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In-situ calibration device and method for measuring micro pneumatic force air floatation platform

An air-floating platform and in-situ calibration technology, which is used in measurement devices, force/torque/work measurement instrument calibration/testing, aerodynamic tests, etc. accuracy, reliability, and reliability

Pending Publication Date: 2021-05-04
CHINA ACAD OF AEROSPACE AERODYNAMICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during the ground commissioning, it was found that when the calibrated platform is changed to another position, the accuracy of the load cell output will be greatly affected by factors such as the flatness of the ground and the installation status of the platform.

Method used

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  • In-situ calibration device and method for measuring micro pneumatic force air floatation platform
  • In-situ calibration device and method for measuring micro pneumatic force air floatation platform
  • In-situ calibration device and method for measuring micro pneumatic force air floatation platform

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0034] The present invention will be further elaborated below in conjunction with embodiment.

[0035] Before the test, the air buoyancy force measuring platform (also known as the air buoyancy platform / force measuring platform) can be calibrated in situ after the working position in the wind tunnel is adjusted and can work normally. The relationship between the output signal of the force measuring platform and the actual load is obtained by in-situ calibration. Select a suitable location on the force measuring platform to install the calibration piece, and connect the calibration piece to the model to provide a standard load for the load-bearing model in the force measuring platform. When calibrating, adjust the load size of the calibration parts in different positions, and design a suitable loading scheme. The load provided by the calibration piece to the model is a tensile load.

[0036] An in-situ calibration device for measuring a micro-aerodynamic air-floating platform...

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PUM

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Abstract

The invention relates to an in-situ calibration device and method for measuring a micro aerodynamic force air floating platform. The device comprises a load bearing model and at least four calibration parts; the load bearing model is mounted on an air floating platform to be calibrated and is in a free state in the horizontal direction relative to the air floating plane; the at least four calibration pieces are mounted on the air floating platform, can apply load forces in different directions to the load bearing model, and are used for simulating the axial force, the lateral force and the yawing moment of the aerodynamic load borne by the model; and a tension sensor is installed between the load bearing model and the air floating platform in the direction corresponding to the load force. The signal-torque relation is obtained in an in-situ calibration mode, additional system errors are not introduced, and the accuracy of the force measuring platform is guaranteed.

Description

technical field [0001] The invention relates to an in-situ calibration device for a force-measuring platform in a low-speed wind tunnel test, in particular to an in-situ calibration device for measuring a micro aerodynamic air-flotation force-measuring platform. Background technique [0002] The performance gap between high-level athletes in today's racing sports is sometimes only on the order of milliseconds. In many sports such as rowing and bobsleigh competitions, although the air resistance suffered by sports equipment and athletes is relatively small compared to other resistances, it still has a non-negligible impact on athletic performance. In addition to applying nutrition, sports science and other related disciplines to improve athletes' physical fitness and technical level, measuring the resistance by means of scientific experiments can provide theoretical basis and data support for optimizing the shape of equipment, guiding athletes' training and competitive moveme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M9/06G01L25/00
CPCG01M9/06G01L25/00
Inventor 张家宝郑芳贾毅张秋实黄浩李向征陆伟刘泓彬
Owner CHINA ACAD OF AEROSPACE AERODYNAMICS
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