Device and method for measuring axial movement of herringbone gear speed reducer

The invention relates to a device and a method for measuring the axial movement of a speed reducer, in particular to a method for measuring the axial movement of a herringbone gear speed reducer. The integrated electric turbine sensors are arranged on an end cover on one side of a gear shaft of the speed reducer, the integrated electric turbine sensors are connected with the data acquisition unit, and a plurality of integrated electric turbine sensors are arranged, are respectively arranged at positions corresponding to the axial direction of the measured part and are spaced from the measured part; when the distance between the measured metal and the sensor probe is changed, the inductance value of a coil in the sensor probe is changed, the oscillating voltage changing along with the distance is changed into the voltage value in direct proportion to the displacement after being subjected to detection, filtering and linear correction, and the distance between the measured metal and the sensor probe is calculat