196results about How to "Increase the number of channels" patented technology

Exemplary embodiments provide systems and methods for portable medical ultrasound imaging. Preferred embodiments utilize a tablet touchscreen display operative to control imaging and display operations without the need for using traditional keyboards or controls. Certain embodiments provide ultrasound imaging system in which the scan head includes a beamformer circuit that performs far field sub array beamforming or includes a sparse array selecting circuit that actuates selected elements. Exemplary embodiments also provide an ultrasound engine circuit board including one or more multi-chip modules, and a portable medical ultrasound imaging system including an ultrasound engine circuit board with one or more multi-chip modules. Exemplary embodiments also provide methods for using a hierarchical two-stage or three-stage beamforming system, three dimensional ultrasound images which can be generated in real-time.

The invention relates to an ultra high-speed optical analog-to-digital conversion device. The ultra high-speed optical analog-to-digital conversion device comprises a high-speed pulse laser, a frequency spectrum broadening module, a repetition frequency multiplication module, an ultra wide band signal sampling module, a wavelength multi-channelizing module, parallel photoelectric conversion modules, parallel electric quantization modules and parallel data processing modules, wherein the high-speed pulse laser, the frequency spectrum broadening module, the repetition frequency multiplication module, the ultra wide band signal sampling module, the wavelength multi-channelizing module, the parallel photoelectric conversion modules, the parallel electric quantization modules and the parallel data tprocessing modules are sequentially connected. According to the ultra high-speed optical analog-to-digital conversion device, the high-speed pulse laser and the wavelength-division multiplexing technology are combined, while the advantages that the wavelength-division multiplexing technology is simple and practicable are kept, the defect that the output frequency spectrum of an active mode-locking fiber laser is narrow is overcome through the frequency spectrum broadening technology, high-speed photoelectric sampling is carried out through a broadband 1*2 electro-optical modulator, and by increasing the number of wavelength-division multiplexing channels or the number of parallel channels of the system, the bandwidth of a photoelectric detector and the sampling rate of an electric analog-to-digital converter are not increased while the sampling rate of the system is improved.

The invention relates to a multi-channel high precision phase control signal generation device which utilizes a programmable read-only memory to generate a customized special circuit in an FPGA (Filed Programmable Gate Array) circuit through a VHDL (Very High Speed Integrated Circuit Hardware Description Language) language programming. The multi-channel high precision phase control signal generation device comprises a phase shift module, a phase coding module, an address coding module and a plurality of multi-channel gates. By taking a high precision active crystal oscillator as an information source, all multi-channel gates works in parallel to receive phase control signals of a host computer and output square wave signals of a multi-channel special phase. The output square wave signals access resonance of a power amplifier to generate sine wave signals with the same frequency and phase with the traditional output signals and the sine wave signals are used for excitation signals of an ultrasonic transducer array element in a phase control type high intensity focusing ultrasonic treatment system; and the frequency of the crystal oscillator is determined by the resonance frequency and the phase control precision requirements of the ultrasonic transducer array element. The invention dramatically increases the channel amount of the phase control signals and enhances the precision of the phase control signals, thereby satisfying the needs of the high intensity focusing ultrasonic treatment system.

The invention discloses a calibrating module for the sampling time error of a TIADC (Time-interleaved Analog To Digital Converter). The TIADC comprises a data conversion module and a data composition module, wherein the data conversion module consists of M channels comprising M sample hold circuits and M sub channel ADCs (Analog To Digital Converter); a reference channel is arranged on the data conversion module in parallel, so that a data conversion module with the reference channel is formed; the reference channel is formed by connecting one sample hold circuit with one single-bit reference channel ADC in series; the calibrating module is arranged between the data conversion module with the reference channel and the data composition module and consists of M auto-correlation operation modules, a memory, (M-1) differential modules and (M-1) error compensation modules. The calibrating module disclosed by the invention is suitable for calibrating TIADC systems of any channel and signals within the whole Nyquist sampling frequency, simply acquiring relative sampling time error among all the channels and efficiently compensating the relative sampling error, so that the calibration of the time error among the channels can be quickly and accurately realized at lower hardware overhead.

The invention provides an image processing method and an image processing device, which are realized by using a field programmable gate array (FPGA), of a neural network algorithm for image processing. The image processing method comprises the steps that a first convolution calculation unit performs a first layer of convolution calculation on input image data so as to generate a first layer of feature data; the first layer of feature data is stored into a storage unit; and a second convolution calculation unit reads the first layer of feature data from the storage unit, and executes a preset number of layers of convolution calculation and generates a convolution calculation result for the input image data, wherein the corresponding calculation result is stored into the storage unit at the end of each layer of convolution calculation, and the first convolution calculation unit and the second convolution calculation unit are configured by the field programmable gate array.

The invention provides a hydrogenation catalyst preparation method and application of hydrogenation catalyst in selective hydrogenation reaction. Aluminum oxide is utilized as a carrier; the hydrogenation catalyst is prepared from boehmite; cane sugar, glucose and soluble starch are added into carrier precursor in a preparation process to serves as structural aids and are roasted in inert atmosphere and air sequentially, and roasting temperature is 450 to 1000 DEG C. Active ingredients of the catalyst are loaded by an impregnation method, and the active ingredients are chosen from alloy which is prepared from one or several of metal Ru, Pd and Pt and one or several of Cu, Ag and Au. The catalyst can be applied to olefin preparation by alkyne selective hydrogenation reaction.

The invention relates to a multi-channel synchronizing signal generator based on field program gate array (FPGA) and an AD9959. The multi-channel synchronizing signal generator comprises a remote personal computer (PC) (1), a storage module (2), a clock generator (3), an FPGA chip (12), a signal preprocessing module (9), a universal interface module (10), a digital frequency generation module (11) and a user-operated front panel (13), wherein the FPGA chip (12) is respectively connected with the remote PC (1), the storage module (2), the clock generator (3), the signal preprocessing module (9), the universal interface module (10), the digital frequency generation module (11) and the user-operated front panel (13); and the signal preprocessing module (9) is connected with the digital frequency generation module (11). Compared with the prior art, the multi-channel synchronizing signal generator has the advantages of simple circuit structure, high application value and the like.

The invention relates to a photon correlator based on a field programmable gate array (FPGA), which is used for obtaining scattered light signal autocorrelation function in photon-correlation spectroscopy granulometry technology and is mainly composed of a synchronous reset module, a photon counting module, a correlation algorithm module and a computer interface module, wherein the photon counting module carries out the evenly spaced counting for photon signal period of a photon detector and sends the result to the photon correlation algorithm module to obtain a correlation function; the computer interface module sends the result to the computer. The invention realizes the high-speed photon correlator based on the field programmable gate array (FPGA) and expands the number of channels of the correlator and dynamic range time in a multi-disc FPGA cascading mode.

A silicon-based integrated on-chip multimode optical switching system compatible with wavelength division multiplexing signals comprises a multimode optical switching array, N groups of wavelength division-mode division multiplexing optical signal transmitting and receiving systems, and a peripheral driving circuit system, an electrical serial-parallel conversion and parallel-serial conversion system and a high-speed data input and output electrical bus which are used for supporting the system on the chip. According to the system, high-speed serial electric signals generated by data processing nodes are converted into parallel multi-channel electric signals to be input; the optical signal is converted into an optical signal through a modulator array and is loaded on an optical carrier wave of which the wavelength and the mode are multiplexed together; the optical signals enter the multi-mode optical switching array through the multi-mode waveguide input port, are demultiplexed into optical signals of multiple channels after reaching the target port, are converted into parallel electric signals through the photoelectric detector, and are finally reduced into high-speed serial signals to be provided for a data node of the target port for use. The system has the characteristics of low energy consumption, high bandwidth and low delay. The data input interface and the data output interface are both electric domains and are compatible with data interfaces of various existing processors.

