CN105486660A - Apparatus and method for online detection of performances of wood plate by using near infrared spectroscopy - Google Patents
Apparatus and method for online detection of performances of wood plate by using near infrared spectroscopy Download PDFInfo
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- CN105486660A CN105486660A CN201510828800.7A CN201510828800A CN105486660A CN 105486660 A CN105486660 A CN 105486660A CN 201510828800 A CN201510828800 A CN 201510828800A CN 105486660 A CN105486660 A CN 105486660A
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- 239000002023 wood Substances 0.000 title claims abstract description 39
- 238000001514 detection method Methods 0.000 title claims abstract description 14
- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000004497 NIR spectroscopy Methods 0.000 title abstract 2
- 239000000523 sample Substances 0.000 claims abstract description 58
- 239000007787 solid Substances 0.000 claims abstract description 30
- 230000007547 defect Effects 0.000 claims abstract description 11
- 238000004458 analytical method Methods 0.000 claims abstract description 9
- 239000000463 material Substances 0.000 claims description 69
- 230000005540 biological transmission Effects 0.000 claims description 5
- 238000002329 infrared spectrum Methods 0.000 claims description 5
- 229910000838 Al alloy Inorganic materials 0.000 claims description 3
- 238000007405 data analysis Methods 0.000 claims description 3
- 230000002950 deficient Effects 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 238000004611 spectroscopical analysis Methods 0.000 claims description 3
- 238000006073 displacement reaction Methods 0.000 claims description 2
- 238000010986 on-line near-infrared spectroscopy Methods 0.000 claims 5
- 238000001228 spectrum Methods 0.000 abstract description 5
- 230000010365 information processing Effects 0.000 abstract 1
- 230000003595 spectral effect Effects 0.000 description 5
- 239000000203 mixture Substances 0.000 description 2
- 229920002678 cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 229920005610 lignin Polymers 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000010183 spectrum analysis Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
- G01N21/359—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light using near infrared light
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
- G01N21/3563—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for analysing solids; Preparation of samples therefor
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- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The invention discloses an apparatus and a method for online detection of performances of a wood plate by using near infrared spectroscopy, and relates to an apparatus and a method for detecting performances of a solid plate. The problems of high price of an array near infrared device and inaccuracy of the analysis result of wood spectrum information acquired by a single point type near infrared device are solved in the invention. A single point type detector is adopted to analyze the performances of the wood plate, and a traversing device is designed to dynamically and flexibly realize acquisition of data of the surface of the wood plate; and a near infrared probe and a range-between-wood sheets finding sensor are arranged, the height of the near infrared probe is controlled, and a distance between the probe and a detected wood plate is constant, so the spectrum information expression accuracy is realized. A camera is used to determine whether the wood sheet has defects or not in order to improve the detection speed, and if the wood plate has defects, the performances of the wood plate cannot meet requirements, and the solid plate is directly rejected; and a computer is directly connected to carry out subsequent spectrum information processing to improve the detection speed, and automatic detection reduces the time and labor consumption of manpower.
Description
Technical field
The present invention relates to a kind of pick-up unit and method of solid wood board performance.
Background technology
Utilize near infrared spectrometer can detect the content such as chemical composition (as lignin, cellulose etc.), physical property of timber.Owing to needing probe and measured object spacing constant when near infrared detector detects, in big batch detects, therefore there is the limitation of application inconvenience.
Near infrared detector can be divided into array and single-point type two class.The near infrared gear of array can gather multiple spot near infrared light spectrum information at every turn, expresses spectral information by average treatment.Array is relatively accurate, but expensive.Single-point type near infrared gear price is relatively cheap, but solid wood exists anisotropic feature, so apply the spectral information on single-point type detector random acquisition solid wood simply, its analysis result is inaccurate.In addition, the detection of current solid wood board performance only rests on laboratory stage, does not also have on-line monitoring technique can complete the detection of the standard-sized solid wood board of batch.
