CN201476771U - Device for measuring angle position of rotating element - Google Patents
Device for measuring angle position of rotating element Download PDFInfo
- Publication number
- CN201476771U CN201476771U CN2009201676783U CN200920167678U CN201476771U CN 201476771 U CN201476771 U CN 201476771U CN 2009201676783 U CN2009201676783 U CN 2009201676783U CN 200920167678 U CN200920167678 U CN 200920167678U CN 201476771 U CN201476771 U CN 201476771U
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- diffuse reflection
- angle
- light source
- photodetector
- rotating element
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Abstract
The utility model relates to a device for measuring the angle position of a rotating element, which comprises a light source, optical detectors, the rotating element and a diffuse reflection element synchronously swinging along with the rotating element, wherein the position relation among the light source, the optical detectors and the diffuse reflection element achieves the purpose that when the rotating element swings within the scope of an swinging angle, light beams diffusively reflected by the diffuse reflection element can reach the optical detectors distributed on two sides of the light source, and the areas of the light beams diffusively reflected by the diffuse reflection element to the optical detectors vary from the swinging angle. Light emitted by the light source is directly reflected to the diffuse reflection element and then reflected to the optical detectors through the diffuse reflection element; and the optical detectors are used for photoelectric conversion according to the areas of the light beams and finally outputting the angle position signal of the rotating element. The utility model can accurately measure the angle position of the rotating element by utilizing the diffuse reflection principle, thereby not only solving the problem of bad angle position linearity in the prior position detector, but also solving the problems of large volume and large manufacturing difficulty in the prior position detector.
Description
Technical field
The utility model relates to a kind of device of measuring angle and position of rotating element, particularly measures the device of galvanometer scanner (professional term of Chinese is " galvanometer ", a kind of element that is used for laser beam flying) rotating shaft angle position.
Background technology
In the prior art, the angle position of surveying rotating element in the limited anglec of rotation mainly contains two types sensor, and a class is the capacitive position detector, though capacitive position transducer detection accuracy height, the linearity is good, and its volume is big, manufacture difficulty is big, the ability of anti-electromagnetic interference (EMI).Another kind of is photoelectric position sensor, present photoelectric position sensor all is to shine directly into (are commonly called as and are direct-injection type) such as photodetector such as silicon photocells with the light beam that light-emitting component such as infrared transmitting tube send, block device by the light that is fixed on the special shape in the rotating shaft and block a part of rayed on photodetector, when rotating shaft during in different angles, be distributed in different positions photodetector since light block device block the light-receiving area difference, photodetector is according to different light-receiving areas, produce different linearity output respectively, calculate the angle position of rotating shaft according to these linear outputs.There is following defective in the photoelectrical position sensor of this direct irradiation formula: any infrared transmitting tube all has certain lighting angle scope, and along with the increase of angle and the increase light intensity of projection distance descend, thereby be difficult to accomplish even wide-angle light field, the light intensity difference that receives at different locational photodetectors like this, the output of photodetector is linear to descend, thereby makes the linearity variation of rotating shaft angle position.
Chinese patent publication number: CN1297526A, open day: May 30 calendar year 2001.But this patent disclosure a kind of axial LED detecting device of determining the pivoted member angle position, photoelectric position sensor is the direct-injection type photoelectrical position sensor in the literary composition, a light source is arranged above four array arrangement photodetectors, the shield element that a butterfly is arranged between light source and the photodetector, this shield element is fixed on an end of rotating shaft, when the shield element of butterfly is rotated along with rotating shaft or is swung, make the sensitive surface of two photodetectors strengthen, two sensitive surfaces reduce in addition, the cross connection of photodetector diagonal angle, therefore the summation of a pair of photodetector output increases and another summation output to photodetector reduces, and these two pairs of output signals is calculated can be drawn the angle that rotating shaft is rotated.The shortcoming that this patent exists is: any light source all has certain lighting angle scope, and along with the increase of angle and the increase light intensity of projection distance descend, thereby be difficult to accomplish even wide-angle light field, the light intensity difference that receives at different locational photodetectors like this, the output of photodetector is linear to descend, thereby makes the linearity variation of rotating shaft angle position.
The utility model content
The technical problems to be solved in the utility model is: overcome the deficiencies in the prior art, a kind of device (photoelectric position detector) of measuring angle and position of rotating element is provided, the casual emission principle of the utility model utilization can accurately be measured the angle position of rotating element, solve the problem of angle position poor linearity in the existing position detector, also solved the problem that existing position detector volume is big, manufacture difficulty is big.
