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48results about How to "Timely compensation" patented technology
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Double channel magnetic current damp variation device with recombination of mixing mode and flowing mode
InactiveCN1621707ANo compensation will occurNo problemNon-rotating vibration suppressionResilient suspensionsMagnetic currentSemi active
The composite mixed mode and flow mode double-channel magnetic rheologic damper includes work cylinder, piston type magnetic field generator, compensator and sealing unit. The piston type magnetic field generator has two flow channels, including the outer channel without magnetic field and operating in mixed mode and the inner channel inside magnetic field and operating in flow mode. The damper may operate in no outer exciting current state with relatively small damping and in large outer exciting current state with relatively great damping. This kind of double-channel structure makes the magnetic rheologic damper possess greatly lowered damping under the condition of no external magnetic field, has expanded dynamic regulation range and even suitable for the semi-active control of vehicle suspension.
Owner:CHONGQING UNIV
Swash plate double-headed piston compressor
ActiveCN101598121AEntity part size reductionReduce axial sizePositive displacement pump componentsMulti-stage pumpsWear resistantPiston ring
A swash plate double-headed piston compressor comprises a spindle (8), a swash plate (7), a front cylinder body (1) and a back cylinder body (2); a plurality of piston chambers are arranged between the front cylinder body (1) and the back cylinder body (2), each piston chamber is provided with a double-headed hollow piston (5), the swash plate (7) is arranged on the spindle (8); the compressor is characterized in that the double-headed hollow piston (5) is symmetrically provided with two small hemisphere pits, each small hemisphere pit is internally provided with a small hemisphere (6), the swash plate (7) is inserted into the place between the two small hemispheres (6), and the heights of the two small hemispheres (6) plus the thickness of the swash plate (7) are less than the spherical diameter of the small hemisphere (6); the swash plate (7) is provided with an air pressure support ring slot for compensating and bearing load; the double-headed hollow piston (5) is provided with a piston ring (10) for supporting with diameter being less than that of the inner diameter of the piston chamber; a wear-resistant layer is arranged on the panel where the swash plate (7) is contacted with the small hemisphere (6). The invention has the advantages of simple structure, convenient manufacture and installation, long service life and high efficiency.
Owner:NANJING AOTECAR NEW ENERGY TECH
Parallel connection type active power filter
ActiveCN103683290AAccurate calculationGood choiceActive power filteringHarmonic reduction arrangementConnection typeHarmonic
A parallel connection type active power filter comprises a current collecting unit, a voltage collecting unit, an IGBT drive unit, an IGBT switch unit and a grid access unit. The parallel connection type active power filter is further characterized in that a DSP chip, an FPGA chip, a grid access current collecting unit and a system operation state collecting unit are further included, the output of the current collecting unit and the output of the voltage collecting unit are respectively connected with the A / D input end of the DSP chip, the DSP chip is used for instruction current signals opposite to detection harmonic signals of a power grid in direction, the FPGA chip modulates PWM output signals according to the instruction current signals and outputting the PWM output signals to the IGBT drive unit, the IGBT drive unit drives the IGBT switch unit to form harmonic currents (compensation currents), the harmonic currents are injected into the power grid through the grid access unit, the grid access current collecting unit collects compensation current signals output by the grid access unit and outputs the compensation current signals to the FPGA chip, and at least the FPGA chip uses the compensation current signals to modulate the PWM output signals. Compared with the prior art, the parallel connection type active power filter improves the flexibility, the reliability and the safety of application.
Owner:深圳市三和电力科技有限公司
Display device and driving module thereof, voltage control circuit and method
ActiveCN103123779ATimely compensationShow normalyStatic indicating devicesVoltage referenceGenerating unit
The present invention relates to a display device and a driving module thereof, a voltage control circuit and method. The voltage control circuit can control an operation voltage of a grid driver array of the display device, and comprises a grid driving pulse generating unit and a controller. The grid driving pulse generating unit generates a grid driving pulse, receives a scanning signal and a reference voltage outputted by the grid driver array, and controls the length of the grid driving pulse according to the level relation of the scanning signal and the reference voltage. The controller is coupled with the grid driving pulse generating unit to receive a grid driving pulse, and controls the level of the operation voltage according to the length of the grid driving pulse.
Owner:AU OPTRONICS CORP
Stepless compensating device and method
InactiveCN103840475AQuick responseShort reaction timeReactive power adjustment/elimination/compensationReactive power compensationPower qualityReal-time data
The invention discloses a stepless compensating device which mainly comprises a filter, a signal collecting plate, an inversion plate, a control plate and a PWM pulse driving plate. Meanwhile, the invention discloses a stepless compensating method. An FPGA chip is used as a core element, a real-time data collecting technology and a dynamic tracking technology are used for monitoring the electric energy quality of a power distribution system in real time, through a monitoring system, a series of electric energy quality data such as system voltages, frequency, loading currents, THDi, THDu, voltage waveform, current waveform, stepless compensating device output current magnitude and waveform can be checked in real-time, the idle current magnitude output by the device is changed continuously through an inversion circuit, quick and continuous idle power compensating is achieved, through the method, idle currents are compensated timely, and the whole structure has the advantages of being scientific, reasonable, advanced in technology, timely in compensating, high in stability, high in cost performance and the like.
Owner:SHARESUN ELECTRICAL LIMITED BY SHARE
Abnormal service compensation method, apparatus, computer device, and storage medium
InactiveCN108989413ATimely compensationImprove the efficiency of compensation processingTransmissionService provisionCompensation methods
The embodiment of the invention provides an abnormal service compensation method, a device, a computer device and a storage medium. When a service provider fails to process a service request successfully,a service request is saved as a service request to be processed, whether a service provider carries out compensation processing of the service request to be processed is monitored in real time, if the service provider does not compensate for the business request to be processed, the service provider is called to compensate for the service request to be processed, so that the service providercan compensate for the service request to be processed in time, the efficiency of compensating for the service request to be processed by the service provider is improved, the waiting time of the useris reduced, and the user experience is improved.
Owner:深圳市牛鼎丰科技有限公司
Rotating connector
InactiveCN103775768ALarge amount of compensationExtended service lifeAdjustable jointsLubricantNozzle
The invention discloses a rotating connector. The rotating connector comprises a shell (1) and is characterized in that a spring (2), a spring cushion (10), a rubber cushion (3), an O-shaped ring (4) and a seal ring (5) are arranged in the shell (1), a shaft clamp (8) is arranged in a groove of a hollow shaft (9), a bearing (6) is arranged between an inner hole of the shell (1) and the external diameter part of the hollow shaft (9), lubricant oil is injected into the bearing (6) through an oil nozzle II, and an observation hole (12) is used for a worker to observe whether leakage exists or not. A hole check ring (7) is used for performing limiting to connect all components into a whole. The rotating connector has the advantages of being simple in structure, stable in supporting and large in bearing pressure, the resisted pressure is 2.0 MPa, the revolving speed is 0-500 r / min, the rotating connector is suitable for the operation of a pipeline, and media are cooling water, saturated steam, conduction oil, air and the like.
Owner:刘明
Production process for high-precision bearing roller for rail transit
The invention relates to a production process for a high-precision bearing roller for rail transit. The production process comprises the following steps of step 1, cold heading: after drawing steel byutilizing a four-station high-speed cold header, upsetting the drawn steel into a roller blank; 2, heat treatment which is a full-automatic mesh belt furnace heat treatment flow production line; 3, hard grinding 1; 4, hard grinding 2; 5, ball base surface processing; 6, hard grinding 3; 7, superfinishing, in which 8 oilstones are adopted to perform vibration back and forth to process a raceway surface of a roller; 8, eddy current inspection, in which eddy current inspection equipment produced by German IBG is adopted and is installed on a superfinishing machine to realize unfolding of the roller so as to perform 100 percent eddy current inspection which is mainly used for detecting defects on the surface of the roller and cracks of internal tissues of the roller; and 9, packaging. The production process has the advantages that through four-station multi-formation, the forming precision of a product can be guaranteed, a metal flow direction of a material can tend to be reasonable at the same time, and the service life of the product is prolonged.
Owner:JIANGSU LIXING GENERAL STEEL BALL +1
Geometry/thermal error online measuring and compensating system for numerical control machine tool
ActiveCN109623499AEfficient testingImprove machining accuracyProgramme controlThermometer testing/calibrationData acquisitionMachine tool
The invention provides a geometry / thermal error online measuring and compensating system for a numerical control machine tool, and belongs to the technical field of error testing and compensating of the numerical control machine tool. The geometry / thermal error online measuring and compensating system for the numerical control machine tool comprises a hardware platform and measuring and compensating software. The hardware platform comprises a one-way acceleration sensor, a digital IC-type high-precision temperature sensor, a multi-channel temperature data collector and a geometry / thermal errormeasuring and compensating host. The measuring and compensating software operates in the geometry / thermal error measuring and compensating host to achieve geometry / thermal error measuring and compensating of the machine tool and is in communication with an FANUC numerical control system. The system has the advantages that rapid and efficient testing of geometry errors is achieved through the acceleration sensor, an expensive special instrument is not needed, and geometry and thermal errors can be subjected to online real-time compensation at the same time.
Owner:DALIAN UNIV OF TECH
Automatic compensation system for inner supporting axial force of foundation pit structural steel
The invention discloses an automatic compensation system for inner supporting axial force of foundation pit structural steel and aims at providing an automatic compensation system which can automatically compensating for the axial force of a supporting beam in the structural steel in time. The automatic compensation system comprises an axial force pressurizing assembly and an axial force compensation device. The axial force pressurizing assembly comprises a first supporting part, a second supporting part and a limiting stop block, wherein the first supporting part and the second supporting part can be supported open mutually, and the limiting stop block is arranged between the first supporting part and the second supporting part. A stress maintaining part is arranged between the limiting stop block and the first supporting part. The axial force compensation device comprises an automatic bolt screwing device, a hydraulic jack arranged between the first supporting part and the second supporting part, and an insertion piece blanking compensation device arranged above the axial force pressurizing assembly. The insertion piece blanking compensation device comprises a case, a rotary disc rotationally arranged in the case through a horizontal shaft rod, multiple pneumatic clamping fingers arranged on the rotary disc, and an insertion piece mechanism arranged in the case. Each pneumatic clamping finger clamps a stress compensation insertion piece.
Owner:DONGTONG ROCK SOIL SCI & TECH HANGZHOU
Single-phase connection method of ore furnace secondary low-voltage compensation device system
InactiveCN101472360AShort pathReduce lossElectric discharge heatingIncreasing energy efficiencyLow voltageHigh pressure
The invention relates to a single-phase connection method for a secondary low-voltage compensating device and a system of a submerged arc furnace. The submerged arc furnace is an important smelting device in the metallurgical industry, the power consumption is high, an electrical system for the prior submerged arc furnace to conduct smelting mainly comprises a high-voltage power supply network, a transformer of a transformer station, a primary side power supply network of an electric furnace, a high-power electric furnace transformer, a low-voltage and heavy-current short network system, a water cooling cable, an electrode system, a heart and the like, smelting current of the electric furnace causes the phenomena of voltage flicker and current impulse and causes distortion of voltage and current waveform of the smelting system, so that the line loss and the loss of the electric furnace device are increased, and the quality of electric energy is reduced. The invention further comprises a compensating capacitor connected in parallel at two ends of a secondary side short network of an electric furnace, the compensating capacitor is added on a node, the exchange for a capacitor has idle work, the idle work generated by the electric arc does not flow through the short network, the electric furnace transformer and the primary side, the pathway is simple and short, the loss is reduced, and the local compensation is realized. Therefore, the operating reliability of the device can be effectively improved.
Owner:西安瑞驰电力设备有限公司
Marine big shaft-diameter and excellent following-performance mechanical seal device
The invention relates to marine equipment, particularly to the improvement on marine mechanical seal devices, and discloses a marine big shaft-diameter and excellent following-performance mechanical seal device, which includes two sealing rings and sealing ring bases, wherein the two sealing rings are oppositely arranged and form an end surface seal pair, the two sealing ring bases are used for supporting and driving the two sealing rings respectively; in the two sealing ring bases, one elastic seal ring is installed between the at least one sealing ring base and the sealing ring driven and supported by the sealing ring base, the elastic seal ring and the sealing ring are connected through a concavo-convex tongued and grooved structure and radially located; the elastic seal ring and the sealing ring base are connected through a concavo-convex tongued and grooved structure and radially located; and the sealing rings made of high-molecular self-lubricating materials enable the end surface seal pair to have excellent following performance, so as to quickly and timely compensate and improve the sealing effect.
Owner:朱方文
10kV distribution network
InactiveCN108254642AAccurate and complete data supportStrong data foundationElectrical testingSustainable buildingsSignal processing circuitsLow voltage
The invention relates to a 10kV distribution network. The 10kV distribution network has a 10kV low-voltage intelligent distribution network system with a reactive power compensation function. The 10kVdistribution network comprises a terminal part, a computer part, a communication part and a monitoring part. The 10kV distribution network is characterized in that the terminal part comprises a feeder line automation terminal, a distribution transformer detection terminal, a ring main unit and a switching station; the computer part comprises a network workstation, an application server, a front server, a firewall router and a shared printer; the communication part comprises MSTP equipment, an Ethernet switch and EPON; a compensation part is composed of a current transformer, a voltage transformer, a switch power supply, a signal processing circuit, a capacitor switching control apparatus, a photoelectric coupling apparatus, a main control device, a data storage apparatus and an AD conversion circuit; and the data output by the main control device is uploaded to a data bus, and the data is received, stored, analyzed and processed by a distribution management workstation.
Owner:郑龙海
Star connection method of ore furnace secondary low-voltage compensation device system
InactiveCN101472359AShort pathReduce lossElectric discharge heatingIncreasing energy efficiencyElectric arc furnaceLow voltage
The invention relates to a start connection method for a secondary low-voltage compensating device and a system of a submerged arc furnace. The submerged arc furnace is an important smelting device in the metallurgical industry, the power consumption is high, an electrical system for the prior submerged arc furnace to conduct smelting mainly comprises a high-voltage power supply network, a transformer of a transformer station, a primary side power supply network of an electric furnace, a high-power electric furnace transformer, a low-voltage and heavy-current short network system, a water cooling cable, an electrode system, a heart and the like, smelting current of the electric furnace causes the phenomena of voltage flicker and current impulse and causes distortion of voltage and current waveform of the smelting system, so that the line loss and the loss of the electric furnace device are increased, and the quality of electric energy is reduced. The invention further comprises a compensating capacitor connected in parallel at two ends of a secondary side short network of an electric furnace, the compensating capacitor is added on a node, the exchange for a capacitor has idle work, the idle work generated by the electric arc does not flow through the short network, the electric furnace transformer and the primary side, the pathway is simple and short, the loss is reduced, and the local compensation is realized. Therefore, the operating reliability of the device can be effectively improved.
Owner:西安瑞驰电力设备有限公司
Swinging two-way spraying equipment for agricultural planting
ActiveCN110574750AReduce labor intensityStir wellRotary stirring mixersTransportation and packagingAgricultural engineeringEngineering
The invention discloses swinging two-way spraying equipment for agricultural planting. The equipment comprises a bottom plate, a plurality of moving wheels are arranged on one side of the bottom plate, and a pesticide storage barrel is fixedly arranged on the side, away from the moving wheels, of the bottom plate, a stirring device is arranged in the pesticide storage barrel, a water pump is arranged on one side of the bottom of the pesticide storage barrel, one end of the water pump is communicated with the pesticide storage barrel through a communication pipe, the other end of the water pumpis provided with a water outlet pipe, the other end of the water outlet pipe is communicated with a hose, the end, away from the water outlet pipe, of the hose is communicated with the middle of a transverse pie, spray heads are symmetrically arranged at the two ends of the transverse pipe, fixed rods are arranged on the two sides of the transverse pipe respectively, the fixed rods are connectedwith a swinging device, and the swinging device comprises a support plate. The equipment has the advantages that swinging spraying can be achieved, spraying can be conducted at the two sides simultaneously, the work efficiency can be improved, the labor intensity of workers is lowered, stirring and spraying can be conducted simultaneously, and the water and pesticide can be stirred to be uniform.
Owner:杨克伟
Air floating main shaft rotation error detection and compensation device and method based on reflection principle
ActiveCN110948288ARotary motion error real-timeAccurate rotary motion errorUsing optical meansOther manufacturing equipments/toolsLaser transmitterAir bearing
The invention discloses an air floating main shaft rotation error detection and compensation device and method based on a reflection principle. At present, the rotation error of an air bearing is mainly compensated by adopting a weight type or a spring type, and real-time detection and accurate compensation cannot be realized. The air floating main shaft rotation error detection and compensation device comprises air inlet pressure control valves, auxiliary measurement reflection tables, laser emitters, a radial air bearing and measurement sensitive elements; and when a laser emitted by each laser emitter is not reflected at the preset position on the corresponding measurement sensitive element, a controller judges that an air floating main shaft has a rotation motion error, records the number of each measurement sensitive element which does not receive the corresponding laser at the preset position, controls the corresponding air inlet pressure control valve to adjust the air inlet pressure, and further adjusts the air pressure of an air inlet area corresponding to the radial air floating bearing to compensate the motion precision of the air floating main shaft in the correspondingdirection. According to the air floating main shaft rotation error detection and compensation device and method, the optical measurement principle is adopted, and the rotation error of the main shaftcan be detected in real time and in place, so that the detection is more accurate, and the compensation is more accurate.
Owner:HANGZHOU DIANZI UNIV
Method and system for generating and backing up scores of athletic competition
InactiveCN102743853AImprove accuracyImprove effectivenessSport apparatusRedundant operation error correctionReusabilityData science
The invention discloses a method and a system for generating and backing up scores of an athletic competition. The method for generating and backing up the scores of the athletic competition specifically includes that by means of at least two input ends, on-site technical information of each team of the athletic competition is respectively received, and second score information is recorded; whether the increasing amount of first score information is identical to that of the second score information is judged, if the increasing amount of the first score information is identical to that of the second score information, the first score information is output through a score output data end, and otherwise, the second score information is output through the score output data end, so that error data of on-site scores can be timely found and corrected, the accuracy and the effective reusability of the on-site scores are improved, and the acquisition quality of the on-site scores is improved.
Owner:CHINA DIGITAL VIDEO BEIJING
Milling machine tool with blade compensation function
InactiveCN109128314AEasy for rough machiningTimely compensationLarge fixed membersMilling equipment detailsMilling cutterEngineering
The invention discloses a milling machine tool with a blade compensation function. The milling machine tool comprises a support plate and a first support pillar, wherein the middle of the first support pillar is connected with a second support plate through the support plate, a moving assembly is arranged on the support plate, a recovery assembly is arranged below the support plate, the upper endof the first support pillar is connected with the upper end of the second support plate through a top plate, the middle of the lower end of the top plate is connected with a thin milling assembly, anda thick milling assembly is arranged on one side of the thin milling assembly. The problems that multi-surface milling cannot be realized, material scraps remain easily in coolants for processing andcan block channels through which the coolants flow and the like can be solved, thick milling cutters or thin milling cutters rotate at high speed to perform milling, a first telescopic cylinder or asecond telescopic cylinder telescopes axially through a telescopic rod, the thick milling cutters or thin milling cutters and milled materials are timely compensated, and the milling machine tool hasthe effects of being simple in structure, environmentally friendly and capable of recycling coolants, prolonging service life of the machine tool and realizing multi-surface milling.
Owner:安徽省临泉县智创精机有限公司
Corner connection method of ore furnace secondary low-voltage compensation device system
InactiveCN101472358AShort pathReduce lossElectric discharge heatingIncreasing energy efficiencyElectric arc furnaceLow voltage
The invention relates to an angle connection method for a secondary low-voltage compensating device and a system of a submerged arc furnace. The submerged arc furnace is important smelting equipment in the metallurgical industry, the power consumption is high, an electrical system for the prior submerged arc furnace to conduct smelting mainly comprises a high-voltage power supply network, a transformer of a transformer station, a primary side power supply network of an electric furnace, a high-power electric furnace transformer, a low-voltage and heavy-current short network system, a water cooling cable, an electrode system, a heart and the like, smelting current of the electric furnace causes the phenomena of voltage flicker and current impulse and causes distortion of voltage and current waveform of the smelting system, so that the line loss and the loss of the electric furnace device are increased, and the quality of electric energy is reduced. The invention further comprises a compensating capacitor connected in parallel at two ends of a secondary side short network of an electric furnace, the compensating capacitor is added to a node, the exchange for a capacitor has idle work, the idle work generated by the electric arc does not flow through the short network, the electric furnace transformer and the primary side, the pathway is simple and short, the loss is reduced, and the local compensation is realized. Therefore, the operating reliability of the device can be effectively improved.
Owner:西安瑞驰电力设备有限公司
Anti-uplift retreating deep hole grouting system and method for crossing existing shield tunnels
Owner:CHINA RAILWAY 19TH BUREAU GRP RAIL TRANSIT ENG
Gap compensation clutch retainer ring mechanism of hydraulic brake
InactiveCN104121310ANot easy to fall offEnough brake pressureSlack adjustersEngineeringCylinder block
Provided is a gap compensation clutch retainer ring mechanism of a hydraulic brake. A meshing groove is formed in one end of a cylinder body, plunger pistons are installed in the meshing groove and the inner cavity of the cylinder body, one end of each plunger piston is connected with a right bake shoe through the meshing groove, the other end of each plunger piston is connected with a clutch, and a connecting plate is arranged at the left end of the clutch. One end of a shoe web plate is connected with the clutch through the connecting plate, the other end of the shoe web plate is connected with a left brake shoe, a semi-S-shaped retainer ring is arranged on the connecting plate and fixed on the connecting plate through a retainer and a positioning bolt, a dual-fixing plate is arranged on the cylinder body and fixed on the cylinder body through a stud.
Owner:XUZHOU CONTENT TRANSMISSION TECH
Full-automatic alternating current voltage compensator
InactiveCN101403933AReduce lossExtended service lifeConversion without intermediate conversion to dcElectric variable regulationMicrocontrollerAutomatic control
The invention relates to the field of electrical power appliance power supply, in particular to a full automatic alternating voltage compensator, and solves the problem that the voltage is not compensated timely and reliably as the existing alternating voltage compensator is controlled only by manpower manual operation. The full automatic alternating voltage compensator comprises a voltage compensation device and a control circuit of the voltage compensation device; wherein, the control circuit of the voltage compensation device comprises an automatic control unit and a control transformer which supplies power to the automatic control unit; the automatic control unit comprises a microcontroller, a membrane keyboard and a liquid crystal display (LCD) with raster graphics which are connected with the input / output port of the microprocessor, a midget relay which controls a contactor to gain power or not by contacts, and a micro pressure transformer; the driving chip of the midget relay is connected with the output port of the microcontroller by a photoelectric isolating chip; the secondary output port of the micro pressure transformer is connected with the input port of the microcontroller. The full automatic alternating voltage compensator of the invention has the advantage of reasonable and compact structure and can automatically control the compensation voltage; besides, the compensation is timely, accurate, and the operation reliability is high.
Owner:山西顺泰电器制造有限公司
Method for multi-position optimal estimation detection of key parameters of incomplete-freedom degree inertial platform
The invention relates to a method for multi-position optimal estimation detection of key parameters of an incomplete-freedom degree inertial platform. The method realizes on-line self-detection of an incomplete-freedom degree inertial platform, is suitable for self-detection of various types of incomplete and complete freedom degree inertial platforms and belongs to the field of on-line self-detection of parameters. A basic principle of the method comprises that under preconditions of no use of other applied equipment and no disassembling of a platform system, through outputs of an accelerometer and a gyroscope at the time when the gesture of the platform system changes, the combination with output models of the accelerometer and the gyroscope, and utilization of an extended Kalman filter method, key parameters of the platform system are detected in real time. The method realizes real-time self-detection and feedback of key parameters of a platform system, is conducive to timely compensation of a platform system and improves work precision and stability of a platform system. The method realizes real-time self-detection and feedback of key parameters of a platform system, also realizes real-time estimation of an error angle of the platform system, and improves calculation precision of other parameters.
