185results about How to "Easy to digitize" patented technology

The invention relates to an electric current reconstructing and over-modulating device of an air conditioning frequency converter, which is characterized by comprising an electric current reconstructing device, a vector controller, a pulse width modulation (PWM) frequency converter, a direct current side electric current sensor, an electric motor and a coder. The electric current reconstructing device comprises an SVPWM over-modulating module, a pulse width modulation (PWM) signal adjusting module, a direct current sampling module and an alternating current reconstructing module. An electric current reconstructing and over modulating method of the air conditioning frequency converter comprises the steps: sampling the direct current side electric current of the pulse width modulation (PWM)frequency converter at twice by the electric current reconstructing device; counting an approach vector switch action time which meets a minimum sampling time request according to the two sampling values; sampling the direct current side electric current at twice again in the approach vector switch action time; and reconstructing three phase alternating current according to the sampling values ofthe direct current at twice, thereby realizing the closed loop control of the pulse width modulation (PWM) frequency converter. The modulating method can be widely used for the field in reconstructingand over-modulating the electric current of the frequency converter in air conditionings and electric vehicles.

The invention relates to a medical appliance, in particular a digital medical diagnosis integrated system formed by combining traditional diagnostic technology of traditional Chinese medicine and module information technology, which comprises a body health information digital test unit, a cardiovascular and cerebrovascular test unit (including electrocardiogram and electroencephalogram main machines, a blood pressure test main machine, a blood pressure test main machine, a blood sugar test main machine and a blood oxygen saturated concentration test main machine), an ultrasonic test unit, a roentgen-ray test unit, an ear-nose-throat image test unit, a system main machine and the like. The system is a set of medical diagnosis equipment which integrates vessel and viscera information tests, pulse tests, electrocardio- and electroencephalo-tests, blood pressure tests, blood sugar tests, blood oxygen concentration tests, B ultrasonic tests, X-ray image tests and ear-nose-throat image tests and can comprehensively analyze and evaluate the human physiological information obtained by the channels and finally make a diagnosis of the health condition of human bodies on the basis of an expert system.

The invention provides a virtual identification display system and method for nuclear power equipment. The system comprises a three-dimensional model design module used for establishing a three-dimensional model database of the nuclear power equipment, a scanning module used for scanning a field two-dimensional drawing to form a target picture, an identification matching module connected with thethree-dimensional model design module and the scanning module and used for identifying the target picture and obtaining a nuclear power equipment three-dimensional model matched with the target picture from the three-dimensional model database, and a display module connected with the identification matching module and used for displaying the nuclear power equipment three-dimensional model and thetarget picture in a superposition manner. In combination with an augmented reality technology and a nuclear power virtual simulation technology, the two-dimensional drawing of the nuclear power equipment is bound with the three-dimensional model of the nuclear power equipment, so that dynamic identification of the equipment drawing and stereoscopic display of the three-dimensional model are realized; and interactive operation between a user and the three-dimensional model of the nuclear power equipment is provided, so that the user can know structure and composition principles of the nuclear power equipment more conveniently and intuitively, and the working efficiency and accuracy are improved.

The present invention relates to a resonant tunneling piezoresistance microaccelerometer. Said invention utilizes the characteristics of that superlattice quantum well film has the piezoresistance effect, and on the super lattice film the resonant tunneling voltage-sensitive resistors are made, the substrate of said superlattice film can be made into peripheral base, cross-shaped cantilever connected with base and force-transferring mechanism of mass block whose periphery is connected with cantilever, and four resonant tunneling voltage-sensitive resistors are positioned in the connected place of cantilever and base. The resonant tunneling piezoresistance microaccelerometer is quantum device made up by adopting MEMS process.

The invention belongs to the field of medical biological technique and discloses a method for digitally detecting micro-mutation by using a micro-emulsion clone amplified bound water gel microsphere chip. The method detects the micro-mutation by combining the microsphere mediated micro-emulsion clone amplifying technique with the water gel chip fixing microsphere fluorescence detection and digitization analysis techniques. The method promotes the positive relevance ratio of micro-mutation, has low cost, high sensitivity and fine specificity and is applied to quantitatively measuring micro-mutation of various low abundance tumor relative genes.

