46 results about "Skin stretch" patented technology

The invention discloses an electric skin taking device and relates to the technical field of medical instruments, the electric skin taking device comprises a rack and a connecting rod, the end of the rack abuts against the end of the connecting rod, the seam of the rack and the connecting rod is in threaded connection with the bottom end of a stand column, and the upper end of the stand column is fixedly connected with the four corners of a frame; guide grooves are formed in the side walls of the racks, the guide grooves of the racks are oppositely arranged, a skin taking assembly is slidably installed between the opposite faces of the racks, and a skin supporting assembly is installed on the upper surface of the connecting rod; the lower surface of the rack is flush with the lower surface of the connecting rod; a control assembly is installed on the upper surface of the frame, and the skin taking assembly and the skin supporting assembly are both electrically connected with the control assembly. According to the electric skin taking device, skin taking operation of a patient can be completed by one person, skin source continuity, integrity and thickness consistency of skin taking can be guaranteed, meanwhile, operation is convenient, and the holding hand feeling is good.

The invention discloses a skin stretch forming residual stress rapid calculation method which comprises the following steps: randomly generating a combination of a pre-stretching amount, a coating elongation rate and a friction coefficient, submitting the combination to finite element analysis software to execute batch simulation, and generating a result file named by process parameters; traversing all the result files, extracting node numbers and residual stress values, and storing the node numbers and the residual stress values as a text format data set corresponding to the process parameters; a full-connection neural network model is constructed, an input layer receives the three process parameters of the pre-stretching amount, the coating elongation and the friction coefficient, a hidden layer comprises multiple layers of neurons and adopts a ReLU activation function, and an output layer generates residual stress values of all nodes; training the neural network model by using the data set, and adjusting the network weight through an optimizer; and inputting target process parameters to the trained neural network model, and outputting residual stress calculation results of all nodes of the skin. The technical purposes of rapidness, high efficiency and low cost are achieved.

A vehicle seat includes a frame; a pad disposed on the frame; a skin covering the pad; an airbag device attached to the frame, and including an airbag and an inflator; a guide member that is provided on an inner surface side of the skin at a position corresponding to the airbag device, and that guides a deployment of the airbag; and an engagement member that pulls the skin in the pad. A length in an up to down direction from a first upper end to a first lower end of the engagement member is longer than a length in the up to down direction from a first upper end portion to a first lower end portion of a first end portion of the guide member.

The utility model discloses a control system of a transverse skin stretching pitching mechanism, which belongs to the technical field of skin stretching hydraulic machines and comprises a proportional servo valve, one end of the proportional servo valve is communicated with an oil tank, and the other end of the proportional servo valve is communicated with a counterbalance element. A check element is arranged between the proportional servo valve and the counterbalance element, one side of the check element is communicated with an electromagnetic reversing valve, the electromagnetic reversing valve is communicated with an oil tank, the counterbalance element is respectively communicated with a safety valve and a leak-free valve, one side of the leak-free valve is communicated with a supporting valve, and the supporting valve is communicated with the oil tank. A pressure sensing element and a shock-proof sensing element are further installed on one side of the counterbalance element, three stretch forming processes are provided for a pitching mechanism of the transverse skin stretch hydraulic press, and the use requirements of users for high efficiency and high quality are met.

The invention discloses a multi-modal intelligent skin patch for multi-scene cardiopulmonary function monitoring and a use method thereof. The multi-modal intelligent skin patch comprises a layered structure body, a flexible circuit board, a multi-modal sensing assembly, a power management assembly and a wireless communication module. The layered structure body comprises an upper Ecoflex material layer, a lower Ecoflex material layer, a lithium battery and a wireless charging coil, wherein the lithium battery and the wireless charging coil are packaged between the two Ecoflex material layers. A layered structure in which the upper Ecoflex material layer and the lower Ecoflex material layer package the lithium battery and the wireless charging coil is adopted, and a polyimide flexible circuit board and a double-bridge snake-shaped structure sensing wire are combined, so that the equipment is endowed with excellent tensile tolerance and skin fitting property; in cooperation with the sweat-proof adhesiveness of the 3M2477P medical silica gel double-faced adhesive tape and the high conductivity of the high-adhesiveness conductive hydrogel layer, the problems of electrode falling and signal distortion caused by sweating and skin stretching in violent activities such as high-intensity intermittent movement are fundamentally solved, and stable acquisition of electrocardio, PPG and respiratory wave signals is ensured.

The utility model relates to the field of stretching probes, in particular to a stretching probe for migratory locust epidermis testing, which comprises a support table. The texture analyzer main body is mounted at the rear end part of the supporting table, the fixture base is arranged at the upper end part of the supporting table, a first fixture seat is mounted at the upper end part of the fixture base, and a second fixture seat is arranged at the upper end part of the first fixture seat; the end part of one side of the first clamp seat and the end part of one side of the second clamp seat are rotationally connected with plug bolts; springs are arranged on the outer sides of the plug bolts; the texture analyzer main body and the clamp base are placed through the supporting table, the friction fixing seat is driven to move through the knob bolt, and the friction fixing seat is positioned and supported through the plug bolt and the spring, so that the friction fixing seat is matched with the first clamp seat and the second clamp seat to clamp migratory locusts; the migratory locust is protected through the friction plate, so that the stability is improved, and an epidermis stretching test can be conveniently carried out through the texture analyzer main body.

The present invention provides a multi-axis coordinated motion control system and method for a skin stretching machine. The control system includes a controller, a servo valve, and a displacement sensor. The servo valve is installed on the pipeline connecting the stretching branch and the hydraulic station, and the displacement sensor is installed on the stretching branch. The servo valve and the displacement sensor are both electrically connected to the controller. The controller of the present invention obtains an inverse analytical solution for the stretching branch position of the skin stretching machine corresponding to the ideal motion trajectory of the clamp based on an established mathematical model for multi-axis coordinated motion control of the skin stretching machine. After obtaining the ideal displacement trajectory curve of the stretching branch, it sends a command to the servo valve, which then drives each stretching branch hydraulic cylinder to move according to the ideal displacement trajectory curve. During the motion control process, the controller subtracts the real-time data of the displacement sensor from the ideal displacement to obtain a motion control quantity, and sends this motion control quantity to the servo valve to adjust the displacement of the stretching branch, control the motion trajectory of the clamp, and realize multi-axis coordinated motion control of the skin stretching machine.

An ungrounded haptic device adapted to be held or worn by a user for simulating kinesthetic forces includes a skin stretch mechanism and at least one vibration generator. The skin stretch mechanism provides haptic shear forces to the skin of the user to simulate continuous and / or persistent forces. A vibration generator mounted to the haptic device provides haptic vibrations to the user to simulate transitory forces. Parameters of the haptic shear forces and parameters of the haptic vibrations are configured to operate complementarily to simulate the kinesthetic forces.

The present application relates to skin stretch forming technical field, and disclose a kind of stretch forming equipment for aluminum alloy skin, including rack, the inside of the middle part of the rack is equipped with jacking mechanism, the upper end of the jacking mechanism is connected with discrete die, the both sides of the rack are respectively provided with multiple groups of independent control flexible clamping mechanism, and the flexible clamping mechanism is symmetrically arranged about the discrete die;The flexible clamping mechanism includes stretch assembly and pressing assembly, the stretch assembly is installed on the pressing assembly, and the pressing assembly is installed on the hydraulic caliper for clamping skin edge.The present application is lifted by the lifting movement of multiple independent control punch assemblies in discrete die, combined with the multilayer composite structure of flexible pad layer, can quickly generate any required curved surface shape without replacing the whole die, and the pneumatic adjusting cavity is independently adjusted by each area inflation pressure, effectively compensates the "step effect" between discrete punch.

The present invention provides a hook-type skin stretching and closure device, comprising an adjustment assembly and a fixed hook device, the adjustment assembly comprising a threaded rod, a pressure-adjusting member, a pressure-adjusting spring, a sliding sleeve, and a fixing nut, the fixing hook device comprising a fixed hook body and multiple hooks disposed on the fixed hook body, the fixed hook body having a circular hole transversely disposed on its upper portion, the fixing nut and the pressure-adjusting member being screwed onto the ends of the threaded rod, the pressure-adjusting spring and the sliding sleeve being sequentially sleeved on the threaded rod, the pressure-adjusting member, the pressure-adjusting spring, and the sliding sleeve being sequentially pushed together, an inner sleeve and an outer sleeve being sleeved together on the threaded rod between the sliding sleeve and the fixing nut, the two fixed hook devices being slidably sleeved on the inner sleeve through the circular hole and axially pushing together with the outer sleeve and the fixing nut, the outer sleeve being pushed together with the sliding sleeve; alternatively, the inner sleeve may be omitted and a bare rod section may be disposed in the middle of the threaded rod, thereby ensuring that the fixed hook device will not become stuck when sliding.

The invention belongs to the field of aircraft skin part stretch forming processes, and relates to a skin multi-angle progressive coating stretch forming method which is suitable for stretch forming of complex different-direction and multi-curvature skins. Through the large-angle plasticity and multi-angle progressive coating stretching forming method, materials flow uniformly in the part stretching process, and precise attachment is achieved step by step. According to the tool, a symmetrical compensation tool design structure is adopted, the structure is simple, manufacturing is easy and convenient, material taking and using are convenient, cost is low, benefits are high, and the high practical application value is achieved. After optimization, the number of overall required tools of the parts is reduced by half, the tool production cost is reduced, the tool production period is shortened, the appearance precision meets the file gap control requirement, the overall appearance of the parts is smooth, the top area is formed well, and the surface is free of wrinkles and orange peel defects.

The application discloses a skin stress deformation measurement system, method and device, wherein the system comprises: an executor end provided with a transparent pressing part, the pressing part is used for pressing the skin and moving according to a preset direction; a micro camera arranged in the executor end and collecting a first image through the pressing part; a stereo vision camera installed outside the executor end and used for collecting a second image on a skin stretching area and / or a skin accumulation area; and a data processing module, which obtains three-dimensional coordinates of skin particles in an effective contact area according to the first image, obtains three-dimensional coordinates of skin particles in the skin stretching area or the skin accumulation area according to the second image, obtains a deformation condition of the skin according to the obtained three-dimensional coordinates of the skin particles, and performs three-dimensional estimation on the skin stress deformation. The application performs three-dimensional estimation on the deformed skin, provides more accurate data for a skin contact force model, and can be applied to the field of skin stress deformation measurement.

The invention discloses an in-vitro skin stretching model construction method. The method comprises the following steps: acquiring sheet-shaped in-vitro skin; the flaky in-vitro skin is subjected to pretreatment operation for standby application; the skin tissue is installed on a fixed part and a movable part which are arranged on a distraction support and are adjustable in relative position, a culture solution is injected into a culture dish, the distraction support is placed in the culture dish, and the skin tissue is soaked in the culture solution; the relative positions of the fixed part and the movable part are adjusted, and the traction force borne by the skin tissue is changed; the skin tissue is taken down from the distraction support; skin tissue parameters are collected for in-vitro skin stretching model evaluation. According to the invention, the construction of the experimental model completely relying on the human skin for mechanical research can be realized, and the accuracy of data is improved.

The utility model discloses a control system for adjusting the bending rigidity of a shoe sole. The control system comprises the shoe sole and a controller. The sole comprises a midsole body, a sliding piece and a driving piece. The sliding part is arranged in the insole body and provides rigidity for the insole body, and the driving part drives the sliding part to slide in the insole body in the front-back direction. When the sliding part is located at the half sole part of the insole body, the bending rigidity of the sole is increased, and when the sliding part is not located at the half sole part, the bending rigidity of the sole is reduced. The controller is arranged on the hand and comprises a stretching sensor and a signal generator, the stretching sensor senses stretching or contraction of the hand skin, and the signal generator controls the driving piece to drive the sliding piece to slide forwards or backwards. The control system meets the requirement that the bending rigidity of the shoe sole can be adjusted, and meanwhile the intelligence and individuation of the adjusting mode are improved.

The invention discloses a measuring method and a measuring device for skin stretch forming, and belongs to the technical field of skin processing. According to the measurement method for skin stretch forming, online measurement is carried out on the skin in stretch forming production, so that after stretch forming production is completed, the actual readings of the multiple laser distance measuring pieces are recorded, then the actual cross section is fitted according to the theoretical cross section line of the skin on the preset cross section, and the skin stretch forming precision is improved. Therefore, the purpose of measuring the actual cross section line of the skin on the preset cross section can be achieved, the skin stretch-forming state evaluation difficulty is reduced, and the skin stretch-forming precision can be fully evaluated. According to the measuring device for skin stretch forming, the position of the laser distance measuring part can be greatly adjusted by disassembling and assembling the mounting part; by sliding the second sliding rail and the laser distance measuring part, the positions of the laser distance measuring part in the first direction and the second direction can be finely adjusted, and operation is convenient.

The application discloses an intelligent skin stretching closer, which comprises a cable, a skin traction fixing device, an adjusting device, a driving device, a control device and a pressure sensing device; the cable is used for penetrating into the skin traction fixing device, the adjusting device and the pressure sensing device and bears the traction force of the driving device to the skin; the power device is used for pulling the cable and automatically adjusting the distance between the two skin traction mechanisms to realize the contraction and closure of the skin to be pulled on both sides of the wound; the closer further comprises a driving motor fixedly connected with a female part, a control panel electrically connected with the driving motor and a programmed controller; the closer can realize automatic control, reduces the operation and makes the process controllable.

The application relates to a hyperbolic skin part machining method with local features, and belongs to the technical field of aviation sheet metal manufacturing. The combined forming machining method of the hyperbolic skin local feature part ensures the consistency of skin stretch forming and local forming under the same positioning condition, ensures the shape precision of the skin in the manufacturing process, and improves the accuracy of skin forming machining and measurement. The increased pneumatic forming structure device on the tool structure breaks through the process of completing machining of one skin part by two sets of independent toolings. The two-time forming and one-time positioning mode can accurately manufacture the width and depth of the complex structure, can realize uniform stress of the complex structure surface of the skin, and can realize smooth transition of the surface quality.

The invention discloses a campus sports digital management method and system, and relates to the technical field of campus sports intelligent digital management, and the method comprises the steps: firstly collecting student basic sports information, target skill action categories and teaching standard text data, and building a standard action data set; video images, electromyographic signals and skin stretching data in the action execution process of the student are collected, and an action perception set is constructed; calculating an action completion consistency index, comparing the index with a first threshold value, and evaluating the action quality; calculating a muscle-motion cooperation coefficient, comparing the muscle-motion cooperation coefficient with a second threshold value, and monitoring a motion force application structure; based on the trained AI scoring model, automatically outputting an action score and a part error, further calculating a skill growth index, comparing the skill growth index with a third threshold value, and dynamically evaluating the skill growth trend of the student; the system automatically generates a personalized training strategy and a comprehensive scoring report according to an evaluation result, and realizes accurate monitoring and guidance of action quality, power generation coordination and skill growth.

The application provides a kind of longitudinal skin stretcher jaw shape control method based on machine vision, which includes: S1, install image acquisition system;S2, calibrate camera by Zhang Zhengyou calibration method, establish the relationship between target pixel point and corresponding target point position in space;S3, turn on the light source, obtain the camera shooting image, and pretreat the image;S4, edge extraction is carried out on the pretreated gray scale image;S5, the edge gray scale image curve is fitted by least square method, the stroke of stretch machine jaw shape control hydraulic cylinder is adjusted, and longitudinal skin stretcher jaw shape control is realized.The application can realize accurate detection of skin blank and jaw state, make the jaw shape and end face shape consistent, and complete the fast and accurate feeding of skin blank into the jaw.The application applies machine vision recognition technology to aviation special equipment, improves the skin stretching precision and the efficiency of blank feeding into the jaw, and helps the transformation and upgrading of equipment automation and intelligentization.

The invention relates to a tactile feedback glove capable of generating skin stretching and squeezing effects and a control method, and belongs to the technical field of man-machine interaction. Comprising a glove assembly and a fingerstall assembly, position and posture synchronization of a virtual hand and a real hand is achieved through a calibration system in a Unity virtual environment, in the interaction process, a computer conducts collision detection on virtual environment interaction actions and communicates with a control system to generate a driving signal, a servo motor is controlled to drive a plastic belt to be combined with a specific mechanical structure, and therefore the mechanical performance of the robot is improved. And rendering tactile feedback under the gripping action in real time. According to the method, the visual matching effect in the interaction process is optimized in the Unity interaction scene, the interaction reality sense of a user is enhanced, and the device can be effectively applied to interaction operation of a VR virtual environment, tactile feedback training of a special scene and the like in an ideal state.

The invention provides a yoke frame swing structure of a skin stretcher, which comprises a seat bracket rotating shaft, a rack, a bracket sliding block, a rotating shaft and an oil cylinder, and can be driven by the oil cylinder to rotate, so that the pitching angle of a jaw of the stretcher can be controlled and adjusted with high precision, and the requirement of complex curved surface forming in skin part manufacturing can be met; the number of corollary equipment and procedures needed in the existing multi-direction curved surface machining process is reduced, and the manufacturing cost is remarkably reduced while the production efficiency is improved.

The utility model discloses a bionic epidermis stretching device which comprises a modeling supporting assembly, epidermis and a driving assembly, the driving assembly is connected with the modeling supporting assembly, and the epidermis is assembled on the outer surface of the modeling supporting assembly. By implementing the device, the friction force can be reduced, the driving load can be reduced, and the movement effect of the skin can be optimized, so that unnatural wrinkles can be avoided, and the bionic effect and the display effect can be further improved.

The utility model discloses a plane leather tightening machine, and belongs to the technical field of leather detection. The at least three execution pieces are uniformly distributed on the same plane of the rack; each execution part is in sliding connection with the rack and is driven by power to move, and the moving direction of each execution part points to the center of the multiple execution parts; the clamps connected with the execution pieces on the execution pieces are used for clamping the edges of leather to be machined correspondingly, and the leather is pulled to be stretched flat through coordinated movement of the execution pieces. By means of coordinated movement of the execution pieces and uniform clamping and pulling of the fixture connected with the execution pieces on the edge of the leather, the cow leather can be fully stretched flat, and the cow leather defect detection accuracy is improved.

The present invention discloses a campus sports digital management method and system thereof, which relates to the technical field of campus sports intelligent digital management. The method first collects students' basic sports information, target skill movement categories and teaching standard text data to establish a standard movement data set; collects video images, electromyographic signals and skin stretching data during the students' movement execution to construct a movement perception set; evaluates the movement quality by calculating the movement completion consistency index and comparing it with a first threshold; calculates the muscle coordination coefficient and compares it with a second threshold to monitor the movement force structure; based on the trained AI scoring model, automatically outputs the movement score and position error, further calculates the skill growth index and compares it with a third threshold to dynamically evaluate the student's skill growth trend; the system automatically generates personalized training strategies and comprehensive scoring reports based on the evaluation results, to achieve accurate monitoring and guidance of movement quality, force coordination and skill growth.

The present invention provides a method for controlling instability during deep drawing of a small-angle, narrow-tapered variable-curvature skin. The method primarily comprises the following steps: constructing a variable-curvature skin drawing process profile; determining the dimensions of the unfolded blank; designing the drawing die structure for the variable-curvature skin; and performing deep drawing. Based on the variable-curvature skin, the present invention designs a hemispherical closed structure at the end, further constructs the variable-curvature skin drawing process profile, and thereby determines the drawing die structure. This method effectively controls the material flow rate and volume, thereby avoiding defects such as wrinkling, cracking, and springback, achieving uniform part deformation, and significantly improving the dimensional accuracy and surface quality of the formed variable-curvature skin.

The application discloses a kind of forming device and method of dissimilar direction multi-drawing skin class parts;The device includes skin stretch forming device and skin drawing forming device;Skin stretch forming device has drawing lower die, upper pressing device, rotating support arm, square drawing plate, special-shaped drawing cover plate and multiple drill jig, for forming drawing feature;Skin drawing forming device has drawing lower die, blank holder guide column, positioning plate, drawing upper die and pneumatic column, for forming convex feature;The method comprises: first, through skin stretch forming device, stretch and press drawing feature, drill positioning hole and fixing hole, and use square drawing plate to knock and trim;Then, through skin drawing forming device, after locating, drawing forming convex feature of part.The application combines skin stretch and drawing process, solves the problem of forming difficulty of dissimilar direction multi-drawing skin class parts, and improves forming precision and efficiency.

The invention discloses a skin part local characteristic electromagnetic pulse forming device and method, and relates to the technical field of metal plate part plastic forming manufacturing, the skin part local characteristic electromagnetic pulse forming device comprises an upper pressing beam, a mechanical arm, an electromagnetic coil and a multi-point stretch-forming die, and the multi-point stretch-forming die is installed on a fixed bottom plate; the two ends of the skin plate are tightly attached to the top face of the multi-point stretch-forming die after being clamped and tensioned through a jaw of a skin stretch-forming machine; the shape of the top surface of the multi-point stretch-forming die is adjustable; one end of the mechanical arm is fixed to the upper pressing beam, an electromagnetic coil is installed at the other end of the mechanical arm and used for conducting electromagnetic forming on the skin plate, and the position of the upper pressing beam can be adjusted. A multi-point stretch-forming die and electromagnetic forming are combined, and meanwhile, the high-efficiency characteristic of the multi-point forming technology and the high-precision characteristic of the electromagnetic incremental forming technology are utilized, so that high-efficiency and high-precision digital forming of the complex three-dimensional curved-surface-shaped part can be realized.

The invention discloses a retraction repositor for complex fracture of distal radius, which relates to the technical field of medical instruments and comprises an arm fixing plate and a palm fixing plate, and a palm fixing component is arranged on the palm fixing plate. A radial wrist joint angle adjusting assembly used for retracting and resetting the far end of the radius is connected between the arm fixing plate and the palm fixing plate, and the arm fixing plate is further provided with a gravity center adjusting assembly and a skin opening assembly. The palm adjusting plate is driven by rotation of the adjusting fixing shaft to fix the palm, the traction rope is rolled up through the adjusting bolts on the two sides, the soft fixing plate is pulled to drive the palm to be retracted or squeezed, the radial wrist joint is retracted and reset by adjusting the angle adjusting shaft or the palm fixing plate along the arm fixing plate, the gear shaft is driven by the gear adjusting shaft to rotate, and the palm is fixed. The arm fixing plate is driven to rotate, and the skin at the far end of the radius is expanded through the expanding shaft; the device has the advantages of high precision, comprehensive functions, wide application range and convenience in use.

The application provides a sunken skin stretch forming path planning method, and belongs to the technical field of stretch forming path planning, and the method comprises the following steps: S1, acquiring the design parameters and forming constraint conditions of the sunken skin; S2, establishing a finite element model of the sunken skin; S3, initial stretch path global planning based on an echo state network-cell mapping hybrid algorithm; S4, finite element simulation verification of the initial stretch path; and S5, stretch path iterative optimization based on a fractional order Kalman filter-dove search hybrid algorithm. The application solves the problems of low stretch forming path planning precision, many forming defects, poor process stability, weak technical reproducibility and the like of the existing sunken skin stretch forming path planning.