CN201392186Y - Swing angle precision detection device based on optical lever - Google Patents
Swing angle precision detection device based on optical lever Download PDFInfo
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- CN201392186Y CN201392186Y CN200920050649U CN200920050649U CN201392186Y CN 201392186 Y CN201392186 Y CN 201392186Y CN 200920050649 U CN200920050649 U CN 200920050649U CN 200920050649 U CN200920050649 U CN 200920050649U CN 201392186 Y CN201392186 Y CN 201392186Y
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- light source
- modulated light
- linear light
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Abstract
The utility model discloses a swing angle precision detection device based on optical lever, relating to the technical field of precision detection devices. The swing angle precision detection device comprises a frame, a camera fixed on a moving part of the platform under detection, a light barrier arranged above the camera for shielding one side of the camera, a linear light source arranged on the frame, above the light barrier, and a data processing device used for inducing the linear light source through the camera to acquire the length change of the light source and for calculating the deflection distance. The utility model adopts optical magnification method, without mechanical transmission, so the problems of transmission clearance and pitch error can be avoided. The swing angle precision detection device is less susceptible to external environment factors, high in precision, simple in structure and low in cost and can satisfy the detection requirement of precision equipment.
Description
Technical field
The utility model relates to accurate pick-up unit technical field, relates in particular to the pivot angle precision measurement apparatus based on optical lever.
Background technology
Along with the continuous progress of manufacturing technology, accurate manufacturing and detection technique are used more and more widely.As machine tool accuracy calibration, precision surface plate measurement of angle, the little displacement measurement of high precision, thermal deformation measurement, micromatic setting precision calibration etc.
In micro-displacement, angle displacement measurement field,, thereby reach the purpose of accurate measurement usually by micro-displacement or angle are amplified.In the prior art, treat the beat of lining platform by the method for mechanical drive amplification and measure, as using dial gauge, spiral dial gauge etc., platform to be measured comprises circular dividing table, deflection platform etc.; Dial gauge generally adopts gear, rack gear arrangement that small quantity is amplified.Because the method that mechanical drive is amplified problems such as drive gap, pitch error can occur inevitably, prior art is subjected to the external environment factor affecting big, and precision is not high enough, can't satisfy the detection requirement of precision equipment.
The utility model content
The utility model provides a kind of precision height, the pivot angle precision measurement apparatus based on optical lever simple in structure.
Pivot angle precision measurement apparatus based on optical lever, comprise frame, be fixed on camera on the moving component of platform to be measured, be positioned at the frequency modulated light plate that is used to block the first side of shooting directly over the camera, be positioned at the linear light source that is arranged on directly over the frequency modulated light plate on the frame, be used for responding to the data processing equipment that linear light source obtains linear light source variation length and is used to calculate deflection angle by camera, camera is electrically connected with data processing equipment; Wherein, deflection angle is, arctan (vertical range of beat distance/frequency modulated light plate and camera), beat distance=linear light source variation length * (1/ optical lever enlargement factor), the vertical range of the vertical range of optical lever enlargement factor=frequency modulated light plate and linear light source/frequency modulated light plate and camera.
Wherein, the frequency modulated light plate is arranged on the moving component by steady arm.
Wherein, the frequency modulated light plate is slidingly arranged on the steady arm.
Wherein, the frequency modulated light plate is arranged on the frame.
Wherein, the frequency modulated light plate is slidingly arranged on the frame.
Wherein, the optical lever enlargement factor is not less than 30.
Wherein, camera is a light power meter.
Wherein, be vertically installed with rule on the frame.
Wherein, data processing equipment is computer or single-chip microcomputer.
Wherein, linear light source is slidingly arranged on the frame.
From above technical scheme as can be seen, the utility model comprises frame, be fixed on camera on the moving component of platform to be measured, be positioned at the frequency modulated light plate that is used to block the first side of shooting directly over the camera, be positioned at the linear light source that is arranged on directly over the frequency modulated light plate on the frame, be used for responding to the data processing equipment that linear light source obtains linear light source variation length and is used to calculate deflection angle by camera, and camera is electrically connected with data processing equipment; Wherein, deflection angle is, arctan (vertical range of beat distance/frequency modulated light plate and camera), beat distance=linear light source variation length * (1/ optical lever enlargement factor), the vertical range of the vertical range of optical lever enlargement factor=frequency modulated light plate and linear light source/frequency modulated light plate and camera.The technical program adopts the optics amplification method, and there is not mechanical transmission, therefore do not have problems such as drive gap, pitch error, the utility model enlargement factor can very conveniently be regulated, applied widely, be subjected to the external environment factor affecting little, the precision height can satisfy the detection requirement of precision equipment, and simple in structure, production cost is low.
Description of drawings
Structural representation when Fig. 1 does not have beat for the utility model detects;
Structural representation when Fig. 2 for the utility model detects beat takes place.
