CN107655931A - A kind of high-precision cylinder linear expansion coefficient measurement apparatus and method - Google Patents
A kind of high-precision cylinder linear expansion coefficient measurement apparatus and method Download PDFInfo
- Publication number
- CN107655931A CN107655931A CN201710675747.0A CN201710675747A CN107655931A CN 107655931 A CN107655931 A CN 107655931A CN 201710675747 A CN201710675747 A CN 201710675747A CN 107655931 A CN107655931 A CN 107655931A
- Authority
- CN
- China
- Prior art keywords
- mirror
- amici prism
- cylinder
- speculum
- connection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/16—Investigating or analyzing materials by the use of thermal means by investigating thermal coefficient of expansion
-
- 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
- G01B11/16—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge
- G01B11/161—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge by interferometric means
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Instruments For Measurement Of Length By Optical Means (AREA)
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Abstract
A kind of high-precision cylinder linear expansion coefficient measurement apparatus and method, its device include connection Amici prism component (1), quartzy tube assembly (2), connection mirror assembly (3), V-block assembly (4).Connection Amici prism component (1) and connection mirror assembly (3) are installed on lower flange both ends on cylinder to be measured (5), quartzy tube assembly (2) is installed in the V-groove of connection Amici prism component (1) and connection mirror assembly (3), during temperature change, the difference of the amount of movement of measurement speculum and reference mirror represents the difference of the length change amount of part to be measured and reference member, also as interferometer reading.The present invention can be not only used for measuring the linear expansion coefficient of composite cylinder structure, moreover it is possible to change the linear expansion coefficient for measuring composite rod member and truss structure as adaptability.Measurement apparatus of the present invention has the characteristics of device requirement is few, easy to use, environmental suitability is strong, efficiency high, high precision.
Description
Technical field
The present invention relates to a kind of high-precision cylinder linear expansion coefficient measuring method, particularly one kind to answer available for space camera
The easy device and method of the linear expansion coefficient test of condensation material cylinder.
Background technology
Space flight high resolution camera uses cylinder as supporting construction more, the interval between each optical element caused by temperature
Change will be determined that therefore, the cylinder for space flight high resolution camera all has temperature line expansion by the linear expansion coefficient of cylinder
The characteristics of coefficient is small.Carbon carborundum (C/SiC) material is the advanced composite material (ACM) to grow up in recent years, has preferably heat steady
It is qualitative, it is simultaneously in light weight compared with high specific stiffness the features such as, become the preferred material of spatial high resolution camera.But carbon carborundum
(C/SiC) cylinder employs the shaping of carbon fiber 3 D weaving SiC reinforcement, its linear expansion coefficient and fiber linear expansion coefficient phase
Difference is very big, and linear expansion coefficient of the cylinder in three directions is different.Ensure that cylinder linear expansion coefficient refers to as key performance
Mark meets requirement, its linear expansion coefficient in use range is accurately measured, and the key measured exists
In measure its length because of caused by temperature change change, traditional measuring method exist accuracy of measurement it is low, dress
Put the defects of huge.
The content of the invention
The technology of the present invention solves problem：With reference to interference length-measuring principle, using measurement of comparison method, symmetrical survey is devised
Light path is measured, influence of the other factors to test is eliminated, ensures measuring accuracy, there is provided a kind of easy to operate, general accurately measurement
The method of the linear expansion coefficient of structure.
The technology of the present invention solves problem and is achieved by the following technical programs：A kind of high-precision cylinder linear expansion coefficient is surveyed
Device, including connection Amici prism component (1), quartzy tube assembly (2), connection mirror assembly (3), V-block assembly (4) are measured,
The both ends of cylinder (5) to be measured are provided with upper flange and lower flange,
The position at each position and annexation：Connection Amici prism component (1) and connection mirror assembly (3) are installed on and treated
Survey lower flange both ends on cylinder (5), on cylinder to be measured (5) after, connection Amici prism component (1) and connect speculum group
Two relative faces of part (3) are provided with V-groove,
The both ends of quartzy tube assembly (2) are respectively arranged in connection Amici prism component (1) and connection mirror assembly (3)
V-groove in；
Cylinder (5) to be measured is installed in V-block assembly (4), and regulation V-block assembly (4) makes the central axis phase of cylinder (5)
Horizontal for ground level, adjustment connection Amici prism component (1), quartzy tube assembly (2) and connection mirror assembly (3) are with respect to position
The relation of putting make to be placed on connection Amici prism component (1) opposite side interferometer receive it is incident from connection Amici prism component (1)
The signal intensity for entering interferometer after connection mirror assembly (3) reflection is maximum；
The device is needed under controlled temperature conditions, and the length change amount under cylinder to be measured (5) different temperatures is recorded by interferometer,
According to the length change amount under different temperatures, the linear expansion coefficient of cylinder to be measured (5) is finally calculated.
