Perimeter wire detection method

Marico

New member
Hello,
Does anyone know, why ardumower wire detection method is based on detection a inverted/noninverted signal code (which is quite complex and require ADC and digital signal filtering) but non on a much simpler method like signal generation (30-70kHz) and just detecting proximity to it? Does anyone have any experience with such simpler detecting method?
 
Oben