Summary of the invention
The object of this invention is to provide the apparatus and method utilizing near-infrared spectrum analysis to detect solid wood board performance, expensive with the near infrared gear solving array, and single-point type near infrared gear gathers the spectral information on solid wood, the inaccurate problem of its analysis result.The object of the present invention is achieved like this:
Apparatus of the present invention comprise worktable 1, the carrying of tested sheet material and moving-member 2, near-infrared probe bogey 3, flotation-dividing part, distance measuring equipment 4, near-infrared probe height adjusting member 5, near-infrared probe 6, camera 8, clamping device 9, feeding platform 11 and host computer;
Tested sheet material carrying is made up of two longitudinal rails, cross slide way and moving-members with moving-member 2, and longitudinal rail and cross slide way fixed and arranged are on the upper face of worktable 1;
Near-infrared probe bogey 3 is frame-like and is crossed on the top of the carrying of tested sheet material and moving-member 2;
Near-infrared probe height adjusting member 5 is suspended in the upper face of on near-infrared probe bogey 3 and adjustment direction perpendicular to worktable 1; Distance measuring equipment 4 and near-infrared probe 6 are arranged on to obtain it to adjustment highly on near-infrared probe height adjusting member 5, and the detection direction of distance measuring equipment 4 and near-infrared probe 6 points to the upper face of worktable 1;
Tested sheet material carrying and the moving-member of moving-member 2 are provided with clamping device 9;
The front end of worktable 1 upper surface is provided with feeding platform 11, the top of feeding platform 11 is provided with camera 8, the rear end of worktable 1 upper surface is provided with flotation-dividing part, described flotation-dividing part is made up of the first vertical rod 12-1 and the second vertical rod 12-2, first vertical rod 12-1 and the second vertical rod 12-2 is fixed on near-infrared probe bogey 3 and lower end height and clamping device 9 highly adapt, worktable 1 upper face at the first vertical rod 12-1 and the second vertical rod 12-2 front end place respectively has a sliding channel 14, the lower end of sliding channel 14 is provided with outlet on the side elevation of worktable 1,
Described host computer and tested sheet material carry the transmission being connected order and data with the moving-member of moving-member 2, distance measuring equipment 4, near-infrared probe height adjusting member 5, camera 8 and clamping device 9.
Method of the present invention comprises the steps: one, tested sheet material 10 is placed on feeding platform 11, first utilizes camera 8 to judge tested sheet material 10 surface whether existing defects, and detects tested sheet material 10 width and length; If have defect just to reject, defective sheet material is not had to send into clamping device 9;
Two, host computer is according to the width adjustment clamping device 9 of the tested sheet material 10 recorded, and completes clamping work; The distance automatically between regulating near-infrared probe 6 and tested sheet material by distance measuring equipment 4 and near-infrared probe height adjusting member 5, detects the single-point of tested sheet material 10 to complete near-infrared probe 6;
Three, the carrying of tested sheet material controls tested sheet material 10 with moving-member 2 and transversely moves with longitudinal both direction, realizes near-infrared probe 6 to the traversal of tested sheet material 10 and information acquisition;
Four, the spectroscopic data collected is transferred on host computer and carries out data analysis, classifies according to actual conditions; Then the carrying of tested sheet material controls tested sheet material 10 with moving-member 2 and moves to flotation-dividing part, clamping device 9 unclamps, promote the landing of tested sheet material 10 by the first vertical rod 12-1 or the second vertical rod 12-2, tested sheet material 10 completes sorting by entering different sliding channels 14.
The present invention adopts single-point type detector to analyze solid wood board performance, can be realized the collection of solid wood board surface data dynamically, neatly, analyze sheet material mechanical property and distribution character thereof by design traversal device; By loading the distance measuring sensor between near-infrared probe and solid wood board, controlling near-infrared probe height, realizing probe constant with tested sheet material spacing, realize the accuracy that spectral information is expressed.For improving detection speed, utilize camera to judge solid wood board whether existing defects, if existing defects, its performance will not meet the demands, and this solid wood board will directly be rejected, and this process will improve detection speed.Camera can determine solid wood board width and length, for the accuracy and runtime of clamping device and near-infrared probe collection provides reference quantity simultaneously.For improving detection speed, directly connect computer and carry out the process of subsequent optical spectrum information, the detection of robotization reduces artificial wasting time and energy.
The present invention by distance measuring sensor control solid wood board and near-infrared probe spacing constant, realize spectral effective collection; By traveling through whole solid wood board and arranging sampling interval, complete the high precision spectral analysis of solid wood board performance dynamic flexible, draw sheet material mechanical property and distribution character thereof; By camera pre-service, near infrared collection solid wood board dimension information is provided while can reject defect sheet material, realize the preliminary judgement of solid wood board performance.Such device can not realize this function on the market at present.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.Fig. 2 is the structural representation of tested sheet material carrying and moving-member 2 in the present invention.Fig. 3 is the structural representation of clamping device 9.
