sample block, can not enter the diffusion light collection system, if sample is not really even, measurement result can not reflect the composition attribute of sample fully.Light-splitting device need rotate then Measuring Time long, easily introduce problems such as measuring error, on-line measurement reliability weaken.3. do not consider the influence of sample temperature in the calibration model, when sample temperature and calibration sample temperature not simultaneously, measurement result is inaccurate.
The objective of the invention is to provide the device that utilizes near-infrared spectrum analysis solid matter (containing the machine component) composition that a kind of Measuring Time is short, simple to operate, accuracy of detection is higher, reliability is high.The present invention at first gathers the near infrared spectrum of solid matter, and the temperature of near infrared spectrum and solid matter, corresponding component content are connected, and sets up stable mathematical model, guarantees the accuracy of measurement result.
Technical solution of the present invention comprises: light source, beam splitting system, diffusion light collection system, sample, photoelectric sensor, reference light electric transducer, amplifier, A/D converter, beam splitter, temperature sensor system, control module, spectroscopic data register, temperature register, calibration parameter register, computing module, output module as a result.
When beam splitting system adopted the acousto-optic filter structure, light source was in the front of beam splitting system; Between light source and beam splitter, settle beam splitting system; The plane of incidence of beam splitter and the exit facet of beam splitting system are staggered relatively, again with the reference light electric transducer to accept face staggered relatively; Place the diffusion light collection system between beam splitter and the sample; The face of accepting and the diffusion light collection system of sample are staggered relatively; Photoelectric sensor is positioned in the middle of the diffusion light collection system; The angle a of the face of accepting of photoelectric sensor and the face of accepting of sample is 90 °≤a≤135 °; Temperature sensor system is placed in the middle of sample; Amplifier input terminal is connected with the output terminal of photoelectric sensor, reference light electric transducer respectively, and the output terminal of amplifier links to each other with the input end of A/D converter; The output terminal of A/D converter links to each other with the I/O mouth of control module; The output terminal of temperature sensor system links to each other with another I/O mouth of control module; Control module is also controlled light source and beam splitting system respectively, control module also links to each other with output module as a result with spectroscopic data register, temperature register, calibration parameter register, computing module, spectroscopic data register, temperature register and calibration parameter register are used for the storage of spectroscopic data, temperature data and calibration parameter, and computing module is used to set up the component content of calibration model and calculation sample.Output module is used for component content result's demonstration and printing as a result.
When beam splitting system adopts optical grating construction: save reference light electric transducer, two parts of beam splitter.The workplace of light source and sample is staggered relatively; The diffusion light collection system is positioned at the centre of two light sources, places the diffusion light collection system between the workplace of beam splitting system and the workplace of sample; The receiving plane of diffusion light collection system is relative with the workplace of sample; The workplace of beam splitting system is relative with the exit facet of diffusion light collection system, and the receiving plane with photoelectric sensor is relative again; The receiving plane of photoelectric sensor is vertical with the emergent light axis direction of light-splitting device; Temperature sensor system is placed in the middle of sample; Amplifier input terminal is connected with the output terminal of photoelectric sensor, and the output terminal of amplifier links to each other with the input end of A/D converter.All the other connections are the same.
When beam splitting system adopts filter sheet structure, save reference light electric transducer, two parts of beam splitter.The plane of incidence of beam splitting system is close to the exit facet of light source and is placed; The exit facet of beam splitting system and the workplace of sample are staggered relatively; The diffusion light collection system is positioned at the centre of a plurality of light sources, places the diffusion light collection system between the face of accepting of photoelectric sensor and the workplace of sample; The receiving plane of diffusion light collection system is relative with the workplace of sample; The face of accepting of photoelectric sensor is relative with the exit facet of diffusion light collection system; Temperature sensor system is placed in the middle of sample; Amplifier input terminal is connected with the output terminal of photoelectric sensor, and the output terminal of amplifier links to each other with the input end of A/D converter.All the other connections are the same.
The course of work of apparatus of the present invention:
When beam splitting system adopts the acousto-optic filter structure, the illumination that light source sends is mapped to beam splitting system, be divided into two bundles from the light of beam splitting system outgoing by beam splitter, a branch of light passes through the diffusion light collection system and shines the receiving plane of sample, after the diffusion light of sample is collected by the diffusion light collection system and by the photoelectric sensor sensed light signal; Another bundle light is directly received by the reference light electric transducer.Photoelectric sensor and reference light electric transducer are transformed into electric signal with light signal, and electric signal is exaggerated device and amplifies, and is transformed into digital signal through A/D converter again and passes to control module, and control module deposits these signals in the spectroscopic data register.Temperature sensor system becomes the temperature signal of sample into digital signal and passes to control module, and control module deposits signal in temperature register.Control module is sent the spectroscopic data in the spectroscopic data register, the temperature data in the temperature register and the calibration parameter of calibrating in the parameter register into computing module, after computing module calculates, data result is sent control module back to, and control module is sent data result into output module demonstration as a result and printed.Light source and beam splitting system are controlled by control module, and whether the monitoring light source luminescent is normal, guarantee that light source luminescent intensity is constant, and the control beam splitting system realizes the beam split operation.
When beam splitting system adopts optical grating construction, the light source irradiation sample, the diffusion light collection system is collected the diffusion light of sample, and be mapped on the beam splitting system, after the beam splitting system beam split, photoelectric sensor is accepted the light signal of each wavelength and is become electric signal, and all the other working methods are identical with aforesaid way.
When beam splitting system adopts filter sheet structure, the illumination that light source sends is on beam splitting system, and the monochromatic light of beam splitting system outgoing shines sample, and the diffusion light collection system is collected the diffusion light of sample, and be mapped on the photoelectric sensor, all the other working methods are identical with aforesaid way.
Advantage of the present invention:
When beam splitting system adopts acousto-optic filter, change the light that voltage can obtain different frequency, in measuring process, whole device does not have moving-member, has solved the problem that light-splitting device rotation, Measuring Time are grown; The diffusion light collection system is selected the integrating sphere structure, and this structure has been avoided the problem of catoptron frequency modulated light, receives the diffusion light of sample as much as possible, has solved the inhomogeneous sample spectra poor repeatability that causes of sample, the inaccurate problem of measurement result simultaneously.Beam splitter and the reference light that obtains with reference to photosensor structure provide real-time reference signal for the sample diffusion light, have also improved accuracy of detection.Beam splitting system guarantees that sample is abundant in the quantity of information of whole spectral region, therefore can obtain the multiple components and the content of sample simultaneously.The temperature data that temperature sensor system is gathered has solved sample temperature and calibration sample temperature not simultaneously as the parameter of calibration model, the problem that measurement result is inaccurate.
When beam splitting system adopted grating, because photoelectric sensor adopts detector array, in measuring process, whole device did not have moving-member, had solved the problem that light-splitting device rotation, Measuring Time are grown; The diffusion light collection system adopts binary optical lenses, and the binary optical lenses bore can design greatlyyer, and this structure has been avoided the problem of catoptron frequency modulated light, receives the diffusion light of sample as much as possible, has solved the homogeneity question of sample simultaneously; The temperature data that temperature sensor system is gathered has solved sample temperature and calibration sample temperature not simultaneously as the parameter of calibration model, the problem that measurement result is inaccurate.
When beam splitting system adopted optical filter, because optical filter directly is bonded at light source-LED front area and is fixed into one, whole device did not have moving-member, had solved the problem that light-splitting device rotates; Because the size of light source is little, can place a plurality of light sources, a plurality of monochromatic source irradiation samples guarantee that sample is abundant in the quantity of information of whole spectral region.The temperature data that temperature sensor system is gathered has solved sample temperature and calibration sample temperature not simultaneously as the parameter of Temperature Scaling model, the problem that measurement result is inaccurate.
Description of drawings:
Fig. 1 is that theory diagram of the present invention also is a Figure of abstract
Fig. 2 and Fig. 3 are the synoptic diagram of embodiment
Embodiment
A: device constitutes
The serviceability temperature scope of apparatus of the present invention is 4～40 ℃.
