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CN110702040A - Multi-angle parallel calibration device - Google Patents

Multi-angle parallel calibration device Download PDF

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Publication number
CN110702040A
CN110702040A CN201910822717.7A CN201910822717A CN110702040A CN 110702040 A CN110702040 A CN 110702040A CN 201910822717 A CN201910822717 A CN 201910822717A CN 110702040 A CN110702040 A CN 110702040A
Authority
CN
China
Prior art keywords
laser
cross rod
calibration device
angle parallel
parallel calibration
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201910822717.7A
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Chinese (zh)
Inventor
张超
李志远
赵佳
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JA Xingtai Solar Co Ltd
Original Assignee
JA Xingtai Solar Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by JA Xingtai Solar Co Ltd filed Critical JA Xingtai Solar Co Ltd
Priority to CN201910822717.7A priority Critical patent/CN110702040A/en
Publication of CN110702040A publication Critical patent/CN110702040A/en
Pending legal-status Critical Current

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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00Measuring arrangements characterised by the use of optical techniques
    • G01B11/26Measuring arrangements characterised by the use of optical techniques for measuring angles or tapers; for testing the alignment of axes
    • G01B11/27Measuring arrangements characterised by the use of optical techniques for measuring angles or tapers; for testing the alignment of axes for testing the alignment of axes

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Length Measuring Devices By Optical Means (AREA)

Abstract

The invention discloses a multi-angle parallel calibration device, which comprises a support, a laser source and a laser transmission mechanism, wherein the laser source and the laser transmission mechanism are respectively in a pair, the support mainly comprises a lifting upright post and a fixed cross rod, the fixed cross rod is connected with the upright post through a rotating mechanism, two laser transmitters respectively and correspondingly emit a pair of parallel laser beams through a laser transmission mechanism, and the pair of laser transmission mechanisms are respectively installed on the fixed cross rod in a sliding manner and can move along the fixed cross rod in the length direction. The invention adopts two parallel laser beams, adjusts the positions of the laser beams by moving up and down, moving left and right and rotating, can realize the parallel calibration between two measured objects in any different spaces, and has high calibration precision, convenient use and high working efficiency.

