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to the nearest meter perhaps.
and no its no summer fun or student project. its a live industrial project.
its sort of a achievement.
and the pipeline carries oil/crude mostly. so i can't use high powered RF or acoustics
Yes, this is a well established technology for pig detection.crusher said:Is it possible to hear the pig pass a section of pipe (if you "put your ear to the pipe", so to speak)?
How large is the pipe? 433MHz may be too low a frequency to have a wavelength less than twice the pipe diameter. If the wavelength is longer than that, the signal will be severely attenuated.
So, what is wrong with using two fixed detectors at the end of the pipe?
The time between passing the two detectors will give you an estimation of the flow rate (if it is not measured by other means) and from that you can calculate the time to operate the valve, yes?
Yes, this is a well established technology for pig detection.
Look here:
ClampOn
and here:
JimB
that would be a possibility, but how many of those 'listeners' would i need to install? that would be just like adding more stationary pig indicators.