CN206773000U - Twin shaft speed position turntable angular speed calibrating installation - Google Patents
Twin shaft speed position turntable angular speed calibrating installation Download PDFInfo
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- CN206773000U CN206773000U CN201720554142.1U CN201720554142U CN206773000U CN 206773000 U CN206773000 U CN 206773000U CN 201720554142 U CN201720554142 U CN 201720554142U CN 206773000 U CN206773000 U CN 206773000U
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- turntable
- reading head
- double
- angular speed
- circular gratings
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- 238000009434 installation Methods 0.000 title claims abstract description 11
- 238000012545 processing Methods 0.000 claims abstract description 11
- 238000013480 data collection Methods 0.000 claims abstract description 9
- 238000005259 measurement Methods 0.000 claims description 22
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Abstract
The utility model proposes twin shaft speed position turntable angular speed calibrating installation.Turntable is provided with table top bottom, rotary shaft on turntable, which spreads from the table, is provided with adjustable tower mandrel with one heart on shaft end, reflective Circular gratings disk is provided with adjustable on tower mandrel with one heart, diagonally two tooling fixtures are provided with the both sides of turntable, double-reading head is diagonally respectively equipped with positioned at reflective Circular gratings disk plane on tooling fixture, double-reading head is connected with data Collection ＆ Processing System respectively with circuit.The utility model is installed to the rotation shaft end of detected turntable using reflective Circular gratings, and when the axle of turntable rotates, reflective Circular gratings follow rotation, and reading head transfixion.The rotationally-varying amount of rotary shaft may determine that according to electric signal sinusoidal cycles variable quantity and phase angle.The angular speed rotated by the measuring method and data collecting system of double-reading head.Suitably used as twin shaft speed position turntable angular speed calibrating installation.
Description
Technical field
Provided by the utility model is the Measuring and calibrating equipment of mechanical field, specifically twin shaft speed position turntable angle
Speed calibrating installation.
Background technology
At present, the calibrating of twin shaft speed position turntable is mainly using regular polygonal prism body and photoelectricity, optical-autocollimator combination.
Regular polygonal prism body aims at reading as indexing standard with autocollimator；Utilize the measurement of direct single-revolution plus regular polygonal prism body amendment
Value method, it can also meet the measurement of speed position turntable Angle Position position error.Due to can only static measurement, so can not to turn
Corner of table rate error measures.This scheme can effectively eliminate the angular deviation of regular polygonal prism body in itself using full measurement in a closed series method
High-precision angle measurement can be achieved, but be only suitable for carrying out in laboratory, the short time is difficult to skillfully grasp.
The content of the invention
In order to improve angular speed calibration accuracy, the utility model provides the calibrating of twin shaft speed position turntable angular speed
Device.Phase-detection and mechanical exchanging structure of the device by electric signal, tested turn is inputed to using direct comparison method
The relative deviation of the angular speed nominal value of platform and the rate measuring system angular rate measurement average value in calibrating instrument, solves angular speed
The technical problem of calibrating.
Scheme is used by the utility model solves technical problem：
It is provided with turntable in table top bottom, the rotary shaft on turntable spreads from the table and is provided with adjustable tower core with one heart on shaft end
Axle, reflective Circular gratings disk is provided with tower mandrel with one heart adjustable, diagonally two tooling fixtures are provided with the both sides of turntable,
Diagonally be respectively equipped with double-reading head positioned at reflective Circular gratings disk plane on tooling fixture, double-reading head with circuit respectively with data
Collection is connected with processing system.
The difference input data collection of double-reading head signal and the sub-circuit in processing system, sub-circuit inputs respectively,
Output angle measuring system and angular rate measurement system, angle measuring system and angular rate measurement system input display system, angular speed jointly
Measuring system input, base when being output in standard, base input sub-circuit during standard.
Good effect, because the utility model using reflective Circular gratings is installed to the rotation shaft end of detected turntable, when
When the axle of turntable rotates, reflective Circular gratings follow rotation, and reading head transfixion.Reading head receives the light of optical grating reflection
The regular change relevant with turned position can occur for signal strength, and its changing rule is approximately sinusoidal.The strong and weak change of optical signal
Electric signal is converted to, its rule is also same sine.Rotation may determine that according to electric signal sinusoidal cycles variable quantity and phase angle
The rotationally-varying amount of rotating shaft.By the measuring method signal translating system of double-reading head, reducing eccentric error influences Angle Position test
The factor of precision.The rotation situation of turntable is obtained by data collecting system, the angular speed rotated.Suitably as twin shaft speed
Rate position turntable angular speed calibrating installation uses.
