CN101706384B - Gas supply method and device - Google Patents
Gas supply method and device Download PDFInfo
- Publication number
- CN101706384B CN101706384B CN2009101540063A CN200910154006A CN101706384B CN 101706384 B CN101706384 B CN 101706384B CN 2009101540063 A CN2009101540063 A CN 2009101540063A CN 200910154006 A CN200910154006 A CN 200910154006A CN 101706384 B CN101706384 B CN 101706384B
- Authority
- CN
- China
- Prior art keywords
- light
- gas
- light source
- detector
- ozone
- 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.)
- Active
Links
Images
Landscapes
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The invention discloses a gas supply method, which comprises the following steps that: a, light emitted by a light source penetrates an original gas containing oxygen in a conversion unit, wherein the oxygen is converted into ozone under the action of light with specific wavelength, and the gas after conversion is introduced into a measurement unit; b, the light with the specific wavelength in the light emitted by the light source is filtered, the rest light penetrates the gas in the measurement unit, is received by a first detector and is converted into electric signals, and an analysis module processes the measured electric signals to obtain the ozone concentration; and c, the gas after the conversion is discharged outside the measurement unit, and the gas of which the ozone concentration is known is supplied to the external. The invention also discloses a device for implementing the method. The device has the advantages of simple structure, low cost, accurate measurement and the like, and the method and the device are applied to ozone gas supply.
Description
Technical field
The present invention relates to the gas supply, particularly the conversion of ozone with and spectral analysis.
Background technology
Generally include the ozone automatic analyzer in the monitoring sub-station of auto-monitor of surrounding air quality system, the ozone automatic analyzer utilizes spectroscopy measurement to go out the content of ozone in the atmosphere.Elongated along with service time, light source and the electronic devices and components in the ozone automatic analyzer can wear out, each position component also can change, and this just needs use O
3Gas is calibrated the ozone automatic analyzer, guarantees the accuracy of measuring.
O
3Because its extremely strong oxidisability can not use steel cylinder to carry out canned and storage usually, so,, the ozone automatic analyzer need use ozone generating apparatus to transform out O at the scene when being calibrated
3Gas.O
3The generation of gas needs like lower device:
1, O
3Generation device, normally used method have point discharge method or ceramic discharge method or ultraviolet light chemistry method etc.Specifically can be referring to patent CN2427509Y, CN2466135Y, CN2670334Y.
Point discharge method or ceramic discharge method are the most frequently used ozone generating method, can produce the ozone concentration of very high (reaching 50%), are mainly used in industry and go up generation ozone.But these methods are not suitable for producing the O of normal concentration
3, because the O of its generation
3The concentration precision is relatively poor, and can produce minor N O
2, be applied to timing signal and can produce certain interference.
Ultraviolet light chemistry method can produce O high-precision, low concentration
3, be fit to very much be applied to O
3Demarcate.Ultraviolet light chemistry ratio juris is the UV-irradiation O of ultraviolet source emission
2, a small amount of O
2Can absorb the characteristic ultraviolet light of 185nm wavelength, be converted into O
3, suc as formula (1).
O
2+hv
185nm→O
3 (1)
2, ozone photometer.The ozoniferous concentration accuracy in order to guarantee need feed the ozone that transforms out in the ozone photometer, utilizes spectral technique to record the concentration of ozone.The ozone photometer can be referring to patent CN2921827Y.
Ozone photometer measurement principle is to utilize O
3Absorption to the ultraviolet light of 254nm wavelength obtains O
3Concentration, ultimate principle is the Beer-Lambert relational expression, i.e. formula (2),
I＝I
0·e
-αLC (2)
Wherein, I
0Be light source intensity, I is the light intensity of passing behind the tested gas, and L is a light path, and C is the concentration of tested gas, and α is the absorption coefficient of tested gas at specific wavelength.
Environment temperature and pressure can influence the density of kind gas, and the ultraviolet light that ozone is absorbed changes.According to formula (2), the influence of account temperature, pressure, then (on average) concentration computing formula does,
Wherein, P is the pressure of appearance gas, and T is the temperature of appearance gas.
In the prior art, above-mentioned ozone generating apparatus and ozone photometer all are splits, have many deficiencies, as:
1, complex structure need provide two gas compartments, is respectively applied for to produce and measure ozone.Need two ultraviolet sources of launching different characteristic wavelength ultraviolet light in ozone generating apparatus and the ozone photometer: the emission wavelength of ozone generating apparatus inner light source must comprise λ=185nm characteristic spectrum, O
2Absorb this wavelength characteristic spectrum and can produce O
3, and the emission wavelength of light source need comprise λ=254nm characteristic spectrum in the ozone photometer, but need to get rid of λ=185nm characteristic spectrum, avoid producing in the measuring process O
3
2, operation inconvenience is in order to obtain light source intensity I in the ozone photometer
0, at first need in photometric gas compartment, feed the air at zero point and (promptly not comprise O
3Air), the light intensity that detector records promptly is light source intensity I
0And, also to repeat aforesaid operations behind the some cycles at interval.
3, measuring accuracy is lower, owing to be not to monitor in the photometer light source intensity in real time to change, therefore, the light source intensity that prestores that utilizes when at every turn measuring might not be a light source intensity real when measuring, and has influenced measuring accuracy.
4, cost is higher, and when adopting ultraviolet irradiation technique, the ozone reforming unit needs two different ultraviolet sources with the ozone photometer, and the price of ultraviolet source is higher, has improved the cost of device.
Summary of the invention
In order to solve above-mentioned deficiency of the prior art, the invention provides the higher gas supply method of a kind of gas concentration indication accuracy, and accurate, simple in structure, the lower-cost gas supply device of a kind of measurement.
For realizing the foregoing invention purpose, the present invention adopts following technical scheme:
A kind of gas supply method may further comprise the steps:
The light that a, light source send passes the original gas that includes oxygen in the conversion unit, and wherein, oxygen is converted into ozone under the effect of special wavelength light;
Gas after the conversion feeds in the measuring unit;
The light that b, said light source send is filtered the light of said specific wavelength, passes the gas in the measuring unit, is received by first detector, and converts electric signal to;
Analysis module is handled the electric signal that records, and obtains ozone concentration;
Gas after c, the conversion is discharged from measuring unit, to the known gas of external world's supply ozone concentration.
As preferably, said specific wavelength is λ=185nm.
As preferably, the light that light source sends passes the length that light that the length of gas sends less than light source passes the gas between the filtering apparatus and first detector when arriving the optical filtering module.
As preferably, in step b, first detector records the light intensity at wavelength X=254nm place.
As preferably, in said converting unit and measuring unit, feed at wavelength X=185nm place ozone free the zero gas that transforms, do not have absorption at λ=254nm place, first detector records light that light source at this moment the sends light intensity at wavelength X=254nm place.
As preferably, in said measuring unit, feeding at λ=254nm place does not have the zero gas that absorbs, and first detector records light that light source at this moment the sends light intensity at wavelength X=254nm place.
As preferably, second detector is set, be used to monitor the light intensity that light source sends light, the light that light source sends passes the length that light that the length of gas sends less than light source passes the gas between the optical filtering module and first detector when arriving second detector.
As preferably, the light intensity at said second detector monitors wavelength X=254nm place.
In order to realize said method; The invention allows for a kind of like this gas supply device; Comprise light source, optical filtering module, conversion unit, measuring unit; Be communicated with through gas circuit between conversion unit and measuring unit, on the said conversion unit air intake opening be set, said measuring unit comprises measuring chamber, first detector, exhausr port and analysis module; The shared light source of conversion unit and measuring unit, the light that said light source sends pass conversion unit and produce ozone, after the light that said light source sends passes optical filtering module, measuring unit, arrive said first detector.
Further, said conversion unit and measuring unit are in the both sides of light source.
As preferably, also be provided with second detector that the monitoring light source sends the light intensity of light, its output terminal connects analysis module, and second detector arrives the distance of optical filtering module less than first detector to the distance of light source.
The present invention compared with prior art has following beneficial effect:
1, simple in structure, maintainable good
The present invention can be designed to one with conversion unit and measuring unit; Can only need a light source (or a detector): the special wavelength light in the light source emergent light is an ozone with oxygen conversion, and light source emergent light (or after being filtered specific wavelength) is used to measure ozone concentration.
2, measure accurately
The introducing of second detector can be monitored light source intensity in real time, and is used for follow-up Measurement and analysis, has further improved the accuracy of measuring.
Second detector can be monitored light source intensity in real time and change.
The measured signal of second detector can also be transferred to analysis module, and the driving voltage of FEEDBACK CONTROL ultraviolet source is stablized the output intensity of ultraviolet source, thereby improves ozoniferous precision.
3, cost is lower
Can need not to design two independently gas compartments, need not long breather line, only need a light source (or only needing a detector), these have all reduced cost.
Description of drawings
Fig. 1 is the structural representation of gas supply device in the embodiment of the invention 1;
Fig. 2 is the schematic flow sheet of gas supply method in the embodiment of the invention 1;
Fig. 3 is the structural representation of gas supply device in the embodiment of the invention 2;
Fig. 4 is the structural representation of gas supply device in the embodiment of the invention 3;
Fig. 5 is the structural representation of gas supply device in the embodiment of the invention 4.
Embodiment
Below in conjunction with embodiment, the present invention is done further detailed description.
Embodiment 1:
As shown in Figure 1, a kind of calibrating gas feeding mechanism is used to provide the ozone gas, and said feeding mechanism comprises light source 11, conversion unit 1 and measuring unit 2.
Said conversion unit 1 is provided with air intake opening 12, and inside is provided with light source 11, as adopting mercury lamp, comprises wavelength X=185nm, 254nm in the light of light source 11 emissions.
Said measuring unit 2 connects conversion unit 1, and the gas in the converting unit 1 can freely flow in the measuring unit 2.Measuring unit 2 is provided with exhausr port 25, and set inside has optical filtering module 21, gas compartment 22, first detector 23, analysis module 24.Optical filtering module 21 will filter the light of wavelength X=185nm that light source sends, can adopt optical filter.The spacing L of optical filtering module 21 and light source 11
1Less, like 1mm, L
1Much smaller than the distance L between the optical filtering module 21 and first detector 23.
Therefore the present invention only needs a light source, a gas compartment, need not long breather line, thereby whole apparatus structure is become simply, is convenient to safeguard, has also reduced cost simultaneously.
A kind of calibrating gas Supply Method, as shown in Figure 2 in order to the ozone gas to be provided, said method comprising the steps of:
A, with zero gas (transform at wavelength X=185nm place ozone free, at the gas of λ=254nm place nothing absorption; Like nitrogen) feed in said conversion unit 1 and the measuring unit 2, the light intensity at wavelength X=254nm place that first detector 23 records is the light intensity I at wavelength X=254nm that light source 11 sends
0, with light intensity I
0 Analysis module 24 is advanced in storage.
The original gas that includes oxygen gets in the conversion unit 1 through air intake opening 12 with the flow of confirming;
The light that light source 11 sends passes the original gas in the conversion unit 1, comprises wavelength X=185nm, 254nm in the light that light source sends; Oxygen in the original gas is converted into ozone under the effect of specific wavelength λ=185nm light;
Gas after the conversion gets in the gas compartment 22 in the measuring unit 2;
In conversion process, (light intensity is I to the light of wavelength X=254nm that light source 11 sends
0) owing to the absorption of ozone in the conversion unit 1 be attenuated into
, C
1Concentration for ozone in the conversion unit 1; L
1Distance for light source 11 and optical filtering module 21;
B, the light that passes behind the conversion unit 1 pass optical filtering module 21, are filtered said specific wavelength λ=185nm, become measuring light;
Measuring light is passed the gas after transforming in the gas compartment 22 in the measuring unit 2, is received in the light intensity I at wavelength X=254nm place by ozone absorption and decay back by first detector 23, and converts electric signal into.Analysis module 24 utilizes the Beer-Lambert relational expression to obtain following computing formula, thereby obtains the concentration C of ozone in the measuring unit 2 interior gases:
In above-mentioned concentration computing formula, the concentration C of ozone in the conversion unit 1
1Close usually with ozone concentration C in the measuring unit 2, and L
1L is in a small amount relatively, therefore can ignore, and ozone concentration C is:
C, the gas that includes ozone are discharged from measuring unit 2 through exhausr port 25, thereby to the known gas of external world's supply ozone concentration value.
Embodiment 2:
As shown in Figure 3; A kind of calibrating gas feeding mechanism; Be used to provide the ozone gas; Different with embodiment 1 is: second detector 13 also is set in conversion unit 1, is used for monitoring in real time the light intensity that light source 11 sends light at wavelength X=254nm place, second detector 13 to the distance of light source 11 less than the distance of first detector 13 to optical filtering module 21.
When in conversion unit 1, measuring unit 2, feeding zero gas (transform at wavelength X=185nm place ozone free, at the gas of λ=254nm place nothing absorption, like nitrogen), the light intensity that first detector 23 records is the light intensity I of wavelength X=254nm that light source 11 sends
0, the light intensity that second detector 13 records is I
1, light intensity I
0With light intensity I
1Between definite relation be: I
0=kI
1Thereby, obtain scale-up factor k, and store in the analysis module 24.
A kind of calibrating gas Supply Method in order to the ozone gas to be provided, said method comprising the steps of:
A, the original gas that includes oxygen get in the conversion units 1 through air intake opening 12 with the flow of confirming;
The light that light source 11 sends passes the original gas in the conversion unit 1, comprises wavelength X=185nm, 254nm in the light that light source sends; Oxygen in the original gas is converted into ozone under the effect of specific wavelength λ=185nm light;
Gas after the conversion gets in the gas compartment 22 in the measuring unit 2;
In conversion process, the light of wavelength X=254nm that light source 11 sends owing to the absorption of ozone in the conversion unit 1 be attenuated into
, C
1Concentration for ozone in the conversion unit 1; L
1For the distance of light source 11 and optical filtering module 21, very little usually, like 1mm, L
1Much smaller than the distance L between the optical filtering module 21 and first detector 23.
The light of wavelength X=254nm that light source 11 sends is received by second detector 13 after passing the ozone in the conversion unit 1, and the light intensity that second detector 13 receives does
, L
2Be the distance of second detector 13 to light source, very little usually, like 1mm, L
2Much smaller than the distance L between the optical filtering module 21 and first detector 23.
Therefore, through the light intensity that second detector 13 removes to monitor in real time wavelength X=254nm that light source 11 sends, saved and fed zero gas (in order to obtain the light intensity I of wavelength X=254nm that light source 11 sends
0) trouble, solved the deficiency that can not monitor light source intensity in real time, improved the accuracy that ozone concentration is measured.
B, the light that passes behind the conversion unit 1 pass optical filtering module 21, are filtered said specific wavelength λ=185nm, become measuring light;
Measuring light is received in the light intensity I at wavelength X=254nm place by first detector 23, and converts electric signal into after passing the gas after transforming in the gas compartment 22 in the measuring unit 2.The relational expression of the light intensity I that the ozone concentration C and first detector receive in the measuring unit 2 as shown in the formula,
Ozone concentration C in the conversion unit 1
1The light intensity I that receives with second detector 13
2Relational expression as shown in the formula,
So, by top two formulas and relational expression I
0=kI
1Can obtain:
In above-mentioned concentration computing formula, the concentration C of ozone in the conversion unit 1
1Close usually with ozone concentration C in the measuring unit 2, and L
1, L
2L is in a small amount relatively, therefore can ignore C
1L
1And C
1L
2, ozone concentration C is:
C, the gas that includes ozone are discharged from measuring unit 2 through exhausr port 25, thereby to the known gas of external world's supply ozone concentration value.
Embodiment 3:
As shown in Figure 4, a kind of calibrating gas feeding mechanism is used to provide the ozone gas; Different with embodiment 2 is: exhausr port 14 is set on conversion unit 1; Like this, a gas part that produces in the conversion unit 1 is passed in the measuring unit 2, is used for measuring the concentration value that transforms ozone in the gas of back; Another part is then discharged through exhausr port 14, thereby to the known gas of external world's supply ozone concentration value.
A kind of calibrating gas Supply Method, in order to the ozone gas to be provided, different with embodiment 2 is, in step c, the gas after the conversion is discharged from conversion unit 1 through exhausr port 14, thereby to the known gas of external world's supply ozone concentration value.
Embodiment 4:
As shown in Figure 5, a kind of calibrating gas feeding mechanism is used to provide the ozone gas, and said feeding mechanism comprises light source 11, is in the conversion unit 1 and the measuring unit 2 of light source 11 both sides.
Said conversion unit 1 is provided with air intake opening 12, exhausr port 14.
Said measuring unit 2 is provided with air intake opening 26, exhausr port 25, is provided with first detector 23, analysis module 24.Said exhausr port 14 is communicated with air intake opening 26.
A kind of calibrating gas Supply Method in order to the ozone gas to be provided, said method comprising the steps of:
A, with in the said measuring unit 2 of zero gas (not having the gas that absorbs at λ=254nm place) feeding like nitrogen, the light intensity at wavelength X=254nm place that first detector 23 records is the light intensity I at wavelength X=254nm that light source 11 sends
0, with light intensity I
0 Analysis module 24 is advanced in storage.
The original gas that includes oxygen gets in the conversion unit 1 through air intake opening 12 with the flow of confirming;
The light that light source 11 sends passes the original gas in the conversion unit 1, and the light that light source 11 sends comprises wavelength X=185nm, 254nm; Oxygen in the original gas is converted into ozone under the effect of specific wavelength λ=185nm light;
Gas after the conversion gets in the measuring unit 2 through exhausr port 14, air intake opening 26;
The light that b, light source 11 send passes optical filtering module 21, is filtered said specific wavelength λ=185nm, becomes measuring light;
After measuring light is passed the gas in the measuring unit 2, received by first detector 23, obtain the light intensity I at wavelength X=254nm place, and convert electric signal into, analysis module 24 utilizes following computing formula (formula 3 in the background technology) to obtain the concentration value of ozone:
Wherein, I
0Represent measuring light light intensity at wavelength X=254nm place when getting into measuring unit 2, in step a, obtain.
Gas after c, the conversion is discharged from conversion unit 1 through exhausr port 14, thereby to the known gas of external world's supply ozone concentration value.
Supplemental instruction about the foregoing description: all adopt the absorption spectroanalysis technology in the foregoing description, can certainly adopt other spectral analysis technique, these technology all are the common practise of this area, repeat no more at this.
Above-mentioned embodiment should not be construed as the restriction to protection domain of the present invention.Key of the present invention is that the special wavelength light that utilizes light source to send acts on the oxygen in the original gas, changes into ozone; The light that light source sends passes the gas after the conversion, utilizes spectral technique to obtain the concentration value of ozone in the gas.Under the situation that does not break away from spirit of the present invention, any type of change that the present invention is made all should fall within protection scope of the present invention.
Claims (11)
1. gas supply method may further comprise the steps:
The light that a, light source send passes the original gas that includes oxygen in the conversion unit, and wherein, oxygen is converted into ozone under the effect of the light of specific wavelength;
Gas after the conversion feeds in the measuring unit;
The light that b, said light source send is filtered the light of said specific wavelength, passes the gas in the measuring unit, is received by first detector, and converts electric signal to;
Analysis module utilizes spectral technique to handle the electric signal that records, and obtains ozone concentration;
Gas after c, the conversion is discharged from measuring unit, to the known gas of external world's supply ozone concentration.
2. method according to claim 1 is characterized in that: said specific wavelength is λ=185nm.
3. method according to claim 1 and 2 is characterized in that: the light that light source sends passes the length that light that the length of gas sends less than light source passes the gas between the optical filtering module and first detector when arriving the optical filtering module.
4. method according to claim 1 and 2 is characterized in that: in step b, first detector records the light intensity at wavelength X=254nm place.
5. method according to claim 1 and 2; It is characterized in that: in said conversion unit and measuring unit, feed at wavelength X=185nm place ozone free the zero gas that transforms, do not have absorption at λ=254nm place, first detector records light that light source at this moment the sends light intensity at wavelength X=254nm place.
6. method according to claim 1 and 2 is characterized in that: in said measuring unit, feeding at λ=254nm place does not have the zero gas that absorbs, and first detector records light that light source at this moment the sends light intensity at wavelength X=254nm place.
7. method according to claim 1 and 2; It is characterized in that: second detector is set; Be used to monitor the light intensity of the identical light of optical wavelength that light source sends detects with said first detector, the light that light source sends passes the length that light that the length of gas sends less than light source passes the gas between the optical filtering module and first detector when arriving second detector.
8. method according to claim 7 is characterized in that: the light intensity at said second detector monitors wavelength X=254nm place.
9. gas supply device; Comprise light source, optical filtering module, conversion unit, measuring unit; Be communicated with through gas circuit between conversion unit and measuring unit, on the said conversion unit air intake opening be set, said measuring unit comprises measuring chamber, first detector, exhausr port and analysis module; The shared light source of conversion unit and measuring unit; The light that said light source sends passes conversion unit; After the light that light or the said light source of the light that said light source sends after passing conversion unit sends passes optical filtering module, measuring unit successively, arrive said first detector; The light of specific wavelength makes the oxygen conversion in the said conversion unit become ozone in the light that said light source sends; Said optical filtering module filters the light of said specific wavelength; Said analysis module utilizes spectral technique to handle the electric signal that said first detector records, and obtains ozone concentration.
10. device according to claim 9 is characterized in that: said conversion unit and measuring unit are in the both sides of light source.
11. device according to claim 9; It is characterized in that: when after light that said light source sends passes conversion unit, optical filtering module, measuring unit successively, being received by said first detector; Second detector of the light intensity of the light that the optical wavelength that detects with said first detector that is provided with also that the monitoring light source sends is identical; Its output terminal connects analysis module, and second detector arrives the distance of optical filtering module less than first detector to the distance of light source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101540063A CN101706384B (en) | 2009-09-30 | 2009-09-30 | Gas supply method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101540063A CN101706384B (en) | 2009-09-30 | 2009-09-30 | Gas supply method and device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101706384A CN101706384A (en) | 2010-05-12 |
| CN101706384B true CN101706384B (en) | 2012-02-22 |
Family
ID=42376622
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009101540063A Active CN101706384B (en) | 2009-09-30 | 2009-09-30 | Gas supply method and device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101706384B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104713841B (en) * | 2015-02-09 | 2017-05-24 | 中国石油大学(华东) | Self-calibration analyzer design method and device |
| CN110455734A (en) * | 2019-08-14 | 2019-11-15 | 合肥福瞳光电科技有限公司 | The monitoring method and its monitoring device of ozone concentration |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2108720U (en) * | 1992-01-07 | 1992-07-01 | 北京华联电器厂 | Oxidation reacting device excited by photochemical |
| CN1456493A (en) * | 2003-06-10 | 2003-11-19 | 武汉科技学院 | Ozone producing and eliminating method |
| CN2921827Y (en) * | 2006-07-21 | 2007-07-11 | 上海大学 | Portable photometer for measuring low concentration ozone |
| CN201527398U (en) * | 2009-09-30 | 2010-07-14 | 聚光科技(杭州)股份有限公司 | Gas supply device |
-
2009
- 2009-09-30 CN CN2009101540063A patent/CN101706384B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2108720U (en) * | 1992-01-07 | 1992-07-01 | 北京华联电器厂 | Oxidation reacting device excited by photochemical |
| CN1456493A (en) * | 2003-06-10 | 2003-11-19 | 武汉科技学院 | Ozone producing and eliminating method |
| CN2921827Y (en) * | 2006-07-21 | 2007-07-11 | 上海大学 | Portable photometer for measuring low concentration ozone |
| CN201527398U (en) * | 2009-09-30 | 2010-07-14 | 聚光科技(杭州)股份有限公司 | Gas supply device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101706384A (en) | 2010-05-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101144795B (en) | Impulse melting-flying time mass spectrometry for element | |
| CN110007026B (en) | Method and device for detecting trace nitrogen oxides in atmosphere | |
| Wurster | Measured Transition Probability for the First‐Positive Band System of Nitrogen | |
| CN201517991U (en) | Ozone concentration tester | |
| US4077774A (en) | Interferent-free fluorescence detection of sulfur dioxide | |
| CN201527398U (en) | Gas supply device | |
| CN102288574A (en) | Device and method for quantitatively analyzing concentration of multi-component oil fume | |
| CN101706384B (en) | Gas supply method and device | |
| CN110057496A (en) | A kind of pressure sensitive paint calibration system and calibration method suitable for multicomponent quenching gas | |
| US5922609A (en) | Method for infrared-optical determination of the concentration of at least one chemical analyte in a liquid sample | |
| CN202486056U (en) | Sulfur detector based on dielectric barrier discharge mode atomic emission spectroscopy | |
| CN104198461B (en) | Industrial process gas analyzer based on Raman effect | |
| KR20150115036A (en) | NO/NO2 multi-gases analyzer using non-dispersive ultraviolet method and NO/NO2 multi-gases analyzing method | |
| JPH01311254A (en) | Apparatus for measuring impurities in gas, electrode used in the same and use of the apparatus | |
| Schuster et al. | A cavity ring down/cavity enhanced absorption device for measurement of ambient NO 3 and N 2 O 5 | |
| CN206725444U (en) | A kind of online flue gas mercury analyzer based on Pressurized sample digestion | |
| CN104990883A (en) | Device for detecting gas concentration by spectrometer | |
| CN201343446Y (en) | Ozone generator capable of generating ozone with accurate concentration | |
| CN104807542A (en) | Glove box-based vacuum ultraviolet light source test system | |
| CN103163100A (en) | Gaseous element mercury detection method | |
| CN107064039A (en) | A kind of detection method of ozone monitoring sensor and its ozone concentration based on phase lock amplifying technology | |
| CN204128950U (en) | A kind of measuring instrument measuring low concentration mercury | |
| CN202149879U (en) | Multicomponent oil-smoke concentration quantitative analyzer | |
| JPH0933429A (en) | Ozone densitometer | |
| CN212364040U (en) | Optical filter for high-precision measurement of gas concentration |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: HANGZHOU FOCUSED PHOTONICS ENVIRONMENTAL-PROTECTIN Effective date: 20120313 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20120313 Address after: Hangzhou City, Zhejiang province Binjiang District 310052 shore road 760 Co-patentee after: Hangzhou Juguang Environmental Protection Technology Co.,Ltd. Patentee after: Focused Photonics (Hangzhou) Inc. Address before: Hangzhou City, Zhejiang province Binjiang District 310052 shore road 760 Patentee before: Focused Photonics (Hangzhou) Inc. |
|
| ASS | Succession or assignment of patent right |
Owner name: WUXI ZHONGKE OPTOELECTRONIC TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: FOCUSED PHOTONICS (HANGZHOU) INC. Effective date: 20120823 Free format text: FORMER OWNER: HANGZHOU FOCUSED PHOTONICS ENVIRONMENTAL-PROTECTING TECHNOLOGY CO., LTD. Effective date: 20120823 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 310052 HANGZHOU, ZHEJIANG PROVINCE TO: WUXI, JIANGSU PROVINCE |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20120823 Address after: Jiangsu province Wuxi City Linghu District Road No. 200 China IOT International Innovation Park C block 11 layer Patentee after: WUXI CAS PHOTONICS CO., LTD. Address before: Hangzhou City, Zhejiang province Binjiang District 310052 shore road 760 Patentee before: Focused Photonics (Hangzhou) Inc. Patentee before: Hangzhou Juguang Environmental Protection Technology Co.,Ltd. |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Gas supply method and device Effective date of registration: 20151201 Granted publication date: 20120222 Pledgee: Agricultural Bank of China Limited by Share Ltd Wuxi science and Technology Branch Pledgor: WUXI CAS PHOTONICS CO., LTD. Registration number: 2015990001069 |
|
| PLDC | Enforcement, change and cancellation of contracts on pledge of patent right or utility model |