CN108917654A - Novel angle sensor and its measurement method - Google Patents
Novel angle sensor and its measurement method Download PDFInfo
- Publication number
- CN108917654A CN108917654A CN201810688632.XA CN201810688632A CN108917654A CN 108917654 A CN108917654 A CN 108917654A CN 201810688632 A CN201810688632 A CN 201810688632A CN 108917654 A CN108917654 A CN 108917654A
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- photodetector
- light beam
- transmitting member
- loophole
- testee
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- 238000000691 measurement method Methods 0.000 title claims abstract description 7
- 238000005259 measurement Methods 0.000 claims abstract description 19
- 238000000034 method Methods 0.000 claims abstract description 13
- 230000005622 photoelectricity Effects 0.000 claims description 4
- 239000011358 absorbing material Substances 0.000 claims description 3
- 238000001514 detection method Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 238000009826 distribution Methods 0.000 description 2
- 238000013341 scale-up Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000009738 saturating Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/26—Measuring arrangements characterised by the use of optical techniques for measuring angles or tapers; for testing the alignment of axes
Abstract
The present invention provides a kind of novel angle sensor and its measurement methods, the novel angle sensor includes transmitting member, the transmitting member with testee for being connected, the transmitting member is rotatable and circumferentially arranged with 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, the light beam of light source transmitting is transmitted away by the loophole；Photodetector one, for from the measurement process that loophole is transmitted through the same photodetector, receiving the light beam projected from loophole, and show its incoming position in light beam；Processing system, for the incoming position changing value according to light beam received on the photodetector one, 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 present invention relates to Precision Inspection field, in particular to a kind of novel angle sensor and its measurement method.
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 structure
It is complicated.
Summary of the invention
The purpose of the present invention is to provide a kind of novel angle sensor and its measurement methods, can be further improved measurement
Precision and calculating speed.
To achieve the goals above, the present invention provides following technical scheme：
A kind of novel angle sensor, including：
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, for from the measurement process that loophole is transmitted through the same photodetector, being connect in light beam
The light beam projected from loophole is received, and shows its incoming position；
Processing system, for the incoming position changing value according to light beam received on the photodetector one, place
Reason obtains the rotation angle value of testee.
It further include photodetector two in further preferred scheme, it is same for being transmitted through in light beam from loophole
In the measurement process of a photodetector, the light beam projected from loophole is received, and show its incoming position, and in measurement process
In, at least one in photodetector one and photodetector two can receive light beam；
The processing system, specifically for being connect according on the photodetector one and/or the photodetector two
The incoming position changing value of the light beam received, processing obtain the rotation angle value of testee.
In above scheme, by the way that two photodetectors are arranged, when one of photodetector does not receive light beam
The reception of another photodetector is switched to, therefore can reliably ensure continuous angle measurement, enhances novel angle sensor
Practicability.
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.
On the other hand, invention also provides a kind of measurement method of above-mentioned novel angle transducer, include the following steps：
Transmitting member is connected with testee, so that transmitting member can be rotated with the rotation of testee；
The positional relationship for adjusting light beam, reflection component, photodetector one, photodetector two, so that photodetector
At least one of one and photodetector two can receive the light beam transmitted from one of loophole；
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.
Compared with prior art, the invention has the advantages that：
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 be transmitted away from loophole, be received by a photoelectric detector, compared to the mode of reflection, simplify and calculated
Journey improves arithmetic speed, while also simplifying the structure of whole device.
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
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly introduced, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not construed as to model
The restriction enclosed for those of ordinary skill in the art without creative efforts, can also be according to these
Attached drawing obtains other relevant 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 the positional diagram of light source and photodetector.
Figure label explanation：
1- light source, 2- light beam, 5- transmitting member, 6- loophole, 7- photodetector one, 8- photodetector two, in 9-
Empty portion, transmissive portions 51, positioning region 52.
Specific embodiment
Below in conjunction with attached drawing in the embodiment of the present invention, technical solution in the embodiment of the present invention carries out clear and complete
Description.It should be appreciated that specific embodiment described herein is used only for explaining the present invention, it is not intended to limit the present invention.Base
In the embodiment of the present invention, those skilled in the art's every other implementation obtained under the premise of no creative work
Example, belongs to protection scope of the present invention.
As shown in Fig. 2, present embodiments providing a kind of novel angle sensor, including light source 1, transmitting member 5, photoelectricity are visited
Survey device 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, transmitting member 5 is equipped with hollow portion 9 circumferentially arranged with several loopholes 6, transmitting member 5, and light source 1 is located at the hollow portion
9, and it is located at the center of transmitting member 5, and position immobilizes, the light beam 2 that light source 1 emits is transmitted away by loophole 6.
