Magnetic liquid demonstration instrument and control method thereof

The invention discloses a magnetic liquid demonstration instrument and a control method thereof. The control method comprises the following steps of S1, determining a maximum excitation current duration; S2, windowing and framing input audio signals so as to form a main melody intensity value sequence; S3, obtaining an excitation current duration sequence according to the main melody intensity value sequence; S4, controlling the electromagnetic coil response of the demonstration instrument in real time according to the excitation current duration sequence. The demonstration instrument comprises a transparent container used for containing the magnetic liquid, a plurality of electromagnetic coils distributed along an annular or straight line and used for applying a magnetic field to the magnetic liquid, a music processing and excitation circuit control unit used for controlling the electromagnetic coils, and a lighting unit used for irradiating the fluctuating magnetic liquid. By means of the magnetic liquid de