Abstract: A method for data hand-shaking based on EtherCAT protocol is disclosed, the method is implemented by an EtherCAT slave device, and includes: receiving a data packet from a previous device; obtaining self-related data from or inserting feedback data to the data packet for generating a processed packet; transmitting the processed packet to a next device; receiving a returned packet from the next device; transmitting the returned packet to the previous device; performing a packet diversion procedure to at least one of the data packet, the processed packet and the returned packet for generating a backup packet, wherein at least part of the content of the backup packet is identical to the content of the data packet, the processed packet or the returned packet; analyzing the backup packet; and, filtering the backup packet for obtaining designated application data with respect to other EtherCAT slave devices.

Abstract: A method for data hand-shaking based on EtherCAT protocol is disclosed, the method is implemented by an EtherCAT slave device, and includes: receiving a data packet from a previous device; obtaining self-related data from or inserting feedback data to the data packet for generating a processed packet; transmitting the processed packet to a next device; receiving a returned packet from the next device; transmitting the returned packet to the previous device; performing a packet diversion procedure to at least one of the data packet, the processed packet and the returned packet for generating a backup packet, wherein at least part of the content of the backup packet is identical to the content of the data packet, the processed packet or the returned packet; analyzing the backup packet; and, filtering the backup packet for obtaining designated application data with respect to other EtherCAT slave devices.

Abstract: A method and a device for retrieving a breathing signal is disclosed. Firstly, a triaxial acceleration signal is retrieved for a fixed period. Then, multivariate empirical mode decomposition (MEMD) is performed on the triaxial acceleration signal, so as to sequentially obtain a plurality of intrinsic mode functions (IMFs). Finally, an average inclination angle of the triaxial acceleration signal corresponding to each intrinsic mode function is sequentially calculated, and the intrinsic mode function corresponding to the average inclination angle within a predetermined angle range is added to a set. All the intrinsic mode functions are added up to obtain and output a breathing signal when an amount of the intrinsic mode functions in the set equals to a predetermined value being a natural number.