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64results about How to "Adjust the amplitude" patented technology
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Potato and soil separation regulating device for potato lifter
The invention provides a potato and soil separation regulating device for a potato lifter. The potato and soil separation regulating device is characterized in that an installation plate is fixed to a side plate on one side of a rack, the downward stretching end is provided with a circular hole with the axis perpendicular to the advancing direction of the lifter, a vibration regulating device comprises a hydraulic motor, an eccentric wheel, a bearing, a connecting rod, a rocker arm, a shaft, rubber wheel carriers and rubber wheels, the output shaft of the hydraulic motor is inserted into the circular hole below the installation plate from the side, close to the rack, of the installation plate, the stretching-out end, penetrating through the circular hole in the installation plate, of the output shaft of the hydraulic motor is provided with an eccentric wheel, the two ends of the sleeve external circle are fixedly provided with a straight arm and a bent arm respectively, the combinations of the rubber wheel carriers and the rubber wheels are uniformly fixed to the shaft between the two side plates of the rack in the axis direction of the shaft through the V-shaped intersection of two straight plates, and the V-shaped opening faces upwards. Automatic regulation of potato and soil separation amplitude and frequency in the potato harvesting process is achieved, the separation efficiency is improved, the potato injuring rate is decreased, the application range is wide, and the structure is simple.
Owner:山东希成农业机械科技有限公司 +1
Electric power feeding system
InactiveCN101578193AAdjust frequencyAdjust the amplitudeHybrid vehiclesBatteries circuit arrangementsPower inverterEngineering
Provided is an electric power feeding system, which is mounted on a mobile unit (10) for feeding an electric power from a plurality of DC power source devices (1 and 2) to an AC drive device (9) to function as a drive source of the mobile unit (10). The plural DC power source devices are individually connected with corresponding inverters (3 and 4) for converting the DC outputs into alternating currents. Each DC power source device and a corresponding inverter constitute one AC output unit. the AC output unit outputs an AC output to the outside. The connections between each AC output unit and the AC drive device and between the individual AC output units are made by AC wiring lines (7). In case the electric power is fed from the plural DC power source devices to the AC drive device, therefore, it is possible to keep the insulation relatively easily between the power feeding wiring lines and the mobile unit and to connect the DC power source devices conveniently.
Owner:TOYOTA JIDOSHA KK
Artificial stone production system
ActiveCN104385436AWell mixedNot stickyCeramic shaping plantsFeeding arrangmentsAutomatic controlEngineering
The embodiment of the invention discloses an artificial stone production system, comprising a stirring device, a material distributing machine, a vibrating device and a pressurizing device, wherein the stirring device is used for evenly mixing raw materials; the material distributing machine is used for distributing the materials according to artificial stone textures; the vibrating device is used for vibrating the distributed materials; the pressurizing device is used for pressing the vibrated materials to form a green body; the stirring device, the material distributing machine, the vibrating machine and the pressurizing device are sequentially connected with one another through a conveyer. The artificial stone production system is applied to the field of artificial stone production; the productive task can be finished according to presetting; particularly, high-quality and high-fidelity simulation artificial stone can be prepared; automatic control can be achieved; the artificial stone production system has the characteristics of being high in production efficiency and high in product percent of pass.
Owner:贺州市鸿源岗石有限公司
Multiple-stable-state stochastic resonance weak signal detection method based on wavelet and parameter compensation
InactiveCN104408288AAdjust the amplitudeHigh energySpecial data processing applicationsBand-pass filterStochastic resonance
The invention discloses a multiple-stable-state stochastic resonance weak signal detection method based on wavelet and parameter compensation. The method comprises the following steps: implementing parameter compensation on a noise-containing weak signal, and multiplying a signal parameter, a noise parameter and system parameters by a compensation parameter to counteract the influence of a damping term so as to detect a high-frequency weak signal; implementing multiscale wavelet discrete transformation on the compensated signal to obtain multiple signals at different scale frequencies, adjusting the amplitude of the signal at each scale, and implementing reconstruction; implementing multiple-stable-state stochastic resonance treatment on the reconstructed signal so that each frequency section of a to-be-detected signal is enhanced, implementing band-pass filtering resynthesis on the output of each frequency section to obtain an enhanced multi-frequency weak signal, implementing envelope demodulation analysis on the disposed signal, and analyzing an envelope spectrogram to realize the detection on the weak signal. By applying the method, the energy of an output signal can be improved greatly; the multi-frequency weak signal submerged by a strong noise background is favorably extracted; the detection accuracy is high.
