CN115639375B - Laser Doppler velocimeter - Google Patents
Laser Doppler velocimeter Download PDFInfo
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- CN115639375B CN115639375B CN202211256813.8A CN202211256813A CN115639375B CN 115639375 B CN115639375 B CN 115639375B CN 202211256813 A CN202211256813 A CN 202211256813A CN 115639375 B CN115639375 B CN 115639375B
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- 210000001503 joint Anatomy 0.000 claims description 9
- 238000009434 installation Methods 0.000 abstract description 3
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 230000008878 coupling Effects 0.000 description 7
- 238000010168 coupling process Methods 0.000 description 7
- 238000005859 coupling reaction Methods 0.000 description 7
- 230000003287 optical effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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Abstract
The invention provides a laser Doppler velocimeter which comprises a velocimeter body, wherein the velocimeter body comprises a supporting structure, a controller and a laser, the controller is arranged at the top end of the supporting structure, a control panel is arranged on the surface of the controller, the cross section of the supporting structure is of a triangular structure, connecting components are arranged on two sides of the supporting structure, a bottom plate is arranged at the bottom end of the supporting structure, the bottom plate comprises a main supporting plate and two auxiliary supporting plates, plug-in columns are arranged on the side edges of the auxiliary supporting plates, the supporting structure is matched with the connecting components, the distance between the laser and the controller can be regulated and controlled, the distance between the two lasers is further changed, the flexibility of equipment is improved, a plurality of adjustable installation positions are provided through threaded hole connection, and rigid connection is still kept between the supporting structures at the bottom after the equipment is unfolded, so that the supporting area is enlarged, and the stability is improved.
Description
Technical Field
The invention relates to the technical field of monitoring equipment, in particular to a laser Doppler velocimeter.
Background
The laser Doppler velocimeter is a common speed measurement device, speed measurement is carried out on a certain fixed point position through two staggered laser beams, so that two lasers are needed to be matched, in the prior art, the two lasers and a velocimeter controller body are combined into a whole to be used, the irradiation range of the lasers is limited by an installation position, the initial point position distance of the laser beams is relatively close, interference is easily caused between the lasers, the precision is insufficient, on the other hand, when the lasers are used for ranging, the whole velocimeter is required to be calibrated and adjusted, the adjustment comprises horizontal adjustment, the error generated during adjustment of the level meter is larger due to smaller interval between the lasers, the error is increased, and when the object moving at high speed is measured, the air flow impact generated by high-speed movement is received, so that shaking is generated due to the air flow impact, and the stability is insufficient.
Disclosure of Invention
Aiming at the defects existing in the prior art, the invention aims to provide a laser Doppler velocimeter so as to solve the problems in the background art, and the laser Doppler velocimeter can freely expand the mounting position of a laser, improves the flexibility, and is more accurate and efficient in leveling and higher in stability.
In order to achieve the above object, the present invention is realized by the following technical scheme: the utility model provides a laser Doppler velocimeter, includes the velocimeter body, the velocimeter body includes bearing structure, controller and laser instrument, the top at bearing structure is installed to the controller, the surface of controller is provided with control panel, bearing structure's cross-section becomes triangle-shaped structure, and bearing structure's both sides all install coupling assembling, bearing structure's bottom is provided with the bottom plate, the bottom plate includes a main tributary fagging and two accessory support plates, accessory support plate's side is provided with the spliced pole, the accessory support plate is through spliced pole and main tributary support plate butt joint, the laser instrument is installed at accessory support plate's top, the laser instrument is provided with two, and two laser instruments are installed in the both sides of controller with the form of symmetry, every leveling subassembly is all installed to the bottom of laser instrument.
Further, bearing structure includes main tributary vaulting pole and auxiliary support pole, the side of main tributary vaulting pole is provided with the swash plate, the pivot is installed on the top of swash plate, and swash plate passes through pivot and coupling assembling swing joint, the butt joint screw has been seted up on the top of auxiliary support pole, the top at auxiliary support pole is installed to the laser instrument.
Further, the bottom ends of the main supporting rods and the middle position of the main supporting plate are welded into a whole, the auxiliary supporting rods and the middle position of the auxiliary supporting plate are welded into a whole, and the main supporting rods and the auxiliary supporting rods are kept parallel.
Further, the connecting assembly main body part comprises the connecting plate, the rear end of connecting plate is provided with the rotating plate, the locating plate is installed to the front end bottom of connecting plate, the laser instrument is along the surface of connecting assembly and is moved the regulation installation.
Further, the top of auxiliary support pole is provided with the layer board, the regulation screw has all been seted up to the surface of layer board and connecting plate, the surface of connecting plate and layer board keeps flush state.
Further, the rotating plate is connected with the top of the main supporting rod through a rotating shaft, and the surface of the positioning plate is fixedly connected with the side edge of the top of the auxiliary supporting rod through screws.
Further, the laser comprises a shell and an abutting plate, the bottom end of the shell is fixedly connected with the top of the abutting plate through an upright post, an adjusting screw hole is formed in the surface of the abutting plate, and the leveling assembly is fixedly connected with the bottom of the shell.
Furthermore, the laser is attached to the supporting plate or the connecting plate through the butt joint plate at the bottom, and the size specifications of the supporting plate and the butt joint plate are the same.
Further, the leveling assembly comprises a reel and a level, the top of the reel is fixed with the shell part into a whole through a fixed block, a through hole is formed in the surface of the reel, and a pull rope wound inside the reel penetrates out of the through hole.
Further, the supporting canvas is arranged at the middle position of the stay cord, the level gauge is arranged on the surface of the supporting canvas, the distance between the level gauge and the lasers on the two sides is the same, and the stay cord is wound inwards by the inner part of the scroll through the torsion spring.
The invention has the beneficial effects that: the invention discloses a laser Doppler velocimeter which comprises a velocimeter body, wherein the velocimeter body comprises a supporting structure, a connecting component, a laser, a leveling component, a bottom plate, a controller, a main supporting plate, an auxiliary supporting plate, a splicing column, a main supporting rod, an auxiliary supporting rod, a shell, a stand column, a butt joint plate, a supporting plate, a connecting plate, a positioning plate, a butt joint screw hole, an adjusting screw hole, a pull rope, a reel, a rotating plate, a rotating shaft, a fixed block, an inclined plate, supporting canvas and a level meter.
1. This laser Doppler velocimeter cooperatees through bearing structure and coupling assembling, can regulate and control the interval between laser instrument and the controller, and then change the distance between two laser instruments, can enlarge the crisscross position of laser beam that the laser instrument penetrated during the use to improve the flexibility of equipment, and provided a plurality of adjustable mounting positions through the screw hole connection.
2. This laser Doppler velocimeter is provided with leveling subassembly in the bottom of every laser instrument, therefore when control laser instrument carries out position adjustment removal, the adjusting part of bottom can all carry out the processing of making level in optional position, and the spirit level remains the intermediate position at two laser instruments all the time, therefore the precision is higher.
3. According to the laser Doppler velocimeter, the two lasers are moved in position through the supporting structure and the connecting assembly, and the supporting structures at the bottoms of the two lasers are still rigidly connected after the two lasers are moved, so that the supporting area of the supporting structure is enlarged, and the supporting stability is improved.
Drawings
FIG. 1 is a schematic diagram of the configuration of a laser Doppler velocimeter according to the present invention;
FIG. 2 is a schematic view of the laser Doppler velocimeter of the present invention after deployment;
FIG. 3 is a schematic diagram of a laser portion of a laser Doppler velocimeter of the present invention;
FIG. 4 is a schematic view of the top of the main support bar portion of a laser Doppler velocimeter according to the present invention;
FIG. 5 is a schematic view of a portion of a leveling assembly of a laser Doppler velocimeter according to the present invention;
In the figure: 1. a support structure; 2. a connection assembly; 3. a laser; 4. a leveling assembly; 5. a bottom plate; 6. a controller; 7. a main support plate; 8. an auxiliary supporting plate; 9. a plug-in column; 10. a main support rod; 11. an auxiliary supporting rod; 12. a housing; 13. a column; 14. an abutting plate; 15. a supporting plate; 16. a connecting plate; 17. a positioning plate; 18. a butt joint screw hole; 19. adjusting the screw hole; 20. a pull rope; 21. a reel; 22. a rotating plate; 23. a rotating shaft; 24. a fixed block; 25. a sloping plate; 26. supporting canvas; 27. and (5) a level gauge.
