Slip Ring Thermistor
Slip Ring Thermistor
(OP)
Has anyone connected a thermistor to a slip ring? I initially tried using a thermocouple but since there is a change in metals going through the slip ring unwanted emf voltages were generated which were dependent upon ambient air. My next thoughts were to try a thermistor or RTD and Wheatstone Bridge. If anyone has done this before and could lend some advice that would be great.





RE: Slip Ring Thermistor
RE: Slip Ring Thermistor
Thanks for the advice about amplifying the signal, I will look into it. Due to space constraints there would not be room to place a battery powered device anywhere on the rotating device. It is inside of a fractional horsepower electric motor.
RE: Slip Ring Thermistor
Engineering is the art of creating things you need, from things you can get.
RE: Slip Ring Thermistor
Mike Halloran
Pembroke Pines, FL, USA
RE: Slip Ring Thermistor
RE: Slip Ring Thermistor
RE: Slip Ring Thermistor
RE: Slip Ring Thermistor
I suggest that you readup on the basics of IR temperature measurement.
RE: Slip Ring Thermistor
I suggest that you readup on the basics of IR temperature measurement."
What are you suggesting is wrong with that statement?
RE: Slip Ring Thermistor
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RE: Slip Ring Thermistor
RE: Slip Ring Thermistor
Basically, you correct for the emissivity. Black body radiation is not manditory, but given that you do have a difficult measurment, you can expect to spend time and money to make a traceable measurement.
RE: Slip Ring Thermistor
RE: Slip Ring Thermistor
You measurement requirements are so generalized as defy any specific answers.
For example,
1. Basis or evidence for even requiring measurement of the temperature real time.
2. Temperature range and accuracy requirements.
3. Response time requirements.
4. Applied voltages (to the slip ring) relative to ground or neutral.
5. Space limitations.
6. Atmosphere (air, inert gas, etc.)
7. Time frame in which you need to resolve your measurement design, and test, etc.
8. Traceability requirements (NIST, or some other agency).
9. Physical design of the slip rings and layout, etc.
Without addressing such issues, you can only expect the sort of answers you might expect at you local garden club.