Description

Multi-angle parallel calibration device
Technical Field
The invention relates to a multi-angle parallel calibration device.
Background
In the production operation, it is often necessary to calibrate whether two objects to be measured are parallel, for example, parallel calibration of a moving mechanism, including a single moving mechanism (e.g., whether belts are parallel during the operation process, and whether a driving belt and a driven belt are parallel) and two or more mechanisms operating in coordination (e.g., whether two belt rollers are parallel), and also in some cases, whether the side lines of the objects to be measured are parallel, for example, whether two long sides of a battery string are parallel.
At present, a device for calibrating whether two measured objects are parallel or not is not available, and a commonly used level meter can only measure the straightness of the object, and if the two measured objects are level and are on the same straight line, the two measured objects cannot be calibrated whether to be parallel or not.
Disclosure of Invention
The invention aims to provide a multi-angle parallel calibration device which can realize parallel calibration between measured objects, and has the advantages of high calibration precision, convenience in use and high efficiency.
The object of the invention is achieved by the following technical measures: the utility model provides a parallel calibrating device of multi-angle which characterized in that: it includes support, laser source and laser transmission mechanism are a pair of respectively, the support mainly comprises stand and fixed horizontal pole of liftable, fixed horizontal pole pass through rotary mechanism with the stand is connected, and two laser emitter correspond respectively and penetrate a pair of parallel laser beam simultaneously through a laser transmission mechanism, should to laser transmission mechanism respectively slidable mounting be in on the fixed horizontal pole and can follow fixed horizontal pole and remove on its length direction.
The multi-angle parallel calibration of the invention refers to the calibration of whether two measured objects in any different space are parallel or not.
The invention adopts two parallel laser beams, adjusts the positions of the laser beams by moving up and down, moving left and right and rotating, can realize the parallel calibration between two measured objects in any different spaces, and has high calibration precision, convenient use and high working efficiency.
In one embodiment of the present invention, each laser source and its corresponding laser transmission mechanism are integrally arranged to form a laser transmitter.
As another embodiment of the present invention, each laser source is a laser emitter, the laser emitter is fixed on the fixed cross bar, the laser transmission mechanism is a plane mirror, the plane mirror forms an included angle of 45 degrees with the vertical plane, and the laser emitter emits laser beams along the transverse direction so that the laser beams enter the plane mirror at an included angle of 45 degrees.
Each plane mirror is positioned at the outer side or the inner side of the corresponding laser transmitter.
The two laser transmission mechanisms are respectively arranged on a movable cross rod, the two movable cross rods are respectively arranged at two ends of a fixed cross rod, one of the fixed cross rod and the movable cross rod is a sleeve, the other one of the fixed cross rod and the movable cross rod is an inner sleeve rod, and the inner sleeve rod is arranged in the sleeve to realize the transverse movement of the movable cross rod.
The multi-angle parallel calibration device also comprises a horizontal test bench for detecting the integral level of the device, wherein the horizontal test bench is arranged on the top end of the upright post, and the horizontal test bench adopts a level bubble to carry out horizontal calibration.
The rotating mechanism is a rotating joint rotatably mounted on the side surface of the upright post, and the fixed cross rod is detachably connected with the rotating joint.
The upright column mainly comprises a hollow loop bar and an inner telescopic bar, wherein the lower end of the inner telescopic bar is arranged in the hollow loop bar, the inner telescopic bar can move in the vertical direction and is positioned through a positioning structure, and the rotary joint is arranged on the inner telescopic bar.
The positioning structure comprises positioning holes and positioning pieces, wherein the positioning holes are distributed on the circumference of the side wall of the hollow loop bar, and the positioning pieces penetrate through the positioning holes and extend into the hollow loop bar to tightly push the inner telescopic bar to position the inner telescopic bar.
The lower end of the hollow loop bar is connected with a supporting base for supporting the whole device.
Compared with the prior art, the invention has the following remarkable effects:
⑴ the invention adopts two parallel laser beams, adjusts the position of the laser beam by moving up and down, moving left and right and rotating, can realize the parallel calibration between two measured objects in any different space, and has high calibration precision, convenient use and high working efficiency.
⑵ the invention has simple structure, low cost, small size, and convenient carrying.
Drawings
The invention is described in further detail below with reference to the figures and the specific embodiments.
FIG. 1 is an exploded view of the structure of the present invention;
fig. 2 is an assembly view of the structure of the present invention.
Detailed Description
As shown in fig. 1 and 2, the multi-angle parallel calibration device of the present invention comprises a pair of laser sources and a pair of laser transmission mechanisms, wherein the pair of laser sources and the pair of laser transmission mechanisms are respectively provided, the support mainly comprises a liftable upright post and a fixed cross bar 1, the fixed cross bar 1 is connected with the upright post through a rotating mechanism, the two laser sources respectively and correspondingly emit a pair of parallel laser beams through a laser transmission mechanism, and the pair of laser transmission mechanisms are respectively slidably mounted on the fixed cross bar 1 and can move along the fixed cross bar 1 in the length direction. The stand mainly comprises cavity loop bar 2 and interior telescopic link 3, and the lower extreme of interior telescopic link 3 is arranged in cavity loop bar 2, and interior telescopic link 3 can be in vertical upward movement and pass through location structure location. The positioning structure comprises positioning holes 10 and positioning pieces, wherein the positioning holes 10 are distributed on the circumference of the side wall of the hollow loop bar 2, and the positioning pieces penetrate through the positioning holes 10 and extend into the hollow loop bar 2 to tightly push the inner telescopic bar 3 for positioning. The lower end of the hollow stem 2 is flanged to a support base 11 having three legs.
In this embodiment, the laser source is laser emitter 4, laser emitter 4 is fixed on the intermediate position of fixed horizontal pole 1, it is fixed specifically through 7 centre gripping laser emitter 4 of anchor clamps, laser emitter 4 both ends have an emission mouth 6 respectively, laser transmission mechanism is plane mirror 5, two plane mirrors 5 divide the both sides of locating laser emitter 4, plane mirror 5 is 45 degrees contained angles with vertical plane, laser emitter 4 makes it be 45 degrees contained angles with plane mirror along horizontal transmission laser beam and jets into. Specifically, two plane mirrors 5 are respectively arranged on a movable cross rod 7, the two movable cross rods 7 are respectively arranged at two ends of a fixed cross rod 1, the fixed cross rod 1 is an inner loop bar, the movable cross rod 7 is a sleeve, and the inner loop bar is arranged in the sleeve to realize the transverse movement of the movable cross rod 7. The rod end of the movable cross rod 7 is provided with a placing frame 12 for placing the plane reflector 5, the placing frame 12 is a bent block body, and an accommodating groove 13 is arranged in the placing frame to enable the plane reflector 5 to form a 45-degree included angle with a vertical plane. The movable cross rod 7 is provided with a limiting hole 14, and the limiting part penetrates into the limiting hole 14 and extends into the movable cross rod 7 to jack the fixed cross rod 1 for positioning.
Still including being used for detecting the whole horizontally horizontal test bench 8 of this device, horizontal test bench 8 adopts the air level to carry out the level calibration on locating the top of interior telescopic link 3 on the horizontal test bench 8.
In this embodiment, rotary mechanism rotates rotary joint 9 of installing on the 3 lateral walls of interior telescopic link, and rotary joint 9 has the draw-in groove, and 1 joint of fixed horizontal pole is in the draw-in groove for fixed horizontal pole 1 is connected for dismantling with rotary joint 9.
The multi-angle parallel calibration device is supported by a supporting base with three supporting legs, the height is adjusted by up-down lifting of an inner telescopic rod, the transverse distance is adjusted by a movable cross rod, the angle is adjusted by a rotating mechanism, when the calibration device completely meets the test requirement, a laser transmitter is started, a laser beam is sent to a movement mechanism to be measured by two 45-degree plane reflectors at two sides for calibration, for example, the horizontal calibration of a single mechanism, such as the parallel calibration in the running process of a belt, namely, one laser beam is ensured to be coincident or parallel with one side edge of the belt, and the calibration is carried out by observing whether the other laser beam is parallel or coincident with one side edge of the belt; for another example, the parallel calibration of two or more mechanisms which act in coordination, such as the parallel calibration of two belt rollers, namely, firstly ensuring that one laser beam is coincident with or parallel to the central line of one belt roller, and carrying out calibration by observing whether the other laser beam is parallel with or coincident with the central line of the other belt roller; for example, the two long sides of the battery string are horizontally calibrated, namely, one laser beam is ensured to be coincident with or parallel to one long side of the battery string, and the other laser beam is observed to be parallel with or coincident with the other long side of the battery string to perform calibration.
In other embodiments, each laser source and the corresponding laser transmission mechanism are integrally arranged to form a laser emitter, and each laser emitter is arranged on a movable cross rod and directly emits laser beams through the laser.
In other embodiments, each plane mirror is located outside or inside its corresponding laser emitter.
In other embodiments, the laser delivery mechanism may also employ other mirrors that reflect the laser beam.
In other embodiments, the upright post may adopt other existing lifting structures besides the loop bar type structure.
The present invention is not limited to the above embodiments, and various other modifications, substitutions and alterations can be made without departing from the basic technical concept of the present invention by the common technical knowledge and conventional means in the field according to the above content of the present invention.

