Cross-metal-wall embedded type single-port passive burning loss sensing device, monitoring method and preparation method

The invention discloses a cross-metal-wall embedded type single-port passive burning loss sensing device, a monitoring method and a preparation method. The device comprises a passive sensing system and a circuit monitoring system; the passive sensing system comprises a cabin wall composite structure and a circuit monitoring system; a set of in-cabin transducer and a set of out-cabin transducer are respectively mounted on the inner side and the outer side of a metal cabin wall; and the circuit monitoring system is used for emitting an alternating current signal for exciting the in-cabin transducer, monitoring the electrical complex impedance of the cabin wall composite structure fed from the two electrodes of the in-cabin transducer at the same time, obtaining the resonant frequency value of the cabin wall composite structure by measuring the impedance, and judging the on-off condition of a fuse wire according to the deviation condition of the resonant frequency value. According to the cross-metal-wall embedde