摘要:
A fluid dispensing device includes a dispensing cylinder, a first inlet and a second inlet. The first inlet is disposed within a first container on which the fluid dispensing device is mounted. The first inlet and the second inlet are configured to facilitate intake of only one fluid into the dispensing cylinder at a given point in time. The fluid dispensing device also includes a first outlet and a second outlet. The first outlet and the second outlet are configured to dispense only one fluid out of the dispensing cylinder at a given point in time. The fluid dispensing device further includes a valve assembly fluidically coupled to the first inlet and the second inlet, and to the first outlet and the second outlet. The valve assembly is configured to control flow of the fluids within and/or out of the dispensing cylinder.
摘要:
A fluid dispensing device is provided. The fluid dispensing device includes a dispensing cylinder and a first inlet and a second inlet configured to facilitate intake of one of or more fluids into the dispensing cylinder. The first inlet is disposed within a first container on which the fluid dispensing device is mounted. The first inlet and the second inlet are configured to facilitate intake of only one fluid into the dispensing cylinder at a given point in time. The fluid dispensing device also includes a first outlet and a second outlet configured to dispense the one or more fluids. The first outlet and the second outlet are configured to dispense only one fluid out of the dispensing cylinder at a given point in time. The fluid dispensing device further includes a valve assembly fluidically coupled to the first inlet and the second inlet, and to the first outlet and the second outlet. The valve assembly is configured to control flow of the fluids within and/or out of the dispensing cylinder.
摘要:
Systems and methods for measuring RCS patterns of large targets in a compact target range having limited size. The present invention utilizes a compact range whose sweet spot (corresponding to the imaged area of the target) is much smaller than the target size. Inverse synthetic array radar (ISAR) images of successive sections of the target are registered to form a composite image of the whole target. The image is then Fourier transformed to generate an RCS value of the full target. This procedure is repeated for successive measurement angles, an RCS versus .theta. plot is generated corresponding to the RCS pattern of the target. The multiple images may be generated by translating the target and computing RCS plots of the target by combining the multiple images produced during translation, or generating the the multiple images by moving feeds or using multiple feeds of the ISAR system.
摘要:
A synthetic aperture radar (10) is employed for .DELTA.k measurement of ocean current from a spacecraft (11) without the need for a narrow beam and long observation times. The SAR signal is compressed (12) to provide image data for different sections of the chirp bandwidth, equivalent to frequencies f.sub.1 (t.sub.a,t), f.sub.2 (t.sub.a,t) . . . f.sub.n (t.sub.a,t), and a common area for the separate image fields is selected (14). The image for the selected area at each frequency is deconvolved (16) to obtain the image signals for the different frequencies (f.sub.1, f.sub.2 . . . f.sub.n) and the same area. A product of pairs of signals is formed (18, 20), Fourier transformed (22) and squared (24). The spectrum thus obtained from different areas for the same pair of frequencies f.sub.jk, f.sub.j+n,k are added (26) to provide an improved signal to noise ratio. The shift of the peak from the center of the spectrum is measured and compared (28) to the expected shift due to the phase velocity of the Bragg scattering wave. Any difference is a measure of current velocity v.sub.c (.DELTA.k).
摘要:
A single-frequency multibeam synthetic aperture radar for large swath imaging is disclosed. Each beam illuminates a separate "footprint" (i.e., range and azimuth interval). The distinct azimuth intervals for the separate beams produce a distinct Doppler frequency spectrum for each beam. After range correlation of raw data, an optical processor develops image data for the different beams by spatially separating the beams to place each beam of different Doppler frequency spectrum in a different location in the frequency plane as well as the imaging plane of the optical processor. Selection of a beam for imaging may be made in the frequency plane by adjusting the position of an aperture, or in the image plane by adjusting the position of a slit. The raw data may also be processed in digital form in an analogous manner.
摘要:
An airport runway incursion warning system for monitoring air and ground traffic at an airport. The system is optimally used with an aircraft that has an electronic tag or interrogation system that stores identification information regarding the aircraft, and an RF transponder for receiving interrogation signals and for transmitting the identification information in response thereto. A radar system comprises a plurality of radar sensor units disposed at predetermined installation sites adjacent to a runway. Each radar sensor unit typically has an interface processor and telemetry electronics for communication, although hard-wired communication paths may be used. An RF/telemetry interface is provided for communicating with the radar sensor units when the interface processor and telemetry electronics are used. The RF/telemetry interface is also used to transmit the interrogation signals to the aircraft and receive the identification information therefrom. A central processing unit is coupled to the radar sensor units for receiving and integrating radar data produced by each the radar sensor units to produce a map of the runway that identifies authorization objects and aircraft that do not constitute intrusion threats, and intruding objects that do constitute intrusion threats to the runway. The central processing unit is optionally coupled to the RF/telemetry interface for transmitting signals to and from the aircraft, and in this case, the central processing unit processes identification information received from the aircraft to integrate the identification information into to generate a displayed image. An operator display is coupled to the central processing unit for displaying the map and identification information generated thereby for use by an operator.
摘要:
A radar system and method employing a radar with an electronically scanned antenna array for estimating range and range rate to a target using angle cueing only. The radar transmits radar pulses at the target and searches the projection of the line-of-sight to the target on the ground for ground-bounce returns associated with each transmitted pulse. A processor coupled to the radar and processes the ground-bounce returns to determine an angle corresponding to the maximum reflected multipath ground-bounce return when the antenna array scans the ground. The angle data derived from processing the multipath ground-bounce returns permits computation of the range to and range rate of the target.
摘要:
Apparatus for detecting relative motion between a rough reflecting surface and a wave transmitting and receiving system in a plane parallel or perpendicular to the reflecting surface comprised of a transmitter (radar, laser, acoustic, and the like), a receiver having the same or different aperture as the transmitter, and means for detecting the finest interference fringes in the reflected wave pattern. Each fringe detected represents relative motion through a distance, S, that is a function of the maximum dimension, D, of the transmitting aperture. By counting fringes, total relative motion is determined, and by counting fringes for a unit of time, the rate of that motion is determined. For a small transmitting aperture, the distance, S, between fringes is directly related to kD in the parallel plane and to kD/tan .theta., in the normal plane, where .theta. is the angle between a reference axis normal to the reflecting surface and the axis of the receiving aperture, and k is a calibration constant equal to unity when the transmitting and receiving apertures are at the same distance, H, from the reflecting surface. For a large aperture, S.perspectiveto..lambda.H/kD in the parallel plane and S.perspectiveto..lambda.H/kD tan .theta. in the normal plane. In either plane, for the condition of k.perspectiveto.1, the spacing S.perspectiveto..lambda.H/D and S.perspectiveto..lambda.H/D tan .theta. can be measured with a linear scan array so that with .lambda., D and .theta. known, the distance H can be determined.
摘要翻译:用于检测平行或垂直于由发射器(雷达,激光,声学等)组成的反射表面的平面中的粗糙反射表面和波发射和接收系统之间的相对运动的装置,具有相同或不同的接收器 孔径作为发射器,以及用于检测反射波图案中最好的干涉条纹的装置。 每个检测到的边缘表示通过距离S的相对运动,S是发射孔径的最大尺寸D的函数。 通过计算边缘,确定总相对运动,并且通过对一个单位时间的边缘计数,确定该运动的速率。 对于小的发射孔径,条纹之间的距离S与平行平面中的kD直线相关,并且在正常平面中与kD /tanθ直接相关,其中θ是垂直于反射表面的参考轴与 并且k是当发射和接收孔径距反射表面相同距离H时的校准常数等于1。 对于大孔径,平行平面中的S&persp&lambda H / kD和正常平面中的S&persp&lambda H / kDtanθ。 在任一平面中,对于k&persp&1的条件,可以用线性扫描阵列测量间距S&persp&lambda H / D和S&persp&lambda H / Dtanθ,以便利用λ,D和θ知道距离H 可以确定。
摘要:
Apparatus for obtaining significant height information of ocean waves, or peaks of rough terrain utilizing means for compressing the radar signal over different widths of the available chirp or Doppler bandwidths, and means for cross-correlating one of these images with each of the others, where the center frequencies of the images have a spacing .DELTA.f.sub.rO. Upon plotting a fixed (e.g., zero) component of the cross-correlation values R.sup.E (.DELTA.f.sub.rO) as the spacing is increased over some empirically determined range, such as 0 to 1 MHz, the system is calibrated. Thereafter to measure height with the system, a spacing value is selected and a cross-correlation value is determined between two intensity images at a selected frequency spacing, such as 0.1 MHz. The measured height is the slope of the cross-correlation value determined to the spacing value used. Both electronic and optical radar signal data compressors and cross-correlations are disclosed for implementation of the system.
摘要:
A system and method for pricing software service requests is provided. The method includes entering input details corresponding to a clients' software service usage data. The method further includes calculating a cost per ticket for each severity level of the software service request. A margin for each severity level is assigned to each severity level in the order of increasing severity. Thereafter, a price per software service request is calculated for each severity level using the corresponding margin. Additionally, the method includes determining an optimal staffing scheme corresponding to one or more software services.