CN105423956A - Measurement apparatus for carbon-fiber-composite-material-based vehicle body - Google Patents
Measurement apparatus for carbon-fiber-composite-material-based vehicle body Download PDFInfo
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- CN105423956A CN105423956A CN201510864547.0A CN201510864547A CN105423956A CN 105423956 A CN105423956 A CN 105423956A CN 201510864547 A CN201510864547 A CN 201510864547A CN 105423956 A CN105423956 A CN 105423956A
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- laser
- psd sensor
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- plane
- instruments
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- 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
- G01B11/24—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures
- G01B11/245—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures using a plurality of fixed, simultaneously operating transducers
-
- 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
Abstract
The invention discloses a measurement apparatus for a carbon-fiber-composite-material-based vehicle body. The measurement apparatus comprises a work bench, four groups of identical motion sensor units, and a laser transmitting assembly. The laser transmitting assembly consists of a substrate, five lasers fixedly installed on the substrate, three support legs fixedly installed under the substrate, and ball bodies arranged at bottoms of the support legs. Axes of laser transmitted by the five lasers are located on the same plane; and the plane is parallel to a plane where a triangle formed by sphere center connecting lines of the three ball bodies is located. The four lasers are divided into two groups; axes of laser transmitted by the two lasers in each group are in a collinear mode; and the two lines formed by the two groups of lasers are parallel to each other. According to the invention, the measurement apparatus has a simple structure; the cost is low; and the requirement on the operator is low. Moreover, the measurement precision is high. And replacement of measurement on the carbon-fiber-composite-material-based vehicle body with the large size by a three-coordinate measurement machine can be realized completely.
Description
Technical field
The invention belongs to measurement mechanism technical field, be specifically related to a kind of carbon fibre composite vehicle body measurement mechanism.
Background technology
The lightweight of body of a motor car, significant for reduction automobile energy consumption.Especially, for the pure electric vehicle in new-energy automobile, when current battery performance can not show a candle to people's will, under the prerequisite ensureing vehicle body security, reduce tare, have more realistic meaning.BMW i3 has carried out taking the lead in attempting in this respect.The BMW i3 that appearance is not modest, because adopt carbon fibre composite vehicle body, conduct oneself with dignity only 1224kg.
The carbon fibre composite vehicle body of BMW i3 is combined by some Carbon-fiber Reinforced Plastics Components, produce a carbon fibre composite vehicle body, first to produce some Carbon-fiber Reinforced Plastics Components, and then all Carbon-fiber Reinforced Plastics Components are combined.And in production run, must measure Carbon-fiber Reinforced Plastics Component physical dimension and carbon fibre composite vehicle body monnolithic case size.
Conventional three coordinate measuring machine, advanced technology, powerful, measuring accuracy is high, scientific research, produce in widespread use, the measuring accuracy requirement of a lot of product design size can be met.But exist technical sophistication, expensive, manufacture and design difficulty large, to operator require high, measure the problems such as efficiency is on the low side, especially for the relatively large body of a motor car of physical dimension.
Summary of the invention
The object of the invention is to solve the problem, the carbon fibre composite vehicle body measurement mechanism providing a kind of structure simple, cheap.
The technical scheme realizing above-mentioned purpose of the present invention is: a kind of carbon fibre composite vehicle body measurement mechanism, and it is made up of a workbench, four groups of identical motion-sensing unit and Laser emission assembly.
Often organize motion-sensing unit by a linear motion unit, a grating and a PSD sensor array composition; Described linear motion unit forms by rectilinear orbit and along the slide unit that described rectilinear orbit carries out rectilinear motion; Described PSD sensor array is fixedly mounted on described slide unit, and each PSD sensor array is positioned at the PSD sensor composition of same plane by several photosurfaces.
The position relationship of described four PSD sensor arraies and described workbench meets the following conditions: when the slide unit on four linear motion units carries out rectilinear motion, and the plane and the described workbench upper surface that are fixedly mounted on the inswept formation of photosurface of four PSD sensor arraies on slide unit form four sides of a square body and the geometric relationship of bottom surface.
