599 results about "Cable tension" patented technology

The present invention provides remote interfacing utilising haptic technology. In a first aspect there is provided a haptic grasping interface comprising a plurality of finger interaction points, with actuators connected at one end to an actuator control mechanism. The mechanism is mounted remotely from the grasping interface, inverse to the finger interaction points, for manipulation of these points. The grasping points comprise pulleys which route the actuators through a cable tension and transmission system. A second aspect provides haptic augmentation to an operator, which indicates to the operator the state of a control input to a controlled device. A third aspect provides a means of simulating motion where haptic feedback is provided to a user in correspondence with the movement of the user within a pod environment.

A motion simulation system for providing force feedback to a user in response to movement of the user within a virtual environment comprises a virtual environment system for producing a virtual environment to the user. Cables are connected to a user interface to support the user interface in a suspended position. Actuators are associated to each cable to adjust the length of the cables. A cable tension controller is connected to the actuators and to the virtual environment system to calculate a position and orientation of the user within the virtual environment as a function of the length of the cables, and to control the actuators so as to constrain movement of the user interface as a function of interactions between the user and the virtual environment, to provide force feedback to the user. A locomotion simulation apparatus and method are provide as well.

The invention provides an integrated frequency difference method of a cable stayed bridge cable tension test. The method comprises the following steps: firstly, reading three frequency values fi, fj and fk which are corresponding to a first peak, a second peak and a third peak in an auto-power frequency spectrum graph of a tested cable actual measurement acceleration time history; secondly, obtaining a fundamental frequency initial value f by utilizing the three frequency values corresponding to the three peaks; thirdly, determining a possible order corresponding to each frequency; finally, determining basic frequency fv and cable tension T. According to the invention, calculation is simple, operation is carried out according to a process, other complex determination and processing processes are not needed, result accuracy is raised, technology difficulty in a cable tension test is substantially reduced, by employing the method, high efficiency is realized, data analysis processing time can be saved, test cost is reduced, and economy is good.

The present disclosure provides a harness adjustment system that may be used in various applications including backpacks, windsurf harnesses, kite-board harnesses, mountain climbing harnesses, utility harnesses, backpack shoulder straps, tie-down straps, and various belts for numerous applications. The harness adjustment system includes a first webbing strap, a winding reel, a cable tension member, and a strap lock. The winding reel is secured to a first portion of the strap. The cable is interconnected between a second portion of the strap and the winding reel. The cable loops from the strap to the reel such that winding of the reel retracts the cable to pull the second portion of the strap toward the first portion. The lock is coupled to the first strap second portion. The lock is selectively engageable with the second portion of the strap to relieve tension from the cable. Both cam and plate locks are disclosed.

An extendible mooring hook has a pair of jaw members spring biased to an open position with a shuttle removably retained on one jaw member. A detent mechanism engages the shuttle member when the jaw members close around a mooring post and pulls the shuttle, and attached mooring line, around the mooring post when the jaw members return to their open position. The pole portion can be extended, and a incorporates a traveler mechanism to compensate for changes in cable length so that cable tension is maintained when the pole is extended.

The measuring device includes a pressure sensor, and a rotary encoder. Characters are that the rotary encoder is fixed on one end of bull wheel spindle; being fixed on inner side plate, the slide and the top plate are connected to form a float measurement rack; the pressure sensor is installed on side of the top plate; slide holes on left side plate and right side plate are present in rectangle on central axis of the pressure sensor. Being installed at place near to exit of rope from the hoist drum, the measuring device carries out 2D follow-up measuring for tensile force and displacement when steel wire rope moves along axis and radial direction of the hoist drum. The invention provides operable technical support for automatic detection and automation control. The invention is widely applicable to harbors, engineering hoisting, and resource exploration development industries for ex. mine, geology, and ocean etc.

The invention discloses a storage winch with a function of measuring tension and length of a cable. The storage winch comprises a cable storage cylinder, a support device, a cable guide device, a driving component, a cable arranging mechanism, a warning device, a power transmission communication interface connection device, a lightning attractor, a cable tension measuring device and a cable length measuring device. For cable length measurement, two lines of independent but related proximity switches are adopted for improving work reliability and measurement accuracy; for tension measurement, a pressure sensor is adopted, and force application pin rolls at two pin joint support seats between a cable guide support and a cable arranging sliding block are used for transmitting tension of the cable. The storage winch can be matched with a friction drive winch, is applicable to storage of a large volume of cables and arrangement of cables in order based on special support cables, has functions of measuring tension and laying length of the cable, protecting the cable and guaranteeing the operation safety, and meets special task requirements on large load, good safety, reliable operation, long cable laying distance, and the like.

