liam.mccaffrey
|
| posted on 1/1/16 at 09:54 PM |
|
|
Slip Rings-Protyping project
Does anyone have any knowledge of slip rings, specifically mercury contact slip rings for transmitting signal data?
I'm trying to build a test rig for a small scale manufacturing operation and need to monitor a number of sensor outputs on a rotating shaft.
Things I'm looking to investigate?
Units which can tolerate high rpm use up to 10000 rpm. Not sure this is possible so am also looking at gearing reductions also
Up to 4 channels
UK supplier, for the non-company amateur mere mortal experimenter.
Cost obviously.
Can anyone help, cheers
Liam Mc
Build Blog
Build Photo Album
|
|
|
|
|
Alan B
|
| posted on 1/1/16 at 10:06 PM |
|
|
Liam,
dsti.com is a company I've used in the past...very competent....may be of some use.
Alan B
|
|
|
bi22le
|
| posted on 1/1/16 at 11:25 PM |
|
|
Unfortunately i know nothing about your line of investigation, but it sounds interesting. What application is this for? Just curious.
As a R &D engineer one thing i can say are suppliers are more than happy to send free samples and test pieces to you should be able to get things
cheap. I have blagged surprising things from suppliers, the bigger the company the easier the it is
Track days ARE the best thing since sliced bread, until I get a supercharger that is!
Please read my ring story:
http://www.locostbuilders.co.uk/forum/13/viewthread.php?tid=139152&page=1
Me doing a sub 56sec lap around Brands Indy. I need a geo set up! http://www.youtube.com/watch?v=EHksfvIGB3I
|
|
|
02GF74
|
| posted on 2/1/16 at 10:35 AM |
|
|
Presumably sensors give analogue signal and mounted on rotating shaft?
How big is shaft? Possible to mount button cell to power an adc with a small transmitter, i can imagine tbe contacts introducing noise if you are
dealing with small voltages.
Btw what is it you want to measure?
[Edited on 2/1/16 by 02GF74]
|
|
|
v8kid
|
| posted on 2/1/16 at 10:50 AM |
|
|
We have quite strict regulations regarding mercury use in our work due to our H&S interpretation of the regs. Also is you are talking about high
revs that increases the vaporization risk - I would not be brave enough to go down this route!
As already stated can't you use wireless coms?
You'd be surprised how quickly the sales people at B&Q try and assist you after ignoring you for the past 15 minutes when you try and start a
chainsaw
|
|
|
liam.mccaffrey
|
| posted on 2/1/16 at 11:40 AM |
|
|
Vaporised mercury probably not a good thing, wireless would work fine I think?? I'll look into that
Need to measure 2 slowly changing analogue 0-5v signals
Build Blog
Build Photo Album
|
|
|
v8kid
|
| posted on 3/1/16 at 01:28 PM |
|
|
If the signals are changing slowly then you can filter out the noise. Even simply averaging say 20 readings would do that. There are DAQ modules
available that would do the multiple reads and filtering automatically.
I do it on experimental work using Excel of all things and it works OK for infrequent use. The DAQ saves data as csv which I import to Excel in xy
form. For each graph point there are 20 values I ignore the 2 highest and 2 lowest and average the remaining 16 and this gives very repeatable
results. Not necessarily accurate but since they are repeatable they can be used for process control.
Cheers!
You'd be surprised how quickly the sales people at B&Q try and assist you after ignoring you for the past 15 minutes when you try and start a
chainsaw
|
|
|
