61results about How to "Small coupling between dimensions" patented technology

In a multi-mode interference waveguide (MMI) of a sheet shape spreading in the length direction and the width direction, the length of the multi-mode interference waveguide is set to such a length that the unique mode interferes in the length direction, thereby reducing the coupling loss when inputting / outputting the signal light. The multi-mode interference waveguide has a maximum refraction factor portion in the thickness direction and has such a refraction factor distribution that the refraction factor is reduced as departing from the maximum refraction factor portion. Thus, it is possible to suppress mode dispersion in the thickness direction of the multi-mode interference waveguide and obtain a high transmission rate in the order of 10 Gb / s.

An optical fiber coupling part capable of reducing coupling loss while maintaining a large operating distance, and having a good module assembling property. AT least one GRIN lens having numerical aperture NA that is larger than numerical aperture NAs of a light-emitting source (such as a semiconductor laser) is fusion-spliced with one end of the optical fiber. All lights emitted from the light-emitting source can enter the GRIN lens, and the loss of the light can thereby be reduced. In addition, a second GRIN lens having numerical aperture NA2 is fusion-spliced with one end of the optical fiber having numerical aperture NAf, and further a first GRIN lens having numerical aperture NA1, which is larger than numerical aperture NA2, is fusion-spliced with the other end of the second GRIN lens. Thereby, the light emitted from the light-emitting source can efficiently enter the optical fiber, and loss of the light can thereby be reduced. In this case, the formula expressed by NAf≦NA2<NAs≦NA1 is desirable.

The invention relates to an elastomer for a six-dimensional force sensor, and provides a cross-shaped beam type elastomer for the six-dimensional force sensor to solve the problems of low sensibility and large coupling among dimensions of the existing elastomer for the six-dimensional force sensor. Four inner beams and four overload protection beams are uniformly distributed and staggered along an outer wall of an inner ring, four outer beams are arranged on the outer sides of the four inner beams, the four outer beams and the four inner beams are in one-to-one correspondence, the outer beams are fixedly connected with the corresponding inner beams, an outer ring is correspondingly arranged on the outer side of each overload protection beam, one outer beam is arranged between every two adjacent outer rings, and each of the two ends of the outer beam is fixedly connected with one outer ring through a connecting plate, two outer ring through holes are formed in the upper end surface and the lower end surface of each outer ring, eight inner ring through holes are uniformly distributed in the upper end surface and the lower end surface of the inner ring along the same circumference, each inner ring through hole is located between the adjacent outer ring and the outer beam, and an overload protection beam through hole and an outer ring process through hole are communicated with an inner ring process through hole. The cross-shaped beam type elastomer for the six-dimensional force sensor is suitable for industrial automation, automobiles, shipbuilding, military projects or robots.

This invention relates to a kind of 6-dimensional parallel connection structure RSS force transducer, character is: energizing platform ( 1) and fixed platform ( 4) join by three group uniformly distributed branched chain; each group branched chain composed by Left Side branched chain (2) and right side branched chain (3); branched chain submit circle symmetry disposal on fixed platform (4); each branched chain has two elasticity sphere deputy (2-2) and a elasticity turning deputy(2-5); on turning deputy perch (2-4) has elasticity turning deputy (2-5) that cross section is rectangular, and its surface stuck strain gauge (2-6). If energizing platform(1) has force or force moment acting, six elasticity turning deputy will generate corresponding strain, through circumscribed four limb differential bridge to gain corresponding six output signal.

A surface optical apparatus that includes a surface optical device with p-side and n-side electrodes, such as a surface emitting laser, a first substrate for supporting the surface optical device directly or through an elastic supporter formed of one or plural layers, and a first electrode wiring of at least a wire formed on the first substrate and electrically connected to one of the electrodes. A current is injected into or a voltage is applied across the surface optical device through the first electrode wiring and the p-side and n-side electrodes. A photodetector for detecting light from the surface optical device may also be arranged in the vicinity of the optical device.

The invention discloses a double cross beam type six-dimensional force and torque sensor based on low-dimensional coupling. The sensor comprises an outer circular ring wall, an inner circular ring wall, outer-ring stress beams, inner-ring stress beams and a center loading shaft. On the basis of the strain principle of the interior of an elastomer, the outer circular ring wall is fixed, so that force in the x direction, force in the y direction, force in the z direction, torque in the x direction, torque in the y direction and torque in the z direction are measured in a three-dimensional space. Four sets of strain pieces are pasted on the inner-ring stress beams and sense the force in the x direction, the force in the y direction, the force in the z direction and the torque in the z direction respectively in the three-dimensional space. Two sets of strain pieces are pasted on the outer-ring stress beams and sense the torque in the x direction and the torque in the y direction respectively in the three-dimensional space. The double cross beam type six-dimensional force and torque sensor has the outstanding advantages of structural decoupling and small dimensional coupling, thereby being applicable to various occasions and especially applicable to the field of engineering application, based on complex systems, such as intelligent robots.

