CN102829738A - Measuring device for static-state inclination of voice coil motor - Google Patents

Measuring device for static-state inclination of voice coil motor Download PDF

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Publication number
CN102829738A
CN102829738A CN2011101638181A CN201110163818A CN102829738A CN 102829738 A CN102829738 A CN 102829738A CN 2011101638181 A CN2011101638181 A CN 2011101638181A CN 201110163818 A CN201110163818 A CN 201110163818A CN 102829738 A CN102829738 A CN 102829738A
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China
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laser
voice coil
coil motor
laser emission
reflecting surface
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CN2011101638181A
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CN102829738B (en
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徐茂国
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Hongfujin Precision Industry Shenzhen Co Ltd
Hon Hai Precision Industry Co Ltd
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Hongfujin Precision Industry Shenzhen Co Ltd
Hon Hai Precision Industry Co Ltd
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Abstract

A measuring device for static-state inclination of a voice coil motor comprises a laser transmission receiver, a fixing tool, a reflecting component and a processor, wherein the voice coil motor comprises a movable part; a laser transmission point and a laser sensing region are formed on one surface of the laser transmission receiver; the fixing tool is provided with a flat first reflection surface; the reflecting component is arranged on the movable part and is provided with a flat second reflecting surface, and the second reflecting surface is away from the laser transmission receiver at a certain distance and faces to the laser transmission receive; the second reflecting surface is used for reflecting the laser reaching the second reflecting surface to the laser sensing region, so that a spot is formed in the laser sensing region; the distance between the point of the laser reaching the second reflecting surface and the surface of the laser transmission receiver is h; and the processor calculate the distance s between the laser transmission point and the spot according to the coordinates of the laser transmission point and the coordinates of the spot, and calculates the static-state inclination according to the distance s and the distance h.

