Method and system for non-invasive vibration-based condition monitoring of a machine

A system for non-invasive vibration-based condition monitoring of a machine and moving parts of the machine, the system comprising:

• a time-domain wideband magnetoresistive sensor having a sensor transfer function of electric resistance versus magnetic field intensity, wherein the broadband magnetoresistive sensor has a broadband response that includes 0 Hz or a DC component,
• a machine comprising a frame and at least one moving part that is located in an interior of the frame and is mechanically coupled to the frame the machine further comprising a magnet attached on an exterior surface of a frame of the machine,
• a time-domain wideband magnetoresistive sensor having a sensor transfer function of electric resistance versus magnetic field intensity, wherein the broadband magnetoresistive sensor has a broadband response that includes 0 Hz or a DC component, the time-domain wideband magnetoresistive sensor being disposed at a location that is external to and mechanically uncoupled from said machine, at a distance from the machine, wherein the magnetoresistive sensor operates in a dynamic part of the sensor transfer function in respect of a magnetic field produced by the magnet;
• and
• an electronic data processor configured for:
• detecting a time-domain magnetic field signal transduced by the magnetoresistive sensor including a broadband response of the magnetoresistive sensor that includes 0 Hz or a DC component, wherein the time-domain magnetic field signal includes first information representing a first movement of the frame of the machine and second information representing a second movement of the at least one moving part;
• and
• processing the captured signal to obtain a vibration-based indicator of the machine's condition;
• extracting from the time-domain magnetic field signal the second information representing the second movement of the at least one moving part;
• and
• determining a condition of the at least one moving part located in the interior of the frame of the machine based on the second information representing the second movement of the at least one moving part.