The invention provides a test platform for large energy storage converters, comprising an energy storage converter connected with an upper computer monitoring system. The input end and the output end of the energy storage converter are respectively connected with a power grid through a battery simulation system and an anti-islanding detection device. An energy storage converter detection device is connected across the two ends of the energy storage converter. The battery simulation system includes an energy management device. Compared with the prior art, the test platform for large energy storage converters, provided by the invention, is strong in applicability and stable in performance and can effectively improve the test accuracy of electric performance and grid connection performance of large energy storage converters.

The invention discloses a method for outputting the standard frequency of a coherent population beat-frequency atomic clock. The method drives a semiconductor laser through a driving current signal, and the driving current signal is modulated by a microwave signal which is produced by a crystal oscillator and locked in the crystal oscillator, so as to produce two pumping lasers of which the frequency difference equals to the frequency of the microwave signal, and act with the atoms with Lambada three-level system so as to produce a relaxation oscillating signal of which the center frequency equals to the beat frequency of the microwave signal and the hyperfine energy level; then the relaxation oscillating signal is photo-electrically converted and FFT-transformed with DSP chips so as to get an oscillating center frequency; finally, the oscillating center frequency is taken as the control signal of an FPGA to change the frequency-controlled word of the DDS chips and get the standard frequency output. The method simplifies the circuit design of an atomic clock system, improves the stability and reliability of the atomic clock, and benefits the digitalization and miniaturization of the atomic clock.

The invention discloses a current internal-model decoupling controller of an open-winding permanent-magnet synchronous motor. A common three-phase permanent-magnet synchronous motor stator winding is subjected to circuit opening, so that six end leads are led out and respectively correspondingly connected with a first inverter and a second inverter; only one direct-current power supply supplies power for the current internal-model decoupling controller of an open-winding permanent-magnet synchronous motor, so that after a, b and c-phase sampling currents ia, ib and ic of a motor stator winding pass through the current internal-model decoupling controller, a d-axis modulation voltage u*d and a q-axis modulation voltage u*q are obtained, and then the motor is controlled by using a voltage space vector pulse-width modulation strategy. The open-winding permanent-magnet synchronous motor enables the harmonic content of an output voltage to be reduced under a lower switching frequency, and under the condition that the space is small and the battery capacity is limited and under the limitation of the voltage / current capacity of a power switch device, the total power and loading capacity of a system can be enhanced. On the basis of keeping the structure advantages of the novel motor, the influence on the system caused by mismatch errors arising from system parameters is reduced, the robustness of the system is improved, and the controller is easy to adjust.

The invention discloses an AOI character defect detection method based on industrial machine vision. The AOI character defect detection method comprises the steps that a to-be-detected image is acquired; the to-be-detected image is preprocessed to obtain a character-containing region-of-interest image of which the position is corrected; the region-of-interest image of the to-be-detected image is separated to obtain a character region image; template matching is carried out on the character region image of the to-be-detected image and a pre-created reference image template to obtain a templatematching result; whether the to-be-detected image has character defects or not is judged according to the template matching result; and a character defect judgment result is outputted. According to the method, the defects of the ROI can be detected under the condition of a low-pixel grey-scale map through template matching, the detection efficiency and the accuracy are improved, and the detectionlabor cost is reduced.

The invention discloses a parallel analog-to-digital conversion device and a method for controlling deflection of analog-to-digital conversion channels. The conversion device comprises a clock device and a comprehensive detection processor, wherein the clock device outputs clock signals processed by phase adjustment to a sampling holder, so that the clock signals are sampled by a sampling holder and are subject to analog-to-digital conversion by an analog-to-digital converter; and the comprehensive detection processor detects to acquire the deflection amount of each analog-to-digital conversion channel according to the digital signals converted by the analog-to-digital converter, feeds the clock signals, which are obtained by carrying out corresponding phase adjustment on the clock signals output by the clock devices according to the deflection amounts, to the clock device. The invention has obvious cost advantage; the control method is flexible and simple, and can not be easily influenced by the external environment; and the sampling clocks can be locked on any required phases.

