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42results about How to "Get over work" patented technology

COTDR (coherent detection based optical time-domain reflectometry) fused long-distance coherent detection brilouin optical time-domain analyzer

The invention discloses a COTDR (coherent detection based optical time-domain reflectometry) fused long-distance coherent detection brilouin optical time-domain analyzer which comprises a narrow-linewidth laser, two couplings, a microwave signal source, an electro-optic modulator, an isolator, a long-distance sensing optical fiber, an optical circulator, a 3 db coupling, a pulse modulator, an Er-doped fiber amplifier, a scrambler, a pulse signal generator, a balancing photoelectric detector, an electrical frequency spectrum analyzer, a data processing module and an acousto-optic modulator. According to the invention, the signal-to-noise ratio of BOTDA (brilouin optical time domain analysis) is improved by using a coherent detection method, a non-local effect of a BOTDA system is reduced in a double-sideband detection mode, and the sensing distance is more than 70 km under the condition of no light amplification such as raman; and according to the invention, the COTDR is fused to a coherent detection based BOTDA system, and the system can run in a breakpoint testing mode, so that the defect that the traditional BOTDA can not run when a sensing fiber has breakpoints and can not carry out positioning on breakpoints is effectively overcome, thereby enhancing the adaptability and practicability of the sensing system.
Owner:NANJING UNIV

Amplitude detection circuit with direct current offset elimination function

ActiveCN102571227AOvercoming the inability to fully integrate on-chipGet over workReceivers monitoringIntermediate frequencySoftware engineering
The invention discloses an amplitude detection circuit with a direct current offset elimination function. The amplitude detection circuit has a differential structure, and consists of a direct current offset elimination circuit, an amplitude limiting amplification circuit, an amplitude detection circuit, a current addition circuit and a filtering circuit, wherein the direct current offset elimination circuit comprises a plurality of direct current offset suppressors with a low-pass filtering function; the amplitude limiting amplification circuit comprises a plurality of amplitude limiting amplifiers; and the amplitude detection circuit comprises a plurality of amplitude detection units. A differential radio frequency signal is amplified to be saturated by a plurality of stages of cascaded amplitude limiting amplifiers, the output of each stage of amplitude limiting amplifier is detected by the amplitude detection units, output detected amplitude values are transmitted to the current addition circuit for addition, and the sum is filtered by the low-pass filtering circuit to obtain output voltage related to the amplitude of the input signal. The circuit can be adapted to the requirements of high monolithic integration level of a radio frequency chip, and is applied to a high-integration level zero-intermediate frequency receiver with the requirement of signal amplitude detection.
Owner:杭州中科微电子有限公司

Shopping mall building air conditioner cooling load prediction method based on GBDT, storage medium and equipment

PendingCN112001439AFlexible handlingSolve the problem of requiring a large amount of data trainingForecastingCharacter and pattern recognitionSimulationEngineering
The invention discloses a shopping mall building air conditioner cooling load prediction method based on GBDT, a storage medium and equipment, and the method comprises: collecting cooling load data, and carrying out the normalization processing to serve as the cooling load energy consumption prediction; establishing a load prediction model based on a gradient lifting decision tree algorithm; inputting the preprocessed data into a prediction model for training, selecting a grid search-cross validation mode, and optimizing the three hyper-parameters with the maximum influence on the performanceof the GBDT model; establishing a final cold load prediction model by completing parameter optimization of the prediction model, and obtaining a predicted cold load curve according to the parameters and the structure of the prediction model; and evaluating the prediction performance of the prediction model, adopting the prediction error for evaluation, enabling the deviation between the true valueand the prediction value to form the prediction error, and completing mall building air conditioner cooling load prediction. The method has good prediction precision, universality and applicability,and is especially suitable for large public buildings with periodically changing cold loads.
Owner:XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY

Manipulator self provided with wafer edge-searching sensor

The invention relates to a manipulator self provided with a wafer edge-searching sensor, which comprises a main arm (100), an edge-searching sensor (1103) and a mandrel assembly (140), wherein the edge-searching sensor (1103) can lift and rotate along with the main arm (100); the main arm (100) adopts a first hollow structure; the mandrel assembly (140) passes through the first hollow structure and is arranged in a state of not rotating relative to the main arm (100) but lifting relative to the main arm (100); the mandrel assembly (140) adopts a hollow shaft to form a second hollow structure, the second hollow structure keeps an extraction state constantly, a tray (1402) supports the back part of the wafer, certain space is kept between the tray and the wafer, the certain space is communicated with the air to generate negative pressure, and thus, the tray (1402) can stabilize and support the wafer when the wafer is taken and fed. The edge-searching sensor and the manipulator are combined into one, the wafer does not rotate and the main arm drives the sensor to rotate at a high speed during the edge searching process, defects brought by rotating the wafer currently can be effectively avoided, and due to the negative pressure structure of the tray supporting the wafer, defects of the existing sucker structure can be overcome effectively.
Owner:芯导精密(北京)设备有限公司

