49 results about "Parallel fiber" patented technology

A group of multiple hollow fibers may be shaped to introduce angular divergence among the fibers, or to introduce a selected longitudinal oscillation into the fibers. In one shaping technique, the fibers are held in parallel while upper and lower crimping assemblies of parallel crimping bars are drawn together on opposite sides of the parallel fibers. When bars of the opposing assemblies draw sufficiently close, they sandwich the fibers in between them, causing each fiber to assume a shape that oscillates as the fiber repeatedly goes over and then under successive bars. Since the crimping bars are aligned at oblique angles to the fibers, the peaks and troughs of successive fibers are offset. While in this position, the fibers are heated and then cooled to permanently retain their shapes. A different shaping technique utilizes a lattice of crisscrossing tines defining multiple apertures. In this technique, the lattice and fibers are positioned so that each fiber passes through one of the apertures. Then, the lattice and / or the fibers are slid apart or together until the lattice holds the fibers in a desired configuration, where the fibers have a prescribed outward divergence relative to each other. While in this position, the fibers are heated and then cooled to permanently retain this angular divergence.

A fiber pad having a core non-woven layer is disclosed. The core layer can have an upper surface and a lower surface. The core layer can comprise at least one fiber layer. The at least one fiber layer can comprise a plurality of parallel fibers. Selected groups of the parallel fibers can be folded into desired pleated configurations. Optionally, the core layer can comprise post-consumer carpet materials.

An optical circuit comprises: (a) a body having an x and y axis and two sides substantially parallel to the y-axis and separated along the x-axis; (b) a plurality of first ports along one of the two sides, each first port comprising a number of substantially paralleled fibers; and (c) a plurality of second ports along the other of the two sides, each second port comprising a number of substantially parallel fibers. The ports are interconnected with the fibers such that (i) the fibers of a given second port comprise a fiber from each of the first ports, and (ii) the fibers interconnecting the first and second ports are arranged asymmetrically about at least one of the x or y axes.

A method and system for multiplexing a network of parallel fiber Bragg grating (FBG) sensor-fibers to a single acquisition channel of a closed Michelson interferometer system via a fiber splitter by distinguishing each branch of fiber sensors in the spatial domain. On each branch of the splitter, the fibers have a specific pre-determined length, effectively separating each branch of fiber sensors spatially. In the spatial domain the fiber branches are seen as part of one acquisition channel on the interrogation system. However, the FBG-reference arm beat frequency information for each fiber is retained. Since the beat frequency is generated between the reference arm, the effective fiber length of each successive branch includes the entire length of the preceding branch. The multiple branches are seen as one fiber having three segments where the segments can be resolved. This greatly simplifies optical, electronic and computational complexity, and is especially suited for use in multiplexed or branched OFS networks for SHM of large and / or distributed structures which need a lot of measurement points.

Systems and methods for optical communication that may be employed to couple together fiber optic arrays of two or more optical communication modules using parallel fiber optic connectors and physically distinct and signal-independent optical communication paths. The disclosed systems and methods may be employed to provide separate signal-independent communication paths having signal transport characteristics that meet standards required for single fiber single point-to-single point applications.

A composite structural reinforcing strip is affixed to a structure to be reinforced (such as a bridge span, foundation pillar, or similar structure) by the use of several fasteners which extend through the strip and into the structure. The reinforcing strip preferably includes elongated continuous parallel fibers which have lengths extending along the length of the strip, and nondirectional fibers distributed transversely across the strip, with a polymer matrix affixing the parallel and nondirectional fibers. The strip may be placed on the structure to be reinforced, and may be attached thereon by actuating a common powder-actuated fastener gun to send fasteners through the strip and into the structure.

A method for obtaining information about a subsurface formation from acoustic signals that contain information about the subsurface formation, comprises a) transmitting an optical signal into a fiber optic cable (14) that includes a sensing apparatus (20) comprising a plurality of substantially parallel fiber lengths (24), b) collecting from the sensing apparatus a plurality of received optical signals, each received signal comprising a portion of the transmitted signal that has been reflected from a different segment of a cable length, wherein the different segments are each in different cable lengths and correspond to a single selected location along the sensing cable, and c) processing the collected signals so as to obtain information about an acoustic signal received at the different segments. The cable may be ribbon cable and the lateral distance between the different segments may be less than 10 meters.

