CN117086426B - Self-balancing method of laser radar rotating part based on brazing mechanism - Google Patents
Self-balancing method of laser radar rotating part based on brazing mechanism Download PDFInfo
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- CN117086426B CN117086426B CN202311357543.4A CN202311357543A CN117086426B CN 117086426 B CN117086426 B CN 117086426B CN 202311357543 A CN202311357543 A CN 202311357543A CN 117086426 B CN117086426 B CN 117086426B
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- Prior art keywords
- groove
- lidar
- rotor
- rotating
- self
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- 238000005219 brazing Methods 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims abstract description 25
- 230000007246 mechanism Effects 0.000 title claims abstract description 18
- 238000010438 heat treatment Methods 0.000 claims abstract description 30
- 239000007787 solid Substances 0.000 claims abstract description 30
- 229910000679 solder Inorganic materials 0.000 claims abstract description 17
- 239000007769 metal material Substances 0.000 claims abstract description 11
- 238000009826 distribution Methods 0.000 claims abstract description 8
- 239000007788 liquid Substances 0.000 claims abstract description 8
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 21
- 229910052751 metal Inorganic materials 0.000 claims description 11
- 239000002184 metal Substances 0.000 claims description 11
- 230000003287 optical effect Effects 0.000 claims description 11
- 238000002844 melting Methods 0.000 claims description 9
- 230000008018 melting Effects 0.000 claims description 9
- 239000000945 filler Substances 0.000 claims description 6
- 238000003754 machining Methods 0.000 claims description 3
- 238000009966 trimming Methods 0.000 claims 1
- 238000005299 abrasion Methods 0.000 abstract description 3
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 description 7
- 239000005751 Copper oxide Substances 0.000 description 7
- 229910000431 copper oxide Inorganic materials 0.000 description 7
- 239000000463 material Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 229910000838 Al alloy Inorganic materials 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- GSJBKPNSLRKRNR-UHFFFAOYSA-N $l^{2}-stannanylidenetin Chemical compound [Sn].[Sn] GSJBKPNSLRKRNR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K1/00—Soldering, e.g. brazing, or unsoldering
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K3/00—Tools, devices, or special appurtenances for soldering, e.g. brazing, or unsoldering, not specially adapted for particular methods
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacture Of Motors, Generators (AREA)
- Testing Of Balance (AREA)
Abstract
The invention discloses a self-balancing method of a laser radar rotating part based on a brazing mechanism, which comprises the steps of arranging an annular closed groove on a rotor part of a laser radar; a heating device is arranged outside the part where the groove is positioned at the same height of the plane where the groove is positioned; arranging a plurality of solid solder balls with diameters smaller than the width of the groove in the groove; rotating the rotor, wherein the solid solder balls roll in the grooves, so that the rotor realizes automatic adjustment of mass distribution; after the rotor rotates to reach a self-balancing state, starting a non-contact heating device, and transmitting energy into the metal material groove and the solid solder ball to realize heating; heating until the solid solder balls are completely melted into liquid, and stopping heating; after the liquid solder solidifies and is fixed with the groove, the rotor stops rotating, and the whole mass of the rotating part is balanced. The invention realizes fine balancing by utilizing a brazing mechanism, reduces the negative influence of the residual unbalance of the coarse balancing of the rotor, reduces the abrasion of the bearing and prolongs the service life of the laser radar.
Description
Technical Field
The invention discloses a dynamic balance accurate balancing method, and particularly relates to a self-balancing method of a laser radar rotating component based on a brazing mechanism.
Background
The lidar is a radar system that detects a characteristic quantity such as a position, a speed, etc. of a target by emitting a laser beam. The working principle is that a detection signal is transmitted to a target, then the received signal reflected/scattered back from the target is compared with the transmitted signal, and after proper processing, the related information of the target, such as parameters of the distance, azimuth, altitude, speed, gesture, even shape and the like of the target, can be obtained, so that the target is detected, tracked and identified.
