A piezoelectric generator for generating power upon an acceleration and upon a deceleration of a body. The piezoelectric generator including: first and second masses; first and second springs, the first spring being connected to the body at one end and to the first mass at an other end, the second spring being connected to the body at one end and to the second spring at an other end; and a piezoelectric material connected to the first and second masses such that the piezoelectric material generates power when the body is accelerated or decelerated.

An energy harvesting electronic primer (e-primer) system including smart ammunition with e-primer technology to enhance public safety from the discharge of a firearm by replacing conventional mechanical primers used for the activation of energetic materials with an electronic primer in center fire type ammunitions, grenades, bombs and other explosive devices wherein the ammunition includes an e-primer system having a firing pin, primer cup with a safety switch, antenna, piezo element, diode, capacitor, microcontroller, thermal wire, nanoenergetic and flash hole and radio transmitter circuitry wherein the mechanical force of the firing pin strikes a nanoenergetic material to activate the initial phase of an energetic train unless the e-primer is neutralized by a radio or acoustic signal captured by the antenna mounted within the ammunition where the radio signal includes a deactivation code to neutralize the ammunition. when located in a space specifically designed to receive the radio or acoustic signal.

The invention relates to a percussion fuse having an active sensor, which generates a sensor voltage, having a filter circuit consisting of a high pass and at least one low pass, in order to be able to adjust dynamic percussion characteristics. The invention further relates to an operating state switch, which can transition the percussion fuse into one of two operating states, specifically into an activated and a deactivated operating state. To this end, the operating state switch is switched into one of the two operating states by means of a safety voltage. In the active operating state, the sensor voltage is supplied directly to the threshold value switch and in the deactivated operating state, the sensor voltage is held below the threshold value of the threshold value switch by an input limiter.

The disclosure describes, in various example embodiments, a small arms or firearm projectile including a shell and a hemostatic material retained within the shell. The hemostatic material has a mechanical modulus above 25,000 Pa. In some embodiments, the shell includes a plurality of perforations. In some embodiments, the plurality of perforations are configured to provide, upon an impact of the projectile, fluid communication between the hemostatic material and the exterior of the shell via the plurality of perforations. In some embodiments, the hemostatic material includes a polymer core configured to provide a scaffold for inducing hemostasis in a local wound volume. In some embodiments, the projectile includes a contrasting agent. In some embodiments, the projectile includes a lubricating agent retained in the interior of the shell. In some embodiments, the projectile further includes 0.5 to 3 grains of Kaolin retained in the interior of the shell.

The disclosure describes, in various example embodiments, a small arms or firearm projectile including a shell and a hemostatic material retained within the shell. The hemostatic material has a mechanical modulus above 25,000 Pa. In some embodiments, the shell includes a plurality of perforations. In some embodiments, the plurality of perforations are configured to provide, upon an impact of the projectile, fluid communication between the hemostatic material and the exterior of the shell via the plurality of perforations. In some embodiments, the hemostatic material includes a polymer core configured to provide a scaffold for inducing hemostasis in a local wound volume. In some embodiments, the projectile includes a contrasting agent. In some embodiments, the projectile includes a lubricating agent retained in the interior of the shell. In some embodiments, the projectile further includes 0.5 to 3 grains of Kaolin retained in the interior of the shell.

A piezoelectric sensor arrangement for use in a projectile comprises a piezoelectric sensor enveloped by a damping layer adapted to attenuate signals of frequencies above a predetermined cutoff frequency whereby the voltage output signal of the piezoelectric sensor upon impact on a desired hard target can be discriminated from voltage output signals originating from impact on undesired soft objects. A method of discriminating voltage outlet signals by means of the piezoelectric sensor arrangement and the use of a piezoelectric sensor arrangement in a projectile to safeguard unintentional detonation does not occur is described herein.

A piezoelectric sensor arrangement for use in a projectile comprises a piezoelectric sensor enveloped by a damping layer adapted to attenuate signals of frequencies above a predetermined cutoff frequency whereby the voltage output signal of the piezoelectric sensor upon impact on a desired hard target can be discriminated from voltage output signals originating from impact on undesired soft objects. A method of discriminating voltage outlet signals by means of the piezoelectric sensor arrangement and the use of a piezoelectric sensor arrangement in a projectile to safeguard unintentional detonation does not occur is described herein.

A method for detecting hardened bunkers within a target, the method including: producing a first output from a sensor fired to travel through the hardened bunkers, the first output being different from a second output when the sensor travels in a void between the hardened bunkers or encounters other objects outside of the hardened bunkers; and determining one or more of the number of hardened bunkers, a thickness of the hardened bunkers and a strength of the hardened bunkers based on the first and second outputs of the sensor over time. The sensor can include one of a piezoelectric generator for producing a voltage output and a circuit input by the voltage output or an accelerometer having a locking member for locking a proof mass during periods of impact with the one or more hardened bunkers.

A method for detecting hardened bunkers within a target, the method including: producing a first output from a sensor fired to travel through the hardened bunkers, the first output being different from a second output when the sensor travels in a void between the hardened bunkers or encounters other objects outside of the hardened bunkers; and determining one or more of the number of hardened bunkers, a thickness of the hardened bunkers and a strength of the hardened bunkers based on the first and second outputs of the sensor over time. The sensor can include one of a piezoelectric generator for producing a voltage output and a circuit input by the voltage output or an accelerometer having a locking member for locking a proof mass during periods of impact with the one or more hardened bunkers.

The disclosure describes, in various example embodiments, a small arms or firearm projectile including a shell and a hemostatic material retained within the shell. The hemostatic material has a mechanical modulus above 25,000 Pa. In some embodiments, the shell includes a plurality of perforations. In some embodiments, the plurality of perforations are configured to provide, upon an impact of the projectile, fluid communication between the hemostatic material and the exterior of the shell via the plurality of perforations. In some embodiments, the hemostatic material includes a polymer core configured to provide a scaffold for inducing hemostasis in a local wound volume. In some embodiments, the projectile includes a contrasting agent. In some embodiments, the projectile includes a lubricating agent retained in the interior of the shell. In some embodiments, the projectile further includes 0.5 to 3 grains of Kaolin retained in the interior of the shell.