Abstract: A method for counting and for determining the position of people in a room, the method including: activating a thermal imager; the thermal imager capturing a raw thermal image of a scene included in the room; deactivating the thermal imager; after deactivating the thermal imager, acquiring a calibrated thermal image of the scene from the raw thermal image; comparing the calibrated thermal image of the scene with another calibrated thermal image of the scene acquired beforehand; and acquiring the number of people and the position of the people in the room.

Abstract: A method for obtaining the position of a person in a space of a building via a thermal imager including a wide-angle lens, the method including: acquiring, with the thermal imager, through its wide-angle lens, a deformed thermal image of a scene including the person, the deformed thermal image including a hot zone corresponding to the person present in the scene; extracting a region of interest corresponding to the person from the deformed thermal image using an algorithm; determining the position of the region of interest by identifying the polar coordinates distance r and angle ? of the centre of the region of interest in a polar coordinate system the origin of which is at the centre of the deformed thermal image; and obtaining the actual position of the person by applying a wide-angle correction function to the distance r.

Abstract: A device for transmitting an electrical parametrization signal to a drive member of a lighting module based on light-emitting diodes includes a device for transmitting the parametrization signal, while the drive member includes a device for changing the polarity of the lighting module. The transmission device is intended to be connected to a wired electrical link between the drive member and the lighting module and includes first device for detecting a signal for instructing the switching of the lighting module to reverse polarity. The transmission device are adapted for transmitting the parametrization signal to the drive member, subsequent to the detection of the signal for instructing reverse polarity.

Abstract: A device for transmitting an electrical parametrization signal to a drive member of a lighting module based on light-emitting diodes includes a device for transmitting the parametrization signal, while the drive member includes a device for changing the polarity of the lighting module. The transmission device is intended to be connected to a wired electrical link between the drive member and the lighting module and includes first device for detecting a signal for instructing the switching of the lighting module to reverse polarity. The transmission device are adapted for transmitting the parametrization signal to the drive member, subsequent to the detection of the signal for instructing reverse polarity.

Abstract: The power supply system for one or more lighting modules with light-emitting diodes comprises an electrical power source able to be connected to each lighting module via an electrical connection and a detection device to detect a connection direction of each lighting module. The detection device comprises an injection circuit to inject a setpoint current, a first comparison circuit to compute a voltage measured on the corresponding electrical connection following the injection of the setpoint with a first voltage threshold, and an inversion circuit to invert the polarity of the lighting module when the voltage measured on the corresponding electrical connection is greater than or equal to the first voltage threshold.

Abstract: The inventive power supply system (8) for one or more lighting modules (6a, 6b, 6c) with light-emitting diodes comprises an electrical power source (14) able to be connected to the or each lighting module (6a, 6b, 6c) via an electrical connection (16a, 16b, 16c) and a detection device (22) for detecting a connection direction of the or each lighting module (6a, 6b, 6c). The detection device (22) comprises, for the or each lighting module, injection means (50) for injecting a setpoint current, first comparison means (52) for comparing a voltage measured on the corresponding electrical connection (16a, 16b, 16c) following the injection of the setpoint with a first voltage threshold, and inversion means (54) for inverting the polarity of the lighting module (6a, 6b, 6c) when the voltage measured on the corresponding electrical connection (16a, 16b, 16c) is greater than or equal to the first voltage threshold.

Abstract: A power supply device and method for selection of a supply voltage or current to be applied to a lighting system having light-emitting diodes. A processing circuit performs automatic detection of the direction of connection of the lighting system by injecting at least one polarity test current pulse. Monitoring of the supply voltage and current during the polarity test current pulse, and reversal of the direction of the current or voltage for monitoring the direction of current flow for attribution of the direction of the supply voltage or current, are also performed. The device and method also include detection of the type of lighting system to be supplied with regulated voltage or regulated current according to the dynamic resistance of said system.

Abstract: The power supply device and method comprise selection of a supply voltage or current to be applied to a lighting system with light-emitting diodes. A processing circuit performs automatic detection of the direction of connection of said lighting system by injecting at least one polarity test current pulse for detection of current flow. Monitoring of the supply voltage and current during the polarity test current pulse, and reversal of the direction of the current or voltage for monitoring the direction of current flow for attribution of the direction of the supply voltage or current, are also performed. The device and method also comprise detection of the type of lighting system to be supplied with regulated voltage or with regulated current according to the dynamic resistance of said system.

Abstract: The probe comprises at least one optic fiber and an electronic circuit comprising a securing device for securing the optic fiber in optic connection with signal conversion means. The electronic circuit comprises a removable electrical connector connected to the signal conversion means such as a light-emitting diode and/or photo-detector to supply or receive electronic signals used by a processing circuit. A measuring device comprises at least one optic fiber probe connected by means of the removable connector to a processing circuit. Application in particular to temperature measurement probes and devices which comprise optic fibers and to installations comprising electrical conductors.

Abstract: A voltage sensor comprises a helicoidal winding formed by an optic fiber having at least one zone sensitive or sensitized to an electrical field having a 2nd order non-linear electro optic effect. The sensitization process of the optic fiber can be achieved by a polarization process under an electric field. The voltage sensor preferably comprises a device enabling the electrical field lines to be homogenized in the region where the helical winding is located. The phase difference induced by the optic wave by electro optic effect caused by the electrical field and representative of the voltage to be measured, can be measured by polarimetric or interferometric detection.

Abstract: Method of locally embedding a waveguide in a substrate. A mask is arranged on the upper face of the substrate. An edge of the mask obliquely intersects, at a low predetermined angle A, the waveguide to define a partially masked transition portion between non-masked portion and a fully masked portion of the waveguide. After a stage in which the waveguide is embedded in the substrate, the mask is withdrawn. The portion of the waveguide is thereby embedded at a depth greater than portion, portion forming a gradual adiabatic transition between both portions. The method is useful in the manufacture of sensors.