Strain Gage for Measuring Load on Shaft
Hello everybody,
I'm new here, have visited on several occasions and lurked in an effort to learn - but this is my first time posting.
I'm an engineering student working on a project and am working with strain gages for the first time. The project consists of a rotating aluminum shaft (3 mm in diameter, 10 mm in length), with a motor on one end and a variable load at the other (load varies between 0 to 8kg). I'd like to mount a strain gage onto this shaft to be able to measure the load.
The shaft does not rotate continuously, only back and forth within a range of approximately 120 degrees. My thought is to model this problem as a bending load at the end of a shaft and determine the deflection in the aluminum shaft. Doing this, I might be able to spec out a strain gage. My problem is I'm not sure how to use these deflection / stress calculations to determine an appropriate strain gage - I've been looking through the Omega and Vishay catologues. I'm also not sure if it's even reasonable to expect to find a strain gage that is small enough to fit on a 3mm shaft, that has a resolution capable of measuring such small deflections.
Would anyone familiar with Strain Gages be able to provide a little insight / help for a lost student? 😀 Thanks!
I'm new here, have visited on several occasions and lurked in an effort to learn - but this is my first time posting.
I'm an engineering student working on a project and am working with strain gages for the first time. The project consists of a rotating aluminum shaft (3 mm in diameter, 10 mm in length), with a motor on one end and a variable load at the other (load varies between 0 to 8kg). I'd like to mount a strain gage onto this shaft to be able to measure the load.
The shaft does not rotate continuously, only back and forth within a range of approximately 120 degrees. My thought is to model this problem as a bending load at the end of a shaft and determine the deflection in the aluminum shaft. Doing this, I might be able to spec out a strain gage. My problem is I'm not sure how to use these deflection / stress calculations to determine an appropriate strain gage - I've been looking through the Omega and Vishay catologues. I'm also not sure if it's even reasonable to expect to find a strain gage that is small enough to fit on a 3mm shaft, that has a resolution capable of measuring such small deflections.
Would anyone familiar with Strain Gages be able to provide a little insight / help for a lost student? 😀 Thanks!
Replies
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ISHAN TOPREYes tomerez sure,
The strain gauge can be very sensitive even if you have shaft of mentioned dimensions. Can you tell us or show us the photo of strain gauge that you are using? so that people can help you?
You are reading an archived discussion.
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