Signal obtaining method and system

A method for signal processing, comprising:

• directing a transmitter to transmit a beam of light to the subject;
• receiving a first signal collected by a first receiver according to a first receiving parameter of the first receiver, the first signal being reflected by the subject in response to the beam of light and at least comprising a photoplethysmograph (PPG) signal relating to the subject and a moving/vibrating signal relating to the subject, wherein the first receiving parameter is used to set a first sensitivity of light intensity of the first receiver and includes at least one of a first resistance, a first current, or a first voltage;
• receiving a second signal collected by a second receiver according to a second receiving parameter of the second receiver, the second signal being reflected by the subject in response to the beam of light and at least comprising the moving/vibrating signal relating to the subject, wherein the second receiving parameter is used to set a second sensitivity of light intensity of the second receiver and includes at least one of a second resistance, a second current, or a second voltage, wherein
• the first receiving parameter of the first receiver is different from the second receiving parameter of the second receiver;
• and
• the first sensitivity of light intensity of the first receiver is different from the second sensitivity of light intensity of the second receiver;
• and
• identifying, according to a signal processing technique, the PPG signal of the subject in the first signal by removing the moving/vibrating signal from the first signal based on the second signal.

A non-transitory computer readable medium comprising a set of instructions, wherein when executed by at least one processor, the set of instructions cause the at least one processor to effectuate a method comprising:

• directing a transmitter to transmit a beam of light to the subject;
• receiving a first signal collected by a first receiver according to a first receiving parameter of the first receiver, the first signal being reflected by the subject in response to the beam of light and at least comprising a photoplethysmograph (PPG) signal relating to the subject and a moving/vibrating signal relating to the subject, wherein the first receiving parameter is used to set a first sensitivity of light intensity of the first receiver and includes at least one of a first resistance, a first current, or a first voltage;
• receiving a second signal collected by a second receiver according to a second receiving parameter of the second receiver, the second signal being reflected by the subject in response to the beam of light and at least comprising the moving/vibrating signal relating to the subject, wherein the second receiving parameter is used to set a second sensitivity of light intensity of the second receiver and includes at least one of a second resistance, a second current, or a second voltage, wherein
• the first receiving parameter of the first receiver is different from the second receiving parameter of the second receiver;
• and
• the first sensitivity of light intensity of the first receiver is different from the second sensitivity of light intensity of the second receiver;
• and
• identifying, according to a signal processing technique, the PPG signal of the subject in the first signal by removing the moving/vibrating signal from the first signal based on the second signal.