Description

Voice coil motor static tilt angles measurement mechanism
Technical field
The present invention relates to a kind of voice coil motor static tilt angles measurement mechanism.
Background technology
Automatically focusing camera module adopts voice coil motor as driver usually.Voice coil motor comprises the movable part that cooperates with lens barrel.The voice coil motor static tilt angles is meant when voice coil motor not being applied electric current, the angle between the central axis of voice coil motor movable part and the normal of reference planes.Reference planes often refer to the sensing face of CIS.
For desirable voice coil motor, static tilt angles should be zero.Static tilt angles is excessive, can influence the image quality of camera module.Therefore, before assembling camera module, be necessary the static tilt angles of voice coil motor is measured, whether meet the requirements to judge this voice coil motor.
Summary of the invention
In view of this, be necessary to provide a kind of voice coil motor static tilt angles measurement mechanism.
A kind of voice coil motor static tilt angles measurement mechanism comprises the Laser emission receiver, with the fixed jig that the surface of this Laser emission receiver is oppositely arranged, reflection part, processor.This voice coil motor comprises movable part, and this movable part is used for cooperating with lens barrel.A surface of this Laser emission receiver is provided with laser emission point and laser sensing area.This laser emission point is used to launch laser, and the laser sensing area is used for sensing and arrives this regional laser, and laser emission point is positioned at the laser sensing area.This laser emission point at this surperficial coordinate be (X0, Y0).Fixed jig has first a flat reflecting surface, and this first reflecting surface is towards this Laser emission receiver.This Laser emission receiver emitted laser is vertical with this first reflecting surface.This first reflecting surface has a presumptive area, and this fixed jig is used to carry this voice coil motor, and this voice coil motor bottom boundary overlaps with this presumptive area border.When the static tilt angles of this voice coil motor is zero, the central axes of this Laser emission receiver emitted laser and this movable part.This reflection part is placed on this movable part, and this reflection part has second a flat reflecting surface, and this second reflecting surface is provided with this Laser emission receiver mutually across a certain distance, and towards this Laser emission receiver.The normal of this second reflecting surface is parallel with the central axis of this movable part.This second reflecting surface is used for the laser-bounce that arrives this second reflecting surface to this laser sensing area, thereby forms a luminous point at this laser sensing area.This luminous point at this surperficial coordinate be (X1, Y1).Distance between the point of this second reflecting surface of laser arrival and the surface of this Laser emission receiver is h.This Laser emission receiver can be measured this distance h.This processor and this Laser emission receiver electrically connect; Thereby this Laser emission receiver can be with the coordinate (X0 of laser emission point; Y0) and the coordinate (X1 of this luminous point; Y1) send processor to; This processor according to formula
Figure 2011101638181100002DEST_PATH_IMAGE001
calculate between this laser emission point and this luminous point apart from s, and calculate the static tilt angles α of this voice coil motor according to following formula: α=0.5arctan (s/h).
Voice coil motor static tilt angles measurement mechanism of the present invention is simple in structure, and can measure the static tilt angles of voice coil motor easily.
Description of drawings
Fig. 1 is the schematic perspective view of the voice coil motor static tilt angles measurement mechanism of preferred embodiments of the present invention in user mode.
Fig. 2 is the schematic perspective view after fixed jig, support component and the reflection part of the measurement mechanism of voice coil motor and Fig. 1 assembled.
Fig. 3 is the decomposing schematic representation of Fig. 2.
Fig. 4 is the schematic diagram that the measurement mechanism of Fig. 1 calculates static tilt angles.
The main element symbol description
Voice coil motor static tilt angles measurement mechanism 10
Test component 11
Fixed jig 12
Processor 13
Load bearing component 14
Reflection part 15
Voice coil motor 20
Housing 22
Movable part 24
Through hole 242
Internal thread 2422
Support column 26
Base 112
The Laser emission receiver 114
Support bar 116
Boss 1122
First groove 122
Second groove 124
First reflecting surface 126
Presumptive area 128
Central axis 244
Main body 142
Projection 144
Normal 121
The surface 1142
Following embodiment will combine above-mentioned accompanying drawing to further specify the present invention.
Embodiment
To combine accompanying drawing and embodiment that the present invention is done further explain below.
Please consult Fig. 1-3 in the lump, voice coil motor static tilt angles measurement mechanism 10 comprises test component 11, fixed jig 12, processor 13, load bearing component 14 and reflection part 15.
Voice coil motor 20 comprises housing 22 and is arranged on the movable part 24 in the housing 22.Offer through hole 242 in the movable part 24, through hole 242 inside are provided with internal thread 2422, and through hole 242 is used for screwing togather with lens barrel (figure does not show).Four corners of voice coil motor 20 bottoms are respectively arranged with four support columns 26.
Test component 11 comprises base 112, Laser emission receiver 114 and support bar 116.Base 112 is rectangular parallelepipeds, and the center of base 112 is formed with boss 1122, and boss 1122 has flat surface, is used to carry fixed jig 12.Support bar 116 is vertically set on the base 112.Laser emission receiver 114 is fixedly installed on the support bar 116 through modes such as screws.Laser emission receiver 114 is provided with laser emission point and laser sensing area towards the surface 1142 of base 112.Laser emission point is used to launch laser, and the laser sensing area is used for sensing and arrives this regional laser, and laser emission point is positioned at the laser sensing area.
