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44 results about "Force platform" patented technology
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Force platforms or force plates are measuring instruments that measure the ground reaction forces generated by a body standing on or moving across them, to quantify balance, gait and other parameters of biomechanics. Most common areas of application are medicine and sports.
A vibration comfort evaluation platform for pedestrian bridges considering human-bridge interaction
The present invention discloses a pedestrian bridge vibration comfort assessment platform that takes into account human-bridge interaction. The platform comprises a self-powered sensing vibration force measurement platform and an analysis and control system. The self-powered sensing vibration force measurement platform includes multiple self-powered sensing force platforms and servo-controlled motors. The self-powered sensing force platforms are densely packed with friction nanogenerator self-powered three-dimensional force measurement blocks. The analysis and control system comprises three modules: data acquisition, feedback control, and data output. The modules collect the three-dimensional pedestrian load on the self-powered sensing vibration force measurement platform in real time, calculate the bridge dynamic response based on a finite element model of the pedestrian bridge, and then feedback-control the vibration state of the self-powered sensing vibration force measurement platform to simulate the actual bridge vibration. Finally, the bridge vibration comfort is assessed based on the dynamic response characteristics of the bridge throughout the loading process. The present invention enables real-time interaction between a computer and the self-powered sensing vibration force measurement platform, reducing sensing energy consumption while obtaining pedestrian bridge vibration comfort assessment results that are closer to reality.
Owner:ZHEJIANG UNIV
Method and device for identifying motion time of surface myoelectric signal, equipment and medium
The application discloses a method, device and equipment for identifying a movement time point of a surface electromyogram signal and a medium. The method comprises the following steps: acquiring a to-be-detected force platform signal corresponding to a to-be-detected surface electromyogram signal; wherein the acquisition time points of the to-be-detected surface electromyogram signal and the to-be-detected force platform signal are synchronous; determining a positive slope cumulative function according to the to-be-detected force platform signal, and performing first-order derivation on the positive slope cumulative function to obtain a positive slope change rate function; determining a movement time point of a movement event corresponding to the to-be-detected surface electromyogram signal according to the positive slope change rate function and a movement change rate threshold; wherein the independent variable and the dependent variable of the positive slope cumulative function are the acquisition time point of the to-be-detected force platform signal and the cumulative positive slope respectively, and the movement time point is a starting time point or an ending time point. The embodiment of the application solves the problem that the traditional identification method is susceptible to noise interference of the surface electromyogram signal, and improves the identification accuracy of the movement time point.
Owner:SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
Force platform leveling control method and system, electronic device and storage medium
ActiveCN120891848BMachine framesNavigation by speed/acceleration measurementsGlass fiberFoot cushion
The present application relates to the technical field of force measuring platform, and discloses a force measuring platform leveling control method, system, electronic equipment and storage medium, the method comprises the following steps: obtaining the force value of the adjustable foot pad of the force measuring platform body structure and the force value of the three fixed foot pads; obtaining the inclination angle value collected by the IMU sensor arranged at the geometric center of the force measuring platform and the height value of the adjustable foot pad collected by the grating ruler sensor; calculating the height adjustment value of the adjustable foot pad and performing leveling control; wherein the center area of the upper plate of the force measuring platform body structure is provided with a main hole area, a honeycomb array is arranged in the main hole area, and the honeycomb hole is filled with glass fiber. The present application can solve the problems of low efficiency, poor precision and high cost of traditional leveling. At the same time, the honeycomb array and glass fiber filling design of the force measuring platform not only realize weight reduction and facilitate carrying, but also reduce the attenuation of the Bluetooth signal, improve the transmission performance, and ensure the measurement accuracy and use flexibility in high-precision and dynamic scenarios.
Owner:BEIJING SPORT UNIV
A portable, detachable intelligent electric wheelchair
The application discloses a portable and detachable intelligent electric wheelchair, which comprises a power platform, drive wheels are installed at both ends of one side of the power platform, supporting rollers are installed at both ends of the other side of the power platform, an operation rudder is arranged upwards at the front side of the power platform, throttle handles are arranged at the upper ends of the operation rudder, a mounting groove is arranged downwards at the rear of the power platform; the application further comprises a seat platform, a backrest plate is rotatably connected to the rear side of the seat platform, a first supporting inclined rod and a second supporting inclined rod are rotatably connected to the lower end of the rear of the seat platform, a parallel pull rod is rotatably connected between the first supporting inclined rod and the second supporting inclined rod, supporting connecting sleeves are arranged at both ends of the lower sides of the first supporting inclined rod and the second supporting inclined rod, and the power platform is provided with a plurality of electromagnetic locks which are used for one-to-one corresponding connection with the supporting connecting sleeves. The application can be switched between the electric wheelchair and the balance car, and can provide a fashionable and practical travel option for young people.
Owner:HUNAN UNIVERSITY SUZHOU INSTITUTE +1
A lower limb muscle strength prediction and balance function evaluation method based on fusion of plantar pressure and spatial pose
The application provides a lower limb muscle strength prediction and balance function evaluation method based on plantar pressure and spatial pose fusion, comprising: collecting plantar pressure data, lower limb spatial pose data and human individual physiological parameters of a subject, and combining a force platform to obtain ground reaction force data; real lower limb muscle strength is calculated by using inverse dynamics and Hill muscle model, and a plantar pressure + spatial pose-lower limb muscle strength data set is constructed; the optimal sensor quantity and layout are obtained by combining a heuristic optimization algorithm and a machine learning regression model, taking prediction accuracy and information redundancy as indexes; a deep forest model is trained based on fusion features, real-time prediction of hip joint, knee joint and ankle core muscle group muscle strength is realized; further, muscle strength symmetry analysis, weak muscle group identification and hip-knee-ankle force ratio analysis are completed, and multi-dimensional quantitative evaluation of balance function is completed. The method can realize high-precision lower limb muscle strength prediction under limited sample conditions, and output multi-dimensional balance function evaluation results.
Owner:BEIHANG UNIV
Adjustable multidirectional slope angle three-dimensional force measuring system based on force measuring table
The invention relates to the technical field of human motion scientific experiment testing, and discloses a three-dimensional force measuring system capable of adjusting a multidirectional slope angle based on a force measuring platform, which comprises a protective jumping platform module, a force measuring platform module and a multidirectional slope angle adjusting device, the protection diving platform module is fixed to the ground, the multidirectional slope angle adjusting device is arranged in the protection diving platform module, and the force measuring platform module is arranged on the upper surface of the multidirectional slope angle adjusting device. The multidirectional slope angle adjusting device adjusts the slope angle in any direction in a three-dimensional space by adjusting the lengths of a plurality of telescopic push rod devices; the force measuring table module is used for collecting three-dimensional force, torque and pressure center data when a human body lands, multi-directional slope angles of the force measuring table module can be adjusted at will, and the typical slope environment encountered in the real parachute landing condition is accurately simulated.
Owner:NORTHWESTERN POLYTECHNICAL UNIV
Vestibular and oculomotor assessment utilizing videonystagmography data and posturography data
Assessing function of vestibular and oculomotor systems based on data output by a videonystagmography system and a force platform. A system includes a videonystagmography headset comprising an image sensor, wherein the image sensor outputs a video stream comprising a plurality of images of eyes of a user captured when the user wears the videonystagmography headset for a gaze test duration. The system includes a force platform comprising a load cell, wherein the force platform outputs a data stream indicating a plurality of tilt positions of the force platform captured when the user stands on the force platform for a balance test duration.
Owner:COGNURO LLC
Method for calculating counter-acting force borne by human body in sitting posture kicking training process
PendingCN120690377APhysical therapies and activitiesDesign optimisation/simulationHuman bodyLower extremity joint
The invention relates to the field of biomedical engineering, in particular to a method for calculating counter-acting force borne by a human body in the sitting posture kicking training process, and provides a method for calculating counter-acting force based on human body dynamics modeling and the counter weight motion state of a fixing instrument. In order to avoid the use of a traditional three-dimensional dynamometer, the invention provides a novel counter-acting force calculation method for a fixed instrument sitting posture kicking trainer, the method applies a human body dynamics modeling method, and the counter-acting force is calculated by collecting the movement state of a counter weight in the movement process. Human body and outside interaction force in the training process is obtained by combining a human body lower limb dynamic model. The method comprises the following steps: step 1, measuring lower limb parameters of a trainee; 2, according to the lower limb parameters of the trainee, the lower limb joint angle of the trainee in the sitting posture kicking training process is calculated; and step 3, according to the lower limb joint angle of the trainee, calculating the counter-acting force applied to the lower limbs of the trainee in the sitting posture kicking training process.
Owner:SHENYANG UNIVERSITY OF TECHNOLOGY
Safe and efficient bridge demolition double-layer operation platform
Owner:JIANGXI HIGHWAY ENGINEERING SUPERVISION CO LTD
Force platform system useable in an item of footwear to measure the weight and pressure exerted by the foot of a patient
A device for measuring a bearing force exerted by the foot of a patient, the device including: a shell; an inner sole that is intended to support the foot of the patient and that is held in the shell, the shell and the sole being arranged so that, when the foot of the patient is bearing against the inner sole, the forces exerted by the foot of the patient on the inner sole are transmitted to the shell in a limited number of contact regions; sensors that are interposed between the shell and the inner sole in the contact regions, respectively, and that are each configured to deliver a signal representative of a force exerted on the corresponding contact region; and a processing unit connected to the sensors and configured to acquire the force signals delivered by the sensors.
Owner:FLUID INNOV
Method for evaluating micro-vibration suppression performance of reaction wheel vibration isolator
The invention discloses a reaction wheel vibration isolator micro-vibration suppression performance evaluation method, which comprises the following steps of: installing a reaction wheel simulation piece and a vibration isolator on a three-way vibration table, setting a plurality of amplitude sweep frequencies, collecting an acceleration signal and calculating a suppression ratio through FFT (Fast Fourier Transform); building a six-component force measuring table, measuring six-direction disturbance before and after vibration isolation, and calculating power spectrum density, frequency-band integration and a comprehensive inhibition ratio; and the micro-vibration suppression performance of the vibration isolator is evaluated by integrating the results and combining a satellite cabin transfer function. The method adapts to an on-satellite micro-vibration environment, can be associated with load indexes, and can also be popularized to evaluation of other on-satellite disturbance sources such as control moment gyroscopes and acceptance and optimization of power-assisted vibration isolator products.
Owner:INNOVATION ACAD FOR MICROSATELLITES OF CAS +2
Human body mechanics state evaluation system and method based on integrated double-sensing force-measuring table
The invention discloses a human body mechanics state evaluation system and method based on an integrated dual-sensing dynamometer. The system comprises a multi-modal heterogeneous sensing fusion dynamometer platform, a data acquisition synchronization module and an upper computer, wherein the upper computer is internally provided with a data fusion processing module and a result generation module; the multi-mode heterogeneous sensing fusion force measuring platform is built by fixing pressure sensors on corresponding six-dimensional force measuring plates to form a stacked structure. The fusion processing module acquires fusion data by picking up six-dimensional force data and plantar pressure distribution data; and the result generation module is used for extracting the multi-modal biomechanical characteristics from the fused data and generating a human body biomechanical state evaluation report. According to the invention, through hardware integration and high-precision synchronous acquisition, plantar pressure and six-dimensional force data are fused, and accurate plantar shear force data are analyzed in combination with space-time registration, physical verification and reverse estimation, so that multi-dimensional features are extracted, and intelligent and quantitative evaluation of features such as a balance function, gait abnormality and a foot pathological state is realized.
Owner:NANJING BIO INSPIRED INTELLIGENT TECH
Non-support rapid construction method for rotational flow well in limited space of slow hill landform
The invention relates to a support-free rapid construction method for a rotational flow well in a slow hill landform limited space, which comprises the following steps of: arranging a closed ring beam which is also used as a permanent structure and a construction conversion carrier at a preset depth above a design base of the rotational flow well, and modularly combining a heavy excavation method, a reverse construction method and a sequential construction method in a vertical space; an upper soil body and an adjacent building structure are constructed synchronously in a two-stage sloping mode, a lower rock body is formed in a segmented and reverse mode with the ring beam as a counter-force platform, a middle shaft is formed in a segmented and sequential mode with the ring beam as a built-in end, an additional supporting system is omitted in the whole process, and supporting-free, zero-interference, low-cost and rapid construction is achieved.
Owner:SHANGHAI BAOYE GRP CORP
Force measuring platform
1. Name of the product in this design: Force measuring platform. 2. Purpose of this design: To construct the overall structure of a force measuring instrument, which is used to test clamping force and expansion force. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: 3D view 1.
Owner:SHANDONG HAOMING PRECISION IND CO LTD
A three-axis force measuring mechanism, an upper limb rehabilitation robot system and a control method
ActiveCN114459661BGymnastic exercisingApparatus for force/torque/work measurementUpper limb rehabilitationSupport plane
The application discloses a three-axis force measuring mechanism, an upper limb rehabilitation robot system and a control method. The three-axis force measuring mechanism comprises a Z-axis force measuring mechanism arranged on a bottom plate of the upper limb rehabilitation robot. An upper end of the Z-axis force measuring mechanism is provided with an X-Y composite force measuring mechanism. The force transmission rod is located directly above the center of the bottom plate. The Z-axis force measuring rod is at least partially exposed to the force transmission platform. The length of the Z-axis force measuring rod is 10-20 cm. The spacing between the Z-axis support frame and the center of the bottom plate is 15-25 cm. The test torque is amplified by a long force arm after a slight force change. Then, the test torque is converted into force data. The test precision is improved. Meanwhile, the internal structure is more compact.
Owner:XIAMEN WEIEN TECH CO LTD
Force platform system usable in footwear for measuring the weight and pressure exerted by a patient's foot
Owner:FLUID INNOV
Device for testing bonding effect of glued diaphragm and pole piece
PendingCN120992482AMaterial strength using tensile/compressive forcesUsing mechanical meansPole pieceMachine press
The invention discloses a gluing diaphragm and pole piece bonding effect testing device, which comprises an upper pressing support assembly, a lower pressing assembly and a platform control assembly, and is characterized in that the upper pressing support assembly is used for supporting a prefabricated body participating in a test; the downward pressing assembly follows the press machine and applies downward pressure to the prefabricated body supported by the upward pressing supporting assembly; the platform control assembly regulates and controls the upper pressing supporting assembly to support the prefabricated body through the shaft connecting assembly and fixes the position of the prefabricated body. According to the invention, the gluing diaphragms and the pole piece preforms are used as test workpieces to be placed on the upper pressing support assembly, centering and clamping of the workpieces can be controlled through the servo control mobile platform according to the gluing diaphragms and the pole piece preforms with different models and sizes, and the lower pressing assembly applies pressure downwards; the yield force value of the glued diaphragm and the pole piece preform is tested, the bonding effect of the glued diaphragm and the pole piece is tested, and a test basis is provided for optimization of a battery cell manufacturing process.
Owner:HEFEI GUOXUAN HIGH TECH POWER ENERGY
Vestibular and oculomotor assessment utilizing videonystagmography data and posturography data
PCT designated stageWO2026006631A1Input/output for user-computer interactionMedical data miningData streamEngineering
Assessing function of vestibular and oculomotor systems based on data output by a videonystagmography system and a force platform. A system includes a videonystagmography headset comprising an image sensor, wherein the image sensor outputs a video stream comprising a plurality of images of eyes of a user captured when the user wears the videonystagmography headset for a gaze test duration. The system includes a force platform comprising a load cell, wherein the force platform outputs a data stream indicating a plurality of tilt positions of the force platform captured when the user stands on the force platform for a balance test duration.
Owner:COGNURO LLC
Six-dimensional force measuring platform calibration equipment
ActiveCN224122095UReduce the impact of loading accuracyHigh loading accuracyMeasurement of force componentsForce/torque/work measurement apparatus calibration/testingFriction forcePulley
The utility model relates to the technical field of force measuring platforms, in particular to six-dimensional force measuring platform calibration equipment, which comprises a frame, a normal loading frame, a lateral loading frame and a force measuring platform clamp, and is characterized in that the normal loading frame is positioned at the upper part of the six-dimensional force measuring platform calibration equipment and is used for realizing calibration of normal force; the lateral loading frame is located on the left side of the six-dimensional force measuring platform calibration device and used for achieving calibration of lateral force, the force measuring platform is fixedly clamped on the force measuring platform clamp, and the top of the force measuring platform is fixedly connected with the normal loading frame through the normal loading clamp. According to the six-dimensional force measuring platform calibration equipment, the influence of the friction force of the pulleys on the loading precision is reduced. The normal loading frame can realize calibration of normal force, and the two lateral loading frames are respectively used for horizontal X-direction and Y-direction force transmission and are matched with a plurality of standard sensors to carry out loading at different positions, so that the actual stress condition can be more accurately simulated, the calibration precision of six-dimensional force is effectively improved, and the requirements of various industries on high-precision measurement can be met.
Owner:NANJING SHUZHI MICRO-SENSING TECH CO LTD
Vertical force measuring device
PendingCN121026398AFluid pressure measurementApparatus for force/torque/work measurementStructural stabilityTest board
The invention provides a vertical force measuring device, and aims to solve the problems of large occupied area, inconvenience in operation and insufficient structural stability of a force measuring platform in the prior art. The vertical force measuring device comprises a supporting frame, a testing plate, a testing head and a sensor. The whole device is of a vertical structure and is provided with a top and a bottom which are opposite in the longitudinal direction. The supporting frame extends in the longitudinal direction of the device. And the test plate extends along the transverse direction of the device and is connected with the support frame. The testing head and the testing plate are arranged at an interval along the longitudinal direction, and the testing head is positioned below the testing plate. The sensor is used for detecting the longitudinal force applied by the to-be-tested object to the testing head. By adopting a vertical structure, the occupied area of the equipment is obviously reduced, and the operation convenience is improved; meanwhile, the structural stress of the force measuring device is more reasonable, and the measurement accuracy and safety of the object to be measured are improved.
Owner:SHANDONG HAOMING PRECISION IND CO LTD
A shock absorbing structure for a marine rescue transfer device
The utility model relates to offshore rescue transfer device damping structure technical field provides a kind of damping structure for offshore rescue transfer device, wherein, multidirectional force support platform is fixedly connected by connecting screw and plug post, plug post is slidably connected with support sleeve and base respectively, elastic element is arranged between plug post and support sleeve, support sleeve is fixedly connected with base, multidirectional force support platform includes: installation support platform, multidirectional force platform, lateral pad and bottom pad, bottom pad is arranged between the bottom of multidirectional force platform and installation support platform, lateral pad is arranged between the side of multidirectional force platform and installation support platform, installation hole is arranged on the upper portion of multidirectional force platform center, multidirectional force taper hole is arranged in the lower portion of multidirectional force platform center, multidirectional force platform can be inclined along installation hole axis under the action of multidirectional force taper hole, and then lateral force is cancelled, the utility model is reasonable in structure, convenient to use, can significantly reduce the jolt brought by lateral force, improve safety factor.
Owner:天津医舸科技有限公司
Assembly type subway station rail top air duct separation type assembly operation equipment
The utility model relates to the technical field of rail traffic construction, and discloses assembly type subway station rail top air duct separation type assembly operation equipment which comprises two sets of supporting frames, a force transmission platform is arranged between the two sets of supporting frames, a steel wire rope is arranged above the supporting frames, a chain block is arranged on the steel wire rope, and the steel wire rope is connected with the chain block. A lifting device is changed from the lower portion of the middle plate to the upper portion of the middle plate, the middle plate lower operation platform and the middle plate upper lifting device are matched with each other to complete splicing of an air duct, precision control of the lower portion and lifting control of the upper portion, and the lifting device is arranged on the middle plate. And therefore, the assembly efficiency and the assembly precision are improved.
Owner:THE SECOND CONSTR BRANCH OF QINGDAO METRO GRP CO LTD +2
Air bag polishing machine force monitoring and collecting device and design method
ActiveCN118875886BOptical surface grinding machinesGrinding feed controlData acquisitionControl engineering
A kind of air bag polishing machine force monitoring acquisition device and design method, it is related to complex curved surface optical element high-precision polishing.The device includes force platform, S type force sensing unit, support platform, multi-channel conditioning box, force gauge and data acquisition card;Support platform is fixed on air bag polishing machine workbench;S type force sensing unit is fixed between force platform and support platform, and its fixed position and distribution are obtained by finite element software simulation according to response surface optimization method and quasi-newton method.Multi-channel conditioning box is connected with S type force sensing unit, and is connected with force gauge through signal line.Data acquisition card is connected with force gauge.Through data acquisition card, voltage signal is converted into actual force value, and is processed as compensation by Labview program, and the compensation value is transmitted to machine tool numerical control system by communication program, and the air bag is real-time compensated.The normal force of polishing is stabilized at set value, and the compensation and constant force control of polishing force are realized.
Owner:XIAMEN UNIV
Parkinson's disease patient motion data analysis method based on six-dimensional motion counterforce signals
The invention discloses a Parkinson's disease patient motion data analysis method based on a six-dimensional motion counterforce signal. The method comprises the following steps: S1, collecting the six-dimensional motion counterforce signal; s2, sequentially performing denoising, gait cycle segmentation and normalization processing on the six-dimensional motion counter-force signal to obtain at least one piece of complete gait cycle data; s3, feature parameters are extracted from each gait cycle data, and the feature parameters comprise time domain features, frequency domain features and gait parameters; s4, based on a motion function evaluation model, performing training based on clinical UPDRS scores and historical data; inputting characteristic parameters, and outputting an evaluation result; the evaluation result at least comprises a motion function score, an abnormal gait recognition result and disease risk level early warning. The six-dimensional force data in the gait process of the patient is collected through the six-dimensional force measuring table, quantitative evaluation of the movement function of the patient is achieved in combination with the feature parameter extraction and data analysis model, and clinical illness state judgment or early screening is assisted.
Owner:NANJING BIO INSPIRED INTELLIGENT TECH
Gait analysis method and system based on imu and convolutional neural network with kinematic constraints
The application discloses a gait analysis method and system based on an IMU and a kinematic constraint convolutional neural network, and relates to the technical field of gait biomechanics analysis. The method is characterized in that IMU sensors are arranged at the positions of human feet, shanks, thighs and sacrum of a trunk, a convolutional neural network is constructed, distances from the sensors to joint axes and limb segment centroid positioning are adaptively estimated in combination with static human body parameters of a subject, then gait energy estimation is performed to realize gait analysis, and gait modes such as normal walking, obstacle crossing, walking on a sandy ground, going upstairs and going downstairs can be distinguished through coupling relationships among different energies. The gait analysis method and system based on the IMU and the kinematic constraint convolutional neural network can reduce system errors caused by position deviation of sensor wearing, is suitable for rehabilitation evaluation, motion function monitoring, auxiliary identification of abnormal gait and continuous gait energy analysis in a daily environment, and does not need to depend on an optical motion capture system and a force platform.
Owner:FUZHOU UNIV
A method and device for full machine drop test of a large anti-tumble angle aircraft prototype
The application discloses a kind of big anti-reverse angle aircraft principle prototype whole machine drop test method and device, specifically relates to a kind of method and test device for achieving principle prototype in drop test with original aircraft landing dynamic process time consistent.In the basis that small size principle prototype can be realized lifting and releasing, cooperate with the loading method of scaled gravity acceleration and the application method of air power, the dynamic response of the time period of main landing gear landing to front landing gear landing in principle prototype landing process can be realized equivalent simulation, to realize the whole machine drop test under limited field.The technical scheme of the application is: including lifting and releasing device, scaled gravity acceleration applying device, air power applying device and force platform;The application can realize the consistency of small size principle prototype in the time period of main landing gear landing to front landing gear landing with original aircraft.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
A prestressed cable tensioning construction control system
A kind of prestressed anchor cable tensioning construction control system, the present application relates to engineering prestressed construction technical field, it includes concrete support structure platform, anchoring tensioning equipment and anchoring system;Concrete support structure platform is embedded in slope, anchoring system is inserted in concrete support structure platform and slope, and anchoring system is connected with anchoring tensioning equipment, and anchoring tensioning equipment is set on concrete support structure platform.Concrete support structure platform provides the space required for anchoring tensioning, prefabricated cushion pier provides force platform for anchoring tensioning, plays the role of pressure bearing, cushion is arranged between anchoring tensioning equipment and cushion pier, plays the role of buffer, above-mentioned structure provides convenience for anchoring tensioning operation, to increase construction efficiency.
Owner:LANZHOU UNIVERSITY OF TECHNOLOGY
Multi-degree-of-freedom displacement monitoring system and method
The invention relates to the technical field of structural safety monitoring, and discloses a multi-degree-of-freedom displacement monitoring system which comprises a six-degree-of-freedom loading platform which is of a Stewart structure and comprises a counter-force platform, a loading platform body and six actuators. The displacement sensor group comprises six LVDT (Linear Variable Differential Transformer) ejector rod type displacement meters which are respectively connected between the loading beam and the ground beam through spherical hinges; the data acquisition module is used for acquiring analog signals of the six LVDTs in real time and converting the analog signals into digital signals; and the coordinate conversion module is used for converting the elongation of the six LVDTs into six-degree-of-freedom displacement of a test piece control point based on an incremental kinematics transformation method. The monitoring system is compact in structure, convenient to install, high in universality and suitable for six-degree-of-freedom loading tests of various complex structures such as bridges, pier columns and cylinders, and reliable technical support is provided for structure mixing tests and quasi-static tests.
Owner:ANHUI INST OF BUILDING RES & DESIGN
A test device for realizing compression-bending boundary conditions under axial impact
The present invention relates to the technical field of building structure testing, specifically a device for testing compression-bending boundary conditions under axial impact. The device comprises a test platform, a compression-bending assembly, an axial loading assembly, a drop hammer, and a vertically arranged test specimen. The test platform includes a top reaction platform and a bottom reaction platform. The compression-bending assembly comprises a lower loading plate fixed to the upper surface of the bottom reaction platform, a lower hinged plate, an upper hinged plate, an upper loading plate, a lower roller, and an upper roller. The lower hinged plate is hinged to the lower loading plate via the lower roller. An axial loading assembly is disposed between the upper loading plate and the top reaction platform. The upper hinged plate is hinged to the upper loading plate via the upper roller. The test specimen is positioned between the upper hinged plate and the lower hinged plate, with the specimen axis offset from the axis of the upper roller and / or the lower roller, such that the specimen withstands an offset axial load applied by the axial loading assembly. The device has a simple structure and is easy to implement.
Owner:SHANXI ERJIAN GRP CO LTD +1
Testing device and testing method for testing performance of single leg of slow landing system
The invention discloses a test device and a test method for a single-leg performance test of a landing slow descent system, and belongs to the technical field of spacecraft ground tests. The test device comprises a test bed, and an energy storage release system and a test main body capable of moving along the height direction of the test bed are arranged on the test bed; the stored energy release system is used for storing potential energy and controlling to release the test main body; the test main body comprises an unlocking release system and a landing buffer device, the unlocking release system unlocks and releases the landing buffer device at a preset height after the energy storage release system releases the test main body, so that the landing buffer device continues to freely fall; the force measuring platform system is used for receiving the impact of the landing buffer device; according to the technical scheme, a traditional passive triggering mechanism is replaced, accurate and timed release at the preset height is achieved, the impact and disturbance in the unlocking process are small, and the real motion state of the landing buffering device under the free falling body is reserved to the maximum extent.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS +1