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34results about How to "Real-time monitoring of stability" patented technology
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Efficient welding method and device for arc-assisted laser thin-walled welding titanium pipe
InactiveCN112496544AReal-time monitoring of stabilityEfficient weldingLaser beam welding apparatusTitaniumLaser beams
The invention relates to an efficient welding method and device for an arc-assisted laser thin-walled welding titanium pipe. By taking a laser as a main heat source and a tungsten inert gas (TIG) arcas an auxiliary heat source, unfilled full penetration linear butt weld welding is implemented on a butt part of a circular thin-walled titanium pipe in the axis direction of the circular thin-walledtitanium pipe formed by curling a flat thin-walled strip-shaped titanium plate or titanium strip. Compared with the prior art, the efficient welding method and device adopt a heat source arrangement method that the preheating TIG is located in front and the laser forming a weld pool is located behind, and adopt relatively small TIG arc current to preheat a welded titanium pipe, so that the laser absorptivity is improved; laser beams with relatively high power act on the preheated titanium pipe and the molten pool is formed, so that the penetration capacity is improved; and with the cooperationof the large laser positive defocusing amount and optimized welding parameters, the laser energy density of the surface of the welded titanium pipe is reduced, splashing at the inner side of the welded titanium pipe in the welding process is eliminated, and the butt gap disturbance generated in the pipe manufacturing process is met.
Owner:SHANGHAI JIAO TONG UNIV +1
Multipoint displacement testing method based on fiber grating sensing technology
The invention relates to a multipoint displacement testing method based on a fiber grating sensing technology. The invention aims to provide a multipoint displacement testing method based on the fibergrating sensing technology, and the method is simple to implement, high in measurement accuracy and capable of realizing on-line monitoring. The technical scheme of the invention is a multipoint displacement testing method based on the fiber grating sensing technology. The testing method is characterized by providing a carrier, an inclinometer, a fiber grating string I and a fiber grating stringII; installing the inclinometer at one end of a carrier to be used as a displacement 0 point; symmetrically arranging the fiber grating string I and the fiber grating string II on two sides of the carrier with respect to a central line of the carrier; measuring the central wavelengths lambda Bi0 and lambda'Bi0 of the fiber grating string I and the fiber grating string as initial values; and acquiring an initial angle theta0 of the inclinometer. The testing method disclosed by the invention is suitable for the technical fields of fiber grating sensing and engineering measurement.
Owner:ZHEJIANG HUADONG ENG SAFETY TECH +1
Centralized network monitoring and management system
InactiveCN107395432AReal-time monitoring reliabilityReal-time monitoring of stabilityData switching networksNetwork managementDependability
The invention relates to a centralized network monitoring and management system comprising a basic resource layer, a network management layer and a service management layer which are sequentially connected. The basic resource layer is used for implementing unified docking with service resources; the network management layer is used for realizing monitoring and management of hardware and software service modules in the network; and the service management layer is used for realizing management of services in the network. Compared with the prior art, the centralized network monitoring and management system has the advantage of real-time and unified monitoring and management on the reliability and stability of the network.
Owner:上海盈联智能化科技股份有限公司
Real-time monitoring method for stability of muddy seabed channel side slope
ActiveCN109342569AReal-time monitoring of stabilityDoes not affect normal operationAnalysing solids using sonic/ultrasonic/infrasonic wavesSlope stabilityAcoustic profile
The invention discloses a real-time monitoring method for stability of a muddy sea channel side slope. The real-time monitoring method comprises steps of: placing a buoy at the edge of the channel; mounting an acoustic profile detection system on the buoy; emitting sound waves to the seabed through the sediment layer of the seabed channel side slope by the acoustic profile detection system; receiving seabed sound waves and converting into a sediment profile acoustic image by a receiving system; transmitting the sediment acoustic image signal to a monitoring center through a transmission system; and monitoring and analyzing the stability of the channel side slope in real-time after the monitoring center processes the transmitted acoustic image. The real-time monitoring method for the stability of the muddy seabed channel side slope provided by the invention does not affect the normal operation of the ship, and realizes real-time monitoring in all weather.
