CN108362439B - A kind of standardized centroid exemplar centroid position two-dimentional measuring device and measurement method - Google Patents
A kind of standardized centroid exemplar centroid position two-dimentional measuring device and measurement method Download PDFInfo
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- CN108362439B CN108362439B CN201711101470.7A CN201711101470A CN108362439B CN 108362439 B CN108362439 B CN 108362439B CN 201711101470 A CN201711101470 A CN 201711101470A CN 108362439 B CN108362439 B CN 108362439B
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Abstract
The invention belongs to centroid measurement technology, it is related to a kind of standardized centroid exemplar centroid position two-dimentional measuring device and measurement method.Measuring device of the invention includes girder (1), 4 column (2), 4 sensors (3), 4 trim counterweight components (4), 2 V-blocks (5), 4 day pingbian knives (6), 4 fulcrum pivots (7) for holding elevating mechanism with knife, and 4 fulcrum pivot boxes (10), 4 fulcrum pivots hold (11) and leveling base (9).Measuring process of the invention is: establishing three-dimensional system of coordinate；Load；X-direction load measurement；Calculate coordinate Δ L of the mass center in X-direction of standardized centroid exemplar1；Y-direction load measurement；Calculate the coordinate Δ L of the mass center of standardized centroid exemplar in the Y direction2；Z-direction load measurement；Calculate coordinate Δ L of the mass center in Z-direction of standardized centroid exemplar3.The present invention is not necessarily to dismantle weighing sensor or load cell in periodic calibration, avoids because disassembling operations cause its position that can change；The contact surface for improving weighing sensor or load cell facilitates the position for determining its practical supporting point, improves accuracy of measurement.
Description
Technical field
The invention belongs to centroid measurement technology, it is related to a kind of standardized centroid exemplar centroid position two-dimentional measuring device and measurement
Method.
Background technique
The measurement of mass center is ubiquitous, such as the mass centers parameter such as aviation field advanced aircraft, airborne missile, engine
Accurate measurement directly influences aspect after the gesture stability of aircraft, the hit rate of MISSILE LAUNCHING and transmitting, engine
Vibration etc..The country's higher centroid measurement equipment of measurement accuracy is mostly based on multi-point support method at present, and the calibration method of use is more
It traces to the source for a point parameter, wherein weighing sensor or force snesor pass through inspection after disassembly；The dimensional measurement part of measuring device
Field calibration is carried out by using dimensional measurement instrument.Such point of parameter is traced to the source insufficient in the presence of several points: first, weighing sensor
Or load cell needs to dismantle in periodic calibration, reinstalls after periodic calibration, causes its position that can change；
Secondly, the contact surface of weighing sensor or load cell is spherical surface, and the position of practical supporting point is difficult to determine, limits it
Accuracy of measurement.
Summary of the invention
The purpose of the present invention is: propose a kind of standardized centroid exemplar centroid position two-dimentional measuring device and measurement method, nothing
Weighing sensor or load cell need to be dismantled in periodic calibration, avoid causing its position that can change because of disassembling operations；
The contact surface for improving weighing sensor or load cell facilitates the position for determining its practical supporting point, improves accuracy of measurement.
