CN107764766A - A kind of chilled aquatic products escaping gas analyzer - Google Patents
A kind of chilled aquatic products escaping gas analyzer Download PDFInfo
- Publication number
- CN107764766A CN107764766A CN201711297857.4A CN201711297857A CN107764766A CN 107764766 A CN107764766 A CN 107764766A CN 201711297857 A CN201711297857 A CN 201711297857A CN 107764766 A CN107764766 A CN 107764766A
- Authority
- CN
- China
- Prior art keywords
- air accumulator
- optical
- aquatic products
- ray
- fibre
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000523 sample Substances 0.000 claims abstract description 23
- 230000003287 optical effect Effects 0.000 claims abstract description 18
- 239000013307 optical fiber Substances 0.000 claims abstract description 11
- 238000006243 chemical reaction Methods 0.000 claims abstract description 8
- 125000006850 spacer group Chemical group 0.000 claims description 14
- 238000010521 absorption reaction Methods 0.000 claims description 10
- 238000002474 experimental method Methods 0.000 claims description 5
- 238000012545 processing Methods 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 4
- 230000005284 excitation Effects 0.000 claims description 3
- 230000008676 import Effects 0.000 claims 1
- GETQZCLCWQTVFV-UHFFFAOYSA-N trimethylamine Chemical compound CN(C)C GETQZCLCWQTVFV-UHFFFAOYSA-N 0.000 description 6
- 238000001514 detection method Methods 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 241000157468 Reinhardtius hippoglossoides Species 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 241000251468 Actinopterygii Species 0.000 description 1
- 235000003283 Pachira macrocarpa Nutrition 0.000 description 1
- 241000269908 Platichthys flesus Species 0.000 description 1
- 241001083492 Trapa Species 0.000 description 1
- 235000014364 Trapa natans Nutrition 0.000 description 1
- 238000004320 controlled atmosphere Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- DNJIEGIFACGWOD-UHFFFAOYSA-N ethanethiol Chemical compound CCS DNJIEGIFACGWOD-UHFFFAOYSA-N 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000000796 flavoring agent Substances 0.000 description 1
- 235000019634 flavors Nutrition 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 238000013507 mapping Methods 0.000 description 1
- 235000013372 meat Nutrition 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 230000007096 poisonous effect Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 235000020995 raw meat Nutrition 0.000 description 1
- 230000011514 reflex Effects 0.000 description 1
- 235000009165 saligot Nutrition 0.000 description 1
- 230000001953 sensory effect Effects 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
Classifications
-
- 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
- G01N21/3504—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for analysing gases, e.g. multi-gas analysis
Landscapes
- 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 Or Analysing Materials By Optical Means (AREA)
Abstract
The present invention provides a kind of chilled aquatic products escaping gas analyzer, and the freshness protection package for filling fillet connects with air accumulator；The outside of air accumulator is provided with light source, and the outer wall of air accumulator has attached fibre-optical probe, and fibre-optical probe is connected with concentrator, and optical signal caused by gas molecule is passed to concentrator by fibre-optical probe by optical fiber；Optical signal is passed to by photophore by optical fiber, photophore, which is assembled, collects the ray that light source is launched, and the ray for assembling collection is imported in monochromatic device assembly, monochromatic device assembly injects ray for detecting transmitted intensity, and the optical signal conversion of ray is become the detector of electric signal, detector is connected with display, display spectrogram.Different wavelength can be produced under the irradiation of infrared light supply using different gas, so as to there is different absworption peaks, the judgement quickly completed to aquatic products quality is realized in the section of wavelength where having absworption peak caused by gas so as to judge the structure of gas molecule.
Description
Technical field
The present invention relates to chilled aquatic products detection field, more particularly to a kind of chilled aquatic products escaping gas analyzer.
Background technology
At present, with increase of the people to aquatic products demand, the quality of aquatic products quality is into people's critical concern
Problem.Aquatic products quality not only influences the flavor of aquatic products in itself after changing, but also may be putrid and deteriorated, causes food
Product security problems.Usually we judge that aquatic products quality quality mainly passes through sensory evaluation, Physicochemical test and microorganism
Experiment etc., but operating procedure is complex on the whole, wastes time and energy for these three methods, it is impossible to judge aquatic products product faster
The change of matter.With the progress of scientific research technology, the change of aquatic products gas content in storage is studied also into judgement water
The important method of product quality quality.But the research now to this respect is limited, shortage can on-line checking and monitoring gas contain
Measure the instrument of change, it is therefore necessary to go to research and develop a kind of chilled aquatic products escaping gas analyzer, to realize rapidly
Complete the judgement to aquatic products quality.