Owner:JIANGSU OCEAN UNIV
power capacity management system and management method based on PDU monitoring
InactiveCN110377137AImprove operation management levelImprove efficiencyHardware monitoringPower supply for data processingIt equipmentData acquisition
The invention provides a power capacity management system and management method based on PDU monitoring, and the system comprises a data collection server which is configured to be used for collectingdata from a plurality of power distribution units; a data storage device which is configured to store the data acquired by the data acquisition server; and a monitoring server which is configured toexecute corresponding monitoring operation according to the data stored in the data storage device. The invention discloses a monitoring management system. An efficient power distribution unit monitoring management system is constructed; the real-time operation power of various IT equipment in the data center can be effectively monitored and counted, the equipment capable of being put on shelves in the data center machine room is calculated based on the actual power of the various IT equipment, the power utilization rate of the machine room is improved while the power utilization safety of themachine room is ensured, and fine management of the power capacity of the data center machine room is achieved.
Owner:广东华保数据有限公司
Method and system for judging reliability of distributed cluster through weighted entropy
ActiveCN107590008AReal-time monitoring of stabilityKeep abreast of environmental changesHardware monitoringError ratioSlide window
The invention relates to a method and a system for judging the reliability of a distributed cluster through a weighted entropy, and belongs to the field of distributed cluster reliability. The methodcomprises the steps of previously performing weighting for log events with different severities; then performing statistics on quantities of different types of system logs of nodes of the cluster in atime period by utilizing a sliding window; calculating error rates of the nodes; according to the error rates, calculating the reliability weighted entropy of the cluster; and finally according to afluctuation range, judging the stability of the cluster. Through the method, system reliability is quantized; the reliability of the whole cluster not only can be quantitatively judged through simpledeployment but also can be monitored in real time to obtain environmental change of the cluster in time; and when the reliability of the cluster has a relatively great fluctuation, corresponding measures can be adopted in time for processing.
Owner:INST OF COMPUTING TECH CHINESE ACAD OF SCI
Energy dissipation-based rock-soil stability monitoring device
InactiveCN106596618AClose contactAvoid crush damageMaterial thermal analysisStable stateData acquisition
The invention relates to an energy dissipation-based rock-soil stability monitoring device. The device comprises a temperature sensor, a telescopic spring, a fixed steel ring, a lead drilling hole, a lead pulling resistant device, a sealing water-stopping strip, a thread-off proof device, a rubber belt, an insulation wooden plug, a lead, a mortar anchor rod, a lead steel gasket, a temperature data acquisition device, an anchor rod support plate, a torque nut, and a remote data processing and early warning device. When the rock-soil is almost destroyed, the rock-soil is fast heated. The device can ensure that a temperature sensor is closely attached to the rock-soil, realize accurate measurement of rock-soil temperature change, determine whether the rock-soil is in a stable state through rock-soil temperature monitoring and data processing analysis according to the energy dissipation theory so that rock-soil deformation is early found and a deformation zone is determined, timely provide safety pre-warning and realize real-time monitoring and early warning of rock-soil stability.
Owner:SUN YAT SEN UNIV
High and steep slope earthquake instability early warning method for under interaction of pier stud-pile-soil foundation and application of high and steep slope earthquake instability early warning method
ActiveCN113882441AReal-time monitoring of earthquake timeReal-time monitoring of stabilityFoundation testingExcavationsAccelerometerEarthquake monitoring
The invention discloses a high and steep slope earthquake instability early warning method under the interaction of a pier stud-pile-soil foundation and application of the high and steep slope earthquake instability early warning method. The high and steep slope earthquake instability early warning method comprises the steps that monitoring rods are arranged between a pier pile foundation and an anti-slide pile of a high and steep slope, from the position above the anti-slide pile to a slope top, from the position below the anti-slide pile to a slope toe and the like; earthquake horizontal acceleration and soil pressure of a soil body and a bending moment value of the monitoring rods are measured through horizontal accelerometers, soil pressure boxes and strain gauges on the monitoring rods; and then data are transmitted to a remote server through a data transmission unit, the stability condition of the high and steep slope is monitored in real time, and early warning is provided for management personnel through an earthquake occurrence alarm unit and a post-earthquake alarm unit. According to the invention, real-time post-earthquake monitoring is carried out on the complex geological condition under the interaction of the pier stud-pile-soil foundation of the high and steep slope, the cost is low, the service life is long, the operation is convenient, and the earthquake stability of the complex underground space of the high and steep slope can be effectively evaluated.
Owner:HOHAI UNIV
Intelligent method and system for quickly blocking gap of dam
PendingCN114417461AQuick plugReal-time monitoring of stabilityGeometric CADMeasurement devicesGeotechnical engineeringUnderwater
According to the rapid blocking method and system for the dam notch, the notch structure and water flow parameters are monitored on site, the evolution trend of the notch is calculated in combination with dam material mechanics and geometric parameters, and the size and the assembly position of a blocking body are determined according to the time condition. According to the plugging body, a hexahedral hollow box cage is modularly assembled at the position, with the small flow speed, of the upstream of a notch, and then vector propulsion is combined with water flow dragging force to be close to the notch from the upstream; the upstream end of the plugging body is located above the water surface, and the downstream end of the plugging body sinks to the upstream side of the underwater notch. According to the position and posture data collected in real time, the plugging body is tightly attached to the wall face of the dam on the upstream of the notch under the combined action of water flow and self driving through edge calculation or wired fine control of the valve and the driving device, then a ventilation or water inlet valve of the underwater box cage is closed, and sand and stone are thrown and filled on the downstream of the plugging body for stabilization.
Owner:NANJING AUTOMATION INST OF WATER CONSERVANCY & HYDROLOGY MINIST OF WATER RESOURCES
Rock concrete structural body stability monitoring and early warning method based on static magnetic field detection
PendingCN113405450ARealization of stability monitoring and early warningRealization of monitoring and early warningMaterial strength using tensile/compressive forcesElectrical/magnetic solid deformation measurementStructural engineeringCompressive deformation
The invention discloses a rock concrete structural body stability monitoring and early warning method based on static magnetic field detection. The method comprises the following steps: preparing a magnetic concrete test piece from concrete and a magnetic material; excavating a cavity which has the same volume as the test piece and is used for accommodating the test piece on the rock concrete structure body to be monitored; fixing a magnetic field sensor right in front of the cavity, and testing the magnetic field intensity of the current environment; putting the test piece into the cavity; testing the magnetic field intensity of the test piece in the cavity by using the magnetic field sensor until the data of the magnetic field sensor is stable, and reading the initial magnetic field intensity of the test piece in the cavity; periodically testing the magnetic field intensity of the test piece in the compressive deformation process; based on the change rate of the magnetic field intensity of the test piece, judging the stability of the rock concrete structural body to be monitored according to a preset judgment criterion, so that monitoring and early warning of the stability of the rock concrete structural body to be monitored are achieved. The method has the advantages of low test cost, high sensitivity, high accuracy and the like.
Owner:UNIV OF SCI & TECH BEIJING
Device and method for evaluating stability of capacitive non-contact displacement measuring system
PendingCN110230974ALong-term work stability monitoringReal-time monitoring of work stabilityUsing electrical meansCoaxial cableCapacitive displacement sensor
The present invention discloses a device and method for evaluating stability of a capacitive non-contact displacement measuring system. The evaluating device is used to be equivalent to a state when agap between a probe of a capacitive displacement sensor and a to-be-measured surface is constant. The evaluating device is formed by mutually connecting a standard capacitor and a triaxial cable, wherein the triaxial cable comprises an outer shield layer, an inner shield layer and a core pole. Both ends of the standard capacitor are respectively connected with the outer shield layer and the corepole on one end of the triaxial cable. The other end of the triaxial cable is finally connected with a capacitive non-contact displacement measuring system through a connecting male head, a connectingfemale head and a triaxial extension cable.
