Author Topic: Two Dimensional EMF detector  (Read 843 times)

0 Members and 1 Guest are viewing this topic.

Offline BrentonSTopic starter

  • Newbie
  • Posts: 2
  • Country: au
Two Dimensional EMF detector
« on: February 05, 2019, 04:42:37 am »
Hi.

I would like to build a device that creates a two-dimensional image of high voltage power lines by detecting the electromagnetic field.
I have an idea how to achieve this, but i'm not sure if it is physically possible.

The 50Hz EMF would be measured with a phased array grid of antenna elements, amplify/filter each element and convert to digital.
Apply calculated delays and sum the elements to "scan" across and down. Display the data by equating signal strength at each point to a range of colours.

Wavelength = speed of light / frequency = 299792 km/s / 50 Hz = 5996km

Is there a lower frequency limit for phased arrays?
As the wavelength of 50Hz is so large, i'm thinking the spacing of the elements would be impractical.
http://www.rfcafe.com/references/electrical/ew-radar-handbook/images/img153.gif

If 50Hz is too low, would it be possible to use this method to detect harmonics within the 50Hz signal?

 


Share me

Digg  Facebook  SlashDot  Delicious  Technorati  Twitter  Google  Yahoo
Smf