Detailed Description
The invention is further described in connection with the following detailed description, in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the invention easy to understand.
Referring to fig. 1 to 5, the present invention provides a technical solution: the utility model provides a laser Doppler velocimeter, includes the velocimeter body, the velocimeter body includes bearing structure 1, controller 6 and laser instrument 3, the top at bearing structure 1 is installed to controller 6, the surface of controller 6 is provided with control panel, the cross-section of bearing structure 1 becomes triangle-shaped structure, and the coupling assembling 2 is all installed to bearing structure 1's both sides, bearing structure 1's bottom is provided with bottom plate 5, bottom plate 5 includes a main tributary fagging 7 and two vice backup pad 8, the side of vice backup pad 8 is provided with spliced pole 9, vice backup pad 8 is through spliced pole 9 and main tributary fagging 7, laser instrument 3 is installed at the top of vice backup pad 8, laser instrument 3 is provided with two, and two laser instruments 3 are installed in the both sides of controller 6 with the form of symmetry, and every laser instrument 3's bottom all installs leveling subassembly 4, and the laser beam that this laser Doppler instrument passes through two laser instruments 3 at the top gathers crisscross in a certain point position in the distance promptly, can realize carrying out the speed change function to this position, and the speed change the optical signal of the device is realized through the detector when the speed change the speed of the detector is the monitor and the optical signal is the light receiver 6 and the speed change is the control signal of the optical signal is the area, and the speed change is the optical signal is the region of this position of the laser instrument is recorded through the surface, and the information has been carried out and the digital signal has been processed and is recorded and the information.
In this embodiment, the supporting structure 1 includes a main supporting rod 10 and an auxiliary supporting rod 11, the side edge of the main supporting rod 10 is provided with a sloping plate 25, the top end of the sloping plate 25 is provided with a rotating shaft 23, the sloping plate 25 is movably connected with the connecting component 2 through the rotating shaft 23, the top end of the auxiliary supporting rod 11 is provided with a butt joint screw hole 18, the laser 3 is installed at the top of the auxiliary supporting rod 11, the bottom end of the main supporting rod 10 is welded with the middle position of the main supporting rod 7 into a whole, the middle position of the auxiliary supporting rod 11 is welded with the middle position of the auxiliary supporting rod 8 into a whole, the main supporting rod 10 and the auxiliary supporting rod 11 are kept parallel, by moving the two lasers 3 through the supporting structure 1 and the connecting component 2, and still keep rigid connection between the bearing structure 1 of bottom after removing, consequently enlarged bearing structure 1's supporting area, improved the stability of support, when making up, dock bottom main tributary fagging 7 and vice backup pad 8 through spliced pole 9, can form complete circular bottom plate 5 structure, two lasers 3 at top concentrate the vicinity of controller 6 this moment, make whole equipment volume shrink to minimum, be convenient for transport and remove under this state, and still can realize the speed monitoring function in this state, and the coupling assembling 2 of both sides keep laminating with the swash plate 25 part of main tributary fagging 7 under this state, can not occupy extra space of placing.
