4930 results about "Cable line" patented technology

Systems and methods for providing broadband communication are provided. An optical fiber node may be coupled to a source component. The optical fiber node may receive, from the source component, a downstream light signal via at least one input optical fiber, and transmit the downstream light signal to a plurality of output optical fibers. A tap device may be coupled to the optical fiber node via at least on optical fiber. The tap device may receive the downstream light signal via the at least one output optical fiber, convert the downstream light signal into a radio frequency downstream signal, and transmit the radio frequency downstream signal to a plurality of cable lines. The plurality of cable lines may be coupled to one or more customer premises.

A disposable telemetry cable deployment system for facilitating information retrieval while drilling a well includes a cable spool adapted for insertion into a drill string and an unarmored fiber optic cable spooled onto the spool cable and having a downhole end and a stinger end. Connected to the cable spool is a rigid stinger which extends through a kelly of the drilling apparatus. A data transmission device for transmitting data to a data acquisition system is disposed either within or on the upper end of the rigid stinger.

The present invention is a distribution network cable-line mixed fault circuit selection method by using HHT detection technology. The invention uses HHT singularity detection technology to calibrate fault occurring time accurately, and implements circuit selection according to a principle that, when a fault occurs transient fault zero-sequence current component of the fault circuit and the regular circuit is opposite in direction. The specific method is using HHT to proceed EMD decomposition to the sampling signal of before and after 1/4 period each circuit fault zero-sequence current that is morphological filter pretreated, obtaining highest frequency IMF component of each circuit fault zero-sequence current and proceeding a first-order backward difference treatment to the IMF component, comparing the polar mutation of the fault zero-sequence current IMF component at fault moment, and then forming a circuit selection criterion. Analysis and simulation of the principle shows that, using fault information of 1/4 period after the fault to select circuit can provide an accurate and reliable circuit selection result and avoid effects of paraphrase and CT saturation on circuit selection accrracy.

A cable slack management system is used in conjunction with a conventional component rack to secure cables of excess length to minimize disturbance, interference, and general clutter that the excess cable length would otherwise cause. In one implementation, the cable slack management system includes a slack management panel that is attached to two opposing vertical members of a rack to extend horizontally between the members as a cross-member of the rack. If more than one cable slack management system is installed in a rack, typically the slack management panels are placed between component panels in some alternating fashion. In an alternative implementation, the slack management panels are vertically oriented, and are typically mounted adjacent to a rack. The cable slack management system also includes one or more cable spools for each slack management panel. The cable spools allow cable to be wrapped around them thereby securing the cable.

The invention relates to a self-adaptive method for fault line selection of a cable-wire mixed line of an electric distribution network by using full-band wavelet energy relative entropy. The method comprises the following steps: when the zero-sequence voltage instantaneous value of a bus is out of limit, starting a fault line selection device immediately; performing wavelet decomposition on zero-sequence current in 1/4 cycle after the fault of each line, performing single reconstruction on wavelet decomposition coefficients under each scale, and calculating the wavelet energy under each band of the zero-sequence current of each line by using reconstruction coefficients; and calculating the wavelet energy relative entropy under each band of each line and solving the comprehensive wavelet energy relative entropy of each line by combining the super-strong recognition capability of the relative entropy to slight differences between signals, and self-adaptively selecting out the fault line by comparing the size of the full band comprehensive wavelet energy relative entropy of each line. Theoretical analyses and a large number of emulations show that the method effectively avoids the influence caused by a CT saturation discontinuous angle on the line selection, and is applicable to the cable-wire mixed lines, pure cable lines and pure aerial lines.

Disclosed herein are a crosstalk canceling pattern for high-speed communications and a modular jack having the same, which includes a compensating capacitor on a transmission line to cancel crosstalk due to parasitic capacitance generated between neighboring insert pins, and includes a second compensating capacitor to correct phase mismatch due to parasitic inductance generated in insert pins and transmission lines, when a high-frequency signal is applied. The modular jack having the crosstalk canceling pattern for high-speed communications includes a housing, a printed circuit board, a lower contact block, and an upper contact block. The hosing includes a plug insert hole, an insert pin locking plate, and a coupling guide part. The printed circuit board is a multi-layered structure having a plurality of compensating capacitors. The lower contact block is mounted to the lower surface of the printed circuit board. The upper contact block is mounted to the upper portion of the lower contact block, and divides UTP cable wires to be connected to IDC terminals.

