Measurement method, system, and related apparatus

A measurement circuit, comprising:

• a first electrode group;
• a second electrode group;
• a second multiplexer;
• a third multiplexer;
• a fourth multiplexer;
• a first electrochemical circuit module;
• an electrocardiography circuit module;
• and
• at least one processor;
• wherein:
• the second multiplexer comprises a third group of input ports, a fourth group of input ports, and a second group of output ports;
• the second multiplexer is configured to connect the third group of input ports or the fourth group of input ports;
• the first electrode group is connected to the third group of input ports, and the first electrode group is connected to the electrocardiography circuit module;
• the second electrode group is connected to the fourth group of input ports, and the second electrode group is connected to the electrocardiography circuit module;
• the third multiplexer and the fourth multiplexer are configured to control the second group of output ports to be connected to the first electrochemical circuit module or the electrocardiography circuit module;
• the at least one processor is connected to the first electrochemical circuit module and the electrocardiography circuit module;
• the first electrode group and the second electrode group are configured to obtain a first electrocardiography signal;
• the first electrode group and the second electrode group are further configured to conduct the first electrocardiography signal to the electrocardiography circuit module when the third multiplexer and the fourth multiplexer control the second group of output ports to be connected to the electrocardiography circuit module;
• the electrocardiography circuit module is configured to determine a second electrocardiography signal based on the first electrocardiography signal;
• and
• the electrocardiography circuit module is further configured to conduct the second electrocardiography signal to the at least one processor.