Sensors for detecting obstacles in the form of wires?

Question

Do it yourself

Good day.
I had such a question, are there currently sensors that can detect an obstacle in the form of a stretched wire or a cluster of wires? This refers to the wires that make up urban telecommunications, i.e. hanging here and there throughout the city.
This sensor is of interest in the context of the possibility of automating the movement of a helicopter around the city. So that he does not get tangled in these very wires.

Answer 1

Push two rods forward : one up at a certain angle, the other down, pull the cable between them. Fly slowly. When the wire is pulled (the rods will fold) stop the car.

Answer 2

Another option, not so long ago, a photo / video of a copter enclosed in a spherical cage slipped through. Which type and can ride and fly and all that.
As an option. It can get tangled in a bundle of wires (although touch sensors have not been canceled), and a single wire will simply go around and that's it.

Answer 3

You can try to make an electric field sensor. Such things are put on cranes, just so as not to cling to the wires. The detection range, if my memory serves me right, is several meters.
Naturally, he will see only live wires: trolleybus, tram, lighting, power lines. Such a sensor will not react to low current and stretch marks.

Answer 4

What about ultrasonic sensors? See any obstacle. Select the trigger threshold and that's it.
Or tactile sensors, like a cat's whiskers.

Answer 5

Um… The only thing that comes to mind is the location. Either radio frequency or ultrasound. But there is a terrible matan and large research institutes are working on it

Answer 6

Like a metal detector?
Who knows at what distances a compact device can determine, for example, a street constriction cable or a tram cable?

Answer 7

Two video cameras, image comparison, search for “a relatively flat thin line that is slightly higher/left in the other image”, no?