A method of demanding/supplying a necessary electric power through a self-adjusting process between two devices connected by a Universal Serial Bus (USB), removing the requirement of disconnecting and re-connecting cable lines in order to make a power demand again. A power supplying device first determines how much electric power is demanded by a demanding device, then sends the device a signal of impossible supply or the like if the demand can not be met. The supplying device also determines whether or not a new electric power demand can be supplied if the demanding device demands again, and the supplying device then supplies power to the demanding device if the demand can be met. A power demanding device demands an electric power from a supplying device connected through the USB. The connected power demanding device first reduces the demand if a signal of impossible supply or the like is received from the supplying device, then demands the reduced amount from the supplying device.

The invention discloses a new method for performing fault line selection by using the characteristic of a non-power frequency transient state fault component for extracting single-phase fault zero-sequence current by using Hilbert-Huang transform (HHT). The method comprises the following steps: performing EMD decomposition on fault zero-sequence current of each feeder line by using the HHT to acquire an IMF component of the zero-sequence current of each feeder line; constructing a resolving signal according to Hilbert transform, solving instantaneous amplitude and frequency of the zero-sequence current of each feeder line, and eliminating a power frequency component in the instantaneous frequency of the zero-sequence current of each feeder line to acquire a non-power frequency fault component; and forming a line selection criterion according to the characteristics that the amplitude of the non-power frequency fault component of the fault line is greater than that of the non-fault line and the polarity of the fault line is opposite to that of the non-fault line. The line selection method is not affected by an arc suppression coil, and is applicable to non-grounded, arc suppression coil grounded and high-resistor grounded systems, overhead lines or cable lines and cable overhead mixed lines; and the line selection result shows that the method applied to low-current single-phase grounding fault line selection is accurate and reliable.

A track lighting system which supports compact fluorescent lamp fixtures removably attached to a track member by a track adaptor. Compact fluorescent lamp fixture depends from a track adaptor by an adjustable suspended cable. Suspended cable provides electricity and mechanical support to a compact fluorescent socket and lamp. The track adaptor may also accommodate line voltage fixtures and allows a user to adjust the suspended cable by cutting the cable, stripping internal cable wires, then inserting internal wires into the track adaptor cavities and securing with securing screws.

A modular submersible video viewing system. The system includes a viewing monitor, multi-conductor cable and camera that store at a portable housing and deploy for underwater viewing. The camera can be submersed for stationary viewing, towed from a watercraft or manipulated with an operator pole. The camera can be secured with clips or bottom support plates in various orientations or be secured to a swivel coupler and steering guide and/or pole. A rudder, ballast weight (with or without a keel), lens' sunshield, lights and/or lenses and filters are optionally mountable to the camera. In one portable assembly, a cable spool mounts to a carry case that stores the system components. In another portable assembly, the viewing monitor, battery and attendant control circuitry are mounted in a monitor housing having an integral sunshield. A handle and a pair of cable wrap arms contain the cable. A recess at the monitor housing supports the camera. The housing can be supported on the floor or from a wall bracket to permit viewing through the sunshield. In another portable assembly, the sunshield can be detached from the housing.

A preferred embodiment of a cable harness assembly includes a shielded cable comprising a first and a second conductor for conducting a pair of differential signals, and a generally planar board having a first and a second electrically-conductive trace formed thereon and having a first and a second major surface. The first trace is electrically coupled to the first conductor at a first location on the first major surface and extends along the first major surface to a second location on the first major surface. The second trace is electrically coupled to the second conductor at a third location on the first major surface and extends along the first and the second major surfaces to a fourth location on the second major surface.

The modular cross-connect panel for cable lines of cabled networks comprises a support assembly defining a vertical front portion and a horizontal rear portion, together with female connectors retained on the front portion and connected to the lines of cables fixed on the rear portion. In the panel said support assembly comprises two separate rigid supports referred to as a "front" support and as a "rear" support, together with two assembly columns fixed to the front support and releasably holding the rear support. The panel is applicable to a distribution frame for use in operating cable networks.

