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35results about How to "Consistent working status" patented technology
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Pixel circuit, display panel and driving method of pixel circuit
PendingCN111383596AConsistent working statusFully resetStatic indicating devicesControl signalHemt circuits
An embodiment of the invention discloses a pixel circuit, a display panel and a driving method of the pixel circuit. The pixel circuit comprises a first light-emitting control module and a gate initialization module, wherein the first light-emitting control module comprises a control end, a first end and a second end, a first light-emitting control signal is accessed to the control end of the first light-emitting control module, a first power supply signal is accessed to the first end of the first light-emitting control module, and the second end of the first light-emitting control module is electrically connected with a first electrode of a driving transistor; and the gate initialization module comprises the control end, a first end and a second end, an initialization control signal is accessed to the control end of the grid initialization module, and an initialization voltage signal is accessed to the first end of the grid initialization module. Compared with the prior art, the problem of ghosting is solved, and the display effect of the display panel is improved.
Owner:KUNSHAN GO VISIONOX OPTO ELECTRONICS CO LTD
Device for seamless switching of host and standby of communication management machine and method thereof
ActiveCN101997727AConsistent working statusReduce data volumeError preventionData switching networksCommunication interfaceManagement unit
The invention provides a device for seamless switching of a host and a standby of a communication management machine. The device comprises the host and the standby of the communication management machine. The communication management machine comprises a plurality of physical communication interfaces, a communication media equipment management unit, a message transceiving cache region unit, a downlink communication media protocol processing unit, a real-time database unit and an uplink communication media protocol processing unit. The invention further provides a method for seamless switching of the host and the standby of the communication management machine. By the seamless switching of the host and the standby of the communication management machine, the standby of the communication management machine is under working status of the analog host so as to keep the working status of the host and the standby in the same pace. In addition, the host only sends the information received on the existing uplink or downlink communication media link to the standby, so the data volume is small, realtime transmission can be realized, the purpose of seamless switching of the host and the standby of the communication management machine is achieved, and the invention has the great significance for communication reliability and continuity of the important monitoring occasion system.
Owner:广州智光节能环保有限公司
System and method for achieving wireless power transmission through ferromagnetic resonance
ActiveCN103312051ALow costRealize the function of wireless power transmission in the low frequency bandElectromagnetic wave systemCircuit arrangementsCapacitanceInterference (communication)
The invention discloses a system and a method for achieving wireless power transmission through ferromagnetic resonance. The system for achieving the wireless power transmission through the ferromagnetic resonance comprises a transmitting terminal power frequency alternating current power supply, a transmitting terminal ferromagnetic resonator primary side coil, a transmitting terminal resonance capacitor, a receiving terminal ferromagnetic resonator vice side coil, a receiving terminal resonance capacitor and a receiving terminal load and the transmitting terminal ferromagnetic resonator primary side coil is connected with the receiving terminal ferromagnetic resonator vice side coil in a coupling mode. The method for achieving the wireless power transmission through the ferromagnetic resonance includes that a transmitting terminal and a receiving terminal utilize a non-linear relationship between the ferromagnetic material magnetic field intensity and the magnetic flux density to generate the ferromagnetic resonance or chaotic oscillation, magnetic coupling between the transmitting terminal ferromagnetic resonator primary side coil and the receiving terminal ferromagnetic resonator vice side coil is utilized to achieve resonance synchronization, and accordingly the resonance can be achieved in a whole frequency domain and the wireless power transmission is achieved. According to the system and the method for achieving the wireless power transmission through the ferromagnetic resonance, the interference to communication equipment is discarded in the principle due to consistency of self-oscillation resonance or the chaotic oscillation to achieve an efficient, high power and remote wireless power transmission purpose.
