CN208282795U - Angular transducer based on bitoric lens - Google Patents
Angular transducer based on bitoric lens Download PDFInfo
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- CN208282795U CN208282795U CN201821012105.9U CN201821012105U CN208282795U CN 208282795 U CN208282795 U CN 208282795U CN 201821012105 U CN201821012105 U CN 201821012105U CN 208282795 U CN208282795 U CN 208282795U
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- Prior art keywords
- photodetector
- bitoric lens
- lens
- light beam
- transmitting member
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Abstract
The utility model provides a kind of angular transducer based on bitoric lens, including photodetector one and photodetector two, bitoric lens one and bitoric lens two, the bitoric lens one is set between the photodetector one and the transmitting member, in light beam from the measurement process that loophole is transmitted through the same photodetector, the light beam projected from loophole is incident to bitoric lens one, is incident to photodetector one after the transmission of bitoric lens one；Processing system, according to the incoming position changing value of light beam received on the photodetector one and/or the photodetector two, processing obtains the rotation angle value of testee.Continuous angle measurement not only may be implemented in the utility model angular transducer, but also precision is high, calculating speed is fast.
Description
Technical field
The utility model relates to Precision Inspection field, in particular to a kind of angle sensor based on bitoric lens
Device.
Background technique
Angular transducer is a kind of common geometry quantity sensor, in aerospace, industrial production, machine-building and army
Thing science etc. has extensive use in many fields.As shown in Figure 1, Patent No. 201510276409.0, entitled " a kind of
The Chinese patent of continuous increment type light arm scale-up version high-precision angle sensor " discloses a kind of angular transducer, the sensor
Structure is simple, and suitable for the measure of the change of the continuous increment of testee angle, measurement is reliable, it is easy to accomplish batch micro operations.According to
The continuous angle fundamental measurement principle of light arm amplifying type is it is found that the calculating process of the angular transducer is complicated, and time-consuming, and in system
There are nonlinearity errons, cause measurement accuracy limited.
Utility model content
The purpose of this utility model is to provide a kind of angular transducers based on bitoric lens, can be further improved
Measurement accuracy and calculating speed.
To achieve the goals above, the utility model the following technical schemes are provided:
A kind of angular transducer based on bitoric lens, comprising:
Light source, for emitting light beam；
Transmitting member, for the transmitting member for being connected with testee, the transmitting member is rotatable and along week
To several loopholes are equipped with, transmitting member is equipped with hollow portion, and light source is located at the hollow portion, and is located in transmitting member
The heart, and position immobilizes, the light beam of light source transmitting is transmitted away by the loophole；
Photodetector one and photodetector two, bitoric lens one and bitoric lens two,
The bitoric lens one is set between the photodetector one and the transmitting member, in light beam from light transmission
Hole is transmitted through in the measurement process of the same photodetector, and the light beam projected from loophole is incident to bitoric lens one, is passed through
Bitoric lens one is incident to photodetector one after transmiting；
The bitoric lens two is set between the photodetector two and the transmitting member, in light beam from light transmission
Hole is transmitted through in the measurement process of the same photodetector, and the light beam projected from loophole is incident to bitoric lens two, is passed through
Bitoric lens two is incident to photodetector two after transmiting；
Photodetector one and photodetector two receive respectively to be transmitted from bitoric lens one and bitoric lens two
Light beam, and show its incoming position, and in measurement process, at least one in photodetector one and photodetector two
Light beam can be received；
In above scheme, by the way that bitoric lens is arranged between photodetector and transmitting member, it may be implemented to transmit
Component rotational angle and facula position are linear, eliminate nonlinearity erron, and then improve the measurement accuracy of angular transducer.
In the scheme advanced optimized, the transmitting member includes integrally formed transmissive portions and positioning region, the transmission
Portion is circumferentially arranged several described loopholes, and the testee is fixed on the positioning region.By the way that transmitting member is set
Be set to the integrally formed component of transmissive portions and positioning region, when assembly can operate (such as clamping) positioning region realize transmitting member with
Positioning between the components such as photodetector, light source, testee and light source are located at the different location of transmitting member, can also
Avoid influencing each other between testee and light source.