The invention relates to the field of electric power system monitoring, in particular to a cable 10kV high voltage ring main unit remote monitoring and control system which is used for conducting real-time monitoring of operation conditions of power distribution facilities and distribution cable lines, realizing early warning and alarming of abnormal and failure states and postmortem analysis after accidents, and controlling and regulating the operating environment of equipment through remote operation. According to the cable 10kV high voltage ring main unit remote monitoring and control system, grid smart operation management serves as the target, various on-line monitoring techniques are integrated, and monitoring cameras, a fan and solar equipment are installed in a switching station; the system can be used for checking the information of the monitoring cameras in the switching station in real time, monitoring the operating state of the fan, realizing the early warning and alarming of the abnormal and failure states and the postmortem analysis after the accidents, realizing dynamic evaluation of health conditions of the equipment, and realizing remote operation control over monitoring of the equipment; a multi-dimensional display technology is combined, safe and reliable operation capacity of a distribution network is enhanced, trouble shooting efficiency and maintenance efficiency are improved, and therefore a complete set of grid visual monitoring system is formed.

A method for land seismic data acquisition is provided, together with a seismic cable and a cable spool vehicle for use in the method. In performing the method, the cable spool vehicle mechanically deploys seismic cable with attached sensors according to a desired geophysical spread and at a rate dependent upon the speed of movement of the vehicle substantially without tension in the cable. The cable spool vehicle also allows mechanical pick-up of the seismic cable together with the sensors after the seismic data acquisition.

A movable laboratory with high biological safety is composed of primary experiment cabin, person cleaning and technological supporting cabin including clothes exchanging room, buffering room and substance transfer window between them, air-tight flexible connection channel between said both cabins, and the connected water and air pipelines, cables and signal lines.

The invention relates to a self-adaptive method for single-phase grounding fault line selection of an electric distribution network by using S transformation energy relative entropy. The method comprises the following steps: when the zero-sequence voltage instantaneous value of a bus is out of limit, starting a fault line selection device immediately; performing S transformation on zero-sequence current in 1/4 cycle after the fault of each line, and calculating transient energy under each frequency of the zero-sequence current of each line by using a complex matrix obtained by the S transformation; and calculating the S transformation energy relative entropy under each frequency of each line and solving the comprehensive S transformation energy relative entropy of each line by using the super-strong recognition capability of the relative entropy to slight differences between signals, and self-adaptively selecting out the fault line by comparing the size of the comprehensive S transformation energy relative entropy of each line under all frequencies. Theoretical analyses and a large number of emulations show that the method effectively avoids the influence caused by a CT saturation discontinuous angle on the line selection, and is applicable to the cable-wire mixed line, pure cable lines and pure aerial lines.

The invention discloses a high-voltage cable insulation defect partial discharge on-line monitoring diagnosis method, which involves analyzing obtained partial discharge data of various actual manufacturing typical defects from the perspectives of time domain waveform characteristics, spectrum distribution differences, separate spectrum analysis and the like, and establishing a discharge database and a comparison database of the various defects. By use of a high-voltage cable partial discharge detection system, through utilizing signal separating technologies including a three-phase amplitude relation atlas, a three-frequency range amplitude relation atlas and the like, pulse current waveform parameter characteristic value integrated information is analyzed, a discharge accumulation spectrum of on-site measuring data and a same-kind characteristic pulsed discharge cluster are formed, and finally a comparison is made between the discharge accumulation spectrum and the same-kind characteristic pulsed discharge cluster and the discharge database of the various defects so as to determine whether insulation defects exist for an on-site running cable line. The method can solve the problem of difficult on-line monitoring diagnosis of insulation defect partial discharge of a conventional cable device, and also can improve the accuracy and sensitivity of high-voltage cable insulation defect partial discharge detection diagnosis.

The invention relates to an optical fiber sensor. The invention discloses an optical fiber destabilization detecting method combining based on a phase sensitivity light time domain reflection and a polarization sensitivity light time domain reflection method and distributed optical fiber sensing system thereof to improve the detecting accuracy and reliability of the optical fiber destabilization. The method comprises: a. injecting an optical signal with determined polarization state into the optical fiber; b. receiving the back rayleigh scattering light in the optical fiber; c. diving the rayleigh scattering light into two bundles to perform the Phi-OTDR data acquisition and the POTDR data acquisition; d. determining the destabilization and position thereof based on the distortion points of the Phi-OTDR data and the POTDR data. The invention also discloses an optical fiber destabilization detecting device. The technical scheme of the invention is used for monitoring and protecting the optical cable lines, thereby greatly improving the precision and the sensitivity of the monitoring system and reducing the erroneous judgment rate and the missing report rate.