Claims (10)

1. The utility model provides a parallel calibrating device of multi-angle which characterized in that: it includes support, laser source and laser transmission mechanism are a pair of respectively, the support mainly comprises stand and fixed horizontal pole of liftable, fixed horizontal pole pass through rotary mechanism with the stand is connected, and two laser sources correspond respectively and penetrate a pair of parallel laser beam simultaneously through a laser transmission mechanism, should to laser transmission mechanism respectively slidable mounting be in on the fixed horizontal pole and can follow fixed horizontal pole and remove on its length direction.
2. The multi-angle parallel calibration device of claim 1, wherein: each laser source and the corresponding laser transmission mechanism are integrally arranged to form a laser transmitter.
3. The multi-angle parallel calibration device of claim 1, wherein: every laser source is a laser emitter, laser emitter fixes on the fixed horizontal pole, laser transmission device is the plane mirror, the plane mirror is 45 degrees contained angles with vertical plane, laser emitter makes it be 45 degrees contained angles with the plane mirror along horizontal transmission laser beam and jets into.
4. The multi-angle parallel calibration device of claim 3, wherein: each plane mirror is located outside or inside its corresponding laser transmitter.
5. The multi-angle parallel calibration device of claim 3, wherein: two laser transmission mechanisms are respectively arranged on a movable cross rod, the two movable cross rods are respectively arranged at two ends of the fixed cross rod, one of the fixed cross rod and the movable cross rod is a sleeve, the other one of the fixed cross rod and the movable cross rod is an inner loop rod, and the inner loop rod is arranged in the sleeve to realize the transverse movement of the movable cross rod.
6. The multi-angle parallel calibration device according to any one of claims 1 to 5, wherein: the multi-angle parallel calibration device further comprises a horizontal test bench used for detecting the whole level of the device, the horizontal test bench is arranged on the top end of the stand column, and the horizontal test bench adopts a level bubble to perform horizontal calibration.
7. The multi-angle parallel calibration device of claim 6, wherein: the rotating mechanism is a rotating joint rotatably mounted on the side face of the upright post, and the fixed cross rod is detachably connected with the rotating joint.
8. The multi-angle parallel calibration device of claim 7, wherein: the stand mainly comprises cavity loop bar and interior telescopic link, the lower extreme of interior telescopic link is arranged in the cavity loop bar, interior telescopic link can be in vertical upward movement and pass through location structure location, rotary joint installs on the interior telescopic link.
9. The multi-angle parallel calibration device of claim 8, wherein: the positioning structure comprises positioning holes and positioning pieces, the positioning holes are distributed on the circumference of the side wall of the hollow loop bar, and the positioning pieces penetrate through the positioning holes and stretch into the hollow loop bar to tightly push the inner telescopic bar to position the hollow loop bar.
10. The multi-angle parallel calibration device of claim 9, wherein: the lower end of the hollow loop bar is connected with a supporting base for supporting the whole device.
CN201910822717.7A 2019-09-02 2019-09-02 Multi-angle parallel calibration device Pending CN110702040A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910822717.7A CN110702040A (en) 2019-09-02 2019-09-02 Multi-angle parallel calibration device

