1374results about "Measurement of force components" patented technology

A device comprised of at least a pair of accelerometers and a tilt sensor mounted in fixed relation to a datum plane defining surface (sole of a shoe) may be used for extracting kinematic variables including linear and rotational acceleration, velocity and position. These variables may be resolved into a selected direction thereby permitting both relative and absolute kinematic quantities to be determined. The acceleration is determined using a small cluster of two mutually perpendicular accelerometers mounted on a shoe. Angular orientation of the foot may be determined by double integration of the foot's angular acceleration (which requires a third accelerometer substantially parallel to one of the two orthogonal accelerometers). The two orthogonal accelerations are then resolved into a net horizontal acceleration or other selected direction which may be integrated to find the foot velocity in the selected direction. The average of the foot velocity corresponds to the subject's gait speed.

A portable sensor system that uses acceleration-insensitive, three-dimensional angle sensors located at various points on the patient's body, and collects data on the frequency and nature of the movements over extended periods of time.

A motion sensing apparatus generally comprising a housing unit operable to be attached to an object at an attachment position, an accelerometer operable to provide a signal corresponding to an acceleration measurement; and a processing system. The processing system is operable to acquire the signal corresponding to the acceleration measurement and analyze the acquired acceleration measurement to identify the attachment position of the housing unit.

A device for monitoring eating behavior of a user is provided. The device includes at least one sensor mounted on a head of the user, the sensor being capable of detecting jaw muscle movement and sound while not occluding an ear canal of the user.

Provided are an apparatus and a method of effectively creating real-time movements of a three dimensional virtual character by use of a small number of sensors. More specifically, the motion capture method, which maps movements of a human body into a skeleton model to generate movements of a three-dimensional (3D) virtual character, includes measuring a distance between a portion of a human body to which a measurement sensor is positioned and a reference position and rotation angles of the portion, and estimating relative rotation angles and position coordinates of each portion of the human body by use of the measured distance and rotation angles.

A force measurement system having inertial compensation includes a force measurement assembly with at least one accelerometer configured to measure the acceleration thereof. According to one aspect of the invention, the force measurement system additionally includes at least one angular velocity sensor configured to measure the angular velocity of the force measurement assembly. According to another aspect of the invention, the force measurement system additionally includes a data processing device with a computer-readable medium loaded thereon that is configured to execute a calibration procedure for determining the inertial parameters of the force measurement assembly by utilizing the measured acceleration of the force measurement assembly while the force measurement assembly is subjected to a plurality of applied linear and/or rotational motion profiles. According to still another aspect of the invention, the at least one accelerometer is disposed on the force transducer.

A method and apparatus or measuring a person's movement via a plurality of sensors is enclosed. One example method may include measuring at least one rotational value during the movement via a first sensor. Additional measurements may include measuring at least one linear value during the movement via a second sensor, and measuring a force applied from a portion of the person's body via a third sensor. The measurements may be used to generate a user interface display of the person's movement on an electronic device.

A pneumatic vehicle tire includes a carcass, a bead with a bead core arranged in the bead, and a first sensor located within the bead. The first sensor delivers signals which are correlated to frictional forces transmitted by the pneumatic vehicle tire during operation. This sensor has a first end and a second end, wherein the first end includes a heel attached to the bead core and the second end extends radially outward from the bead core within the tire. A plurality of such sensors can be included in each tire, some for measuring longitudinal forces in a circumferential direction of the tire and others for measuring lateral forces in an axial direction of the tire.

A rotary type component force measuring device capable of finding a highly accurate component force is provided. This measuring device has a rotary type component force detector comprising in integrated manner, a rim mounting frame, a hub mounting frame, a second sensing beam of a character I shaped sectional type which couples and the mounting frames, and a first sensing beam which couples the second sensing beam and the mounting frame, wherein each of front and back surfaces of receiving sensor portions adhere with each of orthogonal shearing type strain gauges A1 to H4, and a signal is derived from the strain gauges A1 to H4 by a bridge circuit for each receiving sensor portion, and the output signals from the bridge circuit are sampled by an electronic circuit disposed on the inside of a rotating unit according to the timing signal from an angle detection signal, and the output signals are transmitted to a signal processing unit disposed on the outside of the rotating unit by non-contact data transmission method, and the output signals are corrected by correction information for every rotation angle position of the detector storing the output signals beforehand, and are subjected to coordinate conversion so as to calculate the six component forces for every angle rotation.

