CN108318068A - A kind of high and low temperature environment lower angle calibrating installation and method - Google Patents
A kind of high and low temperature environment lower angle calibrating installation and method Download PDFInfo
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- CN108318068A CN108318068A CN201810413279.4A CN201810413279A CN108318068A CN 108318068 A CN108318068 A CN 108318068A CN 201810413279 A CN201810413279 A CN 201810413279A CN 108318068 A CN108318068 A CN 108318068A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D18/00—Testing or calibrating apparatus or arrangements provided for in groups G01D1/00 - G01D15/00
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Abstract
The invention discloses a kind of high and low temperature environment lower angle measuring devices, including：High and low temperature environment case, thermal insulation ring, measured axis, standard angle encoder, laptop, vibration isolation table, fixed ring, fixing bracket, fixed platform, fine adjustment stage, circular arc, rib frame, first bolt, second bolt, ball bearing, ball bearing inner wall, ball and ball bearing outer wall, the ball bearing inner wall and measured axis phase secure fit, when measured axis rotates, convert sliding friction to the rolling friction of ball and ball bearing inner wall and ball bearing outer wall in ball bearing, reduce the additional torque that frictional force is brought, the ball bearing is high temperature resistant bearing, completely cut off the influence come with ambient temperature convective zone inside high and low temperature environment case, the present invention solves the problems, such as to be difficult to carry out angle calibration system to encoder in the high/low temperature test environment of ground.
Description
Technical field
The present invention relates to angle measurement field, more particularly to a kind of high and low temperature environment lower angle calibrating installation and method.
Background technology
As China is in the development for carrying out the great aerospace engineering fields such as space station construction, moon exploration program and mars exploration
In implementation process, since too air environment temperature is changeable, up to 100 DEG C when high temperature, when low temperature, is -100 DEG C reachable, therefore has big
Accurate, the complicated mechanism of amount and component need, in extreme environments such as ground simulation space vacuum, high/low temperatures, to carry out mechanism assembly essence
The test of the multinomial performances such as degree, transmission efficiency, vibration, power and torque, rigidity and unit for electrical property parameters and Reliability Check, are come with this
Calibration test is carried out to measuring device, prevents from being emitted into space in application, generating failure, economy be caused irremediable
Loss, since the environment anti-interference of angular encoder is preferable, the application of measurement angle is more and more wider under high and low temperature environment
It is general.
Currently, the calibrating of state's inner opposite angle degree encoder is mainly according to JJF 1115-2004《Optical electric axial angle encoder is calibrated
Specification》, encoder is calibrated using autocollimator, when calibration, be calibrated encoder and autocollimator should have it is enough flat
Weigh temperature-time, should usually be no less than 2h.Being calibrated encoder should start to calibrate after powering on 10min, and when calibrating
Temperature should be 20 ± 2 DEG C, temperature change≤5 DEG C.
In conclusion at present school can only be carried out to the encoder under normal temperature environment in the existing angle calibration system device in China
Standard can not carry out encoder in the device of angle calibration system in the environment of ground simulation space high/low temperature.
Invention content
To solve the above-mentioned problems, the present invention provides a kind of high and low temperature environment lower angle calibrating installation and methods.
The technical solution adopted by the present invention is：A kind of high and low temperature environment lower angle calibrating installation, including：High and low temperature environment
It is case, thermal insulation ring, measured axis, standard angle encoder, laptop, vibration isolation table, fixed ring, fixing bracket, fixed platform, micro-
Leveling platform, circular arc, rib frame, the first bolt, the second bolt, ball bearing, ball bearing inner wall, ball, ball bearing outer wall, quilt
Sensor and motor are surveyed, the high and low temperature environment case is placed on vibration isolation table in same level, the vibration isolation table left end
It fits with high and low temperature environment case, thermal insulation ring, the thermal insulation ring has been bolted on the right side of the high and low temperature environment case
High and low temperature environment case can be isolated to greatest extent with external environment, reduce high and low temperature environment case internal and external temperature and exchange, institute
It is provided with circular hole among the thermal insulation ring stated, ball bearing is installed among the thermal insulation ring, measured axis is penetrated by ball bearing
In high and low temperature environment case, the left side of the measured axis is connected with tested angle encoder, the tested angle encoder
Left side, which is connected to the motor, to be connect, and is connected with standard angle encoder on the right side of the measured axis, the standard angle encoder
Lower part is equipped with fixing bracket, and the fixing bracket upper end is provided with circular arc, the circular arc size and standard angle encoder
Outer diameter match, fixed ring is mounted on before and after the lower part of the standard angle encoder, the fixed ring passes through spiral shell
Bolt is fixed on fixing bracket, and the fixing bracket is fixed on the stationary platform by the first bolt of rib frame bottom, described
Fixed platform be bolted on above fine adjustment stage, the fine adjustment stage can adjust the height of fixed platform, institute
Rib frame is provided on the fixing bracket stated, circular arc processing is made in four corner of fixing bracket, and the fine adjustment stage passes through
Two bolts are fixed on the upper surface of vibration isolation table.
