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Which sensor to use for detection of Humans Climbing Poles

davetechnosis

My Use Case

 

Our client is in Power Generation business. There have more than 3000 poles to transfer power from production to power grid. The distance between each pole is 400 meters. Most of the wires are having active current, but the ones at the low level are used for earthing and dont have any power supply.

 

The line passes through remotest areas of India and consequently, the locals cut the Earthing wire (no active current) and sell them in market. Motion detection camera is one of the option but that creates false alarms. I am looking for a sensor where in any human is trying to climb the pole, the camera gets active and takes snap of the user trying to climb.

 

What kind of sensor can be used for this use case? We need to detect it from the proximity of 5 meters.

 

The image of the pole is here: https://blogs-images.forbes.com/stevensalzberg/files/2014/08/670px-power_lines.jpg

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  • It might be easy to establish a capacitive sensing system, but I am not sure they could detect at the 5 m range.

     

    It might be possible to set up a ground grid capacitive sensor, but I am not sure it would be cost effective.

     

    DAB

  • in reply to DAB

    Maybe if a couple of loops of wire were strung around the structure about 4 feet apart, perhaps just above the first cross bar, the capacitance between the loops would indicate when something as big a as a person came near.

    The chip I just road tested would probably work well.

    Cutting these loops could also trigger an alarm.

    Making a big coil inductor around the structure that was part of a resonant circuit or oscillator might work as well. The resonant frequency or oscillation frequency would change when a person was near.

  • in reply to dougw

    .

    I like 's idea. Maybe incorporated with some considered recommendations made by .

    In addition a combination deterrence barrier of sandwiched barbed wire and energised electrical fencing on both sides of the barbed wire around these pylons

    at a height of about 10 metres from ground level with a monitoring unit which will activate an overhead monitored camera as well as a warning sounder loud enough

    to veer off the perpetrator(s) when the barrier system is triggered.

    This way, the would be thieves would be deterred by the electrified barbed wire barrier and if the barrier is being tampered with, the sounder will act in two ways:

    1. one that might drive fear into them and take off;
    2. two, informing them that they have set off and alarm and that consequential action is being activated that will land them in trouble

    Also, the electrified barrier might even stop them in the act.

    The monitored camera will be used to verify and or identify the perpetrator(s) and a decision could be made to dispatch a patrol team or not.

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  • in reply to dougw

    .

    I like 's idea. Maybe incorporated with some considered recommendations made by .

    In addition a combination deterrence barrier of sandwiched barbed wire and energised electrical fencing on both sides of the barbed wire around these pylons

    at a height of about 10 metres from ground level with a monitoring unit which will activate an overhead monitored camera as well as a warning sounder loud enough

    to veer off the perpetrator(s) when the barrier system is triggered.

    This way, the would be thieves would be deterred by the electrified barbed wire barrier and if the barrier is being tampered with, the sounder will act in two ways:

    1. one that might drive fear into them and take off;
    2. two, informing them that they have set off and alarm and that consequential action is being activated that will land them in trouble

    Also, the electrified barrier might even stop them in the act.

    The monitored camera will be used to verify and or identify the perpetrator(s) and a decision could be made to dispatch a patrol team or not.

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