Embodiment
Embodiment one: illustrate present embodiment below in conjunction with Fig. 1 to Fig. 3.Present embodiment device comprises worktable 1, the carrying of tested sheet material and moving-member 2, near-infrared probe bogey 3, flotation-dividing part, distance measuring equipment 4, near-infrared probe height adjusting member 5, near-infrared probe 6, camera 8, clamping device 9, feeding platform 11 and host computer;
Tested sheet material carrying is made up of two longitudinal rails, cross slide way and moving-members with moving-member 2, and longitudinal rail and cross slide way fixed and arranged are on the upper face of worktable 1;
Near-infrared probe bogey 3 is frame-like and is crossed on the top of the carrying of tested sheet material and moving-member 2;
Near-infrared probe height adjusting member 5 is suspended in the upper face of on near-infrared probe bogey 3 and adjustment direction perpendicular to worktable 1; Distance measuring equipment 4 and near-infrared probe 6 are arranged on to obtain it to adjustment highly on near-infrared probe height adjusting member 5, and the detection direction of distance measuring equipment 4 and near-infrared probe 6 points to the upper face of worktable 1;
Tested sheet material carrying and the moving-member of moving-member 2 are provided with clamping device 9;
The front end of worktable 1 upper surface is provided with feeding platform 11, the top of feeding platform 11 is provided with camera 8, the rear end of worktable 1 upper surface is provided with flotation-dividing part, described flotation-dividing part is made up of the first vertical rod 12-1 and the second vertical rod 12-2, first vertical rod 12-1 and the second vertical rod 12-2 is fixed on near-infrared probe bogey 3 and lower end height and clamping device 9 highly adapt, worktable 1 upper face at the first vertical rod 12-1 and the second vertical rod 12-2 front end place respectively has a sliding channel 14, the lower end of sliding channel 14 is provided with outlet on the side elevation of worktable 1,
Described host computer and tested sheet material carry the transmission being connected order and data with the moving-member of moving-member 2, distance measuring equipment 4, near-infrared probe height adjusting member 5, camera 8 and clamping device 9.
Camera 8 is fixed on the upper surface of worktable 1 by camera bracket 7.
Tested sheet material carrying adopts Timing Belt straight line module to carry displacement platform with the moving-member of moving-member 2.
Clamping device 9 is the grip blocks 15 be processed into by two pieces, left and right aluminium alloy plate, and two stepper motors (output shaft is leading screw) and two overlap a few major part composition such as slide rail, slide blocks.Transmission principle is after two stepper motors receive control signal, lead screw shaft rotate, the nut in lead screw shaft will move forward and backward, and two nuts be screwed with left and right grip block respectively together with, left and right grip block can seesaw with nut.The model of most I clamping about the 2cm of clamping device 9, the maximum model clamping about 16cm, applicability is strong.
Near-infrared probe height adjusting member 5 comprises stepper motor, motor cabinet, slide rail, slide block, probe socket and a L shape back up pad.The major function of this part is carried exactly and is supported probe, and can adjust probe height, and its transmission principle is the same with clamping device.On the framework that its overall architecture builds at aluminium alloy extrusions, solid and reliable.
Embodiment two: illustrate present embodiment below in conjunction with Fig. 3.Present embodiment specifically defines described grip block 15 and is made up of clamping plate 15-1, block 15-2 and gusset 15-3 compared with embodiment one, clamping plate 15-1 is fixed on the upper surface of gusset 15-3, block 15-2 is fixed on one end of clamping plate 15-1 length direction, and gusset 15-3 is fixed on the slide block of clamping device 9.Setting like this, two pieces of grip block 15 arranged opposite, the inside surface of block 15-2 achieves the end face location of tested sheet material 10.
Embodiment three: illustrate present embodiment below in conjunction with Fig. 3.The surface that present embodiment specifically defines clamping plate 15-1, baffle plate 15-2 compared with embodiment two is provided with resilient rubbber cushion 15-4.Setting like this, reduces mechanicalness and damages.
Embodiment four: illustrate present embodiment below in conjunction with Fig. 1 to Fig. 3.The method of present embodiment comprises the steps:
One, tested sheet material 10 is placed on feeding platform 11, first utilizes camera 8 to judge tested sheet material 10 surface whether existing defects, and detect tested sheet material 10 width and length; If have defect just to reject, defective sheet material is not had to send into clamping device 9;
Two, host computer is according to the width adjustment clamping device 9 of the tested sheet material 10 recorded, and completes clamping work; The distance automatically between regulating near-infrared probe 6 and tested sheet material by distance measuring equipment 4 and near-infrared probe height adjusting member 5, detects the single-point of tested sheet material 10 to complete near-infrared probe 6;
Three, the carrying of tested sheet material controls tested sheet material 10 with moving-member 2 and transversely moves with longitudinal both direction, realizes near-infrared probe 6 to the traversal of tested sheet material 10 and information acquisition;
Four, the spectroscopic data collected is transferred on host computer and carries out data analysis, calculates sheet material mechanical property and distribution character thereof, and classifies according to actual conditions; Then the carrying of tested sheet material controls tested sheet material 10 with moving-member 2 and moves to flotation-dividing part, clamping device 9 unclamps, promote the landing of tested sheet material 10 by the first vertical rod 12-1 or the second vertical rod 12-2, tested sheet material 10 completes sorting by entering different sliding channels 14.
Embodiment five: it is wood floors that present embodiment specifically defines tested sheet material 10 compared with embodiment four.
Claims (8)
1. utilize the device of near infrared spectrum on-line checkingi solid wood board performance, it is characterized in that it comprises worktable (1), the carrying of tested sheet material and moving-member (2), near-infrared probe bogey (3), flotation-dividing part, distance measuring equipment (4), near-infrared probe height adjusting member (5), near-infrared probe (6), camera (8), clamping device (9), feeding platform (11) and host computer;
Tested sheet material carrying is made up of two longitudinal rails, cross slide way and moving-members with moving-member (2), and longitudinal rail and cross slide way fixed and arranged are on the upper face of worktable (1);
Near-infrared probe bogey (3) is for frame-like and be crossed on the carrying of tested sheet material and the top of moving-member (2);
Near-infrared probe height adjusting member (5) is suspended in the upper face of on near-infrared probe bogey (3) and adjustment direction perpendicular to worktable (1); Distance measuring equipment (4) and near-infrared probe (6) are arranged on to obtain it to adjustment highly on near-infrared probe height adjusting member (5), and the detection direction of distance measuring equipment (4) and near-infrared probe (6) points to the upper face of worktable (1);
Tested sheet material carrying and the moving-member of moving-member (2) are provided with clamping device (9);
The front end of worktable (1) upper surface is provided with feeding platform (11), the top of feeding platform (11) is provided with camera (8), the rear end of worktable (1) upper surface is provided with flotation-dividing part, described flotation-dividing part is made up of the first vertical rod (12-1) and the second vertical rod (12-2), first vertical rod (12-1) and the second vertical rod (12-2) are fixed on near-infrared probe bogey (3) upper and lower end height and clamping device (9) and highly adapt, worktable (1) upper face at the first vertical rod (12-1) and the second vertical rod (12-2) front end place respectively has a sliding channel (14), the lower end of sliding channel (14) is provided with outlet on the side elevation of worktable (1),
Described host computer and tested sheet material carry the transmission being connected order and data with the moving-member of moving-member (2), distance measuring equipment (4), near-infrared probe height adjusting member (5), camera (8) and clamping device (9).
2. the device utilizing near infrared spectrum on-line checkingi solid wood board performance according to claim 1, is characterized in that camera (8) is fixed on the upper surface of worktable (1) by camera bracket (7).
3. the device utilizing near infrared spectrum on-line checkingi solid wood board performance according to claim 1, is characterized in that the carrying of tested sheet material adopts Timing Belt straight line module to carry displacement platform with the moving-member of moving-member (2).
4. the on-line near infrared spectroscopy analysis that utilizes according to claim 1,2 or 3 detects the device of solid wood board performance, it is characterized in that grip block (15) that clamping device (9) is processed into by two pieces, left and right aluminium alloy plate, two stepper motors two overlap slide rail and slide block forms.
5. the device utilizing on-line near infrared spectroscopy analysis to detect solid wood board performance according to claim 4, it is characterized in that described grip block (15) is made up of clamping plate (15-1), block (15-2) and gusset (15-3), clamping plate (15-1) are fixed on the upper surface of gusset (15-3), block (15-2) is fixed on one end of clamping plate (15-1) length direction, and gusset (15-3) is fixed on the slide block of clamping device (9).
6. the device utilizing on-line near infrared spectroscopy analysis to detect solid wood board performance according to claim 5, the surface that it is characterized in that clamping plate (15-1), baffle plate (15-2) is provided with resilient rubbber cushion (15-4).