Described connection Amici prism component (1) includes Amici prism component (11), Amici prism connector A (12) and divided
Light prism connector B (13)；
Amici prism component (11) and Amici prism connector A (12) are connected with Amici prism connector B (13), light splitting
Prism connector B (13) is connected with cylinder to be measured (5) end flange, and V-shaped groove is provided with Amici prism connector A (12)；
As shown in figure 4, Amici prism component (11) include polarization spectro component (111), Amici prism mirror cell (112), point
Light prism left cover (113) and Amici prism right cover (114)；
Polarization spectro component (111) is installed in Amici prism mirror cell (112), Amici prism left cover (113) and light splitting rib
Mirror right cover (114) covers polarization spectro component (111) together, shields；
Polarization spectro component (111), including four pieces of prisms, be followed successively by from top to bottom speculum 1, spectroscope 1, spectroscope 2,
Speculum 2, spectroscope 1 and spectroscope 2 are combined into a square, and the intersection of spectroscope 1 and spectroscope 2 is the He of spectroscope 1
The cemented surface of spectroscope 2；
Laser beam is incident from spectroscope 1, and a part of light is transmitted through connection instead by the cemented surface of spectroscope 1 and spectroscope 2
Mirror assembly (3) is penetrated, after connection mirror assembly (3) reflection, spectroscope 2 is incided, by spectroscope 1 and spectroscope 2
Cemented surface reflexes to speculum 2, is reflected by speculum 2 and is transmitted to speculum 1 by spectroscope 1 and spectroscope 2 again, by reflection
Mirror 1 reflexes to connection mirror assembly (3), enters speculum 1 after connection mirror assembly (3) reflection, by speculum 1
Reflection, into spectroscope 1, reflect, be emitted from spectroscope 1, the outgoing of spectroscope 1 by the cemented surface of spectroscope 1 and spectroscope 2
Light and incident parallel light.
Described quartzy tube assembly (2) includes quartz ampoule (21), quartz ampoule fixedly connected part (22) and counterweight (23)；
Quartz ampoule fixedly connected part (22) is installed on one end in quartz ampoule (21), and counterweight (23) passes through connecting line and quartz
Pipe fixedly connected part (22) connects；
The both ends of quartz ampoule (21) are inserted in Amici prism component (1) and the V-groove for connecting mirror assembly (3) respectively,
The connecting line of counterweight (23) passes through the V-groove of Amici prism component (1), freely dangles by cylinder to be measured；
By the deadweight of counterweight (23), quartz ampoule (21) end face is brought into close contact with Amici prism connector A (12), prevent
Quartz ampoule (21) rotates after the completion of quartzy tube assembly (2) and connection mirror assembly (3) adjustment.
Described connection mirror assembly (3), including：Speculum connector A (31), quartzy pipe connections (32), reflection
Mirror connector B (33) and mirror assembly (34)；Connection mirror assembly (3) passes through speculum connector A (31) and cylinder (5)
Another end face of flange connection；
Mirror assembly (34), including：Reference mirror component (341), measurement mirror assembly (342) and speculum connect
Fishplate bar (343)；Speculum connecting plate (343) is detachable, before speculum connecting plate (343) is removed, reference mirror component
(341) it is connected with measurement mirror assembly (342) by speculum connecting plate (343)；Mirror assembly (342) is measured by anti-
Mirror connector B (33) is penetrated with speculum connector A (31) to be connected, after removing speculum connecting plate (343), reference mirror component
(341) it is connected by quartzy pipe connections (32) with quartz ampoule (21)；
As shown in fig. 7, reference mirror component (341) includes reference mirror (3411), reference mirror Jing Gai
And reference mirror mirror cell (3413) (3412)；
Measuring mirror assembly (342) includes measurement speculum (3421), measurement mirror lid (3422) and measures anti-
She Jing mirror cells (3423)；
As shown in Figure 8 and Figure 9, reference mirror (3411) is installed in reference mirror mirror cell (3413), measurement reflection
Mirror (3421) is installed in measurement speculum mirror cell (3423), and reference mirror Jing Gai (3412) covers reference mirror
(3411), measure mirror lid (3422) and cover measurement speculum (3421), shield；
Speculum connector is provided with V-shaped groove on (31), can patch quartz ampoule (21)；
Described V-block assembly (4) includes base (41) and baffle plate (42), and baffle plate (42) is arranged on base (41), such as
Shown in Figure 10.
V-block assembly (4) shares four, two one group, holds the flange of the both sides of cylinder to be measured (5) respectively, barrel is not
Contacted with V-block assembly (4)；Base (41) plays pivot flange, and baffle plate (42) acts the position-limiting action for blocking flange；
The distance of the V-block assembly (4) of the side flange of cylinder (5) two to be measured is held in regulation, makes cylinder horizontal.