1) embodiment one
As shown in Figure 1, light source 1 adopts halogen tungsten lamp; Beam splitting system 2 adopts the acousto-optic filter structure; Diffusion light collection system 3 adopts the integrating sphere structure; Sample 4 is that solid matter (containing the machine component) is as coal, textile, food, medicine etc.Photoelectric sensor 5 and reference light electric transducer 6 can be selected silicon detector, indium gallium arsenic detector or ead sulfide detector respectively, wavelength coverage be 900nm～2500nm uniformly-spaced or unequal interval.Amplifier 7 can adopt the device of models such as OPA11, OP27, OP37, PQA103, INA118, INA114 respectively; A/D converter 8 can adopt the device of models such as ADS1211, ADS7807, AD7701, AD7731, AD7710, AD7670, AD7705, AD7730, AD7716 respectively; Beam splitter 9 adopts the thick SiO of 1mm
2Glass, two-sided plating anti-reflection film sees through filter 98%; Temperature sensor 10 adopts nickel chromium triangle nickel aluminium, nickel chromium triangle nisiloy or thermocouple sensor; Control module 11 can adopt CPU control modules such as 89C51,89C196, DSP, TMS320, Intel PentiumII, Intel PentiumIII, Intel PentiumIV respectively; Spectroscopic data register 12, temperature register 13, calibration parameter register 14 can adopt DS1230, RAM such as 62256 respectively; Computing module 15 can adopt 89C51,80487, coprocessors such as 80587 respectively; Output module 16 comprises LCD (or CRT monitor), laser printer (or ink-jet printer, stylus printer) as a result.
The angle a of the face of accepting of photoelectric sensor 5 and the face of accepting of sample 4 can be chosen as 90 °, 120 °, 135 ° respectively; Temperature sensor 10 is passed to control module 11 with the temperature T of sample, and the scope of T is 4～40 ℃; The electric signal of photoelectric sensor 5 measuring samples under each wavelength becomes digital signal V behind amplifier, A/D converter
Si, and send into control module 11.The electric signal of reference light electric transducer 6 each wavelength of witness mark light becomes digital signal V behind amplifier, A/D converter
Ri, and send into control module 11.Control module 11 is with V
Si, V
RiSend into computing module 15, computing module 15 is by the spectral absorption value of following formula calculation sample in each wavelength points:
A
i＝LOG
10(V
Ri/V
Si)
Wherein, i be in wavelength coverage 900～2500nm scope uniformly-spaced or the wavelength points of unequal interval.A
900～A
2500Set be called the absorption spectrum A of sample in 900～2500nm wavelength coverage
iMeasure similar multiple known composition and content C respectively
1～kThe absorption spectrum A of sample
iAnd sample temperature T.Applied mathematics, statistical science and stoichiometry learn a skill, and control module 11 is with A
iDeposit in the spectroscopic data register 12, T is deposited in the temperature register 13, with A
iCall in computing module 15 computings with T and set up the composition and the content C of sample
1～kWith absorption spectrum A
iAnd the calibration model f between temperature T
1～k: C
1～k=f
1～k(A
900～2500, T
4～40), k is the one-tenth umber (K=1,2,3......) of sample.Control module 11 is with calibration model f
1～kDeposit in the calibration parameter register 14.When measuring unknown sample, at first instrument and sample are put well, then the absorption spectrum A of measuring samples
iAnd temperature T, last control module 11 is with calibration model f
1～kFrom calibration parameter register 14 call in the computing module 15, computing module 15 is absorption spectrum A
iAnd temperature T substitution calibration model f
1～kIn, calculate the composition and the content C of this sample
1～k, as water (0.5～40%), fugitive constituent (0.5～40%), ash (0.5～40%), the activated charcoal (0.5～40%) of coal; The cotton of textile (0～100%), hair (0～100%), silk (0～100%), fiber crops (0～100%), regenerated fiber (0～100%); The protein of food (0.5-50%), fat (0.5-50%), starch (0.5-50%), moisture content (0.5-50%) etc.Control module 11 is with the composition and the content C that calculate
1～kShowing printing in the output module 16 as a result.
