Signal acquisition system

A signal acquisition system, comprising:

• a wearable body;
• a plurality of electrodes fixed on the wearable body and in contact with the skin of a user, wherein the plurality of electrodes include a first electrode set and a second electrode set, the first electrode set is configured to acquire a physiological signal and the second electrode set is configured to acquire a detection signal;
• and
• a processing circuit configured to eliminate, based on the detection signal, motion artifacts in the physiological signal, wherein the processing circuit is configured to:
• obtaining the physiological signal by differentially processing signals acquired by the first electrode set;
• obtaining the detection signal by differentially processing signals acquired by the second electrode set;
• and
• eliminating, based on the detection signal, the motion artifacts in the physiological signal.