204results about "Proximity fuzes" patented technology

A fuzing system for non-spinning or substantially non-spinning weapons is implemented by means of wide angle optics providing at least forward-hemisphere coverage, an array of infrared detectors and a microprocessor for image and data processing, aim-point selection, directional-warhead aiming and skewed-cone fuzing. The skewed-cone fuzing has a generatrix which is the vector sum of missile velocity, warhead velocity and the negative of target velocity.

A proximity sensor for use with a guidance system of a smart bomb including a ranging radar proximity sensor configured for mounting on a smart bomb and a radome connected to the ranging radar proximity sensor. A laser radiation sensor system is attached to the proximity sensor, which is configured and arranged to detect laser radiation reflected from a target which passes through the radome and output the azimuth and elevation angles to the target to the guidance system.

In one aspect, an artillery projectile apparatus is provided that includes a carrier projectile containing a payload, and a fuze disposed at an ogive of the projectile and which is configured to eject the payload when the fuze is detonated. The fuze includes a receiver configured to receive location information from a radionavigation source and a processor configured to acquire position data from the receiver. The processor is also configured to estimate a projectile flight path using the position data, to determine intercept parameters of the artillery projectile relative to an ejection plane of its payload cargo, and to adjust an ejection event initiation command time of the payload in accordance with the determined intercept parameters. In some configurations, the present invention dramatically decreases range errors typically associated with delivering artillery payloads to specific targets.

The present invention is a game set for use in an object throwing game in which projectiles are rolled, tossed or otherwise moved towards a target object. Each projectile includes a distance measuring means disposed within the projectile that can send and receive signals from a control device. The distance measuring system including the measuring means and the control devices allow for an individual or individuals playing the game to measure in a highly accurate manner the positioning of the projectiles with regard to the target object and with regard to one another in order to determine the exact locations of the projectiles, and which projectile or projectiles are positioned closer to the target object than the remaining projectiles. All information regarding the distance between the projectiles and the target object can be received and displayed on the control device for easy administration of the game.

A wireless or partially wireless detonator assembly (10) and corresponding blasting apparatus, that may be “powered Up” by a remote source of power (13) that is entirely distinct from the energy used for general command signal communications (16). In one embodiment, the detonator assembly (10) may include an active power source (25) with sufficient power for communications, but insufficient power to cause intentional or inadvertent actuation of the detonator (10).

A vehicle-borne system for countering an incoming threat, the system including a sensing device configured to sense an incoming threat, and an active protection system including a maneuverable interceptor incorporating a plurality of kinetic energy rods and an aimable explosive charge configured to deploy the kinetic energy rods in a predetermined direction; the active protection system further including a detection subsystem configured to maneuver the interceptor to intercept the incoming threat, the detection subsystem further configured to determine if the interceptor will miss the threat, and then initiate the explosive charge to aim the kinetic energy rods into a disbursed cloud in the trajectory path of the incoming threat and between the incoming threat and the vehicle.

Composite material, devices incorporating the composite material and methods of forming the composite material are provided. The composite material includes interstitial material that has at least one of a select relative permittivity property value and a select relative permeability property value. The composite material further includes inclusion material within the interstitial material. The inclusion material has at least one of a select relative permeability property value and a select relative permittivity property value. The select relative permeability and permittivity property values of the interstitial and the inclusion materials are selected so that the effective intrinsic impedance of the interstitial and the inclusion material match the intrinsic impedance of air. Devices made from the composite include metamaterial and/or metamaterial-inspired (e.g. near-field LC-type parasitic) substrates and/or lenses, front-end protection, stealth absorbers, filters and mixers. Beyond the intrinsic, applications include miniature antenna and antenna arrays, directed energy weapons, EMI filters, RF and optical circuit components, among others.

The invention provides a blasting system which includes a plurality of electronic detonators which are configured in a blast array which has at least one row and a plurality of detonators in the row, each detonator including a memory in which is stored at least a respective identity code which is dependent, at least, on the row on which the detonator is, and on the detonator's position in the row, a harness which interconnects the detonators, and at least one control unit, connected to the harness, which generates a signal to fire the detonators.

The invention discloses a blasting system, which comprises a remote controller and at least two wireless digital electronic detonators. The remote controller and the wireless digital electronic detonators are directly or indirectly communicated through a wireless signal, and the wireless digital electronic detonators comprise a wireless signal transceiver which is used for receiving instruction information sent by the remote controller, and the instruction information comprise detonating information; and the wireless digital electronic detonators work and detonate through work voltage and firing voltage according to the received detonating information. The invention also provides a communication method of the blasting system. According to the invention, the security and the reliability ofthe blasting system in the blasting work can be improved, an organized wireless digital electronic detonator network benefits the successful transmission of the wireless signal, the possibility of misoperations is reduced, a programmer and an exploder in the work process can be recycled, and the work trash after the blasting can be reduced at the same time to benefit the environment protection.

A passive proximity fuze. The inventive fuze (10) is adapted to be mounted on a munition (11) and includes a receiver (16) adapted to lock on to a signal transmitted by a target transmitter (12). The receiver (16) detects a Doppler shift in the signal as the munition approaches the target. When a closest point of approach is reached the Doppler shift changes from increasing to decreasing. The inventive fuze (10) includes a mechanism for detecting this change in the Doppler shift and provides a detonation signal in response thereto. In the illustrative embodiment, the receiver (16) is an FM receiver. The mechanism for detecting a change in the Doppler shift may be implemented with discrete analog circuitry or digital circuitry. In an illustrative analog implementation, first and second resistive/capacitive networks (R1C1 and R2C2) are employed to compute a second derivative of the Doppler shift signal output by the receiver (16). This signal is then amplified and thresholded to provide the output detonation signal. In an illustrative digital implementation, the output of the receiver (16) is converted to digital and processed by a digital signal processor (26). The DSP 26 computes the second derivative of the Doppler shift signal output by the receiver (16) in response to a stored program for computing same. The output of the DSP is the detonation signal. Hence, detonation is achieved at the closest point of approach of the munition (11) to the target (12) with an inexpensive passive solution (10).

A system (10) for determining the range between a missile (14) and a target (18) adapted for use with a semi-active missile system. The system (10) includes a first circuit (12) for generating a periodic signal (24) that is periodically frequency modulated. A second circuit (16) determines a closing rate at which the missile 14 is approaching the target 18 via the periodic signal 24. A third circuit (16) determines a value containing information corresponding to the range and the closing rate via the periodic signal. A fourth circuit (16) determines the range from the closing rate and the value. In a specific embodiment, the first circuit (12) includes an illumination system (12). The illumination system (12) includes a periodically modulated carrier signal generator (32) that generates the periodic signal (24). The periodically modulated carrier signal generator (32) includes a frequency source, a frequency modulator, and an illumination system computer. The illumination system computer runs software for adjusting the modulation parameters of the frequency modulator. The second, third and fourth circuits (16) are included in a receiver system (16) onboard the missile (14). The receiver system (16) includes a front receiver located near the front of the missile and a rear receiver located near the rear of the missile (14). A receiver system computer runs software that implements the fourth circuit (16). The receiver system (16) includes a local oscillator for providing a reference frequency for the receiver system. The local oscillator derives the reference frequency from the periodic signal provided by the first circuit. In illustrative embodiment, the fourth circuit (16) runs computer software that subtracts the closing rate from the combination of closing rate and range and provides the range in response thereto.

A marking projectile comprises separate compartments that break during launch due to rotation of the projectile as it leaves the barrel of a weapon. Metal pellets contained within the compartments are pressed outward and pierce the compartment walls. This allows for mixing of chemical materials contained within the compartments, so that the materials substantially react by the time the projectile strikes a target. The chemical materials may be a pair of chemi-luminescent components, or components that create heat for thermal marking.

The invention discloses a pseudo-random code system-based laser fuze system and a target identification method thereof. The laser fuze system adopts a six-quadrant detection scheme, and each pair of detection transceiver systems comprises a pseudo-random code generator, an excitation circuit, a laser, a detector, a signal processing circuit, and transmitting and receiving optical systems; the pseudo-random code generator is used for generating a pseudo-code signal with certain code element width and frequency, the pseudo-code signal is modulated to obtain a pseudo-code pulse signal meeting the requirement of pulse width of the laser, and the pseudo-code pulse signal is excited by the excitation circuit to drive the laser to transmit encoded laser pulse; finally, a laser beam irradiates to a target after being collimated or extended by a transmitting optical system, and the optical energy reflected from the target is received by the receiving optical system; meanwhile, the filtering of a filter and the focusing of the light beam are completed, and after the detector completes the photoelectric conversion and the signal preprocessing of the signal processing circuit, an echo pseudo-random coded signal is obtained after threshold comparison.

A radar sensor is described that includes a radar transmitter, a radar receiver configured to receive reflected returns of signals output by the radar transmitter, and a signal processing unit configured to process signals received by the radar receiver. The signal processing unit includes a comparator, a first filter comprising an output coupled to a reference input of the comparator, and a second filter comprising an output coupled to a signal input of the comparator. The first and second filters are configured to receive a common input related to the reflected returns. The first filter is configured to have a time constant such that a rise time of the first filter output is faster than a rise time of the second filter output.

A munition article is to be provided with an antenna which, by virtue of a characteristic which is uniform all around, permits interference-free reception of items of satellite navigation information, even if in the manner of an artillery projectile it is fired with spin along an elongate ballistic trajectory, so that a tail antenna with a spherical characteristic does not allow the expectation of good reception factors in relation to navigation satellites which are as high as possible above the horizon. Therefore the tip (10) of the fuse tip (11) of the projectile is equipped with a dipole satellite antenna which faces in the direction of flight. Connected to the dipole (13) which is arranged concentrically with respect to the longitudinal axis (14) of the projectile are symmetrically disposed conductor portions (15) which rest with a close fit in recesses (19) in the ballistic cap (12).