There are various methods for realizing scanning by the laser radar, including motor driving rotary mirror/drum rotary scanning, motor driving transmitting/receiving module rotary scanning, MEMS vibrating mirror swing scanning, motor driving optical wedge rotary scanning, optical phased array scanning, etc. The rotating scanning scheme based on motor driving is the most mature and has wide application.
The shape and the mass distribution of a rotating part (a rotor part) driven by a motor are irregular and symmetrical, and initial unbalance caused by tiny mass distribution unevenness can cause severe vibration and high decibel noise in the high-speed rotation process of the motor, so that the realization of radar ranging performance is finally influenced, and meanwhile, the service life of the radar is shortened and the application experience of a user is reduced. Therefore, the dynamic balance balancing of the rotating component is required to be introduced in the implementation process of the actual radar rotating scanning scheme, and the dynamic balance balancing is realized by adding weight or reducing weight to a specific position of the rotating component based on the measurement of the rotating unbalance value of the dynamic balance equipment. This work involves balancing surface reservation of the rotating parts, initial weight distribution design, and table-by-table balancing operations on the dynamic balancing device. The gradual balancing operation process is complex, time and labor are consumed, the difficulty of radar manufacturing realization is increased, and the cost is increased. Meanwhile, pollution and damage of internal components of the radar are extremely easy to cause in the weight increasing/reducing process, and limited compensation of unbalanced quantity can be realized finally, so that complete balance of dynamic balance can not be realized.
Disclosure of Invention
The invention aims to provide a self-balancing method of a laser radar rotating part based on a brazing mechanism, which can minimize negative effects such as vibration and noise caused by residual unbalance of a rotor in a relatively ideal balance state (initial unbalance is controlled), reduce abrasion of a bearing and prolong the service life of a laser radar.
In order to solve the technical problems, the technical scheme of the invention is as follows: a self-balancing method of a lidar rotating component based on a brazing mechanism, comprising the steps of:
a rotor part of the laser radar takes a rotating shaft as a center, and an annular closed groove is arranged in a plane perpendicular to the rotating shaft;
arranging a non-contact heating device outside the part where the groove is positioned at the same height of the plane where the groove is positioned;
arranging a plurality of solid solder balls with diameters smaller than the width of the groove in the groove; the size and the quality of each solid solder ball are consistent;
rotating the rotor, wherein the solid solder balls roll in the grooves, so that the rotor realizes automatic adjustment of mass distribution;
after the rotor rotates to reach a self-balancing state, starting heating equipment, and transmitting energy to the grooves made of metal materials and the solid solder balls for heating;
heating until the solid solder balls are completely melted into liquid, and stopping heating;
and after the liquid brazing filler metal is solidified and welded and fixed with the grooves, stopping rotating the rotor, and balancing the whole mass of the rotating part.
The heating device is not in contact with the part where the groove is located.
The parts where the grooves are positioned are made of metal materials and are formed by machining.
A metallic material having brazing property, such as copper oxide, is fitted in the groove.
The laser radar using the self-balancing method of the laser radar rotating component based on the brazing mechanism comprises an optical cover assembly, a reflecting mirror group, a solid tin ball, a code disc, a motor and a bottom shell which are sequentially arranged from top to bottom; the bottom shell is used as a laser radar main body, a rotating part is arranged on the inner side of the bottom shell, and comprises a reflecting mirror group, a solid tin ball, a coded disc and a motor, wherein the bottom of the inner side of the bottom shell is connected with the motor; the top of the motor is provided with a rotor and is connected with the code disc to drive the code disc to rotate; digging an annular closed groove on the top of the code disc in a plane perpendicular to the rotating shaft by taking the rotating shaft as the center; a plurality of solid tin balls with diameters smaller than the width of the groove are arranged in the groove; the top of the code disc is connected with a reflecting mirror group; the optical cover component is connected with the top of the bottom shell to form a closed laser radar.
A heating device (such as a hot air gun) is arranged outside the code disc, and the heating device is not contacted with the code disc.
The material of the code wheel is metal with heat conduction property.
A metal material having brazability with the brazing filler metal, such as copper oxide, is fitted into the groove.
The reflector group, the motor and the rotor are made of materials with melting point higher than tin or materials insensitive to heating.
When the self-balancing method of the laser radar rotating component based on the rotating brazing mechanism is used, the self-balancing method is in a laser radar tooling stage, and the laser radar is not provided with an optical cover assembly.
Compared with the prior art, the invention has the beneficial effects that:
1. on the basis of fine design of rotor mass distribution, the invention solves the problem of residual unbalance introduced by factors such as machining, manufacturing, bonding, inconsistent quality of standard components and the like, realizes quick self balancing and improves the efficiency of radar production and manufacturing.
2. The invention can minimize negative effects such as vibration, noise and the like caused by residual unbalance of the rotor in a relatively ideal balance state, reduce abrasion of the bearing, prolong the service life of the laser radar and promote the use experience of radar users.
Drawings
FIG. 1 is an exploded view of a lidar in an embodiment of the present invention;
FIG. 2 is a top view of a code wheel according to an embodiment of the present invention;
FIG. 3 is a schematic cross-sectional view of the A-A plane in FIG. 2 according to an embodiment of the present invention;
in the figure, a 1-optical cover assembly, a 2-reflecting mirror group, a 3-solid tin ball, a 4-code disc, a 5-motor and a 6-bottom shell are arranged.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention. In addition, the technical features of the embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
The technical scheme of the invention is as follows: a self-balancing method of a lidar rotating component based on a brazing mechanism, comprising the steps of:
firstly, digging an annular closed groove on the top of a code wheel 4 of the laser radar by taking a rotating shaft as a center in a plane vertical to the rotating shaft;
secondly, arranging a heating device outside the code disc 4 at the same height of the plane where the groove is positioned;
thirdly, arranging a plurality of solid tin balls 3 with diameters smaller than the width of the groove in the groove; the size and the quality of each solid tin ball 3 are consistent;
fourthly, rotating the rotor, and enabling the solid tin balls 3 to roll in the grooves, so that the rotor can realize automatic adjustment of mass distribution and self-balancing;
fifthly, after the rotor rotates to reach a self-balancing state, starting heating equipment to transfer energy to the grooves made of metal materials and the solid tin balls 3 for heating;
step six, heating until the solid tin ball 3 is completely melted into liquid tin, and stopping heating;
and seventh, after the liquid tin is solidified and welded and fixed with the groove, stopping rotating the rotor, and balancing the whole mass of the rotating part.
As shown in fig. 1 to 3, there is also provided a laser radar using the above-described self-balancing method of a laser radar rotating member based on a brazing mechanism, comprising an optical cover assembly 1, a mirror group 2, a solid solder ball 3, a code wheel 4, a motor 5 and a bottom case 6, which are sequentially arranged from top to bottom; wherein, the bottom shell 6 is taken as a laser radar main body, a rotating part is arranged on the inner side of the bottom shell, the rotating part comprises a reflecting mirror group 2, a solid tin ball 3, a code disc 4 and a motor 5, and the bottom of the inner side of the bottom shell 6 is connected with the motor 5; the top of the motor 5 is provided with a rotor and is connected with the code disc 4 to drive the code disc 4 to rotate; digging an annular closed groove on the top of the code disc 4 by taking the rotating shaft as the center in a plane perpendicular to the rotating shaft on the code disc 4; a plurality of solid tin balls 3 with diameters smaller than the width of the groove are arranged in the groove; the top of the code disc 4 is connected with the reflector group 2; the optical cover assembly 1 is connected with the top of the bottom shell 6 to form a closed laser radar.
A heating device is arranged outside the code wheel 4, and the heating device is not contacted with the code wheel 4.
The code wheel 4 is made of metal (such as aluminum alloy) with heat conduction property.
A metallic material having solderability to tin (e.g., copper oxide) is used in the grooves.
The mirror group 2, the motor 5 and the rotor are made of a material with a melting point higher than tin or a material insensitive to heating.
When the self-balancing method of the laser radar rotating part based on the brazing mechanism is used, the self-balancing method is in a laser radar tooling stage, and the laser radar is not provided with the optical cover assembly 1.
After the rotary part is self-balancing and fixed, vibration and noise are reduced when the rotor of the motor 5 rotates at a high speed (a supercritical rotation speed) again.
The melting point of Tin (Tin) is about 231.9 degrees celsius at standard pressure, the melting point of aluminum alloy is 660 degrees celsius, and the melting point of copper oxide is about 1000 degrees celsius.
The whole of the rotor code wheel 4 is made of aluminum alloy, and the groove is made of copper oxide, so that the copper oxide has good brazability, and the solid tin ball 3 can be well welded with the copper oxide.
Other metals having good brazability and a higher melting point than tin may be used in the grooves.
It will be readily appreciated by those skilled in the art that the foregoing description is merely a preferred embodiment of the invention and is not intended to limit the invention, but any modifications, equivalents, improvements or alternatives falling within the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (10)
1. A self-balancing method of a lidar rotating component based on a brazing mechanism, comprising the steps of:
a rotor part of the laser radar takes a rotating shaft as a center, and an annular closed groove is arranged in a plane perpendicular to the rotating shaft;
arranging a non-contact heating device outside the part where the groove is positioned at the same height of the plane where the groove is positioned;
arranging a plurality of solid solder balls with diameters smaller than the width of the groove in the groove; the size and the quality of each solid solder ball are consistent;
the rotor works at the rotating speed of normal working of the radar, and the solid solder balls roll freely in the grooves, so that the rotor realizes automatic adjustment of mass distribution;
after the rotor rotates to reach a self-balancing state, starting a non-contact heating device, and transmitting energy into a groove made of metal and a solid solder ball for heating;
heating until the solid solder balls are completely melted into liquid, and stopping heating;
and after the liquid brazing filler metal is solidified and welded and fixed with the grooves, stopping rotating the rotor, and finishing fine balancing of the whole mass of the rotating part.
2. The method of self-balancing a lidar rotating component based on a brazing mechanism according to claim 1, wherein the heating means is not in contact with the component in which the groove is located.
3. The method for self-balancing a lidar rotating component based on the brazing mechanism according to claim 1, wherein the component where the groove is located is made of metal and can conduct heat.
4. The self-trimming method of a lidar rotating member based on the brazing mechanism according to claim 1, wherein the melting point temperature of the metal material at the contact part of the groove and the brazing filler metal is higher than the melting point temperature of the brazing filler metal, and the brazing filler metal has weldability.
5. A lidar using the self-balancing method of the lidar rotating member based on the brazing mechanism according to claim 1, which is characterized by comprising an optical cover assembly, a reflector group, a solid solder ball, a code wheel, a motor and a bottom shell which are sequentially arranged from top to bottom; the bottom shell is used as a laser radar main body, a rotating part is arranged on the inner side of the bottom shell, and comprises a reflecting mirror group, a solid tin ball, a coded disc and a motor, wherein the bottom of the inner side of the bottom shell is connected with the motor; the top of the motor is provided with a rotor and is connected with the code disc to drive the code disc to rotate; digging an annular closed groove on the top of the code disc by taking the rotating shaft as the center in a plane vertical to the rotating shaft; a plurality of solid tin balls with diameters smaller than the width of the groove are arranged in the groove; the top of the code disc is connected with a reflecting mirror group; the optical cover component is connected with the top of the bottom shell to form a closed laser radar.
6. The lidar of claim 5, wherein the heating device is arranged at the outer edge of the code wheel at the same height of the plane of the groove, and the heating device is not contacted with the code wheel.
