CN102506741A - Three-dimensional deformation measuring device for measured piece in high-temperature and low-temperature box - Google Patents
Three-dimensional deformation measuring device for measured piece in high-temperature and low-temperature box Download PDFInfo
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- CN102506741A CN102506741A CN2011103702534A CN201110370253A CN102506741A CN 102506741 A CN102506741 A CN 102506741A CN 2011103702534 A CN2011103702534 A CN 2011103702534A CN 201110370253 A CN201110370253 A CN 201110370253A CN 102506741 A CN102506741 A CN 102506741A
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Abstract
The invention relates to a three-dimensional deformation measuring device for a measured piece in a high-temperature and low-temperature box. The measuring device comprises a string, a three-dimensional air floating assembly and signal acquisition modules with encoders in three directions. Each air floating unit comprises an air floating shaft and an air floating sleeve. The signal acquisition modules with the encoders in the three directions are respectively installed on an x-direction air floating unit, a y-direction air floating unit and a z-direction air floating unit. An x-direction air floating shaft is installed on a fixed plate. An x-direction air floating sleeve is slideably installed on the x-direction air floating shaft. The x-direction air floating sleeve is fixedly connected with a y-direction air floating shaft. A y-direction air floating sleeve is slideably installed on the y-direction air floating shaft. The y-direction air floating sleeve is fixedly connected with a z-direction air floating sleeve. A z-direction air floating shaft is slideably installed on the z-direction air floating sleeve. The upper end of the string is connected with the measured piece and the lower end of the string is connected with the z-direction air floating shaft of the three-dimensional air floating assembly. The three-dimensional deformation measuring device for the measured piece in the high-temperature and low-temperature box provided by the invention has the advantage of high measurement precision.
Description
Technical field
The present invention relates to a kind of measuring system of three-dimensional microdeformation, the measurement mechanism of the three-dimensional deformation of measured piece in especially a kind of high-low temperature chamber.
Background technology
Need apply acting force to the measured piece direction when bending the rigidity stiffness test, under power or torsional interaction, measured piece produces distortion, comes calculated rigidity through the distortion of measuring force direction.But the measured piece out-of-shape except generation is used for the distortion of Rigidity Calculation direction, also may produce x, y, the rotation of three directions of z and the distortion of all the other both directions under external force.Even acting force or moment do not change, but because the distortion of measured point causes the variation of the arm of force, thereby have influence on the moment values of loading.Because the deflection of measured piece itself is very little; The microdeformation meeting of other direction of stressed back exerts an influence to the stiffness test result; Have only and high-accuracy high-resolution is carried out in three directions distortion simultaneously measure; Obtain the deflection that is used for the required direction of Rigidity Calculation through the follow-up data processing, just can obtain stiffness measurement result accurately.
Because measured piece is in one directly in the high-low temperature chamber body of sensor installation, therefore at first wants measured piece to move and transfers to outside the high-low temperature chamber.
Summary of the invention
In order to overcome the relatively poor deficiency of measuring accuracy of the measurement mechanism of the three-dimensional deformation of measured piece in the existing high-low temperature chamber, the present invention provides the 3 D deformation measurement mechanism of measured piece in the higher high-low temperature chamber of a kind of measuring accuracy.
The technical solution adopted for the present invention to solve the technical problems is:
The 3 D deformation measurement mechanism of measured piece in a kind of high-low temperature chamber; Said measurement mechanism comprises the signal acquisition module of the band scrambler of cord, three-dimensional air floating assembly and three directions; Said three-dimensional air floating assembly comprise fixed head, x to air flotation cell, y to air flotation cell and z to air flotation cell; Each air flotation cell includes the gentle empty boasting of air-bearing shafts, the signal acquisition module of the band scrambler of said three directions be installed in respectively x to air flotation cell, y to air flotation cell and z on air flotation cell; Said x is installed on the fixed head to air-bearing shafts; X is slidably mounted in x on air-bearing shafts to the air supporting cover; Said x is fixedly connected to air-bearing shafts with y to the air supporting cover; Y is slidably mounted in y on air-bearing shafts to the air supporting cover, and said y is fixedly connected to the air supporting cover with z to the air supporting cover, and said z is slidably mounted in said z to air-bearing shafts and puts to air supporting;
The upper end of said cord is connected with measured piece, and the lower end of said cord is connected to air-bearing shafts with the z of said three-dimensional air floating assembly.
Further; The signal acquisition module of said band scrambler comprises grating chi, grating signal collection conversion equipment and signal receiver; Said grating chi is positioned at the collection visual range that said grating signal is gathered conversion equipment, said grating signal gather conversion equipment and said signal receiver over against.
Further again; Said x is fixedly connected to air supporting cover web joint with x to the air supporting cover; Said x is connected to installing plate with y to air supporting cover web joint, and said y is installed in said y on installing plate to air-bearing shafts, and said y is fixedly connected to air supporting cover web joint with y to the air supporting cover; Said y is connected to fixed dam with z to air supporting cover web joint; Said z is installed in said z on fixed dam to the air supporting cover, and said z is fixedly connected to the air-bearing shafts web joint with z to air-bearing shafts, and said z installs the connector that is connected with cord to the upper end of air-bearing shafts;
Z is installed in z on grating chi fixed head to the grating chi; Z is installed on the said air-bearing shafts web joint to grating chi fixed head; Z gathers conversion equipment to grating signal and is installed on the said air-bearing shafts web joint, and z is installed in the three-dimensional air floating assembly outer over against the place of z to grating signal collection conversion equipment to signal receiver; X is installed in x to the grating chi and puts to air supporting, and x gathers conversion equipment to grating signal and is installed in x on air supporting cover web joint, and x is installed in the three-dimensional air floating assembly outer over against the place of x to grating signal collection conversion equipment to signal receiver; Y is installed in y respectively to the grating chi and puts to air supporting, and y gathers conversion equipment to grating signal and is installed in y and puts to air supporting, and y is installed in the three-dimensional air floating assembly outer over against the place of y to grating signal collection conversion equipment to signal receiver.
Further, each air flotation cell includes two air-bearing shafts and two air supporting covers, and said two air-bearing shafts laterally arrange.
Technical conceive of the present invention is: connect measured piece through cord, the cord little mass of suspension down guarantees rope straight down.Because rope is stressed to remain unchanged, therefore think that rope length does not change in whole process.Utilize the air supporting assembly to connect the rope mass of suspension down, let little mass not have and frictionally follow the measured piece motion, obtain the small movements track of measured piece through the movement locus of measuring little mass in x, y and three directions of z.
Patent " combined air flotation device of unaffected by disturbance of air pipes " (application number 201010165949.9; Authorize) use air flotation technology and have characteristics such as frictional resistance is little, kinematic accuracy is high, cleanliness without any pollution, a kind of added influence of effectively avoiding friction force is provided, has adapted to the three-dimensional air-floation follow-up device of high precision occasion.The present invention changes the air supporting modular construction on the basis of this patent, overcomes to make it adapt to current measurement requirement.
Beneficial effect of the present invention mainly shows: connect measured piece through cord; Movement locus after replacing measured piece stressed with the movement locus that is suspended on the little mass on the cord; Designed one and overlapped the system that is applicable to measured piece stiffness measurement under the high and low temperature environment; Effectively overcome the influence of additional friction power and components and parts additional movements in the measuring process, realized high-acruracy survey.
Description of drawings
Fig. 1 is the front view of three-dimensional air floating assembly.
Fig. 2 is the left view of three-dimensional air floating assembly.
Fig. 3 is the axis side view of three-dimensional air floating assembly.
Fig. 4 is signal acquisition module communication figure.
Embodiment
Below in conjunction with accompanying drawing the present invention is further described.