The technical solution adopted in the utility model is:
The device of the mensuration angle and position of rotating element that the utility model the provides photoelectric position detector, of angle and position of rotating element (that is: be used to measure) comprises
Rotating element;
Light source: be used to launch light beam;
Diffuse reflection element with the synchronous swing of rotating element: be used to receive the light beam of light emitted, and photodetector is arrived in a light beam diffuse reflection that receives;
Photodetector: be used to receive the light beam that the diffuse reflection of diffuse reflection element goes out, and carry out opto-electronic conversion, light signal is converted to electric signal according to the area size of light beam; And
Output unit: the electric signal that photodetector is sent here is handled the angle position signal of output rotating element;
Position relation between light source, photodetector and the diffuse reflection element satisfies: when rotating element is swung in the pendulum angle scope, the light beam that the diffuse reflection of diffuse reflection element goes out can arrive on the photodetector that is distributed in the light source both sides, and the diffuse reflection of diffuse reflection element is different along with the difference of pendulum angle to the beam area of photodetector.
Described diffuse reflection element is by carrying out the element that irreflexive material is made to the light that light source sent, or on the reflecting surface of this element, coat and to overflow the material of emission to the light that light source sent, or on the reflecting surface of this element, plate and to overflow the material of launching to the light that light source sent.
Distance between light source, diffuse reflection element and the photodetector three is near more good more under the isogonal condition of assurance.
Further, described photoelectric psd also comprises support, and described support is used for fixing described light source and described photodetector.
Described diffuse reflection element is connected with described rotating element by rotating shaft.
The plane at described photodetector place and the angle of described light source axis are the arbitrary value in 5 °～200 °, and preferable range is 30 °～60 °, and optimally, this angle is 45 °.
Further, described photodetector is a silicon photocell, and described diffuse reflection element is the element of being made by pottery.
Principle of work of the present utility model is: key of the present utility model is the relation between diffuse reflection element and light source and the photodetector, must guarantee that the rotating shaft light beam that the diffuse reflection of (± 40 ° pendulum angle scope, the angle position at diffuse reflection element place is the benchmark zero degree during with the photodetector output signal equal and opposite in direction) when swing diffuse reflection element goes out in the pendulum angle of design can arrive on the photodetector that is distributed in the light source both sides simultaneously.When diffuse reflection element during with shaft swing, the reflected light area that a photodetector is received is big, and the reflected light area that another photodetector is received is smaller, the output signal of such photodetector increases, the output signal of another photodetector reduces, these outputs are connected to the opposite end of differential amplifier subsequently, finally generate two-way linearity output.When the utility model device is worked, photodetector generation one is proportional to the electric current of integrated radiant emittance, this radiation energy is meant the luminous energy of diffuse reflection element diffuse reflection to the photodetector, the output of photodetector is proportional to its area that diffuses that receives, pendulum angle difference with the diffuse reflection element, the light-receiving area of photodetector is also different, and the final output of photodetector can be represented the pendulum angle of rotating shaft.
Compared with the prior art the utility model has following good effect:
(1) the utility model adopts casual emission principle, the position relation of adjusting between light source, photodetector and the diffuse reflection element three satisfies: make rotating element in the pendulum angle of design during (± 40 ° pendulum angle scopes) swing, the light beam that the diffuse reflection of diffuse reflection element goes out can arrive the photodetector that is distributed in the light source both sides simultaneously, and the diffuse reflection of diffuse reflection element is different along with the difference of pendulum angle to the beam area of photodetector.The light beam that light source sends light field of light beam after diffuse reflection becomes evenly, thereby has overcome the shortcoming of angle position poor linearity in the existing photoelectric psd.
(2) the utility model is owing to adopt casual emission principle, the radial and axial motion of the light countershaft after diffuse reflection is insensitive, so radial and axial the beating of rotating shaft do not produce the equivalent output signal corresponding to the rotating shaft rotation, such first requirement that has reduced assembly precision, second has strengthened the radial and axial antijamming capability of beating, and has improved the stability of position output signal.
(3) device of the present utility model mainly is made up of light source, diffuse reflection element and photodetector, and is simple in structure, and low cost of manufacture has overcome that existing position detector element number is many, assembling is complicated causes the problem that volume is big, manufacture difficulty is big.
(4) distance between light source, diffuse reflection element and this three of photodetector is near more good more under the isogonal condition of assurance in the utility model, because the loss of dipped beam is more little more, so the light that photodetector receives is strong more.
Description of drawings
Fig. 1 is provided with the structure cut-open view of the scanner of mensuration angle and position of rotating element sensor along rotor shaft direction for the utility model embodiment one;
Fig. 2 be Fig. 1 along A-A to sectional view;
Fig. 3 is the support front elevation of the utility model embodiment one;
Fig. 4 is the support rear view of the utility model embodiment one;
Fig. 5 is the casual radiated element stereographic map of the utility model embodiment one and embodiment two;
Fig. 6 is provided with the structure cut-open view of the scanner of mensuration angle and position of rotating element sensor along rotor shaft direction for the utility model embodiment two;
Fig. 7 be Fig. 6 along B-B to sectional view;
Fig. 8 is the support front elevation of the utility model embodiment two;
Fig. 9 is the support rear view of the utility model embodiment two.