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Application Number Priority Date Filing Date Title
CN201910822717.7A CN110702040A (en) 2019-09-02 2019-09-02 Multi-angle parallel calibration device

Publications (1)

Publication Number Publication Date
CN110702040A true CN110702040A (en) 2020-01-17

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111380487A (en) * 2020-04-22 2020-07-07 中国电建集团贵州电力设计研究院有限公司 A U-shaped rod aligner and using method
CN112284296A (en) * 2020-11-05 2021-01-29 中国烟草总公司郑州烟草研究院 Measuring device and method for projector workbench movement precision calibration
CN113805303A (en) * 2021-09-03 2021-12-17 浙江可胜技术股份有限公司 Heliostat mirror body installation device
CN114061456A (en) * 2021-11-17 2022-02-18 业成科技(成都)有限公司 Size detection device
CN115247397A (en) * 2021-04-28 2022-10-28 广东博智林机器人有限公司 Positioning device and marking equipment
CN115494483A (en) * 2022-09-08 2022-12-20 北京曼德克环境科技有限公司 A laser vehicle detection and calibration device and calibration method

Citations (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1052734A (en) * 1989-12-21 1991-07-03 清华大学 Laser parallel degree and verticality measuring instrument and measuring method thereof
SU1693374A1 (en) * 1989-06-26 1991-11-23 Новосибирский институт инженеров геодезии, аэрофотосъемки и картографии Device for controlling parallelism of axes of objects
CN101298982A (en) * 2008-07-02 2008-11-05 瑞安市瑞光光电仪器有限公司 Method and instrument for calibrating rotary shaft coaxiality
CN202204510U (en) * 2011-05-05 2012-04-25 富港电子(昆山)有限公司 Laser leveler
CN102818543A (en) * 2012-08-20 2012-12-12 北京理工大学 Target free multi-optical axis parallelism detection system based on digital image
CN202749405U (en) * 2012-06-12 2013-02-20 晶澳太阳能有限公司 Novel movable storage support dedicated to solar cell sheets
CN202748031U (en) * 2012-06-20 2013-02-20 浙江吉利汽车研究院有限公司杭州分公司 Laser head fixing bracket
CN103398676A (en) * 2013-08-13 2013-11-20 中航虹波风电设备有限公司 Detection method for parallelism and coaxiality of flanges at two ends of pylon
TW201423034A (en) * 2012-12-07 2014-06-16 Univ Nat Formosa Verticality and parallelism detection system and detection method thereof
US20170016743A1 (en) * 2015-07-17 2017-01-19 Leica Geosystems Ag Calibration device and calibration method for a laser beam horizontal trueness testing device
CN106802412A (en) * 2017-01-23 2017-06-06 南京大学 A kind of closely movable positioning system and its method based on laser and wireless technology
CN107101536A (en) * 2017-06-16 2017-08-29 成都安的光电科技有限公司 Parallelism Control System of Laser Optical Axis and Target Tracking Optical Axis
CN206891353U (en) * 2017-05-17 2018-01-16 广东一鼎科技有限公司 A kind of measurement frock of the depth of parallelism
CN207095517U (en) * 2017-02-28 2018-03-13 北京卓力新航科技有限责任公司 Cannon multibarrel axis parallel degree optical alignment set
CN207963767U (en) * 2018-02-27 2018-10-12 苏州市计量测试研究所 A kind of vertical tool preseting measuring instrument means of alignment
CN108801179A (en) * 2018-06-27 2018-11-13 大连理工大学 A kind of non-contact axis coaxality measuring mechanism and method at a distance
CN108844498A (en) * 2015-08-24 2018-11-20 江苏理工学院 Double-laser artillery barrel inner bore straightness detection equipment
CN109596083A (en) * 2018-11-07 2019-04-09 中国航空工业集团公司西安飞机设计研究所 Guiding tool for field calibration linear movement pick-up
CN109875586A (en) * 2017-12-06 2019-06-14 深圳市巨烽显示科技有限公司 Double excitation calibration apparatus and method

Patent Citations (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU1693374A1 (en) * 1989-06-26 1991-11-23 Новосибирский институт инженеров геодезии, аэрофотосъемки и картографии Device for controlling parallelism of axes of objects
CN1052734A (en) * 1989-12-21 1991-07-03 清华大学 Laser parallel degree and verticality measuring instrument and measuring method thereof
CN101298982A (en) * 2008-07-02 2008-11-05 瑞安市瑞光光电仪器有限公司 Method and instrument for calibrating rotary shaft coaxiality
CN202204510U (en) * 2011-05-05 2012-04-25 富港电子(昆山)有限公司 Laser leveler
CN202749405U (en) * 2012-06-12 2013-02-20 晶澳太阳能有限公司 Novel movable storage support dedicated to solar cell sheets
CN202748031U (en) * 2012-06-20 2013-02-20 浙江吉利汽车研究院有限公司杭州分公司 Laser head fixing bracket
CN102818543A (en) * 2012-08-20 2012-12-12 北京理工大学 Target free multi-optical axis parallelism detection system based on digital image
TW201423034A (en) * 2012-12-07 2014-06-16 Univ Nat Formosa Verticality and parallelism detection system and detection method thereof
CN103398676A (en) * 2013-08-13 2013-11-20 中航虹波风电设备有限公司 Detection method for parallelism and coaxiality of flanges at two ends of pylon
US20170016743A1 (en) * 2015-07-17 2017-01-19 Leica Geosystems Ag Calibration device and calibration method for a laser beam horizontal trueness testing device
CN108844498A (en) * 2015-08-24 2018-11-20 江苏理工学院 Double-laser artillery barrel inner bore straightness detection equipment
CN106802412A (en) * 2017-01-23 2017-06-06 南京大学 A kind of closely movable positioning system and its method based on laser and wireless technology
CN207095517U (en) * 2017-02-28 2018-03-13 北京卓力新航科技有限责任公司 Cannon multibarrel axis parallel degree optical alignment set
CN206891353U (en) * 2017-05-17 2018-01-16 广东一鼎科技有限公司 A kind of measurement frock of the depth of parallelism
CN107101536A (en) * 2017-06-16 2017-08-29 成都安的光电科技有限公司 Parallelism Control System of Laser Optical Axis and Target Tracking Optical Axis
CN109875586A (en) * 2017-12-06 2019-06-14 深圳市巨烽显示科技有限公司 Double excitation calibration apparatus and method
CN207963767U (en) * 2018-02-27 2018-10-12 苏州市计量测试研究所 A kind of vertical tool preseting measuring instrument means of alignment
CN108801179A (en) * 2018-06-27 2018-11-13 大连理工大学 A kind of non-contact axis coaxality measuring mechanism and method at a distance
CN109596083A (en) * 2018-11-07 2019-04-09 中国航空工业集团公司西安飞机设计研究所 Guiding tool for field calibration linear movement pick-up

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111380487A (en) * 2020-04-22 2020-07-07 中国电建集团贵州电力设计研究院有限公司 A U-shaped rod aligner and using method
CN112284296A (en) * 2020-11-05 2021-01-29 中国烟草总公司郑州烟草研究院 Measuring device and method for projector workbench movement precision calibration
CN115247397A (en) * 2021-04-28 2022-10-28 广东博智林机器人有限公司 Positioning device and marking equipment
CN115247397B (en) * 2021-04-28 2023-09-26 广东博智林机器人有限公司 Positioning device and scribing equipment
CN113805303A (en) * 2021-09-03 2021-12-17 浙江可胜技术股份有限公司 Heliostat mirror body installation device
CN114061456A (en) * 2021-11-17 2022-02-18 业成科技(成都)有限公司 Size detection device
CN114061456B (en) * 2021-11-17 2023-08-25 业成科技(成都)有限公司 Size detection device
CN115494483A (en) * 2022-09-08 2022-12-20 北京曼德克环境科技有限公司 A laser vehicle detection and calibration device and calibration method
CN115494483B (en) * 2022-09-08 2024-12-31 北京曼德克环境科技有限公司 Laser vehicle type detection and calibration device and calibration method

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