56results about How to "Eliminate degrees of freedom" patented technology

A bistatic radar system having a transmitter that generates unique signals at spatially independent transmitter degrees of freedom and a receiver that filters the signal at each receiver degree of freedom into a group of signals identical in number to the number of transmitter degrees of freedom. The receiver formats the filtered signals into a 2-dimensional array of elements. The receiver rotates the array so that the new axes are aligned with the Doppler gradient. The data is then re-sampled and projected to linearize the clutter signal. The receiver may be integrated with a broad class of adaptive and non-adaptive clutter mitigation approaches such as electronic clutter tuning and projected bistatic space-time adaptive processing, or STAP.

Improved camera calibration techniques, including an improved up look angle and an improved method for calibrating a virtual center of projection. By using a view camera technique for the up look angle, the image sensors can be mounted flat to a Printed Circuit Board (PCB). By using a sub-region of the image sensor for the active area of the camera it is possible to calibrate the virtual center of projection (C′).

Improved camera calibration techniques, including an improved up look angle and an improved method for calibrating a virtual center of projection. By using a view camera technique for the up look angle, the image sensors can be mounted flat to a Printed Circuit Board (PCB). By using a sub-region of the image sensor for the active area of the camera it is possible to calibrate the virtual center of projection (C′).

One embodiment of present invention is a segmented instrument having braking capabilities that includes an elongate body having a plurality of links and a hinge connecting a pair of adjacent links in the plurality of links. There is also brake assembly coupled to each link in the pair of adjacent links and positioned to span the distance between the pair of adjacent links. Another embodiment of the present invention is a segmented instrument having a plurality of links and at least one lockable and articulatable joint positioned to connect a pair of adjacent links in the plurality of links. In addition, the at least one lockable and articulatable joint is adapted and configured to increase the number of frictional surfaces available between the pair of adjacent links. There are also provided methods for controlling a segmented instrument. Exemplary steps of the method include introducing a segmented instrument into a patient where the segmented instrument has a plurality of links wherein adjacent links are joined by a hinge. Next, there is the step of manipulating the links about the hinges to maneuver the segmented instrument to provide access to a surgical site within the patient. In one aspect, the manipulating step produces a sliding motion between a plurality of complementary shaped components within a portion of a brake assembly between adjacent links. Next there is the step of actuating the brake assembly to substantially prevent movement about the hinge of the links attached to the braking mechanism.

An apparatus and method for locking a detonating cord against a shaped charge.

A system and method for providing a folding load bearing hard tonneau cover which includes a hinge / connection element using a novel friction stir welding method to weatherproof the bed contents, wherein each folding section is constructed using friction stir welds for strength, stiffness and visual appeal, wherein the system does not rely on attached bed rails to support and lock the cover because loads are reacted on the bed caps, wherein a spring loaded latching system has the strength to react the moments generated by heavy loads on top of the cover, wherein installation does not require modification to the bed, and wherein the tonneau cover may carry heavy loads on top that are easy to secure, while still allowing a cover that folds open.

The invention relates to a helicopter rotor system elastic bearing load measuring device. The helicopter rotor system elastic bearing load measuring device comprises a measurement base, an X axis direction testing mechanism, a Y axis direction bending testing mechanism, a Z axis direction bending testing mechanism, an alignment locking mechanism and a torsion testing mechanism in the X axis direction. The measurement base is composed of a detecting platform base, a rotating shaft and a bearing large-end clamp and arranged at the bottom of the helicopter rotor system elastic bearing load measuring device. The X axis direction testing mechanism is arranged on the top of the helicopter rotor system elastic bearing load measuring device, and the torsion testing mechanism in the X axis direction, the alignment locking mechanism, the Y axis direction bending testing mechanism and the Z axis bending testing mechanism are correspondingly arranged on the lower layer, the middle layer and the upper layer of the helicopter rotor system elastic bearing load measuring device in sequence from bottom to top along the axis lead in the X direction. Through the helicopter rotor system elastic bearing load measuring device, the rigidity characteristic detection on different models of helicopter rotor system elastic bearings can be performed on one detecting platform, and university is good. The detecting efficiency and the safety of personnel in the detecting process are improved, the detecting strength is reduced, the elastic bearings can be clamped on one detecting platform at a time, and force (torque) in multi-dimensional directions can be loaded and measured.

A fixture for a laser welding machine for large-diameter thin-walled parts comprises a supporting positioning portion, a seam alignment mechanism and a clamping mechanism. The supporting positioning portion comprises a fixing rack and a fixture; two arc plates used for supporting the large-diameter thin-walled part are disposed on the left and right sides of each end of the fixture; the top of the fixture is provided with a mounting groove in the length-wise direction; a base plate is disposed at the bottom of the mounting groove; two iron pads are disposed on the base plate; the upper surface of each iron pad is a slant inclining inside to outside; the upper surface of each iron pad and the horizontal plane form an included angle of 3 degrees; a passage air duct is formed between the two iron pads; each of the same ends of the iron pads is provided with a positioning block and a positioning pin; a sucker stop at the same end with the positioning pin is disposed on one iron pad. The fixture is reasonable in design and simple in structure; the problem that the thin-walled parts with long length-to-diameter ratio are difficult to butt during laser welding is solved; the problems, such as edge locking, material loss and welding arc pits, are avoided during butt welding.

A head protecting frame used for prone position operations and capable of preventing pressure ulcers comprises a head support frame, a mirror surface base, a face gel combined support pillow and a lifting adjusting device, wherein a pillow interior storage cavity is defined by a head top limiting flange, face limiting flanges, a lower jaw limiting flange and the bottom of the head support frame; a lower jaw avoiding notch is formed in the center of the lower jaw limiting flange, a five-sense-organ part avoiding opening is formed in the bottom of the pillow interior storage cavity, and an inner limiting flange is arranged on the periphery of the five-sense-organ part avoiding opening; the face gel combined support pillow comprises a sponge support die support and a gel face contact layer, and a five-sense-organ avoiding notch is formed in the face gel combined support pillow; the face gel combined support pillow is mounted in the pillow interior storage cavity, the mirror surface base is arranged below the head support frame, and the head support frame and the bottom mirror surface are integrally connected through the lifting adjusting device. The head protecting frame not only can protect the face of a patient from extrusion to facilitate observation of a doctor, but also can be adjusted freely in height, and the best operation position of the patient is guaranteed.

A structure system capable of achieving double-point hanging conversion and separation for a parachute includes a connection and separation mechanism (4), hanging slings (3), main parachute separationdevices (2), and dampers (1). Through reasonable configuration with a drag parachute cluster parachute system and a main parachute cluster parachute system, and under driving of an initiating explosive device, connection and separation of a drag parachute can be completed in a normal working mode, a main parachute bag is pulled out, connection and hanging conversion of a main parachute cluster parachute are performed, a heat-proof layer is pulled off, impact overload of the hanging conversion is reduced, and unlocking separation of the main parachute cluster parachute is completed; in addition, self-adaption of a work mode of single drag parachute failure of the drag parachute cluster parachute system can also be completed; under judgment of a control program, work modes of landing on water and ground are selected by the initiating explosive device; and a redundant unlocking device for the drag parachute enables the reliability to be improved. The system has the characteristics of large carrying capacity, multiple work modes, high reliability, and the like, and can be widely applied to occasions of connection and separation of cluster parachutes.

A mobile apparatus is provided that is able to equip any object of value, such as a watch or piece of jewellery, and protect it. The present mobile apparatus includes: an electronic module able to execute a mobile application, a display screen connected to the electronic module and arranged to display information relative to the mobile application, and a fastening support whereof the shapes and dimensions are arranged so that the mobile apparatus can successively equip any object of value, and to be able to fasten, removably and by superposition, at least one display screen to an object of value when object of value is attached around part of a human body. In addition, the mobile apparatus covers at least part of a surface of the object of value designed to be easily visible by the person when the object is worn.

The present invention relates to a therapeutic, diagnostic or surgical tool, e.g. surgical guide frame for medical treatments, comprising: —a rigid structure, and —at least one functional guidance element (13), wherein the rigid structure comprises means for positioning and holding the rigid structure around a soft tissue area of a patient and includes means for compressing the soft tissue area surrounded by the positioning and holding means as well as to the use of such a therapeutic, diagnostic or surgical tool for medical treatments, especially in areas where the therapeutic, diagnostic or surgical tool, e.g. surgical guide is supported on soft tissue.

A wearable motion tracking system (12) for capturing a relative position between a first body part (101) and a second body part (103) of said user (100) comprising a first measurement device (120a), a second measurement device (121a) and a computing device (150) that are configured such as to obtain by said computing device (150) a plurality of measurements between said first and second measurement devices (120a, 121a). Based on the plurality of measurements that comprises at least one distance measurement between said first and second measurement devices (120a, 121a) said computing device (150) is configured to compute, in three dimensions, a position of said second measurement device (121a) relative to said first measurement device (120a) for tracking the position of said second body part (103) relative to said first body part (101). The present invention further relates to a method of motion tracking.

It comprises a method of exploring the flexibility of macromolecules, where an available ensemble of structures of a receptor, such as one coming from a molecular dynamics trajectory or a set of experimentally derived structures, is used to generate an ensemble of structures for a closely related receptor, such as a receptor mutant, a receptor with a series of post-translational modifications, or one that is non-covalently bound to a second molecule. In this way, new ensembles of the pertubed receptor can be accessed without the need to explicitely simulate the new system. The method allows the study of structure and flexibility of derivatives and relatives of a receptor in a computer efficient manner, and therefore has applications in the rational-drug design field, especially in virtual screening. It also comprises a computer program product for causing a computer to perform the method, as well as a system of molecular modeling comprising computer means for carrying out each of the steps of the method.

A method of holding a part (5, 16) in position in an assembly station (1), in which the part (5) is put into a determined position in the frame of reference of the assembly station (1) by way of a handling robot (7), at least one clamp (2, 3, 4) is closed onto a portion (5a, 5b) secured to the part, the clamp being mounted to slide freely in a guide (12) of the assembly station (1) extending parallel to its own clamping direction, and the clamp is blocked against sliding when it is clamped onto the part.

The invention discloses a soil clearing shovel for a turning and throwing machine, and relates to the technical field of environment-friendly machinery manufacturing. The soil clearing shovel for the turning and throwing machine comprises a shovel body and a hoisting oil cylinder, wherein the shovel body is provided with a shovel top surface, one end of the hoisting oil cylinder is hinged onto a machine body, the other end of the hoisting oil cylinder is hinged to a bracket, the bracket is respectively hinged to the shovel body through a first rocker rod and a second rocker rod, and a reset spring is hinged between the shovel body and the bracket. Compared with the prior art, the soil clearing shovel has the advantages that obstacles can be automatically avoided, and the problems that an existing soil clearing shovel needs to be manually controlled for avoiding obstacles, and the operation is complicated are solved.

The invention discloses a reverse parallel rod 3D printer with a movable working-platform and belongs to the technical field of digital machining and aims at the problems that existing 3D printers adopt fixed platforms and use stepping motors for driving printing nozzles to move downwards, in this way, the wiredrawing phenomenon is caused often due to limitation of wire outlet speed of extruding heads and moving speed of the nozzles, consequently, the roughness of a part of surfaces of printed parts is high, and the printing quality is affected. Three sets of reverse parallel rods are driven by a stepping motor to drive a printing platform to move, meanwhile, printing nozzles are fixed, the above problems are avoided, and the problem that the printing quality is affected due to wiredrawingis solved.

The invention provides a valve bracket mounting structure, a valve bracket and an air conditioner outdoor unit. The valve bracket mounting structure is used for fixedly mounting the valve bracket to a chassis of the air conditioner outdoor unit and comprises constraining structures which are matched with each other and separately arranged on the chassis and the valve bracket. In the matched status, the constraining structures constrain movement of the valve bracket relative to the chassis so as to prevent overturning of the valve bracket. By adoption of the valve bracket mounting structure, the problem that the valve bracket is prone to overturning in the fixing and mounting process can be effectively solved, and the mounting efficiency is improved accordingly.

A method and apparatus for moving and positioning a gripping unit (3; 23; 43), in which method the gripping unit is moved and positioned by intermediation of cables (9, 10, 11, 12; 29, 30, 31; 48, 49, 50), so that at least one degree of freedom of the gripping unit is removed by fastening the gripping unit mechanically (4; 24; 44) to the support structure. The invention also relates to a robot (1; 21; 41) provided with this kind of apparatus.

The invention discloses a slipper type 3D printer with parallel connecting rods and a movable platform, and belongs to the technical field of digital machining. The invention aims to solve the problems that a current 3D printer adopts a fixed platform, and a printing heat is driven by a stepping motor to move; this way is restricted by the wire speed of an extrusion head and the movement speed ofthe printing head, and accordingly wiredrawing phenomena frequently occur, resulting in high partial surface roughness of printed parts and influence on the printing quality. A printing platform is driven to move by the stepping motor through three groups of parallel connecting rods, and meanwhile the printing head is fixed; and the above problems are avoided, and the problem of the printing quality due to wiredrawing is solved.

Elongated strands, particularly wood strands, are deposited on a molding belt or a conveyor belt so that the strands are longitudinally oriented relative to each other for manufacturing panels known as oriented strand boards. For this purpose the strands are discharged onto an alignment mechanism or head that has a plurality of rotation shafts each carrying a plurality of disks axially spaced from one another along the respective shaft. These disks form alignment channels when the shafts rotate. Each channel or channel section is further subdivided into strand alignment chambers by a plurality of paddle elements. Preferably four such paddle elements are mounted to the respective rotation shaft between two neighboring disks thereby forming four pass through chambers between two neighboring disks.

The invention discloses a connection rod structure-based cascade wind tunnel rotation window support mechanism. The connection rod structure-based cascade wind tunnel rotation window support mechanismcomprises rotation windows, a substrate, support beams, a shaft and lining pads, wherein the support beams are in linkage with the rotation windows, the shaft penetrates through a circle center holeof a left rotation window and a right rotation window, two pairs of support beams are arranged at two sides of the rotation windows, one of the two pairs of support beams is in a horizontal direction,the other pair of support beams is in a vertical direction, one end of each support beam is fixedly arranged on the base by a bolt, and a round ring is arranged at the other end of each support beam.Gravity of the rotation windows are borne by the support beams, the strength, the rigidity and the rotation accuracy of the rotation window support mechanism can be improved, and the friction force between the rotation windows and the base is reduced on the premise that the manufacturing cost is not increased; a stable triangular support structure is formed between the support beams at the two sides and the base, all freedom degrees of the rotation windows rotating a part except an axis are eliminated, so that the mechanism is suitable for a horizontal type experiment table and is also suitable for a vertical type experiment table; and the support mechanism is low in production cost and simple in manufacturing cost and is particularly suitable for a planar cascade wind tunnel experiment table for teaching.

The invention provides a barrier fixing device of vehicle collision test, and relates to vehicle collision test. The barrier fixing device comprises a collision wall, barrier connecting pieces, a collision barrier and fixing pieces, wherein the collision wall includes multiple grooves; the barrier connecting pieces can be maintained in the grooves selectively and move along the grooves; the collision barrier is used for offset or angular collision and connected with the barrier connecting pieces; and the fixing pieces can be connected with the barrier connecting pieces, and fit to the sidewall of the collision wall at one end of the grooves to prevent the barrier connecting pieces from moving in the grooves. The movement degree of freedom of the barrier connecting pieces along the groove direction is reduced by the fixing pieces, the barrier connecting pieces are prevented from moving along the groove direction, and the problem that the collision barrier connected with the barrier connecting pieces moves in the collision process is solved fundamentally.

The invention belongs to a constant-speed valve and relates to a single-stage constant-speed valve used for a high-pressure kerosene constant-speed hydraulic motor, in particular to a high-reliability integrated large-flow single-stage constant-speed valve used for a constant-speed hydraulic motor driven by high-pressure kerosene. The single-stage constant-speed valve comprises a valve shell, a throttle valve and a compensation valve. The throttle valve is fixed in a cavity inside the valve shell. The compensation valve is fixed in the other cavity inside the valve shell. In the valve shell, an outlet of the cavity where the throttle valve is located communicates with an inlet of the cavity where the compensation valve is located. A damping hole is formed in the valve shell and enables an inlet of the cavity where the throttle valve is located to communicate with the cavity where the compensation valve is located. The single-stage constant-speed valve is simple in structure, high in reliability, low in machining cost, easy to assemble and adjust, high in integration level, capable of fixing and controlling the steady state rotation speed difference, and easy to operate.

One embodiment of present invention is a segmented instrument having braking capabilities that includes an elongate body having a plurality of links and a hinge connecting a pair of adjacent links in the plurality of links. There is also brake assembly coupled to each link in the pair of adjacent links and positioned to span the distance between the pair of adjacent links. Another embodiment of the present invention is a segmented instrument having a plurality of links and at least one lockable and articulatable joint positioned to connect a pair of adjacent links in the plurality of links. In addition, the at least one lockable and articulatable joint is adapted and configured to increase the number of frictional surfaces available between the pair of adjacent links. There are also provided methods for controlling a segmented instrument. Exemplary steps of the method include introducing a segmented instrument into a patient where the segmented instrument has a plurality of links wherein adjacent links are joined by a hinge. Next, there is the step of manipulating the links about the hinges to maneuver the segmented instrument to provide access to a surgical site within the patient. In one aspect, the manipulating step produces a sliding motion between a plurality of complementary shaped components within a portion of a brake assembly between adjacent links. Next there is the step of actuating the brake assembly to substantially prevent movement about the hinge of the links attached to the braking mechanism.

The invention discloses a surface acoustic wave device performance analysis method based on a hybrid algorithm. The surface acoustic wave device performance analysis method comprises the following steps: 1) coupling a temperature field into a piezoelectric physical field in the forms of thermal stress and thermal strain; 2) solving a mathematical model through a finite element FEM technology to obtain a finite element model of the coupling temperature field quantity; 3) through a finite element model order reduction technology based on graphic accelerator acceleration and a periodic boundary condition, eliminating a degree of freedom which does not need attention in the finite element model; 4) obtaining performance parameters of the multi-physical field coupling surface acoustic wave device by using a biological intelligent optimization algorithm; and 5) taking the performance parameter solved by the biological intelligent optimization algorithm as an initial solution, and obtaining an accurate solution of the performance parameters of the surface acoustic wave device by using a one-dimensional search algorithm. According to the scheme, the error between the performance of a designed surface acoustic wave device and an actual product can be effectively reduced, and meanwhile, the time consumed in the calculation process and the occupied computer memory resources are greatly reduced.