Brief description of the drawings
Fig. 1 is the utility model structure diagram；
Fig. 2 is the utility model digital collection processing system schematic diagram.
In figure, 1. turntables, 2. table tops, 3. adjustable tower mandrels with one heart, 4. reflective Circular gratings disks, 5. double-reading heads,
6. tooling fixture, 7. data Collection ＆ Processing Systems.
Embodiment
According to the figure, be provided with turntable 1 in the bottom of table top 2, the rotary shaft on turntable spread from the table be provided with shaft end it is adjustable
Formula tower mandrel 3 with one heart, reflective Circular gratings disk 4 is provided with tower mandrel with one heart adjustable, is diagonally set in the both sides of turntable
There are two tooling fixtures 6, double-reading head 5, double readings are diagonally respectively equipped with positioned at reflective Circular gratings disk plane on tooling fixture
Head circuit is connected with data Collection ＆ Processing System 7 respectively.
The difference input data collection of double-reading head signal and the sub-circuit in processing system, sub-circuit inputs respectively,
Output angle measuring system and angular rate measurement system, angle measuring system and angular rate measurement system input display system, angular speed jointly
Measuring system input, base when being output in standard, base input sub-circuit during standard.
Operation principle of the present utility model：
（One）The phase-detection of electric signal
The electric signal that signal translating system is sent out is A, B two-way orthogonal signalling, the relative position at the phase angle of two paths of signals
The rotation direction information for providing turntable is put, to provide the oeprator of the increasing or decreasing of angle.
When direction transformation occurs for rotary shaft, the migration of phase can occur for AB signals, and in transition process, it is necessary to judge
Go out the angle of migration, and the loss of any rotation information can not occur.
In Signal sampling and processing circuit board, phase demodulation and counting module are devised.There is the counting module antinoise signal to do
The effect disturbed, influence of the external interference to calibrating instrument receive capabilities is prevented, while also there are accurate phase arbitration functions,
One time provided the direction of rotation of rotary shaft, to determine the increase of angle or reduction.
（Two）Mechanical exchanging structure
Adjustable tower mandrel with one heart takes a kind of mounting means of rebound, and the rebound is pre-installed into shaft end,
The normal use of turntable is not interfered with, regulation circular runout, end face run-out to 0.005~0.01mm are then solid securely by it
It is fixed, no longer dismantle.After this, concentric tower seat need to be only installed when examining and determine turntable every time, grating disc board and grating disc are installed, most
Installation and adjustment reading head just can detect again afterwards, improve quality assurance and speed.
（Three）The error of grating setting-up eccentricity introducing is eliminated using double-reading head circumference diameter mounting means
Using magnet as stand base, gantry slide rail type double-reading head adjustment support, diagonally installed using two-way grating
Mode carry out angular surveying, i.e., one reading head is installed respectively in the relative both direction of the circle diameter of Circular gratings ring,
When measuring, the average value by gathering two reading head data is used as the angular position measurement data of main shaft rotation.From
The angle error of two grating reading heads is equal in magnitude in principle, in the opposite direction, can be complementary, and Circular gratings are reduced or eliminated
The error in reading that ring setting-up eccentricity is brought.
（Four）Grating measuring subdivision error is reduced using Moire fringe interpolation and sine and cosine subdividing technology
To solve the problems, such as that grating rotation pitch angle measurement accuracy is not high, pass through compensation circuit and design raising moire frange signal
Constant amplitude, orthogonality and stability, the starting point and the amplitude of end point rotated from grating calculate phase, therefore can be more smart
The angle of grating disc rotation is really calculated, realizes Moire fringe interpolation；Signal is gathered to grating using a difference amplifier
Handled, by plus and minus calculation so as to obtain a new vector, to ensure the difference obtained with two-way photodetector, together
When these sine waves constant phase difference, can reach Moire fringe interpolation frequency multiplication, improve system resolution, more segment
Effect, so as to reduce the subdivision error of grating measuring from data processing method.
The course of work of the present utility model：
1st, adjustable tower mandrel with one heart is arranged on the shaft end of turntable measured axis, rotates measured axis, utilize amesdial
Using signing method, adjustable perpendicularity≤0.003mm of tower mandrel axial direction basal plane and measured axis axis of rotation with one heart, inspection are detected
Concentricity≤0.003mm of adjustable tower mandrel and measured axis with one heart is surveyed, passes through the freqency fine adjustment machine of adjustable tower mandrel with one heart
Structure, by adjustable tower mandrel axial direction basal plane and the perpendicularity of measured axis axis of rotation and adjustable concentric tower mandrel with one heart and
The concentricity of measured axis is adjusted to permit in the range of value, is fastened with fastening screw.
2nd, it is arranged on adjustable tower core with one heart using the reflective Circular gratings disk key light grid of high accuracy in calibrating instrument as dynamic chi
On axle, fastened with clamp nut.
3rd, double-reading head indication grating is equipped with into tooling fixture as scale to be fixed on tested turntable fixed mesa, and point
Diagonal 180 ° of directions of key light grid are not positioned over.
4th, revolving-turret, revolution drive the reflective Circular gratings synchronous rotary of high accuracy, adjustment double-reading head and Circular gratings disk
Relative gap, when the green indicating lamp on double-reading head is bright, show that optical-mechanical system is working properly, now by double-reading head position
It is fixed.
5th, turntable TT＆C system is started, measured axis is interior not by technical requirements and vertification regulation the requirement successively anglec of rotation one week
Less than 24 points, when tested rotation of rotary table axle rotates, the reflective Circular gratings key light grid of high accuracy are driven synchronously to be revolved as dynamic chi
Turn, double-reading head indication grating is fixed as scale, and calibrating instrument angle measuring system measures the angle value of respective point simultaneously.
6th, it is tested turntable and is in angular speed working condition, by given angular speed ω instruction speed stabilizing operatings, according to angular speed
Angular spacing θ is determined in instruction size selection, calculates the sampling time, synchronous to latch inspection after turntable is with defined angular speed stable operation
Determine instrument angle measurement, calculate angular speed value, it is continuous to measure 10 times.When angular speed is less than 0.001 °/s, pendulous frequency is many
In 4 times.
In formula：ωi--- the angular speed value of single measurement；
--- the angular speed average value of n measurement；
N --- certain continuous pendulous frequency of angular speed point；
Eω--- angular speed error.
The characteristics of the utility model：
Combined and made as scale as dynamic chi, double-reading head indication grating using the reflective Circular gratings disk key light grid of high accuracy
It is the core of calibrating installation to index standard.During with its measuring circurmarotate, influenceing the main source of error of accuracy of measurement is
Circular gratings disk master and eccentric error caused by turntable measured axis nonconcentricity.In order to eliminate eccentric error, using double-reading head point
The method in the diagonal 180 ° of positions of Circular gratings disk is put, eccentric error can be effectively eliminated using positive and negative principle of cancellation.And use simultaneously
Circular gratings long period sub-circuit, by Moire fringe pitch caused by Circular gratings is precisely subdivided and the error of division compensates skill point by point
Art, High-precision angle measurement can be achieved, substitute the measuring method of regular polygonal prism body and autocollimator combination.Base when being equipped with standard again
The angular speed error measure of high accuracy can be achieved.
（One）Structure composition
Twin shaft speed position turntable angular speed calibrating installation be for on-site proving turntable rotary shaft position, speed precision and
The calibration equipment of design, using circumference equal dividing principle, live inspection can be carried out to turntable Angle Position position error, angular speed error etc.
Survey.
Inertia test equipment turntable calibrating instrument is mainly made up of five parts：Adjustable tower mandrel with one heart, high accuracy reflection
Formula Circular gratings, double-reading head, tooling fixture and data Collection ＆ Processing System.
（Two）Functions
High-precision reflective gratings --- the light that reflectance hair goes out, become by light and reading head offer turntable is provided
Movable information.
（1）Reading head --- transmitting light gives reflective Circular gratings, and receives the reflection light of Circular gratings, the change of light
Change the voltage or current signal for being converted to change, as measurement signal.