With reference to Fig. 1～Fig. 3; The 3 D deformation measurement mechanism of measured piece in a kind of high-low temperature chamber; Said measurement mechanism comprises the signal acquisition module of the band scrambler of cord, three-dimensional air floating assembly and three directions; Said three-dimensional air floating assembly comprise fixed head 19, x to air flotation cell, y to air flotation cell and z to air flotation cell; Each air flotation cell includes the gentle empty boasting of air-bearing shafts, the signal acquisition module of the band scrambler of said three directions be installed in respectively x to air flotation cell, y to air flotation cell and z on air flotation cell; X is installed on the fixed head 19 to air-bearing shafts 20; X is slidably mounted in x on air-bearing shafts 20 to air supporting cover 25; Said x is fixedly connected to air-bearing shafts 8 with y to air supporting cover 25; Y is slidably mounted in y on air-bearing shafts 8 to air supporting cover 13, and said y is fixedly connected to air supporting cover 1,4 with z to air supporting cover 13, and said z is slidably mounted in said z on air supporting cover 1,4 to air-bearing shafts 16,3;
The upper end of said cord is connected with measured piece, and the lower end of said cord is connected to air-bearing shafts 16,3 with the z of said three-dimensional air floating assembly.
The signal acquisition module of said band scrambler comprises grating chi, grating signal collection conversion equipment and signal receiver; Said grating chi is positioned at the collection visual range that said grating signal is gathered conversion equipment, said grating signal gather conversion equipment and said signal receiver over against.
Said x is fixedlyed connected to air supporting cover connecting plate 9 with x to the air supporting cover; Said x is connected to installing plate 10 with y to air supporting cover connecting plate 9; Said y is installed in said y on installing plate 10 to air-bearing shafts 8; Said y is fixedlyed connected to air supporting cover connecting plate 24 with y to air supporting cover 13, and said y is connected to fixed dam 5 with z to air supporting cover fixed head 22 by Z to air supporting cover connecting plate 24, and said z is installed in said z on fixed dam 5 to air supporting cover 1,4; Said z is fixedlyed connected to air-bearing shafts connecting plate 7 with z to air-bearing shafts 16,3, and said z installs the connector 2 that is connected with cord to the upper end of air-bearing shafts;
Z is installed in z on grating chi fixed head 6 to grating chi 21; Z is installed on the said air-bearing shafts web joint 7 to grating chi fixed head 6; Z to grating signal gather conversion equipment 23 be installed in said air-bearing shafts web joint 7 on, z is installed in the three-dimensional air floating assembly outer over against the place of z to grating signal collection conversion equipment to signal receiver 18; X is installed in x respectively on air supporting cover 25 to grating chi 26, and x gathers conversion equipment 11 to grating signal and is installed in X on air supporting cover web joint 9, and x is installed in the three-dimensional air floating assembly outer over against the place of x to grating signal collection conversion equipment to signal receiver 17; Y is installed in y respectively on air supporting cover 13 to grating chi 15, and y gathers conversion equipment 14 to grating signal and is installed in y on air supporting cover 13, and y is installed in the three-dimensional air floating assembly outer over against the place of y to grating signal collection conversion equipment to signal receiver 12.
Each air flotation cell includes two air-bearing shafts and two air supporting covers, and said two air-bearing shafts laterally arrange.
In the present embodiment; The three-dimensional air floating assembly from the bottom up three layers correspond respectively to x, y and three directions of z; Wherein cord links to each other with measured piece; The little mass of suspension below the cord, the length of rope designs according to the error range of measuring, and the offset deviation that guarantees measurand and little mass is in required measuring accuracy scope; The air supporting assembly of three directions includes the gentle empty boasting of air-bearing shafts, and x, y direction air-bearing shafts are motionless relatively, the motion of air supporting cover, and the motion of z direction air-bearing shafts, the air supporting cover is motionless; The air-bearing shafts of x direction is fixed on the frame; The air supporting cover of the air-bearing shafts of y direction and x direction is connected through mount pad, installing plate; The air supporting cover of z direction is connected to the air supporting cover of air supporting cover fixed head and y direction through z; Z to air-bearing shafts link to each other with cord through a connector, z to air-bearing shafts played the effect of little mass.
X, y, three directions of z are respectively equipped with two air-bearing shafts and two air supporting covers, and unidirectional air-bearing shafts (cover) is fixed on the same fixed head, has effectively overcome the influence that little mass is twisted by the external force effect.Air supporting assembly air-breather structure can effectively avoid snorkel to produce additional disturbance to measuring with reference to same patent " combined air flotation device of unaffected by disturbance of air pipes " (application number 201010165949.9 is authorized).
In the routine measurement, generally adopt the contactless optical photoelectric coder to measure the displacement variable of measured piece.The contactless optical photoelectric coder is made up of read head and grating chi read head.The grating chi need not power supply does not have the lead connection yet, and read head must transfer out measuring-signal by the power supply power supply and through lead, and read head and grating chi must guarantee relative motion under desired spacing, thereby obtain displacement signal.Be specially, the read head of z direction is installed in air supporting and puts, and the grating chi is installed on the air-bearing shafts (little mass), and the air supporting cover is motionless relatively during the motion of z direction, the air-bearing shafts motion.The read head of y direction is installed on the air-bearing shafts of y direction, and the air supporting that the grating chi is contained in the y direction puts, y direction read head external wire, and during the motion of y direction, the motion of air supporting cover, air-bearing shafts and lead do not move relatively.The read head of x direction is installed on the air-bearing shafts of x direction, and the air supporting that the grating chi is contained in the x direction puts, x direction read head external wire, and during the motion of x direction, the motion of air supporting cover, air-bearing shafts and lead do not move relatively.
But; Because measuring-signal is through the lead transmission, the measured point is moved and is caused accompany movement of lead, and the other end is because of being fixed on the testing tool; Therefore lead can bring the influence of additional force to the motion of tested little mass around moving, thereby changes the position of little mass and produce measuring error.Be specially: except that the x direction because the external relative frame of lead of read head do not have the motion since y to air-bearing shafts and x to the air supporting cover be connected, when little mass along x when moving, be installed in y to the lead of the y on the air-bearing shafts on read head with relative gantry motion.In like manner because z is connected to the air supporting cover with y to air supporting cover, when x to y during to motion, be installed in z that z puts to air supporting to the lead of read head can relative frame and y move to air-bearing shafts.The additional movement meeting of y, z direction read head external wire brings interference to measurement, produces measuring error.
In order to solve the additional disturbance of lead; Improve measuring accuracy; The present invention has designed the SCM system with powered battery, band coded signal collection and infrared transmission on x, y and z axle place layer, specifically comprise: grating chi, grating signal are gathered conversion equipment and signal receiver.Wherein, Z is installed in z on grating chi fixed head to the grating chi; Z to grating chi fixed head be installed in z on the air-bearing shafts web joint of air-bearing shafts interlock; Z gathers conversion equipment to grating signal and is installed in z on fixed dam, and z is installed in the three-dimensional air floating assembly outer over against the place of z to grating signal collection conversion equipment to signal receiver; X, y are installed in corresponding air supporting to the grating chi and put, and grating signal is gathered conversion equipment and is installed on the respective direction installing plate, and signal receiver is installed conversion equipment is gathered in three-dimensional air floating assembly outside over against the respective direction grating signal place.
Its course of work is: the scrambler acquired signal on x, y, the z axle; Main frame sends data transfer instruction to x axle, y axle and z axle simultaneously; To gather conversion equipment by grating signal be that infrared signal sends to signal receiver with the transformation of data of current collection receiving instruction back for x axle, y axle and z axle; Pass host computer again back, thereby the data that guarantee x axle, y axle and z axle remain synchronously, avoid three axis data to misplace in time and the additional disturbance of lead.
Distortion after the present invention replaces measured piece stressed with the displacement of little mass (z is to air-bearing shafts), when measured piece received external force effect generation microdeformation, micro-displacement can take place in little mass accordingly, and this micro-displacement is delivered in the three-dimensional air floating assembly.During measurement; The micro-displacement that occurs in the z direction is directly delivered to z on air-bearing shafts through little mass; To air supporting cover motion, z gathers conversion equipment to grating signal and changes the shift value of current collection into infrared signal and send to z to signal receiver z, passes host computer again back to the relative z of air-bearing shafts.In like manner; Occur in x, y to micro-displacement be directly delivered at x, y through little mass and put to air supporting; Relative air-float guide rail motion is overlapped in air supporting; Respective direction grating signal collection conversion equipment changes the shift value of current collection into signal receiver that infrared signal sends to correspondence, passes host computer again back, thereby realizes the function of measurement of x, y, three direction microdeformations of z.
Available other wireless communication modes of infrared signal transmission device in the invention replace.
Claims (4)
1. the 3 D deformation measurement mechanism of measured piece in the high-low temperature chamber; It is characterized in that: said measurement mechanism comprises the signal acquisition module of the band scrambler of cord, three-dimensional air floating assembly and three directions; Said three-dimensional air floating assembly comprise fixed head, x to air flotation cell, y to air flotation cell and z to air flotation cell; Each air flotation cell includes the gentle empty boasting of air-bearing shafts, the signal acquisition module of the band scrambler of said three directions be installed in respectively x to air flotation cell, y to air flotation cell and z on air flotation cell; X is installed on the fixed head to air-bearing shafts; X is slidably mounted in x on air-bearing shafts to the air supporting cover; Said x is fixedly connected to air-bearing shafts with y to the air supporting cover; Y is slidably mounted in y on air-bearing shafts to the air supporting cover, and said y is fixedly connected to the air supporting cover with z to the air supporting cover, and said z is slidably mounted in said z to air-bearing shafts and puts to air supporting;
The upper end of said cord is connected with measured piece, and the lower end of said cord is connected to air-bearing shafts with the z of said three-dimensional air floating assembly.
2. the 3 D deformation measurement mechanism of measured piece in the high-low temperature chamber as claimed in claim 1; It is characterized in that: the signal acquisition module of said band scrambler comprises grating chi, grating signal collection conversion equipment and signal receiver; Said grating chi is positioned at the collection visual range that said grating signal is gathered conversion equipment, said grating signal gather conversion equipment and said signal receiver over against.
3. the 3 D deformation measurement mechanism of measured piece in the high-low temperature chamber as claimed in claim 2; It is characterized in that: said x is fixedlyed connected to air supporting cover connecting plate with x to the air supporting cover; Said x is connected to installing plate with y to air supporting cover connecting plate, and said y is installed in said y on installing plate to air-bearing shafts, and said y is fixedlyed connected to air supporting cover connecting plate with y to the air supporting cover; Said y is connected to fixed dam with z to air supporting cover connecting plate; Said z is installed in said z on fixed dam to the air supporting cover, and said z is fixedlyed connected to the air-bearing shafts connecting plate with z to air-bearing shafts, and said z installs the connector that is connected with cord to the upper end of air-bearing shafts;
Z is installed in z on grating chi fixed head to the grating chi; Z to grating chi fixed head be installed in said z on the air-bearing shafts web joint; Z to grating signal gather conversion equipment be installed in said z on the air-bearing shafts web joint, z is installed in the three-dimensional air floating assembly outer over against the place of z to grating signal collection conversion equipment to signal receiver; X is installed in x to the grating chi and puts to air supporting, and x gathers conversion equipment to grating signal and is installed in x on air supporting cover web joint, and x is installed in the three-dimensional air floating assembly outer over against the place of x to grating signal collection conversion equipment to signal receiver; Y is installed in y respectively to the grating chi and puts to air supporting, and y gathers conversion equipment to grating signal and is installed in y and puts to air supporting, and y is installed in the three-dimensional air floating assembly outer over against the place of y to grating signal collection conversion equipment to signal receiver.
