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39results about How to "Meet the input requirements" patented technology
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Input buffer circuit for high-speed pipeline analog-to-digital converter
InactiveCN101800550AMeet the input requirementsReduce load capacitanceAnalogue-digital convertersCapacitanceNegative feedback
The invention provides a input buffer circuit for high-speed pipeline analog-to-digital converter (ADC). The input buffer circuit comprises an input pair transistor, a current mirror load, a gain-boosted amplifier and a compensation capacitor, wherein the input pair transistor consists of a first MOS (metal oxide semi-conductor) transistor and a second MOS transistor of a source negative-feedback resistor; the current mirror load consists of a third MOS transistor and a fourth transistor which are connected to each other by a gate; the positive input terminal of the gain-boosted amplifier is connected with the drain of the first MOS transistor, the negative input terminal thereof is connected with the drain of the second MOS transistor, and the output terminal thereof is connected with the gate of the third MOS resistor; and one terminal of the compensation capacitor is connected with the gate of the third MOS transistor, and the other terminal thereof is connected with the drain of the third MOS transistor. The input buffer circuit of the invention is capable of meeting the requirements for the input of high-speed signals, effectively reducing the inputted load capacitance and increasing the outputted impedance.
Owner:ZHEJIANG UNIV
Method and device for acquiring continuous physical quantity data
ActiveCN102393214AMeet the input requirementsSuppress random disturbanceDigital technique networkMeasurement arrangements for variableComputer sciencePhysical quantity
The invention provides a method for acquiring continuous physical quantity data such as temperature, pressure and the like. The method comprises the following steps: inputting a voltage signal (u) representing continuous physical quantity; obtaining a sampled signal (uk) of an analog voltage through an analog sampling channel, wherein the sampling frequency is f delta h; performing digital lowpass filtering on the (uk) to obtain a voltage signal subjected to lowpass filtering, and resampling to obtain a resample signal, wherein the resampling frequency f delta y is the same as the sampling frequency required by an application terminal and the sampling frequency f delta h is M times of the resampling frequency f delta y; and storing and outputting the resample signal to the application terminal. The invention also provides a corresponding device. According to the invention, the cost of the analog sampling channel is lowered; the device and method provided by the invention can be directly applied to industrial automation for substitution, especially output signals do not contain transient values, the requirements of a stable model on input quantity can be met, the random disturbance can be inhibited, and the measurement accuracy can be improved.
Owner:郝玉山
Powdery active carbon regeneration system and powdery active carbon preparation method
ActiveCN107827109AReduce lossesHigh mechanical strengthCarbon compoundsActivated carbonProcess engineering
The invention discloses a powdery active carbon regeneration system and a powdery active carbon preparation method, and belongs to the field of waste treatment. The powdery active carbon regenerationsystem comprises a roller granulating device, a regeneration heating furnace and a gas burning device which are sequentially connected. The system and the method have the advantages of realization ofthe regeneration treatment and cycle use of powdery active carbon, reduction of the pollution to the environment, reduction of the use cost of active carbon, simple process flow, and no secondary pollution in the production process.
Owner:BEIJING GUODIAN FUTONG SCI & TECH DEV
Crop plantation space layout optimization method based on improved Cuckoo algorithm
InactiveCN108805349AMeet the input requirementsImprove global search performanceForecastingArtificial lifeLayout planningOptimization problem
The invention relates to a crop plantation space layout optimization method based on an intelligent optimization algorithm, in particular to a crop plantation space layout optimization method based onan improved Cuckoo algorithm, and belongs to the field of geographic space layout planning. The method aims at a crop plantation layout optimization problem to redefine an individual coding way, an initial layout scheme generation method and a multi-objective function and constraint condition processing method in the Cuckoo algorithm on the basis of a Cuckoo algorithm framework, a one-to-one mapping relationship of the problem and the Cuckoo algorithm is established, and a cross replacement strategy and a local update strategy, which aim at the space layout, are put forward so as to establishthe information exchange and update mechanism of a Cuckoo individual again to meet crop space layout optimization requirements. Meanwhile, the method is combined with a Pareto multi-objective processing technology, and various candidate schemes can be generated to provide decision support for decision makers. By use of the cross replacement and local update strategy put forward by the invention,the convergence efficiency and the solving accuracy of the algorithm are improved.
