A method for the processing of a physical quantity measurement signal by a signal processing unit comprising a clock , characterized in that it includes the following steps: - acquiring the measurement signal by means of a sensor connected to said signal processing unit, said measurement signal being representative of a value of the physical quantity measured, the signal processing unit comprising the clock , a sensor and a non-volatile information storage medium connected to said processing unit ; - processing the measurement signal, said processing corresponding to a reduction of information contained in the measurement signal, so as to obtain a first reduced signal, said first reduced signal representing a digital signature of the measurement signal, wherein said processing of the measurement signal to obtain the digital signature includes the following sub-steps: - sampling the raw measurement signal, i.e. transforming one or more analog signals into one or more digital signals; - digitally filtering the signal sampled at the preceding step to retain the necessary information and suppress any noise; - smoothing the digital filtering results to obtain a smoothed signal; - selecting at least one measurement area, with a measurement exclusion area , identified by comparing the smoothed signal of the preceding step with a signal coming from a database; - storing said first reduced signal processed by the preceding sub-steps with time information in a database and calculating at least one indicator of the quality level of the stored signal, said level being determined by the signal processing unit as a function of the characteristics of the measurement signal. - acquiring the measurement signal by means of a sensor connected to said signal processing unit, said measurement signal being representative of a value of the physical quantity measured, the signal processing unit comprising the clock , a sensor and a non-volatile information storage medium connected to said processing unit ; - processing the measurement signal, said processing corresponding to a reduction of information contained in the measurement signal, so as to obtain a first reduced signal, said first reduced signal representing a digital signature of the measurement signal, wherein said processing of the measurement signal to obtain the digital signature includes the following sub-steps: - sampling the raw measurement signal, i.e. transforming one or more analog signals into one or more digital signals; - digitally filtering the signal sampled at the preceding step to retain the necessary information and suppress any noise; - smoothing the digital filtering results to obtain a smoothed signal; - selecting at least one measurement area, with a measurement exclusion area , identified by comparing the smoothed signal of the preceding step with a signal coming from a database; - storing said first reduced signal processed by the preceding sub-steps with time information in a database and calculating at least one indicator of the quality level of the stored signal, said level being determined by the signal processing unit as a function of the characteristics of the measurement signal. <EOS>