The invention discloses a furnace lining detection device of an
induction furnace body. The device comprises furnace body side sensors and further comprises a
control system and a data instrument, wherein the furnace body side sensors are divided into at least two blocks installed in a furnace lining of the
induction furnace body side, the sensors in at least one block are connected in series, the sensors in two blocks are are connected with the
control system and the data instrument through wires, the
control system and the data instrument are arranged outside the
induction furnace body, and signals for feeding back impedance changes are transmitted to the control
system and the data instrument. The control
system comprises a data adjusting
resistor VR1, a filtering circuit RC-L, a data comparison circuit K1-R1, an alarming executing circuit and a power-off protection circuit, and the data adjusting
resistor VR1, the filtering circuit RC-L, the data comparison circuit K1-R1, the alarming executing circuit and the power-off protection circuit are sequentially connected. The detection device is capable of real-time detection and
intelligent control, safe, reliable, low in cost, simple in structure, easy to operate and capable of preventing various potential hazards caused by the phenomenon that high-temperature
molten steel penetrates through a furnace.