The technical scheme is that a kind of standardized centroid exemplar centroid position two-dimentional measuring device, it is characterised in that: it
2,4, the column V-block 5,4 of trim counterweight component 4,2 of sensor 3,4 of elevating mechanism is held with knife including girder 1,4
6,4, its pingbian knife, 10,4 fulcrum pivots of fulcrum pivot box of fulcrum pivot 7,4 hold 11 and leveling base 9；
Leveling base 9 is the platform with leveling lower margin；Described 4 columns 2 for holding elevating mechanism with knife are distributed in
The midpoint of one rectangle four edges, each 2 bottom end of column for holding elevating mechanism with knife are fixed by screws in the leveling bottom
On seat 9, the top of each column 2 that elevating mechanism is held with knife is fixed with a native prefix component, holds 11 for fixed pivot knife,
The fulcrum pivot holds 11 and is fixed in the groove of native prefix component with adhesive, and 4 fulcrum pivots hold 11 and hand over for conllinear cross two-by-two
Fork；
The girder 1, which is one, has cuboid shape, the open box of upper port, in 1 four side walls of girder
Respectively there is a side knife 6 in middle and upper part, hangs a trim by being bonded in the lifting lug at the top of trim counterweight component on each side knife 6
Counterweight component 4；
There is a knife box 10 below the middle and upper parts of 1 four side walls of girder, side knife 6, there is one in knife box 10
Fulcrum pivot 7, each fulcrum pivot 7 with it is corresponding with knife hold the fulcrum pivot on the column 2 of elevating mechanism and hold 11 match；
On the side of each column 2 for holding elevating mechanism with knife, there is a horizontal step surface towards the position of girder 1
2a, four step surface 2a are coplanar；When knife, which holds elevating mechanism, is in unloading position, fulcrum pivot holds 11 sinkings, under 1 cassette bottom of girder
Surface is bonded with step surface 2a, and fulcrum pivot holds 11 and is in discrete state with fulcrum pivot 7；Load position is in when knife holds elevating mechanism
When setting, fulcrum pivot holds 11 risings, and the bottom surface of girder 1 and step surface 2a are detached from, and fulcrum pivot holds 11 and is in contact shape with fulcrum pivot 7
State；
The blade of the fulcrum pivot 7 of two sides is located at the vertical centre of girder 1 in the width direction and divides face equally girder 1 along its length
Interior, the blade of the fulcrum pivot 7 of two sides is located at the vertical centre of girder 1 along its length and divides equally in face girder 1 in the width direction；It is main
The blade of the fulcrum pivot 7 of two sides along its length of beam 1 is conllinear, and the blade of the fulcrum pivot 7 of two sides in the width direction of girder 1 is conllinear,
The straight line where the blade of the fulcrum pivot 7 of two sides and girder 1 fulcrum pivot 7 of two sides in the width direction along its length of girder 1
Blade line orthogonal, which is known as blade orthogonal points；
On the upper surface of 1 cassette bottom of girder along fixed two V-blocks 5 of 1 length direction of girder, two V type blocks 5 V-type
The center of slot divides that face is coplanar equally, and the center of V-groove divides face and the vertical centre of girder 1 in the width direction equally, and to divide face equally coplanar, and two
The distance of a 5 outer end face of V-block and the equal length of standardized centroid exemplar, two V-blocks 5 are relative to 1 cassette bottom upper surface of girder
Center vertical line it is symmetrical, blade orthogonal points is located on the center vertical line of 1 cassette bottom upper surface of girder；
V-groove base angle=90 °~120 °, when standardized centroid exemplar is located in the V-groove of two V-blocks 5, standard matter
The end face of heart exemplar is coplanar with the outer end face of V-block 5；When knife, which holds elevating mechanism, is in loading position, standardized centroid exemplar
Axis is located in following planes, which is straight line and girder of the girder 1 along its length where the blade of the fulcrum pivot 7 of two sides
1 in the width direction the fulcrum pivot 7 of two sides blade the plane that is determined of straight line；At this point, in the geometry of standardized centroid exemplar
Heart point is located on the center vertical line of above-mentioned 1 cassette bottom upper surface of girder.
A kind of measurement method of standardized centroid exemplar centroid position, it is characterised in that: use standard matter as described above
The step of heart exemplar centroid position two-dimentional measuring device measures, measurement is as follows:
1, three-dimensional system of coordinate is established: using above-mentioned blade orthogonal points as origin, with the fulcrum pivot of the two sides along its length of girder 1
Straight line where 7 blade is X-axis, and right is X-axis positive direction；With the blade institute of the fulcrum pivot 7 of two sides in the width direction of girder 1
Straight line be Y-axis, front be Y-axis positive direction；Z axis is determined according to the right-hand rule, and top is Z axis positive direction；
2, it loads: standardized centroid exemplar being placed in the V-groove of two V-blocks 5 on 1 bottom surface of girder, standardized centroid
Exemplar end face is coplanar with 5 outer end face of V-block, then the geometric center point of standardized centroid exemplar is located on above-mentioned coordinate origin,
Axis is overlapped with above-mentioned coordinate system X-axis；
3, X-direction load measurement: the two-dimentional center mass measuring device of X-direction is opened, makes 2, column that hold elevating mechanism with knife
In loading position, fulcrum pivot holds 11 and is in contact condition with fulcrum pivot 7, and the offset of girder 1 is measured by sensor 3, is passed through
The gravitational moment for the torque compensation standardized centroid exemplar that trim counterweight 4 generates makes girder offset 0；
4, coordinate Δ L of the mass center in X-direction of standardized centroid exemplar is calculated1:
Wherein, Δ L1: X-direction centroid position offset；W: standardized centroid exemplar quality；m1: X on the right side of counterweight trimmer
The quality of direction counterweight；m2: the quality of X-direction counterweight on the left of counterweight trimmer；L1: measuring system crossbeam X-direction right arm is long；
L2: measuring system crossbeam X-direction left arm is long；
5, Y-direction load measurement: the two-dimentional center mass measuring device of Y-direction is opened, makes 2, column that hold elevating mechanism with knife
In loading position, fulcrum pivot holds 11 and is in contact condition with fulcrum pivot 7, and the offset of girder 1 is measured by sensor 3, is passed through
The gravitational moment for the torque compensation standardized centroid exemplar that trim counterweight 4 generates makes girder offset 0；
6, the coordinate Δ L of the mass center of standardized centroid exemplar in the Y direction is calculated2:
Wherein, Δ L2: Y-direction centroid position offset；W: standardized centroid exemplar quality；m3: counterweight trimmer Y-direction
The quality of right side counterweight；m4: the quality of counterweight on the left of counterweight trimmer Y-direction；L3: measuring system crossbeam Y-direction right arm is long；
L4: measuring system crossbeam Y-direction left arm is long；
7, Z-direction load measurement: standardized centroid exemplar is rotated by 90 ° along its axle center, at this point, the Z axis before rotation becomes revolving
Y-axis after turning, defining postrotational Y-axis is new Y-axis；The two-dimentional center mass measuring device for opening Y-direction makes band knife hold elevating mechanism
Column 2 be located at loading position, fulcrum pivot holds 11 and be in contact condition with fulcrum pivot 7, passes through the inclined of the measurement girder 1 of sensor 3
The gravitational moment of shifting amount, the torque compensation standardized centroid exemplar generated by trim counterweight 4 makes girder offset 0；
8, coordinate Δ L of the mass center in Z-direction of standardized centroid exemplar is calculated3:
Wherein, Δ L3: Z-direction centroid position offset；W: standardized centroid exemplar quality；m5: counterweight trimmer Z-direction
The quality of right side counterweight；m6: the quality of counterweight on the left of counterweight trimmer Z-direction；L3: measuring system crossbeam Z-direction right arm is long；
L4: measuring system crossbeam Z-direction left arm is long.
The invention has the advantages that a kind of standardized centroid exemplar centroid position two-dimentional measuring device and measurement method are proposed,
Without dismantling weighing sensor or load cell in periodic calibration, avoid because disassembling operations cause its position that can become
Change；The contact surface for improving weighing sensor or load cell facilitates the position for determining its practical supporting point, improves survey
Measure accuracy.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the invention.In figure, direction is front in paper, and paper outside direction is rear, up and down side
To constant.
Fig. 2 is the side view of Fig. 1.
Fig. 3 is measuring principle schematic diagram of the invention.
Specific embodiment
The present invention is described in further details below.Referring to Fig. 1 to Fig. 2, a kind of standardized centroid exemplar centroid position two
Tie up measuring device, it is characterised in that: it includes that 1,42,4, column sensor 3,4 for holding elevating mechanism with knife of girder is matched
6,4, day pingbian knife, 10,4 fulcrum pivots of fulcrum pivot box of fulcrum pivot 7,4 of V-block 5,4 of flat counterweight component 4,2 hold 11 and adjust
Flat bed 9；
Leveling base 9 is the platform with leveling lower margin；Described 4 columns 2 for holding elevating mechanism with knife are distributed in
The midpoint of one rectangle four edges, each 2 bottom end of column for holding elevating mechanism with knife are fixed by screws in the leveling bottom
On seat 9, the top of each column 2 that elevating mechanism is held with knife is fixed with a native prefix component, holds 11 for fixed pivot knife,
The fulcrum pivot holds 11 and is fixed in the groove of native prefix component with adhesive, and 4 fulcrum pivots hold 11 and hand over for conllinear cross two-by-two
Fork；
The girder 1, which is one, has cuboid shape, the open box of upper port, in 1 four side walls of girder
Respectively there is a side knife 6 in middle and upper part, hangs a trim by being bonded in the lifting lug at the top of trim counterweight component on each side knife 6
Counterweight component 4；
There is a knife box 10 below the middle and upper parts of 1 four side walls of girder, side knife 6, there is one in knife box 10
Fulcrum pivot 7, each fulcrum pivot 7 with it is corresponding with knife hold the fulcrum pivot on the column 2 of elevating mechanism and hold 11 match；
On the side of each column 2 for holding elevating mechanism with knife, there is a horizontal step surface towards the position of girder 1
2a, four step surface 2a are coplanar；When knife, which holds elevating mechanism, is in unloading position, fulcrum pivot holds 11 sinkings, under 1 cassette bottom of girder
Surface is bonded with step surface 2a, and fulcrum pivot holds 11 and is in discrete state with fulcrum pivot 7；Load position is in when knife holds elevating mechanism
When setting, fulcrum pivot holds 11 risings, and the bottom surface of girder 1 and step surface 2a are detached from, and fulcrum pivot holds 11 and is in contact shape with fulcrum pivot 7
State；
The blade of the fulcrum pivot 7 of two sides is located at the vertical centre of girder 1 in the width direction and divides face equally girder 1 along its length
Interior, the blade of the fulcrum pivot 7 of two sides is located at the vertical centre of girder 1 along its length and divides equally in face girder 1 in the width direction；It is main
The blade of the fulcrum pivot 7 of two sides along its length of beam 1 is conllinear, and the blade of the fulcrum pivot 7 of two sides in the width direction of girder 1 is conllinear,
The straight line where the blade of the fulcrum pivot 7 of two sides and girder 1 fulcrum pivot 7 of two sides in the width direction along its length of girder 1
Blade line orthogonal, which is known as blade orthogonal points；
On the upper surface of 1 cassette bottom of girder along fixed two V-blocks 5 of 1 length direction of girder, two V type blocks 5 V-type
The center of slot divides that face is coplanar equally, and the center of V-groove divides face and the vertical centre of girder 1 in the width direction equally, and to divide face equally coplanar, and two
The distance of a 5 outer end face of V-block and the equal length of standardized centroid exemplar, two V-blocks 5 are relative to 1 cassette bottom upper surface of girder
Center vertical line it is symmetrical, blade orthogonal points is located on the center vertical line of 1 cassette bottom upper surface of girder；
V-groove base angle=90 °~120 °, when standardized centroid exemplar is located in the V-groove of two V-blocks 5, standard matter
The end face of heart exemplar is coplanar with the outer end face of V-block 5；When knife, which holds elevating mechanism, is in loading position, standardized centroid exemplar
Axis is located in following planes, which is straight line and girder of the girder 1 along its length where the blade of the fulcrum pivot 7 of two sides
1 in the width direction the fulcrum pivot 7 of two sides blade the plane that is determined of straight line；At this point, in the geometry of standardized centroid exemplar
Heart point is located on the center vertical line of above-mentioned 1 cassette bottom upper surface of girder.
A kind of measurement method of standardized centroid exemplar centroid position, it is characterised in that: use standard matter as described above
The step of heart exemplar centroid position two-dimentional measuring device measures, measurement is as follows:
1, three-dimensional system of coordinate is established: using above-mentioned blade orthogonal points as origin, with the fulcrum pivot of the two sides along its length of girder 1
Straight line where 7 blade is X-axis, and right is X-axis positive direction；With the blade institute of the fulcrum pivot 7 of two sides in the width direction of girder 1
Straight line be Y-axis, front be Y-axis positive direction；Z axis is determined according to the right-hand rule, and top is Z axis positive direction；
2, it loads: standardized centroid exemplar being placed in the V-groove of two V-blocks 5 on 1 bottom surface of girder, standardized centroid
Exemplar end face is coplanar with 5 outer end face of V-block, then the geometric center point of standardized centroid exemplar is located on above-mentioned coordinate origin,
Axis is overlapped with above-mentioned coordinate system X-axis；
3, X-direction load measurement: the two-dimentional center mass measuring device of X-direction is opened, makes 2, column that hold elevating mechanism with knife
In loading position, fulcrum pivot holds 11 and is in contact condition with fulcrum pivot 7, and the offset of girder 1 is measured by sensor 3, is passed through
The gravitational moment for the torque compensation standardized centroid exemplar that trim counterweight 4 generates makes girder offset 0；
4, coordinate Δ L of the mass center in X-direction of standardized centroid exemplar is calculated1:
Wherein, Δ L1: X-direction centroid position offset；W: standardized centroid exemplar quality；m1: X on the right side of counterweight trimmer
The quality of direction counterweight；m2: the quality of X-direction counterweight on the left of counterweight trimmer；L1: measuring system crossbeam X-direction right arm is long；
L2: measuring system crossbeam X-direction left arm is long；
5, Y-direction load measurement: the two-dimentional center mass measuring device of Y-direction is opened, makes 2, column that hold elevating mechanism with knife
In loading position, fulcrum pivot holds 11 and is in contact condition with fulcrum pivot 7, and the offset of girder 1 is measured by sensor 3, is passed through
The gravitational moment for the torque compensation standardized centroid exemplar that trim counterweight 4 generates makes girder offset 0；
6, the coordinate Δ L of the mass center of standardized centroid exemplar in the Y direction is calculated2:
Wherein, Δ L2: Y-direction centroid position offset；W: standardized centroid exemplar quality；m3: counterweight trimmer Y-direction
The quality of right side counterweight；m4: the quality of counterweight on the left of counterweight trimmer Y-direction；L3: measuring system crossbeam Y-direction right arm is long；
L4: measuring system crossbeam Y-direction left arm is long；
7, Z-direction load measurement: standardized centroid exemplar is rotated by 90 ° along its axle center, at this point, the Z axis before rotation becomes revolving
Y-axis after turning, defining postrotational Y-axis is new Y-axis；The two-dimentional center mass measuring device for opening Y-direction makes band knife hold elevating mechanism
Column 2 be located at loading position, fulcrum pivot holds 11 and be in contact condition with fulcrum pivot 7, passes through the inclined of the measurement girder 1 of sensor 3
The gravitational moment of shifting amount, the torque compensation standardized centroid exemplar generated by trim counterweight 4 makes girder offset 0；
8, coordinate Δ L of the mass center in Z-direction of standardized centroid exemplar is calculated3:
Wherein, Δ L3: Z-direction centroid position offset；W: standardized centroid exemplar quality；m5: counterweight trimmer Z-direction
The quality of right side counterweight；m6: the quality of counterweight on the left of counterweight trimmer Z-direction；L3: measuring system crossbeam Z-direction right arm is long；
L4: measuring system crossbeam Z-direction left arm is long.