7. The lidar of claim 5, wherein the code wheel is made of a metal material by machining.
8. The lidar according to claim 5, wherein a metal material having brazing property is fitted in the groove.
9. The lidar of claim 5, wherein the trench is formed from a metal material having a melting point higher than tin.
10. The lidar of claim 5, wherein the self-balancing method of the lidar rotating component based on the rotation brazing mechanism of claim 1 is used in a lidar tooling stage when the lidar is not equipped with an optical cover assembly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311357543.4A CN117086426B (en) | 2023-10-19 | 2023-10-19 | Self-balancing method of laser radar rotating part based on brazing mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311357543.4A CN117086426B (en) | 2023-10-19 | 2023-10-19 | Self-balancing method of laser radar rotating part based on brazing mechanism |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN117086426A CN117086426A (en) | 2023-11-21 |
| CN117086426B true CN117086426B (en) | 2024-02-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311357543.4A Active CN117086426B (en) | 2023-10-19 | 2023-10-19 | Self-balancing method of laser radar rotating part based on brazing mechanism |
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| Country | Link |
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| CN (1) | CN117086426B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11317416A (en) * | 1998-03-05 | 1999-11-16 | Tokyo Tungsten Co Ltd | Composite microball, and manufacture of the same and device thereof |
| CN102489810A (en) * | 2011-12-23 | 2012-06-13 | 哈尔滨工业大学 | Method for self-assembling micro-electromechanical system (MEMS) based on solder ball laser remelting process |
| CN103611997A (en) * | 2013-11-08 | 2014-03-05 | 安泰科技股份有限公司 | Automatic distribution unit for brazing diamond bits |
| JP2014167156A (en) * | 2013-01-31 | 2014-09-11 | Nippon Handa Kk | Method of producing solder alloy fine particle, solder alloy particle, solder paste, and electronic apparatus |
| CN106312358A (en) * | 2016-09-30 | 2017-01-11 | 河南科技大学 | Automatic shredding type solder ball manufacturing equipment and method |
| CN212652852U (en) * | 2020-09-09 | 2021-03-05 | 天津航天机电设备研究所 | Circumferential turntable positioning tool for waveguide brazing |
| CN113977460A (en) * | 2021-10-29 | 2022-01-28 | 贵州捷盛钻具股份有限公司 | Hollow long drill rod polishing machine |
| CN114833411A (en) * | 2022-06-06 | 2022-08-02 | 重庆科技学院 | Electronic packaging BGA tin ball welding method and device based on electromagnetic pulse heating |
-
2023
- 2023-10-19 CN CN202311357543.4A patent/CN117086426B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11317416A (en) * | 1998-03-05 | 1999-11-16 | Tokyo Tungsten Co Ltd | Composite microball, and manufacture of the same and device thereof |
| CN102489810A (en) * | 2011-12-23 | 2012-06-13 | 哈尔滨工业大学 | Method for self-assembling micro-electromechanical system (MEMS) based on solder ball laser remelting process |
| JP2014167156A (en) * | 2013-01-31 | 2014-09-11 | Nippon Handa Kk | Method of producing solder alloy fine particle, solder alloy particle, solder paste, and electronic apparatus |
| CN103611997A (en) * | 2013-11-08 | 2014-03-05 | 安泰科技股份有限公司 | Automatic distribution unit for brazing diamond bits |
| CN106312358A (en) * | 2016-09-30 | 2017-01-11 | 河南科技大学 | Automatic shredding type solder ball manufacturing equipment and method |
| CN212652852U (en) * | 2020-09-09 | 2021-03-05 | 天津航天机电设备研究所 | Circumferential turntable positioning tool for waveguide brazing |
| CN113977460A (en) * | 2021-10-29 | 2022-01-28 | 贵州捷盛钻具股份有限公司 | Hollow long drill rod polishing machine |
| CN114833411A (en) * | 2022-06-06 | 2022-08-02 | 重庆科技学院 | Electronic packaging BGA tin ball welding method and device based on electromagnetic pulse heating |
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| CN117086426A (en) | 2023-11-21 |
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