Can this diagram be modified?

[sbalio1]

hi all
I have this metal detector pi polones .. When I move the coil on the ground, the settings change each time and the device has a reduced range. Can you provide me with an effective filter to add it to the circuit to avoid this problem? I tried a pi surf and hh2 filter. but that greatly reduces the range. and the metal detection becomes bad so that the coil does not detect the metal if it does not move

[kt315]

ElectroStatic Field Charge-Discharge Influence. ESFCDI. Learn. we discussed that matter billion times.

[sbalio1]

hi kt315
The same problem even if he is in the house. Once the coil changes location, the threshold parameters change

[Andi68]

Reinforced concrete in the house, scrapping in the ground,-the Polones reacts to this

[kt315]

hi kt315
The same problem even if he is in the house. Once the coil changes location, the threshold parameters change

i wrote much times. just you begin to MOVE the coil, regardless you are in home or out,
electrostatic field begins to act.

another case. your coil is unmoving, stationary, lays on a table. you do a test. then NO ESF and no ESFCDI on the coil.
however ESFCDI is in action on your hands (with a coin) because you MOVING YOUR HANDS IN THE EARTH ELECTROSTATIC GLOBAL FIELD.

[kt315]

[kt315]

[sbalio1]

thank you kt315
Is it possible in this case to modify the circuit to avoid this problem, such as adding the filter to the integration input?
Or if the coil is shielded with graphite, this problem can be reduced, especially on the ground, to avoid changing the threshold settings each time ..

[kt315]

you must learn new subject for you - HOW TO PROTECT THE COIL AND ENCLOSURE.
no filters, no modify the circuit, no integration, no your widecolor fantazy here, no your rich delusion.
https://www.geotech1.com/forums/show...coil-shielding

[sbalio1]

Thank you. I had already tried with graphite with a resistance of 700 ohms and 400 ohms per cm, but the detection has been reduced. I will try again with a resistance of 1.5k and 2k.

[kt315]

answer yourself why fabric made detectors are working good but your made are working bad. then try seeking difference between them. you will see a cause.