Owner:BEIJING INSTITUTE OF TECHNOLOGYGY
On-line Measurement and Compensation System for Geometric/Thermal Errors of CNC Machine Tools
ActiveCN109623499BEfficient testingImprove machining accuracyProgramme controlThermometer testing/calibrationGeometric errorControl engineering
Owner:DALIAN UNIV OF TECH
A 10kv distribution network
InactiveCN108254642BAccurate and complete data supportStrong data foundationElectrical testingSustainable buildingsComputer printingWorkstation
Owner:郑龙海
Air bearing spindle rotation error detection and compensation device and method based on reflection principle
ActiveCN110948288BRotary motion error real-timeAccurate rotary motion errorUsing optical meansOther manufacturing equipments/toolsLaser transmitterAir bearing
The invention discloses an air-floating spindle rotation error detection and compensation device and method based on the principle of reflection. At present, the rotation error of air bearings is mainly compensated by weight type or spring type, which cannot realize real-time detection and accurate compensation. The invention includes an intake pressure control valve, an auxiliary measurement reflection table, a laser emitter, a radial air bearing and a measurement sensitive element; when the laser reflection emitted by the laser emitter is not at a predetermined position on the corresponding measurement sensitive element, the controller Determine the rotary motion error of the air bearing spindle, record the number of each measurement sensitive element that has not received the laser at the predetermined position, and control the corresponding intake pressure control valves to adjust the intake pressure, and then adjust the corresponding intake area of the radial air bearing The gas pressure compensates the motion accuracy of the air bearing spindle in the corresponding direction. The invention adopts the principle of optical measurement, and can realize real-time and on-site detection of the rotation error of the main shaft, with more accurate detection and more accurate compensation.
Owner:HANGZHOU DIANZI UNIV
A facility and method for preventing geomembrane damage caused by subsidence around a water inlet tower
ActiveCN109518728BSolve the problem of tension damageCause damageFoundation testingProtective foundationTransceiverGeomembrane
The invention discloses a facility and method for preventing peripheral settlement of an intake tower from causing geomembrane damage. The facility comprises a grouting device and a settlement amountdetection device. The grouting device comprises a grouting machine, a grouting main pipe and multiple grouting branch pipes. The grouting main pipe is vertically arranged in the intake tower, the topof the grouting main pipe stretches out of the intake tower and is connected with the grouting machine, and the multiple grouting branch pipes are arranged at the bottom of the grouting main pipe in aradial shape. The settlement amount detection device is used for detecting the settlement amount of a reservoir around the intake tower and comprises an ultrasonic transceiver and a reflection plate.By means of the facility and method, the settlement amount detection device monitors differential settlement of a foundation around the intake tower regularly, once it is found that the settlement difference exceeds the allowable value, the grouting device carries out grouting on the settlement area in time, and differential settlement is eliminated; and if it is found that large settlement happens to the foundation again, the settlement area can be subjected to grouting repeatedly, and the problem of pulling destroying caused by too large geomembrane deformation due to foundation differential settlement around the intake tower is thoroughly solved.
Owner:HOHAI UNIV
A power-saving device for dynamically filtering out harmonics
ActiveCN106953325BEliminate harmonicsShock suppressionBus-bar/wiring layoutsSubstation/switching arrangement cooling/ventilationHarmonicPower grid
Owner:ZHEJIANG YONGYUAN XINNENG TECH CO LTD
Energy saving device for dynamically filtering harmonic
ActiveCN106953325AEliminate harmonicsShock suppressionBus-bar/wiring layoutsSubstation/switching arrangement cooling/ventilationHarmonicPower grid
The invention discloses an energy saving device and method for dynamically filtering harmonic. The energy saving device comprises a cabinet body, wherein an installation partition plate is arranged at a middle part of the cabinet body, a support plate is arranged at an upper side of a front surface of the installation partition plate, a wiring device is arranged at one side of the front surface of the support plate, a wiring end of the wiring device is connected with a wire a, the other end of the wire a is connected with an acquisition unit, a bypass control unit is arranged at a lower side of the acquisition unit, a wire c is connected with a lower part of the bypass control unit, the energy saving device is connected with the other end of the wire c, and an integrated control unit is arranged at one side of the acquisition unit and comprises a control chip. By the energy saving device, a harmonic component in a power grid can be timely detected by the detection device, an accurate compensation current is output and injected to the power grid by a feedback system, so that the harmonic in the power grid is eliminated; and meanwhile, the device is provided with the bypass control unit, the switching of bypass / energy saving is controlled by controlling suction of a contactor group, the surge can be effectively suppressed and the voltage is stabilized as well as the harmonic of the power grid is handled.
Owner:ZHEJIANG YONGYUAN XINNENG TECH CO LTD
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