The invention discloses a nerve repair conduit and a preparation method thereof. The nerve repair conduit consists of an inner layer conduit and an outer layer fiber wall, wherein the inner layer conduit consists of silk fibroin fibers arranged in the extending direction of the conduit, the outer layer fiber wall consists of the silk fibroin fibers encircling the conduit vertically and arranged axially, and the diameters of the silk fibroin fibers are between 50 and 3,000 nanometers; and the method for preparing the nerve repair conduit comprises the following steps: (1) preparing a regenerative silk fibroin film; (2) dissolving a pure regenerative silk fibroin film and preparing the silk fibroin fibers by using electrostatic spinning; and (3) collecting the silk fibroin fibers by using a roller device to obtain the nerve repair conduit. The nerve repair conduit is made from high-purity silk fibroin and is biodegradable, and the inner layer is made from parallel fibers arranged in the extending direction of the conduit and can conduct nerve cell migration; and the outer layer fibers are arranged by encircling the conduit axially and can support the conduit to prevent collapse.

The invention relates to a conductive parallel fiber membrane which is capable of promoting rapid repair of peripheral nervous tissues and is connected to an extracellular matrix, wherein the thin film (the fiber membrane) can serve as a biofunctional nerve scaffold. The conductive parallel fiber membrane which is connected to the extracellular matrix and is of a core-shell structure is prepared by virtue of a three-step method, namely preparing parallel fibers through electrostatic spinning, covering conductive polypyrrole through electrochemical oxidation, and conducting human skin fibroblast culture and splitting cells by virtue of a triton x-100 / ammonia water mixed solution. According to the invention, the composite fiber membrane, by virtue of the parallel structure, can guide the growth of nerve fibers in a directional mode, by virtue of the extracellular matrix, adhesion of the nerve cells and axon thereof is improved, and by virtue of the conductive polymer (the conductive polypyrrole), the growth of the nerve axon is promoted through electric stimulation; and with a synergistic effect among the three means, the regeneration and repair of nerves are promoted. A preparation device adopted by the invention is simple and easy, simple to operate, wide in material source and low in cost; and the prepared nerve scaffold is good in biocompatibility and functionality, and the nerve scaffold is expected to be applied to clinical field in the future.

A method for obtaining information about a subsurface formation from acoustic signals that contain information about the subsurface formation, comprises a) transmitting an optical signal into a fiber optic cable (14) that includes a sensing apparatus (20) comprising a plurality of substantially parallel fiber lengths (24), b) collecting from the sensing apparatus a plurality of received optical signals, each received signal comprising a portion of the transmitted signal that has been reflected from a different segment of a cable length, wherein the different segments are each in different cable lengths and correspond to a single selected location along the sensing cable, and c) processing the collected signals so as to obtain information about an acoustic signal received at the different segments. The cable may be ribbon cable and the lateral distance between the different segments may be less than 10 meters.

A fiber ribbon includes a plurality of first segments of optical fibers that extend in a planar side-by-side arrangement having a first predetermined pitch. A fiber-fan-out including a plurality of second segments of the optical fibers extends in a diverging arrangement from the fiber ribbon. A fiber holder extends across the plurality of second segments of the optical fibers for maintaining a plurality of terminal portions of the second segments in a second predetermined pitch that is greater than the first predetermined pitch so that the terminal portions can each be optically coupled to a corresponding optical subassembly (OSA) of a plurality of OSAs arranged in a linear array. An alternate embodiment uses a second fiber holder in place of the fiber ribbon. The holders can be replaced with a common housing assembly spanning all but the terminal portions of the optical fibers.

A composite structural reinforcing strip is affixed to a structure to be reinforced (such as a bridge span, foundation pillar, or similar structure) by the use of several fasteners which extend through the strip and into the structure. The reinforcing strip preferably includes elongated continuous parallel fibers which have lengths extending along the length of the strip, and nondirectional fibers distributed transversely across the strip, with a polymer matrix affixing the parallel and nondirectional fibers. The strip may be placed on the structure to be reinforced, and may be attached thereon by actuating a common powder-actuated fastener gun to send fasteners through the strip and into the structure.

Multiple, single fiber webs, consisting of parallel fiber bundles and non-wovens connected by an adhesive thread grid, positioned on a common shaft for simultaneous unwinding. The single webs are dispensed under tension from a primary unwinding drum while, in the same process, an additional adhesive thread grid of non-woven or fiber mat is dispensed and, using tension winding, combined with the single webs into a homogeneous laminate.

An additional fiber reinforced layer reduces crack propagation in a lightweight structure of an outer skin adhesively bonded to a reinforcing frame. For this purpose the additional fiber reinforced layer is interposed between the outer skin and the frame and adhesively bonded to the outer skin and to the frame. The additional layer has reinforcing fibers extending in parallel to each other or the reinforcing fibers are woven into a fabric embedded in a synthetic adhesive bonding material. The embedding of the parallel fibers or of the fiber fabric in the bonding material is performed either prior to the bonding or during the bonding of the additional layer to the outer skin and to the reinforcing frame.

The invention provides a parallel fiber array and a photoelectron chip coupling component. The coupling component includes a printed circuit board (6), a photoelectron chip (8), a fiber array module (5) and a base (7), wherein the photoelectron chip (8) is arranged on the printed circuit board (6), head ends of the fiber array module (5) is aligned with each pixel of the photoelectron chip (8), the fiber array module (5) is arranged on the base (7), and the base (7) is fixed with the printed circuit board (6). The parallel fiber array and a photoelectron chip coupling component has the advantages of simple structure, good coupling performance and high reliability.

The invention discloses a core-shell structure compound fiber, a preparing method thereof and application of the compound fiber to a polymer base flexible compound thin film. The core-shell structurecompound fiber is composed of a core and a shell which are coaxial. The core is a ferrite fiber with the strong magnetism. The shell is a ceramic fiber with the high dielectric constant. The polymer base flexible compound thin film is prepared from the core-shell structure compound fiber as the filler and polymer base body material, and nanometer fibers in the compound thin film are arrayed in parallel (perpendicular to the surface of the thin film) in the direction away from the thin film; by means of the parallel fibers in the outward direction, the compound thin film can have the high dielectric strength and energy storage density under the low field intensity. Thus, due to the novel compound fiber structure and the presented excellent dielectric performance, the prepared polymer compound thin film is expected to be widely applied on the aspects of embedded capacitors, pulsed power supply technologies and other energy storage devices.

The invention discloses a high-capacity parallel fiber bragg grating sensing analyzer. The sensing analyzer comprises a wavelength standard tool, an optical branching box module and an adaptive multi-channel parallel photoelectric conversion module. The optical branching box module is provided with an output port which is used for connecting the wavelength standard tool, a first bidirectional port, a second bidirectional port, ..., and an nth bidirectional port which are parallel to one another and used for connecting a fiber bragg grating sensor, and a first output port, a second output port, ..., and an nth output port which are used for connecting the adaptive multi-channel parallel photoelectric conversion module. The adaptive multi-channel parallel photoelectric conversion module is provided with n+1 optical signal input ports and n+1 electric signal output ports. An output port of the optical branching box module is connected with the input end of the wavelength standard tool. The output end of the wavelength standard tool, and the first output port, the second output port, ..., and the nth output port of the optical branching box module are respectively connected with the n+1 optical signal input ports of the adaptive multi-channel parallel photoelectric conversion module correspondingly one by one.

A radiation detector having a fiber optic wedge with a plurality of parallel optical fibers is provided for yielding a more cost-effective radiation detector by reading out more scintillator elements or crystals per photodetector surface area. The fiber optic wedge provides a cost efficient method for increasing the number of scintillators that may be read out by a single position-sensitive photodetector of the radiation detector, such as a PET camera.

The invention discloses an in-plane quasi-isotropic structure-stealthy composite material and further comprises a preparation method of the in-plane quasi-isotropic structure-stealthy composite material. The in-plane quasi-isotropic structure-stealthy composite material comprises a base body and a reinforcement body which are composited and solidified through a VARTM process. The base body is madeof resin; the reinforcement body is made of sandwich-type three-dimensional stereo woven material, the woven material is composed of a plurality of mutually-parallel fiber layers and normal fibers perpendicular to the fiber layers, and the fiber layers are bound together by the normal fibers through a weaving method. The preparation method specifically comprises the following steps of 1, weavingof the reinforcement body; 2, reinforcement body moulding; 3, glue injecting and solidifying; and 4, demoulding. The problems that as for a stealthy composite material in the prior art, the electromagnetic property is isotropic, the anti-impact property is poor, and the stealthy composite material is likely to be layered after being impacted are solved.

The invention discloses a bicolor bamboo joint composite yarn and a production method thereof. The bicolor bamboo joint composite yarn is produced by adopting a four-roller spinning frame; after horn mouths and roller notch grooves are additionally arranged, three strands of rough yarns can be simultaneously input and bamboo joint fiber bundles are subjected to independent immersing treatment and tensile failure treatment; after the bamboo joint fiber bundles are subjected to immersing treatment, the bamboo joint fiber bundles are tensioned off to form bamboo joint sections due to the fact that the roller movement is intermittent; and small sections are clamped and twisted between parallel fiber bundles of two strands of normal spinning, are in special fiber distribution and form the bamboo joint composite yarn with clear bamboo joint sections. The bicolor bamboo joint composite yarn has the advantages of multiple yarns; bamboo joints at two end heads of the tensioned bamboo joint sections are in special clear distribution and are different from raw materials of the parallel fiber bundles in difference and dyeing rate, so that the bamboo joints and the raw materials of the parallel fiber bundles have different special effects after being dyed; and the bicolor bamboo joint composite yarn is novel and varied in appearance and broad in market prospect and realizes the change of colors and the change of functions.

The invention relates to a spinning assembly for producing three-component parallel fibers. 7 flow guiding slots communicated with a third distribution plate are arranged at one face of a composite board to introduce fused materials, meanwhile 4 flow guiding slots are arranged at the positions, corresponding to the first, third, fifth and seventh flow guiding slots of the 7 flow guiding slots, at the other side of the composite board; radial communicated slots are arranged on drainage holes among the 4 flow guiding slots to composite three fused materials, and a spinneret plate with spinneret holes corresponding to the drainage holes among the 4 flow guiding slots is designed. Different types of three-component composite fibers can be produced by changing the variety of the fused materials or adding color master batches with different colors, the fibers can be applied to medical and anti-fake fibers and the three-component composite anti-fake fibers are obviously improved in anti-fake effect compared with single-component and dual-component composite fibers.

A fiber ribbon includes a plurality of first segments of optical fibers that extend in a planar side-by-side arrangement having a first predetermined pitch. A fiber-fan-out including a plurality of second segments of the optical fibers extends in a diverging arrangement from the fiber ribbon. A fiber holder extends across the plurality of second segments of the optical fibers for maintaining a plurality of terminal portions of the second segments in a second predetermined pitch that is greater than the first predetermined pitch so that the terminal portions can each be optically coupled to a corresponding optical subassembly (OSA) of a plurality of OSAs arranged in a linear array. An alternate embodiment uses a second fiber holder in place of the fiber ribbon. The holders can be replaced with a common housing assembly spanning all but the terminal portions of the optical fibers.

The invention belongs to the technical field of fibers, and provides a multi-core fiber demultiplexer and a manufacturing method thereof. The multi-core fiber demultiplexer includes at least two multi-mode fibers formed by tapering fusion. The non-fused end of each multi-mode fiber is welded to a single-mode fiber through tapering. Single-mode outputs are achieved, the insertion loss is low, and the multi-core fiber demultiplexer is simple in manufacturing method, functions reliably and is low in cost. When the multi-core fiber demultiplexer is a dual-core fiber demultiplexer, the light energy of two parallel fiber cores in a dual-core fiber is output with low loss and also in an optical coupling manner, thus greatly widening applications of the dual-core fiber in the field of sensing and communication. Meanwhile, two large semicircular fiber cores approaching to each other in distance are arranged on the transverse plane of the dual-core fiber demultiplexer, so the dual-core fiber demultiplexer is suitable for both a coupling type dual-core fiber with a small core distance and a non-coupling type dual-core fiber with a big core distance.

The invention discloses a method for identifying an interference source of a vibration source movement. The method comprises the following steps: receiving an alarm vibration signal, wherein the alarmvibration signal comprises a plurality of continuous vibration signals with amplitudes greater than ''0''; generating a two-dimensional array according to acquired alarm vibration signals; continuously acquiring a plurality of amplitude time centers in a plurality of continuous time interval sections with amplitudes greater than ''0'' to form an amplitude time center moving transformation track;acquiring a vibration source movement speed according to the acquired amplitude time center moving transformation track and a corresponding amplitude time center space position change curve; and performing judgement, when the vibration source movement speed is greater than a set vibration source movement speed threshold, the alarm signal is determined as a movement interference signal, otherwise the alarm signal is not a movement interference signal. According to the method for identifying the interference source of the vibration source movement, the identification speed is high, the calculation amount in a system fitting is reduced, and the identification efficiency is improved; and the identification effect is remarkable, vehicle interferences of parallel fiber movement can be accuratelyidentified, so that the false alarm rate of the system is reduced, and the effective alarm quantity of the system is improved.

Multiple, single fiber webs, consisting of parallel fiber bundles and non-wovens connected by an adhesive thread grid, positioned on a common shaft for simultaneous unwinding. The single webs are dispensed under tension from a primary unwinding drum while, in the same process, an additional adhesive thread grid of non-woven or fiber mat is dispensed and, using tension winding, combined with the single webs into a homogeneous laminate.

