- #1
adamaero
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Homework Statement
Homework Equations
The Attempt at a Solution
I do not understand this last part:
Is this needed? The divide by two is the voltage divider, correct?
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Last edited:
Simple strain gauge in rectifier, last part of the problem
- Thread starter adamaero
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- Gauge Rectifier Strain Strain gauge
In summary, there is a conversation about a homework assignment and a solution that was provided by the professor. The student is unsure about the last part and asks for clarification on the formulas and if there is a circuit diagram available. The student also mentions that there are some problems that are not from the assigned book and some equations in the solution are not found in the book or lecture.
I do not understand this last part:
Is this needed? The divide by two is the voltage divider, correct?
- #2
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If you plug in 1450 x 10^-6 for ΔL/L into the last equation, you do not get the same ΔV as you first figured. Where did you get these formulas? Do you have the circuit diagram. I know these are pretty standard, but it might help
- #3
adamaero
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I guess that's why I don't understand whoever wrote this.scottdave said:
Our professor gave us a solution since the assignment isn't collected. (Among the 50 or so problems, I haven't found errors--but some of the problems are not from our book, and several solution's equations are not in the book or lecture.)scottdave said:
Sorry:
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1. What is a simple strain gauge?
A simple strain gauge is a device used to measure strain or deformation in a material. It consists of a thin wire or foil attached to the material and connected to an electrical circuit. As the material undergoes strain, the wire or foil experiences a change in resistance, which can be measured to determine the strain.
2. How does a strain gauge work in a rectifier circuit?
In a rectifier circuit, a strain gauge is connected in a Wheatstone bridge configuration. As the strain gauge experiences a change in resistance, the balance of the bridge is disrupted, causing a voltage output. This voltage can then be rectified and measured to determine the strain in the material.
3. What is the purpose of using a rectifier in a strain gauge circuit?
The purpose of using a rectifier in a strain gauge circuit is to convert the AC voltage output of the Wheatstone bridge into a DC voltage, which is easier to measure and analyze. This allows for more accurate and consistent measurements of strain in the material.
4. How is the strain calculated using a simple strain gauge in a rectifier circuit?
The strain is calculated by measuring the change in resistance of the strain gauge and using the formula: ε = (ΔR/R) x k, where ε is the strain, ΔR is the change in resistance, R is the initial resistance, and k is the gauge factor which is specific to each strain gauge.
5. What are some common applications of simple strain gauges in rectifier circuits?
Simple strain gauges in rectifier circuits are commonly used in industries such as aerospace, automotive, and civil engineering to measure strain in materials and structures. They are also used in biomechanical research and in the development of new materials.
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