Fixed jig 12 is placed on the boss 1122, and is oppositely arranged with Laser emission receiver 114.Fixed jig 12 is a rectangular parallelepiped.The upper surface of fixed jig 12 offers rectangular first groove 122 and second a long and narrow groove 124.First groove 122 extends to the side that joins with this upper surface from this upper surface.First groove 122 and second groove 124 are used to accommodate the support column 26 of voice coil motor 20 bottoms, and limit the position of voice coil motor 20.Surface between first groove 122 and second groove 124 is first reflecting surface 126, and Laser emission receiver 114 emitted laser are vertical with first reflecting surface 126.In this embodiment; With first reflecting surface 126 face as a reference; Can think that it is equal to the sensing face of the CIS in the camera module; Therefore as long as measure the angle of normal 121 of central axis 244 and first reflecting surface 126 of movable part 24, this angle promptly can be thought the static tilt angles α of voice coil motor 20, and is as shown in Figure 4.In reality, static tilt angles α generally has only several years angle even littler, and for the convenience of setting forth, Fig. 4 has exaggerated static tilt angles α.First reflecting surface 126 has the presumptive area 128 with voice coil motor 20 bottom surface boundary matching.When border, static tilt angles null voice coil motor 20 bottom surface overlapped with the border of this presumptive area 128, Laser emission receiver 114 emitted laser overlapped with the central axis 244 of the movable part 24 of this voice coil motor 20.At this moment, laser after being reflected by first reflecting surface 126 returns former road, and the position that laser arrives at the laser sensing area overlaps with the position of laser emission point.In follow-up test, the position (that is the position of laser emission point) of this laser being arrived at the laser sensing area is set to reference point.
Load bearing component 14 is placed on the upper surface of movable part 24, is used for supporting reflex parts 15.Load bearing component 14 comprises columniform main body 142, and along 142 two orthogonal four projections 144 that radially stretch out respectively and form of main body.Projection 144 is used to be the movable part 24 that leans against voice coil motor 20.
Reflection part 15 is circular, has second a flat reflecting surface 152.This second reflecting surface 152 is used for laser-bounce to the laser sensing area that shines on it, forms a luminous point at the laser sensing area.In reality, should guarantee that this luminous point is formed in this laser sensing area.If luminous point is positioned at outside this laser sensing area, can changes the bigger Laser emission receiver of laser sensing region and test.The normal of second reflecting surface 152 is parallel with the central axis 244 of movable part 24.In this embodiment, the central axis of second reflecting surface 152 is parallel with the central axis 244 of movable part 24.Distance between the point of this second reflecting surface 152 of laser arrival and the surface 1142 of this Laser emission receiver 114 is h, and is as shown in Figure 4.At this embodiment, distance h is recorded by the principle of Laser emission receiver 114 according to laser ranging.Certainly, distance h also can be recorded by existing distance-measuring equipments such as ultrasonic range finders.Distance-measuring equipment can be arranged on the surface 1142 of Laser emission receiver 114.
Processor 13 electrically connects with Laser emission receiver 114, thereby Laser emission receiver 114 can send laser a little and the position of luminous point sends processor 13 to.Processor 13 send a little according to laser and the position calculation of luminous point between the two apart from s.Suppose that the coordinate that laser sends a little is (X0; Y0); The coordinate of luminous point is (X1; Y1), then can pass through following formula:
Figure 288825DEST_PATH_IMAGE001
apart from s.Then, as shown in Figure 4, processor 13 will calculate static tilt angles α apart from s, h substitution formula α=0.5arctan (s/h), and this static tilt angles α is exported to the user through output units such as display (figure does not show).Be appreciated that load bearing component 14 can omit, reflection part 15 directly is placed on the upper surface of movable part 24.
To explain below and how use voice coil motor static tilt angles measurement mechanism 10 measure static inclination angles:
Voice coil motor 20 is placed on the fixed jig 12, so that the border, bottom surface of voice coil motor 20 overlaps with the border of presumptive area 128;
Load bearing component 14 is placed on the upper surface of the movable part 24 of voice coil motor 20;
Reflection part 15 is placed on the load bearing component 14, and second reflecting surface 152 that makes reflection part 15 is towards Laser emission receiver 114, and the normal of second reflecting surface 152 is parallel with the central axis 244 of movable part 24;
Laser emission receiver 114 is to reflection part 15 emission beam of laser, and laser is reflected and is back to Laser emission receiver 114 after parts 15 reflections, the position of Laser emission receiver 114 sensing laser reentry points, and send this position to processor 13;
Processor 13 according between the position calculation laser reentry point of the position of laser emission point and luminous point and the reference point apart from s; To calculate static tilt angles α apart from s, h substitution formula α=0.5arctan (s/h) then, and this static tilt angles α will be exported to the user through output units such as display (figure does not show).
Voice coil motor static tilt angles measurement mechanism of the present invention is simple in structure, and can measure the static tilt angles of voice coil motor easily.In addition, those skilled in the art can also do other variation in spirit of the present invention, and certainly, these all should be included within the present invention's scope required for protection according to the variation that the present invention's spirit is done.

