CN202329939U - Device for measuring center of mass of object - Google Patents

Abstract

The utility model relates to a test device for static balance of a machine or a structural part, in particular to a device for measuring the center of mass of an object. The device is easy and convenient to operate. The device comprises a circular disk, an overturning plate, three slings, a bracket and tension sensors, wherein the circular disk is horizontally arranged in a suspension mode; a rectangular through hole is formed in the center of the circular disk; the overturning plate is positioned in the rectangular through hole; the three slings are positioned at the edge of the circular disk; the bracket is connected with the other end of each sling; and the tension sensor is positioned on each sling. The device is simple in principle, easy to control, convenient to operate, and applicable to most complicated power equipment.

Description

The object mass center position-measurement device

Technical field

The present invention relates to the orthostatic proving installation of machine or structure member, further relate to the mensuration of object mass center position.

Background technology

The object mass center position is an important physical parameter in the Machine Design; Particularly for complicated, erose object; Its centroid position is to be difficult to rely on observe obtain, must be by means of testing, and the means more complicated of test object barycenter of the prior art also relatively is unfavorable for the measurement of big parts; Therefore, be badly in need of a kind of easy object mass center measurement mechanism.

Summary of the invention

The invention provides a kind of object mass center measurement mechanism easy and simple to handle.Surpass 500kg for quality, the large-sized power plant that physical dimension surpasses 1.5m has remarkable advantages more.

The technical scheme that the present invention adopted is following:

The object mass center position-measurement device comprises: the disk of the unsettled placement of level; There is 1 rectangular through-hole at the disc centre place; Be positioned at rectangular through-hole; The turnover panel identical with the rectangular through-hole profile; The center, two sides of turnover panel symmetry is hinged with the center of corresponding disk rectangular through-hole side; Said turnover panel can overturn with respect to disk along the hinged place at any angle, and said turnover panel is used to hold testee; Be positioned at disk outer rim place, equidistantly distribute and perpendicular to 3 hoist cables of disk, wherein the line of 2 hoist cables is parallel to the line of turnover panel hinged place; The support that is connected with the hoist cable other end; Be positioned at the pulling force sensor on the every hoist cable.

Said rectangular through-hole profile is square preferably, and said turnover panel profile is square preferably.

As further preferred version, also comprise: be positioned at the rope lengths regulating device on the every hoist cable.

On said apparatus, realize the object mass center location measurement method; Definition: three ropes are respectively first rope, second rope, the 3rd rope; Its corresponding pulling force sensor is respectively first pulling force sensor, second pulling force sensor, the 3rd pulling force sensor, and on disk, the node of three ropes and disk is defined as first node, second node, the 3rd node respectively; Second node and the 3rd node line are parallel to the line of turnover panel hinged place; The mid point of second node and the 3rd node line is true origin O, the line of second node and point three nodes and to point to the 3rd node direction be X-direction, and the distance definition of circle disk center distance X axle is a; The distance definition of the first node distance X axle is b, and the distance definition of second node or the 3rd node range coordinate initial point is c; The true origin O and the first node line and to point to the first node direction be Y direction, the direction vertically upward through true origin O is a Z-direction, and the quality definition of disk is M, and the acceleration of gravity of measuring the place is defined as g, and the anglec of rotation of turnover panel is defined as θ; Step comprises:

Step 1: the adjustment disk makes its maintenance level;

Step 2: the adjustment turnover panel, guarantee θ=0;

Step 3: testee is placed on the turnover panel;

Step 4: read first pulling force sensor reading this moment F ₁₁, second pulling force sensor reading F ₁₂, the 3rd pulling force sensor reading F ₁₃

Step 5: turnover panel is rotated θ along OY direction hinged place;

Step 6: read first pulling force sensor reading this moment F ₂₁, second pulling force sensor reading F ₂₂, the 3rd pulling force sensor reading F ₂₃

Measurement result: establish the distance of testee centroid distance testee true origin on X, Y, Z direction and be respectively X ₀, Y ₀, Z ₀,

$X_0=\frac{(F_{13}-F_{12})*c}{F_{11}+F_{12}+F_{13}-\mathrm{Mg}},$

$Y_0=\frac{F_{12}*b-\mathrm{Mg}*a}{F_{11}+F_{12}+F_{13}-\mathrm{Mg}},$

$Z_0=\frac{(F_{23}-F_{22})*c*(1-\cos \mathrm{\θ})}{(F_{21}+F_{22}+F_{23}-\mathrm{Mg})*\sin \mathrm{\θ}}.$

When after on the every hoist cable rope lengths regulating device being installed, step comprises:

Step 1: on turnover panel, do not place any object, read first pulling force sensor reading this moment F ₀₁, second pulling force sensor reading F ₀₂, the 3rd pulling force sensor reading F ₀₃If, F ₀₁=F ₀₂=F ₀₃, then change step 3, otherwise change step 2;

Step 2: adjust corresponding rope lengths regulating device;

Step 3: the adjustment turnover panel, guarantee θ=0;

Step 4: testee is placed on the turnover panel;

Step 5: read first pulling force sensor reading this moment F ₁₁, second pulling force sensor reading F ₁₂, the 3rd pulling force sensor reading F ₁₃

Step 6: turnover panel is rotated θ along the hinged place;

Step 7: read first pulling force sensor reading this moment F ₂₁, second pulling force sensor reading F ₂₂, the 3rd pulling force sensor reading F ₂₃

Measurement result: establish the distance of testee centroid distance testee true origin on X, Y, Z direction and be respectively

X ₀、Y ₀、Z ₀，

$X_0=\frac{(F_{13}-F_{12})*c}{F_{11}+F_{12}+F_{13}-\mathrm{Mg}},$

$Y_0=\frac{F_{12}*b-\mathrm{Mg}*a}{F_{11}+F_{12}+F_{13}-\mathrm{Mg}},$

$Z_0=\frac{(F_{23}-F_{22})*c*(1-\cos \mathrm{\θ})}{(F_{21}+F_{22}+F_{23}-\mathrm{Mg})*\sin \mathrm{\θ}}.$

The principle of the invention is simple, is easy to control, is convenient to operation, is suitable for the power-equipment of most of complicacies.

Description of drawings

Fig. 1 is the synoptic diagram of embodiment.1 represents support among the figure, and 2 represent pulling force sensor; 3 represent testee, and 4 represent hoist cable, and 5 represent the rope lengths regulating device, and 6 represent disk, and 7 represent charge amplifier, and 8 represent computing machine, and 10 represent turnover panel.

Fig. 2 is the horizontal coordinates among the embodiment.

Fig. 3 is the three-dimensional coordinate system among the embodiment.

Embodiment

Map 1-3 explains embodiment of the present invention.

The object mass center position-measurement device comprises: the disk 6 of the unsettled placement of level; There is 1 rectangular through-hole at the disc centre place; Be positioned at rectangular through-hole; The turnover panel 10 identical with the rectangular through-hole profile; The center, two sides of turnover panel symmetry is hinged with the center of corresponding disk rectangular through-hole side; Said turnover panel can overturn with respect to disk along the hinged place at any angle, and said turnover panel is used to hold testee 3; Be positioned at disk outer rim place, equidistantly distribute and perpendicular to 3 hoist cables 4 of disk, wherein the line of 2 hoist cables is parallel to the line of turnover panel hinged place; The support 1 that is connected with the hoist cable other end; Be positioned at the pulling force sensor 2 on the every hoist cable; Be positioned at the rope lengths regulating device 5 on the every hoist cable; The charge amplifier 7 of connecting with pulling force sensor, the computing machine 8 that links to each other with charge amplifier.

Said rectangular through-hole profile is a square, and said turnover panel profile is a square.

On said apparatus, realize the object mass center location measurement method; Definition: three ropes are respectively first rope, second rope, the 3rd rope; Its corresponding pulling force sensor is respectively first pulling force sensor, second pulling force sensor, the 3rd pulling force sensor, and on disk, the node of three ropes and disk is defined as first node, second node, the 3rd node respectively; Second node and the 3rd node line are parallel to the line of turnover panel hinged place; The mid point of second node and the 3rd node line is true origin O, the line of second node and point three nodes and to point to the 3rd node direction be X-direction, and the distance definition of circle disk center distance X axle is a; The distance definition of the first node distance X axle is b, and the distance definition of second node or the 3rd node range coordinate initial point is c; The true origin O and the first node line and to point to the first node direction be Y direction, the direction vertically upward through true origin O is a Z-direction, and the quality definition of disk is M, and the acceleration of gravity of measuring the place is defined as g, and the anglec of rotation of turnover panel is defined as θ; Step comprises:

Step 1: on turnover panel, do not place any object, read first pulling force sensor reading this moment F ₀₁, second pulling force sensor reading F ₀₂, the 3rd pulling force sensor reading F ₀₃If, F ₀₁=F ₀₂=F ₀₃, then change step 3, otherwise change step 2;

Step 2: adjust corresponding rope lengths regulating device;

Step 3: the adjustment turnover panel, guarantee θ=0;

Step 4: testee is placed on the turnover panel;

Step 5: read first pulling force sensor reading this moment F ₁₁, second pulling force sensor reading F ₁₂, the 3rd pulling force sensor reading F ₁₃

Step 6: turnover panel is rotated θ along the hinged place;

Step 7: read first pulling force sensor reading this moment F ₂₁, second pulling force sensor reading F ₂₂, the 3rd pulling force sensor reading F ₂₃

Measurement result: establish the distance of testee centroid distance testee true origin on X, Y, Z direction and be respectively

X ₀、Y ₀、Z ₀，

$X_0=\frac{(F_{13}-F_{12})*c}{F_{11}+F_{12}+F_{13}-\mathrm{Mg}},$

$Y_0=\frac{F_{12}*b-\mathrm{Mg}*a}{F_{11}+F_{12}+F_{13}-\mathrm{Mg}},$

$Z_0=\frac{(F_{23}-F_{22})*c*(1-\cos \mathrm{\θ})}{(F_{21}+F_{22}+F_{23}-\mathrm{Mg})*\sin \mathrm{\θ}}.$

Claims (4)

1. the object mass center position-measurement device is characterized in that, comprising: the disk of the unsettled placement of level; There is 1 rectangular through-hole at the disc centre place; Be positioned at rectangular through-hole; The turnover panel identical with the rectangular through-hole profile; The center, two sides of turnover panel symmetry is hinged with the center of corresponding disk rectangular through-hole side; Said turnover panel can overturn with respect to disk along the hinged place at any angle, and said turnover panel is used to hold testee; Be positioned at disk outer rim place, equidistantly distribute and perpendicular to 3 hoist cables of disk, wherein the line of 2 hoist cables is parallel to the line of turnover panel hinged place; The support that is connected with the hoist cable other end; Be positioned at the pulling force sensor on the every hoist cable.

2. according to the said object mass center position-measurement device of claim 1, it is characterized in that said rectangular through-hole is a square, said turnover panel profile is a square.

3. according to the said object mass center position-measurement device of claim 1, it is characterized in that, also comprise: be positioned at the rope lengths regulating device on the every hoist cable.

4. according to the said object mass center position-measurement device of claim 3, it is characterized in that said rectangular through-hole is a square, said turnover panel profile is a square.

Images