The invention discloses a model predictive single-phase-shift control method for a double-active full-bridge DC-DC converter, including the following steps: constructing a state differential equationof the output voltage of the double-active full-bridge DC-DC converter according to a state space average model of the output voltage of the converter; discretizing the differential item of the outputvoltage in the differential equation, and calculating the predicted output voltage of the converter in the next control period; constructing a target evaluation function J according to the differencebetween the predicted output voltage of the converter and a reference output voltage; and taking the derivative of the target evaluation function J to obtain the optimized phase shift D(opt) of the double-active full-bridge DC-DC converter under predictive control. The problem that a converter is slow in dynamic response in case of sudden change of the load resistance, the input voltage and the reference voltage under the existing control algorithm is solved. The control algorithm has the advantages of simple structure, easy digitization and good fault tolerance, and thus, has strong practicability.

A method is disclosed for evaluating logs to predict structural properties and / or warp tendency of lumber or veneer that might be produced from a given log. The method can be used in a forest stand, sorting yard or merchandiser, on-line in a sawmill, or at other locations along the route from forest to mill. It enables decisions whether a log should be directed to a sawmill for lumber manufacture or for other applications such as timbers, veneer, or pulp chips. Log taper has been found to correlate with both stiffness and warp propensity of lumber cut from a given log. A high amount of taper leads to warped lumber and low stiffness lumber or veneer. The correlation with taper is highest if it is measured over the full stem length of the harvested log, before it is bucked to sawmill size or veneer blocks. Other geometric features of the log, such as sweep or cross section irregularity, can be combined with taper in a multivariate regression equation to increase accuracy of prediction. This can readily be accomplished in a conventional scanner used in a sort yard or sawmill.

The invention discloses a resonant bionic hair flow velocity and accelerator microsensor based on a two-stage lever amplifying principle. The microsensor comprises an upper-layer hair structure, a middle-layer silicon microsensor structure and a lower-layer glass substrate. Upper-layer hair is directly processed by adopting a micro-processing technique or bonded on the middle-layer silicon microsensor structure by adopting a micro-assembly process, the middle-layer silicon microsensor structure is bonded on the lower-layer glass substrate through an anchor point, and the lower-layer glass substrate is provided a bonding point, an electrode and a signal lead. The middle-layer silicon microsensor structure comprises a two-stage lever force amplifying mechanism; when outside flow velocity oracceleration in the X-axis direction is input, inertia force generated by dragging force or acceleration generated when the outside flow velocity acts on hair is amplified and respectively counteractson two double-end-fixed tuning fork resonator so as to realize signal differential detection; output signals are frequency digital signals, so that digitalization of a circuit is improved. The microsensor is symmetric in structure, high in measuring accuracy and interference resistance and reliable in performance.

The invention discloses a non-angle operation SVPWM method and a grid-connected inverter system. The non operation SVPWM method includes the following steps that a three-level inverter is regarded as a two-level inverter, only the large vector and the zero vector are considered, a large fan zone where a reference vector exists is judged and action time of all resultant vectors is calculated; through simple comparison and calculation, a small fan zone in a three-level space vector diagram where the reference vector exists and action time of all the resultant vectors can be obtained. The three-level voltage source type grid-connected inverter system comprises a direct-current bus voltage control module, a reference current generating module and a non-angle operation SVPWM module. According to the non-angle operation SVPWM method and the grid-connected inverter system, power of the system can be controlled respectively and meanwhile, complete non-angle operation of the inverter system can be achieved. The two-level space vector is applied in modulation and converted into a three-level space vector in a linear mode and calculation of a trigonometric function is completely avoided, the calculation amount of the controller is greatly reduced, digitalization is facilitated and the non-angle operation SVPWM method and the grid-connected inverter system have obvious advantages in industrial application.

The invention discloses a closed-loop management system for potential safety hazards in production. The system comprises a potential hazard collection module, a potential hazard uploading module, a potential hazard data processing module, a potential hazard rectification module and a potential hazard recheck module, wherein the potential hazard collection module is used for collecting potential hazard information in safety production; the potential hazard uploading module is used for uploading the potential hazard information in safety production; the potential hazard processing module is usedfor classifying and grading potential hazards through a database and giving treatment schemes; the potential hazard rectification module is used for issuing safety production potential hazard rectification schemes, potential hazard rectification deadlines and potential hazard principals; and the potential hazard recheck module is used for verifying and recording potential safety hazard rectification conditions on the basis of potential safety hazard closed-loop management. The system has the advantage that better technical support is provided for checking and solving potential hazards in coalmine safety production informatization on the basis of combined application of the internet of things and a big data technology, so that the coal mine safety production informatization level is further improved, and the level of collecting, checking and managing potential safety hazards in coal mine production is remarkably improved.