The content of the invention
In order to overcome above-mentioned deficiency of the prior art, the present invention provides a kind of chilled aquatic products escaping gas measure
Instrument, including：The freshness protection package of fillet is filled, the air accumulator connected with freshness protection package；The outside of air accumulator is set inside oriented air accumulator
Excitation energy is provided, testing molecule is produced the light source of light absorbs, the outer wall of air accumulator has attached fibre-optical probe, fibre-optical probe connection
There is concentrator, optical signal caused by gas molecule is passed to concentrator by fibre-optical probe by optical fiber；By optical fiber by optical signal
Photophore is passed to, photophore, which is assembled, collects the ray that light source is launched, and will assemble the monochromatic device assembly of ray importing collected
In, monochromatic device assembly injects ray for detecting transmitted intensity, and the optical signal conversion of ray is become the detection of electric signal
Device, detector are connected with display, display spectrogram.
Preferably, monochromatic device assembly includes：Including：Framework, grating and concavees lens；
Grating and concavees lens are arranged on inside framework；
Framework is provided with entrance slit and exit slit；Entrance slit and exit slit are located at the same side of framework；It is incident
Spacer is provided between slit and exit slit, spacer of the grating between entrance slit and exit slit is set, interval
The length of section is more than the length of grating；
Concavees lens are set away from spacer.
Preferably, the center line of concavees lens, the center line of spacer and the center line of grating are on same straight line.
Preferably, gas valve is provided between freshness protection package and air accumulator
Preferably, air accumulator includes：Air accumulator top and air accumulator bottom；
At least one light source is provided with close to air accumulator top；
At least one light source is provided with close to air accumulator bottom.
Preferably, air accumulator top has sticked at least one fibre-optical probe；
Air accumulator bottom has sticked at least one fibre-optical probe.
Preferably, detector includes：Signal processor, optical-electrical converter and signal amplifier；
Optical-electrical converter is used to the optical signal conversion for receiving ray becoming electric signal；
Signal amplifier is used to electric signal being amplified processing；
Signal processor is linear for the change of electric signal and sample concentration to be handled, and is surveyed and drawn according to experiment
Absorption peak position, intensity and the shape of infrared spectrogram, using group's vibration frequency and the relation of molecular structure, determine absorption band
Ownership, confirm group or chemical bond contained in molecule, and then estimate the structure of molecule.
As can be seen from the above technical solutions, the present invention has advantages below：
The transmission medium that chilled aquatic products escaping gas analyzer uses is optical fiber, ensures efficiency of transmission.Chilled aquatic products
Product escaping gas analyzer is combined made gas sensing device with Spectrum Absorption Principle using optical fiber, utilizes
The principle of Lambert-Beer laws obtains optical signal from this device, then converts optical signals into electric signal by converter；
Chilled aquatic products escaping gas analyzer can produce different wavelength using different gas under the irradiation of infrared light supply, from
And having different absworption peaks, the section of wavelength where having absworption peak caused by gas is real so as to judge the structure of gas molecule
Now quickly complete the judgement to aquatic products quality.
Brief description of the drawings
In order to illustrate more clearly of technical scheme, the required accompanying drawing used in description will be made below simple
Ground introduction, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for ordinary skill
For personnel, on the premise of not paying creative work, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is chilled aquatic products escaping gas analyzer overall schematic.
Embodiment
To enable goal of the invention, feature, the advantage of the present invention more obvious and understandable, will use below specific
Embodiment and accompanying drawing, the technical scheme protected to the present invention are clearly and completely described, it is clear that implementation disclosed below
Example is only part of the embodiment of the present invention, and not all embodiment.Based on the embodiment in this patent, the common skill in this area
All other embodiment that art personnel are obtained under the premise of creative work is not made, belong to the model of this patent protection
Enclose.
The present embodiment provides a kind of chilled aquatic products escaping gas analyzer, as shown in figure 1, including：Fill fillet
Freshness protection package 1, the air accumulator 2 connected with freshness protection package 1；The outside of air accumulator 2 sets the oriented inside of air accumulator 2 to provide excitation energy, makes
Testing molecule produces the light source 3 of light absorbs, and the outer wall of air accumulator 2 has attached fibre-optical probe 4, and fibre-optical probe 4 is connected with concentrator
5, optical signal caused by gas molecule is passed to concentrator 5 by fibre-optical probe 4 by optical fiber；5 are transmitted optical signal by optical fiber
To photophore 6, photophore 6, which is assembled, collects the ray that light source 3 is launched, and will assemble the monochromatic device assembly 9 of ray importing collected
In, monochromatic device assembly 9 injects ray for detecting transmitted intensity, and the optical signal conversion of ray is become the detection of electric signal
Device 12, detector 12 are connected with display 13, the spectrogram of display 13.
