Abstract: A gyroscopic system supplies measurements on the basis of a vibratory gyroscope, which vibrates in a first vibration position and supplies a measurement signal. A periodic command signal is applied to it over a time period to cause the vibration geometrical position to turn a first way during one part of the time period, causing a change in accordance with a first speed profile from the first position to a second position; and to cause the vibration geometrical position to turn a second way opposite the first way during the other part of the time period, causing a change in accordance with a second speed profile from the second position to the first position. The speed profiles indicate a speed variation of the change of position. The measurements supplied by the system are then based on a corrected signal obtained by subtracting the command signal from the measurement signal supplied by the gyroscope.

Abstract: The resonator comprises a shell 1 a having a pole 2 held by a support rod 3, the shell having an annular edge 4 defined by an inside surface 5 and an outside surface 6 that are geometrically similar and that extend around a common axis of revolution R, the inside surface and the outside surface being offset relative to each other along the axis of revolution in such a manner that the shell presents a thickness E along the annular edge 4 that is greater than the thickness e that it presents in the vicinity of the pole 2.

Abstract: A resonator for an angular parameter sensor, the resonator comprising a bell of electrically-insulating material provided with a central stem and an electrically-conductive layer, the conductive layer comprising branches extending from a central portion of the bell to a peripheral edge of the bell, the number of said branches being a prime number not less than seven.

Abstract: The invention concerns a device for countering and tracking a threat with optical delay device in the form of a homing-head missile, comprising a homing head adapted to receive an incident coherent light beam and in deflecting same to produce a transmitted beam. The invention is characterized in that the homing head comprises a biprism dividing the transmitted beam into two sub-beams, the biprism being associated with an optical delay device introducing an optical path difference between the two sub-beams greater than the coherence length of the incident beam.

Abstract: The invention relates to an iris recognition method, comprising the steps of acquiring an image of at least one eye of a user in an infrared spectrum, and of processing said image to extract therefrom identification characteristics from the iris as defined by an outer boundary in the eye, the method comprising the steps of: acquiring an image of the eye in a visible spectrum substantially simultaneously with acquiring the image of the eye in the infrared spectrum; and prior to processing the infrared image, determining the outer boundary of the iris from the image in the visible spectrum. The invention also provides iris recognition apparatus.

Abstract: The method of aligning an inertial unit having an axially symmetrical vibrating sensor that generates vibration comprises the step of establishing the vibration in a position for which the sensor presents variation in drift error that is the smallest relative to variation in drift error for other positions of the vibration.

Abstract: A device for artificially restoring an opposing force for a device for remotely controlling an aircraft control surface, the device comprising: an actuator member (1) mounted to pivot about an axis (2) and entrain a rotary shaft (3); a stationary finger (8) parallel to said shaft (3) and supported at a radial distance from the shaft; a moving finger (5) secured to the shaft and supported at the same radial distance as the stationary finger, both fingers being parallel to the shaft; a slab (9) supported at the same radial distance as the fingers and disposed beside them; a first spring (11) between the stationary finger and the slab; and a second spring (10) between the moving finger and the slab.

Abstract: A power supply device for powering equipment from at least one network supplying AC and at least one battery supplying DC, the power supply device comprising: a first branch that is connected to the main network and that comprises a transformation member for transforming the AC voltage into an equivalent DC voltage; a second branch that is connected to the battery and that comprises a voltage booster for raising the DC voltage supplied by the battery to an output voltage close to the DC voltage equivalent to the AC voltage; the first branch and the second branch being connected by a switch member to a converter arranged to transform the DC voltage equivalent to the AC voltage of the network into at least one DC voltage for powering the equipment.

Abstract: A device for remotely controlling the control surfaces of an aircraft, the device comprising: an actuator member pivotable about an axis and entraining a rotary shaft; a stationary finger parallel to the shaft and supported at a radial distance from the shaft; a moving finger secured to the shaft and supported at a radial distance therefrom, both fingers being parallel to the shaft; a first slab supported at a radial distance from the shaft beside the two fingers on one side thereof and suitable for turning about the axis of the shaft; a second slab supported at a radial distance from the shaft beside the two fingers on their side opposite from the first slab, and suitable for turning about the axis of the shaft; a third slab supported at a radial distance from the shaft beside the second slab at an angular distance therefrom and suitable for turning about the axis of the shaft; a first spring between the first and second slabs; and a second spring between the first and third slabs.

Abstract: A method of exchanging information between a first network implementing a routing protocol using static routing tables and a second network implementing a routing protocol using dynamic routing tables and including stages of exchanging identification messages and of exchanging routing table update messages, the method comprising the steps of: a first routing element associated with the first network issuing to a second routing element associated with the second network identification messages containing identifiers of network elements to which the first routing element knows it is connected either directly or indirectly, and in the second routing element updating the routing table from the identification messages coming from the first routing element.

