CN204101009U - A kind of measurement mechanism determining angle position - Google Patents
A kind of measurement mechanism determining angle position Download PDFInfo
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- CN204101009U CN204101009U CN201420648317.1U CN201420648317U CN204101009U CN 204101009 U CN204101009 U CN 204101009U CN 201420648317 U CN201420648317 U CN 201420648317U CN 204101009 U CN204101009 U CN 204101009U
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Abstract
The utility model relates to a kind of device utilizing photovalve measure angular positions.Its objective is a kind of measurement mechanism determining angle position that a kind of structure is simple, cost is low in order to provide, accuracy of detection is high.A kind of measurement mechanism determining angle position of the utility model, comprise sensor board, anti-dazzling screen, four photoelectric cells and light source, described sensor board offers through hole, described four photoelectric cells between two one group be arranged on sensor board with through hole center line Central Symmetry, the motor shaft of motor to be detected is through through hole, described light source is arranged on the axial line extended line of motor shaft, described anti-dazzling screen is divided into two fan-shaped shields, two described fan-shaped shields are symmetrical with machine shaft eccentric axial for the center of circle with motor shaft axle center, described anti-dazzling screen is between photoelectric cell and light source, described four photoelectric cells are rectangle, the spot diameter of described light source projects on photoelectric cell is not more than the diameter of the fan-shaped matte outer of described anti-dazzling screen.
Description
Technical field
The utility model relates to a kind of pick-up unit, particularly relates to a kind of device utilizing photovalve measure angular positions.
Background technology
Ration angle-position detection device is mainly used to accurate measurement rotary part being carried out to angle, relates to a large amount of engineer applied.Such as rotor position measurement etc. is carried out to oscillating motor.The implementation of angle-measuring equipment has many kinds, and often kind of a mode has relative merits, needs to select different angle measurement modes for different application feature.Along with laser galvanometer is in the continuous expansion of industry manufacture, medical and beauty treatment and scientific research military field range of application, the core component " scan module " as laser galvanometer serves more and more important effect.In the actual use procedure of scan module, angle displacement sensor a kind ofly utilizes the angle of motor shaft to change to detect eyeglass swing position, thus by position signal acquisition to the device in computing control system.
Rotary transformer angle-measuring equipment, because be unsuitable for some industrial environment to magnetic-field-sensitive, utilizes slide rheostat angle measurement also because contact resistance and life problems can not in many applications.And the scan module that current domestic whole laser industry uses, adopt capacitance type angle displacement transducer mostly, assembly technology is complicated, volume is large, temperature resistance floats poor performance, speed is low, failure rate is high, and butterfly shape capacitor dielectric sheet has the moment of inertia of can not ignore, when motor is towards miniaturization, become the restraining factors that of motor speed is important, can only be adapted at using in low and middle-end mark market, the utilization demand of all clients can not be met.The applications such as the special medical and beauty treatment at high-precision laser marking, small size and OCT Ophthalmologic apparatus, traditional capacitance sensor, because shortcomings such as repetitive positioning accuracy is low, poor anti jamming capability, more and more can not meet the demand of higher-end businesses.
The scan module of American-European countries all adopts the sector structure photoelectric cell of specialty customization as its position detecting device, a kind of pick-up unit determining angle and position of rotating element is disclosed see US Patent No. 5844673, four that wherein adopt fan-shaped photoelectric cells are as light source receiving device, butterfly anti-dazzling screen is provided with between light source and photoelectric cell, butterfly anti-dazzling screen is arranged on motor shaft ends, drive anti-dazzling screen to rotate when motor shaft rotates, along with anti-dazzling screen rotates, photoelectric cell surface receives the region area generation linear change of light, thus the output current produced also changes, the angle position that motor shaft rotates can be detected according to photoelectric cell output current value.This pick-up unit needs to customize special sectored light battery, the cost of customization is higher, and it is too wide that fan-shaped full phase size can not be done, because unnecessary exposed region can produce unnecessary system noise, therefore very high requirement is proposed to fan-shaped photronic processing and installation.
Summary of the invention
The technical problems to be solved in the utility model is to provide a kind of measurement mechanism determining angle position that a kind of structure is simple, cost is low, accuracy of detection is high.
A kind of measurement mechanism determining angle position of the utility model, comprise sensor board, anti-dazzling screen, four photoelectric cells and light source, described sensor board offers through hole, described four photoelectric cells between two one group be arranged on sensor board with through hole center line Central Symmetry, the motor shaft of motor to be detected is through through hole, described light source is arranged on the axial line extended line of motor shaft, described anti-dazzling screen is divided into two fan-shaped shields, two described fan-shaped shields are symmetrical with machine shaft eccentric axial for the center of circle with motor shaft axle center, described anti-dazzling screen is between photoelectric cell and light source, described four photoelectric cells are rectangle, the spot diameter of described light source projects on photoelectric cell is not more than the diameter of the fan-shaped matte outer of described anti-dazzling screen.
A kind of measurement mechanism determining angle position of the utility model, wherein said light source is arranged in photoelectricity end cap, and described photoelectricity end cap is fixedly mounted on bottom motor casing, and the lead-in wire of described light source is welded on sensor board; Described photoelectricity end cap light source transmitting aperture is bellmouth, and this bellmouth tapering is not more than (R-r)/H, and wherein R is the diameter of the fan-shaped matte outer of anti-dazzling screen, and r is the diameter of light source, and H is light source and photronic vertical range.
A kind of measurement mechanism determining angle position of the utility model, the material of wherein said photoelectricity end cap is black engineering plastics.
A kind of measurement mechanism determining angle position of the utility model, wherein said photoelectric cell adopts four-quadrant photodiode.
A kind of measurement mechanism determining angle position of the utility model, the distance between wherein said anti-dazzling screen and photoelectric sensor is 0.2mm ~ 0.4mm.
A kind of measurement mechanism determining angle position of the utility model, the material of wherein said anti-dazzling screen is alloy-steel sheet.
A kind of measurement mechanism determining angle position of the utility model, wherein said motor shaft is arranged in motor casing by bearing, and described sensor board is fixedly mounted on bottom motor casing.
The utility model is a kind of determines that the measurement mechanism difference from prior art of angle position is: one, and the utility model changes the photronic shape be arranged on sensor board, and common rectangle changed into by photoelectric cell of the present utility model; Its two, the projection scope of the utility model to light source limits, and the spot diameter of light source projects on photoelectric cell that the utility model uses controls the diameter of the fan-shaped matte outer for being not more than described anti-dazzling screen.First from the utility model technique effect: owing to spot size being controlled in the diameter range of the fan-shaped matte outer of anti-dazzling screen, even if therefore photoelectric cell has become common rectangle, when reality detects, the part that photoelectric cell is exposed in illumination range still linearly changes, system noise can not be produced, or the system noise produced in allowed limits, continue to maintain the stability that the applications such as the high-precision mark performance of industrial manufacturing and medical research work long hours.Secondly from technical difficulty of the present utility model: on the one hand, the common rectangular light battery that the utility model adopts more existing sectored light battery on difficulty of processing is easily a lot, and installation difficulty also has substantial degradation; On the other hand, the technology controlled by spot size in the diameter range of the fan-shaped matte outer of anti-dazzling screen is also easy to realize.Finally, be produced into originally from of the present utility model: what adopt due to pick-up unit of the present utility model is common rectangular light battery, saves the producing cost of 2/3.
Spot size controls to realize in the following way in the diameter range of the fan-shaped matte outer of anti-dazzling screen by the utility model: photoelectricity end cap light source transmitting aperture is bellmouth, and this bellmouth tapering is not more than (R-r)/H, wherein R is the diameter of the fan-shaped matte outer of anti-dazzling screen, r is the diameter of light source, H is light source and photronic vertical range, because photoelectricity end cap is injection mo(u)lding, so, be easy to the form parameter calculating photoelectricity end cap, compared to fan-shaped photronic technology, save production cost, reduce production difficulty, improve work efficiency.
Determine that the measurement mechanism of angle position is described further below in conjunction with accompanying drawing to the utility model is a kind of.
Accompanying drawing explanation
Fig. 1 is a kind of front sectional view determining the measurement mechanism of angle position of the utility model;
Fig. 2 is a kind of upward view determining sensor board in the measurement mechanism of angle position of the utility model;
Fig. 3 is a kind of upward view determining anti-dazzling screen in the measurement mechanism of angle position of the utility model;
To be that the utility model is a kind of determine the facula position schematic diagram of light source projects on photoelectric cell in the measurement mechanism of angle position to Fig. 4.