2) embodiment two
As shown in Figure 2, light source 1, amplifier 7, A/D converter 8, temperature sensor 10, control module 11, spectroscopic data register 12, temperature register 13, calibration parameter register 14, computing module 15, output module 16 employed devices are identical with embodiment one as a result.Beam splitting system 2 adopts optical grating construction; Diffusion light collection system 3 adopts the binary optical lenses structure; Photoelectric sensor 5 adopts silicon array detector or indium gallium arsenic detector array.
The angle a of the face of accepting of the exit facet of light source 1 and sample 4 may be selected to be 30 °, 35 °, 45 °; Temperature sensor 10 is passed to control module with the temperature of sample, and the electric signal of each wavelength of the sample that photoelectric sensor 5 detects becomes digital signal V behind amplifier, A/D converter
Si, and send into computing machine.By the spectral absorption value of following formula calculation sample in each wavelength points,
A
i＝LOG
10(1/V
Si)
Set up the composition and the content C of sample
1～kWith absorption spectrum A
i, the calibration model f between temperature T
1～kMethod identical with embodiment one.The method of measuring unknown sample is identical with embodiment one.
3) embodiment three
As shown in Figure 3, light source 1 adopts light emitting diode, and beam splitting system 2 adopts optical filter, and diffusion light collection system 3 adopts the binary optical lenses structure.Photoelectric sensor 5 can be selected silicon detector, indium gallium arsenic detector or ead sulfide detector respectively.Amplifier 7, A/D converter 8, temperature sensor 10, control module 11, spectroscopic data register 12, temperature register 13, calibration parameter register 14, computing module 15, output module 16 employed devices are identical with embodiment one as a result.The angle a of the face of accepting of the exit facet of light-splitting device 2 and sample 4 may be selected to be 30 °, 35 °, 45 °.Calculation sample is at the spectral absorption value A of each wavelength points
iMethod identical with embodiment two, set up the composition and the content C of sample
1～kWith absorption spectrum A
i, the calibration model f between temperature T
1～kMethod identical with embodiment one.The method of measuring unknown sample is identical with embodiment one.
Claims (3)
1, utilize the device of near-infrared spectral measurement solid matter component content, comprise light source (1), sample (4), amplifier (7), A/D converter (8), it is characterized in that also including: beam splitting system (2), diffusion light collection system (3), photoelectric sensor (5), reference light electric transducer (6), beam splitter (9), temperature sensor system (10), control module (11), spectroscopic data register (12), temperature register (13), calibration parameter register (14), computing module (15), output module (16) as a result, light source (1) is in the front of beam splitting system (2); Between light source (1) and beam splitter (9), settle beam splitting system (2); The exit facet of the plane of incidence of beam splitter (9) and beam splitting system (2) is staggered relatively, again with reference light electric transducer (6) to accept face staggered relatively; Place diffusion light collection system (3) between beam splitter (9) and the sample (4); The face of accepting of sample (4) and diffusion light collection system (3) are staggered relatively; Photoelectric sensor (5) is positioned in the middle of the diffusion light collection system (3); The angle a of the face of accepting of the face of accepting of photoelectric sensor (5) and sample (4) is 90 °≤a≤135 °; Temperature sensor system (10) is placed in the middle of sample (4); The input end of amplifier (7) is connected with the output terminal of photoelectric sensor (5), reference light electric transducer (6) respectively, and the output terminal of amplifier (7) links to each other with the input end of A/D converter (8); The output terminal of A/D converter (8) links to each other with the I/O mouth of control module (11); The output terminal of temperature sensor system (10) links to each other with another I/O mouth of control module (11); Control module (11) is also controlled light source (1) and beam splitting system (2) respectively, control module (11) also with spectroscopic data register (12), temperature register (13), calibration parameter register (14), computing module (15) links to each other with output module (16) as a result, spectroscopic data register (12), temperature register (13) and calibration parameter register (14) are used for spectroscopic data, the storage of temperature data and calibration parameter, computing module (15) is used to set up calibration model, the component content of calculation sample, output module (16) is used for component content result's demonstration and printing as a result.