Abstract: The present invention relates to a method of managing a supply of electrical power to an appliance that is delivered by means of at least a first battery and a second battery, said method comprising the following steps: powering the appliance by means of the first battery so long as said first battery has a level of charge sufficient for powering the appliance; when the battery has a level of charge that is insufficient, powering the appliance by means of the second battery; and powering the appliance with both of the batteries in parallel when the levels of charge of both batteries are substantially equal and insufficient for it to be possible to power the appliance using a single one of the batteries. The invention also relates to an electrical power supply circuit for implementing said method, and to a method of powering an appliance when cold.

Abstract: The invention relates to an actuating device comprising at least two coaxial bimetal disks and at least one axial strut arranged between the disks, the bimetal disks being mounted opposite each other and being deformable in opposite directions according to the thermal variations. The invention can be especially applied to the thermal compensation of an optical system.

Abstract: The invention relates to a method for validating a biometrical acquisition, mainly the acquisition of a body imprint of a body area such as fingerprints or a face imprint, wherein the method involves together with the biometric acquisition: lighting the body area using at least one radiation having at least two respective different wavelengths between approximately 500 nm and 1150 nm; taking at least two reflectometry measurements concerning said and at least two wavelengths for measuring the reflection index of the tissues for these wavelengths; calculating the ratio for two measured indices; and comparing the ratio with a range of reference values characterizing a haemoglobin-containing living tissue in terms of proportions of oxygenated and non-oxygenated forms characteristic of the living states for the wavelengths in question; if the ratio is included in said range, the body area is considered as living and the biometrical acquisition is validated; and conversely, if the body area is considered as not li

Abstract: The present invention concerns a method of determining the living character of an element carrying a fingerprint. The method according to the invention is characterised in that it consists of making on the one hand at least one electrical measurement and on the other hand taking an image of the said fingerprint, and then validating the said or each electrical measurement by comparing it with the range of values of electrical measurements defined by a pre-established relationship linking the said range to characteristics of the said image.

Abstract: A method for identifying a person (200) by capturing an image of the iris producing an anamorphic transformation of the image along a horizontal axis and then a vertical axis to code it in the form of one or two models. The model is compared with reference models stored in a database to determine the identity of the person. The acquisition device captures the image of the iris through means of optical deformation to produce the anamorphic transformation of the image and then codes the image into the models.

Abstract: The invention relates to a system (100) for capturing images of the face of an individual comprising: an image capture device (110) having a line of sight (112) directed towards the place from where the individual arrives, and two illumination devices (102, 104) disposed symmetrically with respect to the line of sight (112) and at a distance therefrom, each comprising means of generating a light flux intended to illuminate the face of the individual as he moves and whereof the illumination lobe (106, 108), representative of the luminance in a horizontal plane, has a maximum, the two lobes (106, 108) being symmetrical with each other with respect to the line of sight (112), the capture system (100) being characterised in that the generation means are such that each lobe (106, 108) is asymmetric with respect to the straight line bearing said maximum and has, from this maximum, a first front (122) curved towards the image capture device (110) and a second front (120) that is substantially plane and extending

Abstract: A method of managing a memory having stored elements that are organized in a hierarchy, each having a header containing individual identity information and a body containing data, the identity information of each element being encoded on a plurality of bits each of which can take a first value or a second value. The identity information of each element is obtained by repeating the identity information of an element constituting a direct antecedent of the element in question in the hierarchy, and in said identity information of the antecedent, by changing the value of a first value bit that follows the last second value bit in a direction for reading the identity information.

Abstract: A compact night vision binoculars with a first eyepiece channel and a second eyepiece channel and including: an optical separator (8), positioned at the output of a light intensifier tube (2); a plane of reflection (8?) common to the first optical channel (BYZC) and the second optical channel (BCW); a first optical combination comprising two first convergent groups (V1, V2) positioned on either side of a first reflective angled surface (5); a second reflective angled surface (6); a second optical combination comprising two second convergent groups (V1?, V2?) positioned on either side of the common plane of reflection (8?); and a third reflective angled surface (7).

Abstract: The method of verifying the integrity of an encryption key (K) obtained by combining at least two key portions (KM, M) in a protected zone (3) by using a commutative operator, comprises the steps of: using the commutative operator to perform a first combination between a key portion (KM) and a verification encryption key (Kv); using the commutative operator to perform in succession a combination between a key portion that has not yet been combined and a result obtained by an immediately preceding combination, until a last combination (Mv) is performed that includes all of the key portions; performing a combination in the protected zone (3) between the encryption key (K) to be verified and the last combination (Mv) of the verification encryption key (Kv) and the key portions (KM, M) in order to obtain a final verification key (Kf); encrypting verification data (Dv) by means of a symmetrical encryption algorithm (DES) using the final verification key (Kf); and making a comparison with a verification encryption

Abstract: The invention relates to an aircraft wing including two members removably connected end to end by a coupling means including: a male coupling part with spaced opposed upper and lower faces, a first face being planar while the second face has a longitudinal relief (9) with a V-shaped section, said first and second faces being mutually included towards each other at their free ends; a female coupling part with spaced upper and lower faces facing each other, a first face being planar while the second face has a longitudinal relief with a V-shaped section complementary to that of the relief, and said first and second faces being mutually inclined away from each other at their free ends; and means for retaining the two parts coupled with their respective interacting faces in a mutual bearing relation.