CN111879963A - Novel wind power monitoring device - Google Patents
Novel wind power monitoring device Download PDFInfo
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- CN111879963A CN111879963A CN202010493963.5A CN202010493963A CN111879963A CN 111879963 A CN111879963 A CN 111879963A CN 202010493963 A CN202010493963 A CN 202010493963A CN 111879963 A CN111879963 A CN 111879963A
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- spoiler
- measuring sheet
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P5/00—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft
- G01P5/08—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring variation of an electric variable directly affected by the flow, e.g. by using dynamo-electric effect
- G01P5/086—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring variation of an electric variable directly affected by the flow, e.g. by using dynamo-electric effect by using special arrangements and constructions for measuring the dynamo-electric effect
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P1/00—Details of instruments
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P13/00—Indicating or recording presence, absence, or direction, of movement
- G01P13/02—Indicating direction only, e.g. by weather vane
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Indicating Or Recording The Presence, Absence, Or Direction Of Movement (AREA)
Abstract
The invention relates to the technical field of monitoring instruments and discloses a novel wind power monitoring device which comprises a lower fixing seat, wherein a bearing is fixedly arranged in the lower fixing seat, a rotating base is movably sleeved in the bearing, a magnet supporting seat is fixedly arranged at the top of the rotating base, and the cross section of a measuring sheet is bullet-shaped. When wind blows over the measuring sheet, the measuring sheet can generate a windward trend, the side with the smaller thickness in the measuring sheet is windward under the action of the rotation of the bearing, at the moment, the wind direction is calculated through the rotation angle, the function that the device can test the wind direction is realized, meanwhile, when the wind blows over the measuring sheet, fluid alternately generates vortex separated from the surface of a structure to enable the measuring sheet to generate self-excited bending and swing left and right, so that a lead in the measuring sheet generates the movement of a magnetic induction line cutting the magnet supporting seat along with the bending and the left and right swinging of the measuring sheet and generates induction current, and the current flows into the current measurer through the conduction of the lead and is measured by the current measurer.
Description
Technical Field
The invention relates to the technical field of monitoring instruments, in particular to a novel wind power monitoring device.
Background
Wind-force monitoring facilities carries out the equipment monitored to the wind direction and the wind level of wind, and general monitoring facilities have the wind level monitor of flaky wind direction piece and rotary type to monitor wind-force respectively usually, and a hemisphere casing is connected through a quarter butt to wind level detector wherein, blows the casing through wind and drives disconnected pole and pivot and rotate this kind of monitoring facilities structure comparatively simple to it is convenient to use ann, low cost.
But current wind-force monitor is at the pivoted in-process, and the hemisphere casing is when receiving the effect of wind force rotatory to the leeward side, and the direction of motion and the opposite to the great frictional force of production of wind direction of hemisphere casing, and this frictional force makes the measured value can be less than the actual value and lead to measuring inaccurate to the frictional force that the pivot of wind level monitor produced also can influence the precision of its monitoring, to this, provides a novel wind-force monitoring device, aims at solving the above-mentioned problem that proposes.
Disclosure of Invention
Aiming at the defects of the existing monitoring instrument in the use process in the background technology, the invention provides a novel wind power monitoring device which has the advantage of eliminating the error generated in the monitoring process of the original equipment and solves the problem that the wind level detector in the traditional wind power monitoring device generates friction opposite to the wind direction when rotating to reduce the testing precision.
The invention provides the following technical scheme: the utility model provides a novel wind-force monitoring device, includes fixing base down, the inside fixed mounting of fixing base has the bearing down, the inside activity of bearing has cup jointed the rotation base, the top fixed mounting who rotates the base has the magnet supporting seat, the inside fixed mounting of magnet supporting seat has the backing plate, the top fixed mounting of magnet supporting seat has measuring device, measuring device's top fixed mounting has the cushion, the top fixed mounting of cushion has reset spring, reset spring's top fixed mounting has the pivot, the top fixed mounting of pivot has last fixing base.
Preferably, the measuring device comprises a measuring sheet, a wire is sleeved inside the measuring sheet, a left spoiler is fixedly mounted on one side of the measuring sheet, a right spoiler is fixedly mounted on the other side of the measuring sheet, rectifying plates are fixedly mounted on two sides of the measuring sheet, and a current measurer is fixedly mounted at the position, behind the measuring sheet, of the bottom of the measuring sheet.
Preferably, the cross section of the measuring sheet is bullet-shaped, the angle of an included angle a between the left spoiler and the measuring sheet is thirty degrees, the angle of an included angle b between the right spoiler and the measuring sheet is sixty degrees, and the mass of the left spoiler is the same as that of the right spoiler.
Preferably, the left spoiler and the right spoiler are both installed on both sides of the measuring piece in a linear array manner, and the left spoiler and the right spoiler are installed at positions corresponding to each other with an installation distance of twenty centimeters.
Preferably, the length of the upper part of the rectifying plate is longer than the length of the lower part of the rectifying plate, the rectifying plate is arranged in the space between the left spoiler and the right spoiler, and the side with the smaller thickness of the rectifying plate is directed to the right side in fig. 4.
Preferably, the output end of the conducting wire is connected with the input end of the current measurer in a signal connection mode.
The invention has the following beneficial effects:
1. the invention is movably sleeved with a rotating base through the inside of a bearing, a magnet supporting seat is fixedly arranged at the top of the rotating base, the cross section of a measuring sheet is in a bullet shape, when wind blows over the measuring sheet, the measuring sheet can generate a windward trend, one side with smaller thickness in the measuring sheet is windward under the action of the rotation of the bearing, at the moment, the wind direction is calculated through a rotating angle, the function of testing the wind direction of the device is realized, meanwhile, when the wind blows over the measuring sheet, fluid alternately generates vortex separated from the surface of a structure to enable the measuring sheet to generate self-excitation type bending and left-right swinging, leads in the measuring sheet to generate the motion of magnetic induction lines cutting the magnet supporting seat along with the bending and left-right swinging of the measuring sheet and generate induction current, the current flows into a current measurer through the conduction of the leads and is measured by the current measurer, and the size of the wind force is positively correlated with the swinging amplitude of the measuring sheet due to the vortex vibration, that is, the induced current in the wire measured by the current measurer directly reflects the magnitude of the wind level, and on one hand, the angle of the included angle a between the left spoiler and the measuring sheet is thirty degrees, and the angle of the included angle b between the right spoiler and the measuring sheet is sixty degrees, so that the wind receiving surfaces of the left spoiler and the right spoiler at both sides are different in fig. 5, the vortex vibration intensity generated by the vortex generated by the wind alternately separating from the surface of the structure is increased, the swing amplitude of the measuring sheet is increased when the wind is weak, so that the measuring sheet can still measure under the condition of small wind, on the other hand, the self weights of the left spoiler and the right spoiler are mutually balanced by the same mass of the left spoiler and the mounting positions of the left spoiler corresponding to each other, and the condition that the measuring sheet has errors under the influence of the self weights of the left spoiler and the right spoiler is eliminated, meanwhile, the wind direction can be measured by the measuring sheet.
2. The invention makes the installation position between the left spoiler and the right spoiler correspond to each other and the installation space between the left spoiler and the right spoiler is twenty centimeters, and the fairing is installed in the space between the left spoiler and the right spoiler, so that when wind blows the measuring sheet, a part of the wind can flow to the fairing through the gap between the left spoiler and the right spoiler, when the measuring sheet rotates to the windward position, the side with smaller thickness of the fairing points to the right side in FIG. 4 to play the role of fairing, the effect that the side with smaller thickness of the measuring sheet can actively rotate to the windward position is promoted, meanwhile, the speed of the wind above the fairing is increased by the length above the fairing being larger than the length below, so that the flow speed difference is generated on the two sides of the fairing, the fairing generates the lift force, when the measuring sheet swings under the influence of vortex vibration, the gravity center position of the measuring sheet can also shift, and the lift force generated by the fairing can balance the measurement error caused by the gravity center position shift of the measuring sheet, the measuring precision of the device is improved.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic cross-sectional view of the structure of the present invention;
FIG. 3 is a schematic view of a structural measurement apparatus according to the present invention;
FIG. 4 is a schematic front view of a structural measurement device according to the present invention;
FIG. 5 is a right side view of the structural measurement device of the present invention;
FIG. 6 is an enlarged view of the point A in FIG. 4;
FIG. 7 is a schematic cross-sectional view of a structural measurement device according to the present invention;
FIG. 8 is a schematic top view of a structural metrology device of the present invention.
In the figure: 1. a lower fixed seat; 2. a bearing; 3. rotating the base; 4. a magnet supporting seat; 5. a base plate; 6. a measuring device; 61. measuring the sheet; 62. a wire; 63. a left spoiler; 64. a right spoiler; 65. a rectifying plate; 66. a current measurer; 7. cushion blocks; 8. a return spring; 9. a rotating shaft; 10. an upper fixing seat.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-8, a novel wind monitoring device comprises a lower fixing base 1, a bearing 2 is fixedly installed inside the lower fixing base 1, a rotating base 3 is movably sleeved inside the bearing 2, a magnet supporting base 4 is fixedly installed at the top of the rotating base 3, the magnet supporting base 4 is formed by installing two magnets in a stacking mode, and the single-stage direction of the magnets inside is the same, the magnetic field intensity can be increased by adopting the mode, the current generated when a wire 62 cuts a magnetic field is larger, a backing plate 5 is fixedly installed inside the magnet supporting base 4, a measuring device 6 is fixedly installed at the top of the magnet supporting base 4, the backing plate 5 and the measuring device 6 are fixedly installed, when the rotating base 3 rotates, the magnet supporting base 4 and the measuring device 6 are kept relatively static, and the rotating function only enables the measuring device 6 to be located at a windward position, the measurement piece 61 is shaken by the wind due to the eddy vibration effect, so that the wire 62 generates the motion of a cutting magnetic field and generates a current, and the current reflects the wind force. Because the outer surface of the wire is coated with the insulating coating, the wire 62 and the measuring sheet 61 are not in direct contact with each other to cause mutual interference, the measuring device 6 comprises the measuring sheet 61, the cross section of the measuring sheet 61 is bullet-shaped, the wire 62 is sleeved inside the measuring sheet 61, one side of the measuring sheet 61 is fixedly provided with the left spoiler 63, the other side of the measuring sheet 61 is fixedly provided with the right spoiler 64, the angle of the included angle a between the left spoiler 63 and the measuring sheet 61 is thirty degrees, the angle of the included angle b between the right spoiler 64 and the measuring sheet 61 is sixty degrees, the mass of the left spoiler 63 is the same as that of the right spoiler 64, the left spoiler 63 and the right spoiler 64 are both mounted on both sides of the measuring sheet 61 in a linear array manner, the mounting positions between the left spoiler 63 and the right spoiler 64 correspond to each other and the mounting distance between the left spoiler 63 and the right spoiler 64 is twenty centimeters, both sides of the measuring sheet 61 are fixedly provided with the flow, the length of the top of cowling panel 65 is greater than the length of below and cowling panel 65 installs in the interval of left spoiler 63 and right spoiler 64, the less one side of cowling panel 65 thickness points to the right side in fig. 4, fixed mounting has current measurement ware 66 on the position that the measurement piece 61 bottom is located the back, the output of wire 62 is connected with current measurement ware 66's input through signal connection's mode, measuring device 6's top fixed mounting has cushion 7, the top fixed mounting of cushion 7 has reset spring 8, reset spring 8's top fixed mounting has pivot 9, the top fixed mounting of pivot 9 has last fixing base 10.
Wherein, the rotating base 3 is movably sleeved in the bearing 2, the magnet support seat 4 is fixedly installed on the top of the rotating base 3, the cross section of the measuring sheet 61 is in a bullet shape, when wind blows over the measuring sheet 61, the measuring sheet 61 can generate a trend facing the wind, and the side with smaller thickness in the measuring sheet 61 faces the wind under the action of the rotation of the bearing 2, at the moment, the wind direction is calculated through the rotation angle, the function of the device for testing the wind direction is realized, meanwhile, when the wind blows over the measuring sheet 61, the fluid alternately generates vortex separated from the surface of the structure to cause the measuring sheet 61 to generate self-excited bending and swing left and right, the lead 62 in the measuring sheet 61 generates the movement of cutting the magnetic induction line of the magnet support seat 4 along with the bending and swing left and right of the measuring sheet 61 and generates induction current, the current flows into the current measurer 66 through the conduction of the lead 62 and is measured by the current measurer 66, because the wind power is positively correlated with the swing amplitude of the measuring sheet 61 caused by vortex vibration, that is, the induced current in the conducting wire 62 measured by the current measuring device 66 directly reflects the wind level, and the angle a between the left spoiler 63 and the measuring sheet 61 is thirty degrees, and the angle b between the right spoiler 64 and the measuring sheet 61 is sixty degrees, the wind receiving surfaces of the left spoiler 63 and the right spoiler 64 on both sides are different in fig. 5, the vortex vibration strength generated by vortex generated by the wind alternately separating from the surface of the structure is increased, the swing amplitude of the measuring sheet 61 is increased when the wind power is weak, so that the measuring can be carried out under the condition of small wind power, on the other hand, the mass of the left spoiler 63 is the same as that of the right spoiler 64, and the installation positions of the left spoiler 63 and the right spoiler 64 correspond to each other, the dead weights of the measuring pieces can be balanced, the situation that the measuring piece 61 makes measurement errors under the influence of the dead weights of the left spoiler 63 and the right spoiler 64 is eliminated, and meanwhile, the measuring piece 61 can measure wind power while measuring the wind direction.
Wherein, the installation positions of the left spoiler 63 and the right spoiler 64 are corresponding to each other, the installation distance between the left spoiler 63 and the right spoiler 64 is twenty centimeters, and the rectifying plate 65 is installed in the distance between the left spoiler 63 and the right spoiler 64, so that when wind blows over the measuring sheet 61, a part of the wind can flow to the rectifying plate 65 through the gap between the left spoiler 63 and the right spoiler 64, when the measuring sheet 61 rotates to the windward position, the side with smaller thickness of the rectifying plate 65 is directed to the right side in fig. 4 to play a role of rectifying, the effect that the side with smaller thickness of the measuring sheet 61 can actively rotate to the windward position is promoted, meanwhile, the length above the rectifying plate 65 is greater than the length below, so that the speed of the wind above the rectifying plate 65 is increased, the flow speed difference is generated on the two sides of the rectifying plate 65, the rectifying plate 65 generates a lift force, when the measuring sheet 61 swings under the influence of vortex vibration, the gravity center position of the measuring sheet 61 can also shift, the lift force generated by the rectifying plate 65 balances the measurement error caused by the position deviation of the gravity center of the measuring sheet 61, and the measurement precision of the device is improved.
Wherein, there is cushion 7 through measuring device 6's top fixed mounting, and the top fixed mounting of cushion 7 has reset spring 8, connects through reset spring 8 and can make measuring piece 61 remain vertical state throughout with the reset action, prevents that it from appearing crooked condition when static or at the oscillating, improves the stability of the device during operation.
The using method of the invention is as follows:
when in use, the lower fixed seat 1 and the upper fixed seat 10 are fixed at the monitoring position, when wind blows, the measuring sheet 61 can generate a windward trend, the side with smaller thickness in the measuring sheet 61 is windward under the action of the rotation of the bearing 2, the wind direction can be calculated by measuring the rotation angle, the wind blows over the measuring sheet 61, the left spoiler 63 and the right spoiler 64 at the two sides are different on the wind receiving surface in the figure 5, so that the wind alternately generates vortex which is separated from the surface of a structure to generate vortex vibration, the measuring sheet 61 is promoted to generate self-excited bending and left-right swinging, the lead 62 in the measuring sheet 61 is driven to generate the movement of cutting the magnetic induction line of the magnet supporting seat 4 and generate induction current, the current flows into the current measurer 66 through the lead 62, the spiral lead in the current measurer 66 is electrified and rotates under the action of the magnet, and the deflection of the finger is driven, that is, the current in the wire 62 is measured by the current measuring device 66, and the eddy vibration amplitude of the measuring piece 61 is in positive correlation with the wind power, so that the induced current generated by the wire 62 directly reflects the wind level, and the rectifying plate 65 generates a certain wind power under the action of the wind power to balance the error caused by the gravity center shift due to the bending swing of the measuring piece 61.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The utility model provides a novel wind-force monitoring device, includes fixing base (1) down, its characterized in that: the inside fixed mounting of lower fixing base (1) has bearing (2), the inside activity of bearing (2) has cup jointed rotation base (3), the top fixed mounting who rotates base (3) has magnet supporting seat (4), the inside fixed mounting of magnet supporting seat (4) has backing plate (5), the top fixed mounting of magnet supporting seat (4) has measuring device (6), the top fixed mounting of measuring device (6) has cushion (7), the top fixed mounting of cushion (7) has reset spring (8), the top fixed mounting of reset spring (8) has pivot (9), the top fixed mounting of pivot (9) has last fixing base (10).
2. The novel wind power monitoring device of claim 1, wherein: measuring device (6) are including measuring piece (61), the inside cover of measuring piece (61) is equipped with wire (62), one side fixed mounting who measures piece (61) has left spoiler (63), the opposite side fixed mounting who measures piece (61) has right spoiler (64), the both sides fixed mounting who measures piece (61) has cowling panel (65), fixed mounting has current measurement ware (66) on the position that measures piece (61) bottom is located the back.
3. A novel wind monitoring device according to claim 2, characterized in that: the cross section of the measuring sheet (61) is bullet-shaped, the angle of an included angle a between the left spoiler (63) and the measuring sheet (61) is thirty degrees, the angle of an included angle b between the right spoiler (64) and the measuring sheet (61) is sixty degrees, and the mass of the left spoiler (63) is the same as that of the right spoiler (64).
4. The novel wind power monitoring device of claim 1, wherein: the left spoiler (63) and the right spoiler (64) are mounted on two sides of the measuring sheet (61) in a linear array mode, and the mounting positions of the left spoiler (63) and the right spoiler (64) correspond to each other and the mounting distance between the left spoiler and the right spoiler is twenty centimeters.
5. The novel wind power monitoring device of claim 1, wherein: the length of the upper part of the rectifying plate (65) is larger than the length of the lower part of the rectifying plate, the rectifying plate (65) is installed in the space between the left spoiler (63) and the right spoiler (64), and the side, with the smaller thickness, of the rectifying plate (65) points to the right side in fig. 4.
6. The novel wind power monitoring device of claim 1, wherein: the output end of the lead (62) is connected with the input end of the current measurer (66) in a signal connection mode.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010493963.5A CN111879963B (en) | 2020-06-03 | 2020-06-03 | Wind power monitoring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010493963.5A CN111879963B (en) | 2020-06-03 | 2020-06-03 | Wind power monitoring device |
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| CN111879963A true CN111879963A (en) | 2020-11-03 |
| CN111879963B CN111879963B (en) | 2022-05-31 |
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| CN202010493963.5A Active CN111879963B (en) | 2020-06-03 | 2020-06-03 | Wind power monitoring device |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101454564A (en) * | 2006-04-02 | 2009-06-10 | 古斯塔夫·保罗·克尔滕 | Wind turbine with slender blade |
| EP2818875A1 (en) * | 2013-06-27 | 2014-12-31 | Wilmers Messtechnik GmbH | Wind direction measuring device and method for measuring wind direction |
| CN109282852A (en) * | 2018-10-17 | 2019-01-29 | 南京布拎信息科技有限公司 | A kind of artificial intelligence external information acquisition device and its application method |
| CN209148718U (en) * | 2019-01-23 | 2019-07-23 | 威海精讯畅通电子科技有限公司 | A kind of wind direction measuring instrument |
| CN209280743U (en) * | 2018-12-06 | 2019-08-20 | 河南昶明航标机电设备有限公司 | A kind of beacon light device with detection wind direction function |
| CN209400561U (en) * | 2019-01-23 | 2019-09-17 | 威海精讯畅通电子科技有限公司 | Air speed measuring apparatus |
-
2020
- 2020-06-03 CN CN202010493963.5A patent/CN111879963B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101454564A (en) * | 2006-04-02 | 2009-06-10 | 古斯塔夫·保罗·克尔滕 | Wind turbine with slender blade |
| EP2818875A1 (en) * | 2013-06-27 | 2014-12-31 | Wilmers Messtechnik GmbH | Wind direction measuring device and method for measuring wind direction |
| CN109282852A (en) * | 2018-10-17 | 2019-01-29 | 南京布拎信息科技有限公司 | A kind of artificial intelligence external information acquisition device and its application method |
| CN209280743U (en) * | 2018-12-06 | 2019-08-20 | 河南昶明航标机电设备有限公司 | A kind of beacon light device with detection wind direction function |
| CN209148718U (en) * | 2019-01-23 | 2019-07-23 | 威海精讯畅通电子科技有限公司 | A kind of wind direction measuring instrument |
| CN209400561U (en) * | 2019-01-23 | 2019-09-17 | 威海精讯畅通电子科技有限公司 | Air speed measuring apparatus |
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Effective date of registration: 20220511 Address after: 255000 floor 7, block B, polymer material industrial innovation park, No. 51, Lutai Avenue, high tech Zone, Zibo City, Shandong Province Applicant after: SHANDONG JIAYU TESTING TECHNOLOGY Co.,Ltd. Address before: 230031 Xindi center at the intersection of Qimen road and Qianshan Road, Hefei government district, Anhui Province 1604-1608 Applicant before: Hefei Zuoxin Technology Co.,Ltd. |
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