Measuring principle of the invention is: device has 4 columns that elevating mechanism is held with knife, the blade two of 4 fulcrum pivots
Two is conllinear, and the line orthogonal where two conllinear fulcrum pivot blades can realize the two of X-axis and Y-axis according to principle of moment balance respectively
Tie up centroid position measurement.Double measurement, the three-dimensional matter of available standardized centroid exemplar are carried out by rotation standardized centroid exemplar
Heart position.It is the centroid position measuring principle schematic diagram of Y direction, centroid position is as shown in figure 3, with above-mentioned measurement referring to Fig. 3
Method establishes coordinate system, then Δ L2As for the centroid position of mass center master body in the coordinate of Y-axis, W is standardized centroid exemplar matter
Amount；m3For the quality of counterweight on the right side of counterweight trimmer Y-direction；m4For the quality of counterweight on the left of counterweight trimmer Y-direction； L3
It is long for measuring system crossbeam Y-direction right arm；L4It is long for measuring system crossbeam Y-direction left arm, then the mass center position of mass center master body
The coordinate set in Y-axis isSimilarly, center mass measuring device is opened in the measurement of X-direction, can be obtained
Coordinate of the centroid position of mass center master body in X-axis；It is rotated by 90 ° centered on standardized centroid exemplar axle center, opens mass center and survey
Device is measured in the measurement of Y direction, coordinate of the centroid position in Z axis of mass center master body can be obtained.
Embodiment
It is used with knife hold the column 2 of elevating mechanism, sensor 3, trim counterweight component 4, V-block 5, day pingbian knife 6,
It is finished parts that fulcrum pivot 7, fulcrum pivot box 10 and fulcrum pivot, which hold 11,.V-groove base angle=120 °.Girder 1X axis positive direction brachium
L1=1150mm, X-axis negative direction brachium L2=1150mm；Y-axis positive direction brachium L1=650mm, Y-axis negative direction brachium L2=
650mm.The size of standardized centroid exemplar are as follows: long 1000mm, radius 180mm；The quality W=800000g of standardized centroid exemplar.
The step of measurement, is as follows:
1, three-dimensional system of coordinate is established: using the blade orthogonal points of fulcrum pivot 7 as origin, with the two sides along its length of girder 1
Straight line where the blade of fulcrum pivot 7 is X-axis, and right is X-axis positive direction；With the fulcrum pivot 7 of two sides in the width direction of girder 1
Straight line where blade is Y-axis, and front is Y-axis positive direction；Z axis is determined according to the right-hand rule, and top is Z axis positive direction；
2, it loads: standardized centroid exemplar being placed in the V-groove of two V-blocks 5 on 1 bottom surface of girder, standardized centroid
Exemplar end face is coplanar with 5 outer end face of V-block, then the geometric center point of standardized centroid exemplar is located on above-mentioned coordinate origin,
Axis is overlapped with above-mentioned coordinate system X-axis；
3, X-direction load measurement: the two-dimentional center mass measuring device of X-direction is opened, makes 2, column that hold elevating mechanism with knife
In loading position, fulcrum pivot holds 11 and is in contact condition with fulcrum pivot 7, and the offset of girder 1 is measured by sensor 3, is passed through
The gravitational moment for the torque compensation standardized centroid exemplar that trim counterweight 4 generates makes girder offset 0, and in trim counterweight 4, right side is matched
Flat counterweight m1For 3g, left side trim counterweight m2For 0g；
4, coordinate Δ L of the mass center in X-direction of standardized centroid exemplar is calculated1:
5, Y-direction load measurement: the two-dimentional center mass measuring device of Y-direction is opened, makes 2, column that hold elevating mechanism with knife
In loading position, fulcrum pivot holds 11 and is in contact condition with fulcrum pivot 7, and the offset of girder 1 is measured by sensor 3, is passed through
The gravitational moment for the torque compensation standardized centroid exemplar that trim counterweight 4 generates makes girder offset 0, and in trim counterweight 4, right side is matched
Flat counterweight m3For 0g, left side trim counterweight m4For 1g；
6, the coordinate Δ L of the mass center of standardized centroid exemplar in the Y direction is calculated2:
7, Z-direction load measurement: standardized centroid exemplar is rotated by 90 ° counterclockwise along its axle center, at this point, the Z axis before rotation
Become postrotational Y-axis, defining postrotational Y-axis is new Y-axis；The two-dimentional center mass measuring device for opening Y-direction makes band knife hold liter
The column 2 of descending mechanism is located at loading position, and fulcrum pivot holds 11 and is in contact condition with fulcrum pivot 7, measures girder by sensor 3
The gravitational moment of 1 offset, the torque compensation standardized centroid exemplar generated by trim counterweight 4 makes girder offset 0, trim
In counterweight 4, right side trim counterweight m5For 2g, left side trim counterweight m6For 0g；
8, coordinate Δ L of the mass center in Z-direction of standardized centroid exemplar is calculated3:
。
Claims (2)
1. a kind of standardized centroid exemplar centroid position two-dimentional measuring device, it is characterised in that: it include girder (1), 4 band knives hold
The column (2) of elevating mechanism, 4 sensors (3), 4 trim counterweight components (4), 2 V-blocks (5), 4 day pingbian knives (6),
4 fulcrum pivots (7), 4 fulcrum pivot boxes (10), 4 fulcrum pivots hold (11) and leveling base (9)；
Leveling base (9) is the platform with leveling lower margin；Described 4 columns (2) for holding elevating mechanism with knife are distributed in
The midpoint of one rectangle four edges, each column (2) bottom end for holding elevating mechanism with knife are fixed by screws in the leveling
On pedestal (9), the top of each column (2) that elevating mechanism is held with knife is fixed with a native prefix component, is used for fixed pivot
Knife is held (11), and the fulcrum pivot holds (11) and is fixed in the groove of native prefix component with adhesive, and it is two that 4 fulcrum pivots, which hold (11),
Two conllinear right-angled intersections；
The girder (1), which is one, has cuboid shape, the open box of upper port, in (1) four side wall of girder
Respectively there is a side knife (6) in middle and upper part, hangs one by being bonded in the lifting lug at the top of trim counterweight component on each side knife (6)
Trim counterweight component (4)；
There is a knife box (10) below the middle and upper part of (1) four side wall of girder, side knife (6), has in knife box (10)
One fulcrum pivot (7), each fulcrum pivot (7) hold the fulcrum pivot on the column (2) of elevating mechanism with knife and hold (11) with corresponding
It matches；
There is a horizontal step surface on the side of each column (2) for holding elevating mechanism with knife, towards the position of girder (1)
(2a), four step surfaces (2a) are coplanar；When knife, which holds elevating mechanism, is in unloading position, fulcrum pivot holds (11) sinking, girder (1)
The lower surface of cassette bottom is bonded with step surface (2a), and fulcrum pivot holds (11) and fulcrum pivot (7) and is in discrete state；When knife holds elevator
When structure is in loading position, fulcrum pivot holds (11) rising, and the bottom surface of girder (1) and step surface (2a) are detached from, and fulcrum pivot holds (11)
Contact condition is in fulcrum pivot (7)；
The blade of the fulcrum pivot (7) of two sides is located at the vertical centre of girder (1) in the width direction and divides equally girder (1) along its length
In face, it is flat that the blade of girder (1) fulcrum pivot (7) of two sides in the width direction is located at the vertical centre of girder (1) along its length
In facet；The blade of girder (1) fulcrum pivot (7) of two sides along its length is conllinear, the fulcrum of girder (1) two sides in the width direction
The blade of knife (7) is conllinear, girder (1) along its length the straight line where the blade of the fulcrum pivot (7) of two sides and girder (1) along width
Spend the blade of the fulcrum pivot (7) of direction two sides line orthogonal, which is known as blade orthogonal points；
On the upper surface of girder (1) cassette bottom along fixed two V-blocks (5) of girder (1) length direction, two V-blocks (5)
The center of V-groove divides that face is coplanar equally, the center of V-groove divide face equally and the vertical centre of girder (1) in the width direction to divide face equally total
Face, the distance of two V-block (5) outer end faces and the equal length of standardized centroid exemplar, two V-blocks (5) are relative to girder (1)
The center vertical line of cassette bottom upper surface is symmetrical, and blade orthogonal points is located on the center vertical line of girder (1) cassette bottom upper surface；
V-groove base angle=90 °~120 °, when standardized centroid exemplar is located in the V-groove of two V-blocks (5), standardized centroid
The end face of exemplar is coplanar with the outer end face of V-block (5)；When knife, which holds elevating mechanism, is in loading position, standardized centroid exemplar
Axis is located in following planes, the plane be girder (1) along its length the straight line where the blade of the fulcrum pivot (7) of two sides with
Girder (1) in the width direction the fulcrum pivot (7) of two sides blade the plane that is determined of straight line；At this point, standardized centroid exemplar
Geometric center point be located on the center vertical line of above-mentioned girder (1) cassette bottom upper surface.
2. a kind of measurement method of standardized centroid exemplar centroid position, it is characterised in that: use standard as described in claim 1
The step of mass center exemplar centroid position two-dimentional measuring device measures, measurement is as follows:
2.1, three-dimensional system of coordinate is established:
Using above-mentioned blade orthogonal points as origin, with the straight line where girder (1) the along its length blade of the fulcrum pivot (7) of two sides
For X-axis, right is X-axis positive direction；With the straight line where girder (1) the in the width direction blade of the fulcrum pivot (7) of two sides for Y
Axis, front are Y-axis positive direction；Z axis is determined according to the right-hand rule, and top is Z axis positive direction；
2.2, it loads: standardized centroid exemplar being placed in the V-groove of two V-blocks (5) on girder (1) bottom surface, standard matter
Heart exemplar end face is coplanar with V-block (5) outer end face, then the geometric center point of standardized centroid exemplar is located at above-mentioned coordinate origin
On, axis is overlapped with above-mentioned coordinate system X-axis；
2.3, X-direction load measurement: the two-dimentional center mass measuring device of X-direction is opened, column (2) position for holding elevating mechanism with knife is made
In loading position, fulcrum pivot holds (11) and fulcrum pivot (7) and is in contact condition, passes through the offset of sensor (3) measurement girder (1)
The gravitational moment of amount, the torque compensation standardized centroid exemplar generated by trim counterweight (4) makes girder offset 0；
2.4, coordinate Δ L of the mass center in X-direction of standardized centroid exemplar is calculated1:
Wherein, Δ L1: X-direction centroid position offset；W: standardized centroid exemplar quality；m1: X-direction on the right side of counterweight trimmer
The quality of counterweight；m2: the quality of X-direction counterweight on the left of counterweight trimmer；L1: measuring device girder X-direction right arm is long；L2: it surveys
It is long to measure device girder X-direction left arm；
2.5, Y-direction load measurement: the two-dimentional center mass measuring device of Y-direction is opened, column (2) position for holding elevating mechanism with knife is made
In loading position, fulcrum pivot holds (11) and fulcrum pivot (7) and is in contact condition, passes through the offset of sensor (3) measurement girder (1)
The gravitational moment of amount, the torque compensation standardized centroid exemplar generated by trim counterweight (4) makes girder offset 0；
2.6, the coordinate Δ L of the mass center of standardized centroid exemplar in the Y direction is calculated2:
Wherein, Δ L2: Y-direction centroid position offset；W: standardized centroid exemplar quality；m3: on the right side of counterweight trimmer Y-direction
The quality of counterweight；m4: the quality of counterweight on the left of counterweight trimmer Y-direction；L3: measuring device girder Y-direction right arm is long；L4: it surveys
It is long to measure device girder Y-direction left arm；
2.7, Z-direction load measurement: standardized centroid exemplar is rotated by 90 ° along its axle center, at this point, the Z axis before rotation becomes rotating
Y-axis afterwards, defining postrotational Y-axis is new Y-axis；The two-dimentional center mass measuring device for opening Y-direction, makes to hold elevating mechanism with knife
Column (2) is located at loading position, and fulcrum pivot holds (11) and fulcrum pivot (7) and is in contact condition, measures girder by sensor (3)
(1) gravitational moment of offset, the torque compensation standardized centroid exemplar generated by trim counterweight (4) makes girder offset 0；
2.8, coordinate Δ L of the mass center in Z-direction of standardized centroid exemplar is calculated3:
Wherein, Δ L3: Z-direction centroid position offset；W: standardized centroid exemplar quality；m5: on the right side of counterweight trimmer Z-direction
The quality of counterweight；m6: the quality of counterweight on the left of counterweight trimmer Z-direction；L3: measuring device girder Z-direction right arm is long；L4: it surveys
It is long to measure device girder Z-direction left arm.
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