The invention discloses a shaped-chamber flowmeter including the seal cavity with the shaped-cylinder lumen, the inlet, the outlet and training slot. The rotor units composed by the decussation training slot, the first combination sliding plate, the second combination sliding plate and the permanent magnet is installed in the seal cavity. The shaped-chamber is composed of the semicircular contour, the 1 / 4 circular contour and 1 / 4 ellipse contour, which are all in same axis. The radius of semicircular contour and the 1 / 4 circular contour is equal to the semi-major axis and the semi-minor axis of 1 / 4 ellipse contour respectively. Two groups of sliding plates are installed in the decussation training slot. The rotor is in the same axis with each contour of lumen, the radius is equal to the radius of 1 / 4 circular contour, which are slip fit and rotate combined with the combination sliding plate and cavity wall under the flux pressure error. The two sliding plates slide in cross under the work of the 1 / 4 ellipse contour. The rotor rotates by one circle which mean that there has the equal fluid flow through the cavity, so it can reach the fluid meter.

Having a memory card input and output unit, data conversion management means for judging the type of image data receivable at the destination side, first converting means for converting from the YCbCr format used in the memory card into the RGB format, second converting means for converting from the RGB format into the L*a*b* format used in the color facsimile apparatus and monochromatic format converting means, if the data to be transmitted is the color image data of the memory card, the data is once converted into RGB format in the first converting means, and then converted into L*a*b* format in the second converting means, and in the case of the image data being read by the scanner, the data is directly converted into L*a*b* format in the second converting means.If the type of image data receivable at the destination side judged by the data conversion management means is color image, the data of L*a*b* format obtained in the second converting means is transmitted directly. If the type of image data receivable at the destination side is monochromatic image only, the data of L*a*b* format obtained in the second converting means is transmitted by converting into monochromatic format, and therefore if the destination side is a monochromatic facsimile apparatus, the color image can be automatically transmitted as monochromatic image.

A computer-implemented method of managing information is disclosed. The method can include receiving a message from a mobile device configured to connect to a mobile device network (the message including a digital image taken by the mobile device and including information corresponding to words), determining the words from the digital image information using optical character recognition, indexing the digital image based on the words, and storing the digital image for later retrieval of the digital image based on one or more received search terms.

The invention provides an OFDM receiver baseband processing method based on a low-precision ADC and an OFDM receiver baseband processing system based on the low-precision ADC, wherein a received signal is converted into an analog baseband signal through down conversion and then divided into two paths, one path is subjected to quantification with high sampling rate and low precision (1-2 bits), frame synchronous search is realized through an autocorrelation method by designing a proper reference sequence according to an obtained low-precision sample value sequence, and a high-efficiency iterative algorithm is designed for realizing accurate estimation for composite channel gain corresponding to each subcarrier, thus, constellational symbol data transmitted on each subcarrier can be recovered; and the other path is subjected to quantification with low sampling rate and high precision, and noise power estimation and automatic gain control are realized through long-time time averaging. A receiving method and a receiver processing system provided by the invention can guarantee realization of high-reliability OFDM data transmission under the condition of using the ADC with ultralow precision of 1-2 bits.

The invention relates to a trapezoidal wave excited sensitivity-variable time difference type magnetic flux gate sensor and a data processing method. An FPGA (Field Programmable Gate Array), a D / A (Digital-to-Analog) conversion circuit, a V / I (Voltage-to-Current) conversion circuit, an excitation coil, a magnetic core, a frame, an induction coil, a matching resistor, an instrument amplifying circuit, a band-pass filter circuit, a hysteresis shaping circuit, a not-gate circuit and the FPGA are connected in turn to form the trapezoidal wave excited sensitivity-variable time difference type magnetic flux gate sensor. According to the trapezoidal wave excited sensitivity-variable time difference type magnetic flux gate sensor and the data processing method, a time difference type magnetic flux gate with the time difference of a positive pulse and a negative pulse which are output through the sensor as a detection method is stable in output response, high in sensitivity and low in power consumption; a circuit structure is simple, the performance of the response stability of the output time difference of the existing time difference type magnetic flux gate sensor is improved, the detection output accuracy is increased, and the measurement requirements of the actual target magnetic field are met; the data processing is performed through the FPGA and accordingly the speed is high, the resolution is high, and the signal frequency is controllable; time difference data are processed and accordingly the impact on signals of noise is reduced, the accuracy is improved, and the trapezoidal wave excited sensitivity-variable time difference type magnetic flux gate sensor and the data processing method are suitable for real-time dynamic magnetic field measurement of the magnetic flux gate; the process is simple and the digitization of the time difference type magnetic flux gate sensor can be achieved.

The invention discloses a gyroscope balance device for an ultrasonic anemorumbometer and an angle self-adaptive balance adjustment method of the gyroscope balance device, wherein the ultrasonic anemorumbometer comprises a power supply module, a main control module, an ultrasonic wind measurement module, a data communication module, a data storage module, a temperature compensation module and a gyroscope balance device. The gyroscope balance device comprises a gyroscope sensor and a universal joint, wherein the gyroscope sensor is used for monitoring the working angle of the ultrasonic anemorumbometer in real time, wherein attitude calculation is carried out on the working angle of the anemorumbometer through a PID algorithm, and the universal joint is rotated to perform angle adjustment according to the change of the working angle of the anemorumbometer, and finally the ultrasonic anemorumbometer can achieve self-balancing in a short time.

A system for aggregating a plurality of credit providers to provide credit to at least one consumer comprising a consumer device comprising an identifier associated with the at least one consumer; a central facilitator arranged to receive a request for credit from the consumer device; the request comprises the identifier associated with the at least one consumer; a whitelist database arranged in data communication with the central facilitator, the whitelist database further arranged to receive whitelist information from at least one of the plurality of credit providers; wherein upon receipt of a request for credit, the central facilitator instructs the whitelist database to compare the identifier with the whitelist information to determine if the at least one consumer is whitelisted, such that: if the at least one consumer is whitelisted, the at least one consumer is provided with a first electronic interface to complete an application for credit; if the at least one consumer is not whitelisted, the at least one consumer is provided with a second electronic interface for a plurality of identity checks.

The invention discloses an active contour model image segmentation method based on non-subsampled contourlet transformation. The active contour model image segmentation method comprises the steps that firstly, an image to be segmented is expressed with multiresolution through the non-subsampled contourlet transformation, secondly, a probability model with a multiresolution coefficient is established, and finally, integration operations of the multiresolution coefficient are carried out by utilizing the active contour model based on regions, so that the aim of image segmentation is achieved. The experimental results show that the active contour model image segmentation method can nicely carry out image segmentation operations, integration of the segmented image is ensured, and detail information of the image can be segmented.

A task distribution method based on the idle time of the loss assessment officers comprises the following steps of using CU clients to calculate the idle time of the corresponding loss assessment officers; using a server to set and send an idle time threshold value; if the idle time reaches the threshold value, using the CU clients to send the task requests to the server; using the server to receive the task requests and recording the time; using the server to generate a task request table; using the server to generate a task distribution table; using the server to orderly distribute the tasks in the task distribution table to the loss assessment officers in the task request table; using the server to update the task request table and the task distribution table; enabling the CU clients obtaining the tasks to carry out the zero clearing operations and stop calculating the idle time of the corresponding loss assessment officers, after the tasks are ended, using the CU clients to calculate the idle time again. According to the present invention, based on the idle time of the loss assessment officers, by setting the threshold value and establishing the task request table, the more efficient and reasonable task automatic distribution is realized, the working enthusiasm of the loss assessment officers is increased, at the same time, the loss assessment efficiency and fairness are improved greatly.

This invention relates to a method and system for digitizing bit synchronization in wireless communication. The method comprises delaying at intervals an input signal sequence, which contains at least one path of input signals; multiplying each path of input signals respectively by input signals in at least one local channel within one symbol period, the results are accumulated and then averaged within the symbol period; comparing absolute values of the averaged values of each channel of each path of input signals, and choosing a maximum absolute value to output as a bit synchronization extremum of the path; comparing the bit synchronization extremums of each path of input signals, and choosing a path of input signals having a maximum extremum as a decoded data output. This invention utilizes DMR bit synchronization technology that facilitates digitalization and reduces calculation, thereby greatly increase data rate, save resources and reduce costs.

The invention discloses a space vector control method of a fault tolerance system of a PMSM. A deviation of the rotating speed is obtained according to a given reference rotating speed of the motor, areference quadrature-axis (q-axis) current signal is generated by a rotating speed regulator, a given reference q-axis current signal, the reference q-axis current signal, a direct-axis (d-axis) current and a q-axis current are used to determine a current deviation, a reference DC voltage and a DC q-axis voltage are obtained from the current deviation via a current regulator, a reference voltagein a two-phase static coordinate system is obtained by coordinate transformation, a fault reason is determined via a fault signal and a reference voltage, an SVM fault tolerance control module is usedto calculate space voltage vectors of a control inverter in different faults, a modulation signal obtained by calculation is sent to a PWM chopper module to obtain ON / OFF triggering signals of bridgearms of the fault tolerance inverter of the two-phase PMSM, and tolerance control of the two-phase PMSM is realized. The method is highly practical and universal, and is suitable for different typesof two-phase motors.

The invention provides an accurate-positioning image-distortion-free X-ray digital imaging device and an imaging method. An X-direction displacement sensor and a stepper motor are arranged on a movable plate; a Y-direction displacement sensor and another stepper motor are arranged on a fixed plate; a detector is arranged on the movable plate; a long rod is arranged on a detector base; a cross rod is arranged on the long rod; an X-ray source is fixed on the cross rod; a digital optical camera is arranged on the X-ray source; and a Z-direction stepper motor and a displacement sensor are arranged on the long rod. The imaging method comprises that: the distance of the detector is regulated through the stepper motor on the long rod; the stepper motors on the movable plate and the fixed plate are regulated to allow the detector to scan from a starting point in the position of a perspective area to an ending point; the detector transmits measured electronic signals to a host computer; and the host computer transforms the electronic signals into gray values of regional color blocks in digital images. The invention has the advantages of fast imaging, capability of carrying out various types of digital processing on images and realizing remote diagnosis, perspective scan in local regions and reduction in damage of rays to human body.

The invention relates to an automatic generation method of a dyeing recipe. Nowadays, the dyeing recipes of printing and dyeing enterprises are mainly determined according to experience and are inaccurate. The method takes three primary colors of a color reduction system, which are widely adopted in the printing and dyeing industry as a basis to establish a dyeing recipe model, and estimates the model parameters based on the maximum likelihood method. With a view of self errors of a model, the method optimizes the predefined quadratic performance index by controlling the amount of three basic dyes based on the linear quadratic optimal control method; and the method comprises the concrete steps as follows: establishing a dyeing recipe model, generating an accurate dyeing recipe and automatically generating the dyeing recipe. The method can better compensate for the self errors of the model and guarantees the generation of a more accurate dyeing recipe.

The invention discloses a high-power image dot coverage rate digital measuring method suitable for a whole printing process. The measuring method includes the processes that in the whole printing processes of platemaking, reprinting, filming and the like, a printing image to be measured is selected, screenshot is conducted to obtain color samples by using a high magnified glass, pixel values of the color samples are measured by an image tool software, percentage judgment is conducted by using a general formula, the dot coverage rate is obtained through comparison and correction, the dot coverage rate is measured and corrected reasonably according to a new theory accurately and rapidly, and abnormal reprinting sample making is completed in advance at a time. Dot area rate is measured accurately and rapidly and corrected to replace the coverage rate, errors are corrected automatically, and the accuracy is high. Datamation and automation joint are convenient to conduct. In the printing of a frequency adjustment web and printing dots, edges, shapes and dot spacing are easy to determined, the website of the film or PS edition is clear, the shape is good, and the distinguish accuracy and identification error can be controlled within 1%.