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 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
Calculate rotation angle.For ease of description, light source 1 (point) is defined to be projected as projecting to photodetector (straight line)
Point, straight line is range line where the distance between light source 1 and photodetector, specifically, then havingS=s1 ± s2, wherein L be light source 1 and photodetector it
Between distance, s is photodetector (one or two) change in displacement value for measuring, s1 between incidence point one and subpoint away from
From s2 is the distance between incidence point two and subpoint, and α is the angle between light beam 2 and range line before rotation, and β is rotation
The angle between light beam 2 and range line afterwards.It follows that the formula that rotation angle calculation is carried out in the present embodiment is simpler,
Therefore arithmetic speed can be improved, and the overall structure of angular transducer is also simpler, 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
Electric explorer 28 is received, and to realize continuous measurement, can be arranged respectively for photodetector 1 and photodetector 28
Two critical points, each loophole 6 of transmitting member 5 corresponding to two critical points rotate the range of angle, the respectively light
The detection maximum and detection minimum of electric explorer, after the light beam 2 that light source 1 emits is projected by loophole 6, an at least light
Electric explorer can receive, i.e., light beam 2 is located at the detection zone between two critical points in the photodetector；Processing system pair
The method that change detection calculates between photodetector 1 and photodetector 28 is, when photodetector 1, photodetection
One of them in device 28 detects transmitted light beam 2 beyond between two critical points in the photodetector when region, processing system
It automatically switches 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 photodetector 2 8) can only in synchronization
Receive the light beam 2 projected from a loophole 6.When light source is point light beam, the open area of loophole is not required, light is worked as
When the light beam of source transmitting is a wordline light beam (light beam is projected as linear type straight line receiving plane), only visited with light source 1 in photoelectricity
For the subpoint of device is surveyed as the midpoint of photodetector, it is assumed that the length of photodetector is H, light source 1 is sent out
The angle for a wordline laser penetrated is θ, and the distance between light source 1 and photodetector are L, then the angle of distribution model of loophole 6
Following condition need to be met by enclosing β：
Wherein
When being measured using above-mentioned novel angle sensor, operate according to the following steps：
Transmitting member is connected with testee, so that transmitting member can be rotated with the rotation of testee；
The positional relationship for adjusting light beam, reflection component, photodetector one, photodetector two, so that photodetector
At least one of one and photodetector two can receive the light beam transmitted from one of loophole；
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.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art can easily think of the change or the replacement in the technical scope disclosed by the present invention, all should
It is included within the scope of protection of the present invention.
Claims (10)
1. a kind of novel angle sensor, which is characterized in that including：
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 of light source transmitting is transmitted away by the loophole；
Photodetector one, in light beam from the measurement process that loophole is transmitted through the same photodetector, receive from
The light beam that loophole projects, and show its incoming position；
Processing system is handled for the incoming position changing value according to light beam received on the photodetector one
To the rotation angle value of testee.
2. novel angle sensor according to claim 1, which is characterized in that further include photodetector two, be used for
Light beam receives the light beam projected from loophole from the measurement process that loophole is transmitted through the same photodetector, and shows
Its incoming position, and in measurement process, at least one in photodetector one and photodetector two can receive light
Beam；
The processing system is specifically used for according to received on the photodetector one and/or the photodetector two
Light beam incoming position changing value, processing obtain the rotation angle value of testee.
3. novel angle sensor according to claim 1, which is characterized in that the transmitting member includes integrally formed
Transmissive portions and positioning region, the hollow portion are set to the transmissive portions, the transmissive portions are circumferentially arranged have it is described several thoroughly
Unthreaded hole, the testee are fixed on the positioning region.
4. novel angle sensor according to claim 3, which is characterized in that the positioning region be regular polygon column or
Cylinder.
5. novel angle sensor according to claim 3, which is characterized in that the hollow portion is by the axial direction along transmissive portions
The cylindrical hole of setting is formed.
6. novel angle sensor according to claim 5, which is characterized in that the transmissive portions and positioning region are positive more
Side shape column or cylinder.
7. novel angle sensor according to claim 6, which is characterized in that the transmissive portions and positioning region are shape phase
Same regular polygon column or cylinder.
8. novel angle sensor according to claim 3, which is characterized in that transmitting member, which is equipped with, is convenient for same testee
The mounting hole being connected, the mounting hole are located at the positioning region.
9. novel angle sensor according to claim 1, which is characterized in that the non-transparent hole of the transmitting member inner wall
Region is provided with light-absorbing material layer.
10. according to the measurement method of any novel angle sensor of claim 2-9, which is characterized in that including following
Step：
Transmitting member is connected with testee, so that transmitting member can be rotated with the rotation of testee；
The positional relationship for adjusting light beam, reflection component, photodetector one, photodetector two, so that one He of photodetector
At least one of photodetector two can receive the light beam transmitted from one of loophole；
Emit light beam, loophole of the light beam by the one or more of the reflection component transmits away, and the photoelectricity is visited
Device one and/or photodetector two are surveyed, detects 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 wherein one
The variation for light beam incoming position on respective detector that a loophole projects stops until testee rotates；
Processing system passes through one incoming position changing value of laser beam and/or the light received on the photodetector one
Received two incoming position changing value of laser beam on electric explorer two, processing obtain the rotation angle value of testee.
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|---|---|---|---|
| CN201810688632.XA CN108917654A (en) | 2018-06-28 | 2018-06-28 | Novel angle sensor and its measurement method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810688632.XA CN108917654A (en) | 2018-06-28 | 2018-06-28 | Novel angle sensor and its measurement method |
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Family
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109931887A (en) * | 2019-04-09 | 2019-06-25 | 北方民族大学 | A kind of angular transducer |
| CN111256623A (en) * | 2020-03-17 | 2020-06-09 | 北方民族大学 | Pyramid type continuous angle measuring sensor and measuring method thereof |
| CN113983939A (en) * | 2021-10-19 | 2022-01-28 | 浙江吉尚汽车部件有限公司 | Device and method for measuring through hole distance on inner hole wall of brake pump cylinder body |
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