637 results about "Arm lengths" patented technology

The invention relates to an intelligent control system of an insulative aerial platform vehicle, an aerial platform vehicle with the intelligent control system and a control method thereof. The intelligent control system of the aerial platform vehicle comprises a wireless remote control device, an upper arm length sensor, an upper and lower arm angle encoder, a turntable rotating angle encoder, a leg grounding detection travel switch, a horizontal extending detection travel switch, a controller, a lower arm angle sensor, a lower arm length sensor, an arm bracket travel switch, a program download port, a liquid crystal screen, a quintuple proportional valve group, an oil circuit switching valve, a turntable operating switch, a leg action switch and a turntable potentiometer handle. A TTC200 controller is adopted as the controller of the aerial work platform, a wireless remote control handle is arranged at the insulative bucket part, the turntable is provided with the potentiometer handle to control the mechanism movement; the setting and the adjustment of various important parameters in the controller are completed through displaying the work condition of the vehicle body on the LCD display and debugging the software. The method has wide operational range, safety, reliability and high automatization through controlling the work condition of the entire vehicle by the controller.

A camera support assembly including an elongated support, such as a extensible support, which support extends between a base assembly and a handgrip, whereby a user of the camera may secure a camera to the base assembly and, while holding the handgrip, position the camera a distance away, which may be greater than arms length, to capture a still or moving image of the user, of an obstructed scene, or of hard to reach and / or unsafe areas.

A robot arm (50) of the present invention includes, as a direct acting extensible / retractable joint (J3), an arm section (2) constituted by an upper structure group (20) and a lower structure group (21). Groups (20) and (21), having an arrangement in which structures are connected in series, partially engage so as to form a direct rigid combined structure, and are separated so as to release the rigid structure. An arm length can be adjusted arbitrarily. Section (2) can have a plane surface having no gap to prevent entry of a finger / dust. Separation of Groups (20) and (21) allows an upper structure (22) and a lower structure (23) to rotate around their rotational axes, to realize compact storage inside a robot arm supporting member (1). It is thus possible to prevent significantly entry of a finger / dust, and provide a compact direct acting extensible and retractable arm mechanism.

A crank arm of a bicycle having an effective crank arm length that can be selectively adjusted for increasing the comfort and performance of the rider. The crank arm includes a crank arm member rotatably connected about a crank arm member rotational axis to a base member. The base member includes a spindle bore defining a spindle rotational axis, which is eccentric with respect to the crank arm member rotational axis. The opposite end of the crank arm member includes a pedal bore defining a pedal rotational axis. The crank arm further includes a fastener to selectively couple the base member to the crank arm member for rotation therewith.

The invention discloses a multifunctional H-type polyethylene glycol derivative and a preparation method thereof. The structure is as shown in formula (1) in the description, wherein a linear main axis LPEG and four PEG branched chains are included, and n1, n2, n3 and n4 are polymerization degrees of the branched chains, respectively; U1 and U2 are trivalent branching groups connecting the main axis LPEG with two PEG branched chains; F1 and F2 contain functional groups or their protected forms R01, and contain or do not contain branching groups G, and correspondingly, the number of R01 is one or more than one; F1 is the same as or different from F2; any linking group in the molecule or linking groups formed with adjacent heteroatom groups are stable or degradable; any PEG chain segment in the molecule independently shows polydispersity or monodispersity. The functionalized polyethylene glycol is diverse in branching structure and branching arm length, is adjustable and easily-controllable in various parameters and performance indexes, and is wide in application.

A camera support assembly including an elongated support, such as a extensible support, which support extends between a base assembly and a handgrip, whereby a user of the camera may secure a camera to the base assembly and, while holding the handgrip, position the camera a distance away, which may be greater than arms length, to capture a still or moving image of the user. The base assembly may be provided with a pair of legs so that the camera support assembly may also be used as a tripod.

The invention discloses a three-dimensional (3D) virtual projection and virtual touch user interface and an achieving method. The three dimensional virtual projection and virtual touch user interface comprises a depth detecting device, an eyes image optical parallax calculation module, an eyes image processing module, a 3D display device, a gesture identification module, a camera and a virtual touch controller. The depth detecting device detects to obtain distance information between the head and the hands of a user and the 3D display device, the eyes image optical parallax calculation module calculates eyes image optical parallax according to the distance information, the eyes image processing module processes an image according to information of the eyes image optical parallax and sends processed image to the three dimensional display device to be virtually projected in a scope of arm length of the user, the gesture identification module identifies user finger moving tracks through the depth detecting device and the camera, the virtual touch controller conducts corresponding reactions according to gestures and the moving tracks of the user. The 3D virtual projection and virtual touch user interface not only achieves the 3D virtual projection and virtual touch user interface with feedbacks, but also brings the user interactive experience which is convenient to use and novel.

In one embodiment of the invention, an apparatus is provided including a linkage and a balancing mechanism coupled to the linkage around a pivotal joint. The linkage couples to a support structure at a first end and support a weight applied to a second end. The balancing mechanism counter balances the weight applied to the second end of the linkage. As the linkage is deformed to vertically adjust the height of the weight with a different moment arm length, the balancing mechanism varies a cable path length to modify the compression of a spring and a tension in a cable to adjust the amount of counter balance force applied to the linkage.

The invention discloses a wide band single pulse flat plate slot array antenna which comprises four wide band low profile flat plate slot antenna sub-arrays and a single pulse waveguide comparator. Each wide band low profile flat plate slot antenna sub-array further comprises a wide band low profile flat plate slot antenna unit and a waveguide feed network, and each wide band low profile flat plate slot antenna unit further comprises a square radiating cavity, radiating slots, a stimulation waveguide cavity, a stimulation slot and a feed waveguide. Each waveguide feed network is formed by a plurality of equal-arm-length equal-power-division and equal-arm-length unequal-power-division waveguide H-T powder dividers in a cascading mode, the single pulse waveguide comparator is formed by three plane magic Ts and an equal-arm-length equal-power-division waveguide H-T power divider, output openings of the single pulse waveguide comparator are connected with the wide band low profile flat plate slot antenna sub-arrays, and a sum beam, an azimuth difference and a pitching difference beam are formed at three input ports. Compared with a traditional single pulse waveguide slot antenna, the wide band single pulse flat plate slot array antenna has the wider band and is higher in efficiency, easier to design and easier to manufacture.

A range of motion machine having two or four cranks driven directly by motors without exposed gears or chains. The speed and direction of crank rotation and the length of the crank arms may be varied with electronic controls. Crank arm length may be varied whether the crank is stationary or rotating. The cranks and motors are mounted at the top of pedestals which are adjustable in height.

The invention discloses a broadband THz metamaterial absorber based on multi-resonant absorption superposition, belongs to a THz absorber in the field of metamaterials and electromagnetic functional technology, and aimed at that the broadband THz metamaterial absorber includes an upper patterned functional material layer, an intermediate medium layer and a lower metal reflective layer; the upper patterned functional material layer is formed by arranging metamaterial unit structures, each metamaterial unit structure includes a circular ring structure in which four parallel openings and a cross arm are disposed, and four connecting arms of each cross arm are connected with four ARC segments of each circular ring structure; the lattice period of a metamaterial unit structure array is a 10um to 100um, each metamaterial unit structure has a line width of 0.5um to 10um, the arm length x of each connecting arm is 3um to 50um, and the width d of each parallel opening is 0.5um to 50um. The invention does not require complicated procedures, a difficult process and high production cost to achieve the purpose of terahertz absorption band spread.

