71 results about "Ground force" patented technology

An exoskeleton bracing system includes: a trunk support for affixing to the trunk of a disabled person and leg braces for connecting to the legs of the person, each leg brace including limb segment braces. Motorized joints are adapted to provide relative angular movement between the limb segment braces of the leg braces and between the leg braces and the trunk support. One or more ground force sensors are designed to sense ground force exerted on each of the leg braces. The system also includes a controller for receiving sensed signals from said one or more ground force sensors, with an algorithm for identifying a stance from the sensed signals and, based on the identified stance, actuating the motorized joints to perform an action relating to a mode of locomotion selected from a set of predefined actions corresponding to the identified stance.

The invention relates to a custom-fitting, asymmetric ballet shoe with a shell (9) and liner (13) that enables the dancer to stand en pointe and perform the extreme movements required by ballet choreography with minimal discomfort, pain, and injury to the foot caused by the various aerial ballet maneuvers called for by both traditional and modern choreography. The shoe of the present invention is designed to redistribute the dancer's weight and the ground force reactions associated with dancing en pointe evenly across the toes while translating some of the force away from the distal aspect of the dancer's toes to the rest of the foot. The shoe has a removable cosmetic cover (18) to enable, inter alia, the color and design to be varied according to costume design and the cover's replacement when the fabric is worn, thereby extending the useful life of the remainder of the shoe.

The present invention is a method of processing seismic data in which one or more seismic vibrators are activated with one or more pilot signals and vibrator motions are recorded along with seismic data. Vibrator signatures are computed from measured vibrator motions, such as the ground force signal. A desired impulse response is specified from either a measured vibrator motion or from test data or field data from a location near the location from which the seismic data was acquired. A deconvolution filter is computed from the impulse response and the vibrator signature. Alternatively, a single separation and deconvolution filter is derived from the impulse response and from vibrator signatures from multiple vibrators and sweeps. The deconvolution or deconvolution and separation filter is used to process the seismic data. The vibrators are then moved to a new location, and the activation is repeated.

Systems and methods are presented that use the rate of change of a legged robot's centroidal angular momentum ({dot over (H)}G) in order to maintain or improve the robot's balance. In one embodiment, a control system determines the current value of {dot over (H)}G, compares this value to a threshold value, and determines an instruction to send to the robot. Executing the instruction causes the robot to remain stable or become more stable. Systems and methods are also presented that use a value derived from {dot over (H)}G in order to maintain or improve the robot's balance. In one embodiment, a control system determines the location of the Zero Rate of change of Angular Momentum (ZRAM) point (A), determines the distance between A and the location of the center of pressure of the resultant ground force, compares this value to a threshold value, and determines an instruction to send to the robot.

A ground force control circuit (162) for an articulated harvesting head is provided that comprises, an ECU (164); and a first hydraulic control valve (166, 170) driven by the ECU (164), wherein the first hydraulic control valve (166, 170) is coupled to at least one actuator (158, 160) and is configured to maintain a constant pressure in the at least one actuator (158, 160).

A tensioner assembly that includes a base, an arm, an opening spring (i.e., a torsion spring that opens or radially expands with increasing torque applied thereto), a spring reaction member, and a pivot bushing. The tensioner assembly is configured to orient various loads in predetermined directions. For example, a spring load can be oriented to counteract a hub load to reduce a bushing load that acts on the pivot bushing. As another example, a spring reaction force exerted by the spring reaction member can be employed by a damping mechanism to generate a grounding force that is parallel to the spring reaction force and is directed to intersect an axis about which the arm pivots relative to the base. A tensioner assembly having improved assembly characteristics is also provided.

An adapted seismic vibrator for obtaining a true ground force comprising: a baseplate pad; a baseplate drive system, wherein the drive system is connected to the baseplate pad and moves the baseplate pad up and down; a vibrator controller electronics, wherein the electronics are connected to the drive system and causes the drive system to move the baseplate pad up and down; and a plurality of load cell sensors disposed between the baseplate pad and ground, wherein the sensors measure the vibrator output force during a sweep. A method of obtaining a true ground force sweep comprising the steps of: using the load cell sensors to measure an actual output force of a seismic vibrator and electronics to obtain an actual ground force data; using inversion to invert the actual ground force data and desired original pilot sweep to obtain a revised pilot sweep that produces a true ground force sweep; and entering the true ground force sweep into the electronics.

A method of controlling an exoskeleton bracing system to walk includes identifying an expected current stance, receiving a tilt signal from a tilt sensor, and receiving a ground force signal from ground force sensors. Motorized joints are actuated to forwardly extend a leg brace when the expected stance includes standing with the leg braces together, the tilt signal indicates tilting forward, and the ground force signal indicates leaning on an opposite leg brace. Motorized joints are actuated to extend a trailing leg brace forward beyond a forwardly extended leg brace when the expected stance includes a forwardly extended leg brace and a trailing leg brace, the tilt signal indicates tilting forward, and the ground force signal indicates leaning on the forwardly extended leg brace. Motorized joints are actuated to converge both leg braces to a standing stance when the ground force signal indicates leaning on a trailing leg brace.

An insole which provides cushioning and support to a user's foot subjected to ground forces and / or differing weather conditions encountered during active sports, for example triathlons, is herein disclosed. The insole comprises a base having a bottom side which defines recesses adapted to receive pads and pods having particular properties. The location and materials of the various pads and pods work together to provide ankle and foot stabilization, enhanced cushioning features, and resistance to insole movement during shoe operation.

The invention discloses single prosthetic walking aided training equipment, which comprises medical treatment shoes and a monitor; wherein the medical treatment shoes can perceive the ground force and connected with the monitor; the bottoms of the medical treatment shoes are provided with a plurality of force sensors which transduce the change situation of the sole force by a circuit wafer and a controller, and the change situation of the sole force is displayed by the monitor in real time; a trainee regulates the movement beside the prosthesis according to the variation law of the sole force of a health limb to cause that the force law of the sole of the prosthesis is closes to the health limp, thus accelerating the training process and reducing the training cost. The equipment can intuitively display the force situation of the sole of a prosthetic installer during the walking train so that the trainer correctly regulates the size and balance of the walking force, thus achieving the purpose of reducing the training burden and difficulty and causing the trainer to be quickly suitable for the prosthetic walking.

The present invention relates to a large tank hanging static testing device which comprises a strengthening cap (9), upright columns (10), a steel frame (11), pull rods (13), a test platform (25), ground force bearing points (26), force loading equipment (27), force bearing ground rails (28), and a foundation (29). Multiple cantilevers are uniformly distributed in a radial way at the hanging part at the top end of the testing device and the periphery of the strengthening cap (9). Each of the cantilevers is provided with a through hole, and the force bearing points (26) around the test platform (25) and the through holes in the strengthening cap (9) cantilevers are orderly connected by multiple groups of pull rods (13). A test piece is fixedly connected to the strengthening cap (9) through the static force loading equipment steel frame (11) and is suspended in a cylindrical space with the strengthening cap (9) as the ceiling and the upright columns (10) as support walls. By using the large tank hanging static testing device, chip level front bonding low temperature combined static test of a model is smoothly completed, and a solid test technology reserve is made for the implementation and development of the low temperature static test of follow-up models.

The invention relates to high ground stress soft rock tunnel stress release technology and provides a ground stress release method for a high ground stress soft rock tunnel positive step excavation; the method comprises the following steps of: excavating at the upper part of a tunnel to form an upper step (1), then drilling a plurality of boreholes (3) on a working face (4) of the upper step along the direction of tunnel excavation so that the ground stress acts on the boreholes, consumes the energy of the ground stress in a deformation process and releases the ground force. The method achieves the purpose of effectively controlling the deformation of ground stress rock tunnel surrounding rocks and provides security guarantee for subsequent tunnel excavation.

The invention discloses a method of measuring a distance between ground force bearing points of a plane and a system. The plane is drawn on three weighing platforms, and positions of force applying points on the weighing platforms can be conveniently and accurately measured by adopting a torque balancing principle. The advantage that force borne by four weighing sensors on each weighing platform can be independently outputted is used, the torque balancing principle is adopted, the positions of force applying points on the weighing platforms can be conveniently and accurately measured, distances between ground force bearing points of the plane measured by the method are the positions of ground actual force applying points, the fact that the traditional length measurement tool such as a tape measure is used for measuring the connection line length of plane wheel geometric center points rather than the ground actual applying points of the plane wheels, and thus the plane gravity center measurement result is influenced can be avoided, the method provides accurate distance parameters for calculating the gravity center of the plane, and the calculated plane gravity center data can be ensured to be accurate and reliable.

The invention belongs to a wind-water mixing spray technology which can be applied in underground comprehensive mining, comprehensive digging and in places requiring settling dust so as to improve safe production of a coal mine. The invention is characterized in that the technology is realized through the steps as follows: a wind source pipeline which is connected from a ground forcing fan to an extraction working surface with a selectable wind pressure of between 0.5 and 0.7MPa is in parallel connection with a water source pipeline which has certain pressure with a selectable hydraulic pressure of between 3 and 5MPa, and the volume ratio of the mixed wind and water is between 100-135 to 1; the wind source pipeline and the water source pipeline are both connected to nozzles of internal spraying and external spraying of a coal mining machine and a mechanical boring machine, so that wind-water mixing atomized water vapor is sprayed with a flow rate of between 15 and 20M<3> / minute; and the atomized water vapor captures coal dust, and disperses local gas generated during cutting a coal body. The invention aims to solve the problems caused by the local gas which is generated during settling dust and cutting coal and can not be dispersed in time, such as safety threat in production, water resource waste, affected coal quality, slipping belt, slipping goods, bin blockage or other problems.

An article of footwear includes an outsole having first and second treads constructed from a first material and defining first and second ground contacting surfaces. The second tread includes a layer of a second material below the first material, the second material being less abrasion resistant than the first material. The second ground contacting surface of the second tread extends below the first ground contacting surface of the first tread. The second tread is configured to move upward when the second ground contacting surface engages a ground surface to distribute a ground force upon both the first tread and the second tread. The second material of the second tread is abraded by the ground surface less than it would have been had the second tread remained at the second distance upon application of the ground force.

An article of footwear includes an outsole having first and second treads constructed from a first material and defining first and second ground contacting surfaces. The second tread includes a layer of a second material below the first material, the second material being less abrasion resistant than the first material. The second ground contacting surface of the second tread extends below the first ground contacting surface of the first tread. The second tread is configured to move upward when the second ground contacting surface engages a ground surface to distribute a ground force upon both the first tread and the second tread. The second material of the second tread is abraded by the ground surface less than it would have been had the second tread remained at the second distance upon application of the ground force.

Described herein are embodiments of an electromagnetic system that can be used to replace the traditional hydraulic oil systems that actuate mass movement. The embodiments described herein provide wide frequency range operation, ground force application with high fidelity, and low environmental impact. Embodiments described herein can be used for seismic exploration and vibroseis applications, among other uses.

The invention discloses a heavy manned walking robot steering-by-wire system road feeling simulation method, which relates to a mode of enhancing the manipulation telepresence and aims at solving the problem of inaccurate manipulation due to missing of the road feeling information during a process to manipulate steering of the walking robot in an electric signal mode. The steering manipulation mode is determined firstly; then, a theoretical moment applied to the gravity center by a foot-ground force during the robot steering process is deduced; then, through a leg hydraulic cylinder movement-mechanical model, the actual torque of each joint is calculated, and an analytical moment applied to the gravity center by the foot-ground force during the robot steering process is deduced; and finally, sliding mode control is adopted, a road feeling motor in the steering-by-wire system simulates a high-fidelity foot-ground contact moment, and the high-fidelity foot-ground contact moment is fed back to a driver. Thus, the contact information when the robot and the road surface mutually act can be reduced in real time, and the stability and the accuracy of robot manipulation by the driver can be improved. The method of the invention is applicable to the technical field of walking robot manipulation.

The present invention provides a vibroseis harmonic wave suppressing method based on a predictive filtering method and a pure phase shifting method. The method comprises a first step of inputting cross-correlation seismic records and corresponding ground force signals after pure phase shifting treatment; a second step of applying the pure phase shifting method to suppress harmonic interferences of a local blast; a third step of applying the predictive filtering method to suppress harmonic interferences of an adjacent blast; and a fourth step of acquiring vibroseis scanning data after the whole continuous harmonic interference suppression. With adoption of the vibroseis harmonic wave suppressing method provided by the present invention, interfering noises from adjacent blasts can be well suppressed, harmonic interferences inside a blast can also be partially removed, and a harmonic wave suppressing method of vibroseis mass seismic data is realized.

The invention discloses a standard planting method for rhizoma bletillae and blueberry intercropping. The method adopts the rhizoma bletillae and blueberry intercropping patterns, and comprises the following steps of: A good seed selection; B. land selection and field settlement; C transplanting and planting; D. field management; E harvest. The standardized planting method for rhizoma bletillae and blueberry intercropping makes full use of the beneficial relationship between rhizoma bletillae and blueberry, and makes up a reasonable composite group structure, and fully utilizes light energy and ground force to ensure stable production and increase. The 3-year-old rhizoma bletillae can yield up to 500kg / mu (fresh) and 110kg / mu (dry) in normal years, and the high yield of rhizoma bletillae is achieved; the planted blueberry seedlings can be harvested, and the blueberry fresh fruit output can reach 800kg / mu. The high utilization ratio can effectively solve the contradiction of arable landtension, and the method has the advantages of large planting scale, increasing production and income, high quality and high efficiency, and can achieve good economic benefit, social benefit and ecological benefit.

In a crop harvesting header with a center section and two wings where each wing is pivotal relative to the center section about a pivot axis extending in a generally forward direction which includes a balance system to maintain a balanced ground force distribution across the width of the header there is provided an automatic adjustment system for maintaining proper balance. The system includes angle or other sensors which detect the pivot angle of the wing section. This can be used in a static testing system where the position to set to a detected midpoint and / or in a dynamic system where repeatedly, over a time period during which the header is operating, data is detected relating to the positions of each wing frame portion.

The invention relates to a reconstructed ground force signal-based vibroseis harmonic wave suppression method. According to the method, when ground force signals cannot be estimated by a weighted summethod, on the basis of a characteristic that the arrival time of direct waves is inconsistent with the arrival time of other seismic waves, a proper matched filter is adopted to effectively separateand extract direct waves from signals near a substrate, so that the extracted direct waves can be adopted as reconstructed ground force signals and replace the actual transmitted signals of a vibroseis; and deconvolution processing is performed on seismic records, so that harmonic waves can be suppressed. The method does not replay on the control mode and specific coupling condition of the vibroseis, can suppress harmonic waves and greatly improve data quality. The method just has low requirements for the control method and control accuracy of the vibroseis, does not impose strict limitationson coupling between the vibroseis and the ground surface, and allows the vibroseis to adopt a low-cost open-loop control mode. The method has the advantages of wide application range, small target positioning error, is not only suitable for hydraulic vibroseis harmonic suppression, but also is suitable for open-loop control or harmonic wave suppression of various vibroseises with poor coupling conditions.

The invention discloses a ground expansion deformation control and force-bearing protection method for a plant for vehicle passing. According to the method, expansion joints are arranged in a ground structure of the plant for vehicle passing to conduct ground expansion deformation control, and meanwhile, expansion joint force transmission structures are arranged in the expansion joints to conduct ground force-bearing protection. The method is characterized in that horizontally-arranged plate-like members are adopted in the expansion joint force transmission structures to enable the two ends of each expansion joint force transmission structure to be connected to the two side walls of the corresponding expansion joint, and at least one end of the expansion joint force transmission structure is a free end which is not restrained in the horizontal direction. By means of the method, while the function of the ground expansion joints is not affected, the force bearing and transmitting effects of the ground on the two sides of the expansion joints can be improved, and the ground protection effect is improved.

The invention relates to a seismic exploration system for petroleum exploration. The seismic exploration system comprises a remote monitoring terminal, controllable vibroseis and a plurality of wave detectors; the controllable vibroseis comprises a mobile device, an air pump, a transmission shaft and a vibroseis generating mechanism, the air pump and the transmission shaft are arranged under the mobile device in a vertically-downward mode, and the air pump is in transmission connection with the vibroseis generating mechanism through the transmission shaft. According to the seismic exploration system for petroleum exploration, the vibroseis generating mechanism is controlled by the air pump to rise and fall, the weight of the mobile device is completely added to a plate, and therefore the pressure weight of the controllable vibroseis is increased; meanwhile, vibration isolation can be conducted on ground force borne by the plate through a vibration isolation air spring, therefore, the plate is prevented from being decoupled, and the seismic exploration reliability is improved; furthermore, a reaction counterweight is balanced through two balance springs when the reaction counterweight generates angular deflection, the reliability that the reaction counterweight acts on the plate is guaranteed, and the seismic exploration reliability is further improved.