reuteler & cie SA

A coffee preparation apparatus (1) comprising: a receiving section (3) configured to receive coarse pre-ground (PG) green coffee beans (50a); a roasting section (4) comprising a roasting chamber (10) and an air circulator (12) configured to drive heated air, configured to torrefy the PG beans (50a) using the heated air within the roasting chamber (10); a grinding section (5) configured to grind the torrefied PG beans (50c); and a degassing section (6) comprising a vacuum pump (30) configured to remove released gases from the ground torrefied PG beans (50e).

Hall sensor system (1) comprising at least one Hall cell (2a, 2b) and a signal processing circuit (3) comprising a chopper (5), a first channel (A), a second channel (B), a demodulator (6) and a ripple reduction circuit (7), each of the at least one Hall cells (2a, 2b) comprising first and second pairs of contacts defining first and second directions perpendicular to each other for applying bias voltages Vbias, Vtop or bias currents Ibias and sensing Hall voltages V1AC, V1DB, V2AC, V2DB. The chopper (5) is connected to the first and second pairs of contacts of the at least one Hall cells (2a, 2b) and configured to generate a four-phase spinning-current at each of the at least one Hall cells (2a, 2b). The first pair of contacts (c1D, c1B; c2A, c2C) of each of the at least one Hall cells (2a, 2b) is connected to an input (8A) of the first channel (A) for sensing Hall voltages V1DB, V2AC in the first direction during first and third phases of a four-phase spinning-current cycle and the second pair of contacts (c2D, c2B; c1A, c1C) of each of the at least one Hall cells (2a, 2b) is connected to an input (8B) of the second channel (B) for sensing Hall voltages V1AC, V2DB in the second direction during second and fourth phases of the four-phase spinning-current cycle. The demodulator (6) is configured to demodulate the signs of the Hall voltages sensed during the first to fourth phase to provide a demodulated Hall signal and to chronologically combine the demodulated Hall signal to provide an output signal. The ripple reduction circuit (7) comprises a first ripple reduction loop (13A) in the first channel (A) and a second ripple reduction loop (13B) in the second channel (B) configured to at least partially compensate a Hall cell offset based on a subtraction of the demodulated Hall signal of the second channel from the demodulated Hall signal of the first channel.

A current transducer (1) comprises a primary conductor bar (2), a magnetic field sensor (4), and a magnetic circuit core (14) comprising a U-shaped first core part (14a) and a U-shaped second core part (14b), each magnetic core part comprising an upper branch (15a) and a lower branch (15b) connected together by an end branch (15c). The primary conductor bar comprising a sensor orifice (5) extending through the primary conductor bar, the magnetic field sensor positioned in and extending through the sensor orifice, the magnetic field sensor having first and second spaced apart sensing elements (6a, 6b) with a measurement sensitivity direction (S) transverse to the general current flow direction (A). The first sensing element (6a) is positioned within the first airgap and the second sensing element (6b) is positioned within the second airgap.

L'invention concerne un dispositif d'éclairage d'une cible, comprenant : - un support (2) présentant une surface de réception de la cible à illuminer, le support incluant une zone (210) d'éclairement de la cible, le support et/ou pour le moins la zone d'éclairement du support étant d'une couleur déterminée caractérisé par un spectre d'absorption déterminé ; - une armature (3) comprenant un groupe lumineux formé d'une pluralité de sources lumineuses. Selon l'invention, chaque source lumineuse émet un spectre lumineux, dit spectre d'émission, choisi, principalement, dans le spectre d'absorption déterminé.

Current transducer (1) for measuring an alternating current in a conductor, the current transducer comprising an inductor (2) having a first connection point (4a) at a first electric potential corresponding to a first measurement voltage Va with respect to ground and a second connection point (4b) at a second electric potential corresponding to a second measurement voltage Vb with respect to ground, and a processing unit (10) connected to the first and second connection points (4a, 4b) configured to convert an induction voltage induced in the inductor by said alternating current into an output signal of the current transducer representing a measurement of the alternating current. The processing unit (10) comprises a first analog-to-digital converter (30a) connected to the first connection point (4a), a second analog-to-digital converter (30b) connected to the second connection point (4b), and a linearity compensation network (20). The linearity compensation network (20) comprises:a voltage divider (21) connected between the first and second connection points (4a, 4b) and having a mid-point (4c) at a mid-point electric potential (φmid) between the first electric potential and the second electric potential,a subtractor (27) connected to an output of the first analog-to-digital converter (30a) and an output of the second analog-to-digital converter (30b), anda mid-point voltage adjustment unit (23) connected to an output of the subtractor or outputs of the first and second analog-to-digital converters (30a, 30b), and configured to adjust the mid-point electric potential (cpmid) based on the output of the subtractor or the outputs of the first and second analog-to-digital converters (30a, 30b) to maintain absolute values of the first and second measurement voltages Va, Vb greater than an error threshold Th for an alternating current with a peak amplitude smaller than a small amplitude current threshold Th₁.

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Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …