Modern Magnetometer for Proton Precession

The small variations in the Earth’s magnetic field are being measured using this proton precession magnetometer (PPM) which detects the ferrous objects on land and at sea.

To map the positions of demolished walls and building in land or to locate wrecked ships for recreational driving at sea, the devices uses the principle of Earth’s filed nuclear magnetic resonance (EFNMR). The data is analyzed using the MCB2130 board as the main board or the engine of the PPM. The overall operation is controlled by the MCB2130 as it digitizes and analyzes the analog output from the main board. the main board consists of a polarizing and switch control, microprocessor, low-noise preamp, bandpass filter, and an optically isolated section. The MCB2130 section contains the digital control and analog out and connects through serial I/O RS232 port.

The sampling of a magnetic field is the responsibility of the onboard LPC2138 microcontroller along with the implementation of an original algorithm for analyzing the signal. To decrease the susceptibility to ambient noise, an advanced data analysis technique is used by this magnetometer. The design of the sensor includes an inductor wound around a bottle of distilled water.

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