Patent ID: 9267855
Filing Date: 2016-02-23
CPC Classification: G01L,G01P

Claim Text:
1. A method for determining a torque and/or a rotational speed of a rotating shaft, with one or more wheels provided with teeth, each wheel being integral with a point of the shaft, a sensor configured to generate a pulse of an analog signal each time a tooth passes in front of the sensor; the method comprising: generating a first and a second analog signal with the sensor, the second analog signal being offset in time with respect to the first analog signal, the second analog signal having a duration equal to a duration of the first analog signal; converting the first and the second analog signal into a first and a second digital signal; calculating a temporal cross-correlation function of the first digital signal with the second digital signal; and calculating a duration between two pulses of the first analog signal with the cross-correlation function, wherein calculating the duration between two pulses comprises