Embodiment
Referring to Fig. 1 and Fig. 2, the utility model is described in detail below in conjunction with accompanying drawing.
The accurate pick-up unit of a kind of platform 15 straight line beats based on optical lever, comprise frame 10, be fixed on camera 16 on the moving component 14 of platform 15 to be measured, be positioned at the frequency modulated light plate 12 that is used to block camera 16 1 sides directly over the camera 16, be positioned at the linear light source 11 that is arranged on directly over the frequency modulated light plate 12 on the frame 10, be used for obtaining linear light source 11 variation lengths and being used to calculate the data processing equipment 17 of deflection angle by the linear light source 11 of camera 16 inductions, camera 16 is electrically connected with data processing equipment 17; Wherein, described deflection angle is, arctan (vertical range of beat distance/frequency modulated light plate 12 and camera 16), beat distance=linear light source 11 variation lengths * (1/ optical lever enlargement factor), optical lever enlargement factor=frequency modulated light plate 12 and the vertical range/frequency modulated light plate 12 of linear light source 11 and the vertical range of camera 16.The beat of present embodiment comprises beat distance and deflection angle, and they have corresponding relation.
The technical program adopts the optics amplification method, and does not have mechanical transmission, does not therefore have problems such as drive gap, pitch error; The utility model enlargement factor can very conveniently be regulated, and is applied widely; Be subjected to the external environment factor affecting little, the precision height can satisfy the high precision of precision equipment and the detection requirement of wide range; Adopt machine vision technique, can measure automatically, reduce the error that the traditional measurement instrument causes owing to artificial reading; And simple in structure, production cost is low.
Above-mentioned camera 16 can be the intelligent video camera head 16 with image analysis function; Also can be camera 16 systems of micro computer composition.Certainly, above-mentioned camera 16 can be light power meter, can also can respond to the equipment that linear light source 11 obtains linear light source 11 variation lengths for other.Above-mentioned data processing equipment 17 can be computer or single-chip microcomputer.
In the present embodiment, frequency modulated light plate 12 is arranged on the moving component 14 by steady arm 13; For making frequency modulated light plate 12 adjustable with the vertical range of camera 16, frequency modulated light plate 12 is slidingly arranged on the steady arm 13, and frequency modulated light plate 12 can move up and down along steady arm 13.As another embodiment, frequency modulated light plate 12 is arranged on the frame 10; For making frequency modulated light plate 12 adjustable with the vertical range of camera 16, frequency modulated light plate 12 is slidingly arranged on the frame 10; Frequency modulated light plate 12 can move up and down along frame 10.
In the present embodiment, adjustable with the vertical range of linear light source 11 for making frequency modulated light plate 12, linear light source 11 is slidingly arranged on the frame 10, and linear light source 11 can move up and down along frame 10.
In the present embodiment, optical lever enlargement factor=frequency modulated light plate 12 and the vertical range/frequency modulated light plate 12 of linear light source 11 and the vertical range of camera 16 by regulating the position of frequency modulated light plate 12 and/or linear light source 11, just can be adjusted the optical lever enlargement factor.Concerning precision equipment, beat is often very little, and this just requires enough big optical lever enlargement factor, and the optical lever enlargement factor of present embodiment is not less than 30, is preferably 100; Certainly, can also be set to other enlargement factor.
In the present embodiment, be vertically installed with rule 18 on the frame 10.Staff's reference mark chi 18 can conveniently be adjusted the position of frequency modulated light plate 12 and/or linear light source 11, thereby realizes adjusting the optical lever enlargement factor.
In the present embodiment, the 14 a certain moment of moving component move to a certain position of platform 15 to be measured, and frequency modulated light plate 12 blocks camera 16 1 sides, and camera 16 can only be responded to the part length of illumination of linear light source 11 in this moment.Moving component 14 moves on platform 15 to be measured, and when beat not taking place, linear light source 11 length of illumination that camera 16 is sensed are invariable; When beat takes place when, linear light source 11 length of illumination that camera 16 is sensed change, according to above-mentioned formula, beat distance=linear light source 11 variation lengths * (1/ optical lever enlargement factor), can calculate the beat distance, deflection angle=arctan (vertical range of beat distance/frequency modulated light plate and camera) can calculate deflection angle.When beat took place, tested platform 15 surperficial angle of eccentricity changed, and made the optical axis generation beat of camera 16, and the linear direction of linear light source 11 is consistent with the beat direction.
