System laid-out before assembly. |
Carpets are connected to each other with a metal link. This link serves as a reference electrode for differential measurements of each dipole receiver. |
Receiver electronics are connected in sequence from a multiplexer located in the trolley and connect to the flat copper electrodes, pictured here with a blue protective film. |
The transmitter carpet is placed at the end of the sequence of receiver carpets. The Tx electronics are powered by their own battery (shown here on top of the electronics). |
Each receiver dipole is connected to a multiplexer controller in the trolley. The encoder wheel, spare transmitter battery and main battery are also housed in the trolley. |
Once completely assembled, the system is hitched to the back of a car and slowly pulled (ideally 1-2km/h). A laptop computer is used to acquire and store data. |