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A b s t r a c t: In this paper, strain gauge based experimental system for displacement measurement of a cantilever
beam was developed. The system comprises strain gauge sensors, signal conditioning module and data acquisition
unit. Two strain gauges installed at the beam surface are connected in Wheatstone half-bridge configuration.
Signal conditi...
Contexts in source publication
Context 1
... conceptual design of the system architec- ture for displacements measurement of a cantilever beam is presented in Figure 1, given by block dia- gram. Whole structure from the proposed system can be divided into 3 main segments. ...
Context 2
... the measurement, the cantilever beam is set in a horizontal position and the masses are converted as acting forces. Figure 9 shows a dia- gram where output voltage V out is measured in rela- tion to the displacements of the beam, while Figure 10 present dependence between voltage V out and the acting forces. From the diagrams it may be noted linear relationship among voltage, force and displacements. ...
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Citations
... The strain gauge displacement sensor is ideal in practice due to its simple structure and low cost. It can be glued on the surfaces of the beams [35]. For detecting the displacement or deformation of the engineering structure, the strain gauge displacement sensor is also adopted. ...
An XYZ compliant micropositioner has been widely mentioned in precision engineering, but the displacements in the X, Y, and Z directions are often not the same. In this study, a design and optimization for a new XYZ micropositioner are developed to obtain three same displacements in three axes. The proposed micropositioner is a planar mechanism whose advantage is a generation of three motions with only two actuators. In the design strategy, the proposed micropositioner is designed by a combination of a symmetrical four-lever displacement amplifier, a symmetrical parallel guiding mechanism, and a symmetrical parallel redirection mechanism. The Z-shaped hinges are used to gain motion in the Z-axis displacement. Four flexure right-circular hinges are combined with two rigid joints and two flexure leaf hinges to permit two large X-and-Y displacements. The symmetrical four-lever displacement amplifier is designed to increase the micropositioner’s travel. The displacement sensor is built by embedding the strain gauges on the hinges of the micropositioner, which is developed to measure the travel of the micropositioner. The behaviors and performances of the micropositioner are modeled by using the Taguchi-based response surface methodology. Additionally, the geometrical factors of the XYZ micropositioner are optimized by teaching–learning-based optimization. The optimized design parameters are defined with an A of 0.9 mm, a B of 0.8 mm, a C of 0.57 mm, and a D of 0.7 mm. The safety factor gains 1.85, while the displacement achieves 515.7278 µm. The developed micropositioner is a potential option for biomedical sample testing in a nanoindentation system.
... For instance, target flow meter measures force exerted by the flowing fluid on a target suspended in the flow stream using strain gauges. Even though the sensitivity of the target to deformation is low due to the complex mechanical structure, it is proven that the strain gauge based measurement is used to find the deflection and provided reasonable accuracy [28], [47]. Therefore, as a subject of future study, for obtaining the deflection of the cantilever strain gauges could be used. ...
Most of the existing flow sensors are expensive and limited in their capabilities for sensing bidirectional flow. Low-cost and accurate flow sensors with bidirectional sensing capability have numerous applications in the residential and irrigation sectors. Evaluation of a low-cost, cantilever-based sensor, suitable for measuring flow rates under turbulent flow conditions is presented in this article. Such sensors are reported for micro-fluidic applications but its potential application in large diameter pipes under turbulent flow has not been studied yet. A cantilever formed using a thin stainless-steel strip is used as the sensing element in the proposed sensor. One of the ends of the cantilever is firmly fitted to the inner wall of the pipe, and it bends or deflects towards the direction of the flow as a function of the flow rate. To experimentally evaluate the sensor in detail, the mean deflection angle of the cantilever is measured using a camera, and an image processing algorithm. In practice, the angle can be sensed using simpler methods. The performance of the prototype sensor has been evaluated after building an appropriate regression model. The results are subsequently expressed in terms of the mean flow velocity, thereby providing its potential utility in pipes of other dimensions. The shape of the mean flow velocity with respect to the mean angle of deflection characteristic of the proposed sensor matched well with the theoretical deflection computed. The sensor developed has given an accuracy of 3 % of full scale, for flow rates in the range of 2–15.5 m
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/hr. The proposed sensing mechanism can realize cost-effective, simple, and reliable flow sensors. Such sensors will find applications in residential and industrial domains.