Hardware in described connection Amici prism component (1) and connection mirror assembly (3), is material
4J32。
A kind of high-precision cylinder linear expansion coefficient measuring method, step are as follows：
(1) linear expansion coefficient of demarcation measurement quartz ampoule (21)；
(2) adjusting V-block assembly (4) makes cylinder (5) horizontal, adjustment connection Amici prism component (1), quartzy tube assembly
(2) and mirror assembly (3) relative position relation is connected, made incident by connection speculum from connection Amici prism component (1)
The signal intensity for entering interferometer after component (3) reflection is maximum；
(3) temperature control is carried out to measurement apparatus and cylinder to be measured (5), records different temperatures moment interferometer reading.
(4) according to interferometer reading Δ L, the linear expansion coefficient λ of cylinder to be measured (5) is calculatedm, step is as follows：
Quartz ampoule (21) length change amount Δ L at different temperatures moment is calculated by formula (1)c
ΔLc=λc·Lc·ΔT (1)
Measurement mirror displacements variation delta L is calculated by formula (2)m,
ΔLm=Δ L+ Δs Lc (2)
The linear expansion coefficient λ of cylinder to be measured (5) is finally calculated according to formula (3) and formula (4)m。
ΔLm=λm·Lm·ΔT (3)
Wherein：Δ L is interferometer reading, that is, measures mirror displacements variable quantity and subtract reference mirror displacement variable；
ΔLmIt is equal to length change amount of the cylinder to be measured (5) with temperature to measure mirror displacements variable quantity, in experiment；ΔLcFor reference
Mirror displacements variable quantity, length change amount of the quartz ampoule (21) with temperature is equal in experiment；λmFor cylinder to be measured (5) the swollen system of line
Number, LmFor cylinder to be measured (5) length, Δ T represents temperature variation, λcFor quartz ampoule (21) linear expansion coefficient, pass through mark before testing
It is fixed, LcThe length that light path is participated in for quartz ampoule (21) is connected between Amici prism component (1) and connection mirror assembly (3)
Length, result in-site measurement is built according to device.
The present invention compared with prior art the advantages of be：
(1) this method uses measurements by laser interferometry length change, compared to traditional measuring method such as lever amplification method, thousand
Divide table method etc. that there is the high feature of precision；
(2) this law utilizes laser interference length-measuring principle, devises including connection Amici prism component and connection speculum group
The thermal balance interference system that part is formed, makes influence of the extraneous factor to reference path and optical path equal, eliminates environmental change
Influence to measurement result, it ensure that the accuracy of test result.
(3) this method test utilize measurement of comparison, principle understands, it is simple easily implement, interferometer reading variable quantity with it is right
Both length changes of ratio are related, can significantly shorten the testing time.
(4) test fixture needed for this method and equipment are less, only need to be to connection Amici prism component and connection speculum group
The external mounting interface of part carries out adaptability change, can be applied to multiple material structural member of different shapes, it is larger reduce test into
This；
(5) our subtraction unit is built in mostly conventional bolt connected mode and light path debugging process and adjusted without precision, simply
It is easy；
Brief description of the drawings
Fig. 1 is present apparatus interference length-measuring schematic diagram；
Fig. 2 is test device figure；
Fig. 3 is connection Amici prism component drawings；
Fig. 4 is Amici prism component drawings；
Fig. 5 is quartz ampoule component drawings；
Fig. 6 is connection mirror assembly figure；
Fig. 7 is mirror assembly figure；
Fig. 8 is internal reflector component drawings；
Fig. 9 is external mirror component drawings；
Figure 10 is V-block assembly figure；
Embodiment
The present invention basic ideas be：A kind of high-precision cylinder linear expansion coefficient measurement apparatus and method, its device include
Connect Amici prism component (1), quartzy tube assembly (2), connection mirror assembly (3), V-block assembly (4).Connect Amici prism
Component (1) and connection mirror assembly (3) are installed on lower flange both ends on cylinder to be measured (5), quartzy tube assembly (2) company of being installed on
Connect in the V-groove of Amici prism component (1) and connection mirror assembly (3) and one end be with being connected Amici prism component (1) fitting,
Whole component is installed in V-block assembly (4) and is positioned in temperature control box.The linear expansion coefficient of quartz ampoule passes through in advance before measurement
Demarcation, reference member known to linear expansion coefficient during as measurement, builds and adjusts the device during measurement by interferometer, change whole
Individual assembly temperature, interferometer record the reading at different temperatures moment, finally calculate measurement result.The present apparatus and method are according to sharp
Long principle is surveyed in the interference of light, devises the device of matching measurement, eliminates influence of the environment to test result to greatest extent, and by dividing
Reference mirror in light microscopic component and mirror assembly and measurement speculum realize, during temperature change, measurement speculum and
The difference of the amount of movement of reference mirror represents the difference of the length change amount of part to be measured and reference member, also as interferometer reading.
The present invention can be not only used for measuring the linear expansion coefficient of composite cylinder structure, moreover it is possible to be changed as adaptability multiple for measuring
The linear expansion coefficient of condensation material rod member and truss structure.Measurement apparatus of the present invention has that device requirement is few, easy to use, environment
The characteristics of strong adaptability, efficiency high, high precision.
A kind of high-precision cylinder linear expansion coefficient measurement apparatus of the present invention is as shown in Figure 2：Including connection Amici prism component,
Quartzy tube assembly, connection mirror assembly, V-block assembly.The position at each position and annexation：Connect Amici prism component and
Connection mirror assembly is installed on lower flange both ends on cylinder to be measured, and quartzy tube assembly is installed on connection Amici prism component and company
Connect in the V-groove in mirror assembly and one end is installed on V-block assembly with being connected Amici prism component joint, whole component
On, it is ensured that during temperature change, cylinder and quartz ampoule energy free wxpansion to be measured.
As shown in figure 1, connection Amici prism component includes Amici prism component, Amici prism connector A and Amici prism
Connector B；The light that interferometer is sent is divided into reflected light and transmitted light after Amici prism, and two kinds of light pass through in mirror assembly
Reference mirror and measurement speculum reflection after, again pass by Amici prism, eventually pass back to laser interferometer, form interference.
Reference mirror component is connected by quartzy pipe connections and speculum connector B with quartz ampoule, and measurement mirror assembly is then straight
Connect and be connected with speculum connector A, both carry out initial position fix by speculum connecting plate, as shown in Figure 3.
Dismantled during test speculum connecting plate, change unit temp, enable reference mirror and measurement speculum with stone
The free wxpansion of English pipe and cylinder and produce displacement, the difference that interferometer have recorded both displacement variables be interferometer read
Number, measurement result can be calculated according to test data.
The present invention is further illustrated below in conjunction with the accompanying drawings.A kind of high-precision cylinder linear expansion coefficient measurement apparatus bag
Include：Connect Amici prism component (1), quartzy tube assembly (2), connection mirror assembly (3), V-block assembly (4), connection light splitting
Prism assemblies (1) and connection mirror assembly (3) are installed on lower flange both ends on cylinder to be measured (5), quartzy tube assembly (2) installation
In V-groove in connection Amici prism component (1) and connection mirror assembly (3) and one end is with being connected Amici prism component
(1) it is bonded, whole test suite is installed on V-block assembly (4).
Adjust the V-block assembly (4) at lower flange both ends on cylinder (5), make cylinder (5) anterior and posterior height consistent, during can
Monitored with horizontal bubble, V-block assembly (4) is fixed after adjustment, end face of flange installation connects Amici prism group up and down in cylinder (5)
Part (1) and connection mirror assembly (3), on Amici prism connector A (12) and speculum connector (31) with upper lower flange
Mounting hole is corresponding, adjusts cylinder (5) rolling, connection Amici prism component (1) and connection mirror assembly (3) is located at cylinder
(5) directly over, during available horizontal bubble monitor, fixed after the completion of adjustment Amici prism connector A (12) and speculum company
Fitting (31), as shown in Figure 6.
Quartzy tube assembly (2) is installed, quartz ampoule (21) is located at Amici prism connector A (12) and speculum connector
(31) in V-groove, the length of quartz ampoule (21) determines according to object length to be measured, typically longer 10~30cm than object, diameter
Matched according to Amici prism connector A (12) and the V-groove of speculum connector (31) size.One end passes through counterweight (23)
It is bonded quartzy tube assembly (2) and Amici prism connector A (12), counterweight (23) should not kick the beam, and weight is the 2 of quartz ampoule (21)
~5 times, as shown in figure 5, counterweight (23) is connected by line with quartz ampoule fixedly connected part (22), and quartz ampoule fixedly connected part
(22) it is installed on quartz ampoule (21) one end by cementing in advance and is alignd with quartz ampoule (21) end face, the other end and reference mirror
The connected quartzy pipe connections (32) of component (341) are connected, and quartzy pipe connections (32) are a circular boop structure, can be with quartz ampoule
(21) banding, while have speculum connector B (33) interface above, the rotation of quartzy pipe connections (32) is adjusted, makes reference
The speculum connector B (33) of mirror assembly (341) and the hole of quartzy pipe connections (32) are coaxial, and quartz ampoule is fixed after adjustment
Connector (32).
Speculum connecting plate (343) is removed, makes reference mirror component (341) and measurement mirror assembly (342) independent.
Measurement mirror assembly (342) is fixed on speculum connector A (31) by speculum connector B (33), reference mirror
Component (341) is fixed on quartz ampoule (21) by speculum connector B (33) and quartzy pipe connections (32).Reference mirror
Component (341) and measurement mirror assembly (342) are the structure with rotatable grip, and the rotation and translation of component can pass through
The rotation of handle and realized along the movement of handle axis.
