CN108007867A - A kind of Tail gas measuring remote sensing instrument calibrating installation - Google Patents
A kind of Tail gas measuring remote sensing instrument calibrating installation Download PDFInfo
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- CN108007867A CN108007867A CN201711268676.9A CN201711268676A CN108007867A CN 108007867 A CN108007867 A CN 108007867A CN 201711268676 A CN201711268676 A CN 201711268676A CN 108007867 A CN108007867 A CN 108007867A
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- 238000009434 installation Methods 0.000 title claims abstract description 20
- 238000005259 measurement Methods 0.000 claims abstract description 86
- 230000003287 optical effect Effects 0.000 claims abstract description 23
- 230000007246 mechanism Effects 0.000 claims abstract description 16
- 239000012780 transparent material Substances 0.000 claims abstract description 16
- 239000000463 material Substances 0.000 claims description 6
- 230000008450 motivation Effects 0.000 claims 1
- 239000007789 gas Substances 0.000 description 61
- 238000002474 experimental method Methods 0.000 description 7
- 230000008859 change Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 230000004323 axial length Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009738 saturating Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 229910052594 sapphire Inorganic materials 0.000 description 1
- 239000010980 sapphire Substances 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012795 verification Methods 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
-
- 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
- G01N2021/1793—Remote sensing
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- 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 relates to a kind of Tail gas measuring remote sensing instrument calibrating installation, including standard can body, the at least two measurement chambers extended along the longitudinal direction that can be separately in when in use on the optical path of Tail gas measuring remote sensing instrument are provided with standard can body, each measurement chamber is set and along perpendicular to rectilinear direction in the front-back direction or circumferencial direction arranged for interval independently of one another, the rear and front end for measuring chamber is blocked by the fixation transparent material layer for being capable of printing opacity, calibrating installation further includes the shadow shield for being arranged at standard can body front side and/or rear side, shadow shield is driven by shadow shield driving mechanism and can be blocked and the optical path and get out of the way the optical path.The present invention solves the problems, such as to need to cause calibrating efficiency low the multiple inflation/deflation of standard gas cylinders in the prior art.
Description
Technical field
The present invention relates to a kind of Tail gas measuring remote sensing instrument calibrating installation.
Background technology
Tail gas measuring remote sensing instrument is the long range light varience according to caused by automobile exhaust contaminant come directly to car tail
A kind of measuring apparatus of gas concentration measurement, it has the advantages that not influence automobile normal running, its basic operation principle is：By
The host of remote sensing instrument send it is a branch of jaywalk it is infrared（It is ultraviolet）Light, when automobile by when, receiving terminal receive it is red（It is purple）Outside
The spectral intensity and feature of light can change, and this change indicates gas to be measured（Such as：CO、CO2、HC、NO）Concentration.
But whether remote sensing instrument is accurate, it is necessary to which special instrument examines it using its measurement result after a period of time
It is fixed.Chinese patent CN103234972B discloses a kind of " remote vehicle emissions instrument Special calibration device ", which includes
Standard gas cylinders.Standard gas cylinders include the cavity of a both sides opening, and both sides aperture position should be able to make light path by the way that two openings are set
The Moveable lid body for blocking opening is equipped with, air inlet and gas outlet are provided with cavity.In use, the calibrating installation is put
Among the light path of remote vehicle emissions instrument, when the Moveable lid body on gas tank both sides is opened, light that remote sensing instrument is sent is from tank body
Cavity passes through, and so represents that automobile has not gone through, and when the Moveable lid body on gas tank both sides is closed, light path cannot pass through, so
On the one hand can be arrived with simulated automotive, in addition Moveable lid body can also seal gas tank, so can be by air inlet by standard
Gas is filled with gas tank, by the intake of oxygen sensor examination criteria gas, when being passed through Standard Gases in standard gas cylinders completely
During body, Moveable lid body is at this moment opened, simulated automotive has already been through, and starts to detect, in the characteristic of the moment calibrating gas of detection
Do not change, record the calibrating gas value of moment, compared with the calibrating gas value in standard gas cylinders, both more connect value
The calibration accuracy of nearly explanation remote sensing instrument is higher, when both value differences illustrate the not competent calibrating of remote sensing instrument away from excessive more than specified value
Work.There are problems with for existing this calibrating installation：The calibrating gas to be measured have it is a variety of, this operation format, it is necessary to
Inflation/deflation frequently is carried out to standard gas cylinders, detection efficiency is low；In addition the instantaneous record calibrating gas value opened in Moveable lid body,
Also simply the characteristic of calibrating gas is not change in theory for this, if Moveable lid body opening is relatively slow, or standard gas cylinders week
The air-flow enclosed is more likely to cause the characteristic of calibrating gas to change in a jumble, causes the calibrating knot for mistake finally occur
Fruit.
