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31results about How to "Facilitate signal acquisition" patented technology
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Driving style estimation method based on driving pattern transition probability
ActiveCN106023344AFacilitate signal acquisitionIncrease credibilityRegistering/indicating working of vehiclesCharacter and pattern recognitionEngineeringEstimation methods
The invention provides a driving style estimation method based on driving pattern transition probability, wherein the method includes the steps: step 1, acquiring actual driving data of a driver, wherein the actual driving history data at least include the steering wheel rotary angle, the vehicle speed, the longitudinal acceleration speed and the transverse acceleration speed; step 2, according to the actual driving data, dividing driving behaviors into N driving behavior patterns; step 3, determining the driving behavior pattern transition probability, wherein the driving behavior pattern transition probability is the transition probability between arbitrary two driving behavior patterns in the N driving behavior patterns; and step 4, taking the driving behavior pattern transition probability as a training sample training classifier, to perform driving style estimation through the classifier.
Owner:TSINGHUA UNIV
Digital passive infrared static human body detector and detection method thereof
ActiveCN103197354AControl and detection speedControl and detection of rotation angleOptical detectionPyrometry using electric radation detectorsFresnel lensHuman body
The invention discloses a digital passive infrared static human body detector which comprises an outer shell, a microcontroller and a PIR sensor and is characterized in that a Fresnel lens is arranged at the front end of the PIR sensor, a matched reflector is installed between the PIR sensor and the Fresnel lens, and the microcontroller is connected with a power source module, a drive motor and a detection switch. A detection method includes: a, background noise is learned, and a background noise sequence is formed; b, dynamic human body detection is carried out; c, delayed output is carried out; d, static detection is judged whether to be carried out or not; e, detection signals are acquired, and a detection signal sequence is formed; f, the digital mutual correlation calculation is carried out; and g, a static human body is judged whether to exist or not. According to the detector and the method, false assumption of a prior passive static human body detector and the defect that the human body under the static state can not be detected are abandoned and avoided, and the human body under the static state in a detection area can be effectively and accurately detected so that the static detection is achieved.
Owner:JINAN SINE LEAD ELECTRONICS TECH
Optical fingerprint identification circuit and array
An optical fingerprint identification circuit comprises a reset unit, a photodiode, a storage capacitor, an amplification transistor and a data writing unit. The reset unit comprises a reset transistor, a reset signal line and a reset voltage end and is used for resetting the grid electrode of the amplification transistor; the photodiode is used for receiving an optical signal to generate a photocurrent and outputting the photocurrent to the storage capacitor; the amplifying transistor is used for amplifying a signal received by the amplifying transistor and outputting the signal to the data writing unit.
Owner:WUHAN CHINA STAR OPTOELECTRONICS TECH CO LTD
Navigation system using spreading codes based on pseudo-random noise sequences
ActiveUS20140354473A1Good correlationFacilitate signal acquisitionSatellite radio beaconingTransmissionCode moduleElement by element
One embodiment of the invention provides a receiver for use in a navigation system comprising multiple transmitters. Each transmitter transmits a positioning signal comprising a pseudo-random noise (PRN) sequence corresponding to the respective transmitter. The receiver comprises a code module for supplying multiple PRN sequences corresponding to the respective multiple transmitters; and a correlator for correlating the PRN sequences supplied by the code module with an incoming signal. The multiple PRN sequences are based on a single Sidelnikov / Lempel / Cohn / Eastman (SLCE) generative sequence uSLCE, and each of said multiple PRN sequences, denoted ui satisfies the equation: ui=uSLCE⊕TiuSLCE, where ⊕ indicates element by element binary XOR addition, and Ti indicates a cyclic shift of i chips.
Owner:EUROPEAN SPACE AGENCY
Signal noise removing method based on reconstruction signal substituting frequency spectrum data
InactiveCN101135722AHigh resolutionHigh precisionImage enhancementDiagnostic recording/measuringFrequency spectrumSignal-to-noise ratio (imaging)
The method comprises: extracting the singular point and singular value from the observed signal g(x); using the singular point and singular value to construct the relevant singular function; using the frequency spectrum zero-setting threshold preset by the system to construct the noise-removing function and permutation function; according to said result, using the reconstructed signal substitution method to get the noise-removed signals.
Owner:骆建华
Intelligent alternative-direct-current integrated power supply system
InactiveCN103051052ASimple designAchieving state-of-the-art maintenanceCircuit arrangementsControl engineeringIntelligent management
An intelligent alternative-direct-current integrated power supply system comprises a two-power-supply automatic switching device, an inversion module and a main monitor, which form an alternative-current / direct-current uninterrupted power supply system containing a uniform monitoring management function. By adopting a layered distributive architecture, the dispersed measure and control and centralized management can be realized. A communication storage battery group and a charging device are canceled, a direct-current / direct-current (DC / DC) conversion module is directly hung on a charging bus; an uninterrupted power supply (UPS) storage device is canceled, the inversion module is directly hung on the charging bus, and the inversion power supply is adopted for powering important loads such as a computer and accidental illumination; and the secondary power distribution management, the station power supply device intelligent management and state examination are uniformly carried out. The alternating current and direct current, the inversion and the communication power supply system of an entire transformer substation power supply can be uniformly monitored on one platform, the human resource can be uniformly dispatched, and the integral management level of the station power supply can be improved.
Owner:JIANGSU DATANG KEYUAN ELECTRIC CO LTD
Biomedical electrode with surface micro-structure array and manufacturing method thereof
ActiveCN103393419AReduce contact resistanceHigh measurement accuracyDiagnostic recording/measuringSensorsMicro structureMetallic electrode
The invention relates to a biomedical electrode, in particular to a biomedical electrode with a surface micro-structure array and a manufacturing method thereof. The biomedical electrode with the surface micro-structure array characteristic comprises a metal electrode core, a foam materiel back lining and a shielded conductor; the manufacturing method of the biomedical electrode comprises the steps as follows: sheet metal serves as the raw material of the metal electrode core, a laser micro-processing technology is adopted to form a micro-structure array with the longitudinal distance of 0.1-0.3 mm and the transverse distance of 0.1-0.3 mm on the metal electrode core, cleaning and drying are performed, then hydrochloric acid is utilized to remove an oxidizing layer and impurities, alcohol is utilized for cleaning, and a Au or Ag / AgCl thin layer is plated on the surface of the metal electrode core; the metal electrode core is stuck to the surface of the foam materiel back lining by glue; the shielded conductor penetrates through the foam materiel back lining, and is connected to the surface of the metal electrode core with the method of filling conductive silver adhesive, and solderless connection of the metal electrode core with the shielded conductor can be formed after the conductive silver adhesive is solidified, so that the biomedical electrode with the surface micro-structure array is obtained.
Owner:XIAMEN UNIV
Hyperspectral three-dimensional laser radar system based on near-infrared full-waveform ranging
ActiveCN109613560AFacilitate signal acquisitionStrong energy distributionColor/spectral properties measurementsElectromagnetic wave reradiationRadar systemsFull waveform
The invention provides a hyperspectral three-dimensional laser radar system based on near-infrared full-waveform ranging. The hyperspectral three-dimensional laser radar system comprises a laser emission unit, a signal detection unit, a synchronous collection unit and a data processing unit, the laser emission unit comprises a super-continuum spectrum laser device, and the super-continuum spectrumlaser device is pumped by a near-infrared light source to emit a super-continuum spectrum white laser covering visible light and near-infrared light; the signal detection unit comprises a full-waveform ranging detection system based on a near-infrared waveband, a scanning galvanometer, a telescope, a spectrometer and a multi-channel detector; and the synchronous collection unit comprises a multi-channel digital delay pulse generator and controls collection of the near-infrared waveband detector and multi-channel visible light information collection, so that distance information and spectral information correspond. The hyperspectral three-dimensional laser radar system can directly and simultaneously obtain visible light and near-infrared laser spectral information and laser point cloud spatial information of a target scalar, and can be widely applied to the fields of surveying and mapping, remote sensing, target classification and recognition and the like.
Owner:WUHAN UNIV
Navigation system using spreading codes based on pseudo-random noise sequences
ActiveUS10088573B2Facilitate signal acquisitionLow cross channel interference)Position fixationRadio transmissionCode moduleComputer module
One embodiment of the invention provides a receiver for use in a navigation system comprising multiple transmitters. Each transmitter transmits a positioning signal comprising a pseudo-random noise (PRN) sequence corresponding to the respective transmitter. The receiver comprises a code module for supplying multiple PRN sequences corresponding to the respective multiple transmitters; and a correlator for correlating the PRN sequences supplied by the code module with an incoming signal. The multiple PRN sequences are based on a single Sidelnikov / Lempel / Cohn / Eastman (SLCE) generative sequence uSLCE, and each of said multiple PRN sequences, denoted ui satisfies the equation: ui=uSLCE⊕TiuSLCE, where ⊕ indicates element by element binary XOR addition, and Ti indicates a cyclic shift of i chips.
Owner:EUROPEAN SPACE AGENCY
Wireless sensor module
InactiveCN105136456AMake sure it's fully fixedReliable Payload TransferTelemetry/telecontrol selection arrangementsRolling contact bearingsLine sensorComputer module
Owner:AB SKF
Radar detection technology based ship monitoring method and system
InactiveCN108761440AIncrease autonomyReal-time processingSoftware designProgram controlSignal conditioningControl signal
The invention discloses a radar detection technology based ship monitoring method and system. The radar detection technology based ship monitoring system comprises a monitoring information fusion module, a network configuration module and a signal conditioning module; the monitoring information fusion module receives a control signal from a main control device; an input end of the monitoring information fusion module receives a sensing signal of the signal conditioning module; a signal end of the signal conditioning module receives feedback signals of a monitoring acquisition module, an imagesensing module, an acoustic sensor and a thermal sensor; and a network port of the monitoring information fusion module transmits information to a shared platform through the network configuration module. The system uses the WebGIS technology to save mass spatial data information in the server side, and returns corresponding data information according to different requests of different users, so that the GIS system can quickly and efficiently respond to client requests, the users can process spatial geographic data in real time in this manner, and the user autonomy is improved.
Owner:WUHU HANGFEI SCI & TECH
Digital passive infrared stationary human body detector and detection method thereof
ActiveCN103197354BFacilitate signal acquisitionReduce usageOptical detectionPyrometry using electric radation detectorsMicrocontrollerFresnel lens
The invention discloses a digital passive infrared static human body detector which comprises an outer shell, a microcontroller and a PIR sensor and is characterized in that a Fresnel lens is arranged at the front end of the PIR sensor, a matched reflector is installed between the PIR sensor and the Fresnel lens, and the microcontroller is connected with a power source module, a drive motor and a detection switch. A detection method includes: a, background noise is learned, and a background noise sequence is formed; b, dynamic human body detection is carried out; c, delayed output is carried out; d, static detection is judged whether to be carried out or not; e, detection signals are acquired, and a detection signal sequence is formed; f, the digital mutual correlation calculation is carried out; and g, a static human body is judged whether to exist or not. According to the detector and the method, false assumption of a prior passive static human body detector and the defect that the human body under the static state can not be detected are abandoned and avoided, and the human body under the static state in a detection area can be effectively and accurately detected so that the static detection is achieved.
Owner:JINAN SINE LEAD ELECTRONICS TECH
Lower limb artificial limb continuous control system driven by electromyographic signals
ActiveCN112107397AFacilitate signal acquisitionImprove recognition accuracyCharacter and pattern recognitionArtificial legsThighKnee Joint
The invention provides a lower limb artificial limb continuous control system driven by electromyographic signals. The system comprises a lower limb artificial limb, a myoelectricity sensor and an upper computer, wherein the lower limb artificial limb comprises a receiving cavity, a thigh connecting rod, a knee joint, a shank connecting rod, an ankle joint and a sole; the myoelectricity sensor isfixed to the skin surface of a healthy side lower limb in a wearable mode; and the upper computer comprises a myoelectricity decoder and a controller, receives the myoelectricity signals from the myoelectricity sensor and generates continuous control instructions for the lower limb artificial limb. According to the lower limb artificial limb continuous control system, the problems that existing lower limb artificial limb related research is mostly focused on intention recognition, and research on how to convert a motion intention recognition result into a control instruction suitable for the lower limb artificial limb is little, are solved.
Owner:UNIV OF SCI & TECH OF CHINA
Photoelectric control composite cable for mining machine
InactiveCN104200895AGood physical and mechanical propertiesImprove corrosion resistancePower cables with screens/conductive layersInsulated cablesElectrical conductorInsulation layer
The invention discloses a photoelectric control composite cable for a mining machine. The photoelectric control composite cable comprises an optical control wire core, a power wire core and a ground wire core; the optical control wire core comprises an optical cable, a plurality of control wire cores and an isolation belt; the plurality of control wire cores are snapped to the optical cable; the isolation belt wraps the optical cable and the control wire cores; every control wire core comprises a first conductor and a first insulation layer; the power wire core comprises a second conductor; a second insulation layer and an insulation shielding layer wrap the second conductor; the ground wire core comprises a third conductor and a semi-conducting layer; filler is arranged in an arrangement gap of the optical control wire core and the power wire core to form a cable core; a wrapping belt layer, an inner sheath layer, a fiber reinforcement layer and an outer sheath layer wrap the cable core. According to the photoelectric control composite cable for the mining machine, the signal collection and electrical control performance is excellent, the safety, the reliability and the durability are high, the integrated photoelectric control composite structure is simple, the transmission performance is stable, and the photoelectric control composite cable can be widely applied to integrated signal and control and power signal composite transmission of mining spaces such as coal, mining and tunnel excavation.
Owner:江苏天地龙电缆有限公司
Impedance detecting device and method for in-vivo detection of spongioblastoma boundary and application of device
PendingCN107242872AWeak resistanceImprove the quality of surgical treatmentDiagnostic recording/measuringSensorsElectricityElectrical resistance and conductance
The invention relates to the technical field of biological tissue electrical impedance detection, in particular to an electrical impedance detection device, method and application for in vivo detection of malignant glioma boundaries. The invention designs and manufactures a four-probe type and ring-shaped in-body impedance measurement sensor based on the four-electrode method. Using the impedance analyzer to measure the impedance of glioma and brain tissue, the results show that the impedance amplitude of glioma is smaller than that of brain tissue. Furthermore, the inventors proposed the concept of the slope of the rising slope based on the law of impedance changes, and found that the slope value of the glioma is smaller than that of the brain tissue. For the glioma U87, the average value of γ of the brain tissue is 352.57% larger than it. And this difference is as high as 150.23% for glioma C6, which indicates that the rising slope of glioma U87 / C6 in the impedance map is smaller than that of brain tissue. Therefore, the slope of the rising slope in the impedance spectrum can be used as an index parameter to distinguish glioma from brain tissue.
Owner:SHANGHAI CHANGHAI HOSPITAL
Movable portable parking apron lifting lightning rod and system thereof
PendingCN109449765AFlexible moving processEasy to moveElectric light circuit arrangementCorona dischargeHydraulic cylinderAviation
The invention relates to a movable portable parking apron lifting lightning rod, comprising a lifting lightning rod, wherein the lifting lightning rod comprises a pole, a multilevel lifting rod and lightning receiving pin, a base is arranged on a lower end of the pole, two hydraulic cylinders are arranged on both ends of the base, a supporting plate is arranged on the lower end of an expansion link of each hydraulic cylinder, and walking wheels are arranged on a lower side face of the base; two hoops are arranged on the pole, and a lifting rope is connected between the two hoops. A parking apron lightning protection security and protection system comprises the aforementioned movable portable parking apron lifting lightning rod, as well as a grounding system, a security and protection system and a background service system; the grounding system comprises a grounding wire, the grounding wire is connected with a copper bar, the copper bar is connected with a grounding body; and the security and protection system comprises an aviation obstacle indicator lamp and a controller; the background service system comprises a switch, a computer host, a display and a cloud server. The movable portable parking apron lifting lightning rod provided by the invention has the advantages of convenience for carrying, convenience for moving, convenience for onsite installation and capability of effectively prolonging the service life of the lightning rod.
Owner:河南扬博不锈钢制品有限公司
Pneumatic gear shifting system of automotive mechanical gearbox
InactiveCN106499813AStrong interactionReduce work intensityGearing controlControl systemDisplay device
The invention discloses a pneumatic gear shifting system of an automotive mechanical gearbox. The pneumatic gear shifting system of the automotive mechanical gearbox comprises a controller, an electromagnetic reversing valve integrated package, an electric clutch system, a pneumatic gear shifting mechanism, a gear displayer and an electronic gear shifting handle. The electromagnetic reversing valve integrated package is integrated by electromagnetic reversing valves, one end of the electromagnetic reversing valve integrated package is connected with an automobile gas storage tank, and the other end of the electromagnetic reversing valve integrated package is connected with the pneumatic gear shifting mechanism. The electric clutch system is connected with the controller. The controller and the electromagnetic reversing valve integrated package are integrated on a control system of an automobile. The gear displayer is integrated on a display panel of the automobile. The electronic gear shifting handle is arranged in a control area of the automobile. The electric clutch system is fixed to the outer side of the gearbox. The pneumatic gear shifting mechanism is fixed to the gearbox.
Owner:林会明
Method, device and equipment for identifying partial discharge mode of high-voltage cable terminal
PendingCN112881879AReduce redundancyReduce dimensionalityTesting dielectric strengthElectric power equipmentPower equipment
The invention discloses a method, a device and equipment for identifying a partial discharge mode of a high-voltage cable terminal, and belongs to the technical field of insulation monitoring of high-voltage power equipment. The method comprises the steps: obtaining partial discharge signals of the cable terminal by using a high-frequency measurement method; performing modal decomposition on the discharge signals to obtain an effective modal of the partial discharge signals; obtaining a feature matrix according to the effective mode; and inputting the feature matrix into a mode recognition model, and outputting the type of the partial discharge mode. The method is low in cost, convenient to install, accurate in partial discharge signal acquisition and high in pattern recognition accuracy.
Owner:DAQING POWER SUPPLY COMPANY OF STATE GRID HEILONGJIANG ELECTRIC POWER COMPANY +2
Impact monitoring and positioning method based on two-dimensional beam focusing theory
ActiveCN111024351AHigh-precision shock monitoringEasy wiringAircraft health monitoring devicesSubsonic/sonic/ultrasonic wave measurementTime domainFrequency spectrum
The invention discloses an impact monitoring and positioning method based on a two-dimensional beam focusing theory. The method specifically comprises the following steps: 1, monitoring a signal whena structure is impacted by adopting a piezoelectric sensor; sending the acquired impact signal to an upper computer by using a data acquisition card, performing Fourier transform on the impact signalin the upper computer to obtain a signal spectrogram, selecting a frequency peak value of the spectrogram as a center frequency to perform wavelet analysis on the signal to obtain a time domain signalcorresponding to the center frequency, and enveloping the obtained time domain signal; 2, solving the position of an impact point by using a two-dimensional beam focusing positioning method, and judging whether the impact point is in an external field or not; and 3, if the positioning coordinates are not in the external field, considering that the positioning result is located in a blind area ofthe internal field two-dimensional beam focusing positioning method, solving the positioning coordinates (a, b) again, and outputting the positioning coordinates as a final positioning result. According to the invention, the problems of positioning dead zones and low positioning precision of the existing one-dimensional beam focusing positioning are solved.
Owner:XIAN UNIV OF TECH
Automatic warning system and method of rotor vortex ring status based on aerodynamic noise monitoring
ActiveCN109018397BNo effect on aerodynamic performanceReduce driving burdenAircraft indicatorsNoise monitoringEarly warning system
The invention discloses a rotor vortex ring state automatic early warning method based on aerodynamic noise monitoring. The automatic warning method comprises the following steps of: acquiring aerodynamic noise signals of a fuselage during descent or landing flight collected by a microphone having a plurality of microphones arranged on a fuselage surface of a helicopter or a tilt rotor aircraft; The aerodynamic noise signal is analyzed by frequency spectrum, and the aerodynamic noise signal in frequency domain is obtained. The low frequency noise signal is filtered to obtain the noise signal of rotor and tail rotor in frequency domain and then separated. Dynamic analysis of rotor aerodynamic noise signals in frequency domain; When the noise pressure level corresponding to the rotor blade passing frequency of 6-40 times is increasing, an alarm command is sent to the rotor to alert that the rotor has entered into a dangerous vortex ring state. The invention can more conveniently realizetimely and automatic early warning when the rotor enters the vortex ring state, and ensure the safety of the helicopter and the tilt rotor aircraft when landing.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Continuous Control System of Lower Limb Prosthesis Driven by Myoelectric Signal
ActiveCN112107397BFacilitate signal acquisitionImprove recognition accuracyCharacter and pattern recognitionArtificial legsThighPhysical medicine and rehabilitation
The invention provides a continuous control system for a lower limb artificial limb driven by electromyographic signals. The system includes lower limb prosthesis, myoelectric sensor and host computer. Lower limb prosthetics include sockets, thigh links, knee joints, calf links, ankle joints, and soles. The myoelectric sensor is fixed on the skin surface of the lower limb of the healthy side through a wearable method. The upper computer includes a myoelectric decoder and a controller, which receives the myoelectric signal from the myoelectric sensor and generates continuous control instructions for the lower limb prosthesis. The invention solves the problem that most of the existing lower limb prosthetic studies focus on intention recognition, and there is less research on how to convert the motion intention recognition results into control instructions suitable for lower limb prostheses.
Owner:UNIV OF SCI & TECH OF CHINA
Monitoring system for delaying Alzheimer's disease based on brain wave signal analysis technology
PendingCN112914512AReduce own weightLess discomfortDiagnostic recording/measuringSensorsPattern recognitionDisease monitoring
The invention relates to the field of Alzheimer's disease monitoring, in particular to a monitoring system for delaying Alzheimer's disease based on a brain wave signal analysis technology. The system comprises brain wave acquisition equipment used for acquiring brain wave signals and transmitting the signals and intelligent algorithm training equipment used for receiving the brain wave signals and carrying out processing analysis and training adjustment, wherein the intelligent algorithm training device comprises an algorithm module used for receiving the brain wave signals and carrying out core algorithm processing and a training module used for receiving result values of the algorithm module and carrying out classification and grading adjustment; and the algorithm module comprises an intelligent processing module for carrying out core algorithm processing on brain wave signal data and a state analysis module for receiving an algorithm processing result value and carrying out user state grade classification. According to the invention, EEG signal monitoring and data feedback excitation adjustment are realized, so that the monitoring data are more accurate and representative, and targeted state level classification, training system adjustment and disease delay are realized.
Owner:HENAN ANYTHING TECH DEV CO LTD
A biomedical electrode with a surface microstructure array and its manufacturing method
ActiveCN103393419BReduce contact resistanceHigh measurement accuracyDiagnostic recording/measuringSensorsMicro structureAlcohol
Owner:XIAMEN UNIV
An apparatus for acquiring signals from a pregnant subject
PendingUS20220142476A1Facilitate signal acquisitionPrecise positioningDiagnostic recording/measuringSensorsEngineeringAcoustics
An apparatus for acquiring signals from a pregnant subject includes a flexible portion that is conformable to an abdomen of the subject. The flexible portion includes a plurality of signal acquisition points, each signal acquisition point comprising a contact adapted to electrically couple to a respective electrode and signal acquisition circuitry. The flexible portion includes a first linear section that is generally aligned along a first axis; and a second linear section extending from the first linear section, the second linear section being generally aligned along a second axis that is perpendicular to the first axis; wherein a first group of the signal acquisition points is located along the first axis and a second group of the signal acquisition points is located along the second axis.
Owner:BIORITHM PTE LTD
Circuit and method for continuously and dynamically measuring joint movement angle
InactiveCN113080879AFacilitate signal acquisitionProgramme controlAngle measurementControl engineeringHemt circuits
The invention discloses a circuit for continuously and dynamically measuring a joint movement angle, which comprises a Bluetooth WIFI main control module, a nine-axis inertial sensor module, a voltage stabilizing circuit module and a power supply input module. The Bluetooth WIFI main control module is in communication connection with the nine-axis inertial sensor module through an I2C bus; the voltage stabilizing circuit module is connected with the power supply input module, and the output of the voltage stabilizing circuit module is connected with the power supplies of the Bluetooth WIFI main control module, the low-speed high-precision magnetometer and the high-speed low-precision magnetometer; the nine-axis inertial sensor module comprises a sensor chip, a low-speed high-precision magnetometer and a high-speed low-precision magnetometer; and the Bluetooth WIFI main control module comprises a main control chip. According to the circuit for continuously and dynamically measuring the joint motion angle, two circuits for measuring the joint composite motion angle can be conveniently bound to limbs on the two sides of a joint, and therefore information collection is conducted on different devices through a nine-axis inertial sensor.
Owner:陕西福音假肢有限责任公司
A carrier pulsed eddy current detection method and device
ActiveCN110361444BReduced precision requirementsReduce speed requirementsNuclear energy generationMaterial magnetic variablesSquare waveformCarrier signal
The invention belongs to the technical field of non-destructive testing, and specifically discloses a carrier-type pulsed eddy current detection method and device. Firstly, a metal plate is installed under the pulsed eddy current sensor, and a square wave excitation is applied to the pulsed eddy current sensor to detect the reduction of the square wave excitation. The attenuation curve of the induced voltage in the pulsed eddy current sensor with time, that is, the carrier signal; then place the metal piece to be tested under the pulsed eddy current sensor with the metal plate installed, and apply square wave excitation to the pulsed eddy current sensor to detect the reduction of the square wave excitation. The attenuation curve of the induced voltage over time in the hourly pulse eddy current sensor, that is, the modulation signal; the original pulse eddy current detection signal of the metal part to be tested is obtained by demodulating the carrier signal and the modulation signal, which solves the problem of pulse eddy current detection of metal components such as thin plates and small-diameter tubes The problem of fast signal attenuation and difficulty in effective acquisition expands the scope of application of pulsed eddy current testing.
Owner:HUAZHONG UNIV OF SCI & TECH
Single-stage suspension system and axle box built-in high-speed motor train unit non-power bogie
PendingCN114435419AMeet anti-roll performanceGood sealing functionAxle-boxesBogiesPower steeringBogie
The invention discloses a primary suspension system and an axle box built-in type non-power bogie of a high-speed motor train unit with the primary suspension system, and belongs to the technical field of bogies of rail transit vehicles. The axle box body is erected between a framework and an axle, the primary suspension spring is arranged between the axle box body and the framework, and the primary suspension spring comprises two glass fiber springs which are symmetrically arranged and a laminated spring which is arranged at the lower parts of the glass fiber springs and is used for being connected with the axle box body; wherein a deformation space is formed between the two glass fiber springs, rubber inserting devices are arranged at the two ends of each glass fiber spring, and the two glass fiber springs are connected through the rubber inserting devices in a hinged mode so that the two glass fiber springs can synchronously release longitudinal displacement. The lightweight design requirement of the framework is met, the transverse occupied space can be reduced, and meanwhile the high-speed application requirement of the motor train unit is met.
Owner:CRRC CHANGCHUN RAILWAY VEHICLES CO LTD
Business hall work number plate turnover control system and device
PendingCN112327670AEasy flip setupEasy to set upOptical detectionProgramme control in sequence/logic controllersControl systemPower switching
The invention belongs to the technical field of computer application, and provides a business hall work number plate turnover control system, which comprises a power supply wiring, a power supply switch, a power supply module and a main control module, and is characterized in that the main control module is connected with an infrared obstacle detection module for signal acquisition, a forward limiter and a reverse limiter; the master control module is also connected with a time delay module and a servo module for controlling the motor; and the time delay module is connected with the servo module. According to the system, the job number plate can be automatically turned over when the human body cannot be detected, so that the consistency of personnel and on-duty information is achieved. Theinvention further provides a business hall work number plate turnover device adopting the business hall work number plate turnover control system, which comprises a box body, a box cover, two vertical plates, a work number plate and stop iron. Through the arrangement of the box body, the arrangement of a control system is facilitated. Through the arrangement of the hollow job number plate, turnover arrangement of the job number plate is facilitated, and signal acquisition is facilitated.
Owner:ZHUCHENG POWER SUPPLY CO STATE GRID SHANDONG ELECTRIC POWER CO +1
A Shock Monitoring and Locating Method Based on Two-Dimensional Beam Focusing Theory
ActiveCN111024351BHigh-precision shock monitoringEasy wiringAircraft health monitoring devicesSubsonic/sonic/ultrasonic wave measurementTime domainFrequency spectrum
The invention discloses a shock monitoring and positioning method based on two-dimensional beam focusing theory, which specifically includes the following steps: step 1, using a piezoelectric sensor to monitor the signal when the structure is struck, and using a data acquisition card to collect the shock signal Send it to the host computer, perform Fourier transform on the impact signal in the host computer to obtain the signal spectrum, select the frequency peak of the spectrum as the center frequency to perform wavelet analysis on the signal, obtain the time domain signal corresponding to the center frequency, and analyze the obtained time domain Signal envelope; step 2, use the two-dimensional beam focusing positioning method to find the location of the impact point, and determine whether it is in the outer field; step 3, if the positioning coordinates are not in the outer field, consider that the positioning result is located in the inner field two-dimensional beam focusing positioning In the blind area of the method, the positioning coordinates (a, b) are recalculated and output as the final positioning result. The invention solves the problems of positioning blind area and relatively low positioning accuracy existing in the existing one-dimensional beam focusing positioning.
Owner:XIAN UNIV OF TECH
Signal noise removing method based on reconstruction signal substituting frequency spectrum data
InactiveCN101135722BHigh resolutionHigh precisionImage enhancementDiagnostic recording/measuringFrequency spectrumSignal-to-noise ratio (imaging)
The method comprises: extracting the singular point and singular value from the observed signal g(x); using the singular point and singular value to construct the relevant singular function; using the frequency spectrum zero-setting threshold preset by the system to construct the noise-removing function and permutation function; according to said result, using the reconstructed signal substitution method to get the noise-removed signals.
Owner:骆建华
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