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138 results about "Time stress" patented technology
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Time Stress can in part, be defined as time rushing in on us at a pace that is too fast to handle. There are three dimensions of time in most cultures, the past, the present and the future. Stress is suffered in the present and concerns the future. Our program is design to travel to the past to change the future.
Material high-temperature creep life-span accelerated test method
InactiveCN101308127AAccelerated Creep DesignMethod scienceSpecial data processing applicationsStrength propertiesRelaxation equationCreep rate
The invention relates to a high temperature creep life accelerated test method of a material, which comprises: a plurality of groups of short time stress relaxation tests of the material at the same temperature, acquiring a relaxation rate-stress curve based on the numerical differentiation principle, forming a relaxation creep rate-stress curve by utilizing a relaxation equation, calculating creep data to build a creep curve, and building a steady state creep rate curve and a Norton creep equation. The method starts from the physical relation between relaxation and creep, covers rather broad properties of creep strain rate by utilizing the short time relaxation process, and educes broader creep data than that educed from general creep tests by above ten times, thereby effectively reducing the amount of high temperature creep tests and time of tests and providing basic data for development of new material and engineering application.
Owner:EAST CHINA UNIV OF SCI & TECH
Dynamic soft reduction method for detecting tail end of solidified liquid core of casting blank based on pressure feedback
The invention relates to a dynamic soft reduction method for detecting the tail end of a solidified liquid core of a casting blank based on pressure feedback, belonging to the technical field of metallurgy continuous casting control. The method comprises the following steps of: firstly, establishing a control platform for remotely and automatically adjusting roll gaps of all sector sections on a continuous casting machine, and calculating the stress of the casting blank in different sector sections by utilizing the detection result of pressure sensors installed on all the sector sections; detecting the stress difference of the casting blank in each sector section during roll gap variation by changing the roll gap contraction size of each sector section; judging the position of the tail end of the solidified liquid core of the casting blank according to the stress difference between the casting blank with the liquid core and the casting blank without the liquid core; and finally, dynamically adopting different reduction quantities in all sector sections of a casting machine by using a soft reduction control system according to the position of the tail end of the liquid core judged by the method. The method for judging the tail end of the solidified liquid core of the casting blank is directly obtained by calculating the real-time stress of the casting blank. Because the calculation of casting blank surface temperature and blank shell thickness does not need a large quantity of mathematical models, the calculation method is simple and effective and ensures the stability and the execution efficiency of a casting machine control system.
Owner:HBIS COMPANY LIMITED HANDAN BRANCH COMPANY
Dangerous and old building monitoring system based on Beidou positioning technology and dangerous and old building monitoring method based on Beidou positioning technology
InactiveCN108415052ARealize communicationCollaborative workSatellite radio beaconingTransmissionInformation processingMonitoring system
The invention discloses a dangerous and old building monitoring system based on the Beidou positioning technology. The dangerous and old building monitoring system comprises a, an inclination and settlement monitoring module which is used for extracting the inclination characteristic quantity of the monitored house building in real time; b, a crack monitoring module which is used for monitoring the crack width of the monitored house building in real time; c, a stress-strain monitoring module which is used for performing real-time stress-strain characteristic quantity monitoring on the monitored house building; d, a dynamic characteristic monitoring module which is used for monitoring the change of the dynamic characteristic after internal damage of the monitored house building; e, an information processing module which is used for receiving the monitoring data outputted by the inclination and settlement monitoring module, the crack monitoring module, the stress-strain monitoring moduleand the dynamic characteristic monitoring module; f, a BDS positioning system; g, an auxiliary monitoring module; h, a central processing module; i, an intelligent analysis cloud platform; and j, a client side module. The advantages are that safety warning of the dangerous and old building can be realized.