In the computing formula of above-mentioned beat distance, linear light source 11 variation lengths are at platform to be measured 15 certain position, linear light source 11 variation lengths in platform to be measured 15 certain position=(linear light source 11 length of platform 15 original positions to be measured-linear light source 11 length in platform to be measured 15 certain position), when moving component 14 moves to a certain position of platform 15 to be measured, camera 16 is sensed linear light source 11 length of illumination of this position constantly at this, can calculate the beat distance and the deflection angle of platform to be measured 15 certain position, moving component 14 moves along platform 15 to be measured, can calculate the beat of each position of platform 15 to be measured continuously, thereby detect the beat of whole platform to be measured 15.The define method of linear light source 11 length of platform 15 original positions to be measured has two kinds, method one is defined as the length of linear light source 11 when beat not taking place, and is datum length, this method can detect each actual eccentricities constantly, and present embodiment adopts this method; Method two is defined as the length of the linear light source 11 of last camera 16 inductions, and this method shows that certain is constantly with respect to last one constantly eccentricities; These two kinds of define methods respectively have its using value.Linear light source 11 variation lengths in platform to be measured 15 certain position may be positive number or negative, thereby platform 15 beat directions to be measured are described; Shown in Fig. 2, frequency modulated light plate 12 blocks the left side of camera 16, when linear light source 11 variation lengths are positive number, illustrates that platform 15 to be measured is to the bottom right beat.
If frequency modulated light plate 12 is b with the vertical range of linear light source 11, frequency modulated light plate 12 is a with the vertical range of camera 16, and then optical lever enlargement factor f is b/a; If linear light source 11 length of platform 15 original positions to be measured (adopting the datum length that beat does not take place here) are k1, linear light source 11 length in platform to be measured 15 certain position are k2, and linear light source 11 variation lengths in platform then to be measured 15 certain position are (k1-k2); Be (k1-k2) * (a/b) thereby obtain the beat distance h, deflection angle θ is arctan h/a.
Above content only is preferred embodiment of the present utility model, for those of ordinary skill in the art, according to thought of the present utility model, the part that all can change in specific embodiments and applications, this description should not be construed as restriction of the present utility model.
Claims (8)
1. based on the pivot angle precision measurement apparatus of optical lever, it is characterized in that, comprise frame, be fixed on camera on the moving component of platform to be measured, be positioned at the frequency modulated light plate that is used to block the first side of shooting directly over the camera, be positioned at the linear light source that is arranged on directly over the frequency modulated light plate on the frame, be used for responding to the data processing equipment that linear light source obtains linear light source variation length and is used to calculate deflection angle by camera, camera is electrically connected with data processing equipment; Wherein, described deflection angle is, arctan (beat distance)/(vertical range of frequency modulated light plate and camera), beat distance=(linear light source variation length) * (1/ optical lever enlargement factor), optical lever enlargement factor=(vertical range of frequency modulated light plate and linear light source)/(vertical range of frequency modulated light plate and camera).
2. pivot angle precision measurement apparatus according to claim 1 is characterized in that, described frequency modulated light plate is arranged on the described moving component by steady arm.
3. pivot angle precision measurement apparatus according to claim 2 is characterized in that, described frequency modulated light plate is slidingly arranged on the described steady arm.
4. pivot angle precision measurement apparatus according to claim 1 is characterized in that, described frequency modulated light plate is arranged on the described frame.
5. pivot angle precision measurement apparatus according to claim 4 is characterized in that, described frequency modulated light plate is slidingly arranged on the described frame.
6. pivot angle precision measurement apparatus according to claim 1 is characterized in that, described optical lever enlargement factor is not less than 30.
7. pivot angle precision measurement apparatus according to claim 1 is characterized in that, described camera is a light power meter.
8. pivot angle precision measurement apparatus according to claim 1 is characterized in that, is vertically installed with rule on the described frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920050649U CN201392186Y (en) | 2009-01-20 | 2009-01-20 | Swing angle precision detection device based on optical lever |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920050649U CN201392186Y (en) | 2009-01-20 | 2009-01-20 | Swing angle precision detection device based on optical lever |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201392186Y true CN201392186Y (en) | 2010-01-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200920050649U Expired - Fee Related CN201392186Y (en) | 2009-01-20 | 2009-01-20 | Swing angle precision detection device based on optical lever |
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| CN (1) | CN201392186Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103063189A (en) * | 2013-01-07 | 2013-04-24 | 中国科学院云南天文台 | Goniometer verification method based on optical lever |
| CN109916278A (en) * | 2019-04-15 | 2019-06-21 | 周光耀 | Lever camber angle rectifier |
-
2009
- 2009-01-20 CN CN200920050649U patent/CN201392186Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103063189A (en) * | 2013-01-07 | 2013-04-24 | 中国科学院云南天文台 | Goniometer verification method based on optical lever |
| CN109916278A (en) * | 2019-04-15 | 2019-06-21 | 周光耀 | Lever camber angle rectifier |
| CN109916278B (en) * | 2019-04-15 | 2024-03-15 | 厦门周功机械设备有限公司 | Lever type camber angle corrector |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100127 Termination date: 20130120 |