Owner:YANSHAN UNIV
Method and apparatus for amplitude adjustment of a stamping bar of a road finisher
InactiveCN103132440AAmplitude changes rapidlyReduce the amplitudeRoads maintainenceVertical vibrationRoad surface
A method and an apparatus for amplitude adjustment of a stamping bar of a road finisher are disclosed. The stamping bar is configured to perform oscillating vertical vibrations with upper and lower dead center by drive elements, where the upper dead center is shifted and a lower dead center is kept constant. The drive elements, work in a direction on the lower dead center, are decoupled from the drive elements, work in a direction on the upper dead center. The upper dead center is adjusted and the lower dead center is kept constant for adjusting the amplitude. Independent claims are included for the following: (1) a device for amplitude adjustment of a stamping bar of a road finisher; and (2) a stamping bar of a road finisher.
Owner:BOMAG
Multi-functional ultrasonic vibration cutting mechanism
InactiveCN104308628ACleverly structuredVersatileMechanical vibrations separationFeeding apparatusTool holderDividing circuits
The invention discloses a multi-functional ultrasonic vibration cutting mechanism comprising an ultrasonic signal source, a transducer, an amplitude amplifier pole, a vibration tool holder and a tool. The ultrasonic signal source is connected with the transducer through an amplifying circuit; a voltage dividing circuit in series connection with a voltage dividing resistor is in parallel connection on the amplifying circuit; a telescopic movement mechanism is disposed between the vibration tool holder and a connection device of a machine tool provided with the ultrasonic vibration cutting mechanism; the telescopic movement mechanism is controlled by a power plant operating independently; movement direction of the telescopic movement mechanism is perpendicular to that of the amplitude amplifier pole. With the design of the voltage dividing circuit, amplitude magnitude of the tool is adjusted, depth of a cutting tool workpiece is changed, and requirements of different cutting depth are met. With the design of the telescopic movement mechanism operating independently, the tool has two cutting movement performance of linear motion and elliptical motion, and needs of different cutting process are met. Furthermore, the multi-functional ultrasonic vibration cutting mechanism is multi-functional, widely used, applicable to different processing requirements and more practical.
Owner:SUZHOU HUACHONG PRECISION MACHINERY
Sewing machine
ActiveCN1831231AEfficient compressionImprove correspondenceCellsProgramme-controlled sewing machinesSewing needleMotion control
PROBLEM TO BE SOLVED: To provide a sewing machine in which the frequency of vertical motion of a presser foot is made more appropriate. SOLUTION: The sewing machine comprises a vertical needle motion means 2 for moving up and down a sewing needle 108, positioning means 76a, 77a which mutually position a workpiece and the sewing needle, a presser foot means 1 which vertically moves a presser foot 29 so that the workpiece held at a cloth hold section 111 does not go up with the sewing needle, a presser foot height adjusting means 34 which adjusts the height of the presser foot. The presser foot height adjusting means has a driving source 42 for adjusting the height of the presser foot and a motion control means 1000 which drives the driving source at each time the presser foot goes up and goes down and adjusts amplitude of vertical motion of the presser foot. COPYRIGHT: (C)2006,JPO&NCIPI
Owner:JUKI CORP
Camellia oleifera fruit picking device
PendingCN108307805AHigh degree of mechanizationEasy to operatePicking devicesRenewable energy machinesCamellia oleiferaControl system
The invention belongs to the technical field of agricultural machinery and particularly relates to a camellia oleifera fruit picking device. The camellia oleifera fruit picking device comprises a mainframe, a motor, a beating mechanism, a transmission mechanism and a control system. The beating mechanism and the main frame are in slide fit along a vertical direction, the motor and the transmission mechanism are fixed to the main frame, an input end of the transmission mechanism is connected with the motor while an output end is connected with a rotating shaft, and the control system is electrically connected with the motor. The camellia oleifera fruit picking device has advantages that the beating mechanism which comprises a beating component, a slider, a slider fixing plate and the rotating shaft is used for picking camellia oleifera fruits; in picking, the beating mechanism is inserted into gaps of camellia oleifera branches and leaves, a power source provides power, and the transmission mechanism transmits power to the rotating shaft and the slider to drive the beating component to move up and down for beating camellia oleifera trees to pick camellia oleifera fruits. The camellia oleifera fruit picking device has advantages of high mechanization degree, simplicity in operation and high picking efficiency.
Owner:ANHUI AGRICULTURAL UNIVERSITY
Limb end stiffness measuring device and measuring method thereof
ActiveCN108387351AAchieve random vibrationIngenious combinationDesign optimisation/simulationSpecial data processing applicationsMeasurement deviceEngineering
The invention discloses a limb end stiffness measuring device and a measuring method for measuring the stiffness of a human upper limb end. The device comprises a force measuring module, a transmission module and a driving module. The driving module comprises a main shaft, a bearing, a gear transmission mechanism and a guide rail connecting plate. The gear transmission mechanism meshes with an outer gear ring of the inner circumference of the bearing, and the guide rail connecting plate is connected with the gear mechanism. The guide rail connecting plate is provided with a guide rail; the transmission module comprises a bracket, a cam mechanism and a transmission connecting plate, and the guide rail connects the driving module and the bracket; the force measuring module comprises a sensorconnecting plate, a force sensor and a handle, and the force sensor is connected to the center shaft of the transmission connecting plate through the sensor connecting plate. Through the measuring device, a small random motion with an amplitude variation range of 2 to 8 mm is realized, the measuring device is suitable for the limb end stiffness experiment under different requirements, the vibration frequency is adjustable, and the adjustment step is simple and easy. The invention also discloses a measuring method of the device.
Owner:HUAZHONG UNIV OF SCI & TECH
Hospital patient monitoring system based on internet of things
PendingCN109044291AGuaranteed growthAchieving Power AmplificationDiagnostic recording/measuringSensorsCapacitanceThe Internet
The invention discloses a hospital patient monitoring system based on the internet of things. The system comprises a signal receiving circuit, a steady-state differential circuit and a constant voltage output circuit; the signal receiving circuit receives a signal of a signal transmission channel input end for a control terminal in the hospital patient monitoring system based on the internet of things, a duplex filter circuit formed by an inductor L1, a capacitor C1, a capacitor C2, a resistor R1, an inductor L2 and a capacitor C3 filters out high-frequency interference and low-frequency interference, the steady-state differential circuit receives a signal receiving circuit output signal, the signal is subjected to fixed pulse width shaping by applying a steady-state circuit formed by a triode Q1, a triode Q2, a capacitor C7 and a capacitor C8, the signal is precisely amplified by applying a differential comparison circuit formed by an operational amplifier AR2, an operational amplifier AR1 and an operational amplifier AR3, and finally the constant voltage output circuit applies a triode constant voltage circuit formed by a triode Q5 and a voltage-regulator tube D3 to stabilize voltage and then output the voltage. The signal can be automatically calibrated, and signal distortion is prevented.
Owner:许少辉
Impedance test system and method for three-phase alternating current circuit
ActiveCN109507482ANovel and reasonable designSimple structureResistance/reactance/impedenceEngineeringThree-phase
The invention discloses an impedance test system and method for a three-phase alternating current circuit. The system comprises a disturbing signal injection module, a signal processing module, a signal amplification module, a signal detection module, a frequency responding measuring module and an impedance calculation module; the method comprises the steps that step one, a disturbing signal is generated; step two, the disturbing signal in a dp coordinate system is converted into an abc three-phase alternating current signal; step three, the disturbing signal is amplified and injected into thethree-phase alternating current circuit; step four, the signal detecting module measures a voltage signal of a power supply and a port responding signal and conducts smoothing adjusting on the signals; step five, the port responding signal is transformed to the dq coordinate system from an abc coordinate system; step six, frequency responding is obtained; step seven, impedance of the three-phasealternating circuit is obtained through calculation. The design is novel and reasonable, three-phase alternating current impedance can be conveniently and accurately tested, important significance isachieved on analyzing of stability of the three-phase alternating current circuit, the practicability is high, and the popularization and application value is high.
Owner:NORTHWESTERN POLYTECHNICAL UNIV
Compaction device for compacting moulded bodies from granular substances and method thereof
InactiveCN1478010AEliminate or reduce shortcomingsQuality improvementCeramic shaping apparatusMechanical vibrations separationResonanceClassical mechanics
Owner:吉迪布工程局和革新指导处有限责任公司
Amplitude and frequency regulating device and road roller
ActiveCN106381800AAdjust the amplitudeMeet the compaction construction requirementsRoads maintainenceDrive shaftGear wheel
Owner:SHANTUI CONSTR MASCH CO LTD
In-vitro calculus removing equipment
InactiveCN104055556AImprove stone removal abilityAdjust in timeSurgeryMathematical CalculusDisplay device
The invention provides in-vitro calculus removing equipment which comprises a vibration bed and a control device outside the vibration bed, wherein the vibration bed comprises a main vibrator located above a bed body and connected with the bed body via an adjustable mechanical arm and an auxiliary vibrator raised from the upper surface of the bed body; and the control device is used for controlling vibration of the main vibrator and the auxiliary vibrator and movement of the bed body. The control device is separated from the vibration bed, and a display is arranged on the control device. Therefore, medical personnel can timely adjust the vibration bed, the main vibrator and the auxiliary vibrator according to a calculus condition displayed by the display, and the operation efficiency is greatly improved.
Owner:ZHENGZHOU KANGBAIJIA TECH CO LTD
Bridge construction monitoring system based on Internet of Things
ActiveCN111294305APlay the role of screening peak signalPlay the role of phase shiftPhase-modulated carrier systemsCapacitanceInternet of Things
The invention discloses a bridge construction monitoring system based on the Internet of Things. The system comprises a signal sampling module and a phase-shifting comparison module, the signal sampling module samples node signals in a bridge construction monitoring system by using a signal sampler J1 of which the model is DAM-3056AH; the phase-shifting comparison module receives signals output bythe signal sampling module in two paths; an operational amplifier AR2, a diode D4 and a diode D5 are used for forming a peak detection circuit for screening peak signals in one path of signals; a phase shift circuit composed of an operational amplifier AR4, a resistor R4 and a capacitor C3 is used for carrying out phase shift on the two paths of signals to eliminate signal peaks. An operational amplifier AR3 is used for comparing the two paths of signals; and finally, an operational amplifier AR6, a capacitor C1 and a capacitor C2 are used to form a noise reduction circuit to perform noise reduction adjustment on the signal. The output signal of the operational amplifier AR6 is sent to a bridge construction monitoring system terminal through the signal emitter E1, and a node signal in thebridge construction monitoring system can be sampled and adjusted and converted into a correction trigger signal of the bridge construction monitoring system terminal.
Owner:SHANDONG TIANXIN BIOTECH CO LTD
Heat exchange device based on vibration enhanced heat exchange and heat exchange device set
ActiveCN110470166AImprove heat transfer effectAchieve the purpose of exchangeHeat transfer modificationMaterial consumptionEngineering
The invention relates to a heat exchange device based on vibration enhanced heat exchange. The heat exchange device comprises a box body and a pipeline, a cold water pipe inlet end is arranged at thebottom of the box body, a cold water pipe outlet end is arranged at the top of the box body, a hot water pipe inlet end is arranged at the upper part of the right side wall of the box body, a hot water pipe outlet end is arranged at the lower part of the right side wall of the box body, a floating mass block is connected to the left wall surface in the box body through springs, a fixing block is arranged at the center of the inner right wall surface in the box body, slideways with dovetail grooves are symmetrically arranged on the inner front wall surface and the rear wall surface of the box body, displacement constraint blocks matched with the slideways are arranged in the slideways, the pipeline extends from the hot water inlet end into the box body from top to bottom in an S shape by atleast four layers to penetrate out of the hot water outlet end, a bent section at the left end of the pipeline is connected to the floating mass block, a bent section at the right end of the pipelineis connected to the fixing block, a plurality of resonators sleeve the whole pipeline at intervals, and the displacement constraint blocks sleeve the first layer of pipeline. According to the heat exchange device, the heat exchange efficiency is improved on the premise that the heat exchange area is not increased, the material consumption is reduced, the structure is compact, the installation isconvenient, and the heat exchange device is suitable for the aspects such as rapid cooling and waste heat recovery.
Owner:JIANGSU UNIV OF SCI & TECH
Amplitude adjustment method and sound production device
ActiveCN109270352AImpedance adjustmentAdjust the amplitudeResistance/reactance/impedenceEngineeringSound production
The embodiment of the invention provides an amplitude adjustment method and a sound production device. The sound production device comprises a horn and a digital signal processor, wherein the horn comprises a detection device. The method is characterized by comprising the steps of detecting a current and a voltage of the detection device in real time by the digital signal processor, and calculating a resistance value of the detection device according to the current and the voltage; comparing the resistance value with a preset resistance value to obtain a comparison result; and adjusting a current output value and a voltage output value of the horn according to the comparison result. By the method, the resistance value of the detection device can be detected in real time; and by comparing the resistance value of the detection device with the preset resistance value and adjusting the current output value and the voltage output value of the horn, the amplitude of the horn is controlled not to exceed maximum amplitude, so that noise is prevented.
Owner:VIVO MOBILE COMM CO LTD
Integrally manufactured nonlinear cascaded multi-degree-of-freedom vibration energy collector
ActiveCN111245294AAchieve independent regulationAdjust the amplitudePiezoelectric/electrostriction/magnetostriction machinesMagnetic fluxVibration energy harvesting
The invention provides an integrally manufactured nonlinear cascaded multi-degree-of-freedom vibration energy collector which is characterized in that an inner ring permanent magnet mass block is arranged at an inner ring movable platform, and the inner ring movable platform is fixed at the inner edge of an outer ring vibrator through an inner ring nonlinear spring; an outer ring mass block is arranged at an outer ring movable platform, and the outer ring movable platform is fixed at the inner edge of a supporting block through an outer ring non-linear spring; a through hole is formed in the supporting block, and a planar coil is arranged on the lower surface of the support block. The inner ring permanent magnet mass block moves up and down to change the magnetic flux passing through the planar coil, so that the conversion from vibration energy to electric energy is realized. By independently changing the parameters of an inner ring oscillator and an outer ring oscillator, the distancebetween the two nonlinear modes and the bandwidth characteristic of a single nonlinear mode can be adjusted, the working bandwidth of the vibration energy collector can be remarkably increased, and the device is easy to manufacture integrally.
Owner:SHANGHAI JIAO TONG UNIV
Adjustable hippophae rhamnoides branch and fruit clamping and vibrating harvesting device
InactiveCN113615396AGuaranteed adaptabilityEasy to adapt to vibratory harvestingPicking devicesReciprocating motionAgricultural engineering
The invention discloses an adjustable hippophae rhamnoides branch and fruit clamping and vibrating harvesting device, which is characterized by comprising a clamping unit, a vibrating unit, a transmission unit and an adjusting unit, wherein the clamping unit is used for clamping sheared branches, the vibrating unit is used for driving the clamping unit to reciprocate, the transmission unit transmits power of the power unit to the vibrating unit, and the adjusting unit adjusts the vibrating mode; and the clamping unit is driven by the adjustable vibrating unit to make quick-return linear reciprocating motion or ordinary linear reciprocating motion. Aiming at the process of shearing branches and harvesting hippophae rhamnoides fruits, the adjustable hippophae rhamnoides branch and fruit clamping and vibrating harvesting device not only achieves mechanical harvesting of the hippophae rhamnoides fruits, but also has the advantages of being low in fruit damage rate, high in production efficiency, simple in structure and convenient to adjust.
Owner:SHIHEZI UNIVERSITY
Shock mitigation system capable of adjusting amplitude
The invention discloses a shock mitigation system capable of adjusting the amplitude. The shock mitigation system comprises a moving module, the top end of the moving module is connected with a stressmodule, the top end of the stress module is connected with a primary damping module, and the top end of the primary damping module is connected to a secondary damping module. The shock mitigation system is provided with an electrohydraulic push rod and a tension spring, when the electrohydraulic push rod is operated, the electrohydraulic push rod drives the tension spring to extend or stretch out, and meanwhile, the electrohydraulic push rod changes the distance between a buffer plate and the stress module to drive a second inner spring and a second outer spring to be prolonged or shortened;and meanwhile, the electrohydraulic push rod can change the distance from the top end of a second telescopic column to the bottom end of a second sleeve when being operated, so that a first inner spring and a first outer spring are driven to be prolonged or shortened, the anti-vibration ability of the second inner spring, the second outer spring, the first inner spring and the first outer spring is changed, and the purpose of adjusting the amplitude is achieved.
