CN202994369U - Quality characteristic measuring instrument - Google Patents
Quality characteristic measuring instrument Download PDFInfo
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- CN202994369U CN202994369U CN 201320024542 CN201320024542U CN202994369U CN 202994369 U CN202994369 U CN 202994369U CN 201320024542 CN201320024542 CN 201320024542 CN 201320024542 U CN201320024542 U CN 201320024542U CN 202994369 U CN202994369 U CN 202994369U
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Abstract
The utility model discloses a quality characteristic measuring instrument. The quality characteristic measuring instrument comprises a support platform (1), a base (4) and an adjusting mechanism (9), wherein the adjusting mechanism (9) is arranged between the support platform (1) and the base (4), a round base is arranged on the top of the adjusting mechanism (9), the support platform (1) is fixed on the round base, vertical brackets are arranged on the two sides of the adjusting mechanism (9) to connect with the base (4). The quality characteristic measuring instrument also comprises a rotary servo motor (2) arranged in the middle of the adjusting mechanism (9), a side-sway bracket (8) around the periphery of the adjusting mechanism (9), a linear servo motor (3) fixed on the side surface of the side-sway bracket (8), and a gravity sensor (5) distributed between the side-sway bracket (8) and a pillar. By adopting the above structure, the rotation inertia moment of any irregular object around given axis is measured, the precision is high, and the use value of the instrument is very high.
Description
Technical field
The utility model relates to measuring instrument, is specifically related to the mass property measuring instrument.
Background technology
At present, the method for mass measurement and barycenter location is varied.Different according to measuring principle, usually can be divided into: suspension method, quality reaction method, out-of-balance force moments method, balancing act, multiple spot weighing method, spin balancing method, inertia method and physical pendulum mensuration etc.This programme will adopt the multiple spot weight method.The multiple spot weight method forms support platform also based on the static weighing technology jointly with a plurality of LOAD CELLS, and barycenter asks square to calculate by each sensor with respect to the position of reference center by the equilibrium relation of force and moment between support reaction and gravity.We know that moment of inertia is the physical quantity of describing the inertia size of rigid body in rotation.Be defined as: I=∑ (Δ m
ir
i 2), can obtain its determinative and be according to definition: the distribution of the quality of rigid body, the position of rotating shaft, quality.Because the gravity acceleration g in general measure place is normal value, so center of gravity and barycenter overlap in position, need find center of gravity can determine barycenter.Seeking center of gravity can be according to the difference of number of probes used and arrangement form, and the multiple spot weight method can be divided into three point measurements and four point measurement modes usually.Measurement mechanism by survey measurements, utilizes simple geometric relationship and force analysis with equilateral triangle or other graphical layout, can draw the distance of barycenter and geometrical center.
The method is simple in structure, once can obtain axially and two center-of-mass coordinates radially, and measurement quality simultaneously.Due to after measuring structure and being based on LOAD CELLS and arm of force unique point and measuring, obtain by position calculation, the method requires very high to the measuring accuracy of sensor and geometric position.The moment of inertia of any shaped objects can be by calculating in theory, what in fact run in the production application process is all that irregularly shaped object is in the majority basically, understand producing suitable error for complicated irregular body by calculating, generally all adopt experimental technique to determine.The dynamic method of modal method, three-line pendulum method, compound pendulum, Inertia Based on Torsion Pendulum Method etc.Existing measuring instrument all can't be measured the inertia that any irregularly shaped object rotates around any given rotating shaft directly, rapidly and easily, makes troubles to production.
The utility model content
The utility model has overcome the deficiencies in the prior art, and the mass property measuring instrument is provided, and in the solution prior art, measuring instrument can't be measured any irregularly shaped object around moment of inertia and the low defective of precision of any given axle.
for solving above-mentioned technical matters, the utility model is by the following technical solutions: a kind of mass property measuring instrument, comprise support platform, base and adjusting mechanism, described adjusting mechanism is between support platform and base, the adjusting mechanism top is provided with cup dolly, described support platform is fixed on cup dolly, described adjusting mechanism both sides arrange respectively vertical rack and are connected with base, also comprise and be positioned at the middle rotary servovalve motor of adjusting mechanism, the inclination support that makes a circle outside adjusting mechanism, be fixed on and roll the linear servo-actuator on the support side and be distributed in the gravity sensor that rolls on support.Linear servo-actuator and rotary servovalve motor combination are got up and can be realized roll motion, luffing and weaving.Position and the moment of inertia of measurement quality, barycenter, easy to operate simple simultaneously.
It is two-layer that above-mentioned adjusting mechanism is divided into the up and down, two-layer being parallel to each other, and the rotary servovalve motor is distributed with near one deck of support platform and intersects vertical side direction regulation mechanism and vertical adjusting mechanism between two-layer, and the adjusting mechanism plane is equally divided into the quartern.
Also be distributed with displacement transducer and torque sensor on above-mentioned adjusting mechanism, torque sensor be fixed on support platform below.This torque sensor can be used for measuring the moment of support platform three directions, then processes by signal and obtains corresponding moment of inertia.These operations also are provided with corresponding control module, and operation rapidly.
Above-mentioned column has four, and every root post one end is fixed on an angle corresponding to adjusting mechanism, and the other end is fixed on and rolls on support, is distributed with a gravity sensor between every root post and inclination support.By four equally distributed gravity sensors, just can measure quality and the centroid position of testee, measuring accuracy is high.
Be connected by swing bearing between above-mentioned linear servo-actuator upper end and inclination support, the lower end connects by candan universal joint with base.Servomotor can move according to actual needs accordingly, uses more flexible.
Compared with prior art, the beneficial effects of the utility model are: the utility model can be measured the inertia that any given rotating shaft of Objects around A is rotated directly, rapidly and easily, and measuring object can be any irregularly shaped object, and measuring accuracy is high, simple to operation, practical.Also have good user interface, operation, test simple, intuitive, test result are accurately, reliably.Measuring accuracy is high, has very high practical value.
Description of drawings
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the A-A view of Fig. 1.
In figure, Reference numeral is expressed as respectively: 1, support platform; 2, rotary servovalve motor; 3, linear servo-actuator; 4, base; 5, gravity sensor; 6, side direction regulation mechanism; 7, vertical adjusting mechanism; 8, roll support; 9, adjusting mechanism.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further elaborated, the embodiment of this utility model is not limited to this.
Embodiment 1:
As illustrated in fig. 1 and 2, the utility model comprises support platform 1, base 4 and adjusting mechanism 9, also comprises rotary servovalve motor 2, the inclination support 8 that makes a circle in the middle of adjusting mechanism 9 around adjusting mechanism 9 outside, is fixed on and rolls the linear servo-actuator 3 on support 8 sides and be distributed in gravity sensor 5 between inclination support 8 and column.Adjusting mechanism 9 wherein is between support platform 1 and base 4, and adjusting mechanism 9 tops are provided with cup dolly, and described support platform 1 is fixed on cup dolly, and described adjusting mechanism 9 both sides arrange respectively vertical rack and are connected with base 4.Linear servo-actuator 3 upper ends wherein and rolling between support 8 are connected by swing bearing, are connected with base and connect by candan universal joint in the lower end.The column of this embodiment has four, and every root post one end is fixed on an angle of adjusting mechanism 9 correspondences, and the other end is fixed on and rolls on support 8, is distributed with a gravity sensor 5 between every root post and inclination support 8.By the gravity sensor measurement quality, measure centroid position in conjunction with linear servo-actuator.Linear servo-actuator 3 wherein allows carrying platform produce fixing side tilt angle.Pick-up transducers signal under this position is processed by data and is obtained height of center of mass.Be widely used in scientific research, the production fields such as Aeronautics and Astronautics, machinery, motor, have great practical value.
Embodiment 2:
The present embodiment is on the basis of embodiment 1, the concrete structure of preferred adjusting mechanism 9 is as follows: be divided into the up and down two-layer, two-layer being parallel to each other, rotary servovalve motor 2 is between two-layer, be distributed with near one deck of support platform 1 and intersect vertical side direction regulation mechanism 6 and vertical adjusting mechanism 7, adjusting mechanism 9 planes are equally divided into the quartern.Linear servo-actuator can be realized inclination and the luffing of support platform, and the rotary servovalve motor is realized gyration, gathers out by the torque signals of sensor with three kinds of motions, processes obtaining moment of inertia numerical value by computing machine.
Vertical adjusting mechanism of this embodiment is the same with the principle of side direction regulation mechanism, for no other reason than that the adjustment amount difference causes size different.Below only vertical adjusting mechanism is described.Vertically adjusting mechanism comprises two guide rails, a mantle fiber master screw mechanism, a servomotor, a grating scale.Apply driving by servomotor and make the leading screw revolution, move thereby drive screw, screw connects firmly with platform is in the same place, and the moving belt moving platform of screw moves.In conjunction with the signal of grating scale, thereby reaching the control platform, accurately moves by the control servomotor.
Embodiment 3:
Increasing following technical characterictic on the basis of above any one embodiment: also be distributed with displacement transducer and torque sensor on adjusting mechanism 9, torque sensor be fixed on support platform 1 below.Measuring accuracy is high, has very high practical value.
During measurement, testee is placed on support platform, the calculated signals that gathers gravity sensor obtains centre of gravity place, by adjusting mechanism, the revolving shaft of required measurement is adjusted to the tester center, utilizes grating scale to control displacement variable when adjusting with control accuracy.After adjustment is completed, first allow linear servo-actuator drive and produce roll motion, utilize sensor to obtain the moment resulting from sidesway signal, process obtaining rolling moment of inertia by signal.Then utilize the rotary servovalve motor with support platform 90 ° of surface level upper rotaries, same linear servo-actuator drives, process the signal that obtains this moment is pitch rotation inertia.Utilize at last the rotary servovalve motor to produce gyration, gather the torque sensor processing and obtain turning round moment of inertia.
The above is only part embodiment of the present utility model, is not the utility model is done any pro forma restriction, and every any pro forma simple modification and equal variation that does according to the utility model is within all falling into protection domain of the present utility model.
Claims (5)
1. mass property measuring instrument, comprise support platform (1), base (4) and adjusting mechanism (9), described adjusting mechanism (9) is between support platform (1) and base (4), adjusting mechanism (9) top is provided with cup dolly, described support platform (1) is fixed on cup dolly, described adjusting mechanism (9) both sides arrange respectively vertical rack and are connected with base (4), it is characterized in that: also comprise being positioned at the middle rotary servovalve motor (2) of adjusting mechanism (9), the inclination support (8) that makes a circle outside adjusting mechanism (9), be fixed on and roll the linear servo-actuator (3) on support (8) side and be distributed in gravity sensor (5) between inclination support (8) and column.
2. mass property measuring instrument according to claim 1, it is characterized in that: it is two-layer that described adjusting mechanism (9) is divided into the up and down, two-layer being parallel to each other, rotary servovalve motor (2) is between two-layer, be distributed with near one deck of support platform (1) and intersect vertical side direction regulation mechanism (6) and vertical adjusting mechanism (7), adjusting mechanism (9) plane is equally divided into the quartern.
3. mass property measuring instrument according to claim 1, it is characterized in that: described adjusting mechanism also is distributed with displacement transducer and torque sensor on (9), torque sensor be fixed on support platform (1) below.
4. mass property measuring instrument according to claim 1, it is characterized in that: described column has four, every root post one end is fixed on an angle of adjusting mechanism (9) correspondence, the other end is fixed on and rolls on support (8), is distributed with a gravity sensor (5) between every root post and inclination support (8).
5. mass property measuring instrument according to claim 1 is characterized in that: described linear servo-actuator (3) upper end and rolling between support (8) is connected by swing bearing, and the lower end is connected 4 with base) connect by candan universal joint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320024542 CN202994369U (en) | 2013-01-17 | 2013-01-17 | Quality characteristic measuring instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320024542 CN202994369U (en) | 2013-01-17 | 2013-01-17 | Quality characteristic measuring instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202994369U true CN202994369U (en) | 2013-06-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320024542 Expired - Lifetime CN202994369U (en) | 2013-01-17 | 2013-01-17 | Quality characteristic measuring instrument |
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| Country | Link |
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| CN (1) | CN202994369U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103542982A (en) * | 2013-11-14 | 2014-01-29 | 湖南航天机电设备与特种材料研究所 | System for measuring rotational inertia of large structural body |
| CN106153100A (en) * | 2015-03-31 | 2016-11-23 | 孔丹群 | Swinging quality center of mass tester |
| CN107894338A (en) * | 2017-12-12 | 2018-04-10 | 中机科(北京)车辆检测工程研究院有限公司 | Automobile multifunctional testing stand |
-
2013
- 2013-01-17 CN CN 201320024542 patent/CN202994369U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103542982A (en) * | 2013-11-14 | 2014-01-29 | 湖南航天机电设备与特种材料研究所 | System for measuring rotational inertia of large structural body |
| CN103542982B (en) * | 2013-11-14 | 2017-01-04 | 湖南航天机电设备与特种材料研究所 | Large-scale structure body moment of inertia measurement system |
| CN106153100A (en) * | 2015-03-31 | 2016-11-23 | 孔丹群 | Swinging quality center of mass tester |
| CN106153100B (en) * | 2015-03-31 | 2020-05-26 | 南京乾利合科技有限责任公司 | Rotary mass and mass center tester |
| CN107894338A (en) * | 2017-12-12 | 2018-04-10 | 中机科(北京)车辆检测工程研究院有限公司 | Automobile multifunctional testing stand |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130612 |
|
| CX01 | Expiry of patent term |