Abstract: A Hall effect measuring device under the hood of a motor vehicle includes a housing, a Hall effect sensor including a holed magnet and a chip arranged at the Gaussian zero point of the magnet, and a ferromagnetic target including a measurement surface in which the chip is securely attached to the magnet, and defines a measurement plane. The sensor and the ferromagnetic target are arranged to be imparted with a relative motion with respect to one another, the sensor being positioned in the housing and configured to measure the value of the magnetic field of the magnet, vertically in line with the chip, on a measurement axis perpendicular to the measurement plane based on relative translational motion and on relative rotational motion.

Abstract: A method and a device for measuring the angular position, between two steering locks, of a steering wheel of a vehicle, includes equipping the vehicle with a main gearing (4, 5) designed, once the vehicle has started, to make it possible to calculate the absolute angular position of the steering wheel from data provided by a first angular sensor (15) associated with this main gearing. According to the invention, the vehicle is additionally equipped with an auxiliary gearing composed of one of the gearwheels (5) of the main gearing, of a third gearwheel (8), and of intermediate elements (6, 7, 9) for sequentially driving the third gearwheel (8) that are able to make it possible, upon starting of the vehicle, to measure the angular position of the third gearwheel (8) via a second angular sensor (16) associated with this gearwheel.

Abstract: A Hall effect measuring device under the hood of a motor vehicle, includes: a housing, a Hall effect sensor, including a holed magnet and a chip arranged at the Gaussian zero point of the magnet, and a ferromagnetic target including a measurement surface, in which the chip is securely attached to the magnet, and defines a measurement plane, the sensor and the ferromagnetic target are able to be imparted with a relative motion with respect to one another, the sensor is positioned in the housing and configured to measure the value of the magnetic field of the magnet, vertically in line with the chip, on a measurement axis perpendicular to the measurement plane, wherein the sensor is linear, the device includes a reference position corresponding to a given relative position of the chip and the target, the relative motion is with two degrees of freedom, each of which respectively corresponds to a translational motion or to a rotational motion, the device is configured to detect a deviation from the referen

Abstract: A method and a device for measuring the angular position, between two steering locks, of a steering wheel of a vehicle, includes equipping the vehicle with a main gearing (4, 5) designed, once the vehicle has started, to make it possible to calculate the absolute angular position of the steering wheel from data provided by a first angular sensor (15) associated with this main gearing. According to the invention, the vehicle is additionally equipped with an auxiliary gearing composed of one of the gearwheels (5) of the main gearing, of a third gearwheel (8), and of intermediate elements (6, 7, 9) for sequentially driving the third gearwheel (8) that are able to make it possible, upon starting of the vehicle, to measure the angular position of the third gearwheel (8) via a second angular sensor (16) associated with this gearwheel.

Abstract: A glow plug (20) for an internal combustion engine (110) essentially includes: a body (27) intended to be fixed to the engine, and a core (29) extending in a direction of elongation (11), connected to the body and intended to extend inside the combustion chamber (9) of the engine, measurement elements (200, 55, 65) intended to determine the pressure internal to the combustion chamber (9) through the displacement of the core (29) under the effect of pressure, characterized in that the glow plug is equipped with elements (50, 60) that make it possible to quantify the displacement of the core with respect to the cylinder head (5) of the engine on which the glow plug is installed.

Abstract: A glow plug (20) for an internal combustion engine (110) essentially includes: a body (27) intended to be fixed to the engine, and a core (29) extending in a direction of elongation (11), connected to the body and intended to extend inside the combustion chamber (9) of the engine, measurement elements (200, 55, 65) intended to determine the pressure internal to the combustion chamber (9) through the displacement of the core (29) under the effect of pressure, characterized in that the glow plug is equipped with elements (50, 60) that make it possible to quantify the displacement of the core with respect to the cylinder head (5) of the engine on which the glow plug is installed.

Abstract: An apparatus for detecting pressure in an engine combustion chamber includes a functional member (1) mounted in an orifice (3) of a cylinder head (5) and a pressure sensor (19) axially pressed against one part (1b) linked to the functional member, via a bearing surface (17) fixed relative to the cylinder head, so as to enable the sensor to detect a displacement of the functional member upon combustion pressure variations. A mechanical link between the functional member and the cylinder head (5) is provided via an additional element (15, 17) fixedly linked to the cylinder head and part at least of the additional element exerts a pressure on the sensor (19) defining the bearing surface in fixed position relative to the cylinder head when the functional member mounted on the cylinder head (5) is in operation ready to be subjected to the pressure in the combustion chamber.

Abstract: A contactless angular offset analog sensor, of the magnetic inductance type, includes a first portion forming a detector. The detector includes at least one substrate plate carrying at least one flat spiral winding, and at least one core layer of material with high magnetic permeability and low saturation field over at least one portion of the winding. The detector is adapted to coact with a device for processing the electrical signal measured at the terminals of the winding. The sensor also includes two rotors each having at least one magnet, disposed over a predetermined angular sector. The rotors are movable about a same axis identical to the axis of the winding. Each magnet generates in the plane of the core layer a magnetic field of a value greater than the saturation field of the core layer over at least a portion of the surface of the winding.

Abstract: A sensor system includes a coil positioned on a thin substrate sandwiched to a layer of mumeta, a high magnetic permeability material. The mumetal acts as an amplifier for the inductance L measured at the terminals of the coil. When a magnet passes in front a sheet of mumetal, its magnetic field locally saturates the mumetal whose magnetic permeability collapses on the saturated surface. The result is a reduction of the inductance factor (L) in proportion with that area of the coil covered by the saturated mumetal. This reduction in inductance is measured at the coil terminals to provide an estimation of that area of the coil that has been covered. By determining a particular layout of the coil, mumetal, and magnet, a predetermined electrical signal of inductance or coupling variations corresponding to movement of the magnet is provided.

Abstract: Contactless angular offset analog sensor, of the magnetic inductance type, comprising: