Airplane wheel speed sensor fault detection device and detection method

The invention discloses an airplane wheel speed sensor fault detection device and a detection method. A pin A of an electric connector is communicated with a power supply output end of a power supply, a pin B is communicated with a signal acquisition end of a square wave generator, and a pin C is communicated with a power supply ground wire of the power supply. A square wave signal output end of the square wave generator is communicated with a positive electrode of a light emitting diode. A negative electrode of the light emitting diode is communicated with one end of a resistor. The other end of the resistor is connected in parallel with a ground wire of the square wave generator and then is communicated with a ground wire of the power supply and a C pin of the electric connector. According to the airplane wheel speed sensor fault detection device, a wheel speed sensor is isolated from a brake system, fault detection of the speed sensor is carried out independently, the forward rotation wave with the frequen