CN114061833A - centroid measurement air balance - Google Patents

Abstract

Translated fromChinese

本发明公开了质心测量气浮天平，包括大理石底座，所述大理石底座上设置有球面气浮轴承，所述球面气浮轴承上设置有法兰台面，所述法兰台面下端面一侧固定连接有力矩杠杆，所述力矩杠杆的另一端安装有测力传感器和非接触式水平度测量装置，所述力矩杠杆与测力传感器之间安装有水平调节装置。本发明中，通过非接触式水平度测量装置测得力矩杠杆的角度，并通过水平调节装置将力矩杠杆调节到水平位置，再测力传感器测出支撑力，从而得到偏心力矩，测量出试件的质心，相比于传统的质心测量方式，大大提高了测量精度。

The invention discloses an air-floating balance for measuring the center of mass, comprising a marble base, a spherical air-floating bearing is arranged on the marble base, a flange table is arranged on the spherical air-bearing, and one side of the lower end surface of the flange table is fixedly connected There is a moment lever, the other end of the moment lever is installed with a load cell and a non-contact levelness measuring device, and a level adjustment device is installed between the moment lever and the load cell. In the present invention, the angle of the moment lever is measured by the non-contact levelness measuring device, and the moment lever is adjusted to the horizontal position by the level adjusting device, and the supporting force is measured by the force measurement sensor, so as to obtain the eccentric moment, and the test piece is measured. Compared with the traditional centroid measurement method, the measurement accuracy is greatly improved.

Description

Centroid measurement air-float balance

Technical Field

The invention relates to the technical field of mass characteristic measurement, in particular to a centroid measurement air-floating balance.

Background

At present, three-point force measuring methods and mechanical knife edge balance methods are mainly used for measuring the mass center of a test piece. The three-point force measuring method is limited by the fact that the sensor has the functions of bearing and measuring at the same time, in order to guarantee larger bearing capacity, the measuring range of the sensor must be correspondingly improved, the absolute accuracy of the sensor is inevitably reduced, and the measuring accuracy of the mass center cannot be improved. The mechanical knife edge type balance has mechanical friction damping, and a mechanical knife edge is easy to damage and cannot ensure high measurement precision.

Therefore, there is a need for a technique capable of ensuring both a large load capacity and high measurement accuracy.

Disclosure of Invention

The invention aims to: in order to solve the problems, the center of mass measurement air-float balance is provided.

In order to achieve the purpose, the invention adopts the following technical scheme:

centroid measurement air supporting balance, including the marble base, be provided with sphere air supporting bearing on the marble base, be provided with the flange mesa on the sphere air supporting bearing, terminal surface one side fixedly connected with moment lever under the flange mesa, force cell sensor and non-contact levelness measuring device are installed to the other end of moment lever, install horizontal adjusting device between moment lever and the force cell sensor.

Preferably, the spherical air bearing comprises a bearing stator and a bearing rotor, the bearing stator is fixedly connected with the marble base, the bearing rotor is movably connected with the bearing stator, and the upper end face of the bearing rotor is fixedly connected with the flange table face.

Preferably, the flange table is provided with a central positioning pin hole and an image limiting pin hole.

Preferably, the level adjustment device is a fine adjustment screw.

Preferably, the load cell is electrically connected to an instrument, and the instrument is electrically connected to a computer.

In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:

in this application, survey the angle of moment lever through non-contact levelness measuring device to adjust the horizontal position with the moment lever through horizontal adjusting device, survey force transducer again and measure the holding power, thereby obtain eccentric moment, measure the barycenter of test piece, compare in traditional barycenter measurement mode, improved measurement accuracy greatly.

Drawings

Fig. 1 shows a schematic structural diagram of a centroid measuring air-floating balance provided according to an embodiment of the invention.

Illustration of the drawings:

1. a marble base; 2. a non-contact levelness measuring device; 3. a force sensor; 4. a leveling device; 5. a torque lever; 6. a flange table-board; 7. a spherical air bearing; 71. a bearing stator; 72. and a bearing mover.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1, the present invention provides a technical solution:

the centroid measurement air-flotation balance comprises a marble base 1, wherein a spherical air-flotation bearing 7 is arranged on the marble base 1, a flange table top 6 is arranged on the spherical air-flotation bearing 7 and used for placing a test piece, amoment lever 5 is fixedly connected to one side of the lower end face of the flange table top 6, aforce measuring sensor 3 and a non-contactlevelness measuring device 2 are installed at the other end of themoment lever 5, and a horizontal adjusting device 4 is installed between themoment lever 5 and theforce measuring sensor 3 and used for adjusting the angle of themoment lever 5.

Specifically, as shown in fig. 1, the spherical air bearing 7 includes abearing stator 71 and a bearing mover 72, thebearing stator 71 is fixedly connected to the marble base 1, the bearing mover 72 is movably connected to thebearing stator 71, an upper end surface of the bearing mover 72 is fixedly connected to the flange table 6, and thebearing stator 71 can supply compressed air to form an air film between the bearing mover 72 and thebearing stator 71, so as to realize 360-degree frictionless rotation of the flange table 6.

Specifically, as shown in fig. 1, a central positioning pin hole and a quadrant positioning pin hole are formed in the flange table 6 and used for being matched with a fixing pin to fix a test piece.

Specifically, as shown in fig. 1, the level adjusting device 4 is a fine adjustment screw rod, and is matched with the non-contact levelness measuringdevice 2 to ensure the level of the flange table top 6.

Specifically, as shown in fig. 1, theload cell 3 is electrically connected to an instrument, the instrument is electrically connected to a computer, the computer is equipped with test software, and the supporting force is measured by theload cell 3 and transmitted to the computer, so as to calculate the eccentric moment.

In conclusion, the centroid measurement air-float balance provided by the embodiment fixes the test piece on the flange table top 6, measures the angle of themoment lever 5 through the non-contactlevelness measuring device 2, adjusts themoment lever 5 to the horizontal position through the horizontal adjusting device 4, measures the supporting force through theforce measuring sensor 3, obtains the eccentric moment, measures the centroid of the test piece, and compared with the traditional centroid measurement mode, the centroid measurement precision is greatly improved.

The previous description of the embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (5)

1. Centroid measurement air-float balance, including marble base (1), its characterized in that, be provided with sphere air-float bearing (7) on marble base (1), be provided with flange mesa (6) on sphere air-float bearing (7), terminal surface one side fixedly connected with moment lever (5) under flange mesa (6), force cell sensor (3) and non-contact levelness measuring device (2) are installed to the other end of moment lever (5), install leveling device (4) between moment lever (5) and force cell sensor (3).

2. The centroid measuring air-floating balance according to claim 1, wherein the spherical air-floating bearing (7) comprises a bearing stator (71) and a bearing rotor (72), the bearing stator (71) is fixedly connected with the marble base (1), the bearing rotor (72) is movably connected with the bearing stator (71), and the upper end face of the bearing rotor (72) is fixedly connected with the flange table top (6).

3. Centroid measuring air-floating balance according to claim 1, characterized in that said flange table top (6) is provided with a central positioning pin hole and an image defining pin hole.

4. Centroid measuring air-floating balance according to claim 1, characterized in that the level adjustment means (4) is a fine adjustment screw.

5. The centroid measuring air-floating balance according to claim 1, wherein the load cell (3) is electrically connected with a meter, and the meter is electrically connected with a computer.

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