摘要:
The present invention is an initial guidance system for a missile that haso other guidance or inadequate terminal homing guidance to lock onto a target at the time of missile launch. A laser beam projected from the missile launch station is aimed toward the target. Light from the beam is reflected in random directions (scattered) from aerosol particles that are ever present in the atmosphere. This scattered light strikes light detectors that are located on the sides of the missile. When the missile flies off the direction of the target, the amplitudes of impacting light on these detectors are different on different sides of the missile. Guidance controls activated by these amplitude differences cause the missile to veer toward the center of the beam and thus fly in a direction that is more toward the target.
摘要:
Methods and devices for enhanced energy storage in an electrochemical cell are provided. In some embodiments, an electrode for use in a metal-air electrochemical cell can include a plurality of nanofiber (NF) structures having high porosity, tunable mass, and tunable thickness. The NF structures are particularly suited for energy storage and can provide the electrode with exceptionally high gravimetric capacity and energy density when used in an electrochemical cell.
摘要:
An optically transparent cylinder having a hemispherical cavity at one endhereof and containing at least one light source and one light detector inside the hemispherical cavity utilizes the prismatic effect of the cylinder to locate an object in space. The light source and detector are located on a disk whose insertion depth into the cavity and tilt angle inside the cavity can be varied to control the sharpness, width and direction of the conical beam output from the cylinder, the beam searching the space for the location of the desired object.
摘要:
Dual field-of-view detection allows reflected energy from a target to be eived in one detector and extraneous reflected energy adjacent to the target area to be simultaneously detected in a separate detector. Comparison of the desired signal with a threshold level and with the detected extraneous energy level allows superior false alarm rejection while improving sensitivity by allowing reduced threshold levels for the true target. This dual detection in a single receiver allows the receiver to have two separate but immediately adjacent fields-of-view which interact with a transmitted beam to form a pair of adjacent sensing zones. A vehicle such as a missile equipped with this detection system can pass in close proximity to a target and distinguish a true target passing through the established sensing zone from extraneous background signals.
摘要:
The Side-Scatter Beamrider Missile Guidance System projects into the guidance field a pulsed beam that is spatially encoded with azimuth and elevation scans of pre-determined angles. This pulsed beam is indirectly relayed to side-looking missile-borne receivers by way of scattered radiation effected by atmospheric particles. Multiple optical receivers mounted on the exterior of the missile, each receiver having a different field-of-view from its adjacent receivers, receive light from the transmitting laser that is thusly scattered by atmospheric particles. In response to the received scattered radiation, the missile's signal processor calculates the missile's position within the guidance field by determining which of the receivers detects the scattered energy and when the detection shifts from that receiver to an adjacent receiver. Subsequently, steering commands are generated to guide the missile to or near the center of the guidance field, which center is normally coaxial with the target line-of-sight.
摘要:
The interferometric alignment device is a small, compact device that can be attached to any two optical instruments that need to be aligned precisely in both pitch and yaw angles. The device utilizes light reflecting from mirrors that are permanently mounted inside the instruments, one mirror in each of the instruments. The reflected light beams exit their respective instruments via a window built into the frame of the instrument and re-enters the attached alignment device wherein they combine to form an interference pattern. The operator of the alignment device observes the fringes of this pattern and adjusts the azimuth and elevation of one instrument relative to the other instrument until the fringes are at an acceptable minimum number or are eliminated altogether.
摘要:
The purpose of a system for measuring the location and orientation of an ect is to align one object with another by simultaneously measuring the six degrees of freedom of the objects. The system accomplishes the purpose by employing a linear optical detector array sensor on the first object and a pre-selected target pattern on a second object to measure the six degrees of freedom and converting them to six position measurement via a microprocessor which has suitable algorithms residing in it. The six position measurements (azimuth, elevation, range, pitch, yaw and roll) are displayed for viewing by the operator who, then, manipulates the objects until pre-determined desired values of the six position measurements are obtained, indicating a complete alignment between the objects.
摘要:
A linear detector array is positioned a fixed distance behind a narrow slotn an opaque mask. The array is oriented perpendicular to the slot as viewed from the "front", or direction of laser energy arrival. Light from the laser source, limited by the mask and slot, falls on only a few adjacent elements of the detector array, depending on the direction of arrival of the light. Further, since such crossed linear elements (slots and array) provide this measure of angle of arrival in the single direction perpendicular to the slot, two such systems of mask, detector linear array, and processing electronics may be employed (one rotated 90 degrees with respect to the other) to provide `vertical` and `horizontal` measurements of direction to the laser source.
摘要:
Apparatus for a beamrider missile guidance system in which a rotating rete wheel with a predetermined pattern of opaque and transparent segments is used to spatially encode a projected beam of electromagnetic radiation with the projected spatial information being used as a tone burst code with the frequency of the tone being proportional to missile position and the projected information being projected in two axes with appropriate timing of the burst for axis recognition.
摘要:
The scatterider guidance system is mounted on the flying object that is toe guided toward a more direct impact on the selected target. The system utilizes a designating beam of laser pulses that is emitted from the launch pad toward the target and atmospheric particles that scatter the laser pulses to calculate the guidance commands that lead the flying object to follow the laser beam closely. Upon detection by the scatterider sensors of the laser light that is scattered by the atmospheric particles, the perpendicular radial distance between the laser beam and the longitudinal axis of the object in flight is calculated by the onboard guidance electronics and subsequently used to generate the deflection commands. The deflection commands, in turn, are used to deflect aerodynamic control surfaces of the object such that the object approaches and stays close to the laser beam. This guidance system is activated as soon after launch as possible and continues until the object impacts on the target.