Figure number explanation: 1-photodetector; The 2-support; 3-diffuse reflection element; The 4-light source; The 5-rotating shaft; The 6-bearing; The 7-housing; The 8-rotating element; 9-photoelectrical position sensor (claiming photoelectric position detector, again); The 10-sensor circuit board; The 11-angle limiter.
Embodiment
The device (that is: photoelectric position detector, or photoelectrical position sensor) of the utility model being measured angle and position of rotating element below in conjunction with accompanying drawing describes in further detail.
One: one light source of embodiment, two photodetectors.
Fig. 1 is provided with the scanner of measuring the angle and position of rotating element sensor structure cut-open view along rotor shaft direction, wherein along A-A to sectional view promptly be the sectional view of photoelectric position detector, (photoelectrical position sensor).
As shown in Figure 2, the device of mensuration angle and position of rotating element comprises rotating element 8, light source 4, diffuse reflection element 3, photodetector 1, support 2 (being made by the engineering plastics that thermal expansivity is little) and data processing unit (data processing unit is an output unit).Adopt an infrared diode as light source in this example; Photodetector adopts silicon photocell, has two; Described diffuse reflection element 3 is made by stupalith.
The syndeton of each ingredient is:
Light source 4: be used to launch light beam;
Diffuse reflection element 3: be used to receive light source 4 emitted light beams, and a light beam diffuse reflection that receives is to photodetector 1, diffuse reflection element in this example is rectangle (as shown in Figure 5), and described diffuse reflection element 3 directly is fixed on an end of rotating shaft 5, the other end of described rotating shaft 5 rotating element 8 of ining succession;
Photodetector 1: be used to receive the light beam that 3 diffuse reflections of diffuse reflection element go out, and light signal is changed into electric signal;
Data processing unit: the electric signal that photodetector 1 is sent here is handled the angle position signal of output rotating element;
Support 2 (shown in Fig. 3,4): as described in being used for fixing light source 4 and as described in photodetector 1.Light source 4 and two photodetectors 1 are embedded on the inwall of this support, two photodetectors 1 are distributed in the both sides of light source 4, the angle of the plane at photodetector place and light source axis be 45 ° (through the test, arbitrary value in 5 °～200 ° all can, but the diffuse reflection element reflects is strong to the beam intensity of photodetector when getting the arbitrary value in 30 °～60 °, and the light field good uniformity, best results in the time of 45 °); Described rotating shaft 5 is positioned at the central authorities of this support, and described diffuse reflection element 3 can rotate (can swing) in ± 40 ° pendulum angle scope in this support.
Position relation between light source 4, photodetector 1 and the diffuse reflection element 3 satisfies: when rotating element 8 is swung in the pendulum angle scope, the light beam that 3 diffuse reflections of diffuse reflection element go out can arrive the photodetector 1 that is distributed in light source 4 both sides simultaneously, and under different pendulum angles, the diffuse reflection of diffuse reflection element is to the beam area difference of photodetector.
Do not add any element between light source 4 and the diffuse reflection element 3, the distance between light source 4, photodetector 1, diffuse reflection element 3 these threes is near more good more under the isogonal condition of assurance, because the loss of dipped beam is more little more, the light that photodetector receives is strong more.
Two: two light sources of embodiment, four photodetectors.
Shown in Fig. 6,7, different with embodiment one is, the silicon photocell of present embodiment has four, and infrared diode has two.The axis of two infrared diodes point-blank, the plane at the photodetector place of each light source both sides and the angle of this light source axis be 60 ° (through the test, arbitrary value in 5 °～200 ° all can, but the diffuse reflection element reflects is strong to the beam intensity of photodetector when getting the arbitrary value in 30 °～60 °, and light field good uniformity, best results in the time of 45 ° illustrates with 60 ° among the figure).Do not add any element between light source and the diffuse reflection element, the light direct beam that light source sends to the diffuse reflection element again through the diffuse reflection element reflects to photodetector.Distance between light source, photodetector, this three of diffuse reflection element is near more good more under the isogonal condition of assurance, and the loss of dipped beam is more little more, and the light that photodetector receives is strong more.
The undocumented part of this instructions belongs to the known technology of this area.
The above; it only is preferred embodiment of the present utility model; be not that the utility model is done any pro forma restriction; every foundation technical spirit of the present utility model all still belongs to the protection domain of technical solutions of the utility model to any simple modification, equivalent variations and modification that above embodiment did.