Owner:INST OF REMOTE SENSING & DIGITAL EARTH CHINESE ACADEMY OF SCI
Airborne test system and method for oxygen concentration of airplane fuel tank on the basis of electrochemistry principles
PendingCN107748194AMeet the input requirementsHigh degree of automationMaterial analysis by electric/magnetic meansAircraft components testingJet aeroplaneReal time analysis
The invention relates to airborne test system and method for oxygen concentration of an airplane fuel tank on the basis of electrochemistry principles. The system is composed of eight channels, whichare divided into two groups by four in each group. Each group is composed of a cabinet A and a cabinet B and is equipped with four channels. Each group is also equipped with four oxygen content monitoring devices and is also correspondingly matched with a sample collection subsystem, a data collection and processing subsystem, an assistant subsystem and a power subsystem. The test method of the test system mainly includes four steps: work preparation, calibration of the test system, sample gas detection, and system reset. In the invention, after the work preparation and calibration are completed on ground, to-be-tested gas is automatically sampled and processed until input requirement of the oxygen content monitoring devices is reached; and then oxygen concentration in a non-oil space in the airplane fuel tank or pipelines of an inerting system during the whole flight can be analyzed, collected and recorded in real time; on the basis of the data, the intering effect of the inerting system of the airplane fuel tank can be evaluated. The system has high automation degree and high detection precision, and is convenient to use.
Owner:CHINESE FLIGHT TEST ESTAB
Method for improving doppler sound quality for colorful ultrasonic system
ActiveCN101427930AImprove sound qualityQuality improvementBlood flow measurement devicesTransducer circuitsSonificationSound quality
The invention relates to a method used for improving Doppler sound quality in a color ultrasound system, which bases on the steps as follows: a digital signal processor is utilized to complete the former treatment to ultrasonic echo signals; the DSP sends sound signals to a programmable device gradually with batches; a programmable chip completes the serial-parallel transformation on data, and restores sound data of a positive blood stream and a reverse blood stream; every adjacent data is supplemented with seven zero; a 63-step FIR is utilized to complete up-sample filtering, and eight special multipliers of the programmable chip are used; an interpolated point is obtained through adding up the arithmetic products between eight original point data and interpolated coefficients, the coefficients are switched by turns, all the coefficients are just used after switching for eight times, and eight up-sample filtering data is obtained finally; and the up-sample filtering data is stored into an FIFO, and then is output to a DAC chip in a uniform speed manner. The method utilizes the programmable chip to perform up-sample processing on part of the sound signals, increases the sampling efficiency under lower PRF without increasing the cashe, and reduces the distortion of DAC inband high frequency signals so as to improve the Doppler sound quality.
Owner:SHENZHEN MINDRAY BIO MEDICAL ELECTRONICS CO LTD
Super-high voltage input switch power source module
InactiveCN103812346AMeet the input requirementsDc-dc conversionElectric variable regulationUltra high voltageHigh-voltage direct current
The invention relates to a super-high voltage input switch power source module. The super-high voltage input switch power source module comprises an input rectifier filter module used for converting an input alternating current into a high voltage direct current, a control chip connected with an output end of the input rectifier filter module, a switch tube which is connected with an output end of the control chip and comprises a resistor R1, a resistor R2, a voltage stabilizer tube TVS1, a field effect transistor Q1, a field effect transistor Q2 and a voltage stabilizer diode VS1, a high frequency isolation transformer connected with output ends of the input rectifier filter module and of the switch tube, an output rectifier filter module connected with an output end of the high frequency isolation transformer, and a feedback module connected with an output end of the output rectifier filter module and an adjusting end of the control chip. According to the super-high voltage input switch power source module, the switch is designed to make the switch power source module satisfy super-high voltage input requirements.