Owner:善测(天津)科技有限公司
An electromagnetic transient stabilization device and method for a distributed power generation system
ActiveCN107425544BReal-time monitoring of stabilityAchieve dampingFlicker reduction in ac networkSingle network parallel feeding arrangementsControl cellEngineering
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS +1
Underwater portable wireless optical communication equipment and system
InactiveCN113541820AGuaranteed alignmentEnsure stabilityElectromagnetic transmission optical aspectsCommunications systemUnderwater wireless optical communications
The invention discloses a underwater portable wireless optical communication equipment and system, relates to the field of underwater wireless optical communication, and aims to solve the problems that an underwater wireless optical communication channel is extremely unstable and underwater information is difficult to continuously and efficiently transmit due to the fact that existing underwater wireless optical communication equipment cannot be stably aligned with overwater wireless optical communication equipment. According to the scheme, the equipment comprises a wearable device and a suspension device, the suspension device is connected with the wearable device in a wired or wireless mode, blue, green and red light emitted by the suspension device is received by a receiving device of overwater communication equipment, and wireless optical communication between the underwater wireless optical communication equipment and the overwater communication equipment is achieved. The suspension device is not affected by irregular motion of a frogman, and optical communication alignment and stability between the suspension device and the overwater communication equipment are better guaranteed. the wireless optical communication system can control the transmitting module to adjust the angle and the direction in real time, so that the transmitting module is aligned with the receiving device of the overwater optical communication equipment at any time, the stability of an optical communication channel is ensured, and the transmission efficiency of optical communication is improved.
Owner:HUAINAN NORMAL UNIV
Animal coil special for liver ECS experiment
PendingCN111505040AGood for comparison and analysisReal-time monitoring of stabilityAnalysis using nuclear magnetic resonanceBiologyMechanical engineering
The invention discloses an animal coil special for a liver ECS experiment. The animal coil comprises an upper skeleton and a lower skeleton, the upper skeleton is detachably connected with the lower skeleton, the upper skeleton and the lower skeleton form a cylindrical structure, and antenna units are both arranged in the upper skeleton and the lower skeleton. The antenna unit positioned in the upper skeleton and the antenna unit positioned in the lower skeleton form a radio frequency coil, and a calibration mold is also arranged on the lower skeleton and is located at the side, close to the upper skeleton, of the lower skeleton. A channel for placing animals is formed between the calibration mold and the inner wall of the upper skeleton, and the upper skeleton is an arc-shaped plate. Thecalibration mold and the animal coil are designed together to realize the synchronization of a measurement process and the animal scanning, so that the imaging of a tracer sample solution and a testedobject can be completed at the same time through the one-time scanning, the measurement stability of the system can be monitored in real time, and the subsequent data analysis and comparison are facilitated.
Owner:THE SECOND HOSPITAL OF SHANDONG UNIV
Soft operating arm based on cross-modal tactile sensor and bubble driver
PendingCN114770490ALow costReduce weightProgramme-controlled manipulatorGripping headsPhysicsTactile sensor
The invention discloses a soft operation arm based on a cross-modal tactile sensor and a bubble driver. The soft operation arm comprises the cross-modal tactile sensor, a soft pneumatic finger, a square fixing plate, a triangular supporting plate and the bubble driver. The mechanical arm has safe man-machine interactivity and infinite degree of freedom, and the motion ability of the mechanical arm is improved; meanwhile, a soft pneumatic finger with a transmembrane state tactile sensing function is carried, so that self-adaptive grabbing can be realized, and multifunctional sensing can be realized by utilizing a transmembrane state tactile sensor, and whether the soft manipulator is in contact with an object or not can be sensed; sensing whether the soft pneumatic finger successfully grabs the object or not, and monitoring the grabbing stability of the object in real time in the process of grabbing and carrying the object; and the contact force in the grabbing process can be sensed, and the output grabbing force can be accurately controlled, so that safe grabbing of an object is realized.