Embodiment
As shown in Figure 1, Figure 2, Figure 3 shows, the utility model is a kind of determines that the measurement mechanism of angle position comprises sensor board 1, alloy-steel sheet material anti-dazzling screen 3, four rectangular light batteries 9,10,11,12 and light source 6.Sensor board 1 offers through hole 8, photoelectric cell 9,10,11,12 adopts four-quadrant photodiode, four photoelectric cells 9,10,11,12 between two one group be arranged on sensor board 1 with through hole 8 center line Central Symmetry, sensor board 1 is fixedly mounted on bottom motor casing 2.The motor shaft 4 of motor to be detected is arranged in motor casing 2 through through hole 8 by bearing, and light source 6 is arranged on the axial line extended line of motor shaft 4.Anti-dazzling screen 3 is divided into two fan-shaped shields, two fan-shaped shields are symmetrical with motor shaft 4 eccentric axial for the center of circle with motor shaft 4 axle center, anti-dazzling screen 3 photoelectric cell 9,10, between 11,12 and light source 6, the distance between anti-dazzling screen 3 and photoelectric cell 9,10,11,12 is 0.2mm ~ 0.4mm.Light source 6 is arranged in the photoelectricity end cap 5 of black engineering plastics material, and photoelectricity end cap 5 is fixedly mounted on bottom motor casing 2, and the lead-in wire 7 of light source 6 is welded on sensor board 1; Photoelectricity end cap 5 light source transmitting aperture 51 is bellmouth, and this bellmouth tapering is not more than (R-r)/H, wherein R is the diameter of the fan-shaped matte outer of anti-dazzling screen 3, H is the vertical range of light source 6 and photoelectric cell 9,10,11,12, parameters relationship can be learnt thus, as shown in Figure 4, light source 6 hot spot 13 diameter be incident upon on photoelectric cell 9,10,11,12 is not more than the diameter of the fan-shaped matte outer of anti-dazzling screen 3.
When starter motor, light source 6 through light source transmitting aperture 51 at four photoelectric cells 9, 10, 11, a hot spot 13 is formed on 12, and the diameter of this hot spot 13 is less than the diametrically outer of anti-dazzling screen 3, along with motor shaft 4 drives anti-dazzling screen 3 to rotate, the photoelectric cell 9 at two diagonal angles, facula area on 11 increases, the photoelectric cell 10 at two other diagonal angle, facula area on 12 reduces, due to four photoelectric cells 9, 10, 11, 12 diagonal angles are in parallel, therefore the photoelectric cell 9 at diagonal angle each other, 10, 11, 12 respectively form a sensor pair, when the right output of one of them sensor increases, the right output of another sensor can reduce.The right output of two sensors is connected to two input ends of a differential amplifier respectively, will export the bipolarity electric signal linearly changed with motor shaft 4 angle, just can measure the angle position of motor shaft 4 thus.
Light source transmitting aperture 51 of the present utility model is bellmouth, and this bellmouth tapering is not more than (R-r)/H, wherein R is the diameter of the fan-shaped matte outer of anti-dazzling screen 3, and r is the diameter of light source 6, H is the vertical range of light source 6 and photoelectric cell 9,10,11,12, because photoelectricity end cap 5 is injection mo(u)lding, so, be easy to the form parameter calculating photoelectricity end cap 5, compared to fan-shaped photronic technology, save production cost, reduced production difficulty, improve work efficiency.Control in the diameter range of the fan-shaped matte outer of anti-dazzling screen 3 based on light source 6 projected spot 13 size, the shape of the photoelectric cell 9,10,11,12 be arranged on sensor board 1 is set to common rectangle, its more existing sectored light battery on difficulty of processing is easily a lot, and installation difficulty also has substantial degradation; And when reality detects, photoelectric cell 9,10,11,12 part be exposed in illumination range still linearly changes, system noise can not be produced, or the system noise produced in allowed limits, continue to maintain the stability that the applications such as the high-precision mark performance of industrial manufacturing and medical research work long hours.