In the present embodiment, monochromatic device assembly 9 includes：Including：Framework 15, grating 7 and concavees lens 8；Grating 7 and concavees lens 8
It is arranged on inside framework 15；Framework 15 is provided with entrance slit 10 and exit slit 11；Entrance slit 10 and exit slit 11 are set
In the same side of framework 15；Spacer 16 is provided between entrance slit 10 and exit slit 11, grating 7 is close to the He of entrance slit 10
Spacer 16 between exit slit 11 is set, and the length of spacer 16 is more than the length of grating 7；Concavees lens 8 are away from spacer
16 are set.
The center line of concavees lens 8, the center line of spacer 16 and the center line of grating 7 are on same straight line.
In the present embodiment, gas valve 14. is provided between freshness protection package 1 and air accumulator 2
In the present embodiment, air accumulator 2 includes：Air accumulator top 21 and air accumulator bottom 22；Set close to air accumulator top 21
There is at least one light source 3；At least one light source 3 is provided with close to air accumulator bottom 22.In the present embodiment, air accumulator top 21 sticks
There is at least one fibre-optical probe 4；Air accumulator bottom 22 has sticked at least one fibre-optical probe 4.
In the present embodiment, detector 12 includes：Signal processor, optical-electrical converter and signal amplifier；Optical-electrical converter
For the optical signal conversion for receiving ray to be become into electric signal；Signal amplifier is used to electric signal being amplified processing；Signal
Processor is for linear by the change of electric signal and sample concentration processing, according to the surveyed and drawn infrared spectrogram of experiment
Peak position, intensity and shape are absorbed, using group's vibration frequency and the relation of molecular structure, the ownership of absorption band is determined, confirms
Contained group or chemical bond in molecule, and then estimate the structure of molecule.
Specifically, using the change for detecting quality during turbot controlled atmosphere as example, first open fill big water chestnut first
The gas valve 14 of the freshness protection package 1 of flounder sliced meat, makes freshness protection package 1 be connected with air accumulator 2, opens the light at the both ends of air accumulator 2 respectively
Source 3, optical signal caused by gas molecule is passed into concentrator 5 by fibre-optical probe 4, then concentrator 5 by optical fiber by light
Signal passes to photophore 6, and the effect of photophore 6 is to assemble to collect the ray that light source is launched, and it then is imported into monochromator group
In part 9；Light beam is first mapped on concavees lens 8 by entrance slit 10 into monochromatic device assembly 9, and concavees lens 8 reflect the light onto front
Grating 7 on focus on, grating 7 reflected the light onto by its reflex can be formed on concavees lens 8 it is equal with entrance slit 10
Capable light beam, by rotating shutter 7, the light of various wavelength can transmit from exit slit 11 in order in operation
Go out；Light beam is projected into detector 12 by exit slit 11, and detector 12 detects this monochromatic intensity, and this light is believed
Number conversion becomes electric signal and amplifies this electric signal；The change of electric signal and sample concentration are linear, finally by showing
Device 13 shows and recorded that certain display 13 may also set up data processing software and A/D screens.Detector 12 is according to experiment institute
Absorption peak position, intensity and the shape of the infrared spectrogram of mapping, using group's vibration frequency and the relation of molecular structure, it is determined that
The ownership of absorption band, confirm group or chemical bond contained in molecule, and then estimate the structure of molecule.In chilled aquatic products gas
Adjust it is fresh-keeping during gas that may be present have CO2, trimethylamine etc., wherein CO2Infrared absorption have two peaks, in face and face
Outside sweep vibration frequency is equal, in 667cm-1Place, asymmetric stretch 2349cm-1；The infrared absorption peak of trimethylamine is complex,
Mainly in 2988cm-1、2959cm-1、2881cm-1、2836cm-1、2787cm-1、1640cm-1、1472cm-1、1266cm-1、
1205cm-1、1103cm-1、1031cm-1And 816cm-1There is absworption peak at place, is colourless gas under trimethylamine normal temperature, there is fish raw meat stench,
Water, ethanol and ether are dissolved in, it is inflammable, it is poisonous, then illustrate that turbot fillet are putrid and deteriorated at this moment when there is the gas.
Each embodiment is described by the way of progressive in this specification, what each embodiment stressed be and other
The difference of embodiment, identical similar portion refers to mutually between each embodiment.
The foregoing description of the disclosed embodiments, professional and technical personnel in the field are enable to realize or using the present invention.
A variety of modifications to these embodiments will be apparent for those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, it is of the invention
The embodiments shown herein is not intended to be limited to, and is to fit to and principles disclosed herein and features of novelty phase one
The most wide scope caused.
Claims (7)
- A kind of 1. chilled aquatic products escaping gas analyzer, it is characterised in that including：The freshness protection package (1) of fillet is filled, with guarantor The air accumulator (2) of fresh bag (1) connection；Outside set of air accumulator (2) provides excitation energy inside oriented air accumulator (2), make to be measured Molecule produces the light source (3) of light absorbs, and the outer wall of air accumulator (2) has attached fibre-optical probe (4), and fibre-optical probe (4) is connected with poly- Optical signal caused by gas molecule is passed to concentrator (5) by light device (5), fibre-optical probe (4) by optical fiber；(5) optical fiber is passed through Optical signal is passed into photophore (6), photophore 6, which is assembled, collects the ray that light source (3) is launched, and will assemble the ray collected Import in monochromatic device assembly (9), monochromatic device assembly (9) injects ray for detecting transmitted intensity, and the optical signal of ray Conversion becomes the detector (12) of electric signal, and detector (12) is connected with display (13), display (13) spectrogram.
- 2. chilled aquatic products escaping gas analyzer according to claim 1, it is characterised in thatMonochromatic device assembly (9) includes：Including：Framework (15), grating (7) and concavees lens (8)；It is internal that grating (7) and concavees lens (8) are arranged on framework (15)；Framework (15) is provided with entrance slit (10) and exit slit (11)；Entrance slit (10) and exit slit (11) are located at frame The same side of body (15)；Spacer (16) is provided between entrance slit (10) and exit slit (11), grating (7) is close to incident narrow The spacer (16) stitched between (10) and exit slit (11) is set, and the length of spacer (16) is more than the length of grating (7)；Concavees lens (8) are set away from spacer (16).
- 3. chilled aquatic products escaping gas analyzer according to claim 2, it is characterised in thatThe center line of concavees lens (8), the center line of spacer (16) and the center line of grating (7) are on same straight line.
- 4. chilled aquatic products escaping gas analyzer according to claim 1, it is characterised in thatGas valve (14) is provided between freshness protection package (1) and air accumulator (2).
- 5. chilled aquatic products escaping gas analyzer according to claim 1, it is characterised in thatAir accumulator 2 includes：Air accumulator top (21) and air accumulator bottom (22)；At least one light source (3) is provided with close to air accumulator top (21)；At least one light source (3) is provided with close to air accumulator bottom (22).
- 6. chilled aquatic products escaping gas analyzer according to claim 5, it is characterised in thatAir accumulator top (21) has sticked at least one fibre-optical probe (4)；Air accumulator bottom (22) has sticked at least one fibre-optical probe (4).
- 7. chilled aquatic products escaping gas analyzer according to claim 1, it is characterised in thatDetector (12) includes：Signal processor, optical-electrical converter and signal amplifier；Optical-electrical converter is used to the optical signal conversion for receiving ray becoming electric signal；Signal amplifier is used to electric signal being amplified processing；Signal processor is linear for the change of electric signal and sample concentration to be handled, and is surveyed and drawn according to experiment infrared Absorption peak position, intensity and the shape of spectrogram, using group's vibration frequency and the relation of molecular structure, determine returning for absorption band Category, confirm group or chemical bond contained in molecule, and then estimate the structure of molecule.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711297857.4A CN107764766A (en) | 2017-12-08 | 2017-12-08 | A kind of chilled aquatic products escaping gas analyzer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711297857.4A CN107764766A (en) | 2017-12-08 | 2017-12-08 | A kind of chilled aquatic products escaping gas analyzer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107764766A true CN107764766A (en) | 2018-03-06 |
Family
ID=61277607