Spatial multidimensional micro-vibration simulator based on six-dimensional parallel mechanism

The invention relates to a spatial multidimensional micro-vibration simulator based on a six-dimensional parallel mechanism, in particular to a parallel mechanism based on the Stewart-Gough platform. The spatial multidimensional micro-vibration simulator comprises an upper platform, a lower platform and six driving legs, wherein the upper platform and the driving legs are connected through spherical hinges; the lower platform and the driving legs are connected through hook joints; the driving legs are composed of components like voice coil motors, leaf springs and stop sleeves, and can output vibration with the maximum amplitude of 3 mm and the maximum frequency of 500 Hz in the axial direction. According to the spatial multidimensional micro-vibration simulator based on the six-dimensional parallel mechanism, provided by the invention, by adjusting expansion and contraction of the six driving legs to control the six-dimensional motion of the upper platform and the load thereof, the simulation of spatial micro-vibration can be completed; the vibration mode output by the simulator is multidimensional random vibration with specific spectrum form, the effective bandwidth is 0.5-100 Hz, and the shock excitation magnitude is 10<-5> g-10<-3>g.
Owner:CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI

Squeezing mechanism for oil press

ActiveCN104385661AOvercome inability to workGet over workPressesDischarge efficiencyDynamic balance
The invention discloses a squeezing mechanism for an oil press. A part of a cylinder part positioned outside a barrel is provided with a stress part; a horizontal adjusting column is arranged on a frame corresponding to the stress part; a spring is arranged on the adjusting column; one end of the spring is pressed against the stress part; the other end of the spring is pressed against an adjusting nut which is in threaded connection with the adjusting column; the aperture of the inner wall of the inner end of the cylinder part is greater than the aperture of the inner wall of the outer end of the cylinder part; the aperture of the part of inner wall between the inner end of the cylinder part and the outer end of the cylinder part is reduced gradually; an outward extending part is arranged at the inner end of the cylinder part; the extending part extends into a squeezing segment; the outer wall of the extending part is matched with the inner wall of the squeezing segment. Dynamic balance to the working situation is realized through the movement of the cylinder part, and the problem of failure in working of the squeezing mechanism or even damage to a motor due to poor oil discharge efficiency occurring in an oil squeezing process and forced increase of the oil discharge efficiency is solved. The squeezing mechanism has high oil discharge efficiency and high squeezing efficiency, and does not damage any machine.
Owner:河北宏润油脂工业有限公司

Bladder irrigation device

PendingCN109224169AOvercoming the inconvenience of controlling the flow rateOvercome the inconvenient measurementCannulasEnemata/irrigatorsUrinary catheterEngineering
The invention relates to a bladder irrigation device. In the bladder irrigation device, a branch pipe 1 of flush bag communication pipe, one end of the two branch pipes of the irrigation bag communication pipe are communicated with one end of the three-lumen urinary tube communication branch pipe, Branch pipe 1 of flush bag communication pipe, At that other end of the branch pipe 2 of the flush bag communication pipe are communicated with each other a flush bag, Branch pipe 1 of flush bag communication pipe, A first flow rate regulator is respectively arranged on the branch pipes 2 of the flushing bag communication pipe, A 3-lumen urinary catheter communicate branch tube is connected with an irrigation drip tube of that 3-lumen urinary catheter, one end of the drainage tube is connected with a drainage tube end of the 3-lumen urinary catheter, the other end of the drainage tube is communicated with a liquid collector, and a drainage tube squeeze device and a second flow rate regulatorare arranged on the drainage tube. The invention has the following beneficial effects: overcoming the defects of inconvenient control of the flow rate of the existing bladder irrigation device, inconvenient metering, easy blockage of the front end of the urinary catheter and the like, which lead to the waste of manpower and time of the nursing staff.
Owner:PEKING UNION MEDICAL COLLEGE HOSPITAL CHINESE ACAD OF MEDICAL SCI

Rapid measurement and analysis method for rock mass structural features of underground engineering

The invention relates to a rapid measurement and analysis method for rock mass structural features of underground engineering. The method comprises the following steps that: step one, a survey area isdetermined based on a survey purpose and the area is divided into a plurality of sub areas by using a large geological structure like a fault as a boundary; step two, a plurality of measuring pointsare divided in the survey area, wherein the measuring points are arranged in the survey area at intervals; step three, according to occurrence characteristics of the joints in the range of the measuring points, dominant joint groups are divided and joint measurement windows are arranged by using the center points of the measuring points as centers based on the trend occurrence characteristics of the dominant joint groups; and step four, the measurement and analysis of the tendency, the inclination angle, the average joint spacing and the average trace length of the joint are carried out basedon the joint measurement windows. Therefore, defects of large field work load, many needed measurement field indexes, and statistic analysis work delay due to the joint information full-sample measurement and statistics of the traditional surveying method are overcome; and the rapid and accurate measurement and analysis of rock mass structure surface of underground space are realized.
Owner:NORTHEASTERN UNIV

Single-groove deep C/Ku dual-band differential mode tracking feed source and design method thereof

ActiveCN107248619ASolve the separation problemSolve the working frequency bandwidthWaveguide hornsReflection lossCoupling
The invention discloses a single-groove deep C/Ku dual-band differential mode tracking feed source, and belongs to the technical field of the communication antenna. The feed source comprises a single-groove structure corrugated horn and a differential model feeder line synthesis network; the single-groove structure corrugated horn is composed of a transition section, a mode conversion section, a frequency conversion section, an angle variable section and a radiation section; the frequency conversion section is a single groove structure form composed of multiple groove periods, the first to the eighth coupling ports are uniformly and orderly formed on the circumference of the corrugated horn corresponding to one groove period at the front part of the angle variable section, the included angle between two adjacent coupling ports is 45 DEG. The single-groove deep C/Ku dual-band differential mode tracking feed source disclosed by the invention can realize the dual-band communication, the dual-band single-pulse tracking and the dual-band share, and has the advantages of being rotational symmetry in directional diagram, low in side lobe level, small in reflection loss, high in gain, and rotational symmetry in differential directional diagram.
Owner:NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP

Ultra wide band fractal antenna

InactiveCN106159435AOvercome the shortcomings of wide and narrowSmall sizeRadiating elements structural formsAntenna earthingsCommunications systemWide band
The invention relates to an ultra wide band fractal antenna. The ultra wide band fractal antenna comprises a substrate prepared by an organic magnetic material, a double-face radiation unit printed on a surface of the substrate, a fractal defected ground floor and a semi-steel coaxial wire connecting the double-face radiation unit and the floor, wherein the semi-steel coaxial wire comprises an inner core and a copper sheet wrapping the inner core, the substrate and the floor are respectively horizontally arranged, the semi-steel coaxial wire is perpendicular to the substrate and the floor, one end of the semi-steel coaxial wire is connected with the double-face radiation unit of the substrate, the other end of the semi-steel coaxial wire penetrates through the floor and is connected with an SMA connector, the defected ground floor comprises 4*4 fractal unit slots which are arranged in a mode, and the fractal unit slots are fractal tree annular structures. The ultra wide band fractal antenna has advantages of wide band, high gain, excellent directional diagram, light weight and easy mounting, because of excellent performance, the ultra wide band fractal antenna is an excellent choice for UBW, PCS, WLAN, RFID, WIMAX and other communication systems.
Owner:NORTH CHINA UNIVERSITY OF TECHNOLOGY

Dangerous point voice broadcasting attention device of power transmission line

The invention discloses a dangerous point voice broadcasting attention device of a power transmission line. The dangerous point voice broadcasting attention device comprises an aluminum alloy box body, an electric power tower and a solar battery unit. A video collection unit, a sound-light alarm unit, a signal processing unit and a wireless transmission unit which are arranged sequentially from top to bottom are disposed in the aluminum alloy box body. The video collection unit, the sound-light alarm unit and the wireless transmission unit are respectively connected with the signal processing unit through a line. The video collection unit is connected with a monitoring camera through a line. A stainless steel sound column and a sound-light alarm whistle are arranged on the electric power tower and are connected with the sound-light alarm unit through a line. The solar battery unit is respectively connected with the video collection unit, the sound-light alarm unit, the signal processing unit and the wireless transmission unit through a line. The dangerous point voice broadcasting attention device has the advantages of being programmable, unattended in operation, high in efficiency, good in safety and the like, and is efficient, flexible, low in cost and comprehensive in function.
Owner:STATE GRID ZHEJIANG ELECTRIC POWER CO LTD SHAOXING POWER SUPPLY CO +1

Liquid mixing device and control algorithm thereof

ActiveCN105327658AGet over workOvercoming problems such as abnormal infusion volumeFlow mixersMixing methodsChemistryCorrosion
The invention relates to the technical field of liquid mixing devices, in particular to a liquid mixing device and a control algorithm thereof. The liquid mixing device is characterized in that a liquid inlet mechanism connected with a liquid inlet of a reaction kettle is arranged and comprises a reagent box, a liquid inlet pipe, a gas inlet pipe and a gas bottle containing gas, a gas inlet is formed in the top of the reagent box, a liquid outlet is formed in the reagent box, the gas bottle or a gas pressure generation device is connected with the gas inlet in the top of the reagent box through the gas inlet pipe, the liquid outlet in the reagent box is connected with the liquid inlet in the reaction kettle through the liquid inlet pipe, a pressure reduction valve, a pressure detection device and an electromagnetic gas inlet valve are arranged on the gas inlet pipe used for connecting the gas bottle or gas pressure generation device with the reagent box, a liquid inlet valve is arranged on the gas inlet pipe used for connecting the reagent box with the reaction kettle, and the liquid inlet valve is connected with a liquid inlet control mechanism. Compared with the prior art, the liquid mixing device has the remarkable advantages of being reasonable in structure, high in efficiency, low in cost, high in reliability and corrosion resistance, and the like.
Owner:青岛威巴克生物技术有限公司

Improved cable lead coating method

ActiveCN110867783AExtend your lifeReducing the technical requirements of lead enamel processApparatus for joining/termination cablesEngineeringElectric cables
The invention provides an improved cable lead coating method. The method comprises the following steps: fixing a lead pre-coating mold at the top end of a cable sheath; injecting a lead coating material in a molten state into the lead pre-coating mold at a constant speed along the port of the lead pre-coating mold; after the lead pre-coating pipe body is cooled, taking down the lead pre-coating mold; carrying out sawing to obtain a plurality of air fork openings; allowing one end of a cable intermediate joint to stretch into a pipe cavity of the lead coating pipe body, and knocking the top endof the lead coating pipe body by using a hammer, so that the top end is clamped with the outer side surface of the other end of the cable intermediate joint; and heating the lead coating pipe body. According to the invention, the defect is overcome that in a traditional cable lead coating method, a worker needs to conduct lead coating on the cable intermediate joint and the cable sheath at the same time, so the requirement for the lead coating process technology of the worker is lowered, the working efficiency of the worker is improved, the lead coating completion quality is further improved,and the service life of the cable intermediate joint is further prolonged.
Owner:GUANGDONG POWER GRID CO LTD +1

Intelligent plant protection cart and working method thereof

The invention discloses an intelligent plant protection cart and a working method thereof. The intelligent plant protection cart comprises a cart body and a pesticide spraying device for spraying pesticides, the cart body is provided with a driving device, the pesticide spraying device is positioned above the driving device and comprises a pesticide storage tank, a booster pump, at least one solenoid valve, at least one group of sprayers and an overflowing valve, the pesticide storage tank is filled with suitable pesticides, the booster pump is connected with the opening end of the pesticide storage tank through the low-pressure end of a pipeline, the input ends of the solenoid valves are connected with the high-pressure end of the booster pump through pipelines, the sprayers are arrangedon vertical rods and connected with the output ends of the solenoid valves through pipelines, the overflowing valve is used for protecting the pipelines and connected with the high-pressure end of thebooster pump, and the booster pump, the solenoid valves and the overflowing valve are connected with a controller, so that cooperative working of devices is controlled. According to the cart, Mecanumwheels are mounted, the cart can comprehensively move in narrow space without rotating the cart body through intelligent control, so that pesticides are automatically sprayed, the cart overcomes theshortcomings that pesticide spraying plant protection operation is implemented in a narrow space such as a greenhouse, and pesticide poisoning risks of a worker caused by close contact between the worker and the pesticide spraying device are avoided when pesticides are sprayed.
Owner:SHANGHAI MARITIME UNIVERSITY

Device for inserting aluminum core vent plates into casting mold of carbon ceramic brake disc

The invention relates to the field of automobile parts, in particular to a device for inserting aluminum core vent plates into a casting mold of a carbon ceramic brake disc. The technical problem is to provide the device for inserting the aluminum core vent plates into the casting mold of the carbon ceramic brake disc. According to the technical scheme, the device for inserting the aluminum core vent plates into the casting mold of the carbon ceramic brake disc comprises a conveying assembly, an inserting and fixing assembly, a power assembly, a support table, a control table, an aluminum core conveying part and a collecting box; the conveying assembly is connected with the support table; and the inserting and fixing assembly is connected with the support table. According to the device for inserting the aluminum core vent plates into the casting mold of the carbon ceramic brake disc, the processing work of simultaneously inserting the multiple aluminum core vent plates into the casting mold can be achieved, the aluminum cores which are not inserted into the casting mold can be automatically removed, manual work can be replaced by multi-unit synchronous treatment, thus, the treatment work efficiency of the aluminum cores can be improved, and operation is easy, safe and reliable.
Owner:丁尧文
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