Owner:SOUTH CHINA UNIV OF TECH
High-low-temperature vacuum leak hole calibration device and method
InactiveCN106441731AConsistent working statusAccurate CalibrationMeasurement of fluid loss/gain rateEngineeringMeasurement uncertainty
The invention relates to a high-low-temperature vacuum leak hole calibration device and method, and belongs to the field of measurement. In the device, a standard vacuum leak hole is connected with a calibration room through a first valve; an air exhauster set is connected with the calibration room through a third valve; a calibrated vacuum leak hole is connected with the calibration room through a second valve, and is disposed in a high-low-temperature room; a mass spectrometer is connected with the calibration room; a vacuum gauge is connected with the calibration room; a temperature control board is disposed in the high-low-temperature room, and is connected with a temperature control system outside the high-low-temperature room. The method is implemented through the device, and obtains the leak rate of the calibrated vacuum leak hole. The method and device can achieve the accurate calibration of the leak rate of the vacuum leak hole under different temperature conditions, avoids a problem of bigger measurement uncertainty caused by that a vacuum leak rate is calibrated under a lab temperature condition and a standard flow is provided in different application environments in the prior art, and achieves the calibration of the vacuum leak rate under the actual application temperature of the vacuum leak rate.
Owner:LANZHOU INST OF PHYSICS CHINESE ACADEMY OF SPACE TECH
Tire molding capsule device and preparation method thereof
The invention relates to the field of tire molding, in particular to a tire molding capsule device and a preparation method thereof. The tire molding capsule device comprises a capsule body and a fixed base; the capsule body is arranged on the fixed base, and includes an outer capsule body, a first reverse capsule body and a second reverse capsule body integrally molded through vulcanization; the first reverse capsule body and the second reverse capsule body are respectively connected with the two ends of the outer capsule body, and are reversely folded; when the capsule body is molded through vulcanization, molds are bonded on the outer surfaces of the outer capsule body, the first reverse capsule body and the second reverse capsule body; the inner surfaces of the outer capsule body, the first reverse capsule body and the second reverse capsule body are inflated by 2-10 bar; the vulcanization time is 30-120 min; and the temperature is 120-180 DEG C. The surface levelness of the capsule body can be controlled and guaranteed by dint of the smoothness of a mold cover. The thickness uniformity of the capsule body is mainly influenced by the thickness fluctuation of a semi-finished film under the condition of stable mold cavity size and inflation inner pressure.
Owner:ZHONGCE RUBBER GRP CO LTD
Safe tool replacing method based on tool life application mode
InactiveCN109605101AReduce processing quality risksSafe and reliable tool changeMeasurement/indication equipmentsPositioning apparatusLife valueWork status
The invention discloses a safe tool replacing method based on a tool life application mode, and belongs to the technical field of numerical control machining safety tool replacing. The safe tool replacing method comprises the steps that a safety plane is arranged, when a tool reaches the safety plane, a tool residual life value detection subroutine is called to detect a tool residual life value, and when it is detected that the tool residual life value is less than a set value, current state parameters of the stored tool are recorded through a PLC variable group; then a tool replacing subroutine is called to replace the tool with a new tool; and after the tool is replaced with the new tool, the current state parameters stored in the PLC variable group are read, and the new tool is adjustedto be in a machining state identical with the machining state of the old tool. The safe tool replacing method has the beneficial effects that automatic detection for tool replacing based on the toolresidual life is achieved, the consistency of working states of the tool before and after tool replacing is ensured, the part machining quality risk after tool replacing is lowered, tool replacing issafe and reliable, and tool feeding and retracting are safe and reliable.
Owner:CHENGDU AIRCRAFT INDUSTRY GROUP
Resonance measuring chucking appliance of hard disk drive rack
ActiveCN101408456AThe effect of resonance is smallGuaranteed accuracySubsonic/sonic/ultrasonic wave measurementUsing wave/particle radiation meansHard disc driveResonance
The invention discloses a resonance measuring clamp of a hard-disk drive frame. The resonance measuring clamp comprises a substrate and a portal frame; one surface of the substrate is provided with a prop of the drive frame used for placing the drive frame, magnet props are arranged around the prop of the drive frame, and the ratio between the drive frame prop the magnet prop is higher than the set value; the surface with the prop of the drive frame of the substrate and the surface that is opposite with the surface with the prop of the drive frame are the planes; the mass of the substrate is over 100 times than the mass of the drive frame; the portal frame is vertically fixed on the plane with the prop of the drive frame of the substrate, and a lockout module used for locking the drive frame is arranged right above the prop of the drive frame. The resonance measuring clamp of the invention simulates the situation that the drive frame is used in the real hard-disk using process, thus measuring the resonance characteristic of the product more accurately; meanwhile, the mass of the measuring clamp is far heavier than the mass of the drive frame, so that the influence on the resonance of the drive frame caused by the measuring clamp is little, and the accuracy of the measuring result can be ensured.