7. application rights requires that the on-line near infrared spectroscopy analysis that utilizes of device described in 1 to 6 detects the method for solid wood board performance, it is characterized in that it comprises the steps: one, tested sheet material (10) is placed on feeding platform (11), first utilize camera (8) to judge tested sheet material (10) surface whether existing defects, and detect tested sheet material (10) width and length; If have defect just to reject, defective sheet material is not had to send into clamping device (9);
Two, host computer is according to the width adjustment clamping device (9) of the tested sheet material 10 recorded, and completes clamping work; The distance automatically between regulating near-infrared probe (6) and tested sheet material by distance measuring equipment (4) and near-infrared probe height adjusting member (5), detects the single-point of tested sheet material (10) to complete near-infrared probe (6);
Three, the carrying of tested sheet material controls tested sheet material (10) with moving-member (2) and transversely moves with longitudinal both direction, realizes near-infrared probe (6) to the dynamic flexible ground traversal of tested sheet material (10) and information acquisition;
Four, the spectroscopic data collected is transferred on host computer and carries out data analysis, calculates sheet material mechanical property and distribution character thereof, classifies according to actual conditions; Then the carrying of tested sheet material controls tested sheet material (10) with moving-member (2) and moves to flotation-dividing part, clamping device (9) unclamps, promote tested sheet material (10) landing by the first vertical rod (12-1) or the second vertical rod (12-2), tested sheet material (10) completes sorting by entering different sliding channels (14).
8. the method utilizing on-line near infrared spectroscopy analysis to detect solid wood board performance according to claim 7, is characterized in that tested sheet material (10) is wood floors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510828800.7A CN105486660B (en) | 2015-11-24 | 2015-11-24 | Utilize the apparatus and method of near infrared spectrum on-line checking solid wood board performance |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510828800.7A CN105486660B (en) | 2015-11-24 | 2015-11-24 | Utilize the apparatus and method of near infrared spectrum on-line checking solid wood board performance |
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| Publication Number | Publication Date |
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| CN105486660A true CN105486660A (en) | 2016-04-13 |
| CN105486660B CN105486660B (en) | 2018-03-27 |
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Cited By (7)
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| CN106225750A (en) * | 2016-08-31 | 2016-12-14 | 湖北嘉辐达节能科技有限公司 | A kind of glass cotton end product quality on-Line Monitor Device |
| CN107187826A (en) * | 2017-05-31 | 2017-09-22 | 嘉善宝狐服饰有限公司 | One kind moves material device |
| CN107282464A (en) * | 2017-05-31 | 2017-10-24 | 嘉善宝狐服饰有限公司 | A kind of sheet material test moves material device |
| CN108196029A (en) * | 2018-03-02 | 2018-06-22 | 绵阳金泰机械设备制造有限公司 | A kind of metal parts defect detecting system and restorative procedure |
| CN109291158A (en) * | 2018-11-20 | 2019-02-01 | 佛山市爱巢装饰材料实业有限公司 | A kind of plank detects prosthetic appliance automatically |
| CN112649397A (en) * | 2020-12-24 | 2021-04-13 | 苏州泽达兴邦医药科技有限公司 | Method and system for analyzing quality of traditional Chinese medicinal materials by utilizing near infrared spectrum |
| CN112782147A (en) * | 2020-12-23 | 2021-05-11 | 浙江溯源光科技有限公司 | Raman probe with adjustable measurement depth |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106225750A (en) * | 2016-08-31 | 2016-12-14 | 湖北嘉辐达节能科技有限公司 | A kind of glass cotton end product quality on-Line Monitor Device |
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| CN109291158A (en) * | 2018-11-20 | 2019-02-01 | 佛山市爱巢装饰材料实业有限公司 | A kind of plank detects prosthetic appliance automatically |
| CN112782147A (en) * | 2020-12-23 | 2021-05-11 | 浙江溯源光科技有限公司 | Raman probe with adjustable measurement depth |
| CN112782147B (en) * | 2020-12-23 | 2022-03-08 | 浙江溯源光科技有限公司 | Raman probe with adjustable measurement depth |
| CN112649397A (en) * | 2020-12-24 | 2021-04-13 | 苏州泽达兴邦医药科技有限公司 | Method and system for analyzing quality of traditional Chinese medicinal materials by utilizing near infrared spectrum |
| CN112649397B (en) * | 2020-12-24 | 2021-12-10 | 苏州泽达兴邦医药科技有限公司 | Method and system for analyzing quality of traditional Chinese medicinal materials by utilizing near infrared spectrum |
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