A multi-force sensing instrument includes a tool that has a tool shaft having a distal end and a proximal end, a strain sensor arranged at a first position along the tool shaft, at least one of a second strain sensor or a torque-force sensor arranged at a second position along the tool shaft, the second position being more towards the proximal end of the tool shaft than the first position, and a signal processor configured to communicate with the strain sensor and the at least one of the second strain sensor or the torque-force sensor to receive detection signals therefrom. The signal processor is configured to process the signals to determine a magnitude and position of a lateral component of a force applied to the tool shaft when the position of the applied force is between the first and second positions.

Forces and moments are detected in a distinguished manner by a simple structure. An outer box-like structure formed of a metal is set on top of an insulating substrate and an insulating inner box-like structure is contained in the interior. Five electrodes E1 to E5 are positioned on a top plate of the inner box-like structure. Four electrodes E6 to E9 are positioned on the four side surfaces of the inner box-like structure. Capacitance elements C1 to C5 are arranged by electrodes E1 to E5 and a top plate of the outer box-like structure and capacitance elements C6 to C9 are arranged by electrodes E6 to E9 and side plates of the outer box-like structure. A force Fx in the X-axis direction is detected by means of the capacitance difference between C6 and C7, a force Fy in the Y-axis direction is detected by means of the capacitance difference between C8 and C9, a force Fz in the Z-axis direction is detected by means of the capacitance of C5, a moment My about the Y-axis is detected by means of the capacitance difference between C1 and C2, and a moment Mx about the X-axis is detected by means of the capacitance difference between C3 and C4.

Apparatus and method for refining subject activity classification for the recognition of daily activities of a subject, and a system for recognizing daily activities using the same. The refining apparatus improves the correctness of subject activity classification using daily activities of a subject, activation time information of sensors mounted on objects associated with the daily activities of the subject, and the suitability of a continuous activity pattern in relation to the daily activities. This improves the correctness of subject activity classification that becomes basic information in daily activity analysis.

The invention discloses a double rood beam high-sensitivity six-dimensional moment sensor in the technical field of robots. The double rood beam high-sensitivity six-dimensional moment sensor comprises two rood beams, two dead rings, one outer ring, and a plurality of resistance strain gages; a first rood beam and a second rood beam are arranged outside the outer ring respectively and are used as elastic bodies of the sensor for sensing stress; two dead rings are arranged outside the first rood beam and the second rood beam respectively; the resistance strain gages are adhered to the rood beams; each of the rood beams consists of four identical double-hole parallel sub beams; each double-hole parallel sub beam is provided with an I-shaped through hole; and a center hole is formed in the geometric center of each rood beam. In the double rood beam high-sensitivity six-dimensional moment sensor, floating beams used by the conventional six-dimensional moment sensor and crosstalk caused by the floating beams are removed, multi-component coupling is reduced conveniently and the measurement accuracy is improved.

A sensor system configured for use with an article of apparel includes one or a plurality of sensors formed of a polymeric material having a conductive particulate material dispersed therein and conductive leads connecting the sensors to a port. The leads may also be formed of a polymeric material having a conductive particulate material dispersed therein. The conductive material is dispersed in the sensor(s) at a first dispersion density and the conductive material is dispersed in the leads at a second dispersion density that is higher than the first dispersion density. Each of the sensors is configured to increase in resistance when deformed under pressure, which is detected by a module connected to the port. The second dispersion density is such that each of the leads has sufficient conductivity that the leads are configured to conduct an electronic signal between each sensor and the port in any state of deformation.