Claims (6)

1. voice coil motor static tilt angles measurement mechanism, this voice coil motor comprises movable part, and this movable part is used for cooperating with a lens barrel, and this voice coil motor static tilt angles measurement mechanism comprises:
The Laser emission receiver; A surface of this Laser emission receiver is provided with laser emission point and laser sensing area; This laser emission point is used to launch laser, and the laser sensing area is used for sensing and arrives this regional laser, and laser emission point is positioned at this laser sensing area; This laser emission point at this surperficial coordinate be (X0, Y0);
The fixed jig that is oppositely arranged with the surface of this Laser emission receiver; It has first a flat reflecting surface; This first reflecting surface is towards this Laser emission receiver, and this Laser emission receiver emitted laser is vertical with this first reflecting surface, and this first reflecting surface has a presumptive area; This fixed jig is used to carry this voice coil motor; And this voice coil motor bottom boundary overlaps with this presumptive area border, when the static tilt angles of this voice coil motor is zero, and the central axes of this Laser emission receiver emitted laser and this movable part;
Reflection part; This reflection part is placed on this movable part, and this reflection part has second a flat reflecting surface, and this second reflecting surface is provided with this Laser emission receiver mutually across a certain distance; And towards this Laser emission receiver; And the normal of this second reflecting surface is parallel with the central axis of this movable part, and this second reflecting surface is used for the laser-bounce that arrives this second reflecting surface to this laser sensing area, thereby forms a luminous point at this laser sensing area; This luminous point is (X1 at this surperficial coordinate; Y1), the distance between the point of this second reflecting surface of laser arrival and the surface of this Laser emission receiver is h, and this Laser emission receiver can be measured this distance h; And
Processor; This processor and this Laser emission receiver electrically connect; Thereby this Laser emission receiver can be with the coordinate (X0 of laser emission point; Y0) and the coordinate (X1 of this luminous point; Y1) send processor to; This processor according to formula
Figure 2011101638181100001DEST_PATH_IMAGE001
calculate between this laser emission point and this luminous point apart from s, and calculate the static tilt angles α of this voice coil motor according to following formula: α=0.5arctan (s/h).
2. voice coil motor static tilt angles measurement mechanism as claimed in claim 1 is characterized in that, this reflection part is circular.
3. voice coil motor static tilt angles measurement mechanism as claimed in claim 1 is characterized in that, this voice coil motor further comprises four support columns that are arranged on the bottom; This fixed jig comprises first surface; This first surface and this first reflecting surface coplane; This first surface offers rectangular first groove and second a long and narrow groove; This first groove extends to the side that joins with this first surface from this first surface surface, and this first groove all is used to accommodate this support column with this second groove.
4. voice coil motor static tilt angles measurement mechanism as claimed in claim 1; It is characterized in that; This voice coil motor static tilt angles measurement mechanism further comprises base and support bar, and this support bar is vertically set on this base, and this Laser emission receiver is fixedly installed on this support bar.
5. voice coil motor static tilt angles measurement mechanism as claimed in claim 4 is characterized in that the center of this base is formed with boss, and this boss has flat surface, and this surface is used to carry this fixed jig.
6. voice coil motor static tilt angles measurement mechanism as claimed in claim 4 is characterized in that this base is a rectangular parallelepiped.
CN201110163818.1A 2011-06-17 2011-06-17 Voice coil motor static tilt angles measurement mechanism Expired - Fee Related CN102829738B (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110017814A (en) * 2019-04-30 2019-07-16 深圳格兰达智能装备股份有限公司 A kind of inclined method and system of detection chip
CN111272394A (en) * 2020-02-25 2020-06-12 Oppo广东移动通信有限公司 Test method and test system
CN114877827A (en) * 2022-05-05 2022-08-09 华北电力科学研究院有限责任公司 Method and device for determining opening of baffle in thermal power plant

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09210682A (en) * 1996-02-06 1997-08-12 Ishikawajima Harima Heavy Ind Co Ltd Device for detecting inclination of road surface by laser
US5917600A (en) * 1997-06-18 1999-06-29 Cybo Robots, Inc Displacement sensor
CN101359078A (en) * 2007-07-30 2009-02-04 鸿富锦精密工业（深圳）有限公司 Centre justified fixtures and centre justified method
CN101586948A (en) * 2008-05-20 2009-11-25 鸿富锦精密工业（深圳）有限公司 Method for measuring inclination angle of lens module

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09210682A (en) * 1996-02-06 1997-08-12 Ishikawajima Harima Heavy Ind Co Ltd Device for detecting inclination of road surface by laser
US5917600A (en) * 1997-06-18 1999-06-29 Cybo Robots, Inc Displacement sensor
CN101359078A (en) * 2007-07-30 2009-02-04 鸿富锦精密工业（深圳）有限公司 Centre justified fixtures and centre justified method
CN101586948A (en) * 2008-05-20 2009-11-25 鸿富锦精密工业（深圳）有限公司 Method for measuring inclination angle of lens module

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110017814A (en) * 2019-04-30 2019-07-16 深圳格兰达智能装备股份有限公司 A kind of inclined method and system of detection chip
CN111272394A (en) * 2020-02-25 2020-06-12 Oppo广东移动通信有限公司 Test method and test system
CN111272394B (en) * 2020-02-25 2022-05-20 Oppo广东移动通信有限公司 Test method and test system
CN114877827A (en) * 2022-05-05 2022-08-09 华北电力科学研究院有限责任公司 Method and device for determining opening of baffle in thermal power plant
CN114877827B (en) * 2022-05-05 2024-01-26 华北电力科学研究院有限责任公司 Method and device for determining opening degree of baffle plate in thermal power plant

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