well, the subject explain my problem by itself...In general terms, i have a land, with cows, lambs...and others...
I want to install an autonomous system to turn On and Off a couple of light posts, basically is a movement or presence dection system, i do know i can detect by infrared or ultrasonic sensores..i dont know if a mix of both in specific conditions...I do not want that the system will be activated by animals. Also, i want to avoid a complex solution like computer vision and/or machine learning systems.
well, the subject explain my problem by itself...In general terms, i have a land, with cows, lambs...and others...
I want to install an autonomous system to turn On and Off a couple of light posts, basically is a movement or presence dection system, i do know i can detect by infrared or ultrasonic sensores..i dont know if a mix of both in specific conditions...I do not want that the system will be activated by animals. Also, i want to avoid a complex solution like computer vision and/or machine learning systems.
Has anyone ideas?
I have read that during the Vietnam war, the enemy could be detected by smell. And it worked for both sides. People do smell different from animals, so investigate that.
You might be able to do something in which the human carries a short-range emitter that is detected by the target lamp posts. Perhaps the lamp post stations would constantly poll for the presence of a radio signal. Bluetooth has about a 300 foot range I think. I don't understand Bluetooth beaconing and how that works, but it's my best suggestion of something to explore.
If you want to filter only humans, how about an MP3 player, amplifier and loudspeaker that shouts "Free iPhones over by the oak tree (feel free to substitute other easily recognisable locations)" every ten minutes?
I guess humans are taller than cows ( unless they stand on their back feet), so you could use a beam break system mounted hi up.
Or maybe train the human to clap his/her hands and detect that .
hammy:
I guess humans are taller than cows ( unless they stand on their back feet), so you could use a beam break system mounted hi up.
Or maybe train the human to clap his/her hands and detect that .
There are pretty small cows and pretty small humans!
set up a cell-phone detector. when some one comes in, you can pick up their cell phone.
if you think they may not have a cell phone, see post #5
You might do what they do in Area-51, use ground disturbance detectors.
the gait (as in walking stride) of a human falls withing a range and other animals fall outside of that range
to focus them to a spot, you could have a gate that stays open.
maybe IR cameras. I see them on the police shows, people show up as white dots.
If you set up a light of whatever kind, detectors of the same kind with a very narrow view can be pointed at the source and go LOW when the light is blocked. If the light flashes at known rate it could not be fooled by shining a steady light on the blocker.
A piezo disk on a spike set in the ground should be able to pick up footstep vibrations with heavy amplification. See youtube "ants amplified". Military versions are dropped from helicopters, the antenna look like scrawny weeds. If you can turn the piezo output into sound then you may id the difference between boot, sneaker and cow hoof -- try recording known actions.
Would a shock fence be enough to tell animal from human? Animals don't carry ground wires or wire cutters? Put the beam break just inside/outside of the fence and detect fence shorts?
If you have an ultrasonic loudspeaker emitting short bursts, any returns differing in frequency signify movement. 1 speaker could be picked up by many mics. Range... suppose it is 360 deg ultrasonic sound at 50W? I think it would carry more than 10 meters.
