Slip Ring or other means
Slip Ring or other means
(OP)
Hi..
I'm doing a project which require me to install a pressure transducer in to a rotating shaft..I'm now looking at ways to tap the signal from the transducer on the rotating shaft.
Now currently i'm thinking of using slip ring but the manufacturer of the pressure transducer warn that the "noise" produce by the slip ring may interfer with the performance of the transducer. So need some advise on other means to receive the signal. Thanks for your guildance...
Best Regards,
Yutaini
I'm doing a project which require me to install a pressure transducer in to a rotating shaft..I'm now looking at ways to tap the signal from the transducer on the rotating shaft.
Now currently i'm thinking of using slip ring but the manufacturer of the pressure transducer warn that the "noise" produce by the slip ring may interfer with the performance of the transducer. So need some advise on other means to receive the signal. Thanks for your guildance...
Best Regards,
Yutaini
RE: Slip Ring or other means
A low power radio transmitter might do the trick.
How critcal is the pressure signal you are measuring? A filtering circuit may take out some of the slip ring noise.
Insulating the slip rings and grounding the shaft, via an uninsulated slip ring, or strap arrangement may also help.
Good luck, Dan76
RE: Slip Ring or other means
Your are looking at installing a pt on the rotating device and using the slipring to
a) power the device and
b) transmit the signal.
If you are taliking about a standard sort of industrial 4- 20mA tx with a supply in the order of 24v dc then you must have really shitty slip rings.
How fat is the device turning?
I would imagine the tx would handle the noise of the slip ring. I have used them on slow turnig filter press type appllications with out too much grief. The impedance of those types of devices is relatively low. Typically feeding into a 250 ohm resistor at the PIC or PIA.
If you have a power supply on board the rotating device have a talk to some of the bigger name controls companies - eg Omron, black box Erwin Sick for wireless data systems that would kill the problem no sweat.
let us know how it goes
Don
RE: Slip Ring or other means
This LED/phototransistor "optical slipring" worked great in this exceptionally hot, greasy, dirty and electrically noisy environment. Once every couple of months the gel-cell had to be recharged overnight. Although the energy use was low enough that a solarcell could have been used to charge the battery from factory lights, the peanut oil evaporating off the solder into the air would quicky cloud the cell in this application.
Kevin VanZuilen "KevinVZ"
RE: Slip Ring or other means
RE: Slip Ring or other means
There are double "E" cores, too with |__|__##0##__|__|
cross-section ("O" is the hole in the center ) which
has two concentric channels.
Want a sketch? Send fax# <nbucska@pcperipherals.com>>
Nick