The invention belongs to the field of microwave radio frequency, and particularly relates to a multi-path microwave phase stable transmission method and device. By aiming at the problems in the prior art, the invention provides the multi-path microwave phase stable transmission method and device. Wavelength division multiplexers are adopted, and a double-wavelength vector method is used for completing the stable phase transmission of single-path microwave signals. If the path number of the wavelength division multiplexers is N (N is an even number), the stable phase transmission of N / 2 paths of microwave signals can be realized. Fourth microwave modulation optical signals of light carriers Lambda2 are separated out through the first wavelength division multiplexer, and phase error signals between the other path of microwave signals output by a first power divider and the fourth microwave modulation light signals of the light carriers Lambda2 separated out by the first wavelength division multiplexer are extracted out through a feedback unit; the feedback unit sends the phase error signals into the regulating end of the phase correcting unit, and a whole optical fiber transmission link is subjected to phase compensation, so that stable phase transmission of signals between the microwave input signals and the microwave output signals can be realized.

A data transmission device which supports the multi-channel data transmission comprises a multi-channel interface which proceeds the data transmission between the sending equipment and the receiving equipment, a sending side sustained storage, a receiving side sustained storage and a sending unit. The sending equipment and the multi-channel interface are connected with the sending side sustained storage, which puts the output data from the sending equipment into the sending side sustained storage according to the channel and sends the data in the sending side sustained storage to the multi-channel interface according to the flow control dispatching information of each channel. The receiving unit is connected with the multi-channel interface, the receiving side sustained storage and the receiving equipment, which puts the output data from the multi-channel interface into the receiving side sustained storage to wait to be transmitted into the receiving equipment and produces the corresponding flow control information based on the sustained storage data capacity of each channel in the receiving side sustained storage. The present invention also comprises the corresponding method of the data transmission of the data transmission device. By using the out sustained storage the present invention efficiently extendeds the quantity of the channel which is supported by the multi-channel interface such as the SPI4.2 and avoids the phenomena of the team joint block.

The invention discloses a space division multiplex system suitable for free space optical communication. The system comprises a sending end device and a receiving end device for communication with the sending end device through a free space. The sending end device comprises a first fourier transform lens, a light combiner and n first spatial light modulators. The receiving end device comprises a second fourier transform lens, a second spatial light modulator and a third fourier transform lens which are arranged in sequence. Space phase factors are attached to signal light beams through the spatial light modulators, the first spatial light modulator is used as a signal modulator, the second spatial light modulator is used as a signal modulator, the light combiner enables a plurality of channels to be combined for transmission, and the fourier transform lenses are used for carrying out space fourier transform on light fields, so that a back focal plane output light field is the fourier transform mode of a front focal plane output light field. The space division multiplex system is simple in structure, low in cost, and easy to achieve, and optical communication capacity is improved in another dimension.

The invention relates to a rinsing air purification technology and in particular relates to a cold-hot type rinsing air purification device using a multilayer staggered spray mode. The cold-hot type rinsing air purification device using the multilayer staggered spray method comprises a water storage tank, a spray tank, a water supply pipe, a water pump and an exhaust fan, wherein the water storage tank comprises a wastewater storage tank, a clear water storage tank, an electronic refrigerator, an electronic heater, an isolation plate and a wastewater filtration screen; the spray tank comprises a spray tank shell, a spray plate, a spray pipe, an air inlet, an air outlet and an air filtration screen; the spray plate, the spray pipe, the air inlet, the air outlet and the air filtration screen are arranged in a tank body; due to the adoption of the multilayer staggered spray method and a curve air flowing path, an equipment resource can be used to the greatest extent; air is fully sprayed and washed, so that the best purification effect can be achieved; the temperature of the air in a room can be adjusted according to the requirement during purifying of the air; the device can be used as an indoor moving air purifier, can be mounted on the wall to be used as an air purification window, and can be applied to spray purification towers for purifying industrial waste gas generated during waste incineration; the defects that a filter element is blocked and parts are frequently replaced can be avoided.

The invention provides a high-precision temperature collecting circuit based on NTC temperature sensors and a method. The circuit comprises an NTC temperature sensor array, a voltage stabilization source, an AD converter, a controller, an external interface, a standard resistor array, a first switch array and a second switch array, and the first switch array and the second switch array are communicated with one standard resistor in the standard resistor array and one NTC temperature sensor in the NTC temperature sensor array respectively. The AD converter is used for collecting voltage dividing signals between the communicated standard resistor and the communicated NTC temperature sensor and carrying out analog-digital conversion. The controller is used for providing switch selecting signals and calculating the temperature values of the NTC temperature sensors. The external interface is used for providing collected data for external equipment. The circuit can obtain good precision within a wide collecting temperature range, and is low in development cost and easy to implement.