A drive under new automotive hail protection roof hip-and-valley cable-tension type canopy is formed by a rectangular grid pattern of rigid post assemblies joined at their upper ends by longitudinally, transversely and diagonally extending cables forming a coextensive fabric roof support.

The invention relates to a rope tension measuring device. When a hook component (12) arranged on the front end part of a device main body (11) is hung on a rope to be measured, the end part of one of a pair of arms (18a, 18b) formed on the front end part of a Y-shaped main body supporting component (17) is pressed on the rope, and the end part of the other arm is pulled to body to rotate, thus measuring tension of the rope by a sensor (13) through the hook component (12). Thereby, tension of each rope is accurately and simply measured without depending on tensioning other ropes.

The invention relates to a high-precision cable tension force test method based on model analysis, which comprises the following steps: fixing two or more acceleration sensors on a cable along the cable surface to measure and obtain cable model information; judging the cable model preliminarily, refining the test point arrangement according to a modal identification result, continuously measuring and improving the cable vibration shape, and judging whether a cable modal vibration shape test result forms a complete vibration shape model or not; correcting the sensitivity of the test result of the formed complete vibration shape model, multiplying an identification result by a sensitivity correction coefficient according to the difference of acceleration sensitivities when correcting the sensitivity, obtaining corresponding modal circular frequency omega, and fitting a finally obtained vibration shape curve and obtaining a corresponding vibration shape function, and calculating the actual cable tension force according to the function. Influencing factors controlling the calculation are all obtained by actual measurement, the test error is limited within a certain range, and the calculation result is sure to have extra high reliability.

A cable tension device includes a fixing seat, a rotation shaft, a ratchet unit, a movable seat, a safety locking plate, a control member, an engaging board, a push board, a compression spring, and a tension adjustment knob. Thus, when the cable is tightened to a determined extent by rotation of the movable seat, the force applied by the cable on the ratchet unit is greater than that applied by the engaging board and the push board on the ratchet unit, so that the engaging board is pushed and deflected by the ratchet unit to pass by the ratchet unit, and the movable seat performs an idle rotation, thereby preventing the cable from being tightened too excessively.

A fold down seat back or seat bottom has at least one ergonomic support device in it. A traction cable is operatively engaged at one end with the ergonomic support device to actuate it. The fold down seat back includes a rotating cable tension unit and a fixed torsion bar. The rotating member moves relative to the fixed member when said fold down seat back is folded up. The traction cable is comprised of a sleeve having a first end and a second end and a wire having a first end and a second end. The wire is disposed to slide axially through the sleeve. The first sleeve end is attached to the rotating cable tension unit. The wire end is attached to the fixed torsion bar. The wire end may be attached to the torsion rod with a pulley. These attachments of the sleeve end and the wire end cause the wire to be drawn axially through the sleeve when the seat back is folded up, extending or rotating an ergonomic support, and cause the wire to be relaxed when the seat back is folded down, flattening the ergonomic support. The ergonomic device may be a bolster, a wire array, a head rest, an arching pressure surface or a scissors lumbar support.

The invention relates to a construction method for demounting a cable-stayed bridge fast. An anchor is hard to be removed under the condition that a stayed cable has cable tension, a special tool is used for transforming the stress of an upper anchor ring, a cable and a lower anchor head into zero, then an upper anchor head is cut by compulsion, the cable is chopped up, and the lower anchor head is removed for saving the anchor-removing time, so as to change cables fast. A punching tensioning jack is installed at an anchor pipe opening of the cable. A tension rod is arranged in the jack. The tension rod tensions after penetrating into a tool anchor ring. The tool anchor ring is screwed into the tail end of an anchor head to replace an old anchor ring, and the old anchor ring is taken out by cool cutting. The jack is moved to the tail of the tension rod by the repeated tension and release of the tool anchor ring to ensure that the cable still has 30 to 40 tons of tension. Two sets of cable clamps are used for clamping two ends of the cable to be chopped up. A windlass pulley set is connected between the cable clamps. The pulley set is frapped to transform the internal force of the cut section of the cable into zero and chops the cable. A hoisting apparatus is used for taking out the cut cable on a tower. A hollow drill rod is used for drilling concrete or epoxy mortar in a cable anchor pipe at the end of a beam. The punching tensioning jack is used for pulling out the anchor head by compulsion.

The invention relates to a progressive health monitoring method for a cable system in a cable structure on the basis of cable tension monitoring. On the premise of taking cable tension as the monitored value, the progressive health monitoring method considers that linear relations among a current value vector of a monitored value, an initial value vector of the monitored value, a value change matrix of the unit damage monitored value and a current nominal damage vector are approximate, and particularly nonlinear relation characteristics between the vectors are more obvious when the number of damaged cables is numerous or the damage degree is larger. The invention provides the method for piecewise approximation of nonlinear relations by the linear relations on the basis of cable tension monitoring in order to overcome the defects. The method splits a large section into a plurality of continuous subsections; the linear relations in each subsection is accurate enough; and a non-inferior solution of a current cable damage vector can be calculated in each subsection by a proper algorithm such as a multiobjective optimization algorithm, so that the position and the damage degree of a damaged cable can be accurately determined.

A marine seismic exploration method and system comprised of continuous recording, self-contained ocean bottom pods characterized by low profile casings. An external bumper is provided to promote ocean bottom coupling and prevent fishing net entrapment. Pods are tethered together with flexible, non-rigid, non-conducting cable used to control pod deployment. Pods are deployed and retrieved from a boat deck configured to have a storage system and a handling system to attach pods to cable on-the-fly. The storage system is a juke box configuration of slots wherein individual pods are randomly stored in the slots to permit data extraction, charging, testing and synchronizing without opening the pods. A pod may include an inertial navigation system to determine ocean floor location and a rubidium clock for timing. The system includes mathematical gimballing. The cable may include shear couplings designed to automatically shear apart if a certain level of cable tension is reached.

A novel watercraft lifting system for raising a watercraft to different positions relative to water and docks at least includes: at least one motorized winch adapted to be coupled via lift cables to a watercraft lift, the watercraft lift adapted to carry the watercraft thereon; a control unit coupled to the motorized winch to control the operation of the motorized winch; a cable tension detector adapted to detect the tension in the lift cables, and coupled to the control unit; and a user control transmitter adapted to transmit user-chosen RF control signals to the control unit. The control unit further at least includes a receiver adapted to receive the RF control signals, and the cable tension detector indicates that a watercraft has reached a buoyant level when the tension in the lift cables fall below a predetermined threshold.

The invention relates to a control system and a control method for a marine geological winch based on environmental parameter analysis. The control system for the geological winch adopts a hierarchical structure model design method and function modularization means to realize automation for a winch control process; automatic control is realized for three main procedures of cable contracting and releasing mode selection, cable discharge speed and winch braking in the winch control process, so that long-term unattended requirement can be met. The control system for the marine geological winch is used for receiving the shipping information data of ship-borne equipment such as GPS (Global Positioning System) position, ship heading and the like and surveying equipment data such as flow velocity, flow direction and the like and the operating data of the winch such as cable outlet length, cable discharge speed, cable tension and the like; the operations of deciding, sending and carrying out the control commands of the winch are automatically completed. The control system and the control method solve the practical problems of high practicability, poor emergency and the like in the traditional winch control process, so that the degree of controlling the winch by manpower participation is reduced, the manpower cost is reduced, and the sampling efficiency of marine research is improved.

The invention discloses an intelligent cable capstan device. The intelligent cable capstan device comprises a capstan winding roll, a motor, a tension sensor and a controller, wherein the capstan winding roll is used for winding or unwinding cables; the motor is provided with a motor driver and electrically connected with the capstan winding roll and controls rotation of the capstan winding roll; the tension sensor is electrically connected with the capstan winding roll and used for collecting the tension information of the cables; and the controller is connected with the motor driver and the tension sensor through a converter, and the controller sends a control command to the motor driver so as to control the motor driver to operate and sends an adjusting command to the motor driver according to signals of the tension information, collected by the tension sensor, of the cables so as to adjust and control the rotation speed of the motor driver. By the adoption of the intelligent cable capstan device, automatic winding and unwinding of the cables are achieved in the constant cable tension state, a high-precision photoelectric encoder is arranged, the advancing distance of a crawl device is motored indirectly by measuring and computing the unwinding length of the cables, and the winding action and unwinding action of the cables are adjusted automatically; and labor is saved, lag of the cables in pipelines are avoided effectively, and normal walking of the pipeline climbing device is guaranteed.