Described Laser emission assembly comprises a substrate, is fixedly mounted on four laser instruments of surface, is fixedly mounted on three legs below substrate and is arranged on the spheroid of each leg bottom.
The position relationship of described four laser instruments meets the following conditions: the transmit direction of described four laser instruments is all towards PSD sensor array; The laser axis that described four laser instruments are launched is positioned at same plane, and this plane is parallel to the plane at the triangle place of the centre of sphere line formation of described three spheroids; Described four laser instruments are divided into two groups, the laser axis collinear that two laser instruments often in group are launched, two line parallels that two groups of laser instruments are formed.
Described Laser emission assembly also comprises the 5th laser instrument that is fixedly mounted on surface; The position relationship of described 5th laser instrument meets the following conditions: the laser axis that described 5th laser instrument is launched is positioned at the laser axis place plane that above-mentioned four laser instruments are launched and the two bars of lines formed perpendicular to described two groups of laser instruments; The transmit direction of described 5th laser instrument is not towards PSD sensor array and towards two bars of lines that described two groups of laser instruments are formed.
The good effect that the present invention has: measurement mechanism structure of the present invention is simple, cheap, less demanding to operator, and very high measuring accuracy can be reached, the measurement of three coordinate measuring machine to the relatively large carbon fibre composite vehicle body of size can be substituted completely.
Accompanying drawing explanation
Fig. 1 is the structural representation of measurement mechanism of the present invention.
Fig. 2 is the vertical view of Fig. 1.
Embodiment
(embodiment 1)
See Fig. 1 and Fig. 2, the carbon fibre composite vehicle body measurement mechanism of the present embodiment is made up of the identical motion-sensing unit 2 of a workbench 1, four groups and Laser emission assembly.
Often organize motion-sensing unit 2 to form by a linear motion unit 21, grating 22 and a PSD sensor array 23.Linear motion unit 21 forms by rectilinear orbit 211 and along the slide unit 212 that rectilinear orbit 211 carries out rectilinear motion; Grating 22 is arranged on outside rectilinear orbit 211, for measuring the displacement of slide unit 212; PSD sensor array 23 is fixedly mounted on slide unit 212.
By several, (the present embodiment is 100 to each PSD sensor array 23, be arranged to 100 [vertical direction] × 1 [horizontal direction] arrays) the photosurface PSD sensor 231 that is positioned at same plane forms, the photosurface place plane orthogonal of all PSD sensors 231 in workbench 1 upper surface and be parallel to the linear movement direction of slide unit 212.Like this when the slide unit 212 on four linear motion units 21 carries out rectilinear motion, the plane of the inswept formation of photosurface and the upper surface of workbench 1 that are fixedly mounted on four PSD sensor arraies 23 on slide unit 212 form four sides of a square body and the geometric relationship of bottom surface.
Can determine that the photosurface of the mutual alignment relation of four gratings 22 and each PSD sensor 231 is relative to the relative position relation of slide unit 212, is designated as M thus.
Laser emission assembly comprises a substrate 3, be fixedly mounted on five laser instruments (41,42,43,44,45) above substrate 3, be fixedly mounted on three legs 5 below substrate 3 and be arranged on the spheroid 6 of each leg 5 bottom.
The transmit direction of five laser instruments (41,42,43,44,45) is all towards PSD sensor array 23.
The laser axis that five laser instruments (41,42,43,44,45) are launched is positioned at same plane, and the plane at triangle place that the centre of sphere line that this plane is parallel to three spheroids 6 is formed.
Wherein, the laser axis collinear (being designated as A line below) that laser instrument 41 and laser instrument 44 are launched, the laser axis collinear (being designated as B line below) that laser instrument 42 and laser instrument 43 are launched, A line and B line parallel.
The laser axis that 5th laser instrument 45 is launched is perpendicular to A line and B line; The transmit direction of the 5th laser instrument 45 is not towards A line and B line.
The relative position relation between the laser axis that five laser instruments (41,42,43,44,45) are launched and three spheroids 6 can be determined thus, be designated as N1.
Above-mentioned carbon fibre composite vehicle body measurement mechanism is adopted specifically to comprise the following steps the method that carbon fibre composite vehicle body is measured:
1. carbon fibre composite vehicle body 7 is placed on workbench 1, and is positioned at four groups of identical motion-sensing unit 2, three of Laser emission assembly spheroids 6 are realized three point contact a certain position (being designated as A place) and the surface of carbon fibre composite vehicle body 7.
2. first laser instrument 41 is opened (all the other four laser instruments are in closed condition), and drive four slide units 212 to drive four PSD sensor arraies 23 to carry out rectilinear motion by respective initial point simultaneously.
After certain the PSD sensor 231 in certain PSD sensor array 23 senses laser, stop motion, measures this laser induced point (being designated as Z1) position in this PSD sensor 231, is designated as M41, the locus of Z1 can be obtained by M41 and above-mentioned M, be designated as M11.Then four slide units 212 are made to return respective initial point.
Laser instrument 41 is closed, and laser instrument 42 is opened, and repeats said process, obtains the locus M12 of the laser induced some Z2 of laser on certain PSD sensor 231 that laser instrument 42 is launched.
Laser instrument 42 is closed, and laser instrument 43 is opened, and repeats said process, obtains the locus M13 of the laser induced some Z3 of laser on certain PSD sensor 231 that laser instrument 43 is launched.
Laser instrument 43 is closed, and laser instrument 44 is opened, and repeats said process, obtains the locus M14 of the laser induced some Z4 of laser on certain PSD sensor 231 that laser instrument 44 is launched.
Laser instrument 44 is closed, and laser instrument 45 is opened, and repeats said process, obtains the locus M15 of the laser induced some Z5 of laser on certain PSD sensor 231 that laser instrument 45 is launched.
The locus M1 of the laser axis that five laser instruments (41,42,43,44,45) are launched can be obtained by M11 ~ M15, then in conjunction with above-mentioned N1, the locus X1 of three bulbs 6 in A place can be obtained.
3. three of Laser emission assembly spheroids 6 are realized three point contact another location (being designated as B place) and the surface of carbon fibre composite vehicle body 7; Repeat step 2., thus calculate the locus X2 of three bulbs 6 in B place.
4. repeat step 3., obtain the locus X3 of three bulbs 6 in some places, X4 ..., Xn.
By X1, X2 ..., Xn can obtain the physical dimension data of carbon fibre composite vehicle body 7.
The actual three coordinate measuring machine being equal to an employing bulb gauge head of above-mentioned measuring method is measured carbon fibre composite vehicle body 7 surface, calculate the sphere centre coordinate of the bulb gauge head of several and carbon fibre composite vehicle body 7 plane tangent, thus obtain carbon fibre composite vehicle body 7 physical dimension data.
Claims (1)
1. a carbon fibre composite vehicle body measurement mechanism, is characterized in that: be made up of a workbench (1), four groups of identical motion-sensing unit (2) and Laser emission assembly;
Often organize motion-sensing unit (2) by a linear motion unit (21), a grating (22) and PSD sensor array (23) composition; Described linear motion unit (21) forms by rectilinear orbit (211) and along the slide unit (212) that described rectilinear orbit (211) carries out rectilinear motion; Described PSD sensor array (23) is fixedly mounted on described slide unit (212), and each PSD sensor array (23) is positioned at PSD sensor (231) composition of same plane by several photosurfaces;
Described four PSD sensor arraies (23) meet the following conditions with the position relationship of described workbench (1): when the slide unit (212) on four linear motion units (21) carries out rectilinear motion, the plane and described workbench (1) upper surface that are fixedly mounted on the inswept formation of photosurface of four PSD sensor arraies (23) on slide unit (212) form four sides of a square body and the geometric relationship of bottom surface;
Described Laser emission assembly comprises a substrate (3), is fixedly mounted on four laser instruments (41,42,43,44) of substrate (3) top, is fixedly mounted on three legs (5) of substrate (3) below and is arranged on the spheroid (6) of each leg (5) bottom;
The position relationship of described four laser instruments (41,42,43,44) meets the following conditions: the transmit direction of described four laser instruments (41,42,43,44) is all towards PSD sensor array (23); The laser axis that described four laser instruments (41,42,43,44) are launched is positioned at same plane, and this plane is parallel to the plane at the triangle place of the centre of sphere line formation of described three spheroids (6); Described four laser instruments (41,42,43,44) are divided into two groups, the laser axis collinear that two laser instruments often in group are launched, two line parallels that two groups of laser instruments are formed;
Described Laser emission assembly also comprises the 5th laser instrument (45) that is fixedly mounted on substrate (3) top; The position relationship of described 5th laser instrument (45) meets the following conditions: the laser axis that described 5th laser instrument (45) is launched is positioned at the laser axis place plane that above-mentioned four laser instruments (41,42,43,44) are launched and the two bars of lines formed perpendicular to described two groups of laser instruments; The transmit direction of described 5th laser instrument (45) is not towards PSD sensor array (2) and towards two bars of lines that described two groups of laser instruments are formed.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510864547.0A CN105423956B (en) | 2015-11-30 | 2015-11-30 | A kind of carbon fibre composite vehicle body measurement apparatus |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510864547.0A CN105423956B (en) | 2015-11-30 | 2015-11-30 | A kind of carbon fibre composite vehicle body measurement apparatus |
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| CN105423956A true CN105423956A (en) | 2016-03-23 |
| CN105423956B CN105423956B (en) | 2017-11-21 |
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| CN201510864547.0A Active CN105423956B (en) | 2015-11-30 | 2015-11-30 | A kind of carbon fibre composite vehicle body measurement apparatus |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107063104A (en) * | 2017-04-01 | 2017-08-18 | 清华大学 | Planar motor rotor position measuring system and method based on grating scale and Two-dimensional PSD |
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| CN1645042A (en) * | 2005-01-12 | 2005-07-27 | 天津大学 | Laser three-dimensional color scanning digital method and digital equipment |
| US20070046663A1 (en) * | 2005-08-24 | 2007-03-01 | Hartmut Brinkmann | Method of determining the shape of a dental technology object and apparatus for per-forming the method |
| CN201622065U (en) * | 2009-12-09 | 2010-11-03 | 麻伟明 | Automatic dynamic overall dimension measuring device for vehicles |
| CN201909614U (en) * | 2010-12-28 | 2011-07-27 | 苏州弗士达科学仪器有限公司 | Rotating platform structure for automatic optical measuring instruments |
| CN102144144A (en) * | 2008-09-02 | 2011-08-03 | 杜尔装备产品有限公司 | Device and method for determining and setting the chassis geometry of a vehicle |
| CN104848785A (en) * | 2014-09-05 | 2015-08-19 | 北汽福田汽车股份有限公司 | Whole-automobile parameter test system |
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2015
- 2015-11-30 CN CN201510864547.0A patent/CN105423956B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1645042A (en) * | 2005-01-12 | 2005-07-27 | 天津大学 | Laser three-dimensional color scanning digital method and digital equipment |
| US20070046663A1 (en) * | 2005-08-24 | 2007-03-01 | Hartmut Brinkmann | Method of determining the shape of a dental technology object and apparatus for per-forming the method |
| CN102144144A (en) * | 2008-09-02 | 2011-08-03 | 杜尔装备产品有限公司 | Device and method for determining and setting the chassis geometry of a vehicle |
| CN201622065U (en) * | 2009-12-09 | 2010-11-03 | 麻伟明 | Automatic dynamic overall dimension measuring device for vehicles |
| CN201909614U (en) * | 2010-12-28 | 2011-07-27 | 苏州弗士达科学仪器有限公司 | Rotating platform structure for automatic optical measuring instruments |
| CN104848785A (en) * | 2014-09-05 | 2015-08-19 | 北汽福田汽车股份有限公司 | Whole-automobile parameter test system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107063104A (en) * | 2017-04-01 | 2017-08-18 | 清华大学 | Planar motor rotor position measuring system and method based on grating scale and Two-dimensional PSD |
| CN107063104B (en) * | 2017-04-01 | 2019-06-18 | 清华大学 | Planar motor rotor position measuring system and method based on grating scale and Two-dimensional PSD |
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| CN105423956B (en) | 2017-11-21 |
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