175results about How to "Accurate force" patented technology

According to one aspect of the invention, a force measurement system includes a force measurement assembly, a motion base configured to displace the force measurement assembly, and an inertial compensation system configured to determine the inertial forces and/or moments resulting from the displacement of the force measurement assembly by the motion base. According to another aspect of the invention, a method for accurately determining the forces and/or moments applied to a surface of a force measurement device by a subject disposed thereon is disclosed, which includes the step of determining, by using an inertial compensation system, the inertial forces and/or moments resulting from the displacement of a force measurement assembly by a motion base. According to still another aspect of the invention, a force and/or motion measurement system having inertial compensation includes a motion acquisition system having a plurality of motion sensing devices configured to capture a subject's movement.

A detection unit directly detects an operating force acting on a wheel. A computation unit respectively computes a current value of a regenerative braking force and a current value of a friction braking force based on the result of a detection by the detection unit. A setting unit sets a target value of the regenerative braking force and a target value of the friction braking force based on a required braking force. A control unit controls a regenerative braking device based on the current value of the regenerative braking force so that the regenerative braking force approaches to the target value and also controls a friction braking device based on the current value of the friction braking force so that the friction braking force approaches to the target value.

A bicycle rear derailleur includes a base member mountable to a bicycle frame. A movable member is movably coupled to the base member. A chain guide assembly is rotatably connected to the movable member for rotation about a rotation axis. A biasing element is configured to bias the chain guide assembly for rotation in a first rotational direction with respect to the movable member. A damper assembly is operatively disposed between the chain guide assembly and the movable member to apply a damping force to the chain guide assembly when the chain guide assembly rotates in a second rotational direction opposite to the first rotational direction. The damper assembly includes a one-way roller clutch assembly disposed coaxially about the rotational axis and a friction unit extending circumferentially over a circumferential angle coaxially about the rotational axis.

A slide hammer includes three major components, namely, a guide sleeve, a plunger and an impact head. The plunger is inserted within the guide sleeve. The impact head is secured within the distal end of the guide sleeve, and has a portion which protrudes from the guide sleeve distal end. The impact head is able to freely slide within a segmented portion of the guide sleeve distal end, or the impact head movement may be controlled by a spring. The plunger is slid within the guide sleeve at a selected velocity in order to contact the portion of the impact head slidably secured within the guide sleeve. The force of the plunger striking the impact head is transmitted through the impact head to a targeted object in contact with the protruding portion of the impact head. The impact head may be fitted with various types of tips. Each of the tips has particular advantages in applying force to a targeted object.

A cylinder chamber filled with a liquid, a piston disposed inside the cylinder chamber, a piston rod connected to the piston, and an accumulator allowing the piston rod to generate a damping force by receiving the liquid from a compression side of the cylinder chamber are included, and on an internal periphery of the cylinder chamber, one line of a helical damping groove is formed within a stroke range of the piston, a groove width of the damping groove is constant over the entire length of the damping groove, a depth of the damping groove gradually decreases along a spiral toward the direction in which the piston rod is pushed in, and a length of the piston in a direction along the axis line is smaller than a pitch of the damping groove.

A method for installing the gantry crane features that in the procedure of lifting up the large steel beam, the rigid legs and flexible legs are also lifting. It includes such steps as in-situ assembling master steel beam, hanging the carrier and maintenance hoist from the master beam, standing up two lifting towers, hydraulic lifting while segmenting assembling rigid legs and flexible legs, installing the running mechanism to the legs, and structural installation.

Damping valve device having a damping valve body with at least one flow channel, which is closed at least partially by a first spring-loaded valve disk on a first valve seating surface, and a second spring-loaded valve disk, which rises from its valve seat at a higher opening pressure than the first valve disk. One of the cover sides of the first spring-loaded valve disk is held under tension on the first valve seating surface while the other cover side is held under tension on a second valve seating surface, and one of the valve seating surfaces of the first valve disk executes a lifting movement synchronously with the second spring-loaded valve disk.

A control device for a walking assistance device includes a seating section on which a user is seated, a pair of left and right foot sole installation sections fitted to the foot soles of the legs of the user, a pair of left and right leg links which connect the seating section to the foot sole installation sections, actuators which drive joints of the leg links, and an acting force detection means which detects force acting on the user from the seating section. The control device controls a driving force of at least one of the actuators according to the detected value of the acting force so that the force acting on the user is maintained at a least at a predetermined lower limit of upward force. Thus, desired user motions, such as jumping can be performed while appropriate force acts on the user from the seating section.

A suspension ECU 13 computes an actual roll angle φ and an actual pitch angle θ of a vehicle, and computes a difference Δθ between a target pitch angle θa and the actual pitch angle θ. The ECU then computes a total demanded damping force F which must be cooperatively generated by shock absorbers 11a, 11b, 11c, and 11d so as to decrease the computed Δθ to zero, and distributes the total demanded damping force F in proportion to the magnitude of a lateral acceleration Gl such that a demanded damping force Fi on the turn-locus inner side becomes greater than a demanded damping force Fo on the turn-locus outer side. Further, the ECU 13 determines whether or not the vehicle body is vibrating in the vertical direction as a result of input of a road surface disturbance, calculates a vibration-suppressing damping force Fd needed for damping the vibration, and determines the demanded damping forces Fi and Fo by use of the vibration-suppressing damping force Fd. Thus, unnecessary vibration in a turning state is quickly converged.

A welding method is disclosed for butt welding a first base material 1 and a second base material 2 with each other. To also permit stable and efficient formation of a bead in the form of a fillet weld on a back side of a groove by conducting arc welding from the side of the groove without arranging a bead beforehand on the back side of the groove, the first member 1, on which a root face 1a and a single groove face 1b have been formed, is brought at its root face 1a into contact with a flat surface 2a of the second base material 2. A welding wire 6 is arranged facing on the groove formed by the contact between the first base material 1 and the second base material 2. The first base material 1 and the second material 2 are caused to fuse at an area of contact between them by an arc from the welding wire 6. A melt, which has been formed by the fusion at the area of contact and the like, is forced out to the back side of the groove to form a bead B4 in the form of a fillet weld on the back side of the groove.

The invention discloses a static strength and fatigue test device for a tumbler type shaft housing as well as its method. A static strength and fatigue test is implemented independently for the tumbler type shaft housing by taking an equivalent load converted from a line spectrum load, so that the test specifications and flows of loads in a plurality of directions are standardized to obtain a real and accurate shaft housing strength and fatigue test results and further assist in the improvement and optimization of the structure and stress design of the shaft housing. The test device for a static strength and fatigue test method of the tumbler type shaft housing comprises a loading beam and a shaft housing seat. A shaft housing body of the tumbler type shaft housing is fixed on the shaft housing seat. A shaft housing spring seat on the top of the tumbler type shaft housing is connected with a first vertical actuating cylinder. A second vertical actuating cylinder, a transverse actuating cylinder and a longitudinal actuating cylinder are connected to an elastic joint of the tumbler type shaft housing respectively.

A compact multi-axis load cell with opposing rigid mounting elements includes annular flanges at the perimeter of the elements. A sensing region is formed between the rigid mounting elements by bonding, as by welding or brazing, opposing annular flanges at their end surfaces. To increase the mass and rigidity of the opposing mounting elements, the annular flanges may be partially formed by a peripheral groove, the groove defining a portion of an inside surface of the annular flange. The peripheral groove provides sufficient flange length for affixing strain gauges while positioning internal surfaces of the mounting elements close together in order to reduce the overall length of the load cell. Sensing circuits affixed to the outside surface of the sensing region provide output signals responsive to forces and moments exerted between the rigid mounting elements in at least two substantially perpendicular directions.

The present invention relates generally to a device of and a method for correcting spinal deformities, such as scoliosis and kyphosis. The invention employs the superelasticity or pseudoelasticity, such as found in a nickel-titanium alloy, to provide a continuous, predictable, and controllable correction force and to achieve a gradual and full correction. The correction force can be exerted on the deformed spine either at the time of the spine surgery or after the surgery or both, to afford a full or substantially full correction. The continuous and controllable correction force of the present invention is safer than an instantaneous and large correction force applied only at the time of surgery. Additionally, the continuous and controllable correction force is capable of gradually and fully correcting the spinal deformities without any post-operative manipulation of the correction device or re-operation.

The invention discloses a new submodel finite element analysis method based on cutting boundary deformation constraint. The content of the method comprises: building a complete machine simplified model, analyzing; carrying out postprocessing to cutting boundary nodes of the complete machine model; building a finite element model-a submodel of a partial structure; adding a deformation coupling constraint equation to the cutting boundary of the submodel, adding a displacement interpolation boundary condition and a force boundary condition; analyzing the submodel; and checking that the distance from a cutting boundary to a stress gathered region is far enough. The method of the invention is advantaged by that when applying the boundary conditions to the cutting boundary of the submodel, the displacement interpolation boundary condition is added to one part of the cutting boundary, the constraint equation and the force boundary condition are added to the other part; the accuracy of the boundary conditions of the submodel is ensured; compared with the traditional submodel finite element analysis method, in adoption of the new submodel finite element analysis method, the demand of the complete machine model is reduced; the complete machine model is greatly simplified; and the complete machine analysis efficiency and the calculation precision of the submodel are improved.

