Abstract: An autonomous device for measuring at least one characteristic of a fluid circulating in a conduit in a flow direction comprises a permanent magnetic field source, a magneto-electric converter and a processing circuit capable of using the electric charges supplied by the converter to supply a measurement of a characteristic of its environment. The source and the converter are placed in a stator and a rotor forming the device. The autonomous device further comprises attachment means allowing the stator to be fixedly placed in the conduit or at one end of the conduit, in a configuration in which the axis of rotation of the rotor is parallel to the flow direction. A control system may employ at least one such autonomous device.

Abstract: An autonomous device for measuring at least one characteristic of a fluid circulating in a conduit in a flow direction comprises a permanent magnetic field source, a magneto-electric converter and a processing circuit capable of using the electric charges supplied by the converter to supply a measurement of a characteristic of its environment. The source and the converter are placed in a stator and a rotor forming the device. The autonomous device further comprises attachment means allowing the stator to be fixedly placed in the conduit or at one end of the conduit, in a configuration in which the axis of rotation of the rotor is parallel to the flow direction. A control system may employ at least one such autonomous device.

Abstract: A generator for transforming a translational movement of a push element into an accumulation of electric charges comprises a converter capable of transforming a magnetic field variation into a charge accumulation, and a magnetic field source defining a housing in which a magnetic field prevails. The push element is movable from a first position to a second position along a translational direction. According to a first aspect, the generator comprises a transmission device for transmitting the movement of the push element into a rotational movement of the field source or of the converter in order to vary the magnetic field in the reference plane of the converter. According to another aspect, the push element is moved from a first position in which the converter is subject to a first field configuration, to a second position in which the converter is subject to a second field configuration, different from the first.