Turbine engine comprising a means for measuring the speed and torque of a shaft of the turbine engine and method for monitoring said shaft

Turbine engine, in particular for an aircraft, comprising at least one axial shaft rotatably mounted in a casing of the turbine engine, the turbine engine comprising:

• an annular reference part which is rigidly connected to a first portion of the shaft of the turbine engine, the reference part comprising short and long longitudinal reference teeth;
• first means for detecting the passage of the short and long reference teeth in a first transverse plane so as to measure the speed of the shaft of the turbine engine about its axis;
• an annular measurement part which is rigidly connected to a second portion (A2) of the shaft of the turbine engine which is remote from said first portion, the measurement part comprising longitudinal measurement teeth;
• and
• second means for detecting the passage of the long reference teeth and the measurement teeth in a second transverse plane so as to measure the torque of the shaft of the turbine engine.