CN1862223A - Repeat angle positioning method for rotary body - Google Patents
Repeat angle positioning method for rotary body Download PDFInfo
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- CN1862223A CN1862223A CN 200510069944 CN200510069944A CN1862223A CN 1862223 A CN1862223 A CN 1862223A CN 200510069944 CN200510069944 CN 200510069944 CN 200510069944 A CN200510069944 A CN 200510069944A CN 1862223 A CN1862223 A CN 1862223A
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Abstract
The present invention relates to a repeate angle location method of gyrorotor. It has a gyrorotor, on the measuring end face of the described gyrorotor a follow-up reflector is set, the reflecting plane of said follow-up reflector is passed through the axial lead of the described gyrorotor and parallel to said axial lead, a fixed reflector is set oppositely to said described follow-up reflector, at one side outside of the described fixed reflector a measurement light source is set, at another side outside of the described fixed reflector an optical signal receiver and a signal processor are set. Said invention also provides the concrete steps for implementing repeate angle location method of gyrorotor by utilizing above-mentioned all the components.
Description
Technical field
The present invention relates to a kind of repetition angle positioning method of solid of revolution, this method is used for the location, repetition angle to the position of rotation of rotating member.
Technical background
Chinese patent 02132801.3 discloses a kind of cylindrical grating shaft interference encoder, belongs to the scrambler that is used for the measured angular displacement in the photoelectric measurement technical field.The technical problem to be solved in the present invention is: the angular displacement information that extracts high resolution on the face of cylinder.The technical scheme of technical solution problem is: cylindrical grating is adopted on the face of cylinder, and light source adopts semiconductor laser, utilizes the interference of light of two reflecting prism reflection diffractions, splits by three beam splitters and extracts angular displacement information mutually.The present invention is grouped into by angular motion part and reading portion, and in the angular motion part, the cylindrical grating concentric locking collar is contained on the main shaft, rotates with main shaft, and reading partly adopts LASER Light Source and contactless structure such as reflecting prism and beam splitter.This coder structure compactness, volume is little, explanation is high, has wide application prospect.But the precision of this invention is lower, can't carry out high-acruracy survey and repeat the location, angle, therefore, needs to propose a kind of repetition angle positioning method of solid of revolution.
Summary of the invention
The object of the present invention is to provide a kind of repetition angle positioning method of solid of revolution, the very little pivot angle that this method produces when utilizing an optical system that a revolving member is arrived a predetermined rotational positions amplifies, and the variation of this pivot angle converted to linear displacement, carry out indirect measurement then.
The objective of the invention is to realize: a kind of repetition angle positioning method of solid of revolution by following technical proposals, a solid of revolution is arranged, the axial line of this solid of revolution overlaps with rotation centerline, a servo-actuated catoptron is set on the measurement end face of described solid of revolution, this servo-actuated mirror reflects plane pass described solid of revolution axial line and with this axis parallel, the axial line quadrature of the normal of described servo-actuated mirror surface and described solid of revolution, a stationary mirror and the corresponding setting of described servo-actuated catoptron are arranged, this stationary mirror is arranged on the plane of rotation of servo-actuated catoptron, the normal of described fixation reflex minute surface is vertical with the axial line of described solid of revolution, side outside described stationary mirror is provided with a measurement light source, the incident angle of this measurement light source and stationary mirror is a little incident angle, opposite side outside described stationary mirror is provided with an optical signal receiver and signal processor, when described solid of revolution rotates in the periodical rotation mode, start measurement light source and send the measuring light signal, this light signal is transmitted on the servo-actuated catoptron by stationary mirror, arrive optical signal receiver through the light signal after repeatedly reflecting and form the displacement measurement signal, described displacement measurement signal is measured output angle locating information value by signal processor.
Compared with the prior art the present invention has following advantage:
1, uses the present invention to become the spot displacement greatly that can be easy to measure to a small angle, improved repetition angle bearing accuracy.
Description of drawings
Below in conjunction with drawings and Examples method of the present invention is described further.
Fig. 1, reflected in parallel principle schematic of the present invention
Fig. 2, servo-actuated principle of reflection synoptic diagram of the present invention
Fig. 3, optical signal receiver synoptic diagram of the present invention
Fig. 4, signal processor synoptic diagram of the present invention
Embodiment
Embodiment one:
A kind of repetition angle positioning method of solid of revolution, a solid of revolution is arranged, this solid of revolution should be installed on the frame, can on frame, rely on drive motor to rotate continuously, the axial line of this solid of revolution overlaps with rotation centerline, a servo-actuated catoptron is set on the measurement end face of described solid of revolution, the plane of reflection of this servo-actuated catoptron pass described solid of revolution axial line and with this axis parallel, the axial line quadrature of the normal of described servo-actuated mirror surface and described solid of revolution, a stationary mirror and the corresponding setting of described servo-actuated catoptron are arranged, this stationary mirror is arranged on the plane of rotation of servo-actuated catoptron, the normal of described fixation reflex minute surface is vertical with the axial line of described solid of revolution, side outside described stationary mirror is provided with a measurement light source, this measurement light source can be collimated light light source, for example a LASER Light Source.The incident angle of this measurement light source and stationary mirror is a little incident angle, and the angle value of this incident angle can be adjusted according to order of reflection, and order of reflection is many more, and incident angle is more little, otherwise incident angle is bigger.Opposite side outside described stationary mirror is provided with an optical signal receiver and signal processor, when described solid of revolution rotates in the periodical rotation mode, start measurement light source and send the measuring light signal, this light signal is transmitted on the servo-actuated catoptron by stationary mirror, arrive optical signal receiver through the light signal after repeatedly reflecting and form the displacement measurement signal, described displacement measurement signal is measured output angle locating information value by signal processor.
In order to understand the present invention preferably, the present invention is done the explanation of a principle at this, referring to Fig. 1, we use beam of laser 3 repeatedly to reflect in the middle of two stationary mirrors 1, and setting two stationary mirrors is the plane mirrors (angle is zero) that are parallel to each other.Incident angle, the reflection angle all identical (consistent) of reflection each time of this laser with initial incidence angle.Referring to Fig. 2, we are fixed up catoptron wherein, be made as stationary mirror 1, another piece catoptron is installed on the solid of revolution, be set at servo-actuated catoptron 2, in the process that solid of revolution is rotated, the angle between stationary mirror and the servo-actuated catoptron is constantly changing, and it has represented a kind of relative position between servo-actuated catoptron and the stationary mirror.When beam of laser was injected, every its incident angle of reflection through a secondary mirror can increase a α angle (α represents at the angle angle between servo-actuated catoptron and the stationary mirror).So, through after the N secondary reflection, the emergent ray that penetrates from two catoptrons and become the angle of N α between the incident light, expression angle of oscillation after this handles has been amplified effectively.
But we often directly do not measure its angle and change, if we can following formula calculating when judging the swing of angle with the method for the spot displacement of measuring emergent light: (can be similar to when little pivot angle)
ΔL∝R*Δα*(1+2+......+N)
The displacement of Δ L-luminous point;
The variation of angle between Δ α-servo-actuated catoptron and stationary mirror;
Mean distance between R-servo-actuated catoptron and stationary mirror;
N-reflection of light number of times.
Referring to Fig. 3, the optical signal receiver that the present invention uses comprises a baffle plate 5, offer two slits 4 on it, the spacing 3-5 millimeter of this slit (spacing of this slit should less than the diameter of output facula), about 0.1 millimeter of each slit width, the position of corresponding slit is provided with two photodiode A, B in the baffle plate back, and referring to Fig. 4, the signal processor that the present invention uses is made up of prime amplifier A1, prime amplifier B1, comparator circuit C, gating circuit D, AND circuit E.Two photodiode A, B are connected with prime amplifier A1, prime amplifier B1 respective signal.
When the emergent light (light signal) 6 of a branch of process two catoptrons ejaculation of the present invention passes through two slits of optical signal receivers, the hot spot that this emergent light forms shines on two slits at one time, and shine on photodiode A, the B by slit, because the relative position of each slit and hot spot is in continuous variation, the light signal strength that two photodiodes receive also can be different, and consequent electrical signal intensity also can be different.This electric signal is sent into two prime amplifiers corresponding with it respectively, sends into comparator circuit C again after signal amplifies.Variation along with facula position, it is (or opposite: A＜B that the electrical signal intensity that photodiode A and photodiode B produce will enter A＜B through the A=B state from A＞B, A=B, A＞B), thus, the positive transition or the secondary saltus step of level will appear in the output terminal of comparator circuit C, for guaranteeing that this saltus step is that we are required, have only that saltus step is only effectively (displacement measurement signal) when illumination occurring simultaneously on two photodiodes, the hopping edge of electric pulse is repeatably when circling for every time, as long as we detected this hopping edge and can determine the repeatable position of the angle repetition angle of solid of revolution (be location) this moment.
Claims (3)
1, a kind of repetition angle positioning method of solid of revolution, it is characterized in that: a solid of revolution is arranged, the axial line of this solid of revolution overlaps with rotation centerline, a servo-actuated catoptron is set on the measurement end face of described solid of revolution, this servo-actuated mirror reflects plane pass described solid of revolution axial line and with this axis parallel, the axial line quadrature of the normal of described servo-actuated mirror surface and described solid of revolution, a stationary mirror and the corresponding setting of described servo-actuated catoptron are arranged, this stationary mirror is arranged on the plane of rotation of servo-actuated catoptron, the normal of described fixation reflex minute surface is vertical with the axial line of described solid of revolution, side outside described stationary mirror is provided with a measurement light source, the incident angle of this measurement light source and stationary mirror is a little incident angle, opposite side outside described stationary mirror is provided with an optical signal receiver and signal processor, when described solid of revolution rotates in the periodical rotation mode, start measurement light source and send the measuring light signal, this light signal is transmitted on the servo-actuated catoptron by stationary mirror, arrive optical signal receiver through the light signal after repeatedly reflecting and form the displacement measurement signal, described displacement measurement signal is measured output angle locating information value by signal processor.
2, the repetition angle positioning method of solid of revolution according to claim 1 is characterized in that: the incident angle of described measurement light source and stationary mirror is a little incident angle, and the angle value of this incident angle can be adjusted according to order of reflection.
3, the repetition angle positioning method of solid of revolution according to claim 1 is characterized in that: described measurement light source is a collimated light light source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510069944 CN1862223A (en) | 2005-05-11 | 2005-05-11 | Repeat angle positioning method for rotary body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510069944 CN1862223A (en) | 2005-05-11 | 2005-05-11 | Repeat angle positioning method for rotary body |
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| CN1862223A true CN1862223A (en) | 2006-11-15 |
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| CN 200510069944 Pending CN1862223A (en) | 2005-05-11 | 2005-05-11 | Repeat angle positioning method for rotary body |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102095386A (en) * | 2010-12-01 | 2011-06-15 | 天津大学 | Two-dimensional small-angle laser-vision precise measurement device and implementation method thereof |
| CN114705138A (en) * | 2022-04-29 | 2022-07-05 | 北方民族大学 | Multi-reflection type angle measurement system and measurement method |
-
2005
- 2005-05-11 CN CN 200510069944 patent/CN1862223A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102095386A (en) * | 2010-12-01 | 2011-06-15 | 天津大学 | Two-dimensional small-angle laser-vision precise measurement device and implementation method thereof |
| CN102095386B (en) * | 2010-12-01 | 2012-12-26 | 天津大学 | Two-dimensional small-angle laser-vision precise measurement device and implementation method thereof |
| CN114705138A (en) * | 2022-04-29 | 2022-07-05 | 北方民族大学 | Multi-reflection type angle measurement system and measurement method |
| CN114705138B (en) * | 2022-04-29 | 2024-04-12 | 天航长鹰(江苏)科技有限公司 | Multi-reflection angle measurement system and measurement method |
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