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711297857.4A Pending CN107764766A (en) | 2017-12-08 | 2017-12-08 | A kind of chilled aquatic products escaping gas analyzer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107764766A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101042340A (en) * | 2007-04-30 | 2007-09-26 | 西安交通大学 | Detection method for Optical-fiber transmitting infrared absorption type methane gas |
| CN102890067A (en) * | 2012-09-17 | 2013-01-23 | 江苏惠通集团有限责任公司 | Methanol gasoline quick detector based on near infrared rays |
| WO2013079806A1 (en) * | 2011-12-02 | 2013-06-06 | Jyväskylän Yliopisto | Method and device for determining gas concentration |
| CN204613090U (en) * | 2015-04-22 | 2015-09-02 | 厦门海荭兴科技股份有限公司 | Portable full spectrum Rapid food safety inspection instrument |
| CN105717060A (en) * | 2016-01-26 | 2016-06-29 | 黑龙江工程学院 | Method for measuring compositions and concentration of gas |
| CN106018315A (en) * | 2016-05-17 | 2016-10-12 | 天津大学 | Engine emission gas analyzer based on Rowland grating |
| CN207540968U (en) * | 2017-12-08 | 2018-06-26 | 山东商业职业技术学院 | A kind of chilled aquatic products escaping gas analyzer |
-
2017
- 2017-12-08 CN CN201711297857.4A patent/CN107764766A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101042340A (en) * | 2007-04-30 | 2007-09-26 | 西安交通大学 | Detection method for Optical-fiber transmitting infrared absorption type methane gas |
| WO2013079806A1 (en) * | 2011-12-02 | 2013-06-06 | Jyväskylän Yliopisto | Method and device for determining gas concentration |
| CN102890067A (en) * | 2012-09-17 | 2013-01-23 | 江苏惠通集团有限责任公司 | Methanol gasoline quick detector based on near infrared rays |
| CN204613090U (en) * | 2015-04-22 | 2015-09-02 | 厦门海荭兴科技股份有限公司 | Portable full spectrum Rapid food safety inspection instrument |
| CN105717060A (en) * | 2016-01-26 | 2016-06-29 | 黑龙江工程学院 | Method for measuring compositions and concentration of gas |
| CN106018315A (en) * | 2016-05-17 | 2016-10-12 | 天津大学 | Engine emission gas analyzer based on Rowland grating |
| CN207540968U (en) * | 2017-12-08 | 2018-06-26 | 山东商业职业技术学院 | A kind of chilled aquatic products escaping gas analyzer |
Non-Patent Citations (1)
| Title |
|---|
| 李双喜: ""光谱吸收式光纤气体传感器分辨率研究"", 《安徽科技学院学报》, vol. 20, no. 02, 30 April 2006 (2006-04-30), pages 28 - 30 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106596437B (en) | Atmospheric NO 3 Free radical concentration on-line measuring system and method | |
| CN105424631B (en) | A kind of hypersensitivity nitrogen oxides measuring system based on UV, visible light wave band absorption spectrum | |
| CN101308090B (en) | Fire field multi- parameter laser wavelength modulated spectrum detection method and apparatus | |
| CN102519916B (en) | Method and device for on-line detecting concentration of pesticide | |
| CN101458234B (en) | Portable power transformer fault diagnostic apparatus | |
| CN202404020U (en) | Photoacoustic spectrum detection device for gas content detection | |
| CN109283141B (en) | Exhaled gas spectrum detection system and method capable of removing water vapor interference | |
| CN101932926A (en) | Quantum efficiency measuring device and quantum efficiency measuring method | |
| CN103512860A (en) | Method for monitoring dissolved gas in transformer oil based on terahertz wave photonic crystal fibers | |
| CN103115879B (en) | Method for measuring content of chlorophyll a, chlorophyll b and carotenoid in plant live leaf by utilizing absorption spectrum | |
| CN101498690A (en) | Online fault monitoring system for power transformer | |
| CN107064044B (en) | Method and device for rapidly detecting polyphenol content in tea extract | |
| CN105987864A (en) | Integrating sphere embedded photo-thermal interferential aerosol scattering and absorbing synchronous measurement device | |
| CN207540968U (en) | A kind of chilled aquatic products escaping gas analyzer | |
| EP1184662B1 (en) | Interference filter transmission wavelength scanning photometer | |
| CN203011831U (en) | Instrument for liquid component analysis | |
| CN204044070U (en) | Pesticide residue determination device | |
| CN103063595B (en) | Detection device of ripeness degree of grapes and application thereof | |
| CN205958442U (en) | Double -light -path water environment on - line measuring device based on spectral measurement technique | |
| CN107894395A (en) | A kind of Aerosol Extinction Coefficients measuring method based on Research on Cavity Ring Down Spectroscopy | |
| CN107764766A (en) | A kind of chilled aquatic products escaping gas analyzer | |
| RU2014111553A (en) | DEVICE AND METHOD FOR IDENTIFICATION OF REFRIGERANTS | |
| CN206505011U (en) | Air NO3Number of free radical on-line measurement system | |
| CN107132197B (en) | Method and device for detecting total acid content of vinegar | |
| CN106769702B (en) | A kind of measuring device and measurement method of powdered rubber |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |