Abstract: A contact state detection apparatus and a wearable device. The contact state detection apparatus includes: a first electrode and a second electrode, the first electrode and the second electrode being configured to receive an alternating current signal and a first signal to output a differential signal, the differential signal including the first signal and a second signal, the first signal being a detection signal of physiological information of a detected object, and the second signal being a signal formed after the alternating current signal is modulated by the first electrode and the second electrode; and a sampling circuit connected to the first electrode and the second electrode, the sampling circuit being configured to sample the differential signal to obtain a target sampling signal, and the target sampling signal including a first sampling signal corresponding to a first signal and a second sampling signal corresponding to the second signal.

Abstract: A wearing detection method, an apparatus, a chip, a device and a storage medium. The method includes: obtaining a first electrical signal of at least one first electrode; obtaining a first optical signal respectively detected by at least one optical detection module, to obtain at least one first optical signal, where the optical detection module includes an optical transmitter and an optical receiver, and the first optical signal is an optical signal received by the optical receiver after being transmitted by the optical transmitter and going through a human body; and judging a worn state of a wearable device according to the first electrical signal and the at least one first optical signal.