（2）Signal translating system --- the conversion operation such as it is finely divided, corrects to the electric signal that reading head is sent, reduces
Systematic error.
（3）Data Acquisition System --- signal is sent to signal translating system and handled, obtains turntable motion
Information, and by the way that measured value is calculated, it is shown to user.
Tooling fixture --- to install the offer support of reflective Circular gratings, reading head, can Fast Installation, and ensure
Measurement accuracy.
Claims (1)
1. twin shaft speed position turntable angular speed calibrating installation, it is characterized in that：In table top（2）Bottom is provided with turntable（1）, on turntable
Rotary shaft spread from the table adjustable tower mandrel with one heart be installed on shaft end（3）, it is provided with one heart on tower mandrel adjustable
Reflective Circular gratings disk（4）, diagonally two tooling fixtures are provided with the both sides of turntable（6）, it is located at reflective circle on tooling fixture
Grating disc plane is diagonally respectively equipped with double-reading head（5）, double-reading head with circuit respectively with data Collection ＆ Processing System（7）Phase
Connection；The difference input data collection of double-reading head signal is inputted, exported with the sub-circuit in processing system, sub-circuit respectively
Angle measuring system and angular rate measurement system, angle measuring system and angular rate measurement system input display system, angular rate measurement jointly
System input, base when being output in standard, base input sub-circuit during standard.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720554142.1U CN206773000U (en) | 2017-05-18 | 2017-05-18 | Twin shaft speed position turntable angular speed calibrating installation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720554142.1U CN206773000U (en) | 2017-05-18 | 2017-05-18 | Twin shaft speed position turntable angular speed calibrating installation |
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| Publication Number | Publication Date |
|---|---|
| CN206773000U true CN206773000U (en) | 2017-12-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720554142.1U Expired - Fee Related CN206773000U (en) | 2017-05-18 | 2017-05-18 | Twin shaft speed position turntable angular speed calibrating installation |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109163678A (en) * | 2018-10-18 | 2019-01-08 | 江苏兰菱机电科技有限公司 | Double read head grating angle-measuring equipments |
| CN109612411A (en) * | 2019-02-18 | 2019-04-12 | 重庆建设工业(集团)有限责任公司 | A kind of open type double-reading head Circular gratings system Fast Installation adjustment mechanism |
| CN110081837A (en) * | 2019-05-20 | 2019-08-02 | 中国科学院光电技术研究所 | A method of by detecting shafting shaking and eccentric error using angle measurement Circular gratings and reading head |
| CN112296754A (en) * | 2020-10-30 | 2021-02-02 | 谢泽兵 | Rotation angle precision detection device and method based on laser detection system |
| CN112697190A (en) * | 2020-12-18 | 2021-04-23 | 中国计量大学 | Dynamic calibration method for grating moire signal phase-locked subdivision errors |
-
2017
- 2017-05-18 CN CN201720554142.1U patent/CN206773000U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109163678A (en) * | 2018-10-18 | 2019-01-08 | 江苏兰菱机电科技有限公司 | Double read head grating angle-measuring equipments |
| CN109612411A (en) * | 2019-02-18 | 2019-04-12 | 重庆建设工业(集团)有限责任公司 | A kind of open type double-reading head Circular gratings system Fast Installation adjustment mechanism |
| CN110081837A (en) * | 2019-05-20 | 2019-08-02 | 中国科学院光电技术研究所 | A method of by detecting shafting shaking and eccentric error using angle measurement Circular gratings and reading head |
| CN110081837B (en) * | 2019-05-20 | 2021-05-07 | 中国科学院光电技术研究所 | Method for detecting shafting shaking and eccentric error by utilizing angle measuring circular grating and reading head |
| CN112296754A (en) * | 2020-10-30 | 2021-02-02 | 谢泽兵 | Rotation angle precision detection device and method based on laser detection system |
| CN112697190A (en) * | 2020-12-18 | 2021-04-23 | 中国计量大学 | Dynamic calibration method for grating moire signal phase-locked subdivision errors |
| CN112697190B (en) * | 2020-12-18 | 2023-09-15 | 中国计量大学 | Dynamic calibration method for phase-locked subdivision error of grating moire signal |
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