Above-described embodiment is only be described preferred implementation of the present utility model; not scope of the present utility model is limited; under the prerequisite not departing from the utility model design spirit; the various distortion that those of ordinary skill in the art make the technical solution of the utility model and improvement, all should fall in protection domain that the utility model claims determine.
Claims (7)
1. determine the measurement mechanism of angle position for one kind, comprise sensor board, anti-dazzling screen, four photoelectric cells and light source, described sensor board offers through hole, described four photoelectric cells between two one group be arranged on sensor board with through hole center line Central Symmetry, the motor shaft of motor to be detected is through through hole, described light source is arranged on the axial line extended line of motor shaft, described anti-dazzling screen is divided into two fan-shaped shields, two described fan-shaped shields are symmetrical with machine shaft eccentric axial for the center of circle with motor shaft axle center, described anti-dazzling screen is between photoelectric cell and light source, it is characterized in that: described four photoelectric cells are rectangle, the spot diameter of described light source projects on photoelectric cell is not more than the diameter of the fan-shaped matte outer of described anti-dazzling screen.
2. a kind of measurement mechanism determining angle position according to claim 1, it is characterized in that: described light source is arranged in photoelectricity end cap, described photoelectricity end cap is fixedly mounted on bottom motor casing, and the lead-in wire of described light source is welded on sensor board; Described photoelectricity end cap light source transmitting aperture is bellmouth, and this bellmouth tapering is not more than (R-r)/H, and wherein R is the diameter of the fan-shaped matte outer of anti-dazzling screen, and r is the diameter of light source, and H is light source and photronic vertical range.
3. a kind of measurement mechanism determining angle position according to claim 2, is characterized in that: the material of described photoelectricity end cap is black engineering plastics.
4. a kind of measurement mechanism determining angle position according to claim 1, is characterized in that: described photoelectric cell adopts four-quadrant photodiode.
5. a kind of measurement mechanism determining angle position according to claim 1, is characterized in that: the distance between described anti-dazzling screen and photoelectric sensor is 0.2mm ~ 0.4mm.
6. a kind of measurement mechanism determining angle position according to claim 1, is characterized in that: the material of described anti-dazzling screen is alloy-steel sheet.
7., according to a kind of measurement mechanism determining angle position one of claim 1 to 6 Suo Shu, it is characterized in that: described motor shaft is arranged in motor casing by bearing, described sensor board is fixedly mounted on bottom motor casing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420648317.1U CN204101009U (en) | 2014-11-03 | 2014-11-03 | A kind of measurement mechanism determining angle position |
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| CN201420648317.1U CN204101009U (en) | 2014-11-03 | 2014-11-03 | A kind of measurement mechanism determining angle position |
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| CN204101009U true CN204101009U (en) | 2015-01-14 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104330100A (en) * | 2014-11-03 | 2015-02-04 | 镇江金海创科技有限公司 | Measuring device for determining angle position |
| CN109029298A (en) * | 2018-09-09 | 2018-12-18 | 扬州大学 | A kind of pair of magnetic suspension spherical joint carries out the detection device and its detection method of optoelectronic angle numerical value |
| CN110530256A (en) * | 2019-09-30 | 2019-12-03 | 长春理工大学 | A kind of laser angle measuring system based on four-quadrant photo detector |
-
2014
- 2014-11-03 CN CN201420648317.1U patent/CN204101009U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104330100A (en) * | 2014-11-03 | 2015-02-04 | 镇江金海创科技有限公司 | Measuring device for determining angle position |
| CN109029298A (en) * | 2018-09-09 | 2018-12-18 | 扬州大学 | A kind of pair of magnetic suspension spherical joint carries out the detection device and its detection method of optoelectronic angle numerical value |
| CN110530256A (en) * | 2019-09-30 | 2019-12-03 | 长春理工大学 | A kind of laser angle measuring system based on four-quadrant photo detector |
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Address after: 212000 Zhenjiang city in Jiangsu province by fifteen Dingmao Road No. 99 C District 29 Patentee after: Jiangsu Jin Hai Chuang Technology Co., Ltd. Address before: 212000 Zhenjiang city in Jiangsu province by fifteen Dingmao Road No. 99 C District 29 Patentee before: ZHENJIANG JINHAICHUANG TECHNOLOGY CO., LTD. |
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| CP01 | Change in the name or title of a patent holder |