Magnetostrictive ultrasonic transducers, magnet assemblies, and related measurement systems

A magnet assembly for a magnetostrictive ultrasonic transducer, the magnet assembly comprising:

• a waveguide;
• a magnet element joined to and extending from the waveguide;
• and
• a magnetostrictive element extending around a portion of the magnet element, offset from the waveguide, the magnetostrictive element joined to the magnet element and comprising tines extending at an acute angle relative to a longitudinal direction of the magnet element.

A measurement system comprising:

• a magnetostrictive ultrasonic transducer comprising:
• a coil assembly configured to transmit and receive signals, the coil assembly comprising:
• a coil bobbin comprising a bore formed therein;
• and
• a radiofrequency coil on the coil bobbin;
• and
• a magnet assembly comprising:
• a magnet element comprising a first end and a second end, the second end configured to be coupled to a wave receiving structure;
• and
• a magnetostrictive element extending around a portion of the magnet element, offset from the second end, and positioned within the bore of the coil bobbin, the magnetostrictive element comprising tines extending at an acute angle relative to a longitudinal direction of the magnet assembly;
• a controller configured to:
• send input signals to the radiofrequency coil to cause the magnetostrictive ultrasonic transducer to generate one or more ultrasonic waves;
• receive output signals from the magnetostrictive ultrasonic transducer;
• and
• process the output signals to determine one or more properties of a fluid or structure.