Abstract: The invention relates to a method of manufacturing an element sensitive to at least one physical parameter of a flow of fluid, comprising a step consisting in a single cycle of immersing, in molten glass, a core of a preassembled sensitive element, said core comprising at least two longitudinal channels along which there pass longitudinally at least two conducting connecting wires which are connected to an at least two-wire winding, said winding being suited to forming a resistive or inductive circuit for detecting said physical parameter, said immersion allowing the connecting wires to be sealed into the channels, allowing said channels to be filled and allowing the outside of the core to be coated in a single immersion, the core, at the end of said single immersion cycle, being sealed and coated in such a way as to obtain an assembled sensitive element.

Abstract: The invention relates to a pressure sensor including: a sensitive element including a mounting substrate, said mounting substrate including a top surface and a bottom surface, the sensitive element also including a deformable diaphragm that is connected to the top surface of the mounting substrate; a housing, in which the sensitive element is placed, said housing including a base; an intermediate structure placed between the base of the housing and the mounting substrate, said intermediate structure including a base, the base including a top surface and a bottom surface that is connected to the base of the housing, said intermediate structure being configured such as to keep the mounting substrate at a predetermined distance from the top surface of the intermediate structure; and an adhesive layer extending onto the top surface of the intermediate structure.

Abstract: The invention relates to a system for measuring pressure, including a pressure sensor comprising: a deformable membrane on which is placed a resistive bridge able to deliver a bridge voltage representative of a deformation of the deformable membrane caused by a pressure applied to said deformable membrane; a system for limiting the deformation of the deformable membrane, able to limit the bridge voltage in the case of an over-pressure or an under-pressure on the deformable membrane; and an amplifying electronic circuit connected to the resistive bridge, able to deliver an output voltage depending on the bridge voltage; the limiting system and the electronic circuit are conjointly configured so that the output voltage makes it possible to distinguish the case of failure of the pressure sensor and/or of the electronic circuit from the case of an over-pressure or under-pressure on the deformable membrane.

Abstract: The invention relates to a method for producing a pressure sensor, comprising the following steps: assembling a support substrate with a deformable membrane on which strain gauges have been deposited, wherein the deformable membrane comprises a thinned area at the center thereof, the support substrate is disposed on top of the deformable membrane, the support substrate comprises an upper surface and a lower surface in contact with the deformable membrane, and the support substrate also comprises lateral recesses arranged on top of the strain gauges and a central recess arranged on top of the thinned area of the membrane, so as to obtain a micromechanical structure; and, once the assembly has been obtained, depositing, in a single step, at least one conductive material on the upper surface of the support and in the lateral recesses of the support, said conductive material extending into the recesses in order to be in contact with the strain gauges so as to form electrical contacts in contact with the strain ga

Abstract: The invention relates to a micromechanical structure for measuring or detecting a mechanical quantity or a dynamic quantity, including a deformable membrane (20) and a supporting substrate (10), the membrane (20) including a first portion (20a) and a second portion (20b) surrounded by the first portion (20a), the second portion (20b) having a thickness that is less than the thickness of the first portion (20a), the membrane (20) being suspended above the supporting substrate (10) and thus defining a free space (30), said micromechanical structure comprising in addition a lower abutment (21) for limiting the deformations of the membrane (20), said lower abutment (21) being arranged above the supporting substrate (10) and extending into the free space (30) from said supporting substrate (10) toward the membrane (20), characterized in that the lower abutment (21) comprises islets (101-108) that extend into the free space (30) toward the membrane (20) from a flat surface of the lower abutment (21), the islets (10

Abstract: The invention concerns a device for measuring at least one physical parameter of a fluid flow, in particular the total air temperature, comprising: a profiled body (2) of elongate shape along a longitudinal axis (L) and having at least two walls arranged contiguous to each other at an acute angle to form a wedge-shaped portion (7), said wedge-shaped portion (7) extending in a direction parallel to the longitudinal axis (L) of the profiled body (2); at least one sensing element (4) for measuring the physical parameter of the fluid flow, said sensing element (4) being positioned in a window (3) formed through the profiled body (2), characterized in that each of the walls (71; 72) forming the wedge-shaped portion (7) comprises at least one notch forming a deflector angle relative to said wall (71; 72) so as to weaken the formation of ice on the wedge-shaped portion (7).

Abstract: The invention relates to a micromechanical structure for measuring or detecting a mechanical quantity or a dynamic quantity, including a deformable membrane (20) and a supporting substrate (10), the membrane (20) including a first portion (20a) and a second portion (20b) surrounded by the first portion (20a), the second portion (20b) having a thickness that is less than the thickness of the first portion (20a), the membrane (20) being suspended above the supporting substrate (10) and thus defining a free space (30), said micromechanical structure comprising in addition a lower abutment (21) for limiting the deformations of the membrane (20), said lower abutment (21) being arranged above the supporting substrate (10) and extending into the free space (30) from said supporting substrate (10) toward the membrane (20), characterized in that the lower abutment (21) comprises islets (101-108) that extend into the free space (30) toward the membrane (20) from a flat surface of the lower abutment (21), the islets (10

Abstract: A heater resistance in particular for heating a solid part. An electric wire, and a ceramic sheath surround the wire. The sheath has a woven layer.

Abstract: The invention concerns a pressure sensing die to be mounted on a base, comprising: a diaphragm structure with a deflectable pressure sensing diaphragm whose deflection is representative of the pressure and sensing elements for detecting the deflection of the sensing diaphragm; a pedestal supporting the diaphragm structure; wherein the pedestal is a composite pedestal comprising top and bottom platforms connected by at least one small link having a mean cross-section smaller than the cross-section of the top platform, said small link isolating at least some of the stresses, produced by the mounting of the pressure sensing die on the base, from said deflectable pressure sensing diaphragm.

Abstract: The invention relates to a pressure sensing die to be mounted on a base, comprising: a sensing structure comprising: a diaphragm structure with a deflectable sensing diaphragm whose deflection is representative of the pressure and sensing elements for detecting the deflection of the sensing diaphragm, a pedestal supporting the diaphragm structure, a linking structure for isolating at least some of the stresses caused by the mounting of the sensing die on the base from said deflectable sensing diaphragm, the linking structure being linked on one side to a bottom surface of the pedestal and to be linked, on an opposite side, to a top surface of the base, wherein the linking structure comprises at least one linking element extending between the base and the pedestal and having a mean cross-section smaller than the said bottom surface and top surface so as to constitute a small link between the base and the pedestal. The invention further relates to a method of manufacturing such a sensing die.

Abstract: The invention relates to an overheat detection sensor. The inventive sensor is characterised in that it comprises a conductive core which extends inside a first conductive sheath, said core and first sheath being separated by a material having a positive or negative temperature coefficient The detector also comprises a wire which is made from a material having a positive or negative temperature coefficient. Said wire extends around the first sheath and is separated from same by means of an insulating material. The central core, the first sheath and the wire are all connected to connection means.

Abstract: The invention relates to an overheat detection sensor. The inventive sensor is characterised in that it comprises a conductive core which extends inside a first conductive sheath, said core and first sheath being separated by a material having a positive or negative temperature coefficient The detector also comprises a wire which is made from a material having a positive or negative temperature coefficient. Said wire extends around the first sheath and is separated from same by means of an insulating material. The central core, the first sheath and the wire are all connected to connection means.

Abstract: Ice detection assembly (100) designed for installation on an aircraft, comprising a vibrating finger (110) and a mast (120), the vibrating finger (110) extending into the air from the mast (120) and capable of being vibrated by vibration means at a resonant frequency that is sensitive to an ice deposit on its surface, characterised in that it comprises a cooling system capable of cooling at least part of the detection assembly (100).

Abstract: A flow meter which includes a resistive wire placed in the path of a fluid whereof the flow rate is to be measured. A processing unit for applying current pulses to the wire and for determining the cooling speed of the wire between the pulses. The processing unit also determines a cooling parameter and determines from the cooling parameter data concerning a possible operational drift or anomaly.

Abstract: A sensor for measuring physical parameters of a fluid, the sensor comprising an air intake fitted on a streamlined body, and a duct formed in said streamlined body to enable the fluid to flow and communicating with said air intake, the sensor being characterized in that said air intake has an inside section that is, at least in part, rounded and fitted on the streamlined body via a surface that is plane.

Abstract: The invention concerns a mass flow meter comprising at least a resistive wire (1 or 2) placed in the path of a fluid whereof the flow rate is to be measured, means (30) for applying to the wire current pulses, measuring means for determining the cooling speed of the wire between said pulses. The invention is characterised in that it comprises means for determining, on the basis of at least one measurement of the cooling speed, the type of fluid on the path of which the resistive wire is arranged.

Abstract: A sensor used to measure temperature or concentration of a combustible gas. The sensor includes an optical head that picks up infrared information emitted by the combustible gas. The infrared information is conveyed from the optical sensor through a diffracting device onto a strip of photodetectors. A processor receives the information garnered by the photodetectors and determines the concentration and temperature profile of the combustible gas based on a stored thermodynamic model, radiation behavior, varying the thermodynamic parameters, and comparing a calculated spectrum with the measured spectrum. The sensor additionally has elements, such as cooling devices and casing to make it suitable for use with aviation where altitude creates problems with known methods of gas temperature analysis.

Abstract: The invention concerns a probe (S) for measuring physical parameters of a fluid flow generally directed rearwards of the probe, the probe comprising a structure (10, 20) bearing at least a sensor (C). The invention is characterised in that said structure comprises a part (20) whereof a leading edge (22) extends generally frontwards of the sensor and has a shape adapted to generate a vortex, and the sensor extends in the axial region of said vortex.

Abstract: The liquid level sensor comprises a graduated tape or cable whose free end is fixed to a plunger core that includes a housing and a probe for detecting the presence of a liquid. The probe comprises a metal waveguide having a cylindrical solid top portion, a portion of smaller section constituting a mechanical amplifier, a frustoconical portion, and a cylindrical bottom end portion constituting the sensitive portion of the probe. The metal waveguide is connected to the housing of the plunger core in sealed manner via a support flange which is fixed to the conical portion of the metal waveguide in such a manner that only the portion of the waveguide situated beneath the fixing zone emerges from the housing and can come into contact with a liquid. A transducer electrically powered by electronic processing circuits is disposed at the free end of the top portion and is excited at a predetermined frequency f.sub.i to create incident elastic waves in the waveguide.