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34results about How to "Small anti-interference ability" patented technology
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UUV (Unmanned Underwater Vehicle) path tracking method based on self-adaption sliding-mode control
ActiveCN106292287ARobustStrong anti-interference abilityAdaptive controlSliding mode controlSelf adaptive
The invention provides a UUV (Unmanned Underwater Vehicle) path tracking method based on self-adaption sliding-mode control. The method comprises the steps of 1, initializing; 2, obtaining a current state of a UUV; 3, establishing an underactuated UUV horizontal error equation to obtain the positional deviation xe, ye and a course deviation value psi e; 4, utilizing a sliding-mode control method to respectively design a speed sliding-mode control law, a position sliding-mode control law and a stem phase angle sliding-mode control law and enabling th ud to be zero, the xe to be zero and the psi e to be zero by controlling thrust Xprop, expected speed (shown in the following image) and torque Nprop; 5, updating a self-adaption law of handover gain and a self-adaption law of boundary layer thickness; 6, performing control input saturation compensation; 7, enabling k = k +1, returning to the step 2 and updating the control laws and the self-adaption laws for the next time to achieve the accurate control on the UUV horizontal path tracking. The UUV path tracking method can only depend on a controller which is designed according to a horizontal dynamical model to stabilize the system and is suitable for various underactuated UUVs.
Owner:HARBIN ENG UNIV
Deepwater semi-submerged drilling platform
ActiveCN101954959ASmall footprintConvenient pre-connection workFloating buildingsEngineeringDrilling riser
The invention relates to a deepwater semi-submerged drilling platform, which comprises floating tanks, an upright post, a transverse supporting rod and a main deck, wherein a drilling block is arranged above a moon pool in the middle of the main deck; and a derrick is arranged on the drilling block. The deepwater semi-submerged drilling platform is characterized in that: a half derrick space for pre-connecting a drilling tool is reserved on one side of the derrick; a water isolating pipe, a drilling stem, a blowout preventer and a production tree are arranged on the main deck around the moon pool respectively; and an anchor moored positioning and dynamic positioning combined position system which consists of front and back four groups of anchor gears distributed on the left and right sides of the main deck is adopted, each group of anchor gears are provided with 3 anchor chains, a dynamic positioning system consists of 8 dynamic thrusters capable of rotating 360 degrees at the front and back four corners of the bottom of the two floating tanks. In the deepwater semi-submerged drilling platform, the maximum operation water depth is up to 3,000 meters, the maximum drilling depth is up to 12,000 meters, and the maximum variable load is up to 9,000 tons. The deepwater semi-submerged drilling platform can operate in the South China Sea, Southeast Asian sea area and West Africa sea area with severe sea conditions efficiently and safely.
Owner:CHINA NAT OFFSHORE OIL CORP +1
Low-power consumption portable electrocardiograph monitor and control method thereof
InactiveCN102274020AHigh measurement accuracyHighly integratedDiagnostic recording/measuringSensorsEcg signalElectrocardiographic monitor
The invention relates to a low-power consumption portable electrocardiograph monitor and a control method thereof, which belongs to the field of medical appliances. The portable electrocardiograph monitor comprises an electrocardiosignal collection unit, an electrocardiosignal analysis and storage unit and an upper computer. The control method comprises the following steps of: step 1: carrying out digital filtering to collected signals by using a wavelet entropy optimal threshold denoising method; step 2: carrying out rejection of baseline drift to the signals processed by step 1 by using a morphological filtering method; and step 3: carrying out disease classification to the signals processed by step 2 by using a support vector machine algorithm. The invention has the advantage of high integrity, and has the characteristics of portability, compactness and economy.
Owner:NORTHEASTERN UNIV
Permanent-magnetic rotor with non-magnetic-permeable distance sleeve and method for manufacturing permanent-magnet rotor
InactiveCN102761211AIncrease profitImprove electromagnetic compatibilityMagnetic circuit rotating partsManufacturing stator/rotor bodiesPermanent magnet rotorWork performance
The invention discloses a permanent-magnetic rotor with a non-magnetic-permeable distance sleeve and a method for manufacturing the permanent-magnetic rotor. The method includes sleeving the non-magnetic-permeable distance sleeve made of a non-magnetic-permeable material on a rotor shaft at first when iron cores of the rotor are mounted on the rotor shaft; then manufacturing the iron cores of the rotor into fan-shaped iron cores; uniformly distributing and fixedly mounting the fan-shaped iron cores of the rotor on the non-magnetic-permeable distance sleeve; encircling four surfaces, except for the arc-shaped upper end surface and a contacting surface with the non-magnetic-permeable distance sleeve, of each fan-shaped iron core, which is fixedly mounted on the non-magnetic-permeable distance sleeve, of the rotor by permanent magnets made of permanent magnetic materials in an attached manner; and arranging attached surfaces of the permanent magnets and the fan-shaped iron cores of the rotor properly so that magnetic polarities of the attached surfaces of the permanent magnets and the fan-shaped iron cores are identical correspondingly. The permanent-magnetic rotor has the advantages that the permanent-magnetic rotor is compact in structure, high in interference resistance, stable in work performance and long in service life, flux leakage at axial ends and flux leakage interference of the rotor are low, magnetic efficiency and utilization rate of each permanent magnet are high, and the like.
Owner:LINQUAN AEROSPACE MOTOR CO LTD
Watertight door device
ActiveCN101983895AFully furnishedEasy to usePower-operated mechanismWatertight door arrangementsControl systemEngineering
The invention relates to a watertight door device which is characterized by comprising a door frame, a door plate, a hydraulic power system and a control system. The door frame is connected with the door plate by a hinge, linkage of a closed / open hydro-cylinder and a locked / loosened hydro-cylinder is employed to automatically perform the motions of closing-locking and delocking-opening; the control system is composed of a plurality of regional control cabinets and a centralized-control box, and can carry out centralized monitoring on the state of the watertight door device and remotely or locally control opening and closing. Compared with the traditional manual type watertight door, the watertight door device provided by the invention not only reduces heavy physical strength dissipation, but also is stable and simple in operation and high in safety and reliability. Meanwhile, compared with the traditional hydraulic sliding type watertight door, the watertight door device is compact instructure, light in weight and small in occupied space.
Owner:CHINA NAT OFFSHORE OIL CORP +1
Telescope rack control system
ActiveCN103838257AAvoid failureImprove scalabilityControl using feedbackKinematic controllerTorque motor
The invention discloses a telescope rack control system. The signal input end of a motion controller is connected with an azimuth axis encoder and a pitch axis encoder, the signal output end of the motion controller is connected with an azimuth axis actuator and a pitch axis actuator in a controlled mode, and the azimuth axis actuator and the pitch axis actuator are connected with an azimuth axis torque motor and a pitch axis torque motor in a control mode respectively; a single chip microcomputer control system comprises a single chip microcomputer, the signal input end of the single chip microcomputer is connected with a pitch axis speed measuring motor, an azimuth axis speed measuring motor, a pitch axis limit switch, an azimuth axis limit switch and a position sensor, the signal output end of the single chip microcomputer is connected with an azimuth axis actuator power source, a pitch axis actuator power source, an azimuth axis power-off brake, a pitch axis power-off brake and a stepping motor actuator, and the stepping motor actuator is connected with a stepping motor; a computer is connected with the motion controller and the single chip microcomputer in a controlled mode. It can be effectively prevented that an azimuth axis and a pitch axis exceed a motion range to cause faults, and safe operation of a telescope is ensured.
Owner:安徽中科未来技术有限公司
Inductive elevator operating panel
The invention discloses an inductive elevator operating panel, and belongs to the technical field of elevator accessories. The inductive elevator operating panel comprises a detection unit, a control unit and a simulating key panel, wherein the detection unit is mounted on the inner top wall of a cage and is electrically connected with the control unit; the control unit is electrically connected with an elevator running circuit; the simulating key panel is arranged on the inner side wall of the cage; the detection unit is a TOF photoelectric sensor and is used for acquiring a key operating signal on the simulating key panel and transmitting the key operating signal to the control unit; the control unit controls the elevator running circuit to carry out a corresponding operation. The inductive elevator operating panel has the advantages as follows: the TOF photoelectric sensor and the simulating key panel are coordinated to simulate multiple columns of operating areas on the inner side wall of the cage, so that conventional mechanical buttons can be replaced, the problem of aging of mechanical components can be avoided, mounting and debugging of the panel and wiring of the circuit are simplified and the cost is reduced; the inductive elevator operating panel is good in anti-jamming capability, is slightly affected by the environment, and is high in reliability, good in sensitivity and long in service life.
Owner:CEDES CHANGSHU SENSOR COMPANY
Single-crystal 2X2 photo switch
InactiveCN1405603ANot easy to influenceHigh speedElectromagnetic transmissionNon-linear opticsEnvironment effectOptical axis
An optical switch of 2X2 monolithic crystal suitable for optical internet and optical computing fields applies a crystal of long parallel hexahedron in the middle of which set a pair of electrodes along the crystal light shaft to make up a photoelectric modulation region in the middle of the crystal. The photoelectric modulation region from the crystal beam input face to the middle position is the light beam joining region and the light splitting region is from behind the photoelectric modulation region to the crystal optical beam output face, so as to realize three functions of input beam polarizing, deflection and beams joining, output beam polarizing, deflection and bean splitting and photoelectric modulation, integrating basic performance necessary for 2X2 optical switch.
Owner:SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
Mine tunnel water gushing-out advance rescue real-time embedded control device
ActiveCN106020025ANot easy to skewNot prone to vibrationProgramme controlMining devicesSound sourcesWater source
The invention relates to a mine tunnel water gushing-out advance rescue real-time embedded control device, and belongs to the technical field of real-time embedded detection control. The device is composed of device front part, a device middle part and a device rear part. The device front part comprises a device front part spiral bit. The device middle part is composed of a rotary joint, a telescopic rod, a claw part spiral bit, a forward driving claw, an external sound source receiving device, a communication module, a circulating moving plate, an LED light source and a three-dimensional imaging device. The device rear part comprises a cable data wire I, a power supply line I, an air channel, a rescue goods bin and a sound transmit-receive device. The mine tunnel water gushing-out advance rescue real-time embedded control device is capable of entering a rescue point to contact trapped persons in time after a water gushing-out accident of a mine tunnel and before a life channel is available, determining the trapped position and the surrounding environment, and providing bases and guidance for the next search and rescue decision; in addition, the device is internally provided with the rescue goods bin and the air channel, thereby providing the basic water source, food, drugs and fresh air to the trapped persons.
Owner:KUNMING UNIV OF SCI & TECH
Vertical magnetic source wave number apparent resistivity measurement method and device
ActiveCN109917470AThe result is accurateNo distortionElectric/magnetic detectionAcoustic wave reradiationEarth surfaceWavenumber
The present invention discloses a vertical magnetic source wave number apparent resistivity measurement method and device. The method comprises the steps of: laying a vertical magnetic source at the earth's surface and supplying current signals; arranging a measurement point at a position having a distance r from the vertical magnetic source and collecting a tangential electric field and a vertical electric field, and substituting the tangential electric field and the vertical electric field into a following simple cubic equation to calculate parameters x; and calculating the wave number apparent resistivity corresponding to the frequency at the measuring point and the wave number of the electromagnetic field according to the parameters x, and calculating the phase based on the electromagnetic field. The method for analyzing and calculating the wave number of the electromagnetic wave and the corresponding apparent resistivity through the electric field and the magnetic field is suitable for any frequency and any transmit-receive distance, is accurate in result, and has ability on detection of the underground depth electricity structure in a short transmit-receive distance.
Owner:CENT SOUTH UNIV
Aerial photographing type rotor craft control system
InactiveCN103901792AHigh precisionHighly integratedProgramme control in sequence/logic controllersGyroscopeWireless transmission
The invention relates to an aerial photographing type rotor craft control system. According to the technical scheme, an ARM system module (2) is connected with a wireless transmission module (1), a gyro module (3), a barometer module (4), a GPS positioning module (5), an LED module (6) and a motor module (7); the ARM system module (2) is internally provided with control software of the craft control system. The control software and hardware of the craft control system act together, and the aerial photographing type rotor craft control system has the advantages of being good in anti-interference performance, high in bearing ratio, good in stability and high in gyroscopic effect resistance. The aerial photographing type rotor craft control system is suitable for being used for high altitude shooting and low altitude shooting equipment in various industries.
Owner:WUHAN UNIV OF SCI & TECH
Crop canopy gradient rainfall remote collecting instrument
ActiveCN104076409AGuaranteed accuracySmall anti-interference abilityRainfall/precipitation gaugesGraduated cylinderOriginal data
A crop canopy gradient rainfall remote collecting instrument comprises rainfall gauges, a main support, horizontal arm tray supports, trays, a main support locating disk, funnels, sensing trays, metering tipping buckets, a solar cell panel, a solar charging circuit, a lithium cell, a multi-path data collector, a GPRS remote controller and a remote network computer. The four horizontal arm tray supports are bridged on the main support at different heights and in the four directions, the trays are arranged at the tail ends of the horizontal arm tray supports, the rainfall gauges are arranged on the trays, the funnels, the sensing trays and the metering tipping buckets are arranged in the rainfall gauges, the main support is fixed by the main support locating disk, and the solar cell panel and a GPRS remote antenna are arranged on the main support. Due to the fact that the rainfall gauges are arranged on the main support at the different heights and in the different directions, the data accuracy of the crop canopy gradient rainfall remote collecting instrument can be guaranteed. Thus, original data can be provided for flood protection, water supply dispatching and water management of power station water reservoirs.
Owner:NORTHWEST INST OF ECO ENVIRONMENT & RESOURCES CAS
Method of selectively detecting thrombin by phosphorescent probe
InactiveCN108375563AImplement selective detectionSimple methodDisease diagnosisBiological testingMn dopedQuantum dot
The invention discloses a method of selectively detecting thrombin by a phosphorescent probe. The phosphorescent intensity of a system is recovered as Mn doped ZnS phosphorescent quantum dots coated by MPA and a thrombin adapter are mixed with surfaces, far from the quantum dots, of TBA in a quenching system because of relatively high specificity combination between a thrombin adapter (TBA) and thrombin. Related to the phosphorescent quantum dots, the phosphorescent quantum dots are applied more widely in detection as the phosphorescent service life is long, interference of autofluorescence and scattered light can be avoided, the selectivity is high, no deoxidant and inductor are needed to be added during detection and the like. The phosphorescent quantum dots and TBA are not modified, sothat the synthetic steps are simplified to a great extent, and meanwhile, the experimental cost is also lowered. The method is high in accuracy and high in sensitivity, and has a very good applicationprospect in detection of an actual sample.
Owner:TIANJIN NORMAL UNIVERSITY
Disc type brake performance detection method and the device
InactiveCN100526833CEasy to installLittle changeMachine part testingApparatus for force/torque/work measurementProcess systemsInterference resistance
The invention relates to a brake property check method of disc damper brake, and a relative device, wherein the back end of a disc spring of the disc damper brake is arranged with a sensor which signal is output via a lead wire. When the damper brake works, the pressure on the disc spring via the sensor can directly be used to measure the positive pressure on the disc damper brake. A support of the disc damper brake along the axle of the damper brake is arranged with a touch Hall displacement sensor which measuring rod is contacted with the side end of a block base to effectively measure the displacement of brake space. The invention uses a data pickup and process system to measure the idle time and brake decelerate value of the damper brake. The inventive method can confirm the reliability of damper brake in use, with high measurement accuracy, strong interference resistance, small volume, and long service life, more particularly to be used for checking the brake property of disc damper brake. The inventive method has simple and easy operation, high check accuracy, simple structure, easy installment, easy maintenance, and wide application.
Owner:CHINA UNIV OF MINING & TECH
Deepwater semi-submerged drilling platform
ActiveCN101954959BSmall footprintConvenient pre-connection workFloating buildingsDrilling riserBlowout preventer
The invention relates to a deepwater semi-submerged drilling platform, which comprises floating tanks, an upright post, a transverse supporting rod and a main deck, wherein a drilling block is arranged above a moon pool in the middle of the main deck; and a derrick is arranged on the drilling block. The deepwater semi-submerged drilling platform is characterized in that: a half derrick space for pre-connecting a drilling tool is reserved on one side of the derrick; a water isolating pipe, a drilling stem, a blowout preventer and a production tree are arranged on the main deck around the moon pool respectively; and an anchor moored positioning and dynamic positioning combined position system which consists of front and back four groups of anchor gears distributed on the left and right sides of the main deck is adopted, each group of anchor gears are provided with 3 anchor chains, a dynamic positioning system consists of 8 dynamic thrusters capable of rotating 360 degrees at the front and back four corners of the bottom of the two floating tanks. In the deepwater semi-submerged drilling platform, the maximum operation water depth is up to 3,000 meters, the maximum drilling depth is up to 12,000 meters, and the maximum variable load is up to 9,000 tons. The deepwater semi-submerged drilling platform can operate in the South China Sea, Southeast Asian sea area and West Africa sea area with severe sea conditions efficiently and safely.
Owner:CHINA NAT OFFSHORE OIL CORP +1
Single-crystal 2X2 photo switch
InactiveCN1186675CNot easy to influenceHigh speedElectromagnetic transmissionNon-linear opticsBeam polarizationSingle crystal
An optical switch of 2X2 monolithic crystal suitable for optical internet and optical computing fields applies a crystal of long parallel hexahedron in the middle of which set a pair of electrodes along the crystal light shaft to make up a photoelectric modulation region in the middle of the crystal. The photoelectric modulation region from the crystal beam input face to the middle position is the light beam joining region and the light splitting region is from behind the photoelectric modulation region to the crystal optical beam output face, so as to realize three functions of input beam polarizing, deflection and beams joining, output beam polarizing, deflection and bean splitting and photoelectric modulation, integrating basic performance necessary for 2X2 optical switch.
Owner:SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
Monitoring method of ultra-low frequency electromagnetic induction monitoring and early warning of coal-rock dynamic disasters
ActiveCN104088668BReal-time forecast and early warningEfficient forecasting and early warningMining devicesDisaster monitoringElectromagnetic induction
Owner:CHINA UNIV OF MINING & TECH
Ultra-low-speed high-precision positioning control method of frameless torque motor
ActiveCN111130409AHigh positioning accuracyImprove anti-interference abilityElectronic commutation motor controlAC motor controlElectric machineExcitation current
The invention discloses an ultra-low-speed high-precision positioning control method of a frameless torque motor. The method mainly comprises the following steps: 1) adjusting the absolute position ofthe motor to zero; 2) calculating a mechanical angle theta<m> which should be rotated by the motor, an electrical angle theta<e> which should be rotated by the motor, a real-time position theta<1eal>of the motor and a real-time rotating speed omega<r> of the motor; 3) adjusting the angle of the rotor to theta<e>; 4) updating the exciting current i<d> according to the feedback rotating speed x<real> of the encoder and the rotating speed fluctuation requirement; and calculating the difference between the given reference value theta<tar> and the feedback value of the encoder to obtain a reference positioning offset, updating the reference value of the target position, and returning to the step 2 until the reference value of the target position is not updated any more. According to the invention, high torque can be maintained under the working condition of ultra-low-speed operation, and the anti-interference capability is excellent.
Owner:CHONGQING UNIV
Organic silicon Schiff base fluorescent probe and application thereof
InactiveCN110066290AGood light stabilityHigh emission quantum yieldSilicon organic compoundsFluorescence/phosphorescenceQuantum yieldBiocompatibility Testing
The invention provides an organic silicone Schiff base fluorescent probe. The chemical structural formula is shown. The above fluorescent probe can be obtained by reacting aminopropyldisiloxane with 4-diphenylaminobenzaldehyde. The fluorescent probe can be used for detecting Cr6+ in a solution, cells or organisms. The probe has high high emission quantum yield, radiation resistance, corrosion resistance, strong ability to penetrate the cell membrane, excellent biocompatibility, strong anti-interference ability and little influence by environmental changes. The fluorescent probe can be synthesized by 'one-pot method', the synthesis process is simple and easy, the raw materials are cheap and easy to obtain, the preparation cost is low, and the promotion is easy.
Owner:UNIV OF JINAN
Multi-functional serial voltage-stabilizing power supply
InactiveCN101917057BEasy access to electricityEasy wiringBatteries circuit arrangementsElectric powerOvervoltageEngineering
Owner:BEIFANG LIANCHUANG COMM
A high-precision non-contact workpiece inner diameter measuring device and method
InactiveCN103968768BAvoid deformationImprove directionalityUsing optical meansLaser rangingLight reflection
A device and method for measuring the inner diameter of a high-precision non-contact workpiece. The device includes a fixed bracket, a first measuring rod, a first drive mechanism, a first laser ranging sensor and a reflector. The fixed bracket is provided with a sliding track. The first measurement A slider is connected to the upper part of the rod, and the slider is connected to the sliding track, and the first driving mechanism drives the slider to move along the sliding track, so that the bottom of the first measuring rod can enter the inner bore of the workpiece to be measured; the first measuring rod is set The first laser distance measuring sensor, the bottom of the first measuring rod is equipped with a reflector, the first laser distance measuring sensor can emit a measuring laser, and the reflector can reflect the measuring laser to the inner wall of the workpiece to be measured, and reflect the diffusely reflected measuring laser to the first laser distance measuring sensor, and the first laser distance measuring sensor obtains the measurement result of the inner wall of the measured workpiece according to the received light information. The invention is non-contact detection, which avoids the adverse effects of object deformation, interference, work interruption and the like caused by contact.
Owner:SHENYANG LIGONG UNIV
A Telescope Rack Control System
The invention discloses a telescope frame control system. The signal input end of the motion controller is connected with the azimuth axis encoder and the pitch axis encoder, and the signal output end of the motion controller is connected with the azimuth axis driver, the pitch axis driver, and the azimuth axis driver. The pitch axis driver is connected to the torque motor of the azimuth axis and the torque motor of the pitch axis respectively; Position switch, position sensor, the signal output terminal of the microcontroller is connected to the power supply of the azimuth axis driver, the power supply of the pitch axis driver, the azimuth axis power-off brake, the pitch axis power-off brake, the stepper motor driver, the stepper motor driver is connected to the stepper motor, computer control Connect the motion controller and microcontroller. The invention effectively prevents failure caused by the azimuth axis and the pitch axis exceeding the range of motion, and ensures safe operation of the telescope.
Owner:安徽中科未来技术有限公司
Airborne vibration signal processing method for large-bypass-ratio turbofan engine
PendingCN114330432ASmooth waveformStable Spectrum AnalysisSubsonic/sonic/ultrasonic wave measurementCharacter and pattern recognitionLow-pass filterFilter (signal processing)
Owner:XIAN AVIATION COMPUTING TECH RES INST OF AVIATION IND CORP OF CHINA
A kind of organosilicon Schiff base fluorescent probe and its application
InactiveCN110066290BGood light stabilityHigh emission quantum yieldSilicon organic compoundsFluorescence/phosphorescenceFluoProbesQuantum yield
The invention provides an organosilicon Schiff base fluorescent probe, the chemical structural formula of which is: . The above-mentioned fluorescent probe can be obtained by reacting aminopropyldisiloxane and 4-dianilinobenzaldehyde. This fluorescent probe can be used to detect Cr in solution, cells or organisms 6+ . The probe of the present invention has high emission quantum yield, radiation resistance and corrosion resistance, strong ability to penetrate cell membrane, excellent biocompatibility, strong anti-interference ability and little influence by environmental changes. The fluorescent probe of the invention can be synthesized by a "one-pot method", the synthesis process is simple and easy, the raw materials are cheap and easy to obtain, the preparation cost is low, and it is easy to popularize.
Owner:UNIV OF JINAN
Differential capacitive sensor applicable to torque detection
PendingCN107421668AHigh sensitivityOffset zero capacitanceWork measurementTorque measurementConnection typeLinearity
The invention discloses a differential capacitive sensor applicable to torque detection. The differential capacitive sensor at least comprises a torque input disc, a torque output disc, a plurality of trapezoidal beams, moving electrodes of a pair of induction capacitors, static electrodes of a pair of induction capacitors, and a substrate, the moving electrodes of the pair of the induction capacitors are respectively located between an outer ring of the torque input disc and an inner ring of the torque output disc and are fixedly connected with the outer ring of the torque input ring to form an integral body, the static electrodes of the pair of the induction capacitors are respectively located at the same sides of the moving electrodes of the corresponding induction capacitors, certain gaps are reserved between the static electrodes and the moving electrodes of the corresponding capacitors, and the moving electrodes of the induction capacitors and the static electrodes of the induction capacitors form a differential-structure vertical electrode type capacitor. According to the differential capacitive sensor, the sensitivity is good, linear errors are small, the anti-interference capability is good, and the linearity of the sensor is greatly improved; and the differential capacitive sensor is realized by employing conventional mechanical machining, the manufacture is simple, and the differential capacitive sensor is applicable to detection of the torque of joint transfer of a series-connection type robot.
Owner:GUANGXI UNIV
A Method and Device for Measuring Wavenumber Apparent Resistivity of Vertical Magnetic Source
ActiveCN109917470BThe result is accurateNo distortionElectric/magnetic detectionAcoustic wave reradiationEarth surfaceWavenumber
The present invention discloses a vertical magnetic source wave number apparent resistivity measurement method and device. The method comprises the steps of: laying a vertical magnetic source at the earth's surface and supplying current signals; arranging a measurement point at a position having a distance r from the vertical magnetic source and collecting a tangential electric field and a vertical electric field, and substituting the tangential electric field and the vertical electric field into a following simple cubic equation to calculate parameters x; and calculating the wave number apparent resistivity corresponding to the frequency at the measuring point and the wave number of the electromagnetic field according to the parameters x, and calculating the phase based on the electromagnetic field. The method for analyzing and calculating the wave number of the electromagnetic wave and the corresponding apparent resistivity through the electric field and the magnetic field is suitable for any frequency and any transmit-receive distance, is accurate in result, and has ability on detection of the underground depth electricity structure in a short transmit-receive distance.
Owner:CENT SOUTH UNIV
A real-time embedded control device for mine penetration advance rescue
ActiveCN106020025BNot easy to skewNot prone to vibrationProgramme controlMining devicesSound sourcesWater source
The invention relates to a mine tunnel water gushing-out advance rescue real-time embedded control device, and belongs to the technical field of real-time embedded detection control. The device is composed of device front part, a device middle part and a device rear part. The device front part comprises a device front part spiral bit. The device middle part is composed of a rotary joint, a telescopic rod, a claw part spiral bit, a forward driving claw, an external sound source receiving device, a communication module, a circulating moving plate, an LED light source and a three-dimensional imaging device. The device rear part comprises a cable data wire I, a power supply line I, an air channel, a rescue goods bin and a sound transmit-receive device. The mine tunnel water gushing-out advance rescue real-time embedded control device is capable of entering a rescue point to contact trapped persons in time after a water gushing-out accident of a mine tunnel and before a life channel is available, determining the trapped position and the surrounding environment, and providing bases and guidance for the next search and rescue decision; in addition, the device is internally provided with the rescue goods bin and the air channel, thereby providing the basic water source, food, drugs and fresh air to the trapped persons.
Owner:KUNMING UNIV OF SCI & TECH
Low-power consumption portable electrocardiograph monitor and control method thereof
InactiveCN102274020BHigh measurement accuracyHighly integratedDiagnostic recording/measuringSensorsComputer hardwareEcg signal
The invention relates to a low-power consumption portable electrocardiograph monitor and a control method thereof, which belongs to the field of medical appliances. The portable electrocardiograph monitor comprises an electrocardiosignal collection unit, an electrocardiosignal analysis and storage unit and an upper computer. The control method comprises the following steps of: step 1: carrying out digital filtering to collected signals by using a wavelet entropy optimal threshold denoising method; step 2: carrying out rejection of baseline drift to the signals processed by step 1 by using a morphological filtering method; and step 3: carrying out disease classification to the signals processed by step 2 by using a support vector machine algorithm. The invention has the advantage of high integrity, and has the characteristics of portability, compactness and economy.
Owner:NORTHEASTERN UNIV LIAONING
A remote collector of crop canopy gradient rainfall
ActiveCN104076409BGuaranteed accuracySmall anti-interference abilityRainfall/precipitation gaugesGraduated cylinderOriginal data
A crop canopy gradient rainfall remote collecting instrument comprises rainfall gauges, a main support, horizontal arm tray supports, trays, a main support locating disk, funnels, sensing trays, metering tipping buckets, a solar cell panel, a solar charging circuit, a lithium cell, a multi-path data collector, a GPRS remote controller and a remote network computer. The four horizontal arm tray supports are bridged on the main support at different heights and in the four directions, the trays are arranged at the tail ends of the horizontal arm tray supports, the rainfall gauges are arranged on the trays, the funnels, the sensing trays and the metering tipping buckets are arranged in the rainfall gauges, the main support is fixed by the main support locating disk, and the solar cell panel and a GPRS remote antenna are arranged on the main support. Due to the fact that the rainfall gauges are arranged on the main support at the different heights and in the different directions, the data accuracy of the crop canopy gradient rainfall remote collecting instrument can be guaranteed. Thus, original data can be provided for flood protection, water supply dispatching and water management of power station water reservoirs.
Owner:NORTHWEST INST OF ECO ENVIRONMENT & RESOURCES CAS
Drive circuit and method of power converter as well as electric vehicle charging pile
InactiveCN105871195AImprove driving abilityReduce volumePower conversion systemsElectromagnetic interferenceEngineering
The invention discloses a drive circuit and method of a power converter as well as an electric vehicle charging pile. The drive circuit comprises a control unit and a half-bridge drive unit, wherein the control unit is used for generating a drive signal and transmitting the generated drive signal to the half-bridge drive unit through an optical coupler isolation unit, and the half-bridge drive unit drives a switch unit on a corresponding bridge arm to act to control the working state of the power converter. Compared with an existing drive circuit of the power converter of the charging pile, the drive circuit has the advantages that the electromagnetic compatibility level of the charging pile can be increased, on one hand, electromagnetic interference of the circuit to the surroundings is reduced, and on the other hand, the anti-interference capacity of the drive circuit is improved.
Owner:ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY +1
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