Magnetostrictive liquid level meter using multiple waveguide wires and liquid level measurement method thereof

A magnetostrictive liquid level meter, comprising:

• a holder;
• several measurement units configured to be fixed sequentially to the holder along a lengthwise direction of the holder;
• several waveguide wires configured to be connected with the several measurement units in a one-to-one correspondence mode, wherein each waveguide wire is arranged along the lengthwise direction of the holder, and a tail end of a upper waveguide wire of the several waveguide wires is at least extended to a head end of a lower waveguide wire of the several waveguide wires;
• and
• a magnetic float configured to be sheathed outside the holder, wherein the magnetic float moves up and down along the holder when a liquid level is changed, and one or more waveguide wires are located in a magnetic field formed by the magnetic float;
• wherein the measurement units and the waveguide wires are placed inside of the holder, the measurement units apply excitation pulse signals to the waveguide wires and detect torsional wave pulse signals generated in the waveguide wires, the total measurement range of the magnetostrictive liquid level meter is divided into several small measure ranges, and each measurement unit only performs a measurement of the small measurement range thereof.