Owner:GUANGDONG UNIV OF TECH
An offshore wind power pile foundation and its stability monitoring method
ActiveCN110080950BGet depth dataAccurate measurementWind motor supports/mountsMachines/enginesOffshore wind powerSeabed
Owner:HUNAN INSTITUTE OF ENGINEERING
A comprehensive performance testing and debugging test device and test method of a rotary drilling rig
ActiveCN111721566BReal-time monitoring of impact resistanceReal-time monitoring of stabilityMachine part testingRotary drillingDynamometerStress sensors
Owner:XUZHOU XUGONG FOUND CONSTR MACHINERY
A multi-channel high-power microwave composite biological irradiation system
ActiveCN111812121BReal-time monitoring of stabilityAvoid sparkingMaterial analysis using microwave meansPulse microwaveEngineering
Owner:ACADEMY OF MILITARY MEDICAL SCI
An Intelligent Bearing Support Device with Adjustable Geometric Dimensions
InactiveCN107131215BAutomatically adjust geometric parametersImprove working conditionMachine part testingBearing assemblyMotor driveControl system
Owner:XI AN JIAOTONG UNIV
A real-time monitoring method for the stability of muddy seabed channel slope
ActiveCN109342569BReal-time monitoring of stabilityDoes not affect normal operationAnalysing solids using sonic/ultrasonic/infrasonic wavesBuoyTransmission system
The invention discloses a real-time monitoring method for the stability of a silty submarine channel slope. The receiving system receives and converts the seabed acoustic waves into acoustic images of sedimentary profiles, and transmits the acoustic image signals of the sediments to the monitoring center through the transmission system. The monitoring center processes the transmitted acoustic images and conducts real-time monitoring and analysis of the stability of the channel slope . The real-time monitoring method for the stability of the muddy submarine channel slope provided by the invention does not affect the normal operation of the ship, and realizes all-weather real-time monitoring.
Owner:JIANGSU OCEAN UNIV
A method and system for judging the reliability of distributed clusters through weighted entropy
ActiveCN107590008BReal-time monitoring of stabilityKeep abreast of environmental changesHardware monitoringWeighted entropySlide window
The invention relates to a method and a system for judging the reliability of a distributed cluster through a weighted entropy, and belongs to the field of distributed cluster reliability. The methodcomprises the steps of previously performing weighting for log events with different severities; then performing statistics on quantities of different types of system logs of nodes of the cluster in atime period by utilizing a sliding window; calculating error rates of the nodes; according to the error rates, calculating the reliability weighted entropy of the cluster; and finally according to afluctuation range, judging the stability of the cluster. Through the method, system reliability is quantized; the reliability of the whole cluster not only can be quantitatively judged through simpledeployment but also can be monitored in real time to obtain environmental change of the cluster in time; and when the reliability of the cluster has a relatively great fluctuation, corresponding measures can be adopted in time for processing.
Owner:INST OF COMPUTING TECH CHINESE ACAD OF SCI
Multi-point Displacement Measuring Method Based on Fiber Bragg Grating Sensing Technology
The invention relates to a multi-point displacement testing method based on fiber grating sensing technology. The purpose of the present invention is to provide a multi-point displacement test method based on fiber grating sensing technology which is simple to implement, high in measurement accuracy and can realize on-line monitoring. The technical solution of the present invention is: a multi-point displacement testing method based on fiber grating sensing technology, which is characterized in that: it has a carrier, an inclinometer, a fiber grating string I and a fiber grating string II; the inclinometer is installed on one end of the carrier, As the displacement of 0 point; the fiber grating string I and the fiber grating string II are symmetrically installed on both sides of the carrier with respect to the center line of the carrier; the center wavelength λ of the fiber grating string I and the fiber grating string II is measured Bi0 , λ' Bi0 , as the initial value; get the initial angle θ of the inclinometer 0 . The invention is applicable to the fields of optical fiber grating sensing technology and engineering measurement technology.
Owner:ZHEJIANG HUADONG SURVEYING MAPPING & GEOINFORMATION +1
A suspended surface light source for satellite optical payload testing
ActiveCN107014590BImprove general performanceAvoid weightTesting optical propertiesPosition/course control in three dimensionsSecure stateOperability
The invention discloses a suspended area light source for a satellite optical load test. According to the suspended area light source, the area light source is imaged above a load in a suspended manner by employing unmanned aerial vehicles so that problems that weight limitation of a contact type area light source and the power supply safety are avoided, and hidden risks due to falling of a support of a non-contact metal support area light source are avoided; the safety state and the stability of the area light source support are monitored in real time by employing a hovering monitoring device so that when dangers occur, an alarm is emitted or emergency shutdown measures are taken, and the reliability is greatly improved; damping isolation gaskets are configured so that the area light source support can elastically fall on a satellite cabin plate when falling in an abnormal way, and the physical impact damage to the whole satellite and load equipment can be avoided; and the installation of the equipment structure is simple, the universality is high, the power supply mode does no safety harm to the whole satellite, and the operability and the promotion value are high.
Owner:AEROSPACE DONGFANGHONG SATELLITE
Distributed power supply intelligent control device
PendingCN114142613AImprove utilization efficiencyImplement cachingReactive power adjustment/elimination/compensationSystems intergating technologiesSignal conditioningLow voltage
The invention discloses a distributed power supply intelligent control device which comprises a distributed power supply system and a power grid, the power grid is composed of a high-voltage network, a medium-voltage network and a low-voltage network, and transformation transmission circuits are arranged between the high-voltage network and the medium-voltage network and between the low-voltage network and the medium-voltage network. According to the invention, redundant energy is merged into a power grid through a plurality of distributed power supply systems, a reactive compensation module is arranged to compensate unstable voltage in a high-low voltage distribution line of a grid-connected circuit, and the stability of merged current of the grid-connected circuit is monitored in real time, so that the grid-connected circuit is interrupted when a certain parameter is abnormal; functions of automatic acquisition, signal conditioning, analog-to-digital conversion and data preprocessing of state parameters of monitored equipment are realized, on-site digitalization and caching of the monitored parameters are realized, a monitoring result can be sent to a control terminal through a communication module according to needs, a power grid management master station is timely contacted, a fault is cooperatively checked, and the system is rapidly maintained. Therefore, the safety of the distributed power supply system is ensured, and the utilization efficiency of energy is improved.
Owner:SHANGHAI HOLLEYSOFT SYST
Kit for detecting free semen elastinase and application thereof
PendingCN107574224ASimple compositionEasy to produce and useMicrobiological testing/measurementPropanamideChemistry
The invention discloses a kit for detecting free semen elastinase and an application thereof. The kit comprises a reagent R1, a reagent R2, a calibrating material, a quality control material and a sample treating solution, wherein the R1 reagent is a Hepes buffering solution containing dimethyl sulfoxide; the R2 reagent is the Hepes buffering solution containing N-methoxy succinyl-propanamide-propanamide-prolyl-valine-4-propionamide and dimethyl sulfoxide; the calibrating material is an elastinase solution; the quality control material is the freeze-dried powder containing elastinase; the sample treating solution is a triton X-100 solution. The kit disclosed by the invention is used together with a full-automatic biochemical analyzer for detecting the free semen elastinase; when the free semen elastinase is detected, the reaction time is short, the required reagent dosage and sample volume are less, the linear scope is wide and the result accuracy and precision are high; the kit disclosed by the invention is suitable for clinically detecting the samples in large scale; the whole reaction process is monitored through the change of the reaction curve.
Owner:南京欣迪生物药业工程有限责任公司
Method for improving on-line calibration accuracy of AC sampling device
InactiveCN104330757AReal-time monitoring of stabilityImprove work efficiencyElectrical testingDigital signal processingElectricity
The invention discloses a method for improving the on-line calibration accuracy of an AC sampling device. The method comprises the steps of (1) connecting AC voltage and AC current into an alternating current sampling calibration device, (2) carrying out rapid sampling on the connected AC voltage and AC current and storing obtained digital signal quantity in a stack mode, (3) using digital signal processing technology, carrying out one time of computing processing per 1 / 2T, carrying out comparison with the measurement value of a front 1 / 2T, and judging whether electricity which flows in jumps or not in the time 1 / 2T, (4) capturing the stable input of the AC voltage and current through the method, if the electricity does not jump, judging that the current is stable, carrying out weighted average processing on measuring values of repeated DSP calculation, and obtaining a final measuring value, (5) comparing the final measuring value with the measuring value of the AC sampling device, and calculating the sampling error of the AC sampling device. According to the method, the working efficiency and safety of working are raised, and the test precision is high.
