Real-time fault distinguishing circuit and distinguishing method for potentiometer type angle sensor

The invention provides a potentiometer type corner sensor real-time fault discrimination circuit and discrimination method. The potentiometer type corner sensor real-time fault discrimination circuit comprises a potentiometer VR, a bias resistor Rtest and a single-chip microcomputer U, wherein the single-chip microcomputer U comprises an analog-to-digital converter ADC and an IO port end with push-pull output and high-resistance input functions; the upper end of the potentiometer VR is connected with the positive end X of the reference voltage Vref, and the lower end is connected with the reference ground D. The electric brush is connected with the positive end of the output voltage Vx. One end of the bias resistor Rtest is connected to the brush end of the potentiometer VR, and the other end of the bias resistor Rtest is connected to the node A; the power supply voltage VCC end of the single-chip microcomputer U is connected with the positive electrode end X of the reference voltage Vref, the input analog qu