The present invention applies to the field of mobile terminals, and provides an antenna switching system and method. The antenna switching system comprises a radio frequency transceiver circuit, a main antenna and a parasitic antenna. The main antenna is connected to the radio frequency transceiver circuit. The antenna switching system also comprises a switch circuit, used for connecting the parasitic antenna to the radio frequency transceiver circuit, when the parasitic antenna is being used to receive or transmit a radio frequency signal. If the parasitic antenna is connected to the ground, the parasitic antenna may be used for spreading. In addition, when carrier aggregation is required, the parasitic antenna is connected to the radio frequency transceiver circuit, becoming an independent receiving or transmitting antenna. In this way, no new antennae are added, only a main antenna and a parasitic antenna included in an existing mobile terminal are used, and the effect of increasing the number of paths for receiving or transmitting a radio frequency signal is achieved.

The invention discloses a method and device for highly precisely measuring the single-channel signal pulse width through an FPGA. A delay chain is formed by at least one carry line resource in the FPGA, each carry line resource is provided with a plurality of taps, one part of taps output the state information, on the delay chain, of rising edges of measuring signals, and the other part of taps output the state information, on the delay chain, of falling edges of the measuring signals; the state information of the rising edges and the state information of the falling edges are selected through a multiplexer and input to a decoding unit to be decoded. The method and device have the advantages of being high in measurement precision, low in resource consumption and high in universality.

The invention provides an automatic compensating circuit for uncooled semiconductor laser wavelength temperature-following drift. The circuit comprises an uncooled semiconductor laser and a thermistor; the thermistor is connected with a tuning section of the uncooled semiconductor laser; and the circuit is driven by a constant voltage source or a constant current source. The circuit automatically compensates the uncooled semiconductor laser wavelength temperature-following drift for optical communication by adopting a simple and effective method. Compared with other technology aiming at the problem, the circuit does not need to add a control circuit system to adjust the wavelength, and does not need to measure the temperature of the laser so as to greatly reduce the complexity and cost of an uncooled optical transmitter module, meet the requirement of a CWDM for implementing a more economic and more practical optical network and increase the available channel number and total transmission rate of the CWDM network at the same time.

The invention provides an underwater target azimuth estimation method based on a bat binaural positioning model. According to the frequency band of a transmitting signal, a binaural positioning model parameter suitable for processing a hyperbolic frequency modulation signal is calculated, combined with the theoretical positions of interference peak and valley points in an echo signal, an external ear valley value frequency interval and the frequency response of an acoustic transducer are determined, and finally the azimuth of a target is calculated according to the external ear valley value frequency calculated by the model. According to the underwater target azimuth estimation method, the azimuth discrimination of the binaural positioning model is improved, thus an active sonar can achieve good azimuth discrimination in the condition of double array elements, and the performance is much better than that of a conventional beamforming method.

This invention relates to a method for building media file system, which belongs to the computer storing technique field of multimedia files. The existing file system can't satisfy the request for real time under the read-write operation, especially under the environment that has multi flows. The property of media file storing system is also affected strongly by using standard file format; such file format sometimes doesn't support the flow transmission, and it produces the hard disk shiver easily. Wherein the media file system which relates to this invention brings forward the picture group as the basic unit of disk read-write through integrating those correlative multi media files information into the media file system, which avoids the limitation in traditional file system.

The invention discloses a multifunctional high-flux automatic chromatography detector and applications thereof in the technical field of biomedical science. The chromatography detector includes a shell, a chromatographic system, a mechanical system, a detection system and an analysis system; the chromatographic system includes a chromatographic device and a chromatographic assembly; the side wallof the chromatographic device is provided with one or more channels, and the chromatographic assembly is installed in the channels; the mechanical system includes a pedestal, a motor, a photoelectricswitch and a clamping groove, wherein the clamping groove is used for installing the chromatographic device, and the photoelectric switch is used for locating the chromatographic assembly; the detection system includes a light source, a detector and a circuit board, and is used for capturing and detecting signals sent by the chromatographic assembly; the analysis system includes software and hardware equipment used for installing the software, and is used for the sorting, collecting, analyzing and storing the data; and the chromatography detector can be packaged by the shell. The chromatography detector can realize qualitative and quantitative detection based on the results of chromatography having principles of visible light, Raman, time-resolved fluorescence, fluorescence, chemiluminescence, up-conversion luminescence, etc.

The invention provides a phase control method used for large array element coherent combination. The phase control method is characterized in that a modulation signal of a phase control algorithm is subjected to orthogonal coding and single-frequency modulation; compared with a multi-dithering algorithm, debugging signals with a plurality of frequencies are not needed, so that the algorithm is simplified and hardware is convenient to realize; compared with a single-dithering algorithm, the quantity of paths subjected to phase debugging within a certain time period is increased and the control bandwidth is improved. The invention further provides a phase control circuit used for the large array element coherent combination; the phase control circuit comprises a programmable chip 1, a digital to analog converter 3, a control signal conditioning circuit 4, an analog to digital converter 5 and an input signal conditioning circuit 6, and is characterized by further comprising a multiplexer 2. Under the condition that the number of output pins of the programmable chip 1 is limited, the maximum control path quantity of a control circuit is improved, and phase control of a hundred-path-level large array element coherent combination system can be realized.

The invention provides a silicon nitride waveguide and microannulus-based mode-wavelength multiplexer manufacturing method. The method comprises steps: step 1, a lower-limit silicon dioxide layer and a silicon nitride material mode-wavelength multiplexing integrated device layer are sequentially grown on a substrate; step 2, an etching method is adopted to etch the silicon nitride material mode-wavelength multiplexing integrated device layer into a plurality of strip-shaped waveguide structures and a plurality of microannulus resonant cavity structures, and the etching depth reach the surface of the lower-limit silicon dioxide layer; step 3, an upper-limit silicon dioxide layer and a metal heating adjusting layer are sequentially grown on the lower-limit silicon dioxide layer with the plurality of strip-shaped waveguide structures and the plurality of microannulus resonant cavity structures formed in an etching mode; and step 4, an etching method is adopted to etch the metal heating adjusting layer to a plurality of microannulus structures, and manufacturing is completed. According to the method of the invention, coupling is selected through a mode under the wave vector matching condition and characteristics are selected through wavelength of the microannulus, and the on-chip mode-wavelength multiplexing demultiplexing function is realized.

The invention provides a multichannel printing electrode array chip comprising a substrate, an electrode unit array, a plurality of leads, a plurality of reverse side electrode contacts, and a cover plate, wherein the electrode unit array comprises a plurality of three-electrode systems arranged in a matrix manner, and each three-electrode system comprises a circular working electrode arranged on the upper surface of the substrate, and a cambered counter electrode and a cambered reference electrode which are symmetrically arranged on the two sides of the working electrode; the plurality of leads are in one-to-one correspondence with the working electrode, the counter electrode and the cambered reference electrode; the plurality of reverse side electrode contacts are connected with the leads in a one-to-one correspondence manner; and the cover plate is provided with circular holes in one-to-one correspondence with the three-electrode systems, wherein each circular hole is arranged in a manner of being corresponding to the corresponding three-electrode system to form a detecting pool. The multichannel printing electrode array chip disclosed by the invention is used for detecting samples, such as chemistry, biology and medicines, through using an electrochemical method, the device can be used for simultaneously analyzing and detecting multi-ingredient samples or different samples in groups clinically so as to obtain a plurality of data for one time, and the device has the advantages of high sensitivity, good selectivity, good stability, easiness for preparation, low cost and extensive adaption range, and the like.

The invention relates to the technical field of signal processing and discloses a photon-assisted multi-channel compression sampling (CS) system, which is characterized in that the system comprises a first electrooptical modulator, a first demultiplexer, an optical delay line, a multiplexer, a second electrooptical modulator and a second demultiplexer which are sequentially connected with each other. By using photoelectric devices (electrooptical modulators of tens of GHz wideband) of the wideband to realize frequency mixing of the signals of the tens of GHz wideband and by generating different orthogonal code sequences through different optical delays of pseudo-random codes, the system only needs one pseudo-random sequence generator, the cost of the multi-channel CS system is greatly reduced, the number of the channels of the system is improved and the system integration is facilitated at the same time. In combination with the use of multi-wavelength optical carriers, the system only needs two electrooptical modulators and can realize the frequency mixing of different pseudo-random codes and radio-frequency signals.

The invention provides an airborne warning control light box and its light warning method. The method comprises the steps of conducting filtering and anti-shake treatment to positive control or negative control discrete warning signals; determining whether the discrete signals processed by a pre-processing module meet warning requirements; based on an input interface of the discrete signals, determining malfunction information to which the signals belong, outputting the discrete signals to a warning light display unit and an indicating light control unit corresponding to the malfunction information to control the light-on and light-off of a indicating light. According to the airborne warning control light box, the control unit centered around a digital signal processor and PLC devices is used, the conventional warning light box and an warning computer are integrated to miniaturize airborne warning equipment and make the airborne warning equipment more integrated.

The present invention is directed to a voice activity detector that uses the periodicity of amplitude peaks and valleys to identify signals of substantially fixed power or having periodicity.

The embodiment of the invention provides a method and device for recognizing nidi through breast images, and relates to the technical field of machine learning. The method comprises the steps of obtaining the breast images; inputting the breast images to a feature extracting module, and obtaining the feature images of different sizes from the breast images; aiming at any feature image in the feature images of different sizes from the breast images, determining a breast nidus recognition frame from the feature image; according to the breast nidus recognition frame determined from all the feature images, determining the breast nidi of the breast images.

The invention relates to a network monitoring system of a gas station. The main technical characteristics are that the network monitoring system comprises local monitoring and remotely monitoring of the gas station. The local monitoring comprises video monitoring and warning protection. The system can immediately link panorama perimeter monitoring, records and monitors the spot of an accident once an abnormity is found out or an alarm signal hint appears; alarm and distress signals can be immediately sent to a public security bureau and a fire control unit so as to make a fast response; the remotely monitoring mainly comprises an oil corporation monitoring center and a public security bureau alarm command center; all monitoring points are intensively managed in a province oil corporation; important monitoring points of the gas stations in each city are recorded; an important image uploading function is achieved in the public security bureau alarm command center, and various monitoring resources are transparently accessed. The alarm signal of the system can be linked with a fire control part to achieve timely uploading of the alarm signal. The network monitoring system is reasonable in design, and the problems of concentrated management, coordinated monitoring, and the ability of coping with an emergency of the gas station are solved, so that the network monitoring system of each gas station plays a normal role, and the network monitoring system is simple and easy to set the network, convenient to manage and large in storage capacity, and can be widely applied.

The invention discloses a battery charging and discharging test method and a system based on energy storage PCS (Power Conversion System) + BMS (Battery Management System). The method comprises the following steps: constructing a common DC bus required for charging and discharging a battery through an energy storage PCS; when the battery is being charged, extracting energy from the network side bythe energy storage PCS, and when the battery is discharged, feeding the power quantity on the DC bus back to a power grid by the energy storage PCS; hooking the battery to be tested to the DC bus, wherein each group of batteries to be tested is equipped with a set of BCMU (Battery Control Management Unit) for monitoring the state of the battery to be tested and controlling inputting in and removal from the charge and discharge circuit of the battery to be tested; and summarizing the battery charge and discharge information, completing a protection and control strategy for the battery chargingand discharging, and uploading relevant information to a host computer by all battery branches to be tested through the BSMU. The investment of the battery charging and discharging test method and the system based on the energy storage PCS + BMS is low and the expandability thereof is strong, and the invention can be used for battery testing by using PCS and BMS of an engineering project. After the battery testing is completed, the PCS and the BMS can enter the warehouse together with the battery, thereby reducing the investment of fixed assets.