An apparatus for detecting hand force or hand pressure includes a longitudinally extending hollow body having an upper fixed end part, a lower fixed end part and a longitudinally extending spacer element that keeps the upper end part and the lower end part mutually spaced apart. The hollow body includes a flexible outer cover which connects the upper end part to the lower end part such that a closed inner space is formed within which the spacer element is also arranged. The outer cover is can be at least partly surrounded by a hand, and the inner space of the hollow body contains a gel, elastic multicomponent or liquid material which acts as a pressure transmitter. A pressure measuring apparatus extends at least partly in the inner space in the longitudinal direction to transmit the pressure from the outer cover via the pressure transmitter to the pressure measuring apparatus.

A flexible polishing constant-force control device driven by double actuators comprises a base plate. A main adjusting mechanism and a fine adjusting mechanism are installed in the middle of the base plate. Linear guide rails are arranged on the two sides of the main adjusting mechanism and the fine adjusting mechanism. The linear guide rails are provided with sliding blocks. The front ends of piston rods of the main adjusting mechanism and the fine adjusting mechanism are both connected with joint bearings. Force sensors are arranged between the piston rods and the joint bearings. The joint bearings are connected with connecting racks. The flexible polishing constant-force control device driven by the double actuators is installed at the tail end of an industrial robot, and an automatic-cutter-change electric spindle on the industrial robot is connected with the flexible polishing constant-force control device driven by the double actuators through a clamping device. The automatic-cutter-change electric spindle clamps a polishing head to polish a workpiece. The main adjusting mechanism and the fine adjusting mechanism rapidly respond. The force sensors monitor the polishing force in real time, control over the polishing force is accurately guaranteed through a closed-loop system, and constant-force control is achieved. According to the flexible polishing constant-force control device driven by the double actuators, a wide force adjusting range can be obtained through the main adjusting mechanism, fine adjustment is conducted through the fine adjusting mechanism, the control precision is high, response is rapid, smooth polishing is achieved, and the polishing quality is improved.

The invention provides a method and a device for calculating the internal force of an extra-high voltage steel tube tower. The method comprises the following steps: the internal force of a main material of the steel tube tower is calculated by a beam element model; and the internal force of the part except the main material of the steel tube tower is calculated by a lever unit module. As a lever unit belongs to a unit type that two ends of the lever are hinged, two unit lever end nodes both can generate linear displacement in three directions only and only can bear axial force but not bending moment; the beam element belongs to a unit type that two ends of the lever are rigidly connected, and two unit lever end nodes both can generate linear displacement in three directions and rotational displacement in three directions, and can bear axial force and bending moment. The calculated stress of the steel tube tower is more close to the stress condition of a real steel tube tower and is more accurate than the stress of the steel tube tower calculated completely by the lever unit in the prior art.

An apparatus and a method for driving an icemaker for making ice cubes in a refrigerator. An ice-full state is sensed in such a way as to rotate an ejector and a cam gear in a reverse direction (opposite to an ice-ejecting direction), thereby preventing interference with the ice cubes present in the icemaker and thus enabling the ice-full state to be accurately sensed. A first torsion spring is mounted to an intermediate gear with a small rotation angle ratio to allow only a minimum amount of torque to be transferred to other components such as an ice-detecting lever, thereby increasing the durability of the components and providing a precise rotation force. The axial center of rotation of a second torsion spring is defined at a position that faces the other end (the revolving end) of the ice-detecting lever, to allow a minimum moment to be substantially constantly applied.

A shedding device in a jacquard loom, having a heddle with a retracting spring rigidly anchored in the loom or to the floor for urging the heddle to a lower shed forming position. To suppress the development of resonance in the spring, a core element is provided, which contacts the inside of the spring at points spaced apart from one another and forces the spring to take a course which deviates from the rectilinear. As a result, friction forces that contribute to damping the spring motion are created between the spring and the core element.

Disclosed is a multi-component force measurement spindle unit that accurately measures forces and moments applied to a tire in a tire testing machine. The multi-component force measurement spindle unit of a tire testing machine includes: a spindle shaft on which a tire can be mounted; an inner sleeve that rotatably supports the spindle shaft via a bearing part; an outer sleeve arranged on an outside of the inner sleeve along an axial center direction of the spindle shaft; a multi-component force measurement sensor that connects an end of the inner sleeve and an end of the outer sleeve to each other and is capable of measuring a load acting on the outer sleeve from the inner sleeve; and a cooling part that cools the inner sleeve.