CN110455723B - Light splitting component adjustable structure for adjusting four paths of green light parallel emission and emitting device - Google Patents
Light splitting component adjustable structure for adjusting four paths of green light parallel emission and emitting device Download PDFInfo
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- CN110455723B CN110455723B CN201910739148.XA CN201910739148A CN110455723B CN 110455723 B CN110455723 B CN 110455723B CN 201910739148 A CN201910739148 A CN 201910739148A CN 110455723 B CN110455723 B CN 110455723B
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- 238000009434 installation Methods 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 abstract description 2
- 230000005484 gravity Effects 0.000 abstract 1
- 230000007246 mechanism Effects 0.000 description 6
- 239000000779 smoke Substances 0.000 description 4
- 230000003287 optical effect Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 229910001008 7075 aluminium alloy Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
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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
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/27—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands using photo-electric detection ; circuits for computing concentration
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
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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
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
- G01N2021/0106—General arrangement of respective parts
- G01N2021/0112—Apparatus in one mechanical, optical or electronic block
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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
- G01N2021/1793—Remote sensing
- G01N2021/1795—Atmospheric mapping of gases
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- Engineering & Computer Science (AREA)
- Mathematical Physics (AREA)
- Theoretical Computer Science (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Optics & Photonics (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
- Mounting And Adjusting Of Optical Elements (AREA)
Abstract
The invention relates to the technical field of motor vehicle remote sensing equipment, in particular to an adjustable structure of a light splitting assembly for adjusting four paths of green light to be emitted in parallel, which comprises a mounting column, a light splitting adjusting plate, a clamp, a spectroscope plate, a spectroscope, a wave plate mounting clamp, a wave plate mounting barrel and a wave plate; one side of the beam splitting adjusting plate is fixed on the mounting column through the holding clamp, the beam splitter plate is composed of a side plate and a fixing plate, the side part of the fixing plate is fixed on the side plate, two groove holes are formed in the side plate, the wave plate mounting holding clamp is located at the lower part of the beam splitter plate and fixed on one side of the beam splitting adjusting plate, the wave plate is mounted in the wave plate mounting cylinder, and the wave plate mounting cylinder is arranged in the wave plate mounting holding clamp. The device is based on the installation of the bottom plate, is supported by the upright post, ensures that the equipment is not influenced by external force, and the supporting point of the gravity center of the module acts under the equipment, so that the cantilever state can not be generated, and the vibration in the transportation and carrying process can not influence the light path.
Description
Technical Field
The invention relates to the technical field of motor vehicle tail gas remote sensing equipment, in particular to an adjustable structure of a light splitting assembly for adjusting four paths of green light to be emitted in parallel and a transmitting device.
Background
The motor vehicle tail gas light-tight smoke analysis module is an analysis module for green laser on-line remote measurement of motor vehicle tail gas in road surface driving. During measurement, the measuring module and the reflecting module are arranged on two sides of a measuring target, after the light path is adjusted, light rays are emitted in parallel after the light rays are acted by the parabolic reflecting mirror, and the emitted light rays pass through a lane and are received by the receiving module.
The opaque smoke analysis module of the original equipment is ten paths of light paths, each branch is arranged on a bottom plate, the bottom plate is vertically arranged and connected with the equipment frame, and when external equipment is acted by external force, very little deformation can be generated, and the deformation can also lead to the deflection of the light paths.
The ten-path branching has the defects that the whole equipment is too high, the equipment is too large and too heavy, the light path is complex, and the light path is unstable.
Disclosure of Invention
The invention aims to overcome the defects of the technology and provide an adjustable structure of a light splitting component for adjusting four paths of green light to be emitted in parallel.
The invention adopts the following technical scheme to realize the aim: a beam split subassembly adjustable structure for adjusting four routes green light parallel emission, its characterized in that: the device comprises a mounting column, a beam splitting adjusting plate, a holding clamp, a beam splitter plate, a beam splitter, a wave plate mounting holding clamp, a wave plate mounting barrel and a wave plate; one side of the beam splitting adjusting plate is fixed on the mounting column through the holding clamp, the beam splitter plate is composed of a side plate and a fixing plate, the side part of the fixing plate is fixed on the side plate, the beam splitter is mounted in a middle round hole of the fixing plate, two groove holes are formed in the side plate, the wave plate mounting holding clamp is located at the lower part of the beam splitter plate and fixed on one side of the beam splitting adjusting plate, the wave plate is mounted in the wave plate mounting cylinder, and the wave plate mounting cylinder is arranged in the wave plate mounting holding clamp and fastened through bolts.
Preferably, the two groove holes are respectively positioned at two sides of the fixed plate, and the connecting line of the axes of the two groove holes is circular.
Preferably, the both sides of erection column are equipped with the spacing groove respectively, the inboard of embracing the card be equipped with spacing groove complex lug, one side of beam split adjusting plate contains semi-circular, and its inboard center is equipped with the arc arch, the arc arch with the spacing groove cooperation, embracing the both ends of card through the bolt with the beam split adjusting plate is fixed.
Preferably, the fixing plate is located on a diagonal line of the side plate.
Preferably, the connecting line center point of the two slot-shaped holes is positioned at the center of the fixing plate.
Preferably, a lever mounting hole is fixed to the front of the side plate for mounting the lever.
An adjustable mechanism launching device, characterized in that: comprises an emission bottom plate, a laser, a total reflection assembly and at least one set of adjusting structure; the outlet end of the laser is opposite to the total reflection assembly, the total reflection assembly is positioned at one side of the light outlet end of the laser and is fixed on the emission bottom plate, and the total reflection assembly comprises a total reflection adjusting plate, a reflection adjusting plate and a total reflection mirror; one side of the total reflection adjusting plate is fixed at the bottommost part of the mounting column, the front side of the total reflection adjusting plate is provided with an adjusting groove, the back side of the reflection adjusting plate is provided with an adjusting protrusion matched with the adjusting groove, two sides of the reflection adjusting plate are fixed with the total reflection adjusting plate through bolts, and the total reflection mirror is fixed on the reflection adjusting plate; a wave plate mounting clamp, a wave plate mounting barrel and a wave plate are fixed on the upper part of the front side of the total reflection adjusting plate or on the side opposite to the laser; the adjusting structure is positioned at the upper part of the total reflection assembly and is arranged at equal intervals upwards along the mounting column.
Preferably, the cross section of the total reflecting mirror is isosceles right triangle.
Preferably, a tensioning bolt is fixed on the reflection adjusting plate, a pressing block is fixed at the end of the tensioning bolt, and the pressing block presses the total reflection mirror.
Compared with the prior art, the invention has the beneficial effects that four paths of light rays are required to be emitted in parallel when the motor vehicle tail gas opaque smoke analysis module measures, the emitted light passes through a lane and is received, the distance of the emitted light passing through the lane is up to 15 meters, the light emitting direction of the emission end module is required to be parallel, the emission end module can be adjusted in the horizontal and vertical directions, the adjustment of each path is not influenced, and the emission end module can be locked and cannot have micro motion after the adjustment is finished. The mechanism can ensure that the light-tight smoke analysis modules of the tail gas of the motor car are not mutually influenced when the light path is regulated, can realize independent regulation of the single module in the horizontal direction and the vertical direction, and is in a locking state after regulation.
The module is based on the bottom plate installation, supports with the stand, and bottom plate intensity guarantees that equipment does not receive external force influence, and module focus supporting point is used under in addition, can not produce the cantilever state, and vibration in the transportation handling can not produce the influence to the light path.
Drawings
FIG. 1 is a perspective view of the present invention;
FIG. 2 is a top view of the present invention;
FIG. 3 is a front view of the present invention;
FIG. 4 is a perspective view of a total reflection assembly of the present invention;
FIG. 5 is a perspective view of another direction of the total reflection assembly of the present invention
FIG. 6 is an application diagram of a transmitting device in the present invention;
FIG. 7 is a schematic view of the structure of the mounting post of the present invention;
FIG. 8 is a schematic view of the optical path of the present invention;
fig. 9 is another implementation of the optical path of the present invention.
Detailed Description
The following detailed description of the invention refers to the accompanying drawings and preferred embodiments. As shown in fig. 1-3, an adjustable structure of a light splitting assembly for adjusting four paths of green light parallel emission comprises a mounting column 1, a light splitting adjusting plate 2, a holding clamp 3, a light splitting plate 4, a light splitting plate 5, a wave plate mounting holding clamp 6, a wave plate mounting barrel 7 and a wave plate 8; one side of the beam split adjusting plate is fixed on the mounting column through the holding clamp, and in order to facilitate adjustment, as shown in fig. 7, limiting grooves 11 are respectively formed in two sides of the mounting column, and an annular clamping table is arranged at intervals for limiting the beam split adjusting plate, so that the distance between each set of adjustable structures is ensured. The inner side of the holding clamp is provided with a bump 31 matched with the limiting groove, and the bump on the side of the holding clamp can be clamped in the square limiting groove. And one side of the beam split adjusting plate comprises a semicircle, the center of the inner side of the beam split adjusting plate is provided with an arc-shaped bulge 21, the arc-shaped bulge is matched with the limit groove, as shown in fig. 2, the beam split adjusting plate can move left and right in the limit groove by taking the mounting column as the center, so that the beam split lens can be adjusted left and right, and finally the two ends of the clamping plate are fixed with the beam split adjusting plate through bolts.
The spectroscope plate is composed of a side plate 41 and a fixing plate 42, the side part of the fixing plate is fixed on the side plate, and the fixing plate is positioned on the diagonal line of the side plate. The spectroscope is installed in the middle round hole of the fixed plate, two groove holes 411 are formed in the side plate, the two groove holes are respectively located on two sides of the fixed plate, and the connecting line center point of the two groove holes is located at the center of the fixed plate. A lever mounting hole 412 is fixed to the front of the side plate for mounting the lever. The beam splitter plate is fixed after the bolts penetrate through the groove-shaped holes, the beam splitter plate can rotate relative to the beam splitter adjusting plate through the groove-shaped holes, in order to facilitate adjustment in the adjustment process, the two bolts are slightly fixed, the lever is screwed into the lever mounting hole, and the angle of the beam splitter can be adjusted by pulling the lever.
The wave plate mounting clamp 6 is positioned at the lower part of the spectroscope plate and fixed at one side of the spectroscope adjusting plate, the wave plate is mounted in the wave plate mounting barrel, and the wave plate mounting barrel is arranged in the wave plate mounting clamp and fastened through bolts.
As shown in fig. 4-6, the invention also discloses an emitting device using the adjustable mechanism, which comprises a total reflection assembly 9, an emitting bottom plate 10, a laser 12 and at least one set of adjusting structures (four sets of adjusting mechanisms are adopted in the invention); the laser is fixed on the emission bottom plate, the total reflection assembly is positioned at one side of the light emitting end of the laser and is fixed on the emission bottom plate, and the total reflection assembly comprises a total reflection adjusting plate 91, a reflection adjusting plate 92 and a total reflection mirror 93; one side of the total reflection adjusting plate is fixed at the bottommost part of the mounting column, the front side of the total reflection adjusting plate is provided with an adjusting groove 911, the back side of the reflection adjusting plate is provided with an adjusting protrusion 921 matched with the adjusting groove, two sides of the reflection adjusting plate are fixed with the total reflection adjusting plate through bolts, and the total reflection mirror is fixed on the reflection adjusting plate, as shown in fig. 5, in order to enable the total reflection mirror to be tightly fixed on the reflection adjusting plate, a tension bolt and a pressing block are arranged to press the total reflection mirror; a wave plate mounting clamp, a wave plate mounting barrel and a wave plate are fixed at the upper part of the front side of the total reflection adjusting plate; the adjusting structure is positioned at the upper part of the total reflection assembly and is arranged at equal intervals upwards along the mounting column. The section of the total reflecting mirror is isosceles right triangle. In fig. 6, the right side portion is four sets of receiving devices corresponding to the transmitting devices.
The installation mode is as follows: the mounting posts are secured to the base plate, the laser is secured to the base plate, and the total reflection assembly, the adjustable mechanism (wave plate assembly and four-component mirror assembly) are sequentially mounted to the mounting posts.
As shown in fig. 8, the optical path: the laser is fixed to the base plate and is not adjustable. Green light is emitted horizontally, and through the total reflection assembly, green light is emitted vertically upwards. Through the four-way light splitting assembly, the light splitting assembly forms a 45-degree angle with the vertical way, and the light splitting assembly can transmit a part of light vertically upwards and a part of light horizontally.