Owner:福群科技(东莞)有限公司
MMC control method under unbalanced power grid voltage based on Lyapunov function
ActiveCN108574295AQuick responseImprove robustnessElectric power transfer ac networkPolyphase network asymmetry elimination/reductionMomentumMathematical model
The invention relates to an MMC control method under unbalanced power grid voltage based on a Lyapunov function. The method comprises the following steps: (1) an MMC mathematical model is built; (2) according to the MMC mathematical model, the steady-state value of an MMC switching function is acquired; (3) based on the Lyapunov function, the fluctuation quantity of the MMC switching function is determined; and (4) according to the steady-state value of the MMC switching function and the fluctuation quantity of the MMC switching function, the control value of the MMC switching function is determined, and according to the control value of the switching function, the MMC is controlled to work. Compared with the prior art, the method has the advantages that the response speed is quick, the robustness is strong, the system has a simple structure, the physical meaning is clear, the cost is low, realization is easy and the like.
Owner:SHANGHAI UNIVERSITY OF ELECTRIC POWER
Whole-machine dynamic balancing device and method for micro turbojet engine
InactiveCN111044222AAvoid errorsHigh balance precisionEngine testingStatic/dynamic balance measurementBalancing machineDynamic balance
The invention, which belongs to the field of engineering machinery, relates to a whole-machine dynamic balancing device and method for a micro turbojet engine. Under the condition that all rotor pieces and stator pieces of the micro turbojet engine are assembled together, an engine is fixed to a supporting swing frame of a horizontal dynamic balancing machine through a connecting plate. A pneumatic nozzle is designed to be connected with a pneumatic device arranged on the dynamic balancing machine, then a turbine rotor arranged on the engine is blown to rotate through a pneumatic device and apneumatic nozzle, the engine is blown to rotate at a balanced speed, and then dynamic balance testing and correction are carried out. And after completion, the engine does not need to be disassembled,subsequent final engine assembly can be directly carried out, so that repeated assembly errors after dynamic balance of the traditional combined rotor are avoided, the balance precision is high, andthe production efficiency is high.
Owner:BEIJING POWER MACHINERY INST
Thrust bearing durability test device
ActiveCN111487059AConsistent stateConsistent working statusMachine bearings testingAxial pressureClassical mechanics
The invention discloses a thrust bearing durability test device, and belongs to the technical field of bearing test devices. The device comprises a supporting frame, a sliding column assembly, a pressure applying mechanism, a rotating shaft and a driving mechanism. The sliding column assembly comprises an upper suspension structure connected to the pressure applying mechanism, a sliding column connected to the rotating shaft and a spring arranged on the sliding column in a sleeving mode. A spring tray is arranged on the sliding column; one end of the spring is propped against the upper suspension structure, and the other end of the spring abuts against the spring tray; the thrust bearing is connected between the upper suspension structure and the sliding column; the thrust bearing, the sliding column and the rotating shaft are coaxial; the rotating shaft can be rotatably arranged on the supporting frame; the pressure applying mechanism is configured to apply axial pressure to the thrust bearing in the axial direction of the thrust bearing; and the driving mechanism is configured to drive the rotating shaft to drive the thrust bearing to rotate around the axis of the rotating shaft.Compared with the prior art, the device can make the test state of the thrust bearing to keep consistent with the actual working state, so that the test accuracy of the thrust bearing is improved.
Owner:CHINA FIRST AUTOMOBILE
Energy-saving elevator
InactiveCN109650228ASave electricityEnsure safetyElevatorsBuilding liftsFrequency changerCar driving
The invention discloses an energy-saving elevator. An elevator car and an elevator car drive system are included. The elevator car drive system comprises an MCU control unit and a frequency converter.The energy-saving elevator further comprises a human body detection sensor arranged in the elevator car and an elevator car horizontal height detection sensor arranged on the elevator car. The MCU interior control unit is in control connection with a lighting contactor and a fan contactor in the elevator car for connecting or disconnecting of electric power transmitting from a public power grid to lighting equipment and fan equipment in the elevator car. A contactor at the front end of the frequency converter is connected with the lighting contactor and the fan contactor in the elevator car and used for connecting or disconnecting electric power transmitting from the public power grid to the frequency converter. The contactor at the front end of the frequency converter is set to be conducted when the lighting contactor and the fan contactor in the elevator car are conducted at the same time, and the contactor at the front end of the frequency converter is set to be disconnected when the lighting contactor and the fan contactor in the elevator car are disconnected at the same time. The energy-saving elevator is good in energy saving effect.
Owner:湖南轩之豪信息科技有限公司
Woven bag raw material primary crushing device
InactiveCN108212309ASuitable for useOverall small sizePlastic recyclingGrain treatmentsCold airAssembly line
The invention belongs to the field of wove bag machining, and particularly discloses a woven bag raw material primary crushing device. The woven bag raw material primary crushing device comprises a rack. A pair of reversely-arranged rotating rollers is suspended at the top of the rack in a sliding manner. A spline segment, a sawtooth segment and a thread segment are sequentially arranged on each rotating roller. Nuts cooperating with the thread segments are fixedly connected to the bottom of the rack. Spline sleeves cooperating with the spline segments are rotationally connected to the bottomof the rack, and each spline sleeve is connected with a rotating motor. A cavity is formed in each rotating roller, a piston is in sliding connection in each cavity, a column rod is connected to the end, close to the corresponding spline segment, of each piston, and the other end of each column rod is fixed to the rack. The end, close to the corresponding thread segment, of each cavity communicates with a cold air inflation device, and an air inlet one-way valve is arranged in each cavity. Air outlet holes are formed in the sawtooth segments at intervals, air outlet one-way valves are arrangedin the air outlet holes, and guide covers facing the engagement positions of the sawtooth segments are arranged outside the air outlet holes. According to the scheme, the requirement of carrying outprimary crushing on large woven bag raw materials is met, and the woven bag raw material primary crushing device is most applied to a woven bag machining assembly line.
Owner:重庆市中塑新材料有限公司
A uniform feeding device for oblique shallow sedimentation thickener with half-type slag separator
ActiveCN110052063BMeet the requirementsSimple structureSettling tanks feed/dischargeSlagProcess engineering
The invention belongs to the technical field of mineral processing, and relates to a uniform feeding device for an oblique shallow sedimentation thickener with a half-type slag separator, which includes two or more feeding units, and the pulp of the upper feeding unit passes through two One or more feeding points enter the next-level feeding unit, and the first-level feeding unit connected to the settlement module of the inclined shallow layer thickener sets several feeding points to guide the ore slurry into the inclined shallow layer thickening The designated ore feeding area of the settlement module of the machine, the first-level feeding unit connected to the settlement module of the inclined shallow settlement thickener sets the feeding point according to the number of settlement modules; the first-level feeding of the uniform feeding device The material unit is equipped with a sieve-type slag separator, which is composed of two half-type slag separators. The sieve-type slag separator receives the pulp and enters the uniform feeding device, which is used for pulp energy dissipation and Retain coarse slag or sundries in the pulp. The invention solves the problem of uniform material distribution of the thickener through multi-point feeding.
Owner:KUNMING UNIV OF SCI & TECH
A capsule vulcanization mold and vulcanization method for a tire building bladder
The invention relates to the field of tire building, in particular to a vulcanizing die and a vulcanizing method for a bladder body of a tire building bladder. The vulcanizing die for the bladder body of the tire building bladder is characterized by comprising a first bladder tube, a third bladder tube, an external bladder tube, a bottom cover and an upper cover; an outer ring of the first bladder tube is a first surface; a rotating shaft is arranged in the middle of the first bladder tube in a connecting way; an outer ring of the third bladder tube is a second surface; the bottom cover is fixedly connected with the third bladder tube; a third surface is arranged on an outer ring of the bottom cover; the external bladder tube is arranged on the outer ring; an inner ring of the external bladder tube is a fourth surface; the first surface, the second surface, the third surface and the fourth surface form a die cavity of the bladder body; the external bladder tube and the bottom cover are matched to close the left side end of the die cavity; the right side end of the die cavity is closed by the upper cover; and an inflating channel is radially arranged on the third bladder tube and is connected to the die cavity. By using the bladder body of the vulcanizing die disclosed by the invention, the density of sizing materials is improved, and the bonding strength of the sizing materials and anti-sticking fabric is greatly improved.
Owner:ZHONGCE RUBBER GRP CO LTD
A dynamic test device for radial elastic force of piston ring circumference
ActiveCN113108963BLow costEasy to processApparatus for force/torque/work measurementElasticity measurementPiston ringEngineering
The invention belongs to the technical field of piston ring profile design, and specifically relates to a dynamic test device for radial elastic force of piston ring circumference, which includes a fixed component consisting of a piston and a cylinder, and a force applying component composed of a first spring and a second spring. The components are divided into a static measurement component for the circumferential radial elastic force of the piston ring and a dynamic measurement component for the circumferential radial elastic force of the piston ring. The invention is easy to process and manufacture, the principle is simple, and the cost of each component is low; during detection, the piston ring is installed in the ring groove to ensure the stability of the piston ring during detection; the principle of leverage is used in the measurement process to measure the The pressure value in the piston ring is amplified, which reduces the measurement error caused by the accuracy of the sensor itself. The spherical contact between the pin shaft and the lever can improve the measurement accuracy; the stress state and working state of the piston ring can be guaranteed during the measurement process. Consistent, improve the measurement accuracy; can simultaneously measure the radial elastic value at multiple points when the piston ring is working under dynamic conditions.
Owner:JILIN UNIV
A kind of tire building bladder device and its preparation method
The invention relates to the field of tire molding, in particular to a tire molding capsule device and a preparation method thereof. The tire molding capsule device comprises a capsule body and a fixed base; the capsule body is arranged on the fixed base, and includes an outer capsule body, a first reverse capsule body and a second reverse capsule body integrally molded through vulcanization; the first reverse capsule body and the second reverse capsule body are respectively connected with the two ends of the outer capsule body, and are reversely folded; when the capsule body is molded through vulcanization, molds are bonded on the outer surfaces of the outer capsule body, the first reverse capsule body and the second reverse capsule body; the inner surfaces of the outer capsule body, the first reverse capsule body and the second reverse capsule body are inflated by 2-10 bar; the vulcanization time is 30-120 min; and the temperature is 120-180 DEG C. The surface levelness of the capsule body can be controlled and guaranteed by dint of the smoothness of a mold cover. The thickness uniformity of the capsule body is mainly influenced by the thickness fluctuation of a semi-finished film under the condition of stable mold cavity size and inflation inner pressure.
Owner:ZHONGCE RUBBER GRP CO LTD
A method for measuring capacitance value in high voltage environment
ActiveCN113671262BConsistent working statusAchieve High Voltage IsolationCapacitance measurementsCapacitanceTransformer
The invention provides a method for measuring capacitance value in a high-voltage environment, which belongs to the technical field of capacitance measurement. Firstly, the parameters of the high-voltage environment where the capacitor to be tested is obtained are obtained, and then a high-voltage DC bias unit, a high-frequency transformer unit, and a voltage transformer unit to be tested are constructed. A voltage and current measurement circuit in which the discharge units connected in parallel are connected in series; an adjustable capacitor is connected to the voltage and current measurement circuit as the capacitor to be measured to obtain a reference working curve; after the capacitor to be measured is connected, the discharge unit is disconnected to start the high-voltage DC voltage regulator Power supply to high voltage output, start the high-frequency transformer unit to measure the voltage and current of the primary side, turn off the high-voltage DC stabilized power supply and high-frequency transformer unit, and connect the discharge unit; according to the corresponding voltage and current of the capacitor to be measured in the reference working curve Find the optional capacitance value as the capacitance value of the capacitor under test in a high voltage environment. The invention ensures that the working state of the circuit is consistent when obtaining the reference working curve and measuring the capacitance to be measured, and realizes high-precision capacitance value measurement in a high-voltage environment.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA
Raw material primary crushing device for woven bags
InactiveCN108212309BSuitable for useOverall small sizePlastic recyclingGrain treatmentsStomaCold air
The invention belongs to the field of wove bag machining, and particularly discloses a woven bag raw material primary crushing device. The woven bag raw material primary crushing device comprises a rack. A pair of reversely-arranged rotating rollers is suspended at the top of the rack in a sliding manner. A spline segment, a sawtooth segment and a thread segment are sequentially arranged on each rotating roller. Nuts cooperating with the thread segments are fixedly connected to the bottom of the rack. Spline sleeves cooperating with the spline segments are rotationally connected to the bottomof the rack, and each spline sleeve is connected with a rotating motor. A cavity is formed in each rotating roller, a piston is in sliding connection in each cavity, a column rod is connected to the end, close to the corresponding spline segment, of each piston, and the other end of each column rod is fixed to the rack. The end, close to the corresponding thread segment, of each cavity communicates with a cold air inflation device, and an air inlet one-way valve is arranged in each cavity. Air outlet holes are formed in the sawtooth segments at intervals, air outlet one-way valves are arrangedin the air outlet holes, and guide covers facing the engagement positions of the sawtooth segments are arranged outside the air outlet holes. According to the scheme, the requirement of carrying outprimary crushing on large woven bag raw materials is met, and the woven bag raw material primary crushing device is most applied to a woven bag machining assembly line.
Owner:重庆市中塑新材料有限公司
Electric control flat-tyre hedging system
ActiveCN107599757AEnsure balanceIncrease braking powerTyre measurementsSteering wheelWheel speed sensor
The invention relates to an electric control flat-tyre hedging system. The electric control flat-tyre hedging system comprises a deflation valve installed on a tyre, a linear motor for controlling thedeflation valve, and a motor control system for controlling the linear motor. The motor control system comprises an electric control unit, a tyre pressure detection system, a wheel speed sensor and asteering wheel angle sensor. When the electric control unit receives an abnormal signal of the tyre pressure detection system, whether to send a working command to the linear motor or not is judged by referring to the real-time wheel speed signal and the steering wheel angle signal sent by the wheel speed sensor and the steering wheel angle sensor, and accordingly the deflation valve is controlled to be opened or closed. The electric control flat-tyre hedging system is provided on the basis of the mechanism that a vehicle losses control after having a flat tyre. Through the design that the pressure of the tyre on the corresponding side is rapidly reduced to be zero and accordingly wheels on both sides are the same in rolling radius and condition of contact with the ground, the running balance performance of the vehicle is ensured, and in addition, because the wheels on both sides are in the state of making contact with the ground in a non-pressure mode, the braking capacity can be greatly improved.
Owner:HUZHOU VOCATIONAL TECH COLLEGE
A Two-way Rotating Involute Tooth Profile Internal Gear Pump
ActiveCN113236554BAccurate implementation of bi-directional rotationTwo-way rotation implementationRotary piston pumpsRotary piston liquid enginesGear pumpGear wheel
Owner:NAVAL UNIV OF ENG PLA
Calibration device and calibration method for laser displacement measurement system
The invention discloses a calibration device and method for a laser displacement measurement system, and the device and method are used for carrying out on-site calibration on the laser displacement measurement system on a high-precision rigidity measurement instrument, and belong to the field of measurement and test standards. According to the invention, a gauge block is reliably positioned and conveniently placed on the three beads through a workbench tool and a three-bead measuring mechanism with magnetism, so that the problem that the measurement precision is influenced by the gas film generated between the gauge block and the three-bead measuring mechanism due to installation, repeated positioning of the gauge block and the like is solved, and the field calibration of the laser displacement measurement system is realized.
Owner:JINCHENG NANJING ELECTROMECHANICAL HYDRAULIC PRESSURE ENG RES CENT AVIATION IND OF CHINA
Air relief valve for electrically controlled tire explosion avoiding system
ActiveCN107685597AEnsure balanceIncrease braking powerWith separate inflatable insertsWith multiple inflatable chambersPlastic packagingEngineering
The invention relates to an air relief valve, in particular to an air relief valve for an electrically controlled tire explosion avoiding system. The air relief valve comprises a valve body and a valve core, wherein the valve body is used for fixing the air relief valve onto a tire, and facilitates the arrangement of the valve core at the same time; the valve body is provided with a notch; the valve core has a hollow structure provided with an exhaust channel, and the valve body rotatably sleeves the valve core; a valve core body is provided with a damage piece at the position relative to thenotch; the air relief valve also comprises a thermal sealing plastic packaging cover; the notch and the damage piece are also sealed together by the thermal sealing plastic packaging cover, so that adamage type sealing structure is formed. Under normal circumstances, the air relief valve realizes good air seal by means of the thermal sealing plastic packaging cover; when deflation is needed, thevalve core of the air relief valve is tried to be rotated, so that the thermal sealing plastic packaging cover is destroyed by using a damage head, and the tire pressure is accordingly reduced rapidly; therefore, the working states of wheels at the left and right sides of a car is enabled to be consistent rapidly, and the control ability is recovered.
Owner:HUZHOU VOCATIONAL TECH COLLEGE
Calibration device and method for laser displacement measurement system
ActiveCN109827506APrecise positioningEasy to placeUsing optical meansMeasurement precisionGauge block
The invention discloses a calibration device and method for a laser displacement measurement system, and the device and method are used for carrying out on-site calibration on the laser displacement measurement system on a high-precision rigidity measurement instrument, and belong to the field of measurement and test standards. According to the invention, a gauge block is reliably positioned and conveniently placed on the three beads through a workbench tool and a three-bead measuring mechanism with magnetism, so that the problem that the measurement precision is influenced by the gas film generated between the gauge block and the three-bead measuring mechanism due to installation, repeated positioning of the gauge block and the like is solved, and the field calibration of the laser displacement measurement system is realized.
Owner:JINCHENG NANJING ELECTROMECHANICAL HYDRAULIC PRESSURE ENG RES CENT AVIATION IND OF CHINA
Capsule body of tire building capsule and preparation method thereof
Owner:ZHONGCE RUBBER GRP CO LTD
MMC control method under unbalanced grid voltage based on Lyapunov function
ActiveCN108574295BQuick responseImprove robustnessElectric power transfer ac networkPolyphase network asymmetry elimination/reductionMathematical modelPower grid
The present invention relates to a kind of MMC control method under the unbalanced grid voltage based on Lyapunov function, and the method comprises the following steps: (1) establishing MMC mathematical model; (2) obtaining MMC switching function steady-state value according to MMC mathematical model; 3) Determine the fluctuation of the MMC switching function based on the Lyapunov function; (4) Determine the control value of the MMC switching function according to the steady state value of the MMC switching function and the fluctuation of the MMC switching function, and control the work of the MMC according to the switching function control value. Compared with the prior art, the invention has the advantages of fast response speed, strong robustness, simple system structure, clear physical meaning, low cost, easy realization and the like.
Owner:SHANGHAI UNIVERSITY OF ELECTRIC POWER
A single-event upset-resistant asynchronous frequency division circuit with self-refresh function
ActiveCN108847842BImproved resistance to single event flip effectsReduce the probability of single event flippingCounting chain asynchronous pulse countersDividing circuitsHemt circuits
The present invention is an asynchronous frequency division circuit with self-refresh function and anti-single event reversal effect, which includes a majority voting circuit and a parallel three-stage counting frequency division module, and the counting frequency division module includes a frequency division number configuration circuit and a counter circuit. The use of redundant structure, majority voting circuit and self-refresh method greatly improves the anti-single event flipping effect of the asynchronous frequency division circuit; the single event flipping event in a single frequency division circuit is suppressed through redundant voting, and the output frequency is output after utilizing the majority voting The signal performs real-time refresh control on the three counting frequency division modules to ensure that the three counting frequency division modules work in the same state, eliminating the accumulation of timing error states caused by the single event flip effect in the counting frequency division module, and greatly reducing the asynchronous frequency division circuit. The single event flip probability improves the reliability of integrated circuits in space application environments.
Owner:XIAN MICROELECTRONICS TECH INST
Unmanned aerial vehicle engine control system and modifying method thereof
The invention provides an unmanned aerial vehicle engine control system and a modifying method thereof. An engine controlled by the unmanned aerial vehicle engine control system is controlled by a control steel cable. The unmanned aerial vehicle engine control system comprises at least one control steel cable, at least one steering engine controller and at least one steering engine, wherein the control steel cables are connected with the engine; a steering engine rocker arm is arranged on each steering engine, is connected with the corresponding control steel cable, and is connected with the engine through the corresponding control steel cable; and each steering engine is further connected with a steering engine controller. The invention further provides a modifying method of the unmannedaerial vehicle engine control system. Controlled variables such as a blade angle, a fuel amount and power of the engine are controlled by the steering engines through the control steel cables under the control of the steering engine controller, and the working state of an unmanned aerial vehicle is the same as the working state of a manned aerial vehicle as much as possible.
Owner:INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
Piston ring circumference radial elastic force dynamic testing device
ActiveCN113108963AEasy to process and manufactureThe principle is simpleApparatus for force/torque/work measurementElasticity measurementEngineeringMeasurement precision
The invention belongs to the technical field of piston ring molded line design, and particularly relates to a piston ring circumference radial elastic force dynamic testing device which comprises a fixing component composed of a piston and an air cylinder, a force application component composed of a first spring and a second spring, and a measuring component divided into a piston ring circumferential radial elastic force static measuring component and a piston ring circumferential radial elastic force dynamic measuring component. The device is easy to machine and manufacture, the principle is simple, and the cost of all parts is low; during detection, the piston ring is installed in the ring groove to ensure the stability of the piston ring during detection. In the measurement process, the lever principle is utilized, the measured pressure value in the piston ring is amplified, measurement errors caused by the precision problem of the sensor are reduced, and the pin shaft and the lever are in spherical contact, so that the measurement precision can be improved; the stress state and the working state of the piston ring can be consistent in the measurement process, and the measurement precision is improved; and radial elastic force values at multiple points when the piston ring works under a dynamic condition can be simultaneously measured.
Owner:JILIN UNIV
Oblique shallow settlement thickener uniform feeding device with half-type residue separators
ActiveCN110052063AMeet the requirementsSimple structureSettling tanks feed/dischargeEngineeringMineral processing
The invention belongs to the technical field of mineral processing and relates to an oblique shallow settlement thickener uniform feeding device with half-type residue separators. The oblique shallowsettlement thickener uniform feeding device comprises two stages of or more feeding units, the ore pulp of the previous stage of feeding unit enters the next stage of feeding units through two or morefeeding points, the feeding unit connected with the settlement module of an oblique shallow settlement thickener is provided with a plurality feeding points used for guiding the ore pulp into the appointed ore feeding area of the settlement module of the oblique shallow settlement thickener, and the feeding points of the feeding unit connected with the settlement module of the oblique shallow settlement thickener are set according to the hole number of the settlement module; one feeding unit of the uniform feeding device is provided with a sieve pore type residue separator formed by combiningtwo half-type residue separators, and the sieve pore type residue separator receives the ore pulp entering the uniform feeding device and is used for dissipating energy and retaining coarse residuesand impurities in the ore pulp. The uniform feeding device can solve the uniform distribution problem of the thickener through multi-point feeding.
Owner:KUNMING UNIV OF SCI & TECH
A qam modulation signal transmission method based on array antenna
InactiveCN107395548BImprove efficiencyImprove confidentialityMultiple carrier systemsQam modulationSoftware engineering
The invention discloses a QAM (quadratic amplitude modulation) modulation signal emission method based on an array antenna, and relates to the technical field of radio communication. The QAM modulation signal emission method based on an array antenna includes the steps: decomposing a QAM modulation signal into a plurality of independent BPSK modulation signals; and amplifying the BPSK modulation signals through a saturation power amplifier and radiating the BPSK modulation signals to the outside through the array antenna at the same time, and generating a QAM modulation signal in the expected direction through space power synthesis, wherein distortion occurs in modulation constellation diagrams in other directions. The QAM modulation signal emission method based on an array antenna can realize efficiency linear emission of the QAM modulation signal, can reduce thermo loss of the emitter, and has a secret communication function.
Owner:INST OF ELECTRONICS ENG CHINA ACAD OF ENG PHYSICS
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