Abstract: A method for measuring a DC voltage such as the voltage Vbat of a motor vehicle battery, according to which the voltage Vbat is converted into a digital value Nbat by an analog-to-digital converter (3) with which a reference voltage Vref is associated. A standard voltage Vo coming from a standard voltage source (11) is, furthermore, delivered regularly to the analog-to-digital converter, and the voltage Vo is converted into a digital value Nvo, then a digital value Ncor representing the value of the voltage Vbat is computed, such that Ncor=Co×(Nbat/Nvo), where Co=Ncor_max×(2N/Vbat_max)×(Vo/Vref), Ncor_max being a value selected for coding the maximum value of Ncor, Nbat_max a digital value resulting from the conversion of the maximum voltage Vbat_max to be measured, and N the number of bits of the analog-to-digital converter.

Abstract: Measurement system and procedure suitable for measuring a voltage differential, the system comprising a measurement unit (1) having a first ground (10) as voltage reference and comprising a microcontroller (7) with an analog-digital converter (5), a sensor (2) having a second ground (20) as voltage reference, said second ground (20) being able to exhibit a potential difference with respect to the first ground (10), said measurement unit (1) having a first input (11) connected directly to the signal output (21) of the sensor (2), and a second input (12) connected directly to said second ground (20), the first and second inputs (11, 12) being linked to digital inputs (61, 62) of the microcontroller (7) through circuits for conditioning (31, 32, 41, 42) and analog-digital conversion (51, 52).

Abstract: A method for measuring a DC voltage such as the voltage Vbat of a motor vehicle battery, according to which the voltage Vbat is converted into a digital value Nbat by an analog-to-digital converter (3) with which a reference voltage Vref is associated. A standard voltage Vo coming from a standard voltage source (11) is, furthermore, delivered regularly to the analogue-to-digital converter, and the voltage Vo is converted into a digital value Nvo, then a digital value Ncor representing the value of the voltage Vbat is computed, such that Ncor=Co×(Nbat/Nvo), where Co=Ncor_max×(2N/Vbat_max)×(Vo/Vref), Ncor_max being a value selected for coding the maximum value of Ncor, Nbat_max a digital value resulting from the conversion of the maximum voltage Vbat_max to be measured, and N the number of bits of the analog-to-digital converter.

Abstract: Measurement system and procedure suitable for measuring a voltage differential, the system comprising a measurement unit (1) having a first ground (10) as voltage reference and comprising a microcontroller (7) with an analog-digital converter (5), a sensor (2) having a second ground (20) as voltage reference, said second ground (20) being able to exhibit a potential difference with respect to the first ground (10), said measurement unit (1) having a first input (11) connected directly to the signal output (21) of the sensor (2), and a second input (12) connected directly to said second ground (20), the first and second inputs (11, 12) being linked to digital inputs (61, 62) of the microcontroller (7) through circuits for conditioning (31, 32, 41, 42) and analog-digital conversion (51, 52).