71 results about "Biomechanical testing" patented technology

A system that applies vibration to a desired region of a human body comprising a plurality of vibratory stimulators installed in a flexible material; a programmable control unit (PCU) connected to each said vibratory stimulator a plurality of sensors to collect biofeedback data; a set of programs for the operation of the PCU; a biomechanical database stored in a computer and being populated by the biomechanical data collected by the sensors after application of each said predefined pattern of vibration; and an algorithm to analyze and rank said patterns of vibration according to a ranking factor, wherein a user can choose a pattern of vibration that has a higher ranking factor.

The invention discloses a magnesium alloy/biological ceramic bone bracket based on photocuring and gel casting and a forming method of the bone bracket. The method comprises the following steps of: establishing computer-aided design (CAD) models of the bracket and a bracket negative model through shape correlation and microstructure simulation by using reverse engineering and CAD according to the structures of different bone defect parts and the analysis results of biomechanics; making a resin bracket negative model by a photocuring technology; filling ceramic slurry into the bracket negative model by a gel casting process, curing and sintering at a high temperature to make a biological activity ceramic framework with mutually-communicated porous pipelines; and casting molten magnesium alloy into the porous pipelines of the biological activity ceramic framework by a vacuum suction casting method, cooling for solidification, and thus obtaining the magnesium alloy/biological ceramic simulation composite structure bone bracket. The internal microstructure of the made bracket consists of the mutually-communicated pipelines, the magnesium alloy is filled in the pipelines to increase the early mechanical property of the composite bracket, and the pipelines filled with the magnesium alloy become mutually-communicated pore passages as the magnesium alloy is corroded and degraded, so that the requirements of organization growth, nutrition and metabolism are met.

Described is a system for online characterization of biomechanical and cognitive factors relevant to physical rehabilitation and training efforts. A biosensing subsystem senses biomechanical states of a user based on the output of sensors and generates a set of biomechanical data. The set of biomechanical data is transmitted in real-time to an analytics subsystem. The set of biomechanical data is analyzed by the analytics subsystem, and control guidance is sent through a real-time control interface to adjust the user's motions. In one aspect control guidance is sent to a robotic exoskeleton worn by the user to adjust the user's motions.

For soft tissue deformation prediction, a biomechanical or other tissue-related physics model is used to find an instantaneous state of the soft tissue. A machine-learned artificial neural network isapplied to predict the position of volumetric elements (e.g., mesh node) from the instantaneous state. Since the machine-learned artificial neural network may predict quickly (e.g., in a second or less), the soft tissue position at different times or a further time given the instantaneous state is provided in real-time without the minutes of physics model computation. For example, a real-time, biomechanical solver is provided, allowing interaction with the soft tissue model, while still getting accurate results. The accuracy allows for generating images of a soft tissue with greater accuracy and/or the benefit of user interaction in real-time.

The invention relates to a device for measuring overall mechanical characteristics of an eyeball of a living animal, and a method of the device. The device is characterized in that a movable camera and a glass tube are fixed on a lifting support; the end of the glass tube is communicated with a hose and an infusion syringe; and a stop valve and a horizontal operating platform for injecting to the eyeball of the living animal are arranged on the infusion syringe. The method comprises the steps of communicating internal and external testing devices of the eyeball in a puncture injection manner for the eyeball of the experimental animal according to a communicator principle, and calculating to obtain the overall biomechanical characteristics of the eyeball, such as rigidity and elastic modulus by changing a liquid level of the external testing device. With the adoption of the device and the method, accurate measurement of a biomechanical characteristic carrier of the eyeball of the experimental animal is realized, the detectability of influence of ocular diseases and drugs on the biomechanical characteristics of the eyeball, and theoretical data is provided for selecting LASK (Laser Assisted In-situ Keratomi) operation parameters.

A system configured to generate a motion adjustment instruction for a user performing an action is provided. The system comprises: a target module configured to obtain a target biomechanical load distribution for the user, a sensor arrangement configured to monitor the motion of the user so as to obtain monitored motion data, a monitoring module configured to calculate a monitored biomechanical load distribution for the user in accordance with the monitored motion data, an adjustment module configured to calculate a target adjustment to the motion of the user that corresponds to a reduction of a deviation of the monitored biomechanical load distribution from the target biomechanical load distribution, and an instruction module configured to generate a motion adjustment instruction in accordance with the target adjustment.

Methods for biomechanical mapping of the female pelvic floor may include the steps of inserting a vaginal tactile imaging probe into vagina; recording tactile responses for vaginal walls during vaginal wall deformation by moving a probe as well as dynamic pressure patterns during voluntary or involuntary muscle contractions in multiple test procedures; followed by calculating multiple biomechanical parameters characterizing vaginal tissue elasticity, pelvic support structures and dynamic pelvic functions. Individual biomechanical parameters may be visually represented by positioning their value within the established physiological parameter ranges varying from normal to diseased conditions. The methods may be used for identification of pelvic floor tissues with low elasticity, deteriorated or damaged pelvic support muscles and ligaments, and muscles with low contractive capability. Other methods include the steps of collecting clinical history and completing gynecological examinations of the pelvic floor and calculating probabilities of treatment success for pelvic diseases depending on a proposed treatment using a predictive mathematical model.

The invention discloses a clamp for assisting a mechanical arm-universal sensor testing system in realizing a knee joint biomechanical test. The clamp consists of a tibia shaft fixing mechanism and a femur shaft fixing mechanism; and a knee joint specimen is connected between the tibia shaft fixing mechanism and the femur shaft fixing mechanism. An upper bottom plate (2) is arranged between a supporting (1) and an upper clamping piece (3), and a knee joint tibia is fixed by the upper clamping piece (3). A lower bottom plate (12) is arranged between a lower clamping piece (11) and a lower base (13), and a knee joint femur is fixed by the lower clamping piece (11). A top block is pushed by a squeezing screw, so that the upper bottom plate (2) and the lower bottom plate (12) are pushed, an oblique movement sliding groove panel on the side of each bottom plate and an oblique movement sliding groove panel of a wedge block are superposed to form right-angle intersected inclined grooves to be occluded, the problem about the measuring position precision during repeated mounting and dismounting of the knee joint specimen is solved, and biomechanical tests of the knee joint specimen under different states are completed.

The present invention discloses a tilting controller that measures foot-related human biomechanical data. The tilting controller for measuring foot-related human biomechanical data includes a mechanism having a foot hold on which a rear foot portion is placed, and a control module that tilts the foot hold by controlling the mechanism portion.

The invention discloses a soft tissue modeling method based on position constraint and a nonlinear spring. The method comprises the following steps: (1) constructing a soft tissue model formed by tetrahedron units formed by the nonlinear spring and a virtual body spring; (2) simulating the deformation behavior of the soft tissue model; (3) estimating the approximate position of each node, judging whether the state of a node constraint equation is changed or not, wherein constraints comprise spring length and curvature constraints; if the initial state of the equation is changed, correcting the node to a correct position within a reasonable range; if the initial state of the equation is not changed, indicating that the nonlinear spring and the virtual body spring simulate the deformation effect of the soft tissue; and (4) ending the single-step iteration of deformation calculation, and entering the next cycle. The non-linear spring system and the virtual body spring are adopted to simulate the biomechanical characteristics of the soft tissue, a new constraint equation is adopted to limit node displacement so as to enhance the stability of the model, and the defects that a traditional mass spring model is poor in accuracy and unstable are overcome.

The invention relates to a bionic bone sample for terahertz in-situ impact testing and a preparation method thereof, and belongs to the field of biomechanical testing. The bionic bone sample consisting of bionic skins, muscles and bones is constructed with a outside-to-inside topological structure. The bionic bones with porous gradient characteristics are prepared; the bionic muscle with similar mechanical properties to the natural biological muscles is attached to the outer layer of the bionic bone, and the outer layer of the muscle is wrapped with artificial skin, so as to prepare the bionicbone sample simulating a whole biological limb structure. Membrane pressure sensors are embedded in various components of the bionic bone sample, thus implementing all-directional, multi-level and stereoscopic detection on the values of the impact force on the various components of the bionic bone sample. The bionic bone sample can replace the natural bone for impact performance experiments and can integrate a variety of new detection methods, so that an effective tool is provided for biomaterial impact performance testing, and a new study means is provided for the study on the impact failuremechanism of biomimetic material instruments including bionic limbs, implanted bionic bones and the like.

The present invention relates to a sensor for non-invasive optoacoustic measurements of biomechanical and/or morphological features of skin and/or other tissue.

The invention discloses a ligament biomechanics test system which mainly comprises a base and clamps, the base is an L-shaped aluminum alloy mesh plate, a group of fixed clamps and a group of adjustable clamps are mounted on the base, and the fixed clamps are fixed; a sliding rail is installed on the surface of the longitudinal section of the base, a sliding block is installed on the sliding railin a sliding mode, an electronic tension meter and a displacement sensor are fixedly installed on the sliding block, a hook is arranged at one end of the electronic tension meter, and the hook is connected with a measured object on the fixed clamp through a pull wire; and a constant hydraulic thruster is installed between the sliding rail and the clamp, and a push rod of the constant hydraulic thruster is attached to the sliding block and pushes the sliding block to move. The system has the advantages of ingenious structure, convenience in use and the like.

The invention discloses a gait analysis system and method for calculating joint torque and angle by using an inertial sensor. The system comprises the inertial sensor and a calculation unit which are worn on a testee; the inertial sensor is used for measuring acceleration and gyroscope data, and the calculation unit uses a deep learning network to calculate a joint angle, a ground reaction force and a joint torque. Data are obtained through the inertial sensor worn on a testee, gait information such as ground reaction force, joint angles and joint torques can be calculated in real time by using technologies such as a deep neural network, and meanwhile the system has the advantages of being low in cost, high in precision, portable, efficient and the like and has wide application prospects. The gait characteristic of a testee can be conveniently analyzed, exercise evaluation is carried out, exercise training is guided, and therefore the method has good application prospects and economic benefits in the fields of medical rehabilitation, biomechanics, exercise science and the like.

The invention discloses a manufacturing method of an orthopedic insole based on lower limb biomechanical parameter evaluation, which is characterized by comprising the following steps: S1, evaluating lower limb biomechanical parameters of a user; s2, sole mechanical analysis scanning is carried out, and dynamic and static test data of foot pressure are obtained; s3, lower limb biomechanical parameters and static and dynamic data of foot pressure are collected, and the orthopedic insole is manufactured based on 3D printing equipment. The lower limb biomechanical parameter evaluation system is high in integrity and pertinence and is used for customizing orthopedic insoles and enhancing the orthopedic effect.