摘要:
Adjacent pixels of an infrared focal plane array (IR FPA) can be configured to have different spectral or polarization responses by adjustment of the lengths or orientations of the antenna arms which couple radiation into the sensors. The manufacturing costs of such an antenna-coupled IR FPA would be much less than integration of spectral or polarization filters onto each pixel, or fabrication of adjacent pixels with materials of different bandgaps. The antenna-coupled pixels can be made smaller than usual pixels, allowing this diversity of spectral or polarization information on the FPA without losing spatial resolution. The infrared (IR) sensors can be tunnel diodes, schottky diodes, photovoltaics, photoconductors, bolometers, and pyroelectrics. Application areas can include military and civilian remote sensing, automotive driving aids, industrial sensing, medical imaging, and general surveillance.
摘要:
A receiver (24) comprises a non-equalizing demodulator (48), an equalizing demodulator (46) and an output control selector (50). The non-equalizing demodulator (48) receives a modulated signal (44) and demodulates the modulated signal (44) to produce a first digital bit stream (54). The equalizing demodulator (46) receives the modulated signal (44) and equalizes and demodulates the modulated signal (44) to produce a second digital bit stream (52). The output control selector (50), coupled to the non-equalizing demodulator (48) and the equalizing demodulator (46), selectively delivers a first one of the first digital bit stream (54) and the second digital bit stream (52) for at least a predetermined period of time (30) before selectively delivering a second one of the first digital bit stream (54) and the second digital bit stream (52) responsive to a predetermined decision criterion (e.g., bit error rate 68). The first one of the first digital bit stream (54) and the second digital bit stream (52) is different from the second one of the first digital bit stream (54) and the second digital bit stream (52).
摘要:
A frame synchronizer for use in a receiver that receives an encoded signal from a transmitter includes a conjugation unit, a delay unit and multiplier coupled together to process the encoded signal. The multiplier multiplies either the received encoded signal by a conjugated, delayed version of the received encoded signal or multiplies a conjugated version of the received encoded signal by a delayed version of the received encoded signal to produce a first product signal. A further multiplier multiplies the first product signal with a locally-stored signal to generate a second product signal. An accumulator accumulates the second product signal over a plurality of bit times to generate an accumulated signal having a magnitude representing a time synchronization offset between the receiver and the transmitter and phase representing a frequency synchronization offset between the receiver and the transmitter. A synchronization correction unit generates a time offset correction and a frequency offset correction from the accumulated signal and these corrections are used to correct offsets between the receiver and the transmitter.
摘要:
Embodiments of a multi-purpose mounting device for mounting an electrical device to a structure coupled to an airborne object are provided. In one embodiment, the multi-purpose mounting device includes an adapter member and a slide member coupled to the adapter member. The slide member is radially spaced apart from the adapter member to form an open slot, which is configured to receive a portion of the external structural therein to secure the multi-purpose mounting device to the airborne object. A first mounting surface is provided on one of the adapter member and the slide member and configured to support the electrical device.
摘要:
A cover for a trash receiving open top container which is adapted to provide a shallow sloped surface leading to an opening that is sized to a dimension that is less than the smallest dimension of a tray on which trash is usually conveyed to be deposited in the container. The cover is needed to prevent the loss of trays into the container by persons who either allow a tray to slip into the container or simply shove the tray onto the cover and leave it unemptied. The cover is provided with a strengthened opening to prevent forceful insertion of a tray and it provides other openings to quickly drain off fluids and small items of trash.
摘要:
Apparatus and method are disclosed for testing winding terminations and more particularly for testing armature winding termination continuity. A nonrotating, simultaneous test is made of the armature winding terminations to commutator bars by simultaneously applying equal currents to different sets of bar-to-bar winding terminations. The differences in the bar-to-bar voltages of selected pairs of bar-to-bar terminations are obtained and a determination is made as to whether any voltage difference exceeds a reference limit. If not, then an acceptable continuity test indication is given.
摘要:
A TV monitor includes an antenna coupler capable of selectively coupling the TV receiver being monitored to an antenna or an r.f. oscillator. The oscillator is selectively operated to impose an r.f. signal onto the antenna input of the receiver between successive horizontal blanking periods on an active video line. One probe, connected to the horizontal retrace circuit of the receiver monitors the receiver for an "on" or "off" condition. A second probe, connected to the kinescope circuits of the receiver, detects the channel to which the receiver is tuned. A third probe, connected to the vertical retrace circuitry, detects the vertical retrace signal to determine when the r.f. signal is to be imposed onto the receiver's antenna input. By successively stepping the r.f. oscillator through successive frequencies within the bandwidth of individual channels, and by monitoring the kinescope probe for that frequency which compares to that generated, channel identification may be determined. A plurality of individual monitors may be utilized with individual receivers within a household and the data may be collected and stored in a household collector for eventual transmission to a central station.
摘要:
Embodiments of a multi-purpose mounting device for mounting an electrical device to a structure coupled to an airborne object are provided. In one embodiment, the multi-purpose mounting device includes an adapter member and a slide member coupled to the adapter member. The slide member is radially spaced apart from the adapter member to form an open slot, which is configured to receive a portion of the external structural therein to secure the multi-purpose mounting device to the airborne object. A first mounting surface is provided on one of the adapter member and the slide member and configured to support the electrical device.
摘要:
Methods and apparatus for countering a projectile according to various aspects of the present invention may operate in conjunction with a countermeasure system. The countermeasure system may comprise a beam source adapted to generate an electromagnetic beam. The countermeasure system may further include a beam control system adapted to aim the electromagnetic beam at the projectile according to a fire control solution. The beam heats at least a portion of the projectile to a disruption temperature to deflagrate the projectile.
摘要:
A processing device includes a ROM having program instructions and at leas one jump instruction stored therein, a patch program for patching the program instructions in the ROM, a RAM capable of storing the patch program and a patch vector table that indicates the location of the patch program. A processor executes the program instructions in the program ROM and uses the patch vector table to execute the patch program when one of the jump instructions is reached. The patch program may be stored in the RAM and the patch vector table may point to the address in the RAM at which the patch program is stored so that the processor jumps directly to the RAM to execute the patch program when it reaches the one of the jump instructions. Likewise, a patch engine may be used to locate a specified patch program, load the specified patch program into the RAM and execute the specified patch program when the processor reaches the one of the jump instructions.