In this embodiment, the main body of the connection assembly 2 is composed of a connection plate 16, a rotating plate 22 is disposed at the rear end of the connection plate 16, a positioning plate 17 is mounted at the bottom of the front end of the connection plate 16, the laser 3 is mounted in a moving adjustment manner along the surface of the connection assembly 2, a supporting plate 15 is disposed at the top end of the auxiliary supporting rod 11, adjusting screw holes 19 are disposed on the surfaces of the supporting plate 15 and the connection plate 16, the surfaces of the connection plate 16 and the supporting plate 15 are kept in a flush state, the rotating plate 22 is connected with the top of the main supporting rod 10 through a rotating shaft 23, the surface of the positioning plate 17 is fixedly connected with the top side of the auxiliary supporting rod 11 through screws, the surface of the positioning plate 17 can be connected with the auxiliary supporting rod 11 through the connection assembly 2 when the laser 3 is moved outwards, the auxiliary supporting rods at the bottom of the laser 3 are still connected, the main supporting rod and the auxiliary supporting rods can be rigidly connected after being unfolded, the supporting area is enlarged, the stability is improved, the end of the connection plate 16 is aligned with the top of the auxiliary supporting rods through the positioning plate 17 at the bottom through the bottom of the screw holes 18 when being unfolded, and the auxiliary supporting rods 8 can be stably mounted through the fixing screws.
In this embodiment, the laser 3 includes shell 12 and butt plate 14, the top fixed connection of stand 13 and butt plate 14 is passed through to the bottom of shell 12, adjust screw 19 has been seted up to the surface of butt plate 14, leveling component 4 and the bottom fixed connection of shell 12, the laser 3 is laminated mutually with layer board 15 or connecting plate 16 through the butt plate 14 of bottom, and layer board 15 and the size specification of butt plate 14 are the same, cooperate through bearing structure 1 and coupling assembling 2, can regulate and control the interval between laser 3 and the controller 6, and then change the distance between two lasers 3, can enlarge the laser beam staggered point that laser 3 penetrated out during the use, thereby improve the flexibility of equipment, and provide a plurality of adjustable mounted positions through the threaded hole connection, when adjusting, need expand whole equipment, adjust coupling assembling 2 to the horizontality, through using the screw with the butt plate 14 part of laser 3 bottom fix on connecting plate 16 or on 15 at this moment, and all be provided with on connecting plate 16 and 15 and adjust the distance between two laser 3 and the controller, especially, can not change the laser beam position on the base plate 19 with the position of a plurality of adjustable positions, can accomplish the laser beam region through the position of the laser beam 19 on the two sides.
In this embodiment, the leveling component 4 includes the spool 21 and the level gauge 27, the top of spool 21 is fixed as a whole with the shell 12 part through fixed block 24, the through-hole has been seted up on the surface of spool 21, the inside winding stay cord 20 of spool 21 outwards wears out from the through-hole, support canvas 26 is installed to the intermediate position of stay cord 20, the surface mounting who supports canvas 26 has level gauge 27, and the interval between level gauge 27 and the laser 3 of both sides is the same, the inside of spool 21 is provided with leveling component 4 through the torsional spring with stay cord 20 to inside roll up, when the bottom of every laser 3 is provided with leveling component 4, therefore control laser 3 carries out the position adjustment removal, the adjustment component of bottom can all carry out the leveling processing in optional position, and the level gauge 27 remains in the intermediate position of two laser 3 all the time, therefore the precision is higher, when carrying out the level adjustment, directly stimulate each laser 3, the spool 21 of laser 3 bottom is with inside stay cord 20 to release to support the level gauge 27, and the level gauge 27 can reflect the interval between the laser 3 of both sides, and the bottom of the level gauge 27 can be the laser 3, wherein the level gauge 27 can be accomplished the level gauge is according to the conventional level gauge, the level gauge is installed to the level gauge 27, the level gauge is required to be installed to the level gauge according to the prior art.
While the fundamental and principal features of the invention and advantages of the invention have been shown and described, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.
Claims (3)
1. The utility model provides a laser Doppler velocimeter, includes the velocimeter body, its characterized in that: the velocimeter body comprises a supporting structure (1), a controller (6) and a laser (3), wherein the controller (6) is installed at the top end of the supporting structure (1), a control panel is arranged on the surface of the controller (6), the cross section of the supporting structure (1) is of a triangular structure, connecting components (2) are installed on two sides of the supporting structure (1), a bottom plate (5) is arranged at the bottom end of the supporting structure (1), the bottom plate (5) comprises a main supporting plate (7) and two auxiliary supporting plates (8), plug-in posts (9) are arranged on the side edges of the auxiliary supporting plates (8), the auxiliary supporting plates (8) are butted with the main supporting plate (7) through the plug-in posts (9), the laser (3) are installed at the top of the auxiliary supporting plates (8), the laser (3) are provided with two inclined plates, the two laser (3) are installed on two sides of the controller (6) in a symmetrical mode, leveling components (4) are installed at the bottom end of each laser (3), the supporting structure (1) comprises a main supporting rod (10) and a rotating shaft (25) is arranged on the side edges of the main supporting rod (25), the inclined plate (25) is movably connected with the connecting component (2) through a rotating shaft (23), a butt joint screw hole (18) is formed in the top end of the auxiliary supporting rod (11), the laser (3) is installed at the top of the auxiliary supporting rod (11), the bottom end of the auxiliary supporting rod (10) is welded with the middle position of the main supporting plate (7) into a whole, the middle positions of the auxiliary supporting rod (11) and the auxiliary supporting plate (8) are welded into a whole, the main supporting rod (10) and the auxiliary supporting rod (11) are kept parallel, the main body part of the connecting component (2) is composed of a connecting plate (16), a rotating plate (22) is arranged at the rear end of the connecting plate (16), a positioning plate (17) is installed at the bottom of the front end of the connecting plate (16), the laser (3) is movably and adjustably installed along the surface of the connecting component (2), an adjusting screw hole (15) is formed in the top end of the auxiliary supporting rod (11), adjusting screw holes (19) are formed in the surfaces of the supporting plate (15) and the connecting plate (16), the surfaces of the connecting plate (16) and the main supporting rod (10) are kept parallel, the surfaces of the connecting plate (16) and the surface of the connecting plate (15) are kept flush with the supporting rod (11) through the rotating plate (17), the laser device (3) comprises a shell (12) and an abutting plate (14), wherein the bottom end of the shell (12) is fixedly connected with the top of the abutting plate (14) through a stand column (13), an adjusting screw hole (19) is formed in the surface of the abutting plate (14), the leveling assembly (4) is fixedly connected with the bottom of the shell (12), the laser device (3) is attached to a supporting plate (15) or a connecting plate (16) through the abutting plate (14) at the bottom, and the size specifications of the supporting plate (15) and the abutting plate (14) are identical.
2. A laser doppler velocimeter as claimed in claim 1 wherein: the leveling assembly (4) comprises a reel (21) and a level meter (27), the top of the reel (21) is fixed with the shell (12) into a whole through a fixing block (24), a through hole is formed in the surface of the reel (21), and a pull rope (20) wound inside the reel (21) penetrates out from the through hole.
3. A laser doppler velocimeter as claimed in claim 2 wherein: the middle position of the stay cord (20) is provided with a support canvas (26), the surface of the support canvas (26) is provided with a level meter (27), the distance between the level meter (27) and the lasers (3) on two sides is the same, and the stay cord (20) is wound inwards by the inside of the scroll (21) through a torsion spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211256813.8A CN115639375B (en) | 2022-10-14 | 2022-10-14 | Laser Doppler velocimeter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211256813.8A CN115639375B (en) | 2022-10-14 | 2022-10-14 | Laser Doppler velocimeter |
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| CN115639375A CN115639375A (en) | 2023-01-24 |
| CN115639375B true CN115639375B (en) | 2024-05-07 |
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| CN202211256813.8A Active CN115639375B (en) | 2022-10-14 | 2022-10-14 | Laser Doppler velocimeter |
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Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB9409026D0 (en) * | 1994-05-06 | 1994-06-22 | Europ Gas Turbines Ltd | Laser doppler velocimeter |
| CN103018734A (en) * | 2012-12-05 | 2013-04-03 | 北京航空航天大学 | Clamping device of three-beam speed-measuring laser radar collimators |
| CN103968778A (en) * | 2014-06-04 | 2014-08-06 | 海克斯康测量技术(青岛)有限公司 | Detecting system with multiple laser devices |
| CN110230247A (en) * | 2019-06-20 | 2019-09-13 | 河南省高远公路养护技术有限公司 | A kind of road structure venereal disease evil detection device and method based on laser doppler technique |
| CN110806196A (en) * | 2019-11-28 | 2020-02-18 | 广东博智林机器人有限公司 | Laser level meter |
| CN111504286A (en) * | 2020-06-18 | 2020-08-07 | 南阳市规划设计院 | Fixed point surveying and mapping tool for building planning |
| CN213023203U (en) * | 2020-08-10 | 2021-04-20 | 中国科学院西安光学精密机械研究所 | Detection and calibration device for laser Doppler velocimeter |
| CN213773344U (en) * | 2020-10-14 | 2021-07-23 | 杨晓东 | Be used for ground stock to support protective structure |
| CN113596287A (en) * | 2021-06-22 | 2021-11-02 | 钟祥聚贤农业科技有限公司 | Ecological agriculture monitoring device and method |
| CN214750381U (en) * | 2021-03-22 | 2021-11-16 | 叶宗民 | Single-frequency laser Doppler transverse velocimeter based on grating technology |
| CN113885040A (en) * | 2021-09-30 | 2022-01-04 | 中国人民解放军国防科技大学 | Laser Doppler velocimeter for medium and long distance velocity measurement |
| CN114962874A (en) * | 2022-04-20 | 2022-08-30 | 特瑞拓软件(辽宁)有限公司 | Radar speed measuring equipment with mechanism is assembled to modularization |
| CN115015577A (en) * | 2022-07-04 | 2022-09-06 | 武汉新烽光电股份有限公司 | Double-beam laser Doppler velocimeter |
-
2022
- 2022-10-14 CN CN202211256813.8A patent/CN115639375B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB9409026D0 (en) * | 1994-05-06 | 1994-06-22 | Europ Gas Turbines Ltd | Laser doppler velocimeter |
| CN103018734A (en) * | 2012-12-05 | 2013-04-03 | 北京航空航天大学 | Clamping device of three-beam speed-measuring laser radar collimators |
| CN103968778A (en) * | 2014-06-04 | 2014-08-06 | 海克斯康测量技术(青岛)有限公司 | Detecting system with multiple laser devices |
| CN110230247A (en) * | 2019-06-20 | 2019-09-13 | 河南省高远公路养护技术有限公司 | A kind of road structure venereal disease evil detection device and method based on laser doppler technique |
| CN110806196A (en) * | 2019-11-28 | 2020-02-18 | 广东博智林机器人有限公司 | Laser level meter |
| CN111504286A (en) * | 2020-06-18 | 2020-08-07 | 南阳市规划设计院 | Fixed point surveying and mapping tool for building planning |
| CN213023203U (en) * | 2020-08-10 | 2021-04-20 | 中国科学院西安光学精密机械研究所 | Detection and calibration device for laser Doppler velocimeter |
| CN213773344U (en) * | 2020-10-14 | 2021-07-23 | 杨晓东 | Be used for ground stock to support protective structure |
| CN214750381U (en) * | 2021-03-22 | 2021-11-16 | 叶宗民 | Single-frequency laser Doppler transverse velocimeter based on grating technology |
| CN113596287A (en) * | 2021-06-22 | 2021-11-02 | 钟祥聚贤农业科技有限公司 | Ecological agriculture monitoring device and method |
| CN113885040A (en) * | 2021-09-30 | 2022-01-04 | 中国人民解放军国防科技大学 | Laser Doppler velocimeter for medium and long distance velocity measurement |
| CN114962874A (en) * | 2022-04-20 | 2022-08-30 | 特瑞拓软件(辽宁)有限公司 | Radar speed measuring equipment with mechanism is assembled to modularization |
| CN115015577A (en) * | 2022-07-04 | 2022-09-06 | 武汉新烽光电股份有限公司 | Double-beam laser Doppler velocimeter |
Non-Patent Citations (1)
| Title |
|---|
| 激光多普勒技术应用于圆管中流量测定的实验研究;杨诗通, 罗惕乾, 吴锤结;江苏大学学报(自然科学版);19880515(第03期);第11-18页 * |
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| CN115639375A (en) | 2023-01-24 |
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