Owner:SUZHOU IND PRAK NEW HONGBO COMM TECH
Receiving chip circuit and communication system
ActiveCN101499809ALow costIncrease rate of ascentTransmissionComputer architectureCommunications system
The embodiment of the invention discloses a receiving chip circuit and a communication system; wherein, the receiving chip circuit comprises M receiving chips; in the M receiving chips, the input ends of N receiving chips are respectively provided with a regulating circuit which is used for gaining energy of clock signals input into the input end of the N receiving chips in a selected frequency band to a preset value; wherein, N is an integer which is more than zero and M is larger than N. The communication system comprises a PCB, which is provided with a clock chip and the receiving chip circuit; and the clock chip provides clock signals for the M receiving chips in the receiving chip circuit by transmission lines. The embodiment of the invention can effectively improve rising rate of the clock signals, reduce the rising time of the clock signals, meet the input requirements of working chips and guarantee the stable working of the working chips.
Owner:BEIJING XINWANG RUIJIE NETWORK TECH CO LTD
Distributed data acquisition device based on microprocessor
InactiveCN105739384APromote expansionAvoid wastingProgramme controlComputer controlData synchronizationPower consumption
The present invention discloses a distributed data acquisition device based on a microprocessor. The distributed data acquisition device based on the microprocessor comprises a plurality of distributed prepositive workstations, an RS232 bus, and a simulation multi-path switch control unit connected with a PC. Each distributed prepositive workstation is composed of a signal conditioning circuit, the microprocessor with a multi-channel A / D converter and an RS232 communication interface, and the simulation multi-path switch control unit comprises a communication interface expansion circuit, the microprocessor and the RS232 communication interface. The data acquisition device can obtain the multi-channel data synchronously and real-timely, adopts a distributed structure, forms a data detection network by the cooperation of the plurality of workstations, is flexible in system layout, simple and convenient in channel expansion, low in cost and good in low power consumption performance, at the same time, avoids the resource waste effectively, and also has the very high reliability and the good data real-time performance on the condition of many channels, and can satisfy the actual application requirement.
Owner:WUHAN UNIV
BiGRU network drilling working condition identification method combined with attention mechanism
ActiveCN114596010AReduce the black box effectExpanding the problem of small sample sizeCharacter and pattern recognitionNeural architecturesEngineeringSequence Feature
The invention discloses a BiGRU network drilling working condition identification method in combination with an attention mechanism, and the method employs a large amount of actual data generated during drilling as a basis, carries out a series of data enhancement methods, and solves a problem that the number of samples is small to the greatest extent. In order to weaken a black box effect during machine learning, a decision tree recognition model guided by a semi-empirical formula combined with actual data is designed to assist manual data annotation. For sequential well drilling information, a two-way gate control unit network capable of extracting sequence features is used for assisting an attention mechanism to train a model, and strict parameter adjustment is carried out. Finally, data of a single well which does not participate in training is used, and generalization ability testing of the model is carried out on the premise that transfer learning and pre-training are not carried out; comparison experiments prove that the method ensures feasibility and universality under the condition of high accuracy in drilling working condition time sequence prediction, and has practical application value.
Owner:SOUTHWEST PETROLEUM UNIV
Device with man-machine interaction functions of game and massage
The invention discloses a device with the man-machine interaction functions of game and massage, and the device comprises an intelligent grip ball which is used for collecting, recording and analyzing gripping force data and the data of position changes of a ball, operating a game of an intelligent terminal, controlling the massage force and frequency of a matched massage paster according to the size and frequency of gripping forces, and achieving the man-machine interaction; and the massage paster which is used for cooperating with the intelligent grip ball to massage a human body, receiving a control signal transmitted by the intelligent grip ball, and achieving the social interaction. The intelligent grip ball and the massage paster are respectively provided with an internal hardware circuit. A sensor employed by the device is low in cost, but can meet the input requirements of most of game instructions, can support most of cellphone games and small-scale gams in computers and televisions. Because the size of the device is small and the device is portable, the device can enable most of persons to combine body building and game playing when the persons are off working or learning.
Owner:SUN YAT SEN UNIV
Reusable virtual keyboard implementation method based on JavaScript and an application thereof
PendingCN112988154AReduce development costsImprove compatibilityInput/output for user-computer interactionSoftware engineeringSoftware engineeringComputer compatibility
The invention discloses a reusable virtual keyboard implementation method based on JavaScript and an application thereof. The method comprises the following steps: S1, compiling a virtual keyboard JS file and a virtual keyboard CSS file; s2, introducing the JS file and the jQuery library of the virtual keyboard into a project of a to-be-realized virtual keyboard function through a Script tag, and introducing the CSS file of the virtual keyboard through a link tag; and S3, binding a method for calling the virtual keyboard for the input box element in the item of the to-be-realized virtual keyboard function. According to the method, the virtual keyboard can be awakened by clicking the input box by utilizing the traditional front-end technology, and the method has the advantages of low development cost, good compatibility, easiness in transplantation, more functions and individuation.
Owner:WUHAN HONGXIN TECH SERVICE CO LTD
Steam coal separation process
ActiveCN107008566AWiden the proportion of selectedIncrease the proportion of selectedSievingScreeningWater treatment systemProcess engineering
The invention discloses a steam coal separation process. The steam coal separation process comprises the steps that raw coal is subjected to dry method deep classification through a double-layer elastic classifying screen, first-layer plus sieve materials of the double-layer elastic classifying screen enter a crusher, the first-layer plus sieve materials after crushing and second-layer plus sieve materials of the double-layer elastic classifying screen enter a desliming screen together to be subjected to dry desliming, and minus sieve materials of the double-layer elastic classifying screen and minus sieve materials of the desliming screen serve as slack coal products; plus sieve materials of the desliming screen enter a gravity separator for separation, light products and heavy products after separation are subjected to medium removal and dehydration, then clean coal and gangue products are obtained, minus sieve materials after medium removal and dehydration enter a slime water treatment system to be treated, and washing water closed cycle of the system is realized. The steam coal separation process is simple, production is steady and efficient, the steam coal separation has the advantages that the preparation proportion is high, the feed size range is wide, separation precision and adaptability are high, production cost is low and the like, and good economical and practical benefits are achieved.
Owner:CHINA UNIV OF MINING & TECH
Drying equipment for agricultural products and drying control method
PendingCN113267037ALower compression ratio and energy consumptionImprove drying efficiencySemi-permeable membranesMechanical apparatusProcess engineeringHeating system
The invention relates to drying equipment for agricultural products and a drying control method, and belongs to the technical field of agricultural machines. The drying equipment structurally comprises a dehumidification system, a heating system and a drying system, and all the systems are connected through pipelines to form loops. The dehumidification system comprises a dehumidification film assembly, the heating system comprises a compressor, a condenser for heating a drying medium, an expansion valve, an evaporator for cooling and dehumidification and a humidification device, and the drying system comprises a drying box. A monitoring device electrically connected with a main machine is arranged in the drying box, and each loop is provided with a three-way valve and a temperature and humidity sensor which are electrically connected with the main machine. The drying equipment for agricultural products and the drying control method have the advantages that air is dehumidified through the low-energy-consumption and high-efficiency dehumidification performance of a dehumidification film, a heat pump is used for auxiliary heating, and the purposes of improving the drying efficiency of the drying system and reducing energy consumption are achieved.
Owner:NANJING AGRI MECHANIZATION INST MIN OF AGRI
Temperature-resistance curve acquisition apparatus of distribution transformer winding and method thereof
ActiveCN104914310AImprove accuracyTemperature synchronizationResistance/reactance/impedenceMicrocontrollerElectrical resistance and conductance
A temperature-resistance curve acquisition apparatus of a distribution transformer winding and a method thereof are disclosed. The temperature-resistance curve acquisition apparatus of the distribution transformer winding comprises a voltage sampling module, a wireless temperature sensor and a single chip microcomputer, wherein the voltage sampling module is used to sample a voltage difference of two ends of the heated distribution transformer winding so as to acquire voltage sampling data; the wireless temperature sensor is used to sample a temperature of the heated distribution transformer winding so as to acquire temperature sampling data; the single chip microcomputer is used to convert the voltage sampling data into resistance sampling data; according to the resistance sampling data and the temperature sampling data, a curve of changes of direct current resistances of the distribution transformer winding along with the temperatures is generated. By using the temperature-resistance curve acquisition apparatus of the distribution transformer winding and the method provided in the invention, the single chip microcomputer is used to carry out synchronization on data of an analog-digital converter and data sampled by the wireless temperature sensor so that accuracy of a temperature-resistance curve of the distribution transformer winding is increased.
Owner:STATE GRID SICHUAN ELECTRIC POWER CORP ELECTRIC POWER RES INST +2
Reordering and segmenting method based on pixel points of large-size image
ActiveCN113298702ASmall sizeEasy post-processingImage enhancementImage analysisPattern recognitionComputer graphics (images)
The invention discloses a reordering and segmenting method based on pixel points of a large-size image, which comprises the following steps of: determining that the pixel points in an image P comprise N rows and M columns, and numbering coordinates of all the pixel points of the image P to obtain a coordinate set S of all the pixel points of the image; calculating a center pixel point coordinate of the image P; determining an influence field of a central pixel point of the image P, and calculating to obtain a vector P2 after all pixel points in the image P are reordered; and S4, setting the size of the image after the image P is segmented, dividing the vector P2 into c vectors with the same size, and storing the c vectors as segmented image data of the image P. And segmentation from the center to the edge is realized, the picture is stored in a datamation manner, and random division can be realized according to the required size.
Owner:CHONGQING UNIVERSITY OF SCIENCE AND TECHNOLOGY
Differential operational amplification circuit for image processing system, and image processing system
PendingCN110044492AGuaranteed Signal IntegrityGuaranteed anti-interference abilityRadiation pyrometryDifferential amplifiersImaging processingDifferential signaling
The invention discloses a differential operational amplification circuit for an image processing system, and the image processing system, wherein the differential operational amplification circuit comprises a first input resistor and a second input resistor, a differential operational amplifier, a first feedback resistor and a second feedback resistor, wherein a first end of the differential operational amplifier is connected with an output end of a thermal imaging sensor through the first input resistor, a second input end of the differential operational amplifier is connected with a reference voltage circuit through the second input resistor, and the reference voltage circuit is used for providing fixed reference voltage; the first feedback resistor is connected between the first input end and a first output end of the differential operational amplifier; the second feedback resistor is connected between the second input end and the second output end of the differential operational amplifier. With the differential operational amplification circuit and the image processing system provided by the invention, a single-end varying electric signal is changed into a dual-end varying differential signal, thus, dynamic range of the signal is improved, input requirements of post-end high-speed differential AD sampling are satisfied, anti-interference ability of the signal is improved, noise resistance and electromagnetic interference resistance are improved, and quality of image acquisition is guaranteed from hardware.
Owner:哈工大机器人(山东)智能装备研究院
AI acquisition system and AI acquisition device thereof
PendingCN113852377AAcquisition speed is fastHigh sampling frequencyAnalogue/digital conversionElectric signal transmission systemsLow-pass filterA d converter
The invention discloses an AI acquisition device, which performs common-mode voltage adjustment and differential-mode gain adjustment on a differential voltage signal converted by a differential voltage acquisition circuit through a differential amplifier so as to meet the input requirement of an analog-to-digital converter, so that the analog-to-digital converter performs analog-to-digital conversion on the differential voltage signal to obtain a digital signal, therefore, AI collection is completed. Besides, on one hand, the anti-aliasing matching circuit can be used as a low-pass filter to filter high-frequency interference and improve the acquisition precision, and on the other hand, the anti-aliasing matching circuit can store and raise the potential of the input end of the differential amplifier through the electric energy of the anti-aliasing matching circuit and improve the sampling frequency of the analog-to-digital converter, namely, the acquisition speed of the AI is improved. The invention also discloses an AI acquisition system which has the same beneficial effects as the AI acquisition device.
Owner:HANGZHOU HOLLYSYS AUTOMATION
Radio frequency channel real-time protection and undistorted transmission circuit suitable for ultra-short wave frequency band and configuration method of radio frequency channel real-time protection and undistorted transmission circuit
PendingCN114257185AHigh maximum input voltageMeet drive requirementsAmplifier modifications to reduce non-linear distortionAmplifier with semiconductor-devices/discharge-tubesLow noiseNoise (radio)
The invention discloses a radio frequency channel real-time protection and undistorted transmission circuit suitable for an ultrashort wave frequency band and a configuration method thereof, and the circuit comprises a broadband amplification circuit, the in-phase input end and output end of which are respectively connected with an RFIN and an output RFOUT; the in-phase input end of the detection driving circuit is connected to the output end of the broadband amplification circuit; the input end of the detection circuit is connected to the output end of the detection driving circuit; and the input end and the output end of the linear optocoupler feedback circuit are respectively butted with the output end of the detection circuit and the inverted input end of the broadband amplification circuit. The circuit can work in a frequency band of 30MHz-88MHz, can be used for a driving end of a radio frequency power amplifier of an ultra-short wave radio station, and can also be used for anti-burning of a receiving channel of the ultra-short wave radio station and input protection of intermediate frequencies of ADC ends of various receivers. Comprising a low-noise broadband current feedback operational amplifier, a linear optocoupler and the like. The low-noise broadband current feedback operational amplifier has the advantages that the working frequency is high, the anti-burning power can reach 2W, the gain adjustment is convenient, the price is low, and the like.
Owner:MIANYANG NETOP TELECOM EQUIP
Servo power module
PendingCN110289763AImprove power densityReduce volumeDc-dc conversionElectric variable regulationControl theoryHigh power density
The invention relates to a servo power module. The servo power module includes a power module set and a discharge circuit, wherein the power module set is composed of multiple power modules connected in series, each power module has different voltage and power outputs, the multiple power modules are combined in series, so the relatively large voltage and power outputs can be achieved by the power module set, the limitation of the high power output of the servo power module in the prior art can be overcome, the servo power module is made to have relatively high power density, instantaneous power output capacity is improved, and power input requirements of a motor are met. In addition, the servo power module has high power density, so the size and the weight of the servo power module can be reduced, moreover, the servo power module is provided with the discharge circuit, a pumping voltage generated by the motor superposed at an output end of the power module set can be suppressed, stability of the output end voltage of the servo power module is guaranteed, and thereby stability of power supply of a latter device is further guaranteed.
Owner:XIAN HOWE POWER SUPPLY CO LTD
Liquid weight data acquisition circuit of body cavity hyperthermal perfusion treatment machine
PendingCN108844611AImprove anti-interference abilityExact zeroWeighing indication devicesWeighing apparatus for materials with special property/formElectricityInterference resistance
The invention discloses a liquid weight data acquisition circuit of a body cavity hyperthermal perfusion treatment machine. The liquid weight data acquisition circuit is composed of a weight detectingcircuit, a differential amplifying circuit and a level matching circuit. The weight detecting circuit, the differential amplifying circuit and the level matching circuit are successively connected electrically. The weight detecting circuit detects liquid weight change in the container. After a milivolt-grade electric signal is generated, the differential amplifying circuit performs amplification.The level matching circuit performs zero-value adjustment and satisfaction adjustment on an input amplifying circuit so that the output signal of the liquid weight data acquisition circuit has accurate zero value and accurate satisfaction value. Furthermore the output signal level is between 0 and +5V and matches an input interface signal level of a data acquisition analog quantity, thereby satisfying an analog-to-digital conversion input requirement. Furthermore the liquid weight data acquisition circuit has effects of reducing distortion rate and improving interference resistance of a transmitted signal.
Owner:中山市中健医疗设备有限公司
Miniature multichannel sensor signal preprocessing module
InactiveCN109656296AReduce complexityReduce noiseAnalogue-digital convertersAircraft components testingSignal processing circuitsComputer module
The invention relates to a miniature multichannel sensor signal preprocessing module which has a modular circuit form and an independent packaging structure. The miniature multichannel sensor signal preprocessing module has advantages of relatively high integration degree, small size, high suitability for different hardware platforms and different embedded data acquisition systems with different structure forms, and high application flexibility. The signal preprocessing module has a unified electrical interface. When the type and the number of the sensors of the data acquisition system change,changing of the signal preprocessing module is required, and re-designing of the printed circuit is not required. The signal preprocessing module realizes high integration degree of a signal processing circuit between a sensor and an A / D conversion circuit, thereby supplying power supply excitation and signal processing for multiple types of sensors, and reducing complexity in hardware designingof the data acquisition system. The signal preprocessing module optimizes and solidifies the principle and printed circuit board designing of different types of sensor signal processing circuits. Noise of a signal chain is effectively reduced, and total precision of the data acquisition system is improved.
Owner:中国船舶重工集团公司第七0五研究所
Receiving chip circuit and communication system
The embodiment of the invention discloses a receiving chip circuit and a communication system; wherein, the receiving chip circuit comprises M receiving chips; in the M receiving chips, the input ends of N receiving chips are respectively provided with a regulating circuit which is used for gaining energy of clock signals input into the input end of the N receiving chips in a selected frequency band to a preset value; wherein, N is an integer which is more than zero and M is larger than N. The communication system comprises a PCB, which is provided with a clock chip and the receiving chip circuit; and the clock chip provides clock signals for the M receiving chips in the receiving chip circuit by transmission lines. The embodiment of the invention can effectively improve rising rate of the clock signals, reduce the rising time of the clock signals, meet the input requirements of working chips and guarantee the stable working of the working chips.
Owner:BEIJING XINWANG RUIJIE NETWORK TECH CO LTD
A rotating shaft angle and speed measuring device
ActiveCN108562326BHigh detection sensitivityEasy to assembleMeasurement devicesElectrical resistance and conductanceMagnetic reluctance
Owner:北京玻迅基业科技有限公司
A Compressive Sensing-Based Ultrasonic Guided Wave Field Damage Detection Method Applicable to Plate Structures
ActiveCN109884187BMeet the input requirementsFulfil requirementsAnalysing solids using sonic/ultrasonic/infrasonic wavesProcessing detected response signalFull waveWave field
The invention discloses a compressive sensing-based ultrasonic guided wave field damage detection method suitable for plate structures, the steps of which include: constructing an SLDV sampling system; determining space sparse sampling grid coordinates, inputting the sampling coordinates into the SLDV sampling system, respectively Collect ultrasonic guided wave signals in the healthy state and the damaged state, and subtract the two sets of signals to obtain the difference signal containing the damage scattering information; randomly estimate the position of the damage scattering source to obtain the assumed source coordinates; establish the compressed sensing equation , and use the basis tracking denoising algorithm to solve the excitation function of the hypothetical source; use the obtained excitation function to reconstruct the full wave field, and perform RMS imaging on the reconstructed full wave field to obtain the damage imaging result. The present invention applies compressed sensing technology to the field of ultrasonic guided wave field damage detection, utilizes spatially regularly distributed sparse sampling signals for wave field reconstruction and damage imaging, can reduce the measurement time for obtaining the full wave field by more than 90%, and simultaneously obtains The reconstructed wavefield has a coherence coefficient close to 0.8 with the full measured wavefield.
Owner:JIANGSU UNIV
A Soft Start Circuit for Switching Power Supply Used in Bipolar Error Amplifier
InactiveCN104038041BMeet the input requirementsUniversally applicablePower conversion systemsElectricityType error
The invention relates to the technical field of analog integrated circuits, in particular to the design of a switching power supply soft-start circuit for a bipolar error amplifier. The invention includes a reference voltage switching circuit and an error amplifier bias circuit, and uses the principle of clamp feedback to realize smooth switching from the beginning to the end of the soft start process. The beneficial effect of the present invention is that it has universal applicability, can meet the input requirements of bipolar error amplifier and MOS error amplifier at the same time, and the circuit will not appear glitch voltage in the power-on process, and can realize smooth transition, thereby improving System stability and reliability. The invention is especially suitable for soft start circuits of switching power supplies.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA
Diagnosis system based on multipath acquisition of gearbox operation vibration data
InactiveCN112014100ATimely detection of abnormal vibrationMeet the input requirementsMachine part testingSubsonic/sonic/ultrasonic wave measurementDigital conversionA d converter
The invention discloses a diagnosis system based on multipath acquisition of gearbox operation vibration data. The diagnosis system comprises a sensor excitation output circuit, a double-amplificationcircuit, a synchronous analog-to-digital conversion circuit and a diagnosis module, wherein the sensor excitation output circuit is used for outputting a gearbox vibration signal; the double-amplification circuit is used for amplifying the gearbox vibration signal to generate two paths of amplified signals; the synchronous analog-to-digital conversion circuit is used for converting the two pathsof amplified signals into digital signals; and the diagnosis module is used for outputting and selecting the valid digital signal to monitor a gearbox operation vibration state. According to the diagnosis system, the double amplification circuits are arranged, the small gearbox operation vibration signal is amplified by a certain multiple to meet the input requirement of the analog-to-digital converter, meanwhile, the signal gearbox operation impact large can be reduced by a certain multiple to meet the input requirement of the analog-to-digital converter, the measurement precision of the signal within the full output range is improved, and the abnormity of the monitoring signal can be found in time.
