375results about "Artificial hands" patented technology

The utility model discloses a tactile extremity structure and an artificial limb. The tactile extremity structure comprises a limb back structure; the limb abdomen structure is arranged on the limb back structure; the sensor is located between the limb back structure and the limb abdomen structure; the sensing target is arranged on the limb and abdomen structure; when the limb and abdomen structure deforms in a contact mode, the sensing target is driven to move and is sensed by the sensor. The sensor is located between the limb back structure and the limb belly structure, the sensing target is located on the limb belly structure and corresponds to the sensor in position, when the limb belly structure makes contact with other objects and deforms, the sensing target moves, the back sensor senses the movement, and therefore the limb end structure has touch sense and can sense contact. And the tactile extremity structure has a better simulation effect.

A prosthetic assistive device configured to attach to a distal end of a natural or prosthetic arm or wrist. The device may include a palm portion. A split hook may be coupled to a distal end of the palm portion. The split hook may comprise a first end effector and a second end effector. The prosthetic device may include a third end effector rotatably coupled to the palm portion at a proximal end of the palm portion. The third end effector may rotate about a transverse axis to pinch and unpinch, as well as rotate about a longitudinal axis to adduct and abduct. A rotating member such as a ring may rotate about a plate for adduction / abduction. The prosthetic device may include a drive assembly configured to rotate one or both of the split hook end effectors about two different axes.

The present disclosure relates to the field of artificial limbs for amputees and specifically to a passive compliant wrist unit 210 for upper limb prosthesis. The passive compliant can comprise a plurality of fingers controlled by a compliant four bar mechanism. The arm is capable of extension / flexion, radial / ulnar deviation on application of a force on the snap joint. The limb is also capable of pronation / supination actions. By application of a force on an arm snap joint, the flexible wrist 216 can be adapted to perform extension / flexion, radial / ulnar deviation.

The invention relates to the technical field of control engineering, in particular to a touch-based prosthetic hand multifunctional sharing control method, which comprises the following steps of: S1, acquiring a surface electromyogram signal of a user in real time, and identifying a motion intention of the user based on the surface electromyogram signal; s2, a finger needing to move is determined according to the movement intention of the user, the current availability of the finger needing to move is judged through fingertip touch readings, and a movable finger is determined and pre-grabbed; s3, after pre-grabbing is conducted, the movable fingers are controlled to conduct stable grabbing by calculating the grabbing force change rate of each finger at the adjacent moments; and S4, after stable grasping is carried out, the grasping power level is adjusted by executing a target activation gesture, and control over the prosthetic hand is completed. Stable grasping of the prosthetic hand, in-hand operation and one-hand multi-grasping control can be achieved.

The invention provides a self-adaptive force feedback control method for a pressure sensing artificial hand. The self-adaptive force feedback control method comprises the following steps: S1, acquiring a pressure signal; s2, pressure signal preprocessing; s3, setting a pressure threshold value; s4, pressure signal contrastive analysis; s5, generating an adaptive force adjusting signal; s6, executing driving force; and S7, acquiring and feeding back a force feedback signal. Through sensing-analysis-adjustment-feedback closed-loop control, self-adaptive grabbing of the artificial hand to different objects is achieved, the core is that the grip strength is dynamically adjusted based on pressure signals, and grabbing stability and object safety are both considered.

The claimed group of inventions relates to a field of anatomical engineering, and it relates to a mechanical finger and an actuator therefor, which may be used in imitators and prostheses of upper limbs. The mechanical finger is a structural element that performs a gripping function, consists of movable phalanxes, elements for modifying their position relative to each other, and a driving rope that is connected to a lead nut that is, in turn, intended to interact with an electromechanical actuator that transmits a force to the mechanical finger. According to the invention, the rope is fixed on the lead nut and divided into two portions which are arranged symmetrically relative to a sagittal plane of the proximal phalanx and laid on the guides. Therewith, cavities are provided in locations of the rope which are configured to receive loops of the rope, and a length of each of them equals to a travel length of the lead nut. The actuator is a power module that is aimed to drive and to control a movement of the mechanical finger. It consists of a motor reducer having a front shaft with a lead screw mounted thereon, the lead screw is configured to be coupled to the lead nut, and an encoder that is configured to enable a connection to the contact board of the artificial wrist, thereby powering the motor reducer and transmitting pulses. The actuator and the mechanical finger are individual modules of the artificial wrist which together form a single module.

A system and method for a prosthetic assembly that includes a first prosthetic component, comprising a prosthetic hand base; a set of second prosthetic components, comprising a set of prosthetic fingers, and a set of actuating systems, wherein one actuating system connects a pair of distinct prosthetic components, enabling actuation of one prosthetic component with respect to the other. Each actuating system, from the set of actuating systems, includes a linkage and a sensored brushless motor; wherein the sensored brushless motor comprises a brushless motor, a field oriented control system, a rotary encoder, and a gearbox.

The invention relates to a 4D printing bionic artificial limb and a preparation method and application thereof, and relates to the technical field of medical rehabilitation instruments, the bionic artificial limb comprises a bionic skeleton and a flexible driving unit; the flexible driving unit is located at a joint moving part of the bionic skeleton and is used for driving the bionic skeleton to move; the bionic artificial limb is integrally formed through 4D printing, the bionic skeleton is made of a shape memory composite material, and the flexible driving unit is made of a hydrogel driving material; the shape memory composite material comprises a shape memory polymer and a reinforcing material in a mass ratio of (80-95%): (5-20%); the hydrogel driving material comprises a thermo-sensitive polymer matrix, a stabilizer and a functional filler in a mass ratio of (50%-80%): (20%-40%): (3%-15%). The 4D printing bionic artificial limb has the dynamic adjusting capacity, and the change requirements of the residual limb under different conditions can be met.

A mobility augmentation system monitors data representative of a user's motor intent and augments the user's mobility based on the monitored motor intent data. A machine-learned model is trained to identify an intended movement based on the monitored motor intent data. The machine-learned model may be trained based on generalized or specific motor intent data (e.g., user-specific motor intent data). A machine-learned model initially trained on generalized motor intent data may be re-trained on user-specific motor intent data such that the machine-learned model is optimized to the movements of the user. The system uses the machine-learned model to identify a difference between the user's monitored movement and target movement signals. Based on the identified difference, the system determines actuation signals to augment the user's movement. The actuation signals determined can be an adjustment to a currently applied actuation such that the system optimizes the actuation strategy during application.

The invention relates to the technical field of intelligent prosthetic control, and discloses an intelligent prosthetic hand and a control method thereof.The control method comprises the steps that a grabbing task is started through electromyographic signals, forearm movement postures are obtained in real time through an inertia measurement unit, the movement context is judged, and a gesture prototype is automatically selected based on the context to drive the prosthetic hand to be preformed; the proximity sensor detects a target object and then triggers the finger to close. Through intelligent mapping of the motion context and the gesture prototype, physiological synergy of the grabbing intention and the limb motion is achieved, a user can complete natural and smooth grabbing operation without deliberately planning actions, meanwhile, dynamic adjustment of the motion speed characteristics and the myoelectricity trend intensity is combined, and the user experience is improved. The system can adapt to the speed and force requirements of different scenes, and the operation cognitive load is remarkably reduced.

The application relates to an adaptive control system of a bionic arm modular joint, which is installed between a bionic arm and a human shoulder, and the system comprises a collection module, a processing module, an adaptive controller module and a torque calculator module; the collection module obtains an initial control voltage group; after being processed by the processing module, a load torque, an input current and an input rotating speed are obtained; the load torque, the input current, the input rotating speed and a preset rated rotating speed are input into the adaptive controller module to obtain a first voltage group; after being processed by the processing module, a compensation control voltage of the modular joint is obtained; the compensation control voltage is input into the processing module to obtain an encoding value; and the processing module drives the modular joint according to the encoding value. Compared with the prior art, the adaptive control requirement is realized by obtaining an easily controlled current voltage value, and the application has the advantages of strong real-time performance, accurate control and the like.

A method of monitoring a device that includes a soft pneumatic actuator and a gas pump, the soft pneumatic actuator configured to actuate, assist and / or resist a movement of a body part. The method includes measuring the pressure of a fluid in the internal chamber of the soft pneumatic actuator. The pressure measurement or measurements is / are used to estimate anyone or any combination of: the volume of the internal chamber; the three-dimensional position, shape, and / or displacement of the soft pneumatic actuator; and the force delivered by the soft pneumatic actuator.

A prosthetic hand comprises a palm part; a proximal thumb part coupled to the palm part to form a first joint with a first axis of rotation, wherein the proximal thumb part is configured to rotate about the first axis of rotation; a distal thumb part coupled to the proximal thumb part to form a second joint with a second axis of rotation, wherein the distal thumb part is configured to rotate about the second axis of rotation; a rotary actuator configured to rotate the proximal thumb part and distal thumb part about the first axis of rotation and the second axis of rotation respectively; and a locking mechanism having a first configuration and a second configuration.

Device (1) with a movable transmission element (2) and with an actuator device (300) for specifically influencing the mobility of the transmission element (2). The actuator device (300) comprises a magnetorheological braking device (301) for generating a braking torque acting on the transmission element (2) and a drive device (302) for generating a torque acting on the transmission element (2). The braking device (301) and the drive device (302) are arranged axially adjacent to one another within a common receiving structure (303) between at least two bearing points (315, 325) of a bearing device (305).

Aspects of a multi-modal apparatus are described. For example, the apparatus may comprise a multi-energy sensor mountable in a distal portion of a digit of a terminal unit and a multi-energy haptic generator mountable in a socket of the terminal unit so that the multi-energy haptic generator is maintained against skin of an affected limb when the socket is worn on the affected limb. The multi-energy sensor may be operable with the multi-energy haptic generator to output one or more different types of haptic energy toward the skin responsive to the multi-energy sensor when the distal portion is placed in contact with an object while the socket is worn on the affected limb. Related kits, methods, and systems also are described.

Method for setting up a myoelectric-controlled prosthesis system with a prosthesis shaft (20) and a plurality of pick-up electrodes (10) for detecting electrical muscle activities, said method having the steps of: placing a surface electrode arrangement (200) with a plurality of surface electrodes (100) about the circumference of a limb stump (1), detecting electrical muscle activity at muscles of the limb stump (1) as electromyographic signals through the surface electrodes (100), evaluating the myoelectric signals in terms of their signal differentiation, selecting the control method, by which the prosthesis system is controlled, on the basis of the evaluation of the signal differentiation, and fastening the pick-up electrodes (10) to the prosthesis shaft (20).

The invention relates to the field of medical instruments, in particular to an intelligent upper limb prosthesis sensing system with a tactile representation function. The touch sensing module is used for collecting touch information when the artificial limb is in contact with an external object; the signal processing module is electrically connected with the tactile sensing module and is used for converting the tactile information into recognizable tactile feature data; the feedback control module is connected with the signal processing module and is used for generating a corresponding feedback control signal according to the tactile feature data in combination with a preset tactile feedback strategy; and the feedback execution module is connected with the feedback control module and is used for executing corresponding actions according to the feedback control signal and providing tactile feedback for the residual limb part of the patient. Tactile information (direct tactile information and indirect tactile information) is collected through the tactile sensing module, so that the perception of a patient when the patient touches an external object through the artificial limb is improved.

Adjustment and metrology systems include a first securing component configured to hold a first region of the medical device. A second securing component is configured to hold a second region of the medical device, the first securing component and the second securing component being spaced apart in a Z-direction. A plurality of positioning mechanisms is coupled to at least one of the first securing component or the second securing component, the plurality of positioning mechanisms being configured to provide a combined total of at least six degrees of freedom between the first securing component and the second securing component, wherein the degrees of freedom comprise translational movement in an X-direction, a Y-direction, and the Z- direction and rotational movement about an X-axis, a Y-axis, and a Z-axis. A heater is positioned between the first securing component and the second securing component.

The invention relates to a covering element for arranging on an orthopaedic device (1), wherein the covering element (10) has a supporting structure (11) which, when the covering element (10) is in the state attached to the orthopaedic device (1), has an inner side (12) facing the orthopaedic device (1) and an outer side (13) facing away from the latter, and at least one fastening device (15) for fastening the covering element (10) to the orthopaedic device (1), wherein at least one photovoltaic cell (20) is arranged on the outer side (13) or so as to be oriented towards the outer side (13).

According to an aspect, there is provided a prosthetic hand comprising: a wrist attachment part configured for connecting to a wrist connector; a palm part, the palm part and wrist attachment part being rotatably coupled together to form at least part of a wrist joint; and at least one locking member configured to selectively engage a corresponding engagement part coupled to the palm part, wherein the locking member is movable between an unlocked position, in which the locking member and engagement part are disengaged and the palm part is free to rotate relative to the wrist attachment part, and a locked position, in which the locking member and engagement part are lockingly engaged and the palm part is rotatably locked relative to the wrist attachment part, wherein an end face of the locking member is configured to be flush with an end face of the wrist attachment part when the locking member is in the locked position and the end face of the locking member is configured to be proud of the end face of the wrist attachment part when the locking member is in the unlocked position.

Disclosed is a system for implantable human-machine interfaces, including an implantable muscle interface device, including a substrate at least partially surrounding the muscles from which the EMG signals originate, including a first plurality of sensors and a second plurality of amplifiers for respectively capturing and amplifying electromyographic (EMG) signals originating from a motor unit under the control of neural signals representing voluntary limb movement, and a transceiver device connected to the first plurality of sensors for wirelessly transmitting signals to an external decoder for generating decoded signals that discriminate the motor signals representing the motor unit movement; and a receiver device that uses the decoded signals to interact with an external system. The system includes a first plurality of electrodes and a second implantable power source for delivering electrical stimulation to underlying tissue and internal sensory axons for the purposes of sensory feedback and neuromodulation.

A prosthetic digit usable with capacitive panels is provided. The digit includes at least one conductive layer surrounding the body of the digit, and a non-conductive sealing layer around the conductive layer preventing direct external contact of the conductive layer with the capacitive panel. The digit may have a conductive tip pad to create a series capacitive pathway between the conductive layer of the body and the electrodes of the capacitive panel. Using the digit with a capacitive panel does not require a direct conductive pathway, e.g., a pathway between the capacitive panel and the structure of the device, the user's skin, or metallic sink.

The invention provides a wearable myoelectric prosthesis control method, a terminal, a storage medium and a system, and the method comprises the steps: carrying out the wavelet packet decomposition of a surface electromyogram signal for the surface electromyogram signal of each preset muscle position of a target body, and obtaining a plurality of sub-bands and the decomposition coefficients thereof; variational mode decomposition is carried out on the surface electromyogram signals to obtain a plurality of intrinsic mode functions; extracting a first feature corresponding to each sub-band based on the decomposition coefficient; extracting a second feature of each intrinsic mode function; extracting time domain features of the surface electromyogram signals; inputting the first feature, the second feature and the time domain feature into a TabPFN model to obtain an action classification result of the target body; and controlling the myoelectric prosthesis based on the action classification result. According to the method, the wavelet packet decomposition method and the variation mode decomposition method are fused for feature extraction, and the TabPFN model is combined, so that a signal complex mode can be learned more accurately when the high-dimensional nonlinear electromyographic signals are processed, and the action recognition accuracy is improved.

The present application belongs to the technical fields of artificial limb manufacturing, and discloses a multi-air chamber human-like joint type soft thumb, which comprises a soft shell, a silica gel tube, a bellows and an interface, wherein the silica gel tube comprises an inner silica gel tube, the inner silica gel tube comprises an upper tube and a lower tube connected in sequence, the upper end of the upper tube is sealed, the lower tube comprises a main branch pipe and two auxiliary branch pipes, the main branch pipe is through the upper tube, and the outer portions of the upper tube, the main branch pipe and the two auxiliary branch pipes are all wound with fiber lines in a symmetrical double helix form; the soft shell is arranged at the periphery of the upper tube, the bellows is arranged at the periphery of the lower tube, the upper portion of the bellows is connected with the lower portion of the soft shell, the lower portion of the bellows is connected with the interface, three openings are arranged on the interface and connected with the main branch pipe and the two auxiliary branch pipes respectively. The present application overcomes the characteristics of single function, insufficient output and poor human-likeness of the existing mechanical thumb.

The application provides an upper limb prosthesis shoulder joint assembly and an upper limb prosthesis, which comprise a U-shaped shoulder joint connecting piece, a first steering wheel, a plurality of long studs, an upper bearing stop ring, a lower bearing stop ring and a bearing; the U-shaped shoulder joint connecting piece has a first section, a second section and a third section, and a second steering wheel accommodating area is formed in the middle; the first steering wheel is fixedly installed between the first section and the third section, the bearing is installed between the upper bearing stop ring and the lower bearing stop ring, and the bearing is fixedly connected with an output shaft of the first steering wheel; the long stud has a threaded section in the lower section, penetrates the first section and the third section, and fixes the upper bearing stop ring and the lower bearing stop ring with the third section; the position, where the long stud contacts the third section, has a stage, which abuts against the third section; an upper arm bearing installation shaft is installed with an inner ring of the bearing and is coaxially fixedly connected with an output shaft of the second steering wheel. The application takes into account the load bearing and the lightness of the prosthesis body.

This utility model relates to a hand with a gripping thumb, aiming to solve the problems of existing prosthetic hands, such as limited functionality, complex structure, difficult maintenance, non-removable components, and excessive weight. The hand with a gripping thumb includes a palm shell, a thumb mechanism, a return spring, and a control cable. The palm shell is a hollow structure with an internal hinge seat and a long slot. The thumb mechanism consists of a thumb head, a hinge shaft, and a drive arm, and is installed inside the palm shell. The return spring connects the drive arm and the fixed seat, and the control cable connects to the drive arm and extends from the wrist, achieving the swinging gripping of the thumb head through its reaction with the return spring. This utility model has a simple structure, few parts, low cost, and is easy to maintain. The palm cover of the palm shell is removable, facilitating repair and replacement, and reducing maintenance costs. The overall design is lightweight, reducing the burden on patients and providing a practical, economical, and reliable solution for amputees, meeting their diverse daily needs.

The utility model discloses a bionic manipulator wearing device convenient to install. The bionic manipulator wearing device comprises a wearing sleeve and an inflator. A first annular air bag and a second annular air bag are embedded in the front end of the inner wall of the wearing sleeve, the inflator is fixedly installed at the rear end of the interior of the wearing sleeve, an air outlet pipe is fixedly installed on the rear side of the top of the inflator, an air conveying pipe is embedded in the upper portion of the interior of the wearing sleeve, and the other end of the air outlet pipe communicates with the air conveying pipe; branch pipes are installed on the tops of the first annular air bag and the second annular air bag, and the other ends of the branch pipes communicate with an air conveying pipe. An arm can be inserted into the wearing sleeve to push the piston to move so as to inflate the first annular air bag and the second annular air bag, the first annular air bag and the second annular air bag are utilized to realize clasping and fixing work, only the manual valve needs to be opened to deflate during dismounting, wearing and dismounting can be completed by a single hand, operation is simple, and practicability is high. And the wearing is more comfortable.