Abstract: The invention relates to a control method of a measurement supplied by a first turbomachine sensor (20), by means of a first channel (3), and by a second turbomachine sensor (22), by means of a second communication channel (4), and also comprising the steps of: acquisition of a first signal from the first communication channel (3), and of a second signal from the second communication channel (4), determination of a validity status of each of the acquired signals, and transmission of a signal to be processed.

Abstract: A method of detecting a fault of a switching electricity source having a control stage responsive to a setpoint signal to deliver a control signal that is modulated with a predetermined duty ratio (?) to a power stage that is to deliver electricity to a load. The method includes the steps of: determining at least one nominal value (?min, ?max) for the duty ratio for normal operation, and at least one fault threshold (?SC, ?OC) as a function of the nominal value; determining at least one instantaneous value (?) of the duty ratio of the signal issued by the control stage; and comparing the instantaneous value with the fault threshold. A detection circuit implementing the method is also provided.

Abstract: A method of detecting a fault of a frequency sensor having a bias resistor and associated with a rotary member. The following steps are performed while the rotary member is stationary: injecting into the bias resistor of the sensor inverted alternating signals (S1, S2) comprising at least one first alternation (A1) and at least one second alternation (A2), the first alternation being of amplitude greater than the amplitude of the second alternation; and detecting a frequency of an output signal (S?) from the sensor. A measurement circuit implementing the method is also provided.

Abstract: A circuit for exciting at least one DC sensor is provided in which the circuit has a digital regulation controller connected to a main system and to a regulation loop. The main system has a DAC connected to the sensor via a non-inverted amplified path and via an inverted amplified path in order to send sensor excitation signals including a DC component in differential mode. The regulation system includes an ADC connected to the amplified paths. The circuit includes a monitoring system that is connected to the controller in parallel with the converter in order to send signals as a function of an AC component of the signals taken from the amplified paths. The digital controller is arranged to inject a sinewave in common mode into the excitation signals and to analyze signals output by the monitoring system and signals output by the ADC.

Abstract: A method of detecting a fault of a switching electricity source having a control stage responsive to a setpoint signal to deliver a control signal that is modulated with a predetermined duty ratio (?) to a power stage that is to deliver electricity to a load. The method includes the steps of: determining at least one nominal value (?min, ?max) for the duty ratio for normal operation, and at least one fault threshold (?SC, ?OC) as a function of the nominal value; determining at least one instantaneous value (?) of the duty ratio of the signal issued by the control stage; and comparing the instantaneous value with the fault threshold. A detection circuit implementing the method is also provided.

Abstract: A method of detecting a fault of a frequency sensor having a bias resistor and associated with a rotary member. The following steps are performed while the rotary member is stationary: injecting into the bias resistor of the sensor inverted alternating signals (S1, S2) comprising at least one first alternation (A1) and at least one second alternation (A2), the first alternation being of amplitude greater than the amplitude of the second alternation; and detecting a frequency of an output signal (S?) from the sensor. A measurement circuit implementing the method is also provided.

Abstract: A circuit for exciting at least one DC sensor is provided in which the circuit has a digital regulation controller connected to a main system and to a regulation loop. The main system has a DAC connected to the sensor via a non-inverted amplified path and via an inverted amplified path in order to send sensor excitation signals including a DC component in differential mode. The regulation system includes an ADC connected to the amplified paths. The circuit includes a monitoring system that is connected to the controller in parallel with the converter in order to send signals as a function of an AC component of the signals taken from the amplified paths. The digital controller is arranged to inject a sinewave in common mode into the excitation signals and to analyze signals output by the monitoring system and signals output by the ADC.