Owner:常州源数菁英软件技术有限公司
Method and device for acquiring continuous physical quantity data
ActiveCN102393214BMeet the input requirementsSuppress random disturbanceDigital technique networkMeasurement arrangements for variableEngineeringVIT signals
Provided is a method for acquiring continuous physical signal such as temperature, pressure and the like. The method comprises the following steps: inputting a voltage signal u representing continuous physical signal; obtaining a sampled signal u k of an analog voltage through an analog sampling channel (1), wherein the sampling frequency is f”h; performing digital low-pass filtering on the u k (6) to obtain a voltage signal u k subjected to low-pass filtering, and resampling the u k to obtain a resample signal u j , wherein the resampling frequency f”y is the same as the sampling frequency required by an application terminal and the sampling frequency f”h is M times of the resampling frequency f”y; and storing and outputting the resample signal u j to the application terminal. Provided also is a corresponding device. The cost of the analog sampling channel is lowered; the u j can be directly applied to industrial automation for substitution of the u j , especially output signals do not contain transient values, the requirements of a stable model on input quantity can be met, the random disturbance can be inhibited, and the measurement accuracy can be improved.
Owner:郝玉山
Rotating shaft angle and speed measuring device
ActiveCN108562326AHigh detection sensitivityEasy to assembleMeasurement devicesElectrical resistance and conductanceElectricity
The invention provides a rotating shaft angle and speed measuring device to improve the measuring precision of an existing rotating shaft angle and speed measuring device. The structure of the devicecomprises a permanent magnet, a chip integrated with a magnetoresistive sensor, and a PCB circuit board. A number of chips are arranged on the upper end face of the PCB circuit board. A number of counter bores are arranged in the lower end face of the PCB circuit board. The axis of each counter bore passes through the centroid of a chip. The permanent magnet and the PCB circuit board are firmly connected through the counter bores. The magnetoresistive sensor is provided with a first power supply connection end, a grounding end, a first signal output end and a second signal output end. The first signal output end is connected in series with a first resistor and is electrically connected with a second power supply connection end. The first signal output end is connected in series with a second resistor and is grounded. The second signal output end is connected in series with a third resistor and is electrically connected with the second power supply connection end. The second signal output end is connected in series with a fourth resistor and is grounded. According to the invention, the connection relationship between the permanent magnet and the PCB circuit board is improved, and the detection sensitivity is greatly improved.
Owner:北京玻迅基业科技有限公司
A Bigru Network Drilling Condition Recognition Method Combined with Attention Mechanism
ActiveCN114596010BReduce the black box effectExpanding the problem of small sample sizeCharacter and pattern recognitionResourcesWell drillingEngineering
The invention discloses a BiGRU network drilling condition identification method combined with an attention mechanism. The method uses a large amount of actual data generated during drilling as a basis, and carries out a series of data enhancement methods to expand the number of samples to the greatest extent. less problems. And in order to reduce the black box effect during machine learning, a decision tree recognition model guided by semi-empirical formulas combined with actual data is designed to assist manual data annotation. For the time series drilling information, a bidirectional gate control unit network capable of extracting sequence features is used to train the model, and the parameters are strictly adjusted. Finally, the data of a single well that did not participate in the training was used to test the generalization ability of the model without transfer learning and pre-training; comparison experiments proved that this method can ensure a high accuracy in the time series prediction of drilling conditions The feasibility and versatility under the conditions have practical application value.
Owner:SOUTHWEST PETROLEUM UNIV
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