467results about How to "Quick capture" patented technology

A device that is useful for removing obstructions from vessels. Various embodiments and methods of use are contemplated for the effective removal of obstructions. The disclosed devices utilize a thrombogenic material to promote the formation of fibrin bonds, thus enhancing adhesion. It is further contemplated that the disclosed devices may be used in all vasculature including the cerebral vasculature and the neurovasculature.

A focus detection device includes an image sensor and a plurality of lenslets. Each of the plurality of lenslets has a distinct conjugate length and is associated with a distinct portion of the image sensor.

A method and system for biometric identification utilizes structured light (e.g., fine grid) that is projected to the target objects (fingers and palm). The image with structured light on the object contours can give 3D information of the objects with resolution to satisfy NIST fingerprint standard. In embodiments, the structured light can be of different color, to reduce the burden of the software processing. To enhance the capture speed, a model with 2D image on “smooth” 3D surface can be used. In this “2.5-D” case, the finest feature of the structured light can be as big as millimeter size. Although grid-structured light can satisfy current requirement of fingerprint and palm print capture standards, in other embodiments, a customized structure based on the initial scan result can give optimal result on the 3D data. This may be useful when higher resolution is desired.

The present invention discloses a low signal-to-noise ratio short preamble burst signal demodulation system and method. A burst signal detection module detects in real time whether a received signal includes an MPSK signal, if the received signal includes the MPSK signal, an initial position and an ending position of the MPSK signal are offered; then, a coarse frequency synchronization and time synchronization module realizes time synchronization point tracing and coarse frequency offset correction of the signal according to the preamble of the burst signal and the initial position of the MPSK signal; then, sampling timing synchronization and fine frequency offset compensation and phase offset correction are respectively performed by a timing synchronization module and a fine frequency synchronization module on the signal; and finally, a phase unwrapping and de-mapping module completes phase unwrapping and bit decoding. According to the method, time synchronization of the demodulation system is before timing sampling synchronization, a parameter estimation module is reused, while the processing time is not increased, the accuracy of coarse frequency estimation and time synchronization is greatly improved, and hardware resource consumption is reduced greatly.

The invention provides a double-antenna GNSS (Global Navigation Satellite System)/INS (Inertial Navigation System) deeply integrated navigation method and device. The device comprises a power supply module, an MEMS (Micro Electro Mechanical System) inertial measurement unit, a radio frequency module, an FPGA (Field Programmable Gate Array) module, a DSP (Digital Signal Processor) module and at least two antennas. According to the device, with the assistance of an INS, the probability of cycle slip of the GNSS can be reduced effectively, the integer ambiguity searching space of the GNSS is reduced, attitude measurement information is guaranteed to be continuously outputted, and the tracking loop robustness of the GNSS is enhanced; and with the assistance of a double-antenna GNSS, quick initial alignment of the INS can be realized, the attitude observability of the INS is improved, and the attitude divergence of the INS is inhibited.

A viewer for viewing stereo images either downloaded over a network, such as the Internet, or resident on a personal computer uses a graphical user interface (GUI) to facilitate the display of wireframes with or without texture applied in a variety of formats. In stereo mode, the GUI permits adjustment of the neutral plane and of camera offset. The file sizes utilized with the viewer are very small and permit rapid transmission over a network. The files contain wireframe information, texture map information and animation information.

The invention discloses functional fatty powder and a preparation method thereof, and belongs to the technical field of feeds. The functional fatty powder is characterized in that raw materials comprise the following components in parts by weight: 30-50 parts of concentrated omega-fatty acid fat, 10-20 parts of lecithin, 8-15 parts of concentrated linolenic acid fat, 8-15 parts of MCT, 1-5 parts of choline, 1.5-5.5 parts of nicotinamide, 1-5 parts of a composite emulsifying agent, 3-8 parts of a composite antioxidant, 2-8 parts of vitamin C, and 40-70 parts of encrusting substances or 30-60 parts of carriers. The functional fatty powder provided by the invention is small in addition quantity, high in cost performance ratio, good in stability, high in nutrient value and high in fat utilization rate; the functional fatty powder not only can greatly improve the growing property and the reproductive property of animals but also can improve the immunity of the animals and promote the development of animal organisms, so that the functional fatty powder is an excellent feed additive.

The invention discloses a high-sensitivity satellite navigation signal capturing method and a system. The system comprises a digital down-conversion module, an average sampling and block accumulation module, an FFT (fast Fourier transform) module, a circumference shifting module, a local PRN (pseudo random noise) code FFT conjugate memory, a complex multiplier module, an IFFT (inverse fast Fourier transform) module, a differential coherence integration module, a peak detection module and a sequential control module. The digital down-conversion module realizes digital down-conversion operation for satellite digital intermediate frequency signals; the average sampling and block accumulation module averagely samples satellite data and completes a block accumulation function; the FFT module searches code phase frequency domains; the circumference shifting module utilizes Doppler circumference shifting search to replace frequency compensation; the local PRN code FFT conjugate memory stores a local PRN code FFT conjugate result; the complex multiplier module realizes signal de-spreading; the IFFT module calculates different code phase coherence results; the differential coherence integration module accumulates differential coherence energy of de-spread satellite signals; the peak detection module realizes signal capturing output; and the sequential control module controls timing sequence of the various modules of the system. Weak signal capturing speed and sensitivity of a satellite navigation receiver are improved, and parameters can be configured flexibly.

The invention provides an airborne laser communication equipment and a control method thereof. Beacon light and source light are received by the same receiving antenna, separated, processed and transmitted to a control module, pitch and azimuth angles of equipment are regulated on the basis of received beacon light and source light signals, signal tracking is performed, and fed-back beacon light and source light signals are transmitted through two different transmitting terminals, so that exchange work of signals of both sides is guaranteed. The airborne laser communication equipment and control method thereof solve the technical problems that the communication speed and the image resolution cannot meet requirements and wide coverage and real-time transmission cannot be guaranteed simultaneously in the prior art.

Whole Doppler range of signal is divided into frequency sweep points. Using united non-coherent detecting energy in parallel de-spread on all frequency sweep points, the method finds out maximum value. Comparing the maximum value with referenced threshold determines whether signal is captured, and carrier frequency and phase of de-spread code. Under limited resources, the method avoids complex calculation, and realizes quick capturing signal. In condition of large frequency deviation and high dynamic signal, the invention guarantees stable, high performance quick operation in whole dynamic range. The invention is applicable to area of satellite communications and wireless communication based on spread spectrum.

The invention provides a method for quickly acquiring GPS signals and a GPS signal quick acquiring system which comprises the method. The main hardware parts of the system mainly comprise a quick acquisition module; the quick acquisition module acquires the GPS signals in parallel in large scale, obtains the initial phase and frequency information of the GPS signals and sends the signals to a correlator; and the correlator completes the carrier removal correlation of corresponding phase and frequency, and then accumulates the data and saves the data in a register. A microprocessor schedules the assembly lines of the quick acquisition module and the multi-channel correlator, simultaneously distributes the satellite number of the next quick acquisition module, confirms the data given by the channels of the correlator by quick detection algorithm processing so as to quickly and accurately acquire the GPS signals.

The invention discloses a ground-space-based integral measurement and control system applied to a terrestrial space. The system includes a ground measurement and control station; a relay satellite; anair vehicle including an upper antenna, a lower antenna, a radio frequency front end, a transceiving assembly and an air vehicle management computer, wherein the upper antenna and the lower antenna are used for receiving and transmitting of ground-base uplink and downlink signals and space-based forward and backward remote control signals; the radio frequency front end is used for performing filtering hybrid amplification on signals and outputting the signals; the transceiving assembly is used for conversion through modulation and demodulation and for receiving CCSDS remote measurement framesor acquiring positioning information according to remote measurement parameters of the transceiving assembly itself and calculating the optimal direction transmission of the space-based forward remote control signals; the air vehicle management computer is used for transmitting the received positioning information and the calculated optimal direction of the space-based forward remote control signals to the radio frequency front end for transmission switching between the upper antenna and the lower antenna and transmitting selected space-based backward remote control signals to the relay satellite. According to the invention, a ground-based and a space-based remote measurement and remote control links can be implemented at the same time and whole course coverage of flight tasks is realized.