Phase compensation circuit, magnetic induction imaging device and phase compensation method

A phase compensation method applied to a phase compensation circuit, the phase compensation circuit comprising:

• providing a phase difference voltage detection module, a compensation voltage adjustment module, and a compensation module, wherein:
• the phase difference voltage detection module is connected to a detection signal input terminal, a reference signal input terminal and a phase difference voltage output terminal, the phase difference voltage output terminal is coupled to the compensation module, and the phase difference voltage detection module is configured to process an inputted detection signal and an inputted reference signal, calculate a magnitude ratio of the processed detection signal and reference signal or a phase difference of the processed detection signal and reference signal, and then output a first phase difference voltage signal according to the amplitude ratio or the phase difference;
• and
• the compensation voltage adjustment module is connected to a voltage input terminal and a compensation voltage output terminal, the compensation voltage output terminal is coupled to the compensation module, and the compensation voltage adjustment module is configured to collect an ambient temperature parameter, determine a first compensation voltage corresponding to the ambient temperature parameter according to a corresponding relationship between a preset temperature parameter and a compensation voltage, perform voltage division on a voltage value inputted from the voltage input terminal according to the first compensation voltage, and output a compensation voltage signal;
• and the compensation module is configured to compensate for the first phase difference voltage signal according to the compensation voltage signal, and output a second phase difference voltage signal,
• inputting a detection signal to a detection signal input terminal, a reference signal to a reference signal input terminal, and a voltage value to a voltage input terminal, respectively;
• determining a phase difference voltage signal based on an amplitude ratio of or a phase difference between the detection signal and the reference signal;
• collecting an ambient temperature parameter;
• determining a first compensation voltage corresponding to the ambient temperature parameter according to a correspondence relationship between a preset temperature parameter and a compensation voltage;
• performing voltage division on the voltage value according to the first compensation voltage to output a compensation voltage signal;
• and
• performing phase compensation on the phase difference voltage signal according to the compensation voltage signal.