Adjustment reference mirror component (341) and measurement mirror assembly (342) are aided in using interferometer, connects interferometer
Receive signal intensity maximum.Specially：By adjusting the speculum connector B (33) being connected with measurement mirror assembly (342)
Move up and down and the rotation around itself axle, the height of adjustment measurement mirror assembly (342) and rock, it is anti-by adjusting measurement
The rotation of She Jing mirror cells (3423) handle, the pitching of regulation measurement mirror assembly (342)；Pass through adjustment and reference mirror group
The connected speculum connector B (33) of part (341) move up and down and the rotation around itself axle, adjust reference mirror component
(341) height and rock, by adjusting the rotation of reference mirror mirror cell (3413) handle, adjust reference mirror component
(341) pitching, fixed reference mirror assembly (341) and measurement mirror assembly (342) after the completion of adjustment.
After component adjusts, three directions are carried out to it using mallet and are slightly tapped, purpose removes erection stress, avoids
Stress release is caused to influence measurement result accuracy due to temperature change in test process.After the completion of it is strong according to interferometer signal
Degree, fine-tuning measurement mirror assembly (342) and reference mirror component (341).Joined with meter ruler in-site measurement quartz ampoule (21)
Length with light path is that quartz ampoule (21) is located at Amici prism connector A (12) one end to reference mirror mirror cell (3413) handle
Distance Lc, the distance L at lower flange both ends in measurement cylinder (5)M, can repeatedly measure and average, eliminating initial error influences.
Temperature control is carried out to whole test suite, records the interferometer reading at different temperatures moment.It is true that reading balances the moment
Protect cylinder (5) axially and the circumferential temperature difference be not more than 0.5 DEG C, and the temperature change within half an hour is not more than 0.5 DEG C, environment without
Air-flow, can be circumferential in cylinder to be measured (5) and axially with the axial districution temperature measuring point of quartz ampoule (21), is for judgment means temperature
It is no to reach balance.It is center zero temperature that 20 DEG C of room temperature is typically taken during test, and interferometer is zeroed out at this temperature, test
20 ± 10 DEG C of temperature range, temperature interval is 2 DEG C~5 DEG C during reading.To ensure test result accuracy, each temperature moment is extremely
Measure less twice, each temperature moment averages for repeatedly measurement.Can be according to being treated in test result calculations arbitrary temp section
Survey the linear expansion coefficient of cylinder (5).
The length change of cylinder (5) causes to measure the movable of mirror assembly (342), and the length of quartz ampoule (21)
Change causes the movable of reference mirror component (341), and quartz ampoule (21) linear expansion coefficient is by being demarcated as known quantity, root
According to measurement apparatus and symmetrical optical path characteristic, the amount of movement before and after measurement mirror assembly (342) subtracts reference mirror
The movable amount of component (341) is then the reading of interferometer, i.e. optical path optical path difference subtracts the change of reference path optical path difference
Change amount.Can be drawn by test philosophy, when cylinder to be measured (5) and quartz ampoule (21) linear expansion coefficient substantially close to when, temperature becomes
Interferometer reading is substantially close to zero during change.When cylinder (5) to be measured is bigger than the linear expansion coefficient of quartz ampoule (21), temperature Relative Zero
For position, then interferometer reading is that just, it is negative to reduce then interferometer reading for rise.Line of the cylinder (5) to be measured than quartz ampoule (21)
Swollen coefficient hour, temperature with respect to zero-bit for, rise then interferometer reading be it is negative, reduction then interferometer reading be just.It is actual to survey
Also this principle has been confirmed during examination.
According to test process interferometer reading, by can be calculated the linear expansion coefficient in cylinder (5) arbitrary temp section
Measurement result is：
Quartz ampoule (21) length change amount Δ L at different temperatures moment is calculated by formula (1)c
ΔLc=λc·Lc·ΔT (1)
Measurement mirror displacements variation delta L is calculated by formula (2)m,
ΔLm=Δ L+ Δs Lc (2)
The linear expansion coefficient λ of cylinder to be measured (5) is finally calculated according to formula (3) and formula (4)m。
ΔLm=λm·Lm·ΔT (3)
Wherein：Δ L is interferometer reading, i.e. optical path change in optical path length amount subtracts reference path change in optical path length amount；ΔLm
For optical path change in optical path length, length change amount of the cylinder to be measured (5) with temperature is equal in experiment；ΔLcFor reference path light path
Change, length change amount of the quartz ampoule (21) with temperature is equal in experiment；λmFor cylinder to be measured (5) linear expansion coefficient, LmFor cylinder to be measured
Body (5) length, λcFor quartz ampoule (21) linear expansion coefficient, by demarcating before testing, LcThe length of light path is participated in for quartz ampoule (21),
Result in-site measurement is built according to device.Quartz ampoule (21) the length change amount at different temperatures moment is calculated by formula (3)
ΔLc, optical path length change amount Δ L is calculated by formula (1)m, cylinder to be measured finally can be calculated according to formula (4)
(5) linear expansion coefficient λm。
The inventive method has been successfully applied to the temperature linear expansion coefficient test of certain model carbon fibre composite lens barrel, essence
Degree is higher, better than 0.1 μm, is substantially dependent upon the precision frequency stabilization of laser interferometer used, the contact with traditional μm class precision is surveyed
Amount method is compared, and precision, which improves, reaches more than 10 times.This method repetition measurement quartz ampoule known to another linear expansion coefficient is used simultaneously,
Acquired results are of substantially equal with calibration value, and error is less than 5%, illustrate the accuracy of measuring method.