Claims (11)
1. measure the device of angle and position of rotating element, it is characterized in that: comprise
Rotating element (8);
Light source (4): be used to launch light beam;
Diffuse reflection element (3) with the synchronous swing of rotating element (8): be used to receive light source (4) emitted light beams, and photodetector (1) is arrived in a light beam diffuse reflection that receives;
Photodetector (1): be used to receive the light beam that diffuse reflection element (3) diffuse reflection goes out, and carry out opto-electronic conversion, light signal is converted to electric signal according to the area size of light beam; And
Output unit: the electric signal that photodetector (1) is sent here is handled the angle position signal of output rotating element;
Position relation between light source (4), photodetector (1) and the diffuse reflection element (3) satisfies: when rotating element (8) is swung in the pendulum angle scope, the light beam that diffuse reflection element (3) diffuse reflection goes out can arrive on the photodetector (1) that is distributed in light source (4) both sides, and diffuse reflection element (3) diffuse reflection is different along with the difference of pendulum angle to the beam area of photodetector (1).
2. the device of mensuration angle and position of rotating element according to claim 1 is characterized in that: described photoelectric psd also comprises support (2), and described support (2) is used for fixing described light source (4) and described photodetector (1).
3. the device of mensuration angle and position of rotating element according to claim 1 is characterized in that: described diffuse reflection element (3) is connected with described rotating element (8) by rotating shaft (5).
4. according to the device of the described mensuration angle and position of rotating element of claim 1～3, it is characterized in that: the angle of the plane at described photodetector (1) place and described light source (4) axis is the arbitrary value in 5 °～200 °.
5. the device of mensuration angle and position of rotating element according to claim 4 is characterized in that: the angle of the plane at described photodetector (1) place and described light source (4) axis is the arbitrary value in 30 °～60 °.
6. the device of mensuration angle and position of rotating element according to claim 5 is characterized in that: the angle of the plane at described photodetector (1) place and described light source (4) axis is 45 °.
7. according to the device of each described mensuration angle and position of rotating element in the claim 1～3, it is characterized in that: described photodetector (1) is a silicon photocell.
8. according to the device of each described mensuration angle and position of rotating element in the claim 1～3, it is characterized in that: described diffuse reflection element is by carrying out the element that irreflexive material is made to the light that light source sent, or on the reflecting surface of this element, coat and to overflow the material of emission to the light that light source sent, or on the reflecting surface of this element, plate and to overflow the material of launching to the light that light source sent.
9. the device of mensuration angle and position of rotating element according to claim 8 is characterized in that: described diffuse reflection element (3) is the element of being made by pottery.
10. according to the device of the described mensuration angle and position of rotating element of claim 1～3, it is characterized in that: the number of described light source (4) is one, and the number of described photodetector (1) is two.
11. the device according to the described mensuration angle and position of rotating element of claim 1～3 is characterized in that: the number of described light source (4) is two, and the number of described photodetector (1) is four, and the axis of two light sources (4) point-blank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201676783U CN201476771U (en) | 2009-07-28 | 2009-07-28 | Device for measuring angle position of rotating element |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201676783U CN201476771U (en) | 2009-07-28 | 2009-07-28 | Device for measuring angle position of rotating element |
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| CN201476771U true CN201476771U (en) | 2010-05-19 |
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| CN2009201676783U Expired - Lifetime CN201476771U (en) | 2009-07-28 | 2009-07-28 | Device for measuring angle position of rotating element |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108917653A (en) * | 2018-03-20 | 2018-11-30 | 刘红阳 | Rotational angle measurement method and device |
| CN110542393A (en) * | 2018-05-28 | 2019-12-06 | 阳程科技股份有限公司 | Plate inclination angle measuring device and measuring method |
| CN111045487A (en) * | 2019-12-25 | 2020-04-21 | 维沃移动通信有限公司 | Electronic equipment and folding angle detection method |
-
2009
- 2009-07-28 CN CN2009201676783U patent/CN201476771U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108917653A (en) * | 2018-03-20 | 2018-11-30 | 刘红阳 | Rotational angle measurement method and device |
| CN110542393A (en) * | 2018-05-28 | 2019-12-06 | 阳程科技股份有限公司 | Plate inclination angle measuring device and measuring method |
| CN110542393B (en) * | 2018-05-28 | 2021-09-03 | 阳程科技股份有限公司 | Plate inclination angle measuring device and measuring method |
| CN111045487A (en) * | 2019-12-25 | 2020-04-21 | 维沃移动通信有限公司 | Electronic equipment and folding angle detection method |
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| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100519 |
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| CX01 | Expiry of patent term |