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46results about How to "Accurate force measurement" patented technology
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Force measurement system having inertial compensation
ActiveUS8315822B2Accurate compensationAccurate force measurementForce measurementInertial sensorsAccelerometerAngular velocity
A force measurement system having inertial compensation includes a force measurement assembly with at least one accelerometer configured to measure the acceleration thereof. According to one aspect of the invention, the force measurement system additionally includes at least one angular velocity sensor configured to measure the angular velocity of the force measurement assembly. According to another aspect of the invention, the force measurement system additionally includes a data processing device with a computer-readable medium loaded thereon that is configured to execute a calibration procedure for determining the inertial parameters of the force measurement assembly by utilizing the measured acceleration of the force measurement assembly while the force measurement assembly is subjected to a plurality of applied linear and / or rotational motion profiles. According to still another aspect of the invention, the at least one accelerometer is disposed on the force transducer.
Owner:BERTEC
Vacuum plume aerodynamic force measuring system and method
The invention discloses a vacuum plume aerodynamic force measuring system and method. The vacuum plume aerodynamic force measuring system comprises a vacuum chamber, an engine, a force measuring model, a plume protection cover, a displacement mechanism, a mounting base and a six-component balance force measuring system. According to the vacuum plume aerodynamic force measuring system and method, a small-range six-component balance is used as a force measuring element for directly measuring vacuum plume aerodynamic force, so that a measurement result is more accurate; according to the characteristics of high speed and high temperature of engine vacuum plumes, duralumin is used as a material for designing the force measuring model and the plume protection cover, so that the force measuring model and the six-component balance are prevented from being damaged; the displacement mechanism is used for driving the six-component balance and the force measuring model to scan a plume field, and aerodynamic force measurement can be conducted at multiple positions under multiple working conditions in one close-cabin experiment. The vacuum plume aerodynamic force measuring method comprises the following steps that the six-component balance is calibrated, a six-component balance working formula is calculated, experimental equipment is installed, the experiment is conducted, and data are processed.
Owner:BEIHANG UNIV
Multifunctional digital display dynamometer
InactiveCN101226088AEasy to operateAccurate force measurementForce measurement using counterbalancing forcesUsing mechanical meansDynamometerEngineering
The invention relates to a multifunctional digital display force measuring instrument, which comprises a reverse force holding frame. The multifunctional digital display force measuring instrument is characterized in that: a force applying mechanism with a pull rod is arranged on the reverse force holding frame, the pull rod arranged above the reverse force holding frame is sleeved with a cylinder bushing type pressure sensor and a digital display instrument connected with the cylinder bushing type pressure sensor. The multifunctional digital display force measuring instrument is mainly used for force value inspection in architectural engineering.
Owner:SHANDONG PROVINCIAL ACAD OF BUILDING RES
Force measuring method of ventilation model under condition of free jet wind tunnel test
The invention provides a force measuring method of a ventilation model under the condition of a free jet wind tunnel test. The force measuring method of the ventilation model under the condition of the free jet wind tunnel test comprises the following steps that a ventilation model force measuring device is designed, specifically, the ventilation model, a measurement balance, a base, a tail support rod and a hot air flow blocking assembly are included, wherein the measurement balance is arranged in the ventilation model and used for measuring the aerodynamic performance of the ventilation model; the tail support rod realizes the supporting of the ventilation model in a tail support mode, one end of the tail support rod is arranged on the base, the other end of the tail support rod is connected with the measurement balance, and the tail support rod is not in contact with the inner wall of the ventilation model; the hot air flow blocking assembly is arranged between the tail support rodand the inner wall of the ventilation model, so that the tail support rod and the inner wall of the ventilation model are not in contact, and the hot air flow blocking assembly is used for reducing the flow velocity of hot air flow entering the tail of the ventilation model in the ventilation model; the ventilation model force measuring device is placed in a free jet wind tunnel; and the wind tunnel test is carried out to obtain effective force measuring data. According to the force measuring method of the ventilation model under the condition of the free jet wind tunnel test, the technical problems such as the inaccuracy of the model force measuring due to the inability to completely simulate the real flight environment of an aircraft in a conventional wind tunnel in the prior art can besolved.
Owner:BEIJING AEROSPACE TECH INST
Force-measuring device
ActiveUS9823148B2Improve stabilityAccurate force measurementTension measurementForce measurement by elastic gauge deformationElement spaceEngineering
A force-measuring device is provided for integrating measurement of at least three radial forces acting centrally, in particular for radial presses or collets. The force-measuring device comprises a stretching-element assembly, which is concentric to a measurement axis and which comprises at least one stretching element. The force-measuring device also has at least three pressure elements spaced from each other in a circumferential direction, wherein two spreading elements are connected to the at least one stretching element at ends of the stretching element, the pressure elements are supported, by means of pressure inclines, on corresponding sliding inclines of the spreading elements, a transmitting element is fastened to a first of the two spreading elements, and a measuring sensor acts between the second of the two spreading elements and the transmitting element.
Owner:UNIFLEX HYDRAULIC
Suspension weight reduction training device
The invention relates to a suspension weight reduction training device which comprises a base, a supporting frame, a wearable device, a rope and a rope winding device. Rollers are arranged on the base, the supporting frame is placed on the base, one end of the rope is connected with the rope winding device and wound on the rope winding device, the other end of the rope is connected with the wearable device, and the rope winding device comprises a rope winding and unwinding device. The suspension weight reduction training device can prevent the problems that ropes are overlapped and winding paths are messy in the winding process.
Owner:HUBEI UNIV OF ARTS & SCI
Force-measuring device
ActiveUS20150316433A1Improve stabilityAccurate force measurementApparatus for force/torque/work measurementForce measurement by elastic gauge deformationMachine pressPhysics
A force-measuring device is provided for integrating measurement of at least three radial forces acting centrally, in particular for radial presses or collets. The force-measuring device comprises a stretching-element assembly, which is concentric to a measurement axis and which comprises at least one stretching element. The force-measuring device also has at least three pressure elements spaced from each other in a circumferential direction, wherein two spreading elements are connected to the at least one stretching element at ends of the stretching element, the pressure elements are supported, by means of pressure inclines, on corresponding sliding inclines of the spreading elements, a transmitting element is fastened to a first of the two spreading elements, and a measuring sensor acts between the second of the two spreading elements and the transmitting element.
Owner:UNIFLEX HYDRAULIC
Multi-dimensional force/torque sensor
InactiveCN104913865AReduce volumeReduce manufacturing costForce measurementWork measurementMulti dimensionalMechanical engineering
The invention relates to a multi-dimensional force / torque sensor. The multi-dimensional force / torque sensor comprises a mounting assembly and a conduction assembly which is accommodated in and abuts against the mounting assembly; the mounting assembly includes an upper cover and a lower cover which are fixed to each other; the upper cover and a lower cover are respectively provided with a first end surface; the first end surfaces of the upper cover and the lower cover are opposite to each other; a cavity and four recessed portions communicated with the cavity are formed in the first end surface of the upper cover and the first end surface of the lower cover respectively; the conduction assembly includes a cross frame and a plurality of pressure induction components attached to the cross frame; the cross frame includes four arms which form a cross; each arm includes four side surfaces which are not perpendicular to a plane formed by the central axis of the cross frame; one induction component is attached to the four side surfaces respectively; the cross frame is accommodated in the cavity of the upper cover and the cavity of the lower cover; each arm is accommodated in a corresponding recessed portion; when the cross frame is stressed, the cross frame tends to move relative to the upper cover and the lower cover; and the upper cover and the lower cover block the cross frame, so that the cross frame can be prevented from moving relative to the upper cover and the lower cover, and will apply stress to the induction components attached to the cross frame.
Owner:HONG FU JIN PRECISION IND (SHENZHEN) CO LTD +1
Method and measuring system for determining deformations of a geometric body with the aid of force measuring sensors or deformation measuring sensors
ActiveUS9518876B2Accurate detectionAccurate force measurementWork measurementMeasurement/indication equipmentsClassical mechanicsSpatial direction
A method for ascertaining deformations of a geometric body or for measuring forces or torques acting thereon using force measuring sensors or deformation measuring sensors. A plurality of such sensors are arranged on the geometric body in at least two groups. A first group of sensors registers forces acting on the geometric body or deformations of the geometric body in a first spatial direction with reference to a coordinate system fixed relative to the geometric body. A second group of sensors registers forces acting on the geometric body or deformations thereof in a second spatial direction with reference to the coordinate system fixed relative to the geometric body, which is independent of the first spatial direction. Signal outputs of the sensors are compared to one another for the purpose of registering and evaluating signals and for determining or assessing force components or deformation components acting in different spatial directions.
Owner:PRO MICRON GMBH
Device and method for measuring stress of coal particle in concentrated phase gas-solid fluidized bed
ActiveCN102778322AReduce interferenceAvoid influenceFluid pressure measurement by electric/magnetic elementsStress measurementData acquisition
The invention discloses a device and method for measuring stress of a coal particle in a concentrated phase gas-solid fluidized bed, belonging to the device and the method for measuring the stress of the coal particle. The device comprises a gas-solid fluidized bed, an air distributing chamber, an air flow distribution plate, a flexible rope and a high-precision contact tension device, wherein high-density magnet mineral powder is put in a gas-solid fluidized bed body statically, compressed air is fed into the gas-solid fluidized bed after being uniformly distributed through the air flow distribution plate through the air distribution chamber, after a fluidizing state is stabilized, the coal particle is tightly connected with the flexible rope and irregularly moves in the fluidized bed, stress information is measured by the high-precision contact tension device in real time, a voltage signal is converted into a mechanical signal through a signal converter, and then the mechanics signal is transmitted to a data acquisition and output device and is displaced on a data signal display after being processed by the stress information. The device and method have the advantages of simple structure, convenience in operation, easiness in control, high measurement precision and good reliability, capability of realizing accurate stress measurement of multiple large-size particles in a concentrated gas-liquid multiple-phase flow, and wide application range.
Owner:CHINA UNIV OF MINING & TECH
Six-dimensional force measuring device and method based on viscous-elastic material polishing
PendingCN107471085AReduced tool wearReduced force slipGrinding wheel securing apparatusLapping machinesSquare ShapeEngineering
The invention relates to a six-dimensional force measuring device and method based on viscous-elastic material polishing, and belongs to the technical field of ultraprecision machining and complex optical element machining and measurement and control. A polishing head with a viscous-elastic material layer is mounted in a clamp spring, the clamp spring is mounted in a groove in the front end of an elastic main body, the clamp spring makes attached contact with the inner wall of the groove in the front end of the elastic main body, and an internal thread fastening cap is connected to the front end of the elastic main body through a thread; force sensing devices in parallel connection are preloaded to the elastic main body and clamped into grooves distributed in the periphery of the elastic main body in a square shape; and an outer sleeve and the elastic main body are connected through sleeve preloaded screws, a lower cap and the elastic main body are connected through lower cap preloaded screws, and a transmission part is suspended in an expectant closed space formed by the lower cap, a contact ring and the outer sleeve. The six-dimensional force measuring device has the advantages that online precision measurement can be achieved, the coupling degree is small, the transverse force interference is small, six-dimensional force can be accurately and precisely measured in real time, and mounting and dismounting are convenient.
Owner:CHANGCHUN UNIV OF TECH
Electric hoist handle
InactiveCN111017779AControl work statusImprove carrying capacityPortable liftingInterference fitBall bearing
The invention discloses an electric hoist handle, which comprises a main shaft. A connecting plate, a display screen box, a connecting ring, a handle and a lifting ring are sequentially arranged on the main shaft from top to bottom; the two ends of the connecting plate are connected with the display screen box through bolts respectively; a locking nut in threaded connection with the top end of themain shaft is in press fit with the upper surface of the connecting plate; a connecting cylinder is installed on the connecting plate through bolts; and a steel wire rope fixing shaft coaxial with the main shaft is in interference fit in the connecting cylinder through a thrust ball bearing. The electric hoist handle makes the handle and the lifting appliance combined into a whole, is compact instructure, and can be suitable for hoisting small-size objects; the steel wire rope fixing shaft can rotate along the main shaft through cooperation of the thrust ball bearing and the steel wire ropefixing shaft, so that winding prevention of a steel wire is achieved; and tension and pressure sensors are arranged in the connecting ring and embedded in the main shaft, and are equipped with sensorbase plates, so that external interference is greatly reduced, and force measurement is more accurate.
Owner:HEFEI UNIV OF TECH
Coffee tamper
ActiveUS20200359827A1Overcome defectsAvoid injuryBeverage vesselsAgricultural engineeringStructural engineering
The present invention provides a coffee tamper, comprising a casing. A driving device is arranged on the inner top of the casing, connected to a tamping device and used to drive the tamping device to press down and move up. The tamping device is used to press down a container filled with coffee powder and comprises a main shaft, the driving device is connected to the upper end of the main shaft, and a tamping head is connected to the lower end of the main shaft and can be pressed into the container; and in one of embodiments, a container pressing head is sleeved on outside of the tamping head and has an outer cover sleeved on outside of the tamping head, the lower edge of the outer cover is located on the same horizontal plane and presses against the upper edge of the container, and the tamping head can move up and down relative to the container pressing head. The present invention provides a novel coffee tamper, which can overcome defects of existing equipment, apply uniform pressure on coffee powder and make flat coffee powder.
Owner:SLINGSHOT TECH CORP LTD
Electrostatic adsorption force test platform and force measuring method thereof
ActiveCN108981998AAccurate force measurementAccurate measurementApparatus for force/torque/work measurementMatched controlEngineering
The invention discloses an electrostatic adsorption force test platform and a force measuring method thereof. The electrostatic adsorption force test platform includes a platform base, a base plate, abase frame, a cross ballscrew drive device, an electrostatic adsorption film, an adsorption film support, and a matched control acquisition interface window, wherein the base frame and the cross ballscrew drive device are both arranged on the platform base; the base plate is vertically arranged on the base frame; the adsorption film support is arranged on the cross ballscrew drive device, and isdriven by the cross ballscrew drive device to move in the tangential and normal direction of the base plate; and the electrostatic adsorption film is arranged on the adsorption film support and is parallel to the base plate. The electrostatic adsorption force test platform and the force measuring method thereof can accurately and conveniently measure the normal and tangential electrostatic adsorption force of the electrostatic adsorption film on the same platform, and the measurement process is reasonable and the measurement is accurate.
Owner:CHONGQING UNIV
Automatic device for measuring setting time of concrete mixture
The invention discloses an automatic device for measuring setting time of a concrete mixture. The device comprises a portal type rack fixed on a machine base, wherein an adjustable-speed motor, a worm gear and worm pair driven by the adjustable-speed motor as well as a microcontroller are arranged on a cross beam of the portal type rack; an output control end of the microcontroller is connected with a control input end of the adjustable-speed motor, and a data output end of the microcontroller is connected with a data signal input end of a displayer; a travel scale and a perpendicular lead screw driven by the worm gear and worm pair to move up and down are arranged on the cross beam of the portal type rack perpendicularly downwards, and a probe mounting seat is arranged at the lower end of the perpendicular lead screw; a sample platform and a weighing sensor are arranged under the probe mounting seat and on the machine base from top to bottom, and a signal output end of the weighing sensor is connected with a signal input end of the microcontroller through an analog signal / digital signal converting module. The device has the advantages of automatic and constant-speed pressurization, avoidance of impact force, high intelligent degree, accurate penetration depth, smallness and portability.
Owner:YELLOW RIVER ENG CONSULTING
Soft tissue force measuring device
The invention provides a soft tissue force measuring device including a force measuring table, a force measuring sensor mounted on the force measuring table, a pad used for contacting with a soft tissue and arranged on a force measuring face of the force measuring sensor in a covering manner. The invention solves a problem that force measurement cannot be performed on the soft tissue accurately in the prior art.
Owner:BEIJING AKEC MEDICAL
Soft tissue force measuring device
PendingCN106137227AAccurate force measurementMonitoring powerSurgeryMuscle exercising devicesForce sensorBiomedical engineering
The invention provides a soft tissue force measuring device. The soft tissue force measuring device comprises a force measuring platform, a force measuring sensor installed on the force measuring platform and a gasket used for making contact with soft tissue, and the force measuring face of the force measuring sensor is covered with the gasket. The gasket is provided with a containing cavity, and at least one part of the force measuring sensor is located in the containing cavity. The soft tissue force measuring device solves the problem that in the prior art, force measuring cannot be accurately carried out on the soft tissue.
Owner:BEIJING AKEC MEDICAL
Aircraft throttle lever testing device
ActiveCN112129516AAccurately judge the operationAccurate judgment of reliabilityMachine part testingFlight vehicleTestbed
The invention relates to the technical field of aircraft component detection, in particular to an aircraft throttle lever testing device. The testing device comprises a testing platform and a testingmechanism, wherein the testing mechanism is arranged on the testing platform and comprises a driving assembly and a clamping assembly connected with the driving assembly; the driving assembly is suitable for driving the clamping assembly to rotate; a rotating axis of the clamping assembly and a rotating shaft of a throttle lever are coaxially arranged; the driving assembly is provided with a forcemeasuring unit; and the force measuring unit is suitable for measuring the loading force of the throttle lever when the clamping assembly rotates. On one hand, the stress direction of the clamping assembly on the throttle lever is the tangential direction of an arc-shaped track, which is consistent with the force application direction of the hand on the throttle lever when the throttle lever is operated by the hand, so that the running condition of a throttle table in actual use is accurately judged; and on the other hand, the force measuring unit is mounted on the driving assembly, so that tiny errors caused by slight relative sliding are avoided, and force measurement is more accurate.
Owner:北京天创凯睿科技有限公司
Spindle spring force measuring device
InactiveCN103630284AEasy to polishAccurate force measurementApparatus for force/torque/work measurementSpring forceEngineering
The invention discloses a spindle spring force measuring device which comprises a workbench (2), a force measuring meter (1), a supporting plate (4), a plurality of guide rods (3) parallelly penetrating the supporting plate (4), and a pushing rod (5) pushing a spindle spring (6) into intervals of the guide rods (3) and pushing the spindle spring towards the force measuring meter (1). The force measuring meter and the supporting plate are fixed on the workbench. The spindle spring force measuring device has the advantages of simple structure, accuracy in force measuring and convenience for operation.
Owner:GUIZHOU HUAYANG ELECTRICAL
Double-disc type lubricating oil traction force testing machine
ActiveCN102818752ARealize the loadDrag force measurement is preciseSurface/boundary effectCouplingEngineering
The invention relates to a double-disc type lubricating oil traction force testing machine, which comprises a motor I, a motor II, a coupling I, a coupling II, a lower disc shaft, an upper disc shaft, a lower disc, an upper disc, a hydraulic loading mechanism and a force testing mechanism. With the testing machine of the present invention, real working conditions of the lubricating oil under an elastohydrodynamic lubrication state can be simulated, a rolling movement between the corresponding transmission contact members is accompanied with a sliding movement, continuous loading can be achieved, and the lubricating oil traction force under an elastohydrodynamic lubrication state can be accurately measured.
Owner:QILU UNIV OF TECH
Gearbox gear shift mechanism force measuring device
PendingCN108225635AThe force measurement process is stableAccurate force measurementMachine gearing/transmission testingApparatus for force/torque/work measurementEngineeringChassis
Owner:CHANGZHOU RUITAI ENG MASCH CO LTD +1
An electrostatic adsorption test platform and force measurement method thereof
ActiveCN108981998BAccurate force measurementAccurate measurementApparatus for force/torque/work measurementAdsorptive membraneTest platform
The invention discloses an electrostatic adsorption force test platform and a force measuring method thereof. The electrostatic adsorption force test platform includes a platform base, a base plate, abase frame, a cross ballscrew drive device, an electrostatic adsorption film, an adsorption film support, and a matched control acquisition interface window, wherein the base frame and the cross ballscrew drive device are both arranged on the platform base; the base plate is vertically arranged on the base frame; the adsorption film support is arranged on the cross ballscrew drive device, and isdriven by the cross ballscrew drive device to move in the tangential and normal direction of the base plate; and the electrostatic adsorption film is arranged on the adsorption film support and is parallel to the base plate. The electrostatic adsorption force test platform and the force measuring method thereof can accurately and conveniently measure the normal and tangential electrostatic adsorption force of the electrostatic adsorption film on the same platform, and the measurement process is reasonable and the measurement is accurate.
Owner:CHONGQING UNIV
Portable intelligent fitness device
PendingCN112807633AEasy to carryAccurate force measurementGymnastic exercisingTouch PerceptionSimulation
A portable intelligent fitness device is disclosed in the invention, and comprises a shell with an opening in the top and a top cover covering the opening in the top of the shell, a circuit mainboard, a force measuring mechanism and a battery module are arranged in the shell, the force measuring mechanism is connected with the top cover, and a switch button and a display module are arranged on the side wall of the shell. The force measuring mechanism, the battery module, the switch button and the display module are all electrically connected with the circuit mainboard, and the circuit mainboard comprises a Bluetooth module and a feedback module. According to the portable intelligent fitness device provided by the invention, the force measurement precision of the force measuring mechanism is high, and a user can feel the change of force through touch feeling and visual feeling, so that the user can be better guided to exert force, keep force and relax in the fitness process; and meanwhile, the Bluetooth module is arranged, so that the mobile terminal can give reasonable fitness suggestions to the user in combination with the fitness historical data of the user.
Owner:东莞小力智能科技有限公司
Device and method for measuring stress of coal particle in concentrated phase gas-solid fluidized bed
ActiveCN102778322BReduce interferenceSolve the bottleneck where the force cannot be directly measuredFluid pressure measurement by electric/magnetic elementsStress measurementData acquisition
The invention discloses a device and method for measuring stress of a coal particle in a concentrated phase gas-solid fluidized bed, belonging to the device and the method for measuring the stress of the coal particle. The device comprises a gas-solid fluidized bed, an air distributing chamber, an air flow distribution plate, a flexible rope and a high-precision contact tension device, wherein high-density magnet mineral powder is put in a gas-solid fluidized bed body statically, compressed air is fed into the gas-solid fluidized bed after being uniformly distributed through the air flow distribution plate through the air distribution chamber, after a fluidizing state is stabilized, the coal particle is tightly connected with the flexible rope and irregularly moves in the fluidized bed, stress information is measured by the high-precision contact tension device in real time, a voltage signal is converted into a mechanical signal through a signal converter, and then the mechanics signal is transmitted to a data acquisition and output device and is displaced on a data signal display after being processed by the stress information. The device and method have the advantages of simple structure, convenience in operation, easiness in control, high measurement precision and good reliability, capability of realizing accurate stress measurement of multiple large-size particles in a concentrated gas-liquid multiple-phase flow, and wide application range.
Owner:CHINA UNIV OF MINING & TECH
Transparent resistance type pressure sensor and application
PendingCN112631461AHigh pressure sensitivityAvoid false sensor touchesInput/output processes for data processingPhysicsConductive channel
The invention discloses a transparent resistance type pressure sensor. The sensor comprises a pressure substrate and a support substrate which are oppositely arranged, and a plurality of mutually separated pressure-sensitive units are uniformly distributed between the pressure substrate and the support substrate; each pressure-sensitive unit comprises a pressure-sensitive film, and the pressure-sensitive film comprises an optically transparent elastic polymer and conductive nanoparticles; the nanoparticles are distributed on the surface and inside of the elastic polymers and are reticular, and at least one conductive channel is formed; the pressure-sensitive units deform to cause resistance change when being subjected to pressure applied to one side of the pressure substrate, and when the pressure on one side of the pressure substrate is removed, the resistance and the shape of the pressure-sensitive units are restored to the initial state. The invention further discloses an electronic system applying the transparent resistance type pressure sensor to multi-point touch detection hardware and software. The pressure sensor is sensitive to pressure and good in use durability.
Owner:RET EQUIP INC
Rail vehicle dual six degrees of freedom motion test platform
ActiveCN108387353BTest longitudinal stiffnessTest lateral stiffnessRailway vehicle testingElasticity measurementBogieEngineering
Owner:JILIN UNIV
Double-disc type lubricating oil traction force testing machine
ActiveCN102818752BRealize the loadDrag force measurement is preciseSurface/boundary effectCouplingEngineering
The invention relates to a double-disc type lubricating oil traction force testing machine, which comprises a motor I, a motor II, a coupling I, a coupling II, a lower disc shaft, an upper disc shaft, a lower disc, an upper disc, a hydraulic loading mechanism and a force testing mechanism. With the testing machine of the present invention, real working conditions of the lubricating oil under an elastohydrodynamic lubrication state can be simulated, a rolling movement between the corresponding transmission contact members is accompanied with a sliding movement, continuous loading can be achieved, and the lubricating oil traction force under an elastohydrodynamic lubrication state can be accurately measured.
Owner:QILU UNIV OF TECH
An integrated detection system for highways
ActiveCN106840692BAvoid couplingAccurate force measurementVehicle testingApparatus for force/torque/work measurementCouplingEngineering
The invention provides an integrated detection system. A three-dimensional combined force measuring device is provided with horizontal connection supports provided with installation through holes. The two ends of each horizontal sensor are provided with the corresponding horizontal connection supports. The horizontal sensors and the installation through holes can only be rotationally matched and connected with each other around the axes of the installation through holes, and the horizontal connection supports are fixedly connected with a table top. After the table top bears force in the vertical direction (z-axis), a stress point of the table top moves downward, but the horizontal sensors in the x-axis direction and in the y-axis direction and the installation through holes can only be rotationally matched and connected with each other around the axes of the installation through holes, so that the horizontal sensors in the x-axis and y-axis directions do not send out signals, and inter-dimension coupling is avoided. Influences of the gravity of a motor vehicle on braking force and sideslip force in the measuring process can be effectively avoided, and then the braking force of the motor vehicle is accurately measured.
Owner:BEIJING PANTIAN NEW TECH
Flexible jack
PendingCN109534211AThe power transmission path is clearOptimize the power transmission pathLifting devicesStress measurementTest quality
The invention provides a flexible jack. The jack comprises a cylinder, a piston rod and a piston; the piston divides the cylinder into an upper oil cylinder and a lower oil cylinder, a pressure oil nozzle is arranged on the lower portion of the lower oil cylinder, and a pressure relief oil nozzle is arranged on the upper portion of the upper oil cylinder; a flexible cavity is formed in the portion, away from the ejection end of the piston or on a lower convex block at the bottom of the cylinder, of the piston rod, the flexible cavity is internally provided with a flexible pressure-bearing capsule matched with the cavity shape, a flexible pressure-bearing capsule mat is arranged on the portion, located at an opening of the flexible cavity, of the flexible pressure bearing capsule, the areaof the flexible pressure-bearing capsule mat is equal to the effective output area of the lower oil cylinder, and the flexible pressure-bearing capsule mat is fixedly connected with the opening of theflexible cavity; the flexible pressure-bearing capsule is communicated with the lower oil cylinder through an oil through hole. Accordingly, a force transferring path is definite, the problems that in an existing rock mass mechanics test, a hydraulic (force) steel pillow, the flexible jack and an ordinary jack are used, rock mass stress measurement is inaccurate, compressive rock mass or rigid plate stress is nonuniform, and deformation deviation exits are solved, and the rock mass mechanics test quality is improved.
Owner:CHANGJIANG RIVER SCI RES INST CHANGJIANG WATER RESOURCES COMMISSION
Air flotation force measuring device of wind tunnel model
InactiveCN101832851BHigh precision measurementAccurate measurementAerodynamic testingEngineeringAngle of attack
The invention relates to an air flotation force measuring device of a wind tunnel model, and mainly relates to a device for measuring the force of a wind tunnel testing model by adopting an air flotation support. In order to solve the problem that the traditional force measuring technology and a conventional fore measuring element can not satisfy the requirements on higher aerodynamic force elevating force, smaller aerodynamic force resistance and high-precision measurement of the resistance, the invention has the technical scheme that the air floatation force measuring device comprises a multi-component force measuring balance, a model fulcrum bar, a firing case, a notching sunk screw, a precise air flotation lead rail, an internal hexagon screw, a sensor permanent seat, a force measuring trouble eliminating rod, a high-precision axial tension and compression sensor, a sensor connecting rod, a precise air floatation lead rail permanent seat, an internal hexagon fixing screw, an internal hexagon backing-up screw, a bidirectional tightening nut, a model angle changing system and an air supply pump. When the wind tunnel model is floated, air floatation force measuring test of transformation of angle of attack and angle of the sideslip of the wind tunnel model can be realized. When the ratio of the elevating force and the resistance is greater, and the elevating force generates greater interference for the resistance measurement, dynamic and statistic high-precision measurement can be achieved.
Owner:中国航空工业空气动力研究院
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