A camera mounting assembly includes a base member or plate for holding a camera and a side member or plate. In an exemplary embodiment, lower slots on the base plate or side slots on the side plate are gripped by a vertical support's quick-release mechanism to mount the camera in a landscape or portrait orientation, respectively, the camera being generally centered and evenly balanced over the support in either case. The side member is detachably fastened to the base member, which modular construction permits separately timed purchase of the base member and side member as allowed by the user's budget and further permits breakdown of the assembly for ease of transport. The side member may be generally L-shaped with a lower arm length less than the side arm length, which also facilitates transport. Other components may be detachably added such as a hand grip facilitating freehand shooting with the camera.

The invention relates to a line patrol robot capable of climbing poles and towers. A structure of a double-arm line patrol robot is adopted, and two mechanical arms are arranged on the same side of the robot. Each mechanical arm has three degrees of freedom and is capable of moving up and down along the arm length direction, rotating in the direction of a vertical plane of the mechanical arms, rotating along a horizontal plane of a robot body and integrally moving along a rail on the robot body; the upper portion of each mechanical arm is provided with two half rollers capable of opening and closing along the corresponding mechanical arm. The line patrol robot is capable of climbing poles and towers to inspect faults of the poles and the towers and capable of conveniently getting on and off lines to complete power transmission line inspection tasks. Further, obstacle crossing ways of the robot on power transmission lines are simple, posture control of the robot is easy, and accordingly patrol efficiency can be improved, and autonomous intelligence of the robot can be improved.

The present invention relates to data arm mechanism for remote operation job of robot. The data arm mechanism is one mechanical arm with six rotating joints, and each of rotating joints is provided with one potentiometer as angle sensor. The data arm has gravitational compensation mechanism and may be worn by operator for leading motion or may be drawn to required state without being worn, and it may stop in any position without need of auxiliary outside force. The data arm has length regulating mechanism for person of different arm length to wear. The present invention can detect the rotation angles of total six freedoms of the shoulder joint, elbow joint and wrist joint of the operator, and is suitable for control platform of remote operated robot and for being worn onto arm of the operator.

The invention relates to a variable polarization panel antenna unit, which is formed by slot coupling a plurality of metal layers from top to bottom; the topmost metal layer from top to bottom is a radiation patch printed layer, and the surface of the printed layer is printed with a radiation patch; the second layer is an etched coupling slot; the third layer is a microstrip line feeder network layer which is provided with a strip line feeder network thereon; and the forth layer is a grounding plate, and the forth layer and the second and third layers form a strip line transmission line. The U-shaped slot provided by the invention uses a vertical part arm length as a moderating variable, and an impedance deploying range is expanded obviously; a double-port feed structure is adopted, when the antenna works in a circular polarization mode, the TM10 and TM01 degeneracy mode field distribution has very good symmetry, and the circular polarization orthogonal isolation is high; and a strip line feed network structure is adopted, thereby not only effectively reducing spurious radiation and back reflection, but not increasing the profile thickness of the panel antenna excessively.

A camera support assembly including an elongated support, such as a extensible support, which support extends between a base assembly and a handgrip, whereby a user of the camera may secure a camera to the base assembly and, while holding the handgrip, position the camera a distance away, which may be greater than arms length, to capture a still or moving image of the user. The base assembly may be provided with a pair of legs so that the camera support assembly may also be used as a tripod.

A tablet assembly for use in a space partially defined by a wall structure having a substantially planar wall surface, the assembly comprising a first coupler supported by the wall structure, a tablet support arm assembly having a support arm length dimension between proximal and distal ends, the proximal end mounted to the first coupler adjacent the planar wall surface for rotation about a first vertical axis through a first range of motion between first and second first-axis limit positions, the arm assembly extending from the planar wall surface to form acute angles with the planar wall surface in each of the first and second first-axis limit positions and a tablet member forming top and bottom surfaces and having a side edge, the tablet member supported at the distal end of the arm for rotation about a second vertical axis through a second range of motion between first and second second-axis limit positions, wherein the limit positions limit the tablet member to positions in which the side edge of the tablet member is constrained from contacting the planar wall surface.

The invention discloses a frequency drift compensation-based phase sensitive optical time domain reflectometer and a measuring method thereof. According to the system, a Mach-Zehnder interferometer (MZI) with fixed arm length difference is formed and a laser frequency drift detection module is formed by introducing time delay optical fiber and connecting optical fiber with specific optical path difference on the basis of the traditional phi-OTDR. The frequency drift of the layer is obtained according to the signal intensity of the MZI in the system and the phase position of a phi-OTDR sensingsystem is compensated through a phase compensation algorithm, so that the influence on the sensing property of the phi-OTDR by the frequency drift of the laser is eliminated. The influence on the sensing property by the frequency drift of the laser is eliminated by constructing a novel phi-OTDR system, the influence of noise can be reduced by processing methods such as phase compensation, and theaccuracy of quantitatively measuring a vibration event by the system is improved.

A pet leash which allows the user to remain connected to the pet such that the user can alternatively move between a hands-free connection and a hand-held connection. The hands-free connection can consist of an arm band fixture that can be connected to the user's arm and allows the pet owner to operate the leash hands free so that the user's hands are available for other tasks. The hand-held connection can consist of a grip handle that allows for a shorter hold on the leash and gives more control in situations in need of more restraint. The leash can be adjusted for different user arm lengths and for different dog heights. A pocket on the armband and a pouch on the grip handle can be provided for additional storage.

The invention discloses a multi-mode amplitude control system of a crank arm type overhead working truck. A platform weighing sensor is arranged on a work platform and detects the load capacity of the work platform, a first arm length and angle sensor and a second arm length and angle sensor detect the amplitude variation angles and telescopic length of a first telescopic arm and a second telescopic arm, and a double-shaft tilt angle sensor is arranged on a rotary table and detects the tile angle of a truck body. Supporting leg stress detecting devices are used for detecting whether supporting legs are stressed or not. A controller calculates the actual amplitude of the first arm and the second arm according to signals detected by the first arm length and angle sensor, the second arm length and angle sensor, the platform weighing sensor, the double-shaft tilt angle sensor and the supporting leg stress detecting devices, the actual amplitude is compared with an amplitude limiting mode, an amplitude control curve is output, the corresponding amplitude variation and telescopic motion of the first arm and the second arm is controlled, multi-mode amplitude control is achieved, and the control system is flexible and variable, and meets different work conditions.

A magnetic interface generator generates a magnetic interface at a center frequency f0. The magnetic interface generator is a passive array of spirals that are deposited on a substrate surface. The magnetic interface is generated in a plane at a distance Z above the surface of the substrate. The distance Z where the magnetic interface is created is determined by the cell size of the spiral array, where the cell size is based on the spiral arm length and the spacing S between the spirals. The center frequency of the magnetic interface is determined by the average track length DAV of the spirals in the spiral array. In embodiments, the spiral array is one sub-layer in a multi-layer substrate. The spacing S of the spiral array is chosen to project the magnetic interface to another layer in the multi-layer substrate so as to improve performance of a circuit in the plane of the magnetic interface. For example, the magnetic interface can be used to increase the inductance of a printed inductor circuit, and to increase the gain and match of a microstrip patch antenna. Furthermore, the magnetic interface reduces the traverse electric (TE) and transverse magnetic (TM) surface waves in the plane of the magnetic interface, which reduces unwanted coupling between transmission lines.

The invention discloses a multi-arm star-type polymer and a preparation method thereof. The method synthesizes the multi-arm star-type polymer by a method with the following two steps of step one: taking a complex formed by a polydentate nitrogen-contained compound and a transitional metal halide as a catalytic system so as to catalyze the polymerization of atom transfer free radicals and self-condensing vinyl of a monomer, thus preparing and obtaining the halogen atom-contained hyperbranched polystyrene macromolecular initiator taken as the star-type polymer core; and step two: taking the complex formed by the the polydentate nitrogen-contained compound and the transitional metal halide as the catalytic system and taking the prepared halogen atom-contained hyperbranched polystyrene macromolecular as the initiator to initiate the polymerization of the atom transfer free radicals of the monomer, thus preparing and obtaining the multi-arm star-type polymer with controllable core structure, core size, core property, arm number, arm length and arm property and adjustable molecular weight within wider range.

The invention relates to a crosslinking polylactic acid and a preparation method thereof. The preparation method comprises the following steps of: in the presence of a coinitiator, synthesizing starlike polylactic acid through ring-opening polymerization of lactide; modifying a terminal group by using unsaturated anhydride; initiating C=C double-bond free radical polymerization reaction by a proper method; and crosslinking and curing to obtain the product. The crosslinking polylactic acid and the preparation method thereof have the following advantages that: under the condition of the same molecular weight, the starlike polylactic acid has lower melting viscosity compared with that of linear molecules, so that a composite material is easy to process; crosslinking density of a curing product can be changed by adjusting the arm number and the arm length of the starlike polylactic acid; and various initiating methods can be selected, so that different requirements of a polylactic acid body and the composite material of the polylactic acid body during formation are met.

The invention relates to a general calibration system and method of phase shift sensitivity based on an optical phase demodulator. The calibration system is established based on an OPD4000 optical phase demodulator for the calibration of phase shift sensitivity of an interference type optical fiber hydrophone. The calibration system is consisted of four sub-systems, namely a control and management system, an underwater sound signal emitting system, an optical phase demodulating system and an electrical signal receiving system. The optical phase demodulating sub-system is formed based on the principle of outer modulation demodulating technology of phase generation carrier, and can demodulate the interference optical phase in real time and output the result using a simulation signal. The system has the following beneficial effects that the frequency response for phase shift sensitivity of phase interference type optical fiber hydrophone is acquired accurately in real time, and the output in two data forms of simulation and digit is provided. The system is suitable for the calibration of phase shift sensitivity of phase interference type optical fiber hydrophone of each type with different arm length differences, and has the characteristics of wide calibration frequency band, wide dynamic range, low measurement uncertainty and the like, and is simple in operation.

The invention relates to an arm-length-variable vertical shaft tide current water turbine generator set which belongs to the field of development of renewable energy sources. The generator set mainly comprises a blade, an arm seal, a telescopic arm, a piston, a fixed arm, a hydraulic cylinder for shortening, a hydraulic cylinder for extending, a support wheel disk, a compressing nut, a tide current speed and direction sensor, a main shaft, a main shaft bearing, a big gear, a support seat, a hydraulic oil station, a hydraulic pump for shortening, a hydraulic pump for extending, an electric brush, an integrated control system, a shaft neck seal, a small gear shaft bearing, a small gear shaft, a coupling and a generator. The telescopic arm is dynamically extended or shortened in the rotatingprocess of the blade according to the tide current direction and flow speed; and when the normal of the telescopic arm is parallel or perpendicular to the tide current direction, the telescopic arm is respectively changed to be the longest or shortest so that a vertical shaft tide current water turbine reaches highest energy capture efficiency. The self-start capability of the water turbine on low-speed tide current can be also improved by adjusting the telescopic arm. The arm-length-variable vertical shaft tide current water turbine generator set disclosed by the invention can be used for the comprehensive utilization and development of river water flow energy and ocean tide current energy.

A dimension measurement device comprises a waist length principle-axis tape, an arm length principle-axis tape, a shoulder width principle-axis tape, a plurality of sensing measurement tapes, a principle-axis tape positioning control module, a tape body-surface sensing module, a tape extension control module and a dimension measurement and processing module. The principle-axis tape positioning control module automatically positions the principle-axis tapes after a user wears the dimension measurement device. The tape body-surface sensing module senses body surface positions and adjusts the positions of the tapes. The tape extension control module controls the tapes to contract to the body surface of the user. The dimension measurement and processing module automatically measures and acquires dimension data of the body parts of the user. The invention further provides a method of acquiring body dimension data and displaying fittings. Through the dimension measurement device and the method, the user can obtain an actual fitting matching with the body dimension data to purchase easily the well-fitting clothing.