The light path adjusting mode is as follows: after the green laser is horizontally emitted, the total reflection assembly is fixed on the mounting column through a total reflection adjusting plate and a clamp, the left screw and the right screw are adjusted through locking, the total reflection adjusting plate can rotate left and right, the total reflection mirror is fixed on the reflection adjusting plate, the reflection adjusting plate and the total reflection adjusting plate can rotate in the vertical direction through the upper screw and the lower screw, and the adjustment of the light path in the vertical direction is realized.
The adjustment of the adjustable mechanism of the beam splitting assembly, the beam splitting adjusting plate and the embracing card can realize the adjustment of the left and right directions of the light path through the beam splitter by adjusting and locking the left and right screws, the fixed holes on the beam splitter plate are slot holes, the rotation can be realized, and the up and down direction adjustment of the light path after passing through the wind-powered mirror is realized by rotating the beam splitter plate.
In order to lighten the weight of the equipment, but not to influence the structural strength, the main body material is 7075 aluminum alloy, parts with local stress concentration are selected, and in order to prevent stress deformation during locking, such as clamping, the spectroscope plate is made of steel materials.
The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.
Claims (7)
1. A beam split subassembly adjustable structure for adjusting four routes green light parallel emission, its characterized in that: the device comprises a mounting column, a beam splitting adjusting plate, a holding clamp, a beam splitter plate, a beam splitter, a wave plate mounting holding clamp, a wave plate mounting barrel and a wave plate; one side of the beam splitting adjusting plate is fixed on the mounting column through the holding clamp, the beam splitter plate is composed of a side plate and a fixing plate, the side part of the fixing plate is fixed on the side plate, the beam splitter is mounted in a middle round hole of the fixing plate, two groove-shaped holes are formed in the side plate, the wave plate mounting holding clamp is positioned at the lower part of the beam splitter plate and is fixed on one side of the beam splitting adjusting plate, the wave plate is mounted in the wave plate mounting barrel, and the wave plate mounting barrel is arranged in the wave plate mounting holding clamp and is fastened through bolts; the two sides of the mounting column are respectively provided with a limit groove, the inner side of the holding clamp is provided with a bump matched with the limit groove, one side of the beam-splitting adjusting plate comprises a semicircle, the center of the inner side of the beam-splitting adjusting plate is provided with an arc-shaped bulge, the arc-shaped bulge is matched with the limit groove, and two ends of the holding clamp are fixed with the beam-splitting adjusting plate through bolts; the front part of the side plate is fixed with a lever mounting hole for mounting a lever.
2. The adjustable structure of a light splitting assembly for adjusting four-way green light parallel emission according to claim 1, wherein: the two groove-shaped holes are respectively positioned at two sides of the fixed plate, and the connecting line of the axes of the two groove-shaped holes is circular.
3. The adjustable structure of a light splitting assembly for adjusting four-way green light parallel emission according to claim 1, wherein: the fixing plate is located on a diagonal line of the side plate.
4. The adjustable structure of a light splitting assembly for adjusting four-way green light parallel emission according to claim 1, wherein: the central point of the connecting line of the two groove-shaped holes is positioned at the center of the fixed plate.
5. A launch device employing an adjustable structure as claimed in any one of claims 1 to 4, wherein: comprises an emission bottom plate, a laser, a total reflection assembly and at least one set of adjusting structure; the outlet end of the laser is opposite to the total reflection assembly, the total reflection assembly is positioned at one side of the light outlet end of the laser and is fixed on the emission bottom plate, and the total reflection assembly comprises a total reflection adjusting plate, a reflection adjusting plate and a total reflection mirror; one side of the total reflection adjusting plate is fixed at the bottommost part of the mounting column, the front side of the total reflection adjusting plate is provided with an adjusting groove, the back side of the reflection adjusting plate is provided with an adjusting protrusion matched with the adjusting groove, two sides of the reflection adjusting plate are fixed with the total reflection adjusting plate through bolts, and the total reflection mirror is fixed on the reflection adjusting plate; a wave plate mounting clamp, a wave plate mounting barrel and a wave plate are fixed on the upper part of the front side of the total reflection adjusting plate or on the side opposite to the laser; the adjustable structure is positioned at the upper part of the total reflection assembly and is installed at equal intervals upwards along the installation column.
6. The transmitting device of claim 5, wherein: the section of the total reflecting mirror is isosceles right triangle.
7. The transmitting device of claim 5, wherein: the reflection adjusting plate is fixedly provided with a tension bolt, the end part of the tension bolt is fixedly provided with a pressing block, and the pressing block tightly presses the total reflection mirror.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910739148.XA CN110455723B (en) | 2019-08-12 | 2019-08-12 | Light splitting component adjustable structure for adjusting four paths of green light parallel emission and emitting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910739148.XA CN110455723B (en) | 2019-08-12 | 2019-08-12 | Light splitting component adjustable structure for adjusting four paths of green light parallel emission and emitting device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110455723A CN110455723A (en) | 2019-11-15 |
| CN110455723B true CN110455723B (en) | 2024-04-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910739148.XA Active CN110455723B (en) | 2019-08-12 | 2019-08-12 | Light splitting component adjustable structure for adjusting four paths of green light parallel emission and emitting device |
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| CN (1) | CN110455723B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101518968B1 (en) * | 2014-03-28 | 2015-05-11 | (주)켄텍 | Real time Measurement Device in the Exhaust gas of the Motor Vehicle on the Move |
| CN107014773A (en) * | 2017-05-04 | 2017-08-04 | 天津同阳科技发展有限公司 | Super-wide coverage face optics flue gas monitoring system |
| CN206531778U (en) * | 2016-11-09 | 2017-09-29 | 浙江多普勒环保科技有限公司 | A kind of many light path remote exhaust emission test devices |
| CN108956406A (en) * | 2018-09-21 | 2018-12-07 | 安徽农业大学 | A kind of smoke intensity detection optical system and its method |
| CN208537834U (en) * | 2018-07-03 | 2019-02-22 | 华电智控（北京）技术有限公司 | Tail gas telemetered signal emitter and system |
| CN109655407A (en) * | 2018-12-29 | 2019-04-19 | 海南京溪科技有限公司 | Fixed automotive vehicle remote exhaust emission automatic monitoring system |
| CN208872660U (en) * | 2018-02-14 | 2019-05-17 | 天津同阳科技发展有限公司 | Tail gas measuring device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102353325B (en) * | 2011-07-22 | 2013-08-14 | 中国科学院上海光学精密机械研究所 | Four-axial four-subdivision interferometer |
-
2019
- 2019-08-12 CN CN201910739148.XA patent/CN110455723B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101518968B1 (en) * | 2014-03-28 | 2015-05-11 | (주)켄텍 | Real time Measurement Device in the Exhaust gas of the Motor Vehicle on the Move |
| CN206531778U (en) * | 2016-11-09 | 2017-09-29 | 浙江多普勒环保科技有限公司 | A kind of many light path remote exhaust emission test devices |
| CN107014773A (en) * | 2017-05-04 | 2017-08-04 | 天津同阳科技发展有限公司 | Super-wide coverage face optics flue gas monitoring system |
| CN208872660U (en) * | 2018-02-14 | 2019-05-17 | 天津同阳科技发展有限公司 | Tail gas measuring device |
| CN208537834U (en) * | 2018-07-03 | 2019-02-22 | 华电智控（北京）技术有限公司 | Tail gas telemetered signal emitter and system |
| CN108956406A (en) * | 2018-09-21 | 2018-12-07 | 安徽农业大学 | A kind of smoke intensity detection optical system and its method |
| CN109655407A (en) * | 2018-12-29 | 2019-04-19 | 海南京溪科技有限公司 | Fixed automotive vehicle remote exhaust emission automatic monitoring system |
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| CN110455723A (en) | 2019-11-15 |
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Address after: 300384 building a-702, No.5, Lanyuan Road, Huayuan Industrial Zone, Binhai high tech Zone, Binhai New Area, Tianjin Applicant after: TIANJIN TONGYANG TECHNOLOGY DEVELOPMENT Co.,Ltd. Address before: 300457 building a-703, No.5, Lanyuan Road, Huayuan Industrial Zone, Binhai high tech Zone, Binhai New Area, Tianjin Applicant before: TIANJIN TONGYANG TECHNOLOGY DEVELOPMENT Co.,Ltd. |
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