Recent content by TTM

Welding is common practice and if done right can give good results.

Some more info: its .25inch OD (.083inch ID nominal), and the thermocouples are welded to the surface. (if you can think of a more robust way of attaching it without introducing more contact resistance, i would be happy to hear) I think we all have a different definition of "working". Sure the...

if you don't mind me asking, how do you come up with this 10C figure?

All thermocouples regardless of type will suffer from decalibration caused by steep temperature gradients, since they all rely on the seebeck effect. A steep temperature gradient will exacerbate any inhomogeneities in that section and give you a drifting measurement. Cost is a big issue...

Within 5C (or 10 even) would put us in a much better place than we are now. Your post did spur me to a closer look at pyrometers, which is generally what high temp manufacturing and PCB industry uses. They come with their fair share of difficulties.. they can give you an accurate surface...

I'm going to guess they don't need a very precise measurement, and if they do, they can afford to design their geometry around these measurements. We must maintain a uniform surface heat flux, so any bulky equipment which disrupts that condition will disrupt the experiment. Trust me, this...

HIGH (800C+) wall temperature measurements - experimental help! Hi All - I'm seeking some advice from any experimentalist types. I'm working on a project analyzing heat transfer properties of exotic fluids. We have a simple experimental setup: laminar flow in a small diameter stainless steel...

Hello, I have a problem for work where I am attempting to integrate (a single) accelerometer readout in order to gain insight into the resulting velocity and position curves with respect to time. From experience I know this is a tricky task due to drift and error being amplified when...

does anyone have an opinion whether a 500g accelerometer is overkill for this application? Should I opt for the more sensitive 100g?

Timmay you have given me some good info which is leading me in the right direction. I've done more research and have decided to go with an impulse hammer and accelerometer combination. Currently I'm pricing everything out from equipment to DAQ and software. This is an academic project and my...

i have always thought building your own propane refrigerator a la "The Mosquito Coast" with Harrison Ford would make for a cool project. This may be stepping into the realm of ChemE however, it does require the use of some mean chemicals.

Thanks timmay, you have provided some good information. Do you have any recommendations on where i could source this hardware? (ie accelerometer, piezo load cell) Omega is pretty expensive and more industrial than what I am looking for. Jameco has one for $60. Do anyone know of any other websites?

A Fourier transform decomposes an arbitrary signal in time space to frequency space. Ok ok i know this is the vague textbook definition, but bear with me. imagine any wave you see in your life - for example on a music player visualizer. (Those little waves that jump according to how the music...

Ok, sorry for the delay. I drew up a quick sketch in paint to show what I am trying to do. http://img24.imageshack.us/img24/411/experimentsetup.jpg The sand box would just be a plastic bin with a small hole for the rod (which is connected to the probe) to stick out. I know there would be drag...

Just my $.02 My first few statics assignments took way too long - similar to what you are describing. I am talking about going in circles, taking 6 hours per assignment. I figured it out real soon I needed some help, and sought tutors help (free at my school.) They honed my problem solving...