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A three-degree-of-freedom force measuring device and method

A technology of force measuring device and degree of freedom, which is applied in the direction of measuring device, measuring fluid pressure, fluid dynamics test, etc., can solve the problems of not being able to provide simultaneous measurement of multiple forces, affecting the accuracy of measurement, affecting the movement of the model, etc., to achieve enhanced Operational flexibility and stability, reduced measurement errors, and reduced maintenance and upkeep costs

Active Publication Date: 2022-03-29
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing measuring devices are usually installed at the front end of the model or around the model, which will obviously affect the movement of the model, and one device can only measure one kind of force. When multiple forces need to be measured, multiple measuring instruments need to be arranged, which will further affect the measurement the accuracy of
[0003] The advantage of the single-degree-of-freedom force measuring device is that it is simple and intuitive, and easy to implement, but it cannot provide simultaneous measurement of multiple forces
However, in actual measurement, it is necessary to simultaneously measure the force of multiple degrees of freedom. At this time, the superposition of multiple different single-degree-of-freedom force measuring devices will obviously affect the measurement accuracy.
Moreover, multiple force measuring devices arranged in front of and around the model will also significantly affect the movement of the model, resulting in large deviations in results

Method used

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  • A three-degree-of-freedom force measuring device and method
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  • A three-degree-of-freedom force measuring device and method

Examples

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Embodiment 1

[0055] Such as Figure 1-9 Shown is a three-degree-of-freedom force-measuring device in Embodiment 1, which includes a model 10 for measuring force in water, and a power system for providing power for the movement of the model 10 .

[0056] It also includes a rotating structure 30, the rotating structure 30 is T-shaped, the tail end is fixedly connected to the counterweight 33, the head end is rotatably connected to the model 10, the model 10 is connected to the rotating structure 30 through the support rod 20, and the support rod 20 is connected to the rotating structure 30 is the turning center 21; the support rod 20 is rigidly connected to the model 10, and the connection point is located in the middle of the side of the model 10 close to the support rod 20; the connection between the support rod 20 and the rotating structure 30 is a relative rotation connection.

[0057] It also includes sleeves, which are respectively a first sleeve 41 and a second sleeve 42. The first sl...

Embodiment 2

[0069] A three-degree-of-freedom force-measuring method adopts a three-degree-of-freedom force-measuring device of Embodiment 1, comprising the steps of:

[0070] Install a three-degree-of-freedom force measuring device, and zero the lifting force sensor, turning moment sensor and traction force sensor;

[0071] Place the three-degree-of-freedom force measuring device horizontally in the hydrodynamic experiment equipment, start the power system, and start the test;

[0072] The model is pulled by the power system, and the traction sensor is pulled by the rope to generate traction, so that the traction sensor displays a value, and the no-load resistance generated by the test device is measured through repeated tests on the no-load model, and then the numerical data measured by the traction sensor Subtract the no-load resistance value of the device to obtain the traction force on the model;

[0073] The model is affected by water and moves upwards or downwards. With the straight ...

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Abstract

The invention relates to the technical field of hydrodynamic experiment research, and more specifically, to a three-degree-of-freedom force measuring device and method. A three-degree-of-freedom force measuring device, including: a model, used to measure the force in water; a power system, used to provide power for the movement of the model; a rotating structure, a casing and a support connected to each other, and the device also includes a traction force The measurement module is used to measure the traction force on the model, the lifting force measurement module is used to measure the lifting force on the model, and the overturning moment measurement module is used to measure the overturning moment on the model. In the present invention, the three force measuring systems work at the same time during the testing process, so that the three forces received by the model are output at the same time, the synchronization is maintained, the measurement error is reduced, and the testing accuracy is improved.

Description

technical field [0001] The invention relates to the technical field of hydrodynamic experiment research, and more specifically, to a three-degree-of-freedom force measuring device and method. Background technique [0002] In the field of hydrodynamic testing, the device for measuring the force of the model is a necessary device for physical model testing. Measuring devices usually measure the force exerted on the model by means of force sensors. Due to the complexity and accuracy requirements of experimental research, the types of forces that need to be measured are diverse, and the influence of the measurement system on the motion of the model needs to be reduced. Existing measuring devices are usually installed at the front end of the model or around the model, which will obviously affect the movement of the model, and one device can only measure one kind of force. When multiple forces need to be measured, multiple measuring instruments need to be arranged, which will fur...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01L15/00G01M10/00
CPCG01L15/00G01M10/00
Inventor 詹杰民余炜光胡文清陈志涯苏炜李雨田范庆
Owner SUN YAT SEN UNIV