Recent content by jendrix

Hello, I am working on a project for an EE class and am brushing back up on the basics of strain and stress. My question was to do with how strain works in a material and if it is constant throughout. Say for example you had a setup like this The change in resistance the strain gauge...

Hello, I have been able to speak with my supervisor and have a more complete idea of what the aims should be, although there is still scope to change if the circumstances require it. The reference to a composite material is more to do with the end product which will be an embedded sensor...

I think you are right to be honest, it's hard to gauge the difficulty of some tasks, I do have a mentor at university, I will meet with him again tomorrow and try to get some concrete objectives. I will update then. I was given this case study on embedded sensors as a potential idea...

Hello, So far I have been reading about electrical impedance tomography https://www.sciencedirect.com/science/article/pii/S026635381733186X and have just started to look into fibre optic solutions. The EIT looks promising although it could be a little demanding for a 3rd year project given I...

Hello, I am a 3rd year EEE student and am working on a project that will go on to form my 3rd year dissertation. I am having trouble formulating a project idea from the guidelines. I was told I should use a strain sensor to form some kind of self sensing smart material that could be used to...

Thanks Jim for clearing that up

Hi, I have just been refreshing my theory and was going over a parallel RL circuit, like this one. The site I was reading had this for the total current I tried some values as a test but it doesn't give me the correct answer, for total current. eg if I set V=10V R=2.5ohm jXl=5ohm Then...

Thanks, I like the idea but the device is already mostly built and working off a transformer hence having to come up with a solution with the existing parts. Maybe if I do a version 2 though.

This project isn't working within a set standard as it is a prototype of a home phasor measurement unit. We were told that as it would be designed for domestic use the standard could be a bit lower than those set by the IEEE Std C37.118.1-2011 I was aiming for a 1Hz refresh rate with a +/-1%...

Hello, this is actually for a project, the plan was to incorporate it into a standalone system running from the mains that would send data to a 3rd party. As such I was hoping to run it from the microcontroller. I looked into how some of the old THD analyzers would work and have come up with a...

Could this be done on an Arduino Uno as almost like a proof of concept? So for example only measure the first few harmonics to prove the method works and could be expanded with better equipment? I remember Fourier transform theory but am new to FFT, would this need a library or can it be...

Thanks, it is something I have considered although my programming skills are a bit lacking and I think it may be too complex for me unfortunately.

Hello, I did consider going the DSP route although it is something I haven't worked with much before. I would be using an Arduino Uno which due to limited memory seemed to max out at 128 samples per second when I did some experiments. As far as the transformer goes, this is for a project so any...

Hello, I am working on a project to calculate harmonic distortion on a mains signal. The signal has already been stepped down so it oscillates between 0-5V at 50Hz. I looked into some old THD analyzers and it seemed they would generate a clean signal to mimic the fundamental deduct this from the...

I am still trying to get my head around this. My immediate instinct was that if two waves of differing frequencies experienced a different phase shift then they would be out of phase with each other at the output? Is it because the time period of for example a 10Hz waveform with a phase shift...