Owner:珠海市广源信科技有限公司
Adjustable flexible vibration test bench
InactiveCN106197921AAdjust the amplitudeAdjust frequencyVibration testingVertical vibrationEngineering
The invention discloses an adjustable flexible vibration test bench, and the test bench comprises a pedestal. The upper surface of the left side of the pedestal is vertically connected with a rotating shaft support seat, and the top of the rotating shaft support seat is provided with a rotating shaft. The rotating shaft support seat is hinged to a rocking arm through the rotating shaft, and the central part of the upper surface of the rocking arm is provided with a first chute. The right side of the upper surface of the rocking arm is provided with a second chute, and the right side of the lower surface of the rocking arm is provided with a third chute. The central part of one end of the rocking arm is provided with a speed sensor. The first chute on the rocking arm cooperates with a horizontal sliding block, so the test bench can adjust the distance from the horizontal sliding block to the rotating shaft conveniently, changes the amplitude side, and employs the rotation of a rotating disc and the elastic force of a first tension spring as the power of the vertical vibration of the rocking arm. The first tension spring is convenient to replace, thereby guaranteeing the vibration intensity and effect, and prolonging the service life. The test bench effectively adjusts the amplitude and frequency of the rocking arm through the combination of a second tension spring and a third tension spring.
Owner:张泓泽
Preparation device and preparation method of carbon quantum dots
InactiveCN109988570AIncrease productionIncrease profitLuminescent compositionsElectrolysisMaterials science
The invention relates to a preparation device and a preparation method of carbon quantum dots. The preparation device comprises an electro-discharge container, absolute ethyl alcohol, two conductive needles and a power supply; the absolute ethyl alcohol is arranged in the electro-discharge container; the two conductive needles are arranged in the absolute ethyl alcohol; and one conductive needle is connected with the power supply, and the other conductive needle is externally grounded. When the conductive needle is electrified by the power supply, plasma is generated between the two conductiveneedles so as to break through the absolute ethyl alcohol to discharge electricity. Carbon quantum dots are prepared while hydrogen is produced through ethanol reforming, the device is simple, the equipment requirement is low, no catalyst is needed in the reaction, and the reaction condition is simple. Besides, absolute ethyl alcohol is electrolyzed through the conductive needles, hydrogen and carbon quantum dots are prepared at the same time, the generated carbon quantum dots can play a role in photocatalysis on electrolysis of the absolute ethyl alcohol, the yield of the hydrogen and the carbon quantum dots is increased, positive feedback is formed, dual purposes are achieved, time cost and financial resources are greatly saved, and the utilization rate of ethyl alcohol and energy is increased.
Owner:HUAZHONG UNIV OF SCI & TECH
Intelligent sofa capable of adjusting vibration resilience
InactiveCN111839068AImprove comfortLower side support is smallSpringsSofasClassical mechanicsStructural engineering
The invention relates to the field of furniture, and especially relates to an intelligent sofa capable of adjusting vibration resilience. The sofa comprises a sofa body, supporting legs are arranged on the lower side of the sofa body, each supporting leg comprises a shell, a damping device and a damping springback device, and the damping device is connected to the sofa body and located above the damping springback device; the damping springback device comprises a rotating jacking rod, a plurality of blades and a plug, the plug is located in the shell, and the blades are rotatably installed atthe lower end of the rotating jacking rod around the horizontal axis and located in the plug. After the damping device performs primary damping on the downward pressure generated when a person sits onthe sofa body, the damping springback device further buffers the downward pressure of the damping device, so that the upward springback amount of the damping device is reduced, and the comfort is improved; and after the blades are separated from the plugs, the blades can incline by a certain angle, downward pressure can be generated on the damping liquid after the blades incline, then the dampingforce of the damping springback device continues to be increased, and comfort is further improved.
Owner:宗建春
Inductive non-metallic ultrasonic emitting system
InactiveCN107478730AAdjustment periodAdjust duty cycleUltrasonic/sonic/infrasonic wave generationPulse generation by active elementsEngineeringHigh pressure
The invention discloses an inductive non-metallic ultrasonic emitting system, belongs to the technical field of non-metallic ultrasonic energy converter driving systems, and aims at providing an ultrasonic probe driving circuit without high-voltage power supply. The parameters of the ultrasonic probe driving circuit are convenient to adjust. The emitting system includes an ultrasonic emitting circuit and a square wave generator adjustable in duty ratio, the square wave generator adjustable in duty ratio includes an integrated chip, a first resistor, a second resistor, a sliding resistor, a first capacitor, a second capacitor, a first diode as a switch element and a second diode. The emitting system does not need to be provided with a direct-current high-voltage power supply, the safety hazard is eliminated, the size of the emitting circuit and the design cost are reduced, and the development cycle is shortened.
Owner:DONGGUAN UNIV OF TECH
Vibratory separation test bed for pedicels of wine grapes
ActiveCN113575119AChange the maximum strokeAdjust the amplitudeAcceleration measurementPicking devicesVitis viniferaStructural engineering
The invention discloses a vibratory separation test bed for pedicels of wine grapes. The vibratory separation test bed comprises a frame, a vibration mechanism, a data collector, a sensor, a fixing ring and an air pump. The vibration mechanism drives grape vines to vibrate, the fixing ring comprises a first semi-ring, a second semi-ring, air bags, a locking mechanism and a sliding part, the first semi-ring and the second semi-ring are each internally provided with one air bag, and the air pump is installed on the frame and inflates the air bags; an arc-shaped groove in a circumferential direction is formed in the outer arc surface of the first semi-ring, the sliding part comprises an arc-shaped plate, a transverse plate and a vertical plate, the two ends of the transverse plate are connected with the arc-shaped plate and the vertical plate respectively, the transverse plate penetrates through the arc-shaped groove, the vertical plate is used for installing the sensor, and the sensor is connected with the data collector. According to the vibratory separation test bed for the pedicels of the wine grapes, the sensor is installed by the fixing ring with the air bags, the sensor can be mounted and dismounted through inflation and deflation of the air bag, operation is convenient, time and labor are saved, the sensor can adapt to the grape vines in any shape, and mechanical damage to the grape vines is avoided.
Owner:NANJING AGRI MECHANIZATION INST MIN OF AGRI
Sound capable of adjusting voice of musical instrument
InactiveCN108289261ASimple device structureGood sound qualitySignal processingFrequency/directions obtaining arrangementsMagnetEngineering
The present invention relates to the technical field of sounds, especially to a sound capable of adjusting voice of a musical instrument. A magnet sleeves a center pole, the center pole is fixedly connected on a lower magnetic conductive piece, an upper magnetic conductive piece is arranged on the magnet, a vibration coil is arranged between the magnet and the center pole, the upper end of the upper magnetic conductive piece is fixedly connected with a connection piece, and a vibration plate is connected with the internal periphery of the connection piece through an elastic piece; the lower magnetic conductive piece is provided with a seal layer, the seal layer, the upper magnetic conductive piece, the center pole and the vibration plate form a sealed cavity; the seal layer is filled withgas, and the seal layer is fixedly connected with a cylinder; the cylinder is connected with a control module of the sound, the control module is connected with a music signal input module, a voice adjustment module and the vibration coil, and the music signal input module inputs music information. The sound is simple in device structure, good in adjustable voice and tone quality and wide in application prospect.
Owner:广州特美声电器有限公司
Generator for simulating partial discharge signals
ActiveCN111736049AAdjust the amplitudeAdjust frequencyTesting dielectric strengthElectrical measurement instrument detailsPhysicsPartial discharge
The invention provides a generator for simulating partial discharge signals. The generator comprises an external phase input, an MCU control loop, a phase signal output port and an analog signal output port, and also comprises a power supply loop, a control key loop, a signal display loop, a boosting loop, an analog partial discharge signal generation loop, an inner synchronous phase loop and an outer synchronous phase loop which are connected with the MCU control loop. The analog partial discharge signal generation loop is connected with the boosting loop, the inner synchronous phase loop, the outer synchronous phase loop and the analog signal output port; the external phase input is connected with the external synchronous phase loop, the phase signal output port is connected with the inner synchronous phase loop and the outer synchronous phase loop, and the power supply loop is connected with the control key loop and the signal display loop. According to the invention, simulated partial discharge signals with positive and negative polarity double-group phase distribution characteristics can be generated, and the amplitude, frequency and phase angle of the simulated partial discharge signals can be changed at will in the positive and negative directions.
Owner:GUANGDONG POWER GRID CO LTD +1
Material surface ultrasonic impact strengthening device and method
ActiveCN114085987AFacilitates impact hardeningAchieve impact strengtheningProcess efficiency improvementEngineeringMechanical engineering
The invention provides a material surface ultrasonic impact strengthening device which comprises a tensile loading module, an ultrasonic loading module, a base and a three-axis sliding table, wherein the two ends of the tensile loading module are fixed to the base, the ultrasonic loading module is connected with the three-axis sliding table and fixed to the base through the three-axis sliding table, and the ultrasonic loading module is positioned above the tensile loading module; and a test piece is fixed on a clamp of the tensile loading module. The invention further provides a material surface ultrasonic impact strengthening method. By adopting the method, the tensile loading module can drive the test piece to rotate, axial pre-tensile stress is applied to the test piece on the basis of a traditional UNSM, the residual compression stress of the test piece is further improved, and the service life of the material is prolonged; and the ultrasonic loading module performs impact strengthening on the surface of the test piece, parameters such as static load, amplitude, impact times and feeding speed can be adjusted, and roughness, hardness and residual compressive stress of the material surface can be changed, so that fatigue performance, mechanical performance and corrosion resistance of the material are improved.
Owner:JILIN UNIV
Amplitude self-adaptive rotating wheel
InactiveCN103394457AAchieving AdaptivenessReduce the amplitudeMechanical vibrations separationEngineeringSelf adaptive
The invention relates to the field of vibration excitation equipment, in particular to an amplitude self-adaptive rotating wheel. The amplitude self-adaptive rotating wheel comprises a rotating disk, an eccentric block, a spring and a pin shaft and is characterized in that the shaft of the eccentric block is fixed on the rotating disk; the center of the shaft of the eccentric block is not coincident with the center of the rotating disk; the hole of the eccentric block is in loose fit with the shaft of the eccentric block; and a pin shaft hole is formed in the rotating disk for fixing the pin shaft. The amplitude self-adaptive rotating wheel has a large adjustable range and a large application range; and the self-adaptive capability to low frequency, low amplitude, high frequency and high amplitude can be achieved.
Owner:CHINA UNIV OF MINING & TECH (BEIJING)
Hydraulic vibration device
InactiveCN110714955AIncreased durabilityHigh strength and durabilityPortable framesFluid-pressure actuator componentsEngineeringCylinder block
The invention discloses a hydraulic vibration device. The hydraulic vibration device comprises a base, wherein a cylinder body is arranged on the left side of the top end of the base; a piston rod isarranged in the middle of the interior of the cylinder body; a piston is arranged in the middle of the piston rod; a lower cavity is formed in the lower end of the piston in the cylinder body; an upper cavity is formed in the upper end of the piston in the cylinder body; a lower cavity communication port and an upper cavity communication port which communicate with the outside are formed in the right sides of the lower cavity and the upper cavity respectively; a guide shaft sleeve is arranged at the upper end of the upper cavity; and an end cover is arranged at the top end of the cylinder bodyaround the piston rod. The hydraulic vibration device is simple in structure, the overall structural performance of the interior of the device is guaranteed by arranging the cylinder body made of high-strength aluminum materials, the aluminum materials have good hardness and structural strength, so that the durability of the cylinder body is higher, and the service life of the device is prolonged. A sealing ring in the piston is arranged, so that the sealing performance of the device is guaranteed, the movement stroke of the piston is more accurate, and the transmission efficiency of the device is higher.
Owner:江苏昇顺机电有限公司
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