4. like the 3 D deformation measurement mechanism of measured piece in the described high-low temperature chamber of one of claim 1～3, it is characterized in that: each air flotation cell includes two air-bearing shafts and two air supporting covers, and said two air-bearing shafts laterally arrange.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110370253 CN102506741B (en) | 2011-11-18 | 2011-11-18 | Three-dimensional deformation measuring device for measured piece in high-temperature and low-temperature box |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110370253 CN102506741B (en) | 2011-11-18 | 2011-11-18 | Three-dimensional deformation measuring device for measured piece in high-temperature and low-temperature box |
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| CN102506741A true CN102506741A (en) | 2012-06-20 |
| CN102506741B CN102506741B (en) | 2013-12-18 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103063392A (en) * | 2012-12-31 | 2013-04-24 | 浙江工业大学 | Ultra-low frequency modal test gravitational equilibrium system |
| CN103499496A (en) * | 2013-09-18 | 2014-01-08 | 浙江工业大学 | Flexural rigidity testing device in copious cooling and high-temperature environments |
| CN103543075A (en) * | 2013-09-18 | 2014-01-29 | 浙江工商大学 | Method and device for testing flexural rigidity under high and low temperature environment |
| CN108195297A (en) * | 2017-12-13 | 2018-06-22 | 太原航空仪表有限公司 | A kind of micro component high/low temperature deformation measuring device |
| CN109341506A (en) * | 2018-11-16 | 2019-02-15 | 武汉理工大学 | Three direction displacement measuring device |
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| JP2009280977A (en) * | 2008-05-20 | 2009-12-03 | Railway Technical Res Inst | Apparatus for applying three-dimensional loading to eccentric structure by change of response-displacement direction |
| CN101839280A (en) * | 2010-05-07 | 2010-09-22 | 浙江工业大学 | Combined air flotation device unaffected by disturbance of air pipes |
| CN202350751U (en) * | 2011-11-18 | 2012-07-25 | 浙江工业大学 | Three-dimensional deformation measuring device of measured piece in high-low temperature box |
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| CN1696628A (en) * | 2004-05-14 | 2005-11-16 | 盛德恩 | New type device for measuring mass and position of center of mass, and measuring method |
| CN1963442A (en) * | 2006-11-03 | 2007-05-16 | 厦门大学 | In-situ measuring apparatus for high temperature distortion ceramic fiber |
| JP2009280977A (en) * | 2008-05-20 | 2009-12-03 | Railway Technical Res Inst | Apparatus for applying three-dimensional loading to eccentric structure by change of response-displacement direction |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103063392A (en) * | 2012-12-31 | 2013-04-24 | 浙江工业大学 | Ultra-low frequency modal test gravitational equilibrium system |
| CN103063392B (en) * | 2012-12-31 | 2015-03-25 | 浙江工业大学 | Ultra-low frequency modal test gravitational equilibrium system |
| CN103499496A (en) * | 2013-09-18 | 2014-01-08 | 浙江工业大学 | Flexural rigidity testing device in copious cooling and high-temperature environments |
| CN103543075A (en) * | 2013-09-18 | 2014-01-29 | 浙江工商大学 | Method and device for testing flexural rigidity under high and low temperature environment |
| CN103543075B (en) * | 2013-09-18 | 2016-03-09 | 浙江工商大学 | Bendind rigidity method of testing and device under high and low temperature environment |
| CN108195297A (en) * | 2017-12-13 | 2018-06-22 | 太原航空仪表有限公司 | A kind of micro component high/low temperature deformation measuring device |
| CN109341506A (en) * | 2018-11-16 | 2019-02-15 | 武汉理工大学 | Three direction displacement measuring device |
| CN109341506B (en) * | 2018-11-16 | 2020-01-14 | 武汉理工大学 | Three-dimensional displacement measuring device |
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Effective date of registration: 20171211 Address after: 313000 Zhejiang Province, Huzhou city Wuxing District Road No. 1188 district headquarters free port B building 14 Building 1403 room Patentee after: Zhejiang creation Intellectual Property Service Co., Ltd. Address before: Hangzhou City, Zhejiang province 310014 City Zhaohui District Six Patentee before: Zhejiang University of Technology |
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Effective date of registration: 20191115 Address after: 215100 1 Wuzhong Road, Yuexi street, Wuzhong Economic Development Zone, Suzhou, Jiangsu, China, 1368 Patentee after: Suzhou Wei you Intellectual Property Operation Co., Ltd. Address before: 313000 Room 1403, 14th Floor, Building B, Freeport, Headquarters 1188 District Fulu Road, Wuxing District, Huzhou City, Zhejiang Province Patentee before: Zhejiang creation Intellectual Property Service Co., Ltd. |