Signal detection method and signal detection device

The embodiment of the invention provides a signal detection method and a signal detection device, and the method comprises the steps: rotating a steering column outer rotor according to a preset direction, and outputting an angle signal; sampling the angle signal to obtain a plurality of angle sampling signals; if the plurality of angle sampling signals accord with a preset angle signal change rule, considering that the output direction of the angle signals is correct; rotating a rotor in the steering column according to a preset direction, and outputting a torque signal duty ratio; sampling the torque signal duty ratio to obtain a plurality of torque sampling signals; and if the plurality of torque sampling signals accord with a preset torque signal change rule, considering that the output direction of the torque signal is correct. According to the signal detection method provided by the invention, the signal output direction of the sensor can be detected, so that the defective product rate is reduced, and t