Abstract: Methods of manufacturing metal, metal-matrix, metal-metal-matrix composite weapon barrels offer barrels with improved thermal performance and rigidity with no, minimal or negative weight increase. A barrel may include a barrel core surrounded by a lightweight, thermally conductive sleeve made from metal, metal-matrix composite (MMC) materials, also referred to as metal-matrix material. The barrel core and barrel sleeve may include aligning features to prevent separation and movement of the sleeve along the core. The disclosed methods provide for material combinations and part designs that prevent separation of their parts over the life of the weapon barrel and allow the barrel to perform at high cadence over the whole temperature range the barrel is used.

Abstract: A firearm component including a barrel having a bore extending to a generally circular aperture at a forward end of the barrel. The barrel has a series of compensator slots spaced at equal intervals along the bore. Each slot has an oblong cross section extending through the barrel from an interior surface to an exterior surface having a major axis and a minor axis. The cross section also has a length measured along the major axis and a width measured along the minor axis that is shorter than the length. The interval between each adjacent pair of slots in said series of compensator slots has a width greater than the width of each slot in the adjacent pair. At least a portion of the cross section extends below the central bore axis.

Abstract: A Universal Firearm Vise System (UFVS) is provided, wherein the UFVS includes a system support article having an engagement pad and a clamp interface structure and defining a clamp structure cavity. The engagement pad is configured to be movably associated with the system support article to be configurable between a first configuration and a second configuration. The UFVS further includes a firearm support article having a firearm support base, a base support clamping article and a firearm support clamping article, wherein the base support clamping article is configured to securingly associate with the claim interface structure.

Abstract: A wireless independent tracking system (WITS) module for use with a weapon simulator in a virtual reality (VR) environment. The WITS module includes active tags for tracking a gun simulator the WITS module is coupled to; a shot detector that detects a shot being fired by the gun; a shot counter that counts a number of shots fired; a transmitter that sends a signal to a smart magazine of the gun when the gun is out of virtual ammunition; and a coupler configured to couple the WITS module to a rail of the gun.

Abstract: An archery device has a body, two limbs, two elastic shooting assemblies, two pulley assemblies, and a string. The two limbs are disposed opposite each other and are capable of swinging relative to the body. Each limb has a free end disposed away from the body. The two elastic shooting assemblies are disposed opposite each other. Each elastic shooting assembly has a guiding unit obliquely extending from the body and toward the front of the body, a joint slidably mounted around the guiding unit, and an elastic unit mounted on and around the guiding unit and simultaneously abutting against the guiding unit and the joint. The two joints of the two elastic shooting assemblies respectively abut against the two limbs. The two pulley assemblies are respectively mounted on the two free ends of the two limbs. The string has two ends respectively fixed to the two pulley assemblies.

Abstract: A crossbow string guides that include upper and lower helical power cable journals on opposite sides of a draw string journal. A separation between first and second axis of the string guides in a drawn configuration is about 5 inches to about 10 inches and the draw string in the drawn configuration comprises an included angle of less than about 25 degrees. First and second pairs of power cables wrap and unwrap at least 300 degrees around, the respective first and second upper and lower helical power cable journals as the draw string moves between a released configuration to a drawn configuration.

Abstract: A control mechanism of a vehicle-mounted system for electromagnetic launch of fire extinguishing bombs for high-rise buildings is provided. A stress wave amplifier is fixedly connected to a secondary coil, a primary coil is fixedly connected to a coil base, a guide shaft passes through a central hole in the primary coil and the coil base, and a head of the guide shaft is fixedly connected to the secondary coil. A step-up transformer TM1 boosts a 380-V alternating current and changes it to direct current to charge a pulse capacitor C1 and store energy in the pulse capacitor C1. A discharge thyristor M3 is triggered, and the pulse capacitor C1 releases the energy instantaneously. A stress wave is generated between the primary coil and the secondary coil. The stress wave is transmitted to a fire extinguishing bomb through the stress wave amplifier, to launch the fire extinguishing bomb.

Abstract: A feeding mechanism of a shooting device includes a feeding disk, a feeding wheel arranged at the feeding disk and including a feeding member, and a transmission assembly configured to drive the feeding wheel to rotate unidirectionally to cause the feeding member to push a projectile accommodated in the feeding disk to a projectile outlet.

Abstract: A firearm handgrip assembly with laser gunsight system has a frame, a laser element movably connected to the frame, an adjustor connected the frame and operably connected to the laser element to establish an aiming direction of the laser element based on a position of the adjustor, and an elastomeric restraint element contacting the laser element. There may be a spring other than the elastomeric restraint element and configured to bias the laser element against the adjustor. The laser element may be pivotally connected to the frame. The frame may define a laser element chamber configured to receive the laser element and may include a door configured to enclose the chamber. The door may include the elastomeric restraint element. The door may include a thermoplastic body, and the elastomeric restraint element may be connected to the thermoplastic body. The elastomeric restraint element may be chemically bonded with the thermoplastic body.

Abstract: A firearm having a laser induced friction surface. A method for forming the laser induced friction surface on the firearm may includes the steps of disposing the laser machine adjacent to a component of the firearm, adjusting the laser machine, then applying the laser beam of the laser machine onto a component surface.

Abstract: A firearm retention mechanism is provided for a holster. The device comprises first and second arms that each have a first end and a second end, outwardly extending retention elements and trigger guard stops, and a fastener which connects the first and second arms so that they define an open top, with the retention elements and trigger guard stops facing one another, the trigger guard stops located below the retention elements. The arms are connected to sides of the holster with the open top facing upwardly to receive a trigger guard of the firearm, which is then pressed between the retention elements.

Abstract: The present invention relates to the field of safety devices for weapons and, more specifically, it relates to a holster for handguns (P) provided with ejection port (PI) for spent casings, provided with a locking device to prevent the accidental or unauthorized extraction of the handgun from the holster itself, of the type engaging with the aforesaid ejection port, which can be actuated in an improved manner making use of the thumb of the hand that grips the weapon.

Abstract: An electrically powered device is secured to the exterior surface of a handgun-mounted laser sight. The powered device includes a housing with two parallel arms that receive between them the laser sight housing. An plug on the inside surface of one arm enters and engages with a battery cavity in the housing to create a physical interference and connection between the powered device and the laser sight device housing. The plug includes electrical circuit elements to electrically connect the powered device to a battery within the cavity. The powered device is powered by connection with a battery contained in the laser sight device to which it is mounted.

Abstract: Provided herein are systems and methods for shooting simulation of a target with a projectile. More particularly, the invention relates to virtual reality optical projection systems to monitor and simulate shooting.

Abstract: A light alloy cartridge for ammunition made by mechanical emoval of chips has a front retaining collar for retaining a projectile and a hollow body having a rim at the rear provided with a central primer hole and at the front a shoulder connecting to the collar, the hollow body having an internal surface that bounds a cavity suitable for containing the propellent, the cartridge being formed by a rear element and a front element that are structurally independent, fixed stiffly to one another, the internal surface of the hollow body having at the rim at least one notch configured to increase the volume of the cavity suitable for containing the propellent.

Abstract: A projectile for firearms is provided, which is designed as a slender rotation body for ultrasonic velocity, having an approximately cylindrical center part, a tip on the front end and a tail on the rear end which tapers conically toward a projectile base, wherein the projectile is designed such that the circumferential flow remains uniform over the entire trajectory thereof from a front shock wave, through a boundary layer enclosing the projectile body to a rear tail vortex.

Abstract: A color marker projectile, which is intended as a non-lethal projectile to mark a hit with color, is located in the projectile itself and is poured over the target on impact. The projectile is launched from a conversion kit (new barrel and bolt) of a real weapon. The color marker projectile includes a front part, a rear part, an inserted element and a color filler. The front part is formed as a semicircular cylindrical part with vertical ribs. The inserted element is positioned to complete the concluded cylindrical part of the front part. The color filler and the inserted element are positioned on the inside of the front part. The color filler is located at the contact point between the front part and the rear part.

Abstract: An apparatus including a supply system that is adapted for supplying at least a first explosives material, the supply system comprising: at least a first explosives material delivery mechanism; a bin having an upper end, a lower end, and an interior volume that provides at least a first compartment for storing an explosives material, the first compartment having a corresponding lower end; at least a first outlet provided at the lower end of the compartment for feeding the first explosives material from the first compartment to the first explosives material delivery mechanism; at least a first removable cover for a second outlet at the lower end of the compartment, and installable thereon and removable therefrom; a port provided at the upper end of the bin by which the explosives material is loadable into the first compartment; and an operation tool that is adapted to allow installation and removal of the first removable cover by way of the port without requiring any personnel to fully or partially enter in

Abstract: A system for rendering safe unexploded military ordnance items found underwater by use of immersible portable apparatus employing entrainment waterjet technology. The interior of the military ordnance item is accessed, and its internal contents are washed out and recovered. All services required to run the underwater apparatus are located above water.

Abstract: An apparatus for rendering safe unexploded military ordnance items found on land by use of a portable apparatus employing entrainment waterjet technology. The portable apparatus includes a tool package containing a plurality of tools designed for accessing the interior of a unexploded ordnance item. The interior of the ordnance item is accessed, and its internal contents, which it typically an energetic material is washed-out and recovered.

Abstract: A device includes a ruler, a leveling device attached to the ruler and a plurality of pins. The device only requires one person to hang level pictures, paintings, frames and other wall hanging objects. The ruler is a made from a rigid material and has a plurality of holes therein where the pins are inserted. The ruler has a fixed length or has a telescopic structure. The plurality of holes formed in the ruler are spaced apart from one another and the spacing is uniform or variable spacing. The leveling device is a bubble leveler including three bubble levels where one bubble level is horizontally positioned, another bubble level is vertically positioned, and the third bubble level has an angle relative to the horizontally positioned bubble level. The plurality of pins include a threaded pointed screw with a knob attached to one end of the screw.

Abstract: An ergonomic tape measure having a side which has a protruding surface that fills at least a part of the gripping cavity of an operator's hand and provides a comfortable and secure feeling grip when holding the tape measure. The tape measure can have a grip swell surface which fills part or all of the gripping cavity of an operator's hand. The tape measure can have a grip swell side center region which protrudes from a grip swell plane and into the gripping cavity of an operator's hand.

Abstract: A tape clip apparatus for resiliently and removably installing on a measuring tape, includes a main body portion hingedly connected to an engaging portion. The engaging portion is sized to substantially overlay the main body portion. The main body portion has a window including an indicator, and at least one leg having an engaging panel. The engaging portion includes a triangular cut-out tab which is aligned with the indicator in the window in the main body portion. The engaging portion also includes a cradle for holding the measuring tape, and a resilient clip for engaging the engaging panel. The cradle holds the measuring tape such that the measuring tape is visible through the window, and the triangular cut-out tab extends away from the main body portion and the engaging portion when they are folded together.

Abstract: A hole location target includes a self-centering insert having a centerline and a laser beam emitter attached to the self-centering insert. The axis of the emitted laser beam is concentric to the centerline of the self-centering insert.

Abstract: Aspects of the subject disclosure may include, for example, a process in which a first two-dimensional layer is applied to a substrate that includes all or a portion of an antenna mount. A second two-dimensional layer is applied to the first two-dimensional layer forming a bi-layer element having an axis. An initial electrical resistance exists across the bi-layer element and along its axis, wherein a first change to the substrate results in a second change to the bi-layer element such that the initial electrical resistance is replaced by a lower electrical resistance. Other embodiments are disclosed.

Abstract: A method for determining a direction of a spin axis of a rotating apparatus which includes an XYZ-magnetic field sensor. The method includes determining a global direction of a magnetic field; rotating the rotating apparatus around the spin axis, measuring at least one magnetic field value as a function of time with the XYZ-magnetic field sensor when the rotating apparatus is rotating about the spin axis, computing a magnetic field component of the magnetic field in a direction of a local body co-ordinate of the spin axis of the rotating apparatus from the measured at least one magnetic field value and determining a direction of the spin axis using the computed magnetic field component of the magnetic field and the determined global direction of the magnetic field.

Abstract: A magnetically responsive member is disposed on a rotating member along the circumference of the rotating member in such a manner that the magnetically responsive member rotates together with the rotating member, and the magnetically responsive member is formed in a line-shaped pattern varying cyclically in a rotational axis direction. A stator is disposed around the rotating member in a contactless manner, and the stator includes a primary coil wound around the rotating member, and a secondary coil forming a loop pattern of a plurality of cycles along the circumference of the rotating member. As the primary coil is AC-energized, an induced AC output signal corresponding to relative positions between the line-shaped pattern of the rotating member and the loop pattern of the secondary coil, which depend on a rotational position of the rotating member, is output from the secondary coil.

Abstract: The present invention relates to an arrangement and a method for single-shot interferometry which can be used for detecting distance, profile, shape, undulation, roughness or the optical path length in or on optically rough or smooth objects or else for optical coherence tomography (OCT). The arrangement comprises a light source, an interferometer, in which an end reflector is arranged in the reference beam path, and also a detector for detecting an interferogram. In the reference beam path of the interferometer, the end reflector can be embodied with three plane reflecting surfaces as a prism mirror or air mirror assembly in order to generate between reference and object beams a lateral shear of magnitude delta_q for obtaining a spatial interferogram. The embodiment of said assembly with regard to the angles and the arrangement of the reflecting surfaces makes possible a large aperture angle for a high numerical aperture.

Abstract: A three-dimensional target capable of serving as a positioning reference, including, on a useful face, a first structure and a second structure. The first structure defines a planar reference face divided up between at least a first portion whose surface is reflective according to a diffuse reflection, and a second portion whose surface is reflective according to a specular reflection, the second portion being divided up according to a series of localized zones positioned in the first portion. The second structure has an inclined face relative to the planar reference face. Applicable to three-dimensional optical measurement of the relative position between a first object and a second object.

Abstract: A system for automated surveying of motor vehicles, in particular passenger cars. To provide a system for automated surveying of motor vehicles, in particular passenger cars, which allows for precise surveying of the motor vehicle bodywork and/or the chassis of the motor vehicle, the system has a measuring unit including a scanning unit designed for contactless and/or tactile 3D detection of the geometry of the motor vehicle bodywork and/or surveying of the chassis of the motor vehicle. Furthermore, the measuring unit includes a travel unit for moving and orienting the measuring unit, and a central control unit for automatically controlling the measuring unit and orienting the scanning unit relative to the motor vehicle.

Abstract: A wireless charging device and an operation method thereof are provided. The wireless charging device includes a charging module, at least one proximity sensor and a central controller. The wireless charging device senses a distance variation between the wireless charging device and an object using the proximity sensor and accordingly determines whether to turn on or turn off the charging module to achieve energy saving.

Abstract: The present disclosure describes systems and methods for conducting deformation (e.g., extension and/or strain) measurements based on characteristics of a test specimen using light sourced from a single side of a test specimen. The light source and an imaging device are arranged on a single side of the test specimen relative to a back screen while the light source illuminates both a front surface of the test specimen and the back screen. The back screen reflects light to create a silhouette of the test specimen. The imaging device captures images of one or more markers on a front surface of the test specimen, as well as measuring position of the markers during the testing process. The imaging device also measures relative changes in position of the edges of the test specimen during the testing process, by analyzing the edges of the silhouetted image created by the reflective back screen.

Abstract: A technique for calibrating a 3D imaging system (3D-IS) that has a large field of view (FoV?1 m3) involves: a metrological target mounted for fixed positioning with respect to an origin of the 3D-IS; a movable target plate (MTP) with at least one fiducial mark provided on a marked surface thereof; and a range and orientation measurement system (ROMS) on the MTP for measuring a distance and orientation of the MTP relative to the metrological target. The MTP is designed so that when the MTP is manipulated within the 3D-IS's FoV at an angle at which the ROMS can determine its position and orientation relative to the metrological target, at least a majority of the at least one fiducial marks is presented for coordinatization by the 3D-IS. Using such equipment, calibration involves using the measured data and the simultaneous coordinatization to calibrate.

Abstract: A system can include an axis, a motor coupled with the axis and configured to rotate the axis, an optical modulator coupled with the axis and configured to be rotated by the axis, a lens element, a projection surface, a laser device configured to shine light through the optical modulator to project structured light onto the projection surface through the lens element, and a sensor configured to capture an image of a sample and structured light that is reflected from the projection surface and the sample surface. The system can also include a computing system having a synchronization module configured to phase lock the system by coordinating the laser device and the sensor and an analysis module configured to compute a three-dimensional (3D) object based on the structured light that is reflected from the projection surface and the sample surface.

Abstract: A three-dimensional shape measuring apparatus includes: a single projector device that projects a first light pattern whose luminance changes at a first cycle and a second light pattern whose luminance changes at a second cycle that is longer than the first cycle on a measured object; an image capture device that acquire an image of the measured object on which the first or second light pattern is projected; and an image processing device that processes the image acquired by the image capture device.

Abstract: A device for providing a targeting platform for a 3D scanning system is provided. The device includes a rigid bulk structure; a measuring surface arranged on a first side of the rigid bulk structure; a mounting surface arranged on a second side opposite the first side; one or more mounting structures arranged on the mounting surface, wherein the one or more mounting structures provides for removable mounting of the device from another surface; and a plurality of targeting members on the measuring surface, wherein the measuring surface is arranged to provide supplemental metrology scans for the another surface.

Abstract: A test block is formed of at least one profile block and one mating block, wherein the two blocks lying one on top of the other with varying thickness combinations are radiographed together, in order to ascertain, for the pairings of the materials in the respective thickness, in each case a reference value relating to their common radiographic properties.

Abstract: A sensing system is embedded into a fabric or material that conforms to a portion of a user's body. The fabric or material has transmitting antennas and receiving antennas placed thereon. Movement of the fabric or material with the transmitting and receiving antennas placed thereon are able to measure the changes in the signals received by the receiving antennas. Measurement of the changes are used to determine movement of and position of parts of the body within and/or distal to the fabric or material by determining localized pressure deformation to reconstruct volumetric changes.

Abstract: A method is provided for modeling and analyzing a generalized microscopic stress concentration phenomenon on a machined surface.

Abstract: The present invention relates to a method, to a computer program comprising instructions and to a device for determining a vehicle spacing for an observation period. The invention also relates to a motor vehicle and to a back end, in which a method according to the invention, or device according to the invention, is used. In a first step, measurement values relating to an average vehicle spacing for a plurality of measurement times are received. These values may be stored for later use. The situation may arise in which an unusable measurement value is identified at an error time. In this case, a vehicle spacing for a current observation period that contains the error time is determined based on a vehicle spacing determined from the recorded measurement values for a previous observation period.

Abstract: A method, apparatus, and system for processing images. A featureless surface is detected during at least a portion of a flight of an aircraft. A pattern is displayed in a fixed location on the featureless surface while the featureless surface is in a field of view of a camera system carried by the aircraft during at least the portion of the flight of the aircraft. Images of the featureless surface with the pattern in the fixed location using the camera system are generated during at least the portion of the flight of the aircraft.

Abstract: A 3D modelling system for three-dimensionally modelling a scene by multi-view photogrammetry has cameras placed around the scene and grouped together in pairs that are spaced further apart from one another than the two cameras in each pair are spaced apart from each other, and a digital processing device that is configured to produce modelling data by applying stereoscopy processing by comparison firstly between the images of the scene that are produced by respective ones of the two cameras of a first and a second pair of cameras and secondly between the images produced by two cameras belonging to respective ones of the first and second pairs of cameras, the first and the second pairs of cameras being arranged respectively in a horizontal plane and in a vertical plane.

Abstract: A reflector arrangement for determining the position or marking of target points, having at least one retroreflector, and a beam detection unit, by means of which the orientation measurement radiation passing through the retroreflector is acquirable. The beam detection unit comprises a first sensor for generating a signal in dependence on an acquisition of orientation measurement radiation and a first beam guiding unit. The first sensor and the first beam guiding unit are arranged such that a detection field of view for acquiring the orientation measurement radiation is defined, an alignment of the detection field of view around the yaw axis is variable and orientation measurement radiation passing through the retroreflector is acquirable in dependence on the alignment of the detection field of view with the first sensor.

Abstract: An electronic device displays a compass user interface with a direction indicator and a bearing indicator. The direction indicator provides an indication of a respective compass direction, wherein the appearance of the direction indicator is determined based on the orientation of the electronic device relative to the respective compass direction. The bearing indicator provides an indication of an offset from the respective compass direction. While displaying the bearing indicator, the electronic device detects rotation of the rotatable input mechanism and, in response, changes the displayed position of the bearing indicator from a first position to a second position by an amount that is determined in accordance with a magnitude of the rotation of the rotatable input mechanism.

Abstract: Methods of calibrating strapdown heading sensors and strapdown heading sensors are provided. The methods include compensating raw sensor data generated by sensors of an uncalibrated strapdown heading sensor to compensate for errors in an instrument frame of the strapdown heading sensor. The strapdown heading sensor is put in a target apparatus and output data is compensated to compensate for errors in an apparatus frame relative to the instrument frame. The strapdown heading sensors include a housing and a compass module having a first sensor configured to detect a magnetic field of the Earth and a second sensor configured to detect a gravitational force of the Earth. The first sensor and the second sensor are each passively isolated from bending and/or flexing of the housing such that an alignment between the first sensor and the second sensor is not disturbed due to the bending and/or flexing.

Abstract: A drive signal is applied to a MEMS gyroscope having several intrinsic resonant modes. Frequency and amplitude of mechanical oscillation in response to the drive signal is sensed. At startup, the drive signal frequency is set to a kicking frequency offset from a resonant frequency corresponding to a desired one of the intrinsic resonant modes. In response to sufficient sensed amplitude of mechanical oscillation at the kicking frequency, a frequency tracking process is engaged to control the frequency for the drive signal to sustain mechanical oscillation at the frequency of the desired one of the plurality of intrinsic resonant modes as the oscillation amplitude increases. When the increasing amplitude of the mechanical oscillation exceeds a threshold, a gain control process is used to exercise gain control over the applied drive signal so as to cause the amplitude of mechanical oscillation to match a further threshold. At that point start-up terminates.

Abstract: A microelectromechanical system (MEMS) gyroscope sensor has a sensing mass and a quadrature error compensation control loop for applying a force to the sensing mass to cancel quadrature error. To detect fault, the quadrature error compensation control loop is opened and an additional force is applied to produce a physical displacement of the sensing mass. A quadrature error resulting from the physical displacement of the sensing mass in response to the applied additional force is sensed. The sensed quadrature error is compared to an expected value corresponding to the applied additional force and a fault alert is generated if the comparison is not satisfied.

Abstract: A microelectromechanical system (MEMS) gyroscope includes a driving mass and a driving circuit that operates to drive the driving mass in a mechanical oscillation at a resonant drive frequency. An oscillator generates a system clock that is independent of and asynchronous to the resonant drive frequency. A clock generator circuit outputs a first clock and a second clock that are derived from the system clock. The drive loop of the driving circuit including an analog-to-digital converter (ADC) circuit that is clocked by the first clock and a digital signal processing (DSP) circuit that is clocked by the second clock.

Abstract: A vibration type gyroscope uses a resonator formed of a MEMS. At the time of startup, a lock state determination unit stabilizes an amplitude of a drive signal and outputs a lock signal when the amplitude is stabilized. A phase shifter generates an orthogonal signal by shifting, by 90°, the phase of the drive signal, and a phase compensator outputs a phase signal having a phase corresponding to a control signal based on the orthogonal signal and the in-phase signal of the drive signal. A multiplier multiplies a sense signal and the phase signal outputted from the phase compensator, and a control LPF performs filtering on a multiplication result. A control unit inputs a zero level signal to a PI controller during an initial state, and starts phase control by receiving an output signal of the control LPF, and ends the control when the signal is stabilized around the zero level.

Abstract: The present invention relates to a method for estimating the movement of an object (1) moving in an ambient magnetic field, the method being characterised in that it includes the steps of: (a) Acquisition: by magnetic measurement means (20) fixed with respect to said object (1), of at least one component of the magnetic field and/or an i-th derivative of the magnetic field; by measurement means other than magnetic (24) fixed with respect to said object (1), of at least one item of information representative of the movement of the object (1); (b) Evaluation of the stationary or otherwise character of the magnetic field at the magnetic measurement means (20); (c) Estimation by the data processing means (21, 31, 41) of at least one component of the movement of said object (1) using, at least one equation other than magnetic linking said component of the movement of said object (1) and the at least one acquired item of information representative of the movement of the object (1); depending on the result of