The content of the invention
The purpose of the present invention is to provide a kind of Tail gas measuring remote sensing instrument calibrating installation, to solve to need in the prior art
The problem of causing calibrating efficiency low standard gas cylinders multiple inflation/deflation.
In order to solve the above technical problems, technical scheme is as follows：
Tail gas measuring remote sensing instrument calibrating installation, including standard can body, being provided with least two on standard can body can make
Used time is separately in the measurement chamber extended along the longitudinal direction on the optical path of Tail gas measuring remote sensing instrument, and each measurement chamber is only each other
Erect and put and along perpendicular to rectilinear direction in the front-back direction or circumferencial direction arranged for interval, measuring the rear and front end of chamber by can be saturating
The fixation transparent material layer closure of light, calibrating installation further include the shadow shield for being arranged at standard can body front side and/or rear side, hide
Tabula rasa is driven by shadow shield driving mechanism and can be blocked and the optical path and get out of the way the optical path.
The axial length of each measurement chamber is consistent.
Transparent material layer closure is fixed in the front end of each measurement chamber by same, and each rear end for measuring chamber is fixed saturating by same
Bright material layer closure.
Along perpendicular to circumferencial direction arranged for interval in the front-back direction, standard tank arrangement includes driving the standard each measurement chamber
Tank body is rotated to realize that each measurement chamber is separately in the standard can ontology-driven mechanism on the optical path.
The standard can ontology-driven mechanism is motor-driven mechanism.
Measurement chamber has five, and five measurement chambers are distributed uniformly and circumferentially.
Beneficial effects of the present invention are：In the present invention, measurement chamber has at least two, and each measurement chamber is set independently of one another,
The both ends of each measurement chamber are respectively by fixed transparent material layer at the same time, therefore measure the chamber that chamber is formed a closing, can be with
Different calibrating gas is filled with respectively in each measurement chamber, and one of measurement chamber is individually moved to Tail gas measuring remote sensing instrument
On optical path, which is measured, then other measurement chamber is individually moved into optical path, it is each to survey
Frequent inflation/deflation is not required in amount chamber, is conducive to improve calibrating efficiency, and in addition each measurement chamber is also to close, measurement result
From the influence of surrounding flow, the reliability of verification result ensure that；In action process, shadow shield blocks standard can body
Optical path, the process that simulating vehicle arrives, when standard can body acts in place, corresponding measurement chamber is located in optical path
Afterwards, then shadow shield is removed, simulating vehicle is moved into place.
Brief description of the drawings
Fig. 1 is the usage state diagram of one embodiment of the present of invention；
Fig. 2 is the view after shadow shield is removed in Fig. 1；
Fig. 3 is the structure diagram of Fig. 1 Plays tank bodies；
Fig. 4 is the side view of Fig. 3.
Embodiment
A kind of implementation of Tail gas measuring remote sensing instrument calibrating installation is for example shown in Fig. 1 ~ 4：Including standard tank bracket（In figure not
Show）, the standard can body 2 that pivot center extends along the longitudinal direction is rotatably equipped with standard tank bracket, and standard tank arrangement is also
The standard can ontology-driven mechanism rotated including driving standard can body（Not shown in figure）, standard can ontology-driven mechanism is electricity
Machine driving mechanism, standard can body are the metal derby of an integrative-structure, i.e. standard can body is made of same material, standard
Five measurement chambers extended along the longitudinal direction that along the circumferential direction uniform intervals are arranged, each axis for measuring chamber are offered on tank body
It is consistent to length, set independently of one another between each measurement chamber, in use, respectively measurement chamber can individually be in Tail gas measuring respectively
On the optical path 21 of remote sensing instrument 1, each measurement chamber can be achieved on optical path by the driving of standard can ontology-driven mechanism
Switching, the front end of standard can body fixed transparent material layer 20 before being fixedly installed, the rear end fixed setting of standard can body
Transparent material layer is fixed after having, forward and backward fixed transparent material layer is made by the acrylic board of monoblock in the present embodiment, preceding transparent
Material layer blocks the preceding accent of each measurement chamber at the same time, and rear transparent material layer blocks the rear accent of each measurement chamber at the same time, this each survey
Amount chamber forms the chamber being mutually independent, and five measurement chambers are referred to as 0# measurements chamber 15,1# measurements chamber 16,2# measures
Chamber 17,3# measurements chamber 18,4# measurement chambers 19,0# measure chamber and live air, 1# measurement chamber calibrating experiments are filled with when examining and determine and testing
When be filled with CO calibrating gas, whens 2# measurement chamber calibrating experiments, is filled with CO2 calibrating gas, and whens 3# measurement chamber calibrating experiments is filled with HC marks
Quasi- gas, 4# measurement chamber calibratings are filled with NO calibrating gas when testing, that is to say, that 0# measurement chambers are that live air measures chamber, 1 ~ 4#
Measure chamber and measure chamber for calibrating gas.
Air inlet and gas outlet are both provided with each measurement chamber.Standard tank arrangement is further included for air measurement chamber and respectively
The aerating device of calibrating gas measurement chamber inflation, aerating device include inflation gas circuit 8 and deflation gas circuit 4, and inflation gas circuit 8 includes gas
Bottle 11, pressure reducing valve 10, throttle valve 9, flowmeter 7 and air bag 6, deflation gas circuit 4 include two-position three-way valve 5, inflation gas circuit, deflation gas
Road is both connected to gas circuit and connects on block 22, and gas circuit connects block 22 and is fixed on standard tank bracket, rotates standard can body, each measurement
Chamber individually can connect block with gas circuit and dock, and realize that the air inlet of measurement chamber, gas outlet are docked with inflation gas circuit and deflation gas circuit respectively,
Measure at the air inlet of chamber and be both provided with solenoid valve at gas outlet（Or check valve）, to corresponding measurement chamber inflation.Calibrating installation
The shadow shield 25 being placed on front side of standard can body is further included, shadow shield is driven by shadow shield driving mechanism and can block the measurement
Light path includes shadow shield driving motor 26 with the optical path 21, shadow shield driving mechanism is got out of the way.Figure middle term 3 represents reflection
Mirror.
During experiment, the standard can body of standard tank arrangement is placed between remote sensing instrument and speculum 3, in five measurement chambers,
The live air of chamber filling is measured to air by aerating device, four additional fills CO, CO2, HC, NO calibrating gas respectively.With
Exemplified by CO gases calibrating remote sensing instrument, standard can ontology-driven mechanism driving standard can body rotates so that equipped with live air
Measurement chamber is located on the optical path of remote sensing instrument, and in standard can body rotation process, shadow shield blocks optical path, simulating vehicle
The process of arrival, after the measurement chamber equipped with live air is turned on optical path, removes shadow shield, remote sensing instrument reads background
Value, then rotates the measurement chamber equipped with CO and turns to record standard gas value on optical path, it is complete twice to repeat step experiment
The calibrating of paired remote sensing instrument CO measurements, same process can complete the calibrating that CO2, HC, NO are directed to remote sensing instrument.Entirely examined and determine
Journey, it is not necessary to frequently to measuring chamber inflation/deflation, need to only rotate standard can body and can be achieved, improve measurement accuracy and measurement
Efficiency, it also avoid influence of the surrounding environment to measurement result.A switching for measurement chamber is realized by rotating standard can body,
It can also ensure that calibrating gas homogeneous does not settle, can be reused in Different field.The axial length of each measurement chamber it is consistent and
Processing method is consistent, and the forward and backward accent for measuring chamber has the closure of same transparent material layer respectively, therefore respectively measures chamber in principle
Basic background value be consistent, but in order to avoid having a deviation between the basic background value of each measurement chamber, ensure more accurate survey
Accuracy of measurement, can also proceed as follows before background value is read：Air is filled in each measurement chamber, which needs not be inspection
Fixed scene air or Laboratory air, measure 0# measurements chamber, 1# measurements chamber, 2# measurements chamber, 3# measurements chamber, 4# respectively
Basic background value a0, a1, a2, a3, a4 of chamber are measured, 1# is measured chamber to the basic background value and 0# measuring appliance chambers of 4# measurement chambers
Basic background value difference, based on background value compensation rate be used for background caused by each canonical measure chamber individual chemical differences
The compensation of value：△ a1=a1-a0, △ a2=a2-a0, △ a3=a3-a0, △ a4=a4-a0, that is to say, that △ a1, △ a2, △ a3,
△ a4 can be with regard to the given value that has obtained or removing actually measured number after dispatching from the factory in experiment before dispatching from the factory
Value.0# measurements chamber filling live air during calibrating experiment, the background value for reading its background value A, 1# measurement chamber is A+ △ a1,
The background value of corresponding 2# measurements chamber is A+ △ a2, and the background value of 3# measurement chambers is A+ △ a3, and the background of 4# measurement chambers takes
It is worth for A+ △ a4.
Through actually measured, △ a1, △ a2, the value of △ a3 and △ a4 are all smaller, when calibration accuracy is of less demanding, can neglect
Slightly.Therefore in other embodiments of the invention, 1# measurements chamber, 2# measurements chamber, 3# measurements chamber, 4# measurement chambers can be designed to mark
Locating tab assembly chamber, i.e., just fill corresponding calibrating gas into corresponding measurement chamber, when examining and determine at the scene, only before product export
Live air need to be filled to 1# and measure chamber, aerating device can be not provided with this time, opened the air inlet of 0# measurement chambers, lead to
Placement a period of time is spent, 0# measurements chamber can be full of live air；According to the number of tested gas, the number for measuring chamber can also
It is two, three or other numbers；Transparent material layer can also be made of glass, GaF or sapphire material；Block each measurement chamber
The transparent material layer of forward and backward accent can also be independently arranged to each other；The material of standard can body can also be plastics or other
Material；Standard can body can also be assembled by multiple standard cans, i.e., the forward and backward accent of each measurement chamber is respectively by each corresponding to
Transparent material layer closure；Standard can ontology-driven mechanism can not also be set, and can pass through manual rotation's standard can body at this time
And corresponding measurement chamber is set to be located on optical path；Each measurement chamber can also linearly be intervally arranged, at this time standard can sheet
Body needs the switching being translatable to realize each measurement chamber on optical path；After shadow shield can also be arranged on standard can body
Side, or it is respectively provided with shadow shield in the front side of standard can body and rear side.
Claims (7)
1. a kind of Tail gas measuring remote sensing instrument calibrating installation, including standard can body, it is characterised in that：Set on standard can body
It is equipped with least two surveys extended along the longitudinal direction that can be separately in when in use on the optical path of Tail gas measuring remote sensing instrument
Chamber is measured, each chamber that measures is set and along perpendicular to rectilinear direction in the front-back direction or circumferencial direction arranged for interval, measurement independently of one another
The rear and front end of chamber is blocked by the fixation transparent material layer for being capable of printing opacity, and calibrating installation, which further includes, to be arranged on front side of standard can body
And/or the shadow shield of rear side, shadow shield are driven by shadow shield driving mechanism and can be blocked and the optical path and get out of the way the survey
Measure light path.
2. Tail gas measuring remote sensing instrument calibrating installation according to claim 1, it is characterised in that：The axial direction of each measurement chamber is long
Degree is consistent.
3. Tail gas measuring remote sensing instrument calibrating installation according to claim 1, it is characterised in that：The front end quilt of each measurement chamber
Same fixes transparent material layer closure, and transparent material layer closure is fixed in each rear end for measuring chamber by same.
4. the Tail gas measuring remote sensing instrument calibrating installation according to claim 1 ~ 3 any one, it is characterised in that：Each measurement
Along perpendicular to circumferencial direction arranged for interval in the front-back direction, standard tank arrangement includes driving the standard can body to rotate with reality chamber
Now respectively measurement chamber is separately in the standard can ontology-driven mechanism on the optical path.
5. Tail gas measuring remote sensing instrument calibrating installation according to claim 4, it is characterised in that：The standard can body drives
Motivation structure is motor-driven mechanism.
6. Tail gas measuring remote sensing instrument calibrating installation according to claim 4, it is characterised in that：Measurement chamber has five, and five
A measurement chamber is distributed uniformly and circumferentially.
7. Tail gas measuring remote sensing instrument calibrating installation according to claim 1, it is characterised in that：Standard can body is by same
Kind material is made.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2017108633951 | 2017-09-22 | ||
| CN201710863395 | 2017-09-22 |
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| Publication Number | Publication Date |
|---|---|
| CN108007867A true CN108007867A (en) | 2018-05-08 |
| CN108007867B CN108007867B (en) | 2024-01-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711268676.9A Active CN108007867B (en) | 2017-09-22 | 2017-12-05 | Calibrating device for tail gas detection remote sensing instrument |
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| Country | Link |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110501291A (en) * | 2019-09-19 | 2019-11-26 | 安徽岩芯光电技术有限公司 | A kind of detection device and detection method of tail gas remote-measuring equipment |
| CN117330533A (en) * | 2023-12-01 | 2024-01-02 | 广东省特种设备检测研究院顺德检测院 | Automatic-calibration intelligent carbon dioxide infrared gas analyzer and use method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1038166A (en) * | 1988-06-01 | 1989-12-20 | 哈特曼，布劳恩有限公司 | The calibrating installation of Nondispersive type infra-red photometer |
| US5591975A (en) * | 1993-09-10 | 1997-01-07 | Santa Barbara Research Center | Optical sensing apparatus for remotely measuring exhaust gas composition of moving motor vehicles |
| US20060047445A1 (en) * | 2004-08-25 | 2006-03-02 | Williams Mitchell J | System and method for calibrating remote emissions sensing instruments |
| CN202661459U (en) * | 2012-07-10 | 2013-01-09 | 浙江省计量科学研究院 | Standard gasoline vehicle instantaneous condition discharge detection device capable of simulating discharge of tail gas |
| CN103234972A (en) * | 2013-04-28 | 2013-08-07 | 北京市计量检测科学研究院 | Special calibrating apparatus for automobile exhaust telemeter |
| CN203929625U (en) * | 2014-03-13 | 2014-11-05 | 北京华清深空环保技术有限公司 | The automatic calibration device of motor-vehicle tail-gas Remote Sensing Testing System |
-
2017
- 2017-12-05 CN CN201711268676.9A patent/CN108007867B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1038166A (en) * | 1988-06-01 | 1989-12-20 | 哈特曼，布劳恩有限公司 | The calibrating installation of Nondispersive type infra-red photometer |
| US5591975A (en) * | 1993-09-10 | 1997-01-07 | Santa Barbara Research Center | Optical sensing apparatus for remotely measuring exhaust gas composition of moving motor vehicles |
| US20060047445A1 (en) * | 2004-08-25 | 2006-03-02 | Williams Mitchell J | System and method for calibrating remote emissions sensing instruments |
| CN202661459U (en) * | 2012-07-10 | 2013-01-09 | 浙江省计量科学研究院 | Standard gasoline vehicle instantaneous condition discharge detection device capable of simulating discharge of tail gas |
| CN103234972A (en) * | 2013-04-28 | 2013-08-07 | 北京市计量检测科学研究院 | Special calibrating apparatus for automobile exhaust telemeter |
| CN203929625U (en) * | 2014-03-13 | 2014-11-05 | 北京华清深空环保技术有限公司 | The automatic calibration device of motor-vehicle tail-gas Remote Sensing Testing System |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110501291A (en) * | 2019-09-19 | 2019-11-26 | 安徽岩芯光电技术有限公司 | A kind of detection device and detection method of tail gas remote-measuring equipment |
| CN117330533A (en) * | 2023-12-01 | 2024-01-02 | 广东省特种设备检测研究院顺德检测院 | Automatic-calibration intelligent carbon dioxide infrared gas analyzer and use method thereof |
| CN117330533B (en) * | 2023-12-01 | 2024-02-27 | 广东省特种设备检测研究院顺德检测院 | Automatic-calibration intelligent carbon dioxide infrared gas analyzer and use method thereof |
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| CN108007867B (en) | 2024-01-09 |
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Inventor after: Shang Xiaoyu Inventor after: Qin Guojun Inventor after: Zhang Qifeng Inventor after: Ye Xianfeng Inventor after: Zhang Haixia Inventor after: Jia Yang Inventor before: Qin Guojun Inventor before: Shang Xiaoyu Inventor before: Zhang Qifeng Inventor before: Ye Xianfeng Inventor before: Zhang Haixia Inventor before: Jia Yang |
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Effective date of registration: 20231214 Address after: 450000 No. 165 Nautical Middle Road, Erqi District, Zhengzhou City, Henan Province Applicant after: Henan Jiaoyuan Engineering Technology Group Co.,Ltd. Address before: 450000 room 901, unit 2, Huarui Purple Jade court, 333 Longhai Road, Zhongyuan District, Zhengzhou, Henan. Applicant before: ZHENGZHOU YEGEN ELECTRONIC TECHNOLOGY CO.,LTD. |
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