The invention relates to ceramic fibers, in particular to a ceramic fiber resistivity testing method. Multiple ceramic fibers are parallelly bonded to a metal plate sample table through double-sided adhesive tapes; the fibers are parallelly connected through silver conductive adhesive; after the silver conductive adhesive solidifies, a fiber sample and the metal plate sample table are put in a metal electromagnetic shielding box; the metal plate sample table, an electrometer for testing circuit current and a digital source meter providing test voltage are connected in series; under the constant-temperature constant-humidity condition, a micro current test is performed; after one current value is measured, voltage output of the digital source meter is closed; the metal electromagnetic shielding box is opened, one fiber is torn off, and corresponding micro current of the remaining parallel fibers is continually measured until that the current of the different fibers is all tested; resistivity values of the multiple groups of fibers different in quantity are solved according to the ohm law and a volume resistivity formula, and a statistical average is acquired. The problem that high resistance of the fine-diameter ceramic fibers cannot be accurately measured can be effectively solved.

A number of nonlinear optical fibers are configured in a parallel configuration. The fibers are pumped with optical pumps having a wavelength slightly longer than the zero dispersion wavelength for each fiber. By a demultiplexer optical signals within a certain wavelength interval are admitted to enter and exit the different fibers, in which parametric amplification can be achieved. By selecting the pump wavelength outside each corresponding interval crosstalk will be suppressed. The nonlinear fibers can be pumped by separate laser pumps, or two or more of the nonlinear fibers can be pumped by a common pump, depending on the different fiber properties. By tailoring fiber properties such as the zero dispersion wavelength, the second order dispersion coefficient and the fourth order dispersion coefficient, beneficial amplification characteristics can be achieved in different wavelength intervals.

A number of nonlinear optical fibers are configured in a parallel configuration. The fibers are pumped with optical pumps having a wavelength slightly longer than the zero dispersion wavelength for each fiber. By a demultiplexer, optical signals within a certain wavelength interval are admitted to enter and exit the different fibers, in which parametric amplification can be achieved. By selecting the pump wavelength outside each corresponding interval crosstalk will be suppressed. The nonlinear fibers can be pumped by separate laser pumps, or two or more of the nonlinear fibers can be pumped by a common pump, depending on the different fiber properties. By tailoring fiber properties such as the zero dispersion wavelength, the second order dispersion coefficient and the fourth order dispersion coefficient, beneficial amplification characteristics can be achieved in different wavelength intervals.

The invention provides a nanofiber capable of providing slow controlled release of medicines after pulse. The nanofiber comprises a main fiber bundle, wherein a parallel fiber bundle is arranged at the outer side of the main fiber bundle, the main fiber bundle and the parallel fiber bundle extend in the length direction, in the radial cross section, the parallel fiber bundle covers the periphery of the main fiber bundle by 40-70 %, and the main fiber bundle is composed of a medicine and a polymer pharmaceutic adjuvant insoluble in water; the parallel fiber bundle is composed of a medicine and a pharmaceutical adjuvant easily soluble in water. The invention further provides a preparation method of the nanofiber. The preparation method comprises the following steps: blending the medicine and the polymer pharmaceutical adjuvant insoluble in water into a consolute solution, and blending the medicine and the pharmaceutical adjuvant easily soluble in water into a consolute solution; controlling the rate of being injected into parallel spinning heads of the two solutions by adopting two injection pumps, and under the effect of high-voltage static electricity, by taking the outlets of the parallel spinning heads as a template, collecting the nanofiber by adopting a grounded fiber receiving flat plate; and preparing the nanofiber capable of providing slow controlled release of medicines after pulse.

The invention relates to a double-core cable for aviation. The double-core cable comprises two parallel fibers, wherein an outer surface of each fiber is coated with a polyimide coating layer, the polyimide coating layer is externally provided with a polyethersulfone jacket layer, two sides of the two fibers are provided with two aramid fiber enhancement cable reinforcement cores (KFRP), an outer sheath is arranged at periphery of the two fibers and the two aramid fiber enhancement cable reinforcement cores (KFRP), the polyimide coating layer is formed through coating polyimide at an outer surface of the fiber and curing the coated fiber through utilizing UV, a coating speed is 150-180 m / min, and wavelength of the UV is 365-395nm. The double-core cable is advantaged in that the polyimide coating layer is formed through coating polyimide at an outer surface of the fiber and curing the coated fiber through utilizing UV, the coating speed is fast, a coating outer diameter has good uniformity, creep performance and tensile performance of the cable are excellent, and the cable further has properties of high temperature resistance, hydrolysis resistance, acid and alkali resistance, nontoxicity, flame retardation and fuel oil resistance.