Multi-parameter energy efficiency monitoring terminal based on tunnel magnetoresistive chip and energy efficiency evaluation method

The invention discloses a multi-parameter energy efficiency monitoring terminal based on a tunnel magnetoresistive chip and an energy efficiency evaluation method, and the monitoring terminal comprises a signal collection module which is used for receiving a measurement current through a confluence/drainage structure, can convert the form of the measurement current, enables the measurement current to pass through a circuit protection structure, and judges whether an overcurrent occurs or not; inputting the measurement current into a magnetic resistance structure to perform conversion between a magnetic signal and a circuit signal; the measuring voltage is received through the voltage wire inlet end, and the measuring voltage and the voltage coil form a voltage input signal through the circuit protection structure; the processing circuit module is used for performing amplification, filtering, compensation and AD conversion on the signals acquired by the signal acquisition module; and the edge calculation and d