98 results about "Joint angulation" patented technology

The invention discloses a joint angle-based rhythm collaborative analysis method, which is used for analyzing human body rhythm motion collaborative characteristics and personalized differences by utilizing the collaborative characteristics of joint angles in human body rhythm motion and combining singular values in a matrix theory, and comprises the following steps of: 1) obtaining human body motion joint angle data and calculating joint parameters such as angular velocity and angular acceleration; 2) performing stage division on a human body motion process according to human body rhythm motion stages and periodicity characteristics, and dividing joint parameter change data according to motion stages; 3) unifying the joint parameter change data matrix scale by means of interpolation or key frame extraction and the like; and 4) utilizing a matrix theory method to extract and analyze the synergy and individuation characteristics of the joint parameters after normalization processing. Human body local limb movement and movement stage data are equivalent to sub-matrixes of human body rhythm movement data, and effective evaluation of human body rhythm movement cooperative characteristics is realized by combining principles and methods in a matrix theory.

A wearable device comprises a flexible substrate carrying multiple conducting loops which are formed into a zig zag pattern so as to be able to accommodate a stretching of the substrate. The substrate is formed into a glove and the loops positioned such that they are aligned with the anatomical joints. As the anatomical joints move, the loops change shape and accordingly change their inductance—this is measured by the electronics in the glove and used to calculate the joint angles in a processor which transmits the angles to an external computer system. Some of the loops are attached to current drivers in the electronics module, and a magnet positioned close to the loop, providing means for a force to be generated between magnet and loop when the current driver passes current through the loop, thereby providing tactile feedback to the user.

The invention discloses a multi-sensor and antagonistic drive based dexterous hand control system. The system comprises an antagonistic driven dexterous hand in tendon transmission, a joint angle sensor, a touch sensor in bionic skin, a joint force and torque sensor, a tendon tension sensor, a sensor management module, a driver control module and a central control module. According to the system,perception modes of different levels of force and touch are effectively decoupled, various sense information can be flexibly and comprehensively analyzed under different operating tasks, the control difficulty is simplified, and design complexity and cost of each type of sensor (and the bionic skin with touch) are reduced; and through the central control module of the system, the dexterous hand can avoid excessive relaxation or tensioning of the tendon, joint damping and joint rigidity of each joint can be controlled, the compliance operation and the anti-interference performance and robustness can be taken into account, and the system can still work reliably when the joint force and torque sensor or the tendon tension sensor is partially or completely lacked or works abnormally.

A dual line protractor fixed to a central axis which has two housings, each housing having a spool with retractable lines, the housings and spools being rotatably attached to the central axis. The spools and housings rotate independently of each other on the central axis. The lines can be extended from the spools and the tips of the lines are attached to anatomical landmarks on first and second body members. The protractor is placed on a joint between the first and second body members. The lines extend from the spools and housings over degree marks on the protractor. The difference between the degree marks provide the angle between the body members at the joint. The application of the dual line protractor for these measurements is simple and rapid, requiring only a few minutes, so that the range of motion of several joints with several repeat measurements can be performed in a relatively short period of time. Placing the tips of the lines on anatomical landmarks produces remarkable accuracy and precision in the measurement of joint angles. Because string-like lines are used to indicate the degree marks, the dual line protractor does not interfere with the natural motion of the body member being measured, allowing accurate dynamic joint angle measurement.