2, utilize the device of near-infrared spectral measurement solid matter component content, comprise light source (1), sample (4), amplifier (7), A/D converter (8), it is characterized in that also including: beam splitting system (2), diffusion light collection system (3), photoelectric sensor (5), temperature sensor system (10), control module (11), spectroscopic data register (12), temperature register (13), calibration parameter register (14), computing module (15), output module (16) as a result, light source (1) is staggered relatively with the workplace of sample (4); Diffusion light collection system (3) is positioned at the centre of two light sources (1), places diffusion light collection system (3) between the workplace of the workplace of beam splitting system (2) and sample (4); The receiving plane of diffusion light collection system (3) is relative with the workplace of sample (4); The workplace of beam splitting system (2) is relative with the exit facet of diffusion light collection system (3), and the receiving plane with photoelectric sensor (5) is relative again; The receiving plane of photoelectric sensor (5) is vertical with the emergent light axis direction of light-splitting device (2); Temperature sensor system (10) is placed in the middle of sample (4); The input end of amplifier (7) is connected with the output terminal of photoelectric sensor (5), and the output terminal of amplifier (7) links to each other with the input end of A/D converter (8); The output terminal of A/D converter (8) links to each other with the I/O mouth of control module (11); The output terminal of temperature sensor system (10) links to each other with another I/O mouth of control module (11); Control module (11) is also controlled light source (1) and beam splitting system (2) respectively, control module (11) also with spectroscopic data register (12), temperature register (13), calibration parameter register (14), computing module (15) links to each other with output module (16) as a result, spectroscopic data register (12), temperature register (13) and calibration parameter register (14) are used for spectroscopic data, the storage of temperature data and calibration parameter, computing module (15) is used to set up calibration model, the component content of calculation sample, output module (16) is used for component content result's demonstration and printing as a result.
3, utilize the device of near-infrared spectral measurement solid matter component content, comprise light source (1), sample (4), amplifier (7), A/D converter (8), it is characterized in that also including: beam splitting system (2), diffusion light collection system (3), photoelectric sensor (5), temperature sensor system (10), control module (11), spectroscopic data register (12), temperature register (13), calibration parameter register (14), computing module (15), output module (16) as a result, the plane of incidence of beam splitting system (2) is close to the exit facet of light source (1) and is placed; The workplace of the exit facet of beam splitting system (2) and sample (4) is staggered relatively; Diffusion light collection system (3) is positioned at the centre of a plurality of light sources (1), places diffusion light collection system (3) between the workplace of the face of accepting of photoelectric sensor (5) and sample (4); The receiving plane of diffusion light collection system (3) is relative with the workplace of sample (4); The face of accepting of photoelectric sensor (5) is relative with the exit facet of diffusion light collection system (3); Temperature sensor system (10) is placed in the middle of sample (4); The input end of amplifier (7) is connected with the output terminal of photoelectric sensor (5), and the output terminal of amplifier (7) links to each other with the input end of A/D converter (8); The output terminal of A/D converter (8) links to each other with the I/O mouth of control module (11); The output terminal of temperature sensor system (10) links to each other with another I/O mouth of control module (11); Control module (11) is also controlled light source (1) and beam splitting system (2) respectively, control module (11) also with spectroscopic data register (12), temperature register (13), calibration parameter register (14), computing module (15) links to each other with output module (16) as a result, spectroscopic data register (12), temperature register (13) and calibration parameter register (14) are used for spectroscopic data, the storage of temperature data and calibration parameter, computing module (15) is used to set up calibration model, the component content of calculation sample, output module (16) is used for component content result's demonstration and printing as a result.
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| CNB031276938A CN100414286C (en) | 2003-08-14 | 2003-08-14 | Apparatus for measuring composition and content of solid substance by utilizing near infrared spectra |
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| CNB031276938A CN100414286C (en) | 2003-08-14 | 2003-08-14 | Apparatus for measuring composition and content of solid substance by utilizing near infrared spectra |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101813623A (en) * | 2010-04-22 | 2010-08-25 | 天津大学 | Scatterer multi-dimensional spectral measuring unit and method |
| CN103499391A (en) * | 2013-09-06 | 2014-01-08 | 清华大学 | Spectrum measuring system |
| CN103528984A (en) * | 2013-10-22 | 2014-01-22 | 长春长光思博光谱技术有限公司 | Optical grating type near infrared analyzer |
| CN105891146A (en) * | 2016-03-29 | 2016-08-24 | 电子科技大学 | Intelligent terminal for spectrum detection and detection method thereof |
| CN107860718A (en) * | 2017-12-08 | 2018-03-30 | 杭州驱歌科技有限公司 | A kind of water analysis outfit |
| CN108680529A (en) * | 2018-04-03 | 2018-10-19 | 北京英思创科技有限公司 | The secondary Infrared Measuring System and method of medium ingredient real-time and precise detection device |
| CN116297320A (en) * | 2023-05-09 | 2023-06-23 | 北京易兴元石化科技有限公司 | Near infrared spectrum system for coal quality analysis and coal quality analysis method |
| CN116297272A (en) * | 2023-05-22 | 2023-06-23 | 北京易兴元石化科技有限公司 | On-line coal quality analysis system and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4404642A (en) * | 1981-05-15 | 1983-09-13 | Trebor Industries, Inc. | Apparatus for near infrared quantitative analysis with temperature variation correction |
| JPH02221823A (en) * | 1989-02-22 | 1990-09-04 | Hitachi Ltd | Photometer |
| CN1074832C (en) * | 1998-11-20 | 2001-11-14 | 清华大学 | On-line near infrared multicomponent measuring method and apparatus |
| CN2634470Y (en) * | 2003-08-14 | 2004-08-18 | 中国科学院长春光学精密机械与物理研究所 | Device for measuring solid matter component content using near infrared spectrum |
-
2003
- 2003-08-14 CN CNB031276938A patent/CN100414286C/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101813623A (en) * | 2010-04-22 | 2010-08-25 | 天津大学 | Scatterer multi-dimensional spectral measuring unit and method |
| CN103499391A (en) * | 2013-09-06 | 2014-01-08 | 清华大学 | Spectrum measuring system |
| CN103499391B (en) * | 2013-09-06 | 2016-08-10 | 清华大学 | Spectral measurement system |
| CN103528984A (en) * | 2013-10-22 | 2014-01-22 | 长春长光思博光谱技术有限公司 | Optical grating type near infrared analyzer |
| CN105891146A (en) * | 2016-03-29 | 2016-08-24 | 电子科技大学 | Intelligent terminal for spectrum detection and detection method thereof |
| CN107860718A (en) * | 2017-12-08 | 2018-03-30 | 杭州驱歌科技有限公司 | A kind of water analysis outfit |
| CN108680529A (en) * | 2018-04-03 | 2018-10-19 | 北京英思创科技有限公司 | The secondary Infrared Measuring System and method of medium ingredient real-time and precise detection device |
| CN116297320A (en) * | 2023-05-09 | 2023-06-23 | 北京易兴元石化科技有限公司 | Near infrared spectrum system for coal quality analysis and coal quality analysis method |
| CN116297320B (en) * | 2023-05-09 | 2023-09-08 | 北京易兴元石化科技有限公司 | Near infrared spectrum system for coal quality analysis and coal quality analysis method |
| CN116297272A (en) * | 2023-05-22 | 2023-06-23 | 北京易兴元石化科技有限公司 | On-line coal quality analysis system and method |
| CN116297272B (en) * | 2023-05-22 | 2023-08-18 | 北京易兴元石化科技有限公司 | On-line coal quality analysis system and method |
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| CN100414286C (en) | 2008-08-27 |
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