Long Range Motion Sensor / Zero Speed
Long Range Motion Sensor / Zero Speed
(OP)
In processing a moving forward hot metal bar (roughly heated at 2000F), I need to identify whether that bar is moving or not. We are currently having a sprocket rolling on the bar, reading the teeth with a solid-state proxy switch. Heat build-up becomes quickly an issue, both for the sensor and mechanicaly.
I am aware that non-contact motion sensors are available, but the detection range is so short (1.5" at most) that I would burn it almost instantly.
I either need a zero speed detector or simply a input, when the bar is moving, that I would treat with my PLC.
Would anyone know of any technology that could enable me to detect that the bar is moving without being to close to it - 24" is safe from radient heat.
Thank you,
I am aware that non-contact motion sensors are available, but the detection range is so short (1.5" at most) that I would burn it almost instantly.
I either need a zero speed detector or simply a input, when the bar is moving, that I would treat with my PLC.
Would anyone know of any technology that could enable me to detect that the bar is moving without being to close to it - 24" is safe from radient heat.
Thank you,





RE: Long Range Motion Sensor / Zero Speed
I think that this is the wrong forum. There is also the "Measurement & control instrumentation engineering" forum, which I think is better for your question.
Have you tried ultrasonic?
Gunnar Englund
www.gke.org
RE: Long Range Motion Sensor / Zero Speed
Keith Cress
Flamin Systems, Inc.- http://www.flaminsystems.com
RE: Long Range Motion Sensor / Zero Speed
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I don't suffer from insanity. I enjoy it...
RE: Long Range Motion Sensor / Zero Speed
Keith Cress
Flamin Systems, Inc.- http://www.flaminsystems.com
RE: Long Range Motion Sensor / Zero Speed
I don't think the spread from microwave or radar will be too bad at 24", although it depends on how big the billet is. I'm kinda envisaging a steelmill application, but the OP could do us a favour and define some more parameters, e.g. target size, atmospheric conditions, speed of movement, etc.
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I don't suffer from insanity. I enjoy it...
RE: Long Range Motion Sensor / Zero Speed
Keith Cress
Flamin Systems, Inc.- http://www.flaminsystems.com
RE: Long Range Motion Sensor / Zero Speed
Forgive me I don't have a clue, what about radar? Would that be practical? Just thought!
http://www.getradar.com/
Chuck
A government which robs Peter to pay Paul
can always depend on the support of Paul.
- George Bernard Shaw
RE: Long Range Motion Sensor / Zero Speed
Keith Cress
Flamin Systems, Inc.- http://www.flaminsystems.com
RE: Long Range Motion Sensor / Zero Speed
What is the range of the motion and of the speed?
How much accuracy do you need ?
What is the size? Any other data you can supply?
Plesae read FAQ240-1032
My WEB: <http://geocities.com/nbucska/>
RE: Long Range Motion Sensor / Zero Speed
try globalspec for data on these kinds of sensors or www.inrpoxsensors.com
RE: Long Range Motion Sensor / Zero Speed
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Sometimes I only open my mouth to swap feet...
RE: Long Range Motion Sensor / Zero Speed
Keyence is not cheap, but they do make some nifty devices for problematic applications.
Best regards,
Afterhrs
RE: Long Range Motion Sensor / Zero Speed
1) Keyence is cheap that is their forte!
2) The OP is talking about something as bright as the sun with respect to infa-red.
Keith Cress
Flamin Systems, Inc.- http://www.flaminsystems.com