In the scheme advanced optimized, the positioning region is regular polygon column or cylinder.Regular polygon pillar construction
Itself has stronger locating effect, can be better achieved between the components such as emission element and photodetector, light source and determine
Position.
In the scheme advanced optimized, the hollow portion is formed by the cylindrical hole being axially arranged along transmissive portions.
So set, may make loophole along cylindrical hole wall distribution, realizes and preferably carry out angle measurement.
In the scheme advanced optimized, the transmissive portions and positioning region are the identical regular polygon column of shape or circle
Column.So set, easy to produce, i.e., transmitting member is an overall structure, it is only necessary to column is divided into two parts along axial direction,
Loophole is arranged in each side of its middle and upper part point, that is, forms transmissive portions.
In the scheme advanced optimized, the mounting hole that transmitting member is equipped with convenient for being connected with testee, the peace
Dress hole is located at the positioning region.
In the scheme advanced optimized, the non-transparent bore region of the transmitting member inner wall is provided with light-absorbing material layer.
By the way that light-absorbing material layer is arranged, the light beam not transmitted away can be absorbed, light beam is avoided to be reflected back light source.
Compared with prior art, the utility model has the following beneficial effects:
By the way that light source to be set to the center of transmitting member, several loopholes, light source transmitting are set on transmitting member
Light beam can directly transmit away, be received by a photoelectric detector, compared to the mode of reflection, simplify calculating process, improve
Arithmetic speed, while also simplifying the structure of whole device.
By the setting of bitoric lens one and bitoric lens two, transmitting member rotational angle and hot spot position may be implemented
It is set to linear relationship, eliminates nonlinearity erron, and then improve the measurement accuracy of angular transducer.
By the way that testee to be mounted on transmitting member, transmitting member rotates together therewith when testee rotates, and leads to
Different loopholes transmit light beam and are located at photodetector one, photodetection on the transmitting member crossed in measurement rotary course
The variation of incoming position point on device two, processing system can according to the variation of beam landing position on two photodetectors come
The changing value of testee rotation angle is calculated, the sensor structure is simple, the change suitable for the continuous increment of testee angle
Change measurement, measurement is reliable, it is easy to accomplish batch micro operations.
Two critical points are respectively provided on photodetector one and photodetector two as the rotation for detecting corresponding loophole
Angle, the cooperation of two photodetectors, can satisfy be able to detect always the transmitting member loophole transmission it is wherein a branch of
Light beam is to the position of corresponding photodetector；It is such as more than two on photodetector one after light beam is projected from a loophole
When critical points detection range, light beam then projects the two critical points detection models entered on photodetector two from another loophole
It encloses, processing system can switch its testing result to calculate the rotation angle of testee, the simpler convenience of operation.
Detailed description of the invention
It, below will be to use required in embodiment in order to illustrate more clearly of the technical solution of the utility model embodiment
Attached drawing briefly introduce, it should be understood that the following drawings illustrates only some embodiments of the utility model, therefore should not be seen
Work is the restriction to range, for those of ordinary skill in the art, without creative efforts, can be with
Other relevant drawings are obtained according to these attached drawings.
Fig. 1 is the rotation angle that continuous increment type light arm scale-up version angular transducer in the prior art measures testee
Schematic diagram.
Fig. 2 is the schematic diagram of the angular transducer provided in embodiment.
Fig. 3 is the structural schematic diagram of transmitting member.
Fig. 4 is light path schematic diagram of the light beam of same light source transmitting after bitoric lens different location.
Fig. 5 is the positional diagram of light source and photodetector.
Fig. 6 is that the angle of a wordline laser and the relationship of photodetector one and the acceptance angle of photodetector two are illustrated
Figure.
Figure label explanation:
1- light source, 2- light beam 2,3- bitoric lens one, 4- bitoric lens two, 5- transmitting member, 6- loophole, 7- light
Electric explorer one, 8- photodetector two, 9- hollow portion, transmissive portions 51, positioning region 52.
Specific embodiment
Below in conjunction with attached drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out clear
Chu completely describes.It should be appreciated that specific embodiment described herein is used only for explaining the utility model, it is not used to limit
Determine the utility model.Based on the embodiments of the present invention, those skilled in the art are in no creative work under the premise of institute
The every other embodiment obtained, belongs to the protection scope of the utility model.
As shown in Fig. 2, present embodiments providing a kind of angular transducer based on bitoric lens, including light source 1, hyperbolic
Face lens 1, bitoric lens 24, transmitting member 5, photodetector 1, photodetector 28 and processing system.
Wherein, for transmitting member 5 for being connected with testee, transmitting member 5 is rotatable, then testee is followed to revolve
Turn, for transmitting member 5 circumferentially arranged with several loopholes 6, transmitting member 5 is equipped with hollow portion 9, light source 1 can for point light source or
Linear light source is located at the hollow portion 9, and is located at the center of transmitting member 5, and position immobilizes, the light beam 2 that light source 1 emits
It is transmitted away by loophole 6.
Wherein, bitoric lens 1 is provided between photodetector 1 and transmitting member 5, so that in light beam 2 from saturating
Unthreaded hole 6 is transmitted through in the measurement process of the same photodetector, and the light beam 2 projected from loophole 6 is incident to bitoric lens
One 3, photodetector 1 is incident to after the transmission of bitoric lens 1；It is set between photodetector 28 and transmitting member 55
It is equipped with bitoric lens 24, so that in light beam 2 from the measurement process that loophole 6 is transmitted through the same photodetector, from saturating
The light beam 2 that unthreaded hole 6 projects is incident to bitoric lens 24, is incident to photodetector 28 after the transmission of bitoric lens 24.
Wherein, photodetector 1 and photodetector 28, for being incident upon the same photoelectricity from loophole 6 in light beam 2
In the measurement process of detector, the light beam 2 projected from different loopholes 6 is received respectively, and show its incoming position, and measuring
In the process, at least one in photodetector 1 and photodetector 28 can receive light beam 2, to realize continuous survey
Amount.
The incident position of light beam 2 of the processing system received by photodetector 1 and/or photodetector 28
Changing value is set, processing obtains the rotation angle value of testee.Processing system can be any mould with mathematical computational abilities
Block or chip or device, such as single-chip microcontroller or FPGA or computer etc..
As shown in figure 4, only citing as an embodiment, the center thickness of bitoric lens is 4cm, and focal length is
7cm, material PMMA, refractive index are 1.495@532nm, in the front surface of light starting point (i.e. light source 1) and bitoric lens
Heart distance is 5cm, bitoric lens can the light at right ± 30 ° of angles convert.Bitoric lens has refraction effect, and incident
It is different to the refraction angle of the light of the different location of bitoric lens, by the setting of bitoric lens, photoelectricity spy may be implemented
It is linear between the survey obtained incoming position variable quantity of device measurement and the rotation angle of transmitting member 5 (i.e. testee),
Then nonlinearity erron existing for angular transducer in embodiment 1 is eliminated, can be further improved measurement accuracy.
As shown in figure 3, transmitting member 5 includes integrally formed transmissive portions 51 and positioning region 52, transmissive portions in the present embodiment
51 and positioning region 52 be regular polygon column.For the ease of production, as shown in figure 3, the shape of positioning region 52 and transmissive portions 51
Shape it is identical.Hollow portion 9 is set to transmissive portions 51, is formed by the cylindrical hole being axially arranged along transmissive portions 51, several
A loophole 6 is saturating with the light beam 2 for allowing light source 1 to emit through the entire wall thickness of transmissive portions 51 along the circumferentially distributed of transmissive portions 51
It crosses, is incident to photodetector.Positioning region 52 is provided with mounting hole, and testee connects positioning region 52 by the mounting hole.Thoroughly
Penetrating portion 51 and/or positioning region 52 can also be for the ease of folder using cylinder or other structures, the purpose using polygon column
Positioning region 52 is held, in order to install positioning.
As shown in Fig. 2, solid line indicates that the light beam 2 before rotation, dotted line indicate rotationLight beam 2 after angle, light beam 2 from
Loophole 6 is transmitted through in the measurement process of the same photodetector, incidence of the light beam 2 on photodetector before definition rotates
Point is incidence point one, and incidence point of the light beam 2 on photodetector is incidence point two after rotation, by photodetector 1 or
The incoming position changing value (i.e. the distance between incidence point one and incidence point two) measured on photodetector 28, Ji Keji
Calculate rotation angle.For ease of description, the subpoint that is projected as of light source 1 (point) to photodetector (straight line), light source 1 are defined
Straight line is range line where the distance between photodetector, specifically, then having
S=s1 ± s2, wherein L is the distance between light source 1 and photodetector, and s is that photodetector (one or two) measure
Change in displacement value, s1 be the distance between incidence point one and subpoint, s2 be the distance between incidence point two and subpoint, α
For the angle between the light beam 2 and range line before rotation, angle of the β between postrotational light beam 2 and range line.Thus may be used
To know, the formula that rotation angle calculation is carried out in the present embodiment is simpler, therefore arithmetic speed can be improved, and angular transducer
Overall structure is also simpler, and cost is lower.
In order to ensure light source 1 emit light beam 2 by loophole 6 transmission after, can be by photodetector 1 and/or light
Source 1 two is received, and to realize continuous measurement, can be arranged two for photodetector 1 and photodetector 28 respectively and be faced
Boundary's point, each loophole 6 of transmitting member 5 corresponding to two critical points rotate the range of angle, the respectively photodetection
The detection maximum and detection minimum of device, after the light beam 2 that light source 1 emits is projected by loophole 6, an at least photodetection
Device can receive, i.e., light beam 2 is located at the detection zone between two critical points in the photodetector；Processing system visits photoelectricity
Surveying the method that change detection calculates between device 1 and photodetector 28 is, when photodetector 1, photodetector 28
In one of them detect transmitted light beam 2 beyond when region, processing system is automatic between two critical points in the photodetector
It is switched to and is calculated using 2 detected value of light beam in another photodetector detection zone.
Readily comprehensible, in order to avoid interference, photodetector 1 (or two) can only be received from one thoroughly in synchronization
The light beam 2 that unthreaded hole 6 projects.Only by light source 1 photodetector subpoint for the midpoint of photodetector for, such as Fig. 5 institute
Show, it is assumed that the length of photodetector is H, and the angle for a wordline laser that light source 1 emits is θ, light source 1 and photodetector it
Between distance be L, then the distribution angular range β of loophole 6 need to meet following condition:
In order to ensure between photodetector 1 and photodetector 28, always there is a photodetector that can receive
Light beam 2, as shown in fig. 6, as an implementation, the position of photodetector 1 and photodetector 28 can be arranged
To meet following relationship: the angle for a wordline laser that light source 1 emits is greater than photodetector 1 and photodetector 28
Acceptance angle δ.When the rotation angle very little of testee, the light beam 2 for rotating front and back may be incident upon photoelectricity from the same loophole 6
Detector, when rotation angle is larger, then the light beam 2 for rotating front and back is incident upon the same photodetector from different loopholes 6.
Angular transducer described in the present embodiment, is not only simple in structure, and arithmetic speed is fast, but also photoelectricity spy may be implemented
The rotational angle of the incoming position variable quantity and testee of surveying device is linear, and then improves measurement accuracy.
When being measured using the above-mentioned angular transducer based on bitoric lens, carried out according to following operation:
Transmitting member is connected with testee, so that transmitting member can be rotated with the rotation of testee；
Adjust light beam, reflection component, photodetector one, photodetector two, bitoric lens one and bitoric lens
Two positional relationship transmits so that being incident to bitoric lens one from the light beam that a loophole projects through bitoric lens one
After be incident to photodetector one, and/or, from a loophole project light beam be incident to bitoric lens two, through hyperboloid
Lens two are incident to photodetector two after transmiting；
Emit light beam, loophole of the light beam by the one or more of the reflection component transmits away, the light
Electric explorer one and/or photodetector two detect the initial position of the light beam projected from one of loophole；
Testee rotation, in rotary course, the photodetector one and/or photodetector two are detected from it
In a loophole project light beam incoming position on respective detector variation, until testee rotate stop；
Processing system passes through one incoming position changing value of laser beam received on the photodetector one and/or institute
Two incoming position changing value of laser beam received on photodetector two is stated, processing obtains the rotation angle of testee
Value.
Above description is only a specific implementation of the present invention, but the protection scope of the utility model is not limited to
In this, anyone skilled in the art can readily occur in variation within the technical scope disclosed by the utility model
Or replacement, should all it cover within the protection scope of the present utility model.
Claims (10)
1. a kind of angular transducer based on bitoric lens characterized by comprising
Light source, for emitting light beam；
Transmitting member, for the transmitting member for being connected with testee, the transmitting member is rotatable and circumferentially sets
There are several loopholes, transmitting member is equipped with hollow portion, and light source is located at the hollow portion, and is located at the center of transmitting member, and
Position immobilizes, and the light beam 2 of light source transmitting is transmitted away by the loophole；
Photodetector one and photodetector two, bitoric lens one and bitoric lens two,
The bitoric lens one is set between the photodetector one and the transmitting member, saturating from loophole in light beam
It is incident upon in the measurement process of the same photodetector, the light beam projected from loophole is incident to bitoric lens one, through hyperbolic
Face lens one are incident to photodetector one after transmiting；
The bitoric lens two is set between the photodetector two and the transmitting member, saturating from loophole in light beam
It is incident upon in the measurement process of the same photodetector, the light beam projected from loophole is incident to bitoric lens two, through hyperbolic
Face lens two are incident to photodetector two after transmiting；
Photodetector one and photodetector two receive the light transmitted from bitoric lens one and bitoric lens two respectively
Beam, and show its incoming position, and in measurement process, at least one in photodetector one and photodetector two can
Receive light beam；
Processing system, according to the incidence of light beam received on the photodetector one and/or the photodetector two
Change in location value, processing obtain the rotation angle value of testee.
2. the angular transducer according to claim 1 based on bitoric lens, which is characterized in that the transmitting member packet
Integrally formed transmissive portions and positioning region are included, the hollow portion is set to the transmissive portions, and the transmissive portions are circumferentially arranged to be had
Several described loopholes, the testee are fixed on the positioning region.
3. the angular transducer according to claim 2 based on bitoric lens, which is characterized in that the positioning region is positive
Polygon column or cylinder.
4. the angular transducer according to claim 2 based on bitoric lens, which is characterized in that the hollow portion is by edge
The cylindrical hole of transmissive portions being axially arranged is formed.
5. the angular transducer according to claim 4 based on bitoric lens, which is characterized in that transmissive portions and fixed
Position portion is regular polygon column or cylinder.
6. the angular transducer according to claim 5 based on bitoric lens, which is characterized in that transmissive portions and fixed
Position portion is the identical regular polygon column of shape or cylinder.
7. the angular transducer according to claim 2 based on bitoric lens, which is characterized in that transmitting member is equipped with just
In the mounting hole that same testee is connected, the mounting hole is located at the positioning region.
8. the angular transducer according to claim 1 based on bitoric lens, which is characterized in that light source transmitting light be
A wordline laser.
9. the angular transducer according to claim 8 based on bitoric lens, which is characterized in that a word of light source transmitting
The angle of line laser is greater than the acceptance angle of photodetector one and photodetector two.
10. the angular transducer according to claim 9 based on bitoric lens, which is characterized in that the transmitting member
The non-transparent bore region of inner wall is provided with light-absorbing material layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821012105.9U CN208282795U (en) | 2018-06-28 | 2018-06-28 | Angular transducer based on bitoric lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821012105.9U CN208282795U (en) | 2018-06-28 | 2018-06-28 | Angular transducer based on bitoric lens |
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| Publication Number | Publication Date |
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| CN208282795U true CN208282795U (en) | 2018-12-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821012105.9U Expired - Fee Related CN208282795U (en) | 2018-06-28 | 2018-06-28 | Angular transducer based on bitoric lens |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108458672A (en) * | 2018-06-28 | 2018-08-28 | 北方民族大学 | Angular transducer based on bitoric lens and its measurement method |
-
2018
- 2018-06-28 CN CN201821012105.9U patent/CN208282795U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108458672A (en) * | 2018-06-28 | 2018-08-28 | 北方民族大学 | Angular transducer based on bitoric lens and its measurement method |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
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Granted publication date: 20181225 Termination date: 20210628 |