Design of a low-cost MRI compatible plantarflexion force measurement device

In this study, a low-cost and adaptable isometric strength measurement and exercise development system are described. The implemented system consists of mechanical structure, force measurement sensor, electronic circuit, and computer software. Isometric-isotonic (via spring resistance) strength analysis and various exercise programs can be applied with the system. The developed system has a lower cost compared to its counterparts in the literature and has a structure that can be adapted to different machines and measuring methods. The operability and reliability of the isometric strength measurement and exercise development system have been proven by calibration tests.

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Ultrasonic measurement of clamping force for injection molding machine

Journal of Polymer Engineering ◽

10.1515/polyeng-2018-0268 ◽

2019 ◽

Vol 39 (4) ◽

pp. 388-396 ◽

Cited By ~ 6

Author(s):

Peng Zhao ◽

Yao Zhao ◽

Jianfeng Zhang ◽

Junye Huang ◽

Neng Xia ◽

...

Keyword(s):

Injection Molding ◽

Measurement Method ◽

Large Scale ◽

Force Measurement ◽

Low Cost ◽

Ultrasonic Method ◽

Injection Molding Process ◽

Propagation Time ◽

Clamping Force ◽

Molding Process

AbstractAn online and feasible clamping force measurement method is important in the injection molding process and equipment. Based on the sono-elasticity theory, anin situclamping force measurement method using ultrasonic technology is proposed in this paper. A mathematical model is established to describe the relationship between the ultrasonic propagation time, mold thickness, and clamping force. A series of experiments are performed to verify the proposed method. Experimental findings show that the measurement results of the proposed method agree well with those of the magnetic enclosed-type clamping force tester method, with difference squares less than 2 (MPa)2and errors bars less than 0.7 MPa. The ultrasonic method can be applied in molds of different thickness, injection molding machines of different clamping scales, and large-scale injection cycles. The proposed method offers advantages of being highly accurate, highly stable, simple, feasible, non-destructive, and low-cost, providing significant application prospects in the injection molding industry.

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Two axial shearing force measurement device with a built-in integrated micro displacement sensor

2014 IEEE Ninth International Conference on Intelligent Sensors, Sensor Networks and Information Processing (ISSNIP) ◽

10.1109/issnip.2014.6827698 ◽

2014 ◽

Cited By ~ 1

Author(s):

Toshihiro Takeshita ◽

Takuma Iwasaki ◽

Kota Harisaki ◽

Renshi Sawada ◽

Hideyuki Ando ◽

...

Keyword(s):

Force Measurement ◽

Displacement Sensor ◽

Shearing Force ◽

Measurement Device

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On observer-based estimation enhancement by parametric amplification in a weak force measurement device

2008 47th IEEE Conference on Decision and Control ◽

10.1109/cdc.2008.4739068 ◽

2008 ◽

Cited By ~ 5

Author(s):

Gildas Besancon ◽

Alina Voda ◽

Marouane Alma

Keyword(s):

Force Measurement ◽

Parametric Amplification ◽

Measurement Device ◽

Weak Force

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Shearing force measurement device with a built-in integrated micro displacement sensor

Sensors and Actuators A Physical ◽

10.1016/j.sna.2014.09.029 ◽

2015 ◽

Vol 221 ◽

pp. 1-8 ◽

Cited By ~ 17

Author(s):

Takuma Iwasaki ◽

Toshihiro Takeshita ◽

Yuji Arinaga ◽

Koji Uemura ◽

Hideyuki Ando ◽

...

Keyword(s):

Force Measurement ◽

Displacement Sensor ◽

Shearing Force ◽

Measurement Device

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Numerical and Experimental Study of Turbulent Flows Around Clark Y-14 Aerofoil

Volume 7A: Fluids Engineering Systems and Technologies ◽

10.1115/imece2015-50536 ◽

2015 ◽

Author(s):

Kshitij Vadake ◽

Jie Cui

Keyword(s):

Fluid Dynamics ◽

Wind Tunnel ◽

Real World ◽

Force Measurement ◽

Test Model ◽

Wind Tunnel Testing ◽

Cfd Simulations ◽

Measurement Device ◽

Tunnel Testing

Experimental Fluid Dynamics (EFD) and Computational Fluid Dynamics (CFD) have been instrumental in Fluid Mechanics to help solve scientific and engineering problems. This research attempts to use both techniques to perform a parametric study of turbulence flow around airfoil ClarkY-14 at various velocity and angle of attack (AoA). Clark Y-14 airfoil was designed in the 1920’s. It demonstrated good overall performance at low and moderate Reynolds numbers. With the progress in the aviation field, its performance was sub-optimal for newer aircraft designs. However, with the advent of RC airplanes and model aircrafts, there is a renewed interest in this airfoil. Various research projects have been conducted using this airfoil, but there hasn’t been a combined EFD and CFD study of the performance characteristics of the airfoil itself, which still finds real world applications today. One important aspect of this research included the investigation of the effects of a Force Measurement Device/Sensor, which is typically used in scaled/full-size wind tunnels to mount the test model as well as measure the forces/moments acting on it during the testing. The presence of such a device could affect the quality of the data obtained from the wind tunnel testing when compared to a real world application scenario where the aforementioned device may not be present. To the best of the author’s knowledge, no detailed study has been published on the effects of such devices. In this study, the results with and without the measuring device were generated by using CFD simulations. The results were then compared to see to what extent the inclusion of these devices will affect the results. The methodology used for this research was experimental as well as computational. In the present research, a commercially available CFD software STAR-CCM+ was employed to simulate the flows around airfoil Clark Y-14. The experimental data was obtained from wind tunnel tests using AEROLAB Educational Wind Tunnel (EWT) and compared with the simulation data from the CFD. The two data sets were in good agreement. Both experimental and simulation results were used to understand the effects of the measurement device/sensor used in the scaled wind tunnel on the lift and drag coefficients of the airfoil. Two separate CFD simulation setups were designed to model the presence and absence of the measurement device/sensor. These setups replicated the wind tunnel setup. The airfoil was tested and simulated at different speeds as well as different AoA. The comparative study gave a useful insight on the accuracy of the CFD simulations in relation to the actual testing. The analysis of results concluded that the force measurement device/sensor had insignificant effects on the accuracy and quality of data collected through wind tunnel testing.

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