Owner:STATE GRID CORP OF CHINA +1
A device and method for measuring wave aberration of an optical system based on a Shack-Hartmann wavefront sensor
ActiveCN107144419BImprove stabilityReal-time monitoring of stabilityTesting optical propertiesBeam splitterWavefront sensor
The invention discloses a Shack-Hartmann wave-front sensor-based optical system wave aberration measurement device and method. The device includes a wavelength tunable laser, an attenuator, a focusing objective lens, a Y type optical fiber coupler, a first five-dimensional adjusting platform, a first objective lens, a first micropore plate, a collimating objective lens, a beam splitter, a first Shack-Hartmann wave-front sensor, an imaging objective lens, an optical system to be measured, a spherical reflector, a second Shack-Hartmann wave-front sensor and a data processing module. The measurement device is integrated with the first Shack-Hartmann wave-front sensor and the second Shack-Hartmann wave-front sensor, and therefore, the aberration of the optical system to be measured is only calculated from a measurement result, and the measurement of the aberration of optical systems of different working wavelengths can be realized with only such one measurement device adopted.
Owner:INST OF MICROELECTRONICS CHINESE ACAD OF SCI
Coal-rock interface stability measuring device with fiber grating composite structure
ActiveCN112031845AReal-time monitoring of stabilityHigh measurement accuracyForce measurement by measuring optical property variationUsing optical meansFiberPhotovoltaic detectors
The invention relates to a coal-rock interface stability measuring device with a fiber grating composite structure. The coal-rock interface stability measuring device comprises an axial pressure gauge, an anchor rod, fiber grating strain sensors, fiber grating strain gauges, an external optical cable protective shell, an optical cable, a photoelectric detector and a fiber grating demodulator, wherein the axial pressure gauge comprises a pressure elastic sheet, the fiber grating strain gauges and a pressure transfer column; when the pressure elastic sheet receives axial pressure, the pressure is transferred to the fiber grating strain gauges through the pressure transfer column by the pressure elastic sheet; four fiber grating strain gauges connected in series are connected to a first optical fiber channel of the anchor rod in series. Four optical fibers are arranged around the anchor rod, each optical fiber is connected to seven fiber grating strain sensors to sense surrounding strain,the four optical fibers and the external optical cable are connected in the external optical cable protective shell through flanges, a pressure signal is input into the fiber grating demodulator through the optical cable and the photoelectric detector for demodulation, so that the coal-rock interface stability is monitored in real time.
Owner:TAIYUAN UNIV OF TECH
Low-temperature mechanical perfusion preservation device and method
InactiveCN114766470ATemperature safetyMake sure to enterDead animal preservationEngineeringRefrigeration
The invention provides a low-temperature mechanical perfusion preservation device and method, and the device comprises an organ box for placing an organ to be transplanted, a coolant container, a filter, a bubble catcher, a semiconductor refrigeration element, a pump, a perfusion loop, a circulation loop, a sensor assembly, an electromagnetic valve assembly, and a control display unit. Wherein the sensor assembly comprises a bubble sensor, a pressure sensor, a flow sensor and a temperature sensor, the coolant container is arranged on the periphery of the organ box in a surrounding mode, an open hole is formed in the side edge of the coolant container, and the temperature sensor detects the temperature of perfusate in the organ box through the open hole; the bubble catcher comprises three openings which are respectively a liquid inlet, a filling outlet and a circulating outlet, a partition plate is vertically arranged at the bottom of the bubble catcher, and the partition plate divides the bubble catcher into a plurality of communicated cavities; and the semiconductor refrigeration element is assembled outside the bubble catcher. The low-temperature mechanical perfusion storage device can directly detect the temperature of perfusate, the perfusate with the temperature exceeding the standard can be cooled to the set temperature range as soon as possible, bubbles can be prevented from entering a perfusion pipeline as far as possible, and the accuracy of perfusion data and perfusion safety are improved.
Owner:SHANGHAI GENEXT MEDICAL TECH +1
A Method of Improving the Accuracy of Online Calibration of AC Sampling Device
InactiveCN104330757BReal-time monitoring of stabilityImprove work efficiencyElectrical testingDigital signal processingElectricity
Owner:STATE GRID CORP OF CHINA +1
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