An apparatus for measuring velocities of projectiles launched from firearms is disclosed. The apparatus includes a stationary clamp arm and a movable clamp arm works in concert with the stationary clamp arm for clamping the apparatus to a firearm. A thumb screw is employed to secure the movable clamp arm and the stationary clamp arm to the firearm. A sensor module, which is integrated to the stationary clamp, includes a first and second sensor coils, a first magnet adjacent to the first sensor coil, and a second magnet adjacent to the second sensor coil.

An archery projectile facility comprises an elongated body. The elongated body includes at least one accelerometer. The at least one accelerometer is operable to generate three-dimensional acceleration information. The archery projectile facility comprises a body processor. The body processor is operably connected to the at least one accelerometer. The body processor is adapted to process the three-dimensional acceleration information to generate sampled information. The archery projectile facility comprises a transmitter. The transmitter is operably connected to the body processor to broadcast the sampled information. The archery projectile facility comprises a receiver. The receiver includes a receiver processor. The receiver processor is adapted to generate resulting information based on the sampled information. The resulting information is based on a determination of a stabilization point.

A muzzle-mounted chronograph for measuring velocities of projectiles launched from firearms. The chronograph includes a sensor module and a controller. The sensor module includes a first and second coils and a device for applying a stable magnetic field to the first and second coils. The controller determines a velocity of a projectile passing by the first and second coils based on detected variations in magnetic fields at the first and second coils.

A method of determining an uncertainty estimate of an estimated velocity of an object includes, determining the uncertainty with respect to a first estimated coefficient and a second estimated coefficient of the velocity profile equation of the object. The first estimated coefficient being assigned to a first spatial dimension of the estimated velocity and the second estimated coefficient being assigned to a second spatial dimension of the estimated velocity. The velocity profile equation represents the estimated velocity in dependence of the first estimated coefficient and the second estimated coefficient. The method also includes determining the uncertainty with respect to an angular velocity of the object, a first coordinate of the object in the second spatial dimension, and a second coordinate of the object in the first spatial dimension.

Automated systems and methods for collecting environmental data along a ballistic trajectory are disclosed. The systems and methods may comprise automatically estimating the ballistic trajectory of a projectile. The systems and methods may comprise automatically converting the ballistic trajectory into a ballistic flight path comprising a plurality of coordinates. The systems and methods may comprise electronically communicating the ballistic flight path to a guidance system of an Unmanned Aerial Vehicle (UAV). The guidance system may be configured to cause the UAV to navigate along the ballistic flight path. The systems and methods may comprise automatically collecting environmental data along the ballistic flight path.

A test fixture is provided for evaluating structural response of a sample to blast pressure from a muzzle of a gas gun. The fixture includes an adapter, an annular flange, a gauge assembly and a target assembly. The adapter has a proximal rim and an expansion tube. The rim attaches to the muzzle to direct the blast pressure into the tube towards an exit opposite the rim. The annular flange has a ring and a shim that attaches to the tube at the exit. The gauge assembly contains the sample between upstream and downstream stress gauges. The target assembly contains the gauge assembly. The target assembly includes front and rear annular plates connecting coaxially in parallel. The rear annular plate connects to the ring. The tube carries the blast pressure through the exit to strike the gauge assembly for the stress gauges to measure stress from the blast pressure. The ring includes first circumferentially distributed through-holes substantially parallel to the flange's symmetry axis and second circumferentially distributed mutually parallel through-holes angularly offset from the symmetry axis for mounting the rear plate to the ring either coaxially or at an oblique angle.

A waveguide arrangement for measuring the speed of a projectile during passage through a weapon barrel arrangement includes a main waveguide and at least one auxiliary waveguide. The main waveguide has a cross-section suitable for the passage of the projectile. The auxiliary waveguide extends adjacent to the main waveguide and is connected to the main waveguide via an opening. An isolator is arranged in the auxiliary waveguide. The waveguide arrangement is particularly suited for large-caliber ordinance and has at least one coupler extending at least partially in the isolator. The speed of the projectile in the main waveguide is measured at a frequency below the limiting frequency. The transmitting coupler is arranged at a spacing distance from the muzzle in order to prevent an exit of the generated signal from the weapon barrel arrangement.

A method of determining an uncertainty estimate of an estimated velocity of an object includes, determining the uncertainty with respect to a first estimated coefficient and a second estimated coefficient of the velocity profile equation of the object. The first estimated coefficient being assigned to a first spatial dimension of the estimated velocity and the second estimated coefficient being assigned to a second spatial dimension of the estimated velocity. The velocity profile equation represents the estimated velocity in dependence of the first estimated coefficient and the second estimated coefficient. The method also includes determining the uncertainty with respect to an angular velocity of the object, a first coordinate of the object in the second spatial dimension, and a second coordinate of the object in the first spatial dimension.

An archery projectile locating facility comprises an elongated body. The elongated body includes a connection facility adapted to connect to the archery projectile. The elongated body includes a microcontroller. The elongated body includes a sensor facility in communication with the microcontroller and operable to detect a flight state. The elongated body includes a transmitter in communication with the microcontroller and operable to broadcast at least one data signal after the flight state has been detected. The at least one data signal includes information generated by the sensor facility.

An archery projectile facility comprises an elongated body. The elongated body includes at least one accelerometer. The at least one accelerometer is operable to generate three-dimensional acceleration information. The archery projectile facility comprises a body processor. The body processor is operably connected to the at least one accelerometer. The body processor is adapted to process the three-dimensional acceleration information to generate sampled information. The archery projectile facility comprises a transmitter. The transmitter is operably connected to the body processor to broadcast the sampled information. The archery projectile facility comprises a receiver. The receiver includes a receiver processor. The receiver processor is adapted to generate resulting information based on the sampled information. The resulting information is based on a determination of a stabilization point.