Interference device used in the present invention, only by spectrum groupware, mirror assembly and standard pipe composition, all parts volume weight
Amount is smaller, is easy to build adjustment.Compared with traditional measuring motion such as micrometer, standard gauge rod, contourgraph and coordinatograph,
More small light, it is stronger to place space adaptability.
The content not being described in detail in description of the invention belongs to the known technology of those skilled in the art.
Claims (7)
1. a kind of high-precision cylinder linear expansion coefficient measurement apparatus, it is characterised in that including connection Amici prism component (1), quartz
Tube assembly (2), connection mirror assembly (3), V-block assembly (4),
The both ends of cylinder (5) to be measured are provided with upper flange and lower flange,
The position at each position and annexation：Connection Amici prism component (1) and connection mirror assembly (3) are installed on cylinder to be measured
Lower flange both ends on body (5), on cylinder to be measured (5) after, connection Amici prism component (1) and connect mirror assembly
(3) two relative faces are provided with V-groove,
The both ends of quartzy tube assembly (2) are respectively arranged in the V in connection Amici prism component (1) and connection mirror assembly (3)
In type groove；
Cylinder (5) to be measured is installed in V-block assembly (4), regulation V-block assembly (4) make the central axis of cylinder (5) relative to
Ground level is horizontal, and adjustment connection Amici prism component (1), quartzy tube assembly (2) and connection mirror assembly (3) relative position are closed
System makes to be placed on connection Amici prism component (1) opposite side interferometer and receive to pass through from connection Amici prism component (1) is incident
Connect the signal intensity maximum for entering interferometer after mirror assembly (3) reflects；
The device is needed under controlled temperature conditions, and the length change amount under cylinder to be measured (5) different temperatures is recorded by interferometer, according to
Length change amount under different temperatures, finally calculate the linear expansion coefficient of cylinder to be measured (5).
A kind of 2. high-precision cylinder linear expansion coefficient measurement apparatus according to claim 1, it is characterised in that：Described company
Connecing Amici prism component (1) includes Amici prism component (11), Amici prism connector A (12) and Amici prism connector B
(13)；
Amici prism component (11) and Amici prism connector A (12) are connected with Amici prism connector B (13), Amici prism
Connector B (13) is connected with cylinder to be measured (5) end flange, and V-shaped groove is provided with Amici prism connector A (12)；
Amici prism component (11) includes polarization spectro component (111), Amici prism mirror cell (112), Amici prism left cover (113)
With Amici prism right cover (114)；
Polarization spectro component (111) is installed in Amici prism mirror cell (112), and Amici prism left cover (113) and Amici prism are right
Lid (114) covers polarization spectro component (111) together, shields；
Polarization spectro component (111), including four pieces of prisms, speculum 1, spectroscope 1, spectroscope 2, reflection are followed successively by from top to bottom
Mirror 2, spectroscope 1 and spectroscope 2 are combined into a square, and the intersection of spectroscope 1 and spectroscope 2 is spectroscope 1 and light splitting
The cemented surface of mirror 2；
Laser beam is incident from spectroscope 1, and a part of light is transmitted through connection speculum by the cemented surface of spectroscope 1 and spectroscope 2
Component (3), after connection mirror assembly (3) reflection, spectroscope 2 is incided, by the gluing of spectroscope 1 and spectroscope 2
Face reflexes to speculum 2, is reflected by speculum 2 and is transmitted to speculum 1 by spectroscope 1 and spectroscope 2 again, by speculum 1
Connection mirror assembly (3) is reflexed to, enters speculum 1 after connection mirror assembly (3) reflection, it is anti-by speculum 1
Penetrate, into spectroscope 1, reflect, be emitted from spectroscope 1, the emergent light of spectroscope 1 by the cemented surface of spectroscope 1 and spectroscope 2
With incident parallel light.
A kind of 3. high-precision cylinder linear expansion coefficient measurement apparatus according to claim 1, it is characterised in that：Described stone
English tube assembly (2) includes quartz ampoule (21), quartz ampoule fixedly connected part (22) and counterweight (23)；
Quartz ampoule fixedly connected part (22) is installed on one end in quartz ampoule (21), and counterweight (23) is consolidated by connecting line and quartz ampoule
Determine connector (22) connection；
The both ends of quartz ampoule (21) are inserted in Amici prism component (1) and the V-groove for connecting mirror assembly (3) respectively, counterweight
(23) connecting line passes through the V-groove of Amici prism component (1), freely dangles by cylinder to be measured；
By the deadweight of counterweight (23), quartz ampoule (21) end face is brought into close contact with Amici prism connector A (12), prevent quartz
Quartz ampoule (21) rotates after the completion of tube assembly (2) and connection mirror assembly (3) adjustment.
A kind of 4. high-precision cylinder linear expansion coefficient measurement apparatus according to claim 1, it is characterised in that：Described company
Mirror assembly (3) is connect, including：Speculum connector A (31), quartzy pipe connections (32), speculum connector B (33) and anti-
Penetrate mirror assembly (34)；Connection mirror assembly (3) is connected by speculum connector A (31) with cylinder (5) another end face of flange；
Mirror assembly (34), including：Reference mirror component (341), measurement mirror assembly (342) and speculum connecting plate
(343)；Speculum connecting plate (343) is detachable, before speculum connecting plate (343) is removed, reference mirror component (341)
It is connected with measurement mirror assembly (342) by speculum connecting plate (343)；Measurement mirror assembly (342) passes through speculum
Connector B (33) is connected with speculum connector A (31), after removing speculum connecting plate (343), reference mirror component
(341) it is connected by quartzy pipe connections (32) with quartz ampoule (21)；
Reference mirror component (341) includes reference mirror (3411), reference mirror Jing Gai (3412) and reference mirror
Mirror cell (3413)；
Measuring mirror assembly (342) includes measurement speculum (3421), measurement mirror lid (3422) and measurement speculum
Mirror cell (3423)；
Reference mirror (3411) is installed in reference mirror mirror cell (3413), and it is anti-that measurement speculum (3421) is installed on measurement
In She Jing mirror cells (3423), reference mirror Jing Gai (3412) covers reference mirror (3411), measures mirror lid
(3422) measurement speculum (3421) is covered, is shielded；
Speculum connector is provided with V-shaped groove on (31), can patch quartz ampoule (21).
A kind of 5. high-precision cylinder linear expansion coefficient measurement apparatus according to claim 1, it is characterised in that：Described V
Type block assembly (4) includes base (41) and baffle plate (42), and baffle plate (42) is arranged on base (41),
V-block assembly (4) shares four, two one group, holds the flange of the both sides of cylinder to be measured (5) respectively, barrel not with V-type
Block assembly (4) contacts；Base (41) plays pivot flange, and baffle plate (42) acts the position-limiting action for blocking flange；
The distance of the V-block assembly (4) of the side flange of cylinder (5) two to be measured is held in regulation, makes cylinder horizontal.
A kind of 6. high-precision cylinder linear expansion coefficient measurement apparatus according to claim 1, it is characterised in that：Described company
Connect Amici prism component (1) and connect the hardware in mirror assembly (3), be material 4J32.
7. a kind of high-precision cylinder linear expansion coefficient measuring method according to one of claim 1~6, it is characterised in that make
It is as follows with step：
(1) linear expansion coefficient of demarcation measurement quartz ampoule (21)；
(2) adjusting V-block assembly (4) makes cylinder (5) horizontal, adjustment connection Amici prism component (1), quartzy tube assembly (2) and
Mirror assembly (3) relative position relation is connected, is made incident by connection mirror assembly from connection Amici prism component (1)
(3) signal intensity for entering interferometer after reflecting is maximum；
(3) temperature control is carried out to measurement apparatus and cylinder to be measured (5), records different temperatures moment interferometer reading.
(4) according to interferometer reading Δ L, the linear expansion coefficient λ of cylinder to be measured (5) is calculatedm, step is as follows：
Quartz ampoule (21) length change amount Δ L at different temperatures moment is calculated by formula (1)c
ΔLc=λc·Lc·ΔT (1)
Measurement mirror displacements variation delta L is calculated by formula (2)m,
ΔLm=Δ L+ Δs Lc (2)
The linear expansion coefficient λ of cylinder to be measured (5) is finally calculated according to formula (3) and formula (4)m。
ΔLm=λm·Lm·ΔT (3)
Wherein：Δ L is interferometer reading, that is, measures mirror displacements variable quantity and subtract reference mirror displacement variable；ΔLmFor
Mirror displacements variable quantity is measured, length change amount of the cylinder to be measured (5) with temperature is equal in experiment；ΔLcFor reference mirror
Displacement variable, length change amount of the quartz ampoule (21) with temperature is equal in experiment；λmFor cylinder to be measured (5) linear expansion coefficient, LmFor
Cylinder (5) length to be measured, Δ T represent temperature variation, λcFor quartz ampoule (21) linear expansion coefficient, by demarcating before testing, LcFor
The length that quartz ampoule (21) participates in light path is to connect the length between Amici prism component (1) and connection mirror assembly (3), root
Result in-site measurement is built according to device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710675747.0A CN107655931B (en) | 2017-08-09 | 2017-08-09 | High-precision barrel linear expansion coefficient measuring device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710675747.0A CN107655931B (en) | 2017-08-09 | 2017-08-09 | High-precision barrel linear expansion coefficient measuring device and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107655931A true CN107655931A (en) | 2018-02-02 |
| CN107655931B CN107655931B (en) | 2020-06-09 |
Family
ID=61127803
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710675747.0A Active CN107655931B (en) | 2017-08-09 | 2017-08-09 | High-precision barrel linear expansion coefficient measuring device and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107655931B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108548839A (en) * | 2018-03-29 | 2018-09-18 | 西安空间无线电技术研究所 | A kind of high-precision parts thermal-deformation detection apparatus and test method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003166959A (en) * | 2001-12-04 | 2003-06-13 | Sumitomo Bakelite Co Ltd | Measuring method of coefficient of linear expansion, and sample-mounting chuck used for the same |
| CN104198438A (en) * | 2014-09-15 | 2014-12-10 | 清华大学 | Measuring system for expansion coefficient of material |
| CN106017333A (en) * | 2016-07-22 | 2016-10-12 | 浙江理工大学 | Phase modulation based dual-laser single-frequency interference nanometer displacement measurement device and method |
| US20170023502A1 (en) * | 2015-07-24 | 2017-01-26 | Schott Ag | High-precision method for determining thermal expansion |
-
2017
- 2017-08-09 CN CN201710675747.0A patent/CN107655931B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003166959A (en) * | 2001-12-04 | 2003-06-13 | Sumitomo Bakelite Co Ltd | Measuring method of coefficient of linear expansion, and sample-mounting chuck used for the same |
| CN104198438A (en) * | 2014-09-15 | 2014-12-10 | 清华大学 | Measuring system for expansion coefficient of material |
| US20170023502A1 (en) * | 2015-07-24 | 2017-01-26 | Schott Ag | High-precision method for determining thermal expansion |
| CN106017333A (en) * | 2016-07-22 | 2016-10-12 | 浙江理工大学 | Phase modulation based dual-laser single-frequency interference nanometer displacement measurement device and method |
Non-Patent Citations (1)
| Title |
|---|
| 任冬梅: "测量线膨胀系数的光学干涉方法", 《计量技术》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108548839A (en) * | 2018-03-29 | 2018-09-18 | 西安空间无线电技术研究所 | A kind of high-precision parts thermal-deformation detection apparatus and test method |
| CN108548839B (en) * | 2018-03-29 | 2021-08-10 | 西安空间无线电技术研究所 | High-precision part thermal deformation testing device and testing method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107655931B (en) | 2020-06-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107121095B (en) | A kind of method and device of precise measurement super-large curvature radius | |
| CN104215176B (en) | High accuracy optical interval measurement device and method | |
| CN103954589B (en) | The precision measurement apparatus of a kind of optical material specific refractory power and method | |
| CN100549615C (en) | Measure the optics of optical transparent body and the method for physical thickness | |
| CN106403990B (en) | A kind of light axis consistency caliberating device | |
| CN103454249A (en) | Method and device for detecting uniformity of optical glass based on white light interferometry | |
| CN103499496A (en) | Flexural rigidity testing device in copious cooling and high-temperature environments | |
| CN104359655A (en) | Off-axis parabolic mirror focal length detection device and method | |
| CN108955480A (en) | A kind of radius measuring device and radius measurement method | |
| CN101819017B (en) | Detecting device and method of vertex curvature radius of large-diameter non-spherical reflecting mirror | |
| Pugh et al. | Automatic gauge block measurement using multiple wavelength interferometry | |
| CN105974158A (en) | Asymmetric spatial heterodyne spectrometer wind speed measurement calibration device and asymmetric spatial heterodyne spectrometer wind speed measurement calibration method | |
| Leach | Traceable measurement of surface texture at the National Physical Laboratory using NanoSurf IV | |
| CN107655931A (en) | A kind of high-precision cylinder linear expansion coefficient measurement apparatus and method | |
| CN109631767A (en) | Range unit and distance measuring method | |
| CN102878933A (en) | Comparator based on white light interference positioning principle and detection method thereof | |
| CN106767471B (en) | Optical interval measuring system and method in aspheric surface detection light path | |
| KR20150075355A (en) | Refractive index distribution measuring method, refractive index distribution measuring apparatus, and method for manufacturing optical element | |
| CN203561562U (en) | Bending rigidity testing device | |
| CN103471834B (en) | The device of curved rigidity is accurately measured under high and low temperature environment | |
| CN204043623U (en) | Apparatus for measuring thickness of thin film | |
| CN109959342A (en) | The detection method and device of numerical aperture of objective | |
| CN103487330A (en) | Flexural rigidity testing device | |
| CN203606113U (en) | Device accurately measuring flexural rigidity in high- and low-temperature environment | |
| CN113494890B (en) | Fiber bragg grating strain sensor precision measuring device and method based on FPI interferometer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |