Strain Gauges Experiment

Masters
Lab Report
Science
Pages 15 (3765 words)
Download 0
This report is on a set of four experiments on two methods of measuring microstrains on strain gauges. The first method is a simple current and voltage one while the second one is a balanced Wheatstone bridge one. The primary objective of the experiments is to determine how accurate measurements can be made of microstrains in strain gauges…

Introduction

It is envisaged that this would be the most efficient method of all.
It must be noted at first that the 3rd method is a recommended on and no actual experiments have been done on it. It has nevertheless been included here because a combination of the Wheatstone bridge and an amplifier is a very efficient method for measuring voltages as the amplifier maximizes it and makes measurement easier. Also occurrence of electrical noise and fluctuations in instrument resolutions can be better revealed by it.
The experimental rig shown in Figure 1 has a cantilever beam with a pair of 120 strain gauges attached one on the upper and one on the lower beam surfaces. The strain-setting device is a bolt with a metric thread.
The purpose of this experiment is to improve the results obtained in experiment 1 by the previous measurement method by using a Wheatstone bridge (Figure 2) that comprises of four nominally identical 120 strain gauges.
Ideally, if the bridge resistors are identical no voltage will be registered at the meter but this is not so practically and a small voltage of about 2 mV is detectable. This is because the resistors are not exactly identical.
The amplifier needs to be able to amplify differential signals of up to about 3mV and produce an output in the range of about 1V to 5V. ...
Download paper
Not exactly what you need?

Related papers

Critical Review on experiment by S.Robinson, S. M. Sandstrom
L-dihydroxyphenylalanine that was restored under the influence of endogenous dopamine in DD mice changed mice behavior. They became hypoactive and hypophagic and could carry out complicated tasks that are impossible to implement without both activation and plasticity. "Additional goal of this study was to separate performance factors from cognitive processes as described by Denenberg, Kim and…
Strain Gauges Experiment
It is envisaged that this would be the most efficient method of all.…
Deflection of a Loaded Cantilever
3) To improve the agreement between the theoretical and measured value following care should be taken : a) LVDT or DTI instrument should accurate and it should be kept at proper place, b) readings should be taken more carefully, c) the measure may be taken in air conditioned lab so as to keep the environmental effects to minimum.
Action Of Enzyme Catalase On Hydrogen Peroxide
The student feels that the more the concentration of the liver the more the enzyme that would result since more amount of oxygen would react with the hydrogen peroxide molecules. For accomplishing this, the student has taken five test tubes with the first test tube having twice the suspension as that of the fifth tube expecting that there would be twice the amount of oxygen given off. This seems…
Pulfrich Effect
Then, the pendulum was tested to be actually moving in a way that it is not moving towards you and away from you but it is actually moving side to side. To test this, the experimenter looked at it on the side, (Figure 1, Person B) and viewed the pendulum if it is moving in a straight path and not in circular manner.…
Smarties Chromatography
The sample candies will be taken from a regular pack of Smarties. The product information detailing the ingredients of the candy will be utilized to reference what chemicals have been used for each of the colors selected.…
Internal Pressure
We will do this by graphing experimental results versus theoretical calculations. We will take into account the error of the measuring system.…