Magnetometer for measuring weak electromagnetic fields in the elf band (Machine-translation by Google Translate, not legally binding)

摘要

The invention comprises a system for the measurement of weak electromagnetic fields, in the frequency band comprised between 1 to 100 hz, where signals derived from the natural resonance occurring between the earth and the ionosphere are located, the schumann resonances. The system is composed of a core of ferromagnetic material (1) and a set of separate coils (2), connected by single-line cables (8). A twisted pair cable (3) connects the sensor to an electronic measuring system (4) composed of a differential amplifier (5) to which each twisted pair is coupled, in a coaxial branch with the common meshes (20), (21) ) via coaxial connectors (22), (23) and with output to a digital analog converter (6). The geometry, structure and materials of the system give it its properties of sensitivity and bandwidth. (Machine-translation by Google Translate, not legally binding)