Further embodiment, the ball bearing inner wall and measured axis phase secure fit will be slided when measured axis rotates
Friction is converted into the rolling friction of ball and ball bearing inner wall and ball bearing outer wall in ball bearing, reduces frictional force and brings
Additional torque, the ball bearing is high temperature resistant bearing, inside isolation high and low temperature environment case with ambient temperature convection current
The influence brought prevents from affecting local temperature in high and low temperature environment case.
A kind of high and low temperature environment lower angle calibration method, using above-mentioned device, tested angle encoder is mounted on height
In warm environmental cabinet, standard angle encoder is mounted on outside high and low temperature environment case in normal temperature environment, in order to be encoded to tested angle
Device is calibrated, and this method is used by driving the rotation of tested angle encoder by motor, and measured axis is by tested angle encoder
Angle displacement θIt is testedIt is transmitted in external normal temperature environment from high and low temperature environment case, then the standard by being connected on measured axis
Angular encoder measures angle displacement θ at this timeStandard.The specific method is as follows：
First, tested angle encoder rotates an angle, θ by zero-bitTested 1, while by measured axis by angle displacement
It is transferred to standard angle encoder, the angular displacement for recording standard angle encoder at this time reads θStandard 1.Then stop in first time
Position rotate an angle again, the angle of tested angle encoder is θTested 2, while recording standard angle encoder at this time
Angular displacement read θStandard 2, in this twice measurement process, what moment of friction that rolling friction in ball bearing generates was brought
Added angle error is respectively：θ′0、θ″0。
Then this is tested the actual standard angle θ ' in end twice in measurement processStandardθ is read with standard transducerStandardBetween
Relationship is：
θ′Standard 1=θ '0=θStandard 1,
θ′Standard 2=θ "0=θStandard 2,
Using relative measurement, the measurement error Δ between tested angle encoder gained angle and actual standard angle
θ is：
Δ θ=Δ θ 'Standard-ΔθIt is tested
=(θ 'Standard 2-θ′Standard 1)-(θTested 2-θTested 1)
=[(θStandard 2+θ″0)-(θStandard 1+θ′0)]-(θTested 2-θTested 1)
=(θStandard 2-θStandard 1)-(θTested 2-θTested 1)+(θ″0-θ′0)
=Δ θStandard-ΔθIt is tested+Δθ0
In measuring twice, measuring condition is substantially completely consistent, and the added angle error theta that moment of friction is brought '0、θ″0It can
Think approximately equal.Therefore Δ θ0=(θ "0-θ′0) ＜ ＜ (θ "0Or θ '0)≈0。
I.e.：
Δ θ=Δ θStandard-ΔθIt is tested,
The additional angle error theta that rolling friction is brought is reduced by relative measurement method0Influence, improve calibration measurement
Precision.
The advantageous effect of this programme is mainly reflected in：
1. a kind of high and low temperature environment lower angle calibrating installation and method will be pacified using the method for the angle displacement that axis transmits
The rotational angle that tested angle encoder in high and low temperature environment case occurs is transmitted to the room temperature of the other end mounted on axis
On standard angle encoder in environment, due to the high certainty of measurement of the present apparatus, it is therefore desirable to which the influence that abatement friction is brought is adopted
It converts sliding friction to rolling friction with ball bearing, to reduce the influence for the additional torque that friction is brought, and uses
Ball bearing be high temperature resistant bearing, the influence come with ambient temperature convective zone inside isolation high and low temperature environment case prevents
Local temperature in high and low temperature environment case is affected.
2. a kind of high and low temperature environment lower angle calibrating installation and method, although converting the sliding friction of measured axis to
Rolling friction, but due to the high certainty of measurement of the present apparatus, it is therefore desirable to the influence that abatement friction is brought again, this method use
The method of relative measurement, it is poor that the data measured twice are made, and approximate to regard the numerical values recited that rolling friction twice is brought as identical, from
And further decrease the influence that rolling friction is brought.
Description of the drawings
Fig. 1 is the external structure of the present invention；
Fig. 2 is the partial enlarged view of the present invention；
Fig. 3 is the local structural graph of the present invention；
Fig. 4 is the ball bearing sectional view of the present invention.
Specific implementation mode
In order to which technological means, creation characteristic, the purpose reached and effect of the present invention are easy to understand, with reference to
It is specifically illustrating, the present invention is further explained.It should be noted that in the absence of conflict, the embodiment in the application and reality
Applying the feature in example can be combined with each other.
As shown in Figures 1 to 4, a kind of high and low temperature environment lower angle calibrating installation, including：High and low temperature environment case, thermal insulation ring,
Measured axis, standard angle encoder, laptop, vibration isolation table, fixed ring, fixing bracket, fixed platform, fine adjustment stage, circle
Arc, rib frame, the first bolt, the second bolt, ball bearing, ball bearing inner wall, ball, ball bearing outer wall, tested sensor
And motor, the high and low temperature environment case are placed on vibration isolation table in same level, the vibration isolation table left end and high/low temperature
Environmental cabinet fits, and thermal insulation ring has been bolted on the right side of the high and low temperature environment case, and the thermal insulation ring can be maximum
High and low temperature environment case is isolated by limit with external environment, is reduced high and low temperature environment case internal and external temperature and is exchanged, the thermal insulation
It is provided with circular hole among ring, ball bearing is installed among the thermal insulation ring, measured axis penetrates high/low temperature ring by ball bearing
In the case of border, the left side of the measured axis is connected with tested angle encoder, on the left of the tested angle encoder and electric
Machine is connected, and is connected with standard angle encoder on the right side of the measured axis, standard angle encoder lower part installation
There are fixing bracket, the fixing bracket upper end to be provided with circular arc, the outer diameter phase of the circular arc size and standard angle encoder
Coordinate, is mounted on fixed ring before and after the lower part of the standard angle encoder, the fixed ring is bolted on
On fixing bracket, the fixing bracket is fixed on the stationary platform by the first bolt of rib frame bottom, and the fixation is flat
Platform is bolted on above fine adjustment stage, and the fine adjustment stage can adjust the height of fixed platform, the fixation
Rib frame is provided on holder, circular arc processing is made in four corner of fixing bracket, and the fine adjustment stage is solid by the second bolt
It is scheduled on the upper surface of vibration isolation table.
Further embodiment, the ball bearing inner wall and measured axis phase secure fit will be slided when measured axis rotates
Friction is converted into the rolling friction of ball and ball bearing inner wall and ball bearing outer wall in ball bearing, reduces frictional force and brings
Additional torque, the ball bearing is high temperature resistant bearing, inside isolation high and low temperature environment case with ambient temperature convection current
The influence brought prevents from affecting local temperature in high and low temperature environment case.
A kind of high and low temperature environment lower angle calibration method, using above-mentioned apparatus, tested angle encoder is mounted on high/low temperature
In environmental cabinet, standard angle encoder is mounted on outside high and low temperature environment case in normal temperature environment, in order to tested angle encoder
It is calibrated, this method is used by driving the rotation of tested angle encoder by motor, and measured axis is by tested angle encoder
Angle displacement θIt is testedIt is transmitted in external normal temperature environment from high and low temperature environment case, then the standard angle by being connected on measured axis
Degree encoder measures angle displacement θ at this timeStandard。
In conventional method：
After tested angle encoder rotates an angle since zero-bit, it is θ that can obtain tested angle encoder countIt is tested, mark
Quasi- angular encoder readings are θStandard, existing error is Δ θ between the two, since tested angle encoder is since zero-bit
Absolute measurement, so：
Δ θ=Δ θStandard-ΔθIt is tested
=(θStandard-0)-(θIt is tested-0)
=θStandard-θIt is tested
In the present invention, although converting in ball bearing in ball and ball bearing the sliding friction of measured axis to
The rolling friction of wall and ball bearing outer wall, but still the additional angle error theta for thering is rolling friction to bring0, therefore the reality at tested end
Border standard angle θ 'Standard=θStandard+θ0, then the measurement error between angle and actual standard angle obtained by tested angle encoder
For：
Δ θ=θ 'Standard-θIt is tested=(θStandard+θ0)-θIt is tested,
Due to the high certainty of measurement that the present apparatus requires, and the additional angle error theta that rolling friction is brought0It is difficult to measure, because
This present invention further decreases the additional angle error theta that rolling friction is brought using relative measurement0Influence：
First, tested angle encoder rotates an angle, θ by zero-bitTested 1, while by measured axis by angle displacement
It is transferred to standard angle encoder, the angular displacement for recording standard angle encoder at this time reads θStandard 1.Then stop in first time
Position rotate an angle again, the angle of tested angle encoder is θTested 2, while recording standard angle encoder at this time
Angular displacement read θStandard 2, in this twice measurement process, what moment of friction that rolling friction in ball bearing generates was brought
Added angle error is respectively：θ′0、θ″0。
Then this is tested the actual standard angle θ ' in end twice in measurement processStandardθ is read with standard transducerStandardBetween
Relationship is：
θ′Standard 1- θ ' 0=θStandard 1,
θ′Standard 2- θ " 0=θStandard 2,
Using relative measurement, the measurement error Δ between tested angle encoder gained angle and actual standard angle
θ is：
Δ θ=Δ θ 'Standard-ΔθIt is tested
=(θ 'Standard 2-θ′Standard 1)-(ΔθTested 2-θTested 1)
=[(θStandard 2+θ″0)-(θStandard 1+θ″0)]-(θTested 2-θTested 1)
=(θStandard 2-θStandard 1)-(θTested 2-θTested 1)+(θ″0-θ′0)
=Δ θStandard-ΔθIt is tested+Δθ0
In measuring twice, measuring condition is substantially completely consistent, and the added angle error theta that moment of friction is brought '0、θ″0It can
Think approximately equal.Therefore Δ θ0=(θ "0-θ′0) ＜ ＜ (θ "0Or θ '0)≈0。
I.e.：
Δ θ=Δ θStandard-ΔθIt is tested,
The additional angle error theta that rolling friction is brought is reduced by relative measurement method0Influence, improve calibration measurement
Precision.
The basic principles, main features and advantages of the invention have been shown and described above.The technical staff of the industry should
Understand, the present invention is not limited to the above embodiments, and the description in above embodiments and description only illustrates the present invention
Principle, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these change and change
Into all fall within the protetion scope of the claimed invention.The claimed scope of the invention is by appended claims and its equivalent
It defines.
Claims (4)
1. a kind of high and low temperature environment lower angle calibrating installation, which is characterized in that described device includes：High and low temperature environment case (1), every
Wen Huan (2), measured axis (3), standard angle encoder (4), laptop (5), vibration isolation table (6), fixed ring (7), fixed branch
Frame (8), fixed platform (9), fine adjustment stage (10), circular arc (11), rib frame (12), the first bolt (13), the second bolt (14), rolling
Pearl bearing (15), ball bearing inner wall (16), ball (17), ball bearing outer wall (18), tested sensor (19) and motor
(20) (20), the high and low temperature environment case (1) are placed on vibration isolation table (6) in same level, and the vibration isolation table (6) is left
End fits with high and low temperature environment case (1), and thermal insulation ring (2), institute have been bolted on the right side of the high and low temperature environment case (1)
High and low temperature environment case (1) can be isolated by the thermal insulation ring (2) stated with external environment to greatest extent, reduce high and low temperature environment case
(1) internal and external temperature exchanges, and circular hole is provided among the thermal insulation ring (2), ball bearing is equipped among the thermal insulation ring (2)
(15), measured axis (3) is penetrated by ball bearing (15) in high and low temperature environment case (1), the left side of the measured axis (3) and quilt
Measuring angle encoder (19) is connected, and is connected with motor (20) on the left of the tested angle encoder (19), the quilt
It surveys on the right side of axis (3) and is connected with standard angle encoder (4), described standard angle encoder (4) lower part is equipped with fixed branch
Frame (8), the fixing bracket (8) upper end are provided with circular arc (11), the circular arc (11) size and standard angle encoder (4)
Outer diameter match, be mounted on fixed ring (7), the fixed ring before and after the lower part of the standard angle encoder (4)
(7) it is bolted on fixing bracket (8), the first bolt that the fixing bracket (8) passes through rib frame (12) bottom
(13) it is fixed in fixed platform (9), the fixed platform (9) is bolted on fine adjustment stage (10) above, described
Fine adjustment stage (10) height of fixed platform (9) can be adjusted, be provided with rib frame (12) on the fixing bracket (8), it is described
(8) four corner of fixing bracket make circular arc processing, the fine adjustment stage (10) is fixed on vibration isolation by the second bolt (14)
The upper surface of platform (6).
2. a kind of high and low temperature environment lower angle calibrating installation according to claim 1, it is characterised in that：The ball axis
Inner wall (16) and measured axis (3) phase secure fit are held, when measured axis (3) rotates, ball (17) and ball in ball bearing (15)
Friction between bearing inner wall (16) and ball bearing outer wall (18) is rolling friction.
3. a kind of high and low temperature environment lower angle calibrating installation according to claim 1, it is characterised in that：The ball axis
It is high temperature resistant bearing to hold (15).
4. a kind of high and low temperature environment lower angle calibration method is applied to the device described in claim 1, which is characterized in that quilt
Measuring angle encoder (19) is mounted in high and low temperature environment case (1), and standard angle encoder (4) is mounted on high and low temperature environment case
(1) in external normal temperature environment, the method is used to calibrate tested angle encoder (19), the method includes：
Tested angle encoder (19) rotates an angle, θ by zero-bitTested 1, while measured axis (3) passes through ball bearing (15)
Angle displacement is transferred to standard angle encoder (4), the angular displacement reading of record first time standard angle encoder (4)
θStandard 1；
In the position that first time stops, tested angle encoder (19) rotates an angle, θ againTested 2, while measured axis (3) is logical
It crosses ball bearing (15) and angle displacement is transferred to standard angle encoder (4), second of standard angle encoder (4) of record
Angular displacement reads θStandard 2；
Calculate the tested actual standard angle θ in endStandard, the θStandardCalculating process be：
θ’Standard 1-θ’0=θStandard 1
θ’Standard 2-θ’0=θStandard 2
Wherein, the θ '0When to rotate for the first time, volume that moment of friction that rolling friction in ball bearing (15) generates is brought
Outer angular error, the θ "0When being rotated for second, what moment of friction that the rolling friction in ball bearing (15) generates was brought
Added angle error；
Determine that the measurement between angle and actual standard angle obtained by tested angle encoder (19) misses using relative measurement
Poor Δ θ is that the specific calculating process of the Δ θ is：
Δ θ=Δ θ 'Standard-ΔθIt is tested
=(θ 'Standard 2-θ’Standard 1)-(θTested 2-θTested 1)
=[(θStandard 2+θ”0)-
(θStandard 1+θ’0)]-(θTested 2-θTested 1)
=(θStandard 2-θStandard 1)-(θTested 2-θTested 1)
+(θ”0-θ’0)
=Δ θStandard-ΔθIt is tested+Δθ0
Wherein, in measuring twice, measuring condition is substantially completely consistent, the added angle error theta that moment of friction is brought '0、θ”0It can
Think approximately equal, i.e. Δ θ0=(θ "0-θ’0)《(θ”0Or θ '0)≈0。
As a result it is：
Δ θ=Δ θStandard-ΔθIt is tested。
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810413279.4A CN108318068A (en) | 2018-05-03 | 2018-05-03 | A kind of high and low temperature environment lower angle calibrating installation and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810413279.4A CN108318068A (en) | 2018-05-03 | 2018-05-03 | A kind of high and low temperature environment lower angle calibrating installation and method |
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| Publication Number | Publication Date |
|---|---|
| CN108318068A true CN108318068A (en) | 2018-07-24 |
Family
ID=62895613
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102128646A (en) * | 2010-12-27 | 2011-07-20 | 中国科学院长春光学精密机械与物理研究所 | High-low temperature precision detector for small photoelectric encoder |
| CN105424073A (en) * | 2015-12-29 | 2016-03-23 | 中国科学院长春光学精密机械与物理研究所 | Incremental photoelectric encoder precision detection system |
| CN205228503U (en) * | 2015-12-23 | 2016-05-11 | 四川红光汽车机电有限公司 | High accuracy photoelectric encoder automatic checkout device |
| CN107830808A (en) * | 2017-12-01 | 2018-03-23 | 中国计量大学 | A kind of calibration method and device of high and low temperature environment grating displacement sensor |
| CN208432284U (en) * | 2018-05-03 | 2019-01-25 | 中国计量大学 | A kind of high and low temperature environment lower angle calibrating installation |
-
2018
- 2018-05-03 CN CN201810413279.4A patent/CN108318068A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102128646A (en) * | 2010-12-27 | 2011-07-20 | 中国科学院长春光学精密机械与物理研究所 | High-low temperature precision detector for small photoelectric encoder |
| CN205228503U (en) * | 2015-12-23 | 2016-05-11 | 四川红光汽车机电有限公司 | High accuracy photoelectric encoder automatic checkout device |
| CN105424073A (en) * | 2015-12-29 | 2016-03-23 | 中国科学院长春光学精密机械与物理研究所 | Incremental photoelectric encoder precision detection system |
| CN107830808A (en) * | 2017-12-01 | 2018-03-23 | 中国计量大学 | A kind of calibration method and device of high and low temperature environment grating displacement sensor |
| CN208432284U (en) * | 2018-05-03 | 2019-01-25 | 中国计量大学 | A kind of high and low temperature environment lower angle calibrating installation |
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