An optical fiber coupling part capable of reducing coupling loss while maintaining a large operating distance, and having a good module assembling property. AT least one GRIN lens having numerical aperture NA that is larger than numerical aperture NAs of a light-emitting source (such as a semiconductor laser) is fusion-spliced with one end of the optical fiber. All lights emitted from the light-emitting source can enter the GRIN lens, and the loss of the light can thereby be reduced. In addition, a second GRIN lens having numerical aperture NA2 is fusion-spliced with one end of the optical fiber having numerical aperture NAf, and further a first GRIN lens having numerical aperture NA1, which is larger than numerical aperture NA2, is fusion-spliced with the other end of the second GRIN lens. Thereby, the light emitted from the light-emitting source can efficiently enter the optical fiber, and loss of the light can thereby be reduced. In this case, the formula expressed by NAf≦NA2<NAs≦NA1 is desirable.

The invention relates to a three-dimensional force sensor which comprises a sensor body, a groove is arranged in the middle of the top of the sensor body, a force measurement platform is arranged in the groove, four vertical through holes with same dimension are evenly distributed at the bottom of the groove; a vertical adjusting screw is arranged at the lower part of each vertical through hole in a matching manner, a vertical one-dimensional force sensor and a vertical steel ball are further arranged in a vertical thread hole, a bottom surface positioning blind hole is arranged at the bottomsurface of the force measurement platform corresponding to each vertical steel ball, and most part of each vertical steel ball is correspondingly arranged in the bottom surface positioning blind hole; more than four horizontal through holes are evenly distributed on the side wall of the groove; and a horizontal adjusting screw is arranged at the outer end of each horizontal through hole in a matching manner, a horizontal one-dimensional force sensor and a horizontal steel ball are further arranged in the horizontal through hole in sequence, a side positioning blind hole is arranged on the side surface of the force measurement platform corresponding to each horizontal steel ball, and most part of the horizontal steel ball is correspondingly positioned in the side positioning blind hole. The three-dimensional force sensor is combined by 12 common one-dimensional force sensors, so that the structure is simple, and the requirement on the manufacturing technology is low.

The invention relates to a multidimensional force / torque sensor, which comprises a hollow framework, a loading platform, a plurality of laminar first elastic beams, a plurality of laminar second elastic beams, a force transferring block and a strain gage group, wherein the loading platform is suspended in the framework, the two ends of each second elastic beam are connected with the framework, thesecond elastic beams and the corresponding first elastic beams are connected at a preset angle, the corresponding first elastic beam is divided into two mutual perpendicular parts in width directionby the force transferring block, two sides of the force transferring block are respectively connected the two parts of the first elastic beam correspondingly, and the distances of the force transferring block away from the center of the first elastic beams are different. The thickness of the first elastic beams is thinned, thus reducing the influence on other beams; the first elastic beams are divided into two parts through the force transferring block, so that the elastic deformation of the first elastic beams can be effectively generated on any one of the two parts, and the detection dimension can be increased while the multi-component coupling is reduced. The distances of the force transferring block away from the center of the first elastic beams are different, so that the pasting positions and quantity of strain gages can be increased, and the detection dimension can be increased.

A TAMR (Thermal Assisted Magnetic Recording) write head uses the energy of optical-laser generated plasmons in a magnetic core plasmon antenna to locally heat a magnetic recording medium and reduce its coercivity and magnetic anisotropy. To enable the TAMR head to operate most effectively, the maximum gradient and value of the magnetic recording field should be at a point of the magnetic medium that is as close as possible to the point being heated. In addition, the coupling between the optical mode and the plasmon mode should be efficient so that maximum energy is transmitted to the medium. The present invention achieves both these objects by surrounding the magnetic core of a plasmon antenna by a variable thickness plasmon generating layer, whose thinnest and shortest portion is at the ABS end of the TAMR head and whose thickest and longest portion efficiently couples to the optical mode of a waveguide to produce a plasmon.

A distribution of grain boundaries in a magnetic recording medium having a granular structure is reduced so that the magnetic recording medium with a high medium signal-to-noise ratio is provided. According to one embodiment, in an underlayer composed of grains each having a generally columnar structure and in a magnetic recording layer composed of magnetic crystal grains each having a generally columnar structure and grain boundaries, a grain size Dm of the magnetic recording layer and a grain size Du of each of the underlayer crystal grains are determined to satisfy a relationship represented by 0.8×Du≦Dm<Du and a standardized grain boundary distribution obtained by dividing the standardized deviation of the distribution of the grain boundaries by an average grain boundary width is adjusted to about 0.4 or less.

A DFB semiconductor laser device includes a diffraction grating extending parallel to a laser cavity. The diffraction grating has ununiform structure wherein some of the corrugation patterns of diffraction grating are omitted periodically, the diffraction grating has different duty ratio between the area near the front facet of the laser cavity and the area near the rear facet, or the length of the diffraction grating is smaller than the cavity length and the width of the diffraction grating reduces in the vicinity of the rear end of the diffraction grating down to zero at the rear end.

A 3D small-range force sensor belongs to the technical field of mechanical testing technology and sensor application technology. The integral structure of the 3D small-range force sensor consists of a ''reversed Y-shaped'' elastomer and a fixing pedestal; wherein, two external vertical beams (1), (2) are provided with Z-direction rectangle through holes (5),(6) near the fixing pedestal; a horizontal beam (3) is provided with Z-direction rectangle through holes (7),(8) near a central vertical beam (4); the outer sides of the two thin walls of the two through holes on the two external vertical beams are stuck with four strain foils; the outer sides of the two thin walls of the two through holes on the horizontal beam (3) are stuck with four strain foils; the outer sides of the thin walls at the two ends of the through holes on the central vertical beam(4) are provided with four strain foils. Three groups of Wheatstone Bridges are formed. The range of each dimension of the invention is between 0 to 5N and can be used for testing the contact force of the sole of a small animal when creeping.

In order to improve the torque per weight ratio in electrical machines for a lower price it is proposed to use a segmented stator design. The segmented stator design is based on general E shaped cores traditionally used for single-phased transformers and inductors, The E-cores has a coil around the centered leg and is assembled parallel to the rotor axis, which means it will function with the transverse flux principle. A radial flux principle can also be performed with the E-cores if the E-cores are divided into two U-sections with a full pitch winding in between them. A clear extra advantage with the E-cores is short flux paths meaning less steel has to be magnetised. For a low volume production standard E-cores can be used making the investment in production facilities smaller. The E-core machines using the transverse principle can have different pole-shapes such the normal force between the rotor and stator are significantly reduced. This makes unequal designs like a 3 stator- and 2 rotor-pole design practical possible.

A carrier that extends in three mutually orthogonal directions, X, Y and Z, when in use and which comprises a back surface defining a first XY-plane and a side surface defining an XZ-plane, whereby the carrier comprises an antenna pattern. The antenna pattern comprises a wider branch that is located on the back surface of the carrier, and a narrower branch that comprises a first section that extends substantially along the Z-direction of the side surface and a second section that extends substantially in the X-direction of the side surface.

A magnetoresistive spin-valve sensor is constructed to include a magnetic layer, a specular layer made of a metal oxide, a back layer made of Au, Cu, AuCu, AgCu, AuAgCu or an alloy thereof and interposed between the magnetic layer and the specular layer, and a metal layer disposed adjacent to the specular layer, opposite to the back layer, and made of a metal which improves GMR performance of the magnetoresistive spin-valve sensor.

The invention discloses a six-dimensional force sensor with an elastomer structure. The six-dimensional force sensor comprises a horizontal elastic beam, a center vertical elastic beam, a loading shaft and an outer ring fixing stand, wherein the horizontal elastic beam is of a cross-shaped structure, and comprises four equal-length branches; one end of the center vertical elastic beam is fixed to the central position of the cross-shaped structure of the horizontal elastic beam, and is perpendicular to the surface on which the cross-shaped structure is positioned; the loading shaft is installed at the other end of the center vertical elastic beam; the outer ring fixing stand is a circular ring-shaped component sleeving the horizontal elastic beam, tails ends of the four branches of the horizontal elastic beam are fixed to the inner side surface of the outer ring fixing stand, and the tails ends of the four branches of the horizontal elastic beam are of an S-shaped structure; and the horizontal elastic beam and / or the center vertical elastic beam are / is further adhered with a strain gauge. According to the six-dimensional force sensor, the tails ends of the four branches of the horizontal elastic beam are of the S-shaped structure, thus the horizontal elastic beam serves as a flexible link when being subjected to an acting force in the corresponding direction; and the design of the center vertical elastic beam reduces the inter-dimensional coupling, thereby simplifying a decoupling algorithm and improving the measurement precision.

The present invention provides a wavelength division multiplexing / demultiplexing optical transceiving assembly based on a diffraction grating, which is an uplink optical emitting unit and a downlink optical receiving unit that comprise a laser chip array, a light receiving detector array, a first fast axis collimating lens, a second fast axis collimating lens, a first slow axis collimating lens, a diffraction grating, a slow axis focusing lens, a second slow axis collimating lens, an optical isolator, a coupling output lens, a coupling input lens, a coupling outputting optical fiber and a coupling inputting optical fiber. The wavelength division multiplexing / demultiplexing optical transceiving assembly solves the technical problem of sharing a diffraction grating to realize a wavelength division multiplexing / demultiplexing function, achieves the beneficial effects of better diffraction grating filtering property, smaller light path coupling loss and insertion loss correlative with wavelength, larger independent optical element sizes, and simpler assembly process, and is more suitable for manufacturing a multi-channel wavelength division multiplexing / demultiplexing optical transceiving assembly.

The invention discloses a pulling and pressing both-way decoupling and parallel connecting three-dimensional force sensor. A loading plate is arranged on an outer frame and provided with three nuts with the center connecting lines forming a regular triangle. The lower ends of supporting studs meshed with the nuts are connected with a force measuring plate. Three horizontal adjusting bolts are arranged on the side face of the force measuring plate, wherein the included angle formed by the corresponding center lines of the horizontal adjusting bolts is 120 degrees. The bolt heads of the bolts are located outside the outer frame. The force measuring plate is further provided with three vertical adjusting bolts with the center connecting lines forming a regular triangle, and the lower ends of the vertical adjusting bolts are located on a bottom plate of the outer frame. Four force measuring branch chains are arranged between the force measuring plate and the outer frame, the structures of the three horizontal force measuring branch chains on the side face of the force measuring plate are the same, the center lines of the three horizontal force measuring branch chains on the side face of the force measuring plate are located on the same horizontal plane and intersect with one another at one point of the force measuring plate, the 120-degree included angle is formed by the corresponding center lines of the three horizontal force measuring branch chains and vertical force measuring branch chains are arranged below the force measuring plate, wherein the center lines of the vertical force measuring branch chains are perpendicular to the center lines of the three horizontal force measuring branch chains and pass through the intersections of the center lines of the three horizontal force measuring branch chains. The pulling and pressing both-way decoupling and parallel connecting three-dimensional force sensor is small in inter-dimensionality coupling, high in measuring precision, simple and compact in structure and convenient to assemble and adjust, and the both-way decoupling measurement on the three-dimensional pulling and pressing force can be achieved easily.

An optical fiber grating tracker includes a first stub, a second stub, an optical fiber grating, and a connection part. The connection part has a through hole. The first stub is inserted into one end of the through hole. The second stub is inserted into the other end of the through hole. An interval exists between the first stub and the second stub. The optical fiber grating is in the through hole and in the interval. A space in the through hole is filled with a waterproof material. The optical fiber grating tracker and the method for detecting an optical fiber line fault can detect an optical fiber fault from an optical fiber truck to the optical fiber grating tracker through an optical splitter, and meanwhile do not affect normal communication of an original optical communication network.

A large-span space rope traction parallel six-dimensional force platform comprises fixed struts, a force plate and more than eight rope force measuring branched chains. The fixed struts are fixed to the ground through bolts, the force plate and the fixed struts are connected through the multiple rope force measuring branched chains, the upper portion and the lower portion of each fixed strut are respectively provided with a lifting lug, the upper surface and the lower surface of the force plate are respectively provided with lifting lugs of which the number is the same as the number of the fixed struts, each rope force measuring branched chain is composed of a tension sensor, two sections of ropes and drag hooks, the tension sensor arranged in the middle of each branched chain is connected with the two sections of ropes through threads, the two ends of the two sections of ropes, namely the two ends of each rope force measuring branched chain are respectively provided with one drag hook, and the drag hooks at the two ends of the rope force measuring branched chains are connected with the lifting lugs on the upper surface and the lower surface of the force plate and the lifting lugs on the fixed struts respectively. The large-span space rope traction parallel six-dimensional force platform is simple in structure, large-span space six-dimensional force measurement is achieved through a rope traction parallel mechanism, coupling between dimensions is small, and the force platform is especially suitable for large structural body space large-tonnage six-dimensional force measurement.

An optical device wherein an optical waveguide is formed on a dielectric substrate, the optical device includes an input part and an output part where the optical waveguide and corresponding optical fibers are connected. A stress layer is provided for at least one of the input part and the output part. The stress layer applies a stress to the optical waveguide so that an index of refraction of the optical waveguide is reduced.

The antenna sharing device has a first elastic-wave filter for passing signals of a first frequency passband and a second elastic-wave filter for passing signals of a second frequency passband higher than the first frequency passband. The first elastic-wave filter is a ladder-type filter including a first series resonator and a second series resonator having an antiresonant frequency point higher than that of the first series resonator. The first series resonator has a first IDT electrode and a first dielectric film covering the electrode. The second series resonator has a second IDT electrode and a second dielectric film covering the electrode. The first and the second dielectric films have a first projection and a second projection, respectively, so as to be formed above the electrode fingers of each IDT electrode. The cross-sectional area of the first projection of the first series resonator is larger than that of the second projection of the second series resonator in the excitation direction of the elastic wave. The structure satisfies both of steepness in a crossband and low loss in a passband.