Owner:张天骏
Tooth orthodontic correction material and preparation and application thereof
The invention relates to a tooth orthodontic correction material which comprises the following components based on the total weight of the correction material: (A), 50-90wt% of polyethylene glycol terephthalate-1,4-cyclohexane dimethyl alcohol ester; (B), 5-45wt% of polycarbonate; and (C), 5-45wt% of thermoplastic polyurethane, wherein the sum of the percentage contents of all components of the correction material is 100wt%. The invention also relates to a preparation method of the tooth orthodontic correction material and application of the tooth orthodontic correction material used for manufacturing a tooth orthodontic correction device. The tooth orthodontic correction material disclosed by the invention has high transparency and excellent low-stress relaxation rate and can provide long-time stress and long-lasting correction effect.
Owner:BEIJING UNIV OF CHEM TECH +1
Foot end mechanism of robot
The invention discloses a foot end mechanism of a robot, belongs to the relevant technical field of robots, and particularly relates to a foot end mechanism of a multi-legged walking robot. The mechanism can be adjusted according to the specific circumstance of the ground, and has fine flexibility and adaptability. The foot end mechanism comprises a mechanical portion and a force measuring portion, wherein the mechanical portion is provided with a spherical joint component to realize wide-angle flexible swing in optional directions and vertical rotation. A rubber ring is used as a shock absorption device, the impact of the ground on a foot end can be effectively reduced when a foot falls, a rubber foot pad realizes an anti-slip function and is provided with optimally designed pattern lines, friction performances are enhanced, moving stability of the robot is improved, and the rubber foot pad can be replaced according to different road surfaces. The force measuring portion is provided with a three-way force measuring sensor for measuring real-time stress of the foot end, and stress change of the foot end in the moving process is known. The foot end mechanism is simple, flexible, multifunctional and low in manufacturing cost.
Owner:DALIAN UNIV OF TECH
Micro-expression identification device and method
InactiveCN105913046AReduce complexityImprove the efficiency of micro-expression detectionAcquiring/recognising facial featuresIdentification devicePhases of clinical research
The present invention provides a micro-expression identification device and method. The device comprises an expression collector, a micro-expression identification device and a questioning validity analyzer. The expression collector is configured in the test title questioning stage of a tested person by a tester and collects the real-time stress expression information when the tested person is answering the questions; the micro-expression identification device is connected with the expression collector and is configured to identify whether the tested person's real-time stress expression is the micro expression or not according to the real-time stress expression information and the tested person's base line expression information; and the questioning validity analyzer is connected with the micro-expression identification device and is configured to determine the questioning validity of the questioning test according to the identification result of the micro-expression identification device. The present invention further provides a micro-expression identification method corresponding to the micro-expression identification device. According to the invention, the complexity of the micro-expression identification may be greatly reduced, and the efficiency of micro-expression detection is improved.
Owner:姜振宇
Method for detecting disease of metro shield tunnel based on deep learning
InactiveCN110220909AHigh measurement accuracyReduce misidentificationOptically investigating flaws/contaminationUsing optical meansInformatizationDisease
A method for detecting disease of a metro shield tunnel based on deep learning comprises the following specific implementation steps of A, camera set-up and shooting; B, over-fitting processing of data in a surveying area; C, evaluation and revision of a model; D, identification and location of tunnel damages; and E, automatic online monitoring and real-time storage of tunnel damages in the surveying area. The method provided by the invention has the advantages of 1, solving the shortcomings of low efficiency, low degree of digitization, and informatization and automation unfavorable to detection of the traditional manual inspection; 2, solving the problem that the image transmission distance is limited in the traditional tunnel damage monitoring method, and improving the measurement precision; 3, greatly alleviating recognition errors caused by environmental factors by adding a deep learning algorithm; and 4, transmitting the image information collected by the camera to the computer by using the high-speed Gigabit Ethernet to realize fast real-time transmission and immediate processing of the data online, so that the monitoring video can be viewed combined with the real-time stress state of the cable, and the event full information playback can be realized.
Owner:ZHEJIANG UNIV
Red high-brightness elastic stress luminescent material and preparation method thereof
InactiveCN103468258ANo generationNo pollution in the processForce measurement by measuring optical property variationLuminescent compositionsDisplay deviceStress sensor
Owner:QINGDAO UNIV
High electron mobility transistor device and manufacturing method thereof
ActiveCN106298882ALess likely to failImprove reliabilitySemiconductor/solid-state device manufacturingSemiconductor devicesSource fieldDielectric layer
The invention provides a high electron mobility transistor device, relating to the technical field of semiconductors. The first dielectric layer of the device is on a semiconductor layer between a gate and source and drain electrodes. A first source field plate is on the first dielectric layer between the gate and the drain electrode. A second dielectric layer is on the gate, the first source field plate and the first dielectric layer. A second source field plate is on the gate and the first source field plate. The first source field plate and the second source field plate weaken the strong electric field close to a gate area between the gate and the drain electrode. The probability of the failure of the first dielectric layer and the second dielectric layer under long-time stress and high voltage stress is little. According to the device, the strong electric field close to the gate area between the gate and the drain electrode can be weakened, and the probability of the failure of the dielectric layers between the gate and the source field plates can be reduced. The invention also provides a manufacturing method of the high electron mobility transistor device, the process is simple, and the reliability of the manufactured device is high.
Owner:昆山工研院第三代半导体研究院有限公司
Rapid starting control method and rapid starting control system for steam turbine of combined cycle generating unit
InactiveCN104775856AStart fastShorten warm-up timeMachines/enginesEngine startersElectricityHeating time
The application discloses a rapid starting control method and a rapid starting control system for a steam turbine of a combined cycle generating unit. Because the starting speed of the steam turbine is constrained by the stress level of a rotor of the steam turbine, under the condition that the stress of the rotor does not exceed a maximum stress range, the starting curve of the steam turbine is adjusted according to real-time stress received by the rotor, the heating time of the steam turbine is shortened, moreover, the steam turbine is heated under low load, consequently, the steam turbine is started rapidly, and the purpose of generating more electricity and saving energy in the process of starting is achieved.
Owner:STATE GRID CORP OF CHINA +2
Tensional cable assembly applied to flexible pressing and releasing device of spacecraft
InactiveCN105864360AEffectively fixedNo drag-outCosmonautic vehiclesRopes and cables for vehicles/pulleyFiberUltimate tensile strength
The invention provides a tensional cable assembly applied to a flexible pressing and releasing device of a spacecraft. The tensional cable assembly comprises a rope, block pins clamped to the two ends of the rope, a movable end, a fixed end and fasteners, wherein the movable end and the fixed end are arranged at the two ends of the rope correspondingly, and the two block pins at the two ends of the rope are arranged in the movable end and the fixed end correspondingly; the fasteners are arranged in the movable end and the fixed end correspondingly. Compared with the prior art, the tensional cable assembly has the beneficial effects that 1, the high-strength fiber rope can be effectively fixed to the movable end and the fixed end; 2, under the condition of long-time stress, the rope cannot be dragged out from the fixed end and the movable end; 3, external connectors are simple, and assembling is convenient.
Owner:SHANGHAI SATELLITE ENG INST
Pipeline real-time stress obtaining method
ActiveCN105403344ANo need to change existing structuresAutomatic collectionApparatus for force/torque/work measurementMeasurement pointTransducer
The invention discloses a pipeline real-time stress obtaining method. The method comprises the following steps: a series of measurement sensors are installed along the axial direction of a detected pipeline, wherein the measurement sensors are non-contact type acceleration transducers or displacement sensors, the measurement sensors are arranged at equal intervals, each measurement sensor is taken as on measurement point, and amplitude obtained by each measurement sensor is input to a processor; displacement of each point at current time is obtained in real time, wherein the relation between the stress sigma of the pipeline and displacement y is indicated in the descriptions; and a vibration-stress model indicated in the descriptions is constructed by taking measurement values of every three adjacent measurement points as a group, wherein if is assumed that there are n+1 measurement points, a stress curve of the whole pipeline is fitted by use of equivalent vibration stress of (2-n)-th measurement points. According to the invention, the pipeline real-time stress obtaining method has the following advantages: adhesion of foil gauges at the surface of the pipeline is unnecessary, an inherent structure of the pipeline does not have to be changed, and pipeline stress parameters can be accurately obtained in real time.
Owner:ZHEJIANG UNIV
Laparoscopic surgery simulation training system based on computer aided medical display
InactiveCN108492693AIncrease success rateEasy to operateEducational modelsJoystickSoft tissue deformation
The invention discloses a laparoscopic surgery simulation training system based on computer aided medical display. A CT data preprocessing module, a CT organ segmentation module and a three-dimensional volume rendering module can use artificial intelligence and a 3D volume rendering integrated rendering technology to construct a three-dimensional abdominal cavity model in real time according to customized CT scan data of a patient. A volume data mechanics loading module, a joystick control module and a joystick mechanics feedback module are used to establish an accurate force feedback model and a tissue deformation model. Simulated actual laparoscopic surgical instruments are used and the joystick mechanics feedback module is combined to truly simulate the operation position and operationmode of surgical instruments. The real-time stress state of organs and tissues can be accurately fed back. Soft tissue deformation or a cutting effect can be truly reproduced. The system can accumulate real operation experience for a laparoscopic operator, can improve the operation skills of the laparoscopic operator, and can help the laparoscopic operator to be proficient in the relative depth ofa surgical instrument and a lesion organ.
Owner:盛玉涛
Structural member residual strength assessment method based on multi-factor fusion correction
ActiveCN106844901AHigh precisionSolving problems with a single considerationGeometric CADDesign optimisation/simulationStress concentrationResidual strength
The invention provides a structural member residual strength assessment method based on multi-factor fusion correction. The method includes the following steps that finite element software is used for conducting finite element analysis on a to-be-tested structural member, and the most easily broken position, the maximum stress value and stress state distribution near the position with the maximum stress value of the to-be-tested structural member are obtained; a fatigue test is conducted on the to-be-tested structural member, and the fatigue life under the maximum stress value condition is obtained; the real-time stress value of the most easily broken position of the to-be-tested structural member under the actual working condition is measured; a stress concentration correction coefficient is obtained; the dimension correction parameter of the to-be-tested structural member is calculated; the surface quality correction parameter of the to-be-tested structural member is obtained; the residual strength of the to-be-tested structural member is calculated finally. The method takes all factors capable of affecting the damage state of the structural member into account, wherein the factors refer to the fatigue life of the structural member, stress concentration, stress distribution conditions, a manufacturing process, the surface strength and the like; the problem that in the prior art, factors taken into account are singular is effectively solved, and the accuracy of an assessment result is greatly improved.
Owner:南京市特种设备安全监督检验研究院 +1
Buried pipeline non-contact stress real-time monitoring method
ActiveCN110231111AMonitor real stress stateRealize emergency warningForce measurement by measuring magnetic property varationElectrical/magnetic solid deformation measurementMagnetic field gradientContact type
The invention discloses a buried pipeline non-contact stress real-time monitoring method. The method comprises the following steps: selecting a pipeline with same material, pipe diameter and wall thickness with the buried pipeline to perform lift-off effect testing, and acquiring the lift-off magnetic field gradient modulus under multiple groups of lift-off heights; fitting a G1-h relation curve by utilizing matlab, and obtaining numerical values of parameters a1, b1, a2, and b2 in a quantitative relation of the lift-off gradient modulus and lift-off height; placing the non-contact type detection device above the buried pipeline to obtain the magnetic field gradient modulus of the buried pipeline; and finally computing the real-time stress of the buried pipeline according to the obtained magnetic field gradient modulus of the buried pipeline. The problems that the stress-strain gage monitoring can only reflect a stress change value and the contact-type monitoring way is limited in useat the field installation are overcome, thereby preventing the pipeline from efficiency lose and breakage accident under the excessive load and stress effect.
Owner:SOUTHWEST PETROLEUM UNIV
Ice-coated electric transmission line weak link early warning method
The invention discloses an ice-coated electric transmission line weak link early warning method. The ice-coated electric transmission line weak link early warning method comprises the following steps that firstly, weather forecast information, ice-coating information and electric transmission line information are determined; secondly, the real-time stress values of grades in a tension support section are solved based on an accurate model stress calculation model of an electric transmission line wire, and the unbalanced force received by a pole tower is worked out; thirdly, the numerical relationship between the real-time stress values and the limiting stress value is analyzed, wire early warning is carried out according to grades, the unbalanced force of the pole tower and the limiting unbalanced force are compared, and pole tower early warning is carried out according to grades. By means of the ice-coated electric transmission line weak link early warning method, the broken electric transmission line wire can be intelligently judged when an electric system is in an ice-coating period. Information is comprehensively collected, stress values of all the grades of the line are measured through a ruling span calculation model and the accurate stress calculation model, and therefore whether the line faces the line broken risk or not can be accurately judged, and the defects that a traditional judging method is not direct and is low in precision and long in consumed time can be avoided.
Owner:NANJING UNIV OF SCI & TECH
Real-time strain measurement apparatus for stamping and forming and test method thereof
The invention, which belongs to the dynamic strain measurement technology field, relates to a real-time strain measurement apparatus for stamping and forming and a test method thereof. The real-time strain measurement apparatus comprises a static strain indicator, leads, foil gauges and a die. The foil gauges are fixed on test points and are connected with the static strain indicator through leads; besides, the die comprises a punch die and a female die; and a groove that is used for placing the foil gauges is arranged at positions of the female die, wherein the positions are corresponded to the test points. When real-time strain measurement on stamping and forming is carried out, different deformation portions of a workpiece and portions having different strain characteristics are utilized as test points of a sheet metal; the foil gauges are pasted; the foil gauges of the apparatus and the connecting leads are placed in the groove; the connecting leads are led out by the groove; and on the basis of utilization of a step-by-step stamping method, a real-time stress strain value is measured and obtained. According to the invention, the structure of the apparatus is simple and reasonable; it only needs to improve a die, so costs are low; and the apparatus has strong practicability; besides, the test method is simple and rapid; and during the part stamping stroke, it is convenient to measure a strain value.
Owner:YANGZHOU UNIV
Light-emitting component driving circuit and pixel circuit
InactiveCN103366672ASlow down or compensate for brightness decayImprove brightness uniformityStatic indicating devicesDriving currentPower flow
A pixel circuit relating to an organic light emitting diode (OLED) is provided by the invention, and if the circuit configuration (5T1C) thereof collocates with suitable operation waveforms, the current flowing through an OLED in the OLED pixel circuit is not varied along with the variation of the conducting voltage (Voled_th) of the OLED in a long time driving current stress, and is not varied with the threshold voltage (Vth) shift of a TFT used for driving the OLED. Accordingly, not only the brightness decay of the OLED in the long time stress is mitigated or compensated, but also the brightness uniformity of the applied OLED display is substantially improved.
Owner:DONGGUAN MASSTOP LIQUID CRYSTAL DISPLAY +1
Aging life evaluation method for carbon-fiber composite core wire
InactiveCN105784501AMaterial strength using tensile/compressive forcesTemperature stressCreep strain
The invention provides an aging life evaluation method for a carbon-fiber composite core wire.The method comprises the following steps that 1, shift processing is conducted on creep test data of the composite core wire on the basis of a time-temperature equivalence principle, and a corresponding time-temperature shift factor is obtained; 2, shift processing is conducted on a test result obtained in the first step on the basis of a time-stress equivalence principle, and a corresponding time-stress shift factor is obtained; 3, the carbon-fiber composite core wire is evaluated by means of a time-temperature-stress equivalence principle; 4, fitting is conducted on an obtained creep strain master curve by means of an improved Findley model.According to the aging life evaluation method for the carbon-fiber composite core wire, influences of temperature and stress on wire creep behaviors in the practical use process of the novel carbon-fiber composite core wire are considered overall, and the aging life evaluation method can be well applied to service life prediction of the novel carbon-fiber composite core wire.
Owner:河南中煌节能电器有限公司
Monitored wristband, monitoring wristbands and abnormal emotion monitoring system and method
InactiveCN105832350AEffective reminderQuestion validitySensorsPsychotechnic devicesMonitoring systemEngineering
The invention provides a monitored wristband, monitoring wristband equipment and an abnormal emotion monitoring system and method. The monitored wristband collects real-time stress physiological parameters produced when a wristband wearer answers the question put forward by a questioner each time, an abnormal emotion evaluation machine judges whether the current emotion of the wristband wearer is abnormal according to the baseline state physiological parameters and the real-time stress physiological parameters, when it is monitored that the current emotion is abnormal, vibration prompt messages are sent to all monitoring wristbands, and all monitoring wristbands send corresponding vibration according to the vibration indication manners in the vibration prompt messages after receiving the vibration prompt messages. According to the technical scheme, an efficient abnormal emotion detection scheme is provided, vibration can be triggered when the abnormal emotion is detected, the abnormal emotion phenomenon can be reminded effectively, and the questioner can put up more effective follow-up questions.
Owner:姜振宇
Construction method for bent cap hoop support integral detachment
The invention discloses a construction method for bent cap hoop support integral detachment. The method includes the following steps that S1, pressure bearing devices are installed; S2, steel wire ropes are installed; S3, first-time stress system conversion is conducted; S4, second-time stress system conversion is conducted; and S5, a support vertically descends to the ground. By the adoption of the construction method for bent cap hoop support integral detachment, through two times of stress system conversion, the hoop support integrally and vertically descends to the ground to be disintegrated and detached, plenty of upper air operation and hoisting lifting operation are reduced, the detaching efficiency of the bent cap hoop support is improved, and safety of constructors is guaranteed.
Owner:广州市第三市政工程有限公司
A spacecraft fragment meteorite landing area forecasting method
PendingCN109558660AHigh precisionAccurate Aerodynamic ModelSustainable transportationDesign optimisation/simulationAerodynamic derivativesEngineering
A spacecraft fragment meteorite landing area forecasting method comprises the following steps of establishing a basic pneumatic database according to a current spacecraft to be processed or fragment,wherein the basic pneumatic database comprises a basic static pneumatic database and a basic dynamic pneumatic database; storing aerodynamic force and torque data corresponding to the flight conditions in a basic static pneumatic database; storing pneumatic derivative data corresponding to the flight conditions in a basic dynamic pneumatic database; obtaining the real-time aerodynamic force data through interpolation from the basic static aerodynamic database, obtaining the aerodynamic derivative data of corresponding conditions through interpolation from the basic dynamic aerodynamic database, and obtaining the real-time stress data of the spacecraft or the fragments through calculation; and performing six-degree-of-freedom trajectory simulation according to the determined real-time stress data of the spacecraft / fragment, determining the meteorite trajectory of the spacecraft or fragment, and further determining the meteorite region of the spacecraft or fragment.
Owner:CHINA ACAD OF AEROSPACE AERODYNAMICS
Intelligent substation secondary system reliability evaluation method based on failure physics
InactiveCN106295963ASafe and stable operationResourcesInformation technology support systemFailure rateOptical coupler
The invention provides an intelligent substation secondary system reliability evaluation method based on failure physics, comprising the following steps: analyzing the failure modes and potential failure mechanisms of a relay, an optical coupler, an optical fiber and a CPU chip; building failure physics models of various failure mechanisms based on the relationship between time-stress and the inherent parameters of the devices, and getting failure life functions of the devices in various failure modes; building distribution models of failure time under various failure mechanisms, and constructing a probability density function describing failure time; calculating the instantaneous failure rate of a failure mechanism of the devices according to the probability density function and a cumulative failure distribution function of the failure mechanism of the devices; and building an intelligent substation secondary system reliability model according to failure rate functions of the devices to evaluate the reliability of a secondary system of an intelligent substation. The evaluation result provides reference for maintenance of the secondary equipment of the intelligent substation, which is conductive to safe and stable operation of the intelligent substation.
Owner:STATE GRID JIANGSU ELECTRIC POWER CO ZHENJIANG POWER SUPPLY CO +2
Method and equipment for evaluating technological property of bolt installation
ActiveCN104931185AAvoid fatigue fractureAvoid breakingMeasurement of torque/twisting force while tighteningCommunication interfacePull force
The invention relates to a method and equipment for evaluating the technological property of bolt installation, and the method comprises the steps: determining the fastening sequence of bolts; testing the total pulling force of bolts in an operation process under the condition of different loads; obtaining a real-time stress amplitude value; making a conclusion that an end face of a connected part is cracked when the real-time stress amplitude value is greater than a standard stress amplitude value; and determining the fastening sequence of new bolts till the fastening sequence of the current bolt is judged to be the optimal bolt fastening sequence. The equipment comprises a signal input end module, a signal collection and processing module, and a man-machine interaction module, wherein the signal input end module comprises a strain signal input end, a standard analog input end, and a power circuit. The signal collection and processing module comprises a processing chip. The man-machine interaction module comprises a processor, a communication interface, an operation module, and a display module. The method and equipment can test the bolts, propose a new installation technology, and facilitate the maintenance of the bolts.
Owner:BEIJING TIANYUAN SCI & TECH CREATION WINDPOWER TECH
Stress testing device for brake adjuster
ActiveCN102840973AFree from damageAvoid damageMachine part testingForce measurementEngineeringMechanical engineering
The invention discloses a stress testing device for a brake adjuster, and belongs to the technical field of stress testing of the brake adjuster; the invention aims to provide a device for testing a real-time stress condition and a starting force on the brake adjuster. The device comprises a bracket, a bearing plate, an adjusting rod, a guiding rod, a belleville spring and a force sensor. The device is structurally characterized in that the bearing plate is arranged in front of the bracket, two guiding rod locating holes are arranged in the bearing plate, and adjusting rod locating holes are arranged in four corners on the bearing plate; the adjusting rod, the force sensor, the guiding rod and the belleville spring are arranged between the bearing plate and the bracket; the belleville spring is sleeved on the guiding rod, a front section of the guiding rod is sleeved in the guiding rod locating holes; the force sensor is fixed on the bracket, and is arranged right behind the guiding rod and is in close contact with the guiding rod; the adjusting rod comprises a front part, a middle part and a rear part, wherein the front part is sleeved in the adjusting rod locating holes in the bearing plate and the rear part is fixed with the bracket; the device is mainly applied to the stress testing of the brake adjuster.
Owner:中电科鹏跃电子科技有限公司
Real-time pre-stress monitoring type clip anchoring tool and anchoring tool tension method thereof
ActiveCN104895334APrecise control of prestressHigh anchor precisionBuilding material handlingElectrical resistance and conductancePre stress
The invention provides a real-time pre-stress monitoring type clip anchoring tool and an anchoring tool tension method thereof, relates to a clip anchoring tool and an anchor tool tension method, and aims at solving the problems of the exiting anchoring tool that the loss of the pre-stress anchoring tool is difficult to monitor on real time and the tension control stress of pre-stressed ribs cannot be accurately ensured. The device is that a regular octagonal groove is processed in the outer surface of an inner anchoring ring in the radial direction; a conductor hole channel is corresponding to the axial position of the regular octagonal groove; a monitoring instrument is connected with eight resistance straining sheets through connectors; eight resistance straining sheets are arranged on four side surfaces at intervals in the regular octagonal groove; two resistance straining sheets are arranged on each side surface provided with the resistance straining sheet. The method comprises the steps of 1, mounting the anchoring tool; 2, tensioning a jack; 3, repeating step 2 according to the display value of the real-time pressure monitoring instrument until reaching sigma con; 4, connecting the real-time stress monitoring instrument during using the structure, and operating according to the step 3. The device and the method are applied to the pre-stress monitoring and the tensioning of the pre-stressed ribs.
Owner:HARBIN INST OF TECH
Structure synchronous unloading device and construction method thereof
ActiveCN105201219AAvoid forceImprove securityBuilding material handlingSynchronous controlControl system
The invention discloses a structure synchronous unloading device and a construction method thereof. The structure synchronous unloading device comprises an upper structure column, a lower structure column, a structure beam, a gap, a bracket, a temporary fixing device and a synchronous unloading control system, wherein the gap is formed between the upper structure column and the lower structure column; the bracket is welded on the upper structure column; the upper structure column and the lower structure column are fixed through the temporary fixing device; a cushion block, an inclined cushion block, an adjusting cushion block, a hydraulic jack and a U-shaped cushion block are respectively placed on the structure beam from bottom to top; and the synchronous unloading control system comprises a hydraulic power unit, a synchronous control system and a hydraulic line. The construction method comprises the following steps: determining the size of the gap; temporarily fixing through the temporary fixing device; placing the cushion block and the like; unloading; installing the hydraulic power unit; dismantling the U-shaped cushion block; unloading in a graded way; and welding the upper structure column and the lower structure column. The structure synchronous unloading device is high in safety, low in low, little in pollution and convenient and fast in operation, a support jig frame is not used as a force transfer structure, and the long-time stress of a jack piston is avoided.
Owner:CHINA CONSTR THIRD ENG BUREAU GRP CO LTD
System and method for analyzing curvature and stress information of plate structure
InactiveCN1231749CUsing optical meansForce measurement by elastic gauge deformationMonitoring systemLarge deformation
Acceptance of large deformations for determining layered or graded structures (1710), including body forces such as gravitational, electrostatic or electromagnetic forces, and other forces, support forces, and concentrations uniformly distributed over the structure (p) The action of the force (P). A real-time stress monitoring system (1700) is also disclosed to provide in situ monitoring of devices based on large deformation analysis methods. For example, a coherent gradient sensing module (1730) may be included in such a system.
Owner:CALIFORNIA INST OF TECH
Beat assisted temporal pressure password
InactiveUS20180349592A1Improve usabilityImprove securityInternal/peripheral component protectionDigital data authenticationPasswordComputer science
A beat assisted temporal pressure password authentication method in which a user enters a password by pressing a touch interface, and holding the pressure within one of multiple pressure ranges for passing certain number of beats, for one or more times. A password is then produced as a sequence of the pressure range code and the count of the beats passed in that pressure range.
Owner:TAO HAI
Ultra-large mud pump shaft L-shaped sealing element rubber
The invention relates to an ultra-large mud pump shaft L-shaped sealing element rubber which is prepared from butadiene-acrylonitrile rubber 220.240, sulfur, accelerator, peroxide, auxiliary crosslinking agent, nano zinc oxide, zinc stearate, anti-aging agent, carbon black, process oil DOP and microcrystalline wax. The invention has the advantages of high wear resistance, high strength, high pressure resistance, shock resistance and deformation resistance, and is superior to the foreign products; the service life is obviously prolonged, reaching 300 days; the performance indexes are far beyond the Chinese Standard; especially the compression deformation, which is the elastic recovery capacity after long-time stress of the rubber material, is the main index for judging the sealing property; and the Chinese technical level of the compression deformation is just or slightly beyond the Chinese Standard, but the compression deformation of the invention is down to 10 below.
Owner:TIANJIN BAOBOTE SEALING TECH
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