840 results about "High tension line" patented technology

During a stand-by state in which power supply is cut off, a high-voltage power supply control circuit isolates a global negative voltage line transmitting a negative voltage and a local negative voltage line provided corresponding to each respective sub array block from each other and isolates a global ground line and a local ground line transmitting a ground voltage from each other. These local ground line and local negative voltage line are charged to a high voltage level through a high voltage line before cut-off from the corresponding power supply. A leakage current path from a word line to the negative voltage line or the ground line is cut off, so that the word line in a non-selected state can reliably be maintained at a non-selection voltage. Thus, in a low power consumption stand-by mode, data stored in a memory cell can be held in a stable manner.

The invention discloses a high-voltage generator used for an X-ray machine and a control method thereof. The high-voltage generator comprises a rectifying and wave-filtering and soft-start unit connected with a power supply, a control power supply, and a voltage rising and rectifying unit in a high-voltage oil tank. The high-voltage generator is characterized in that the rectifying and wave-filtering and soft-start unit is connected with a power factor correction unit, is connected with the positive pole of an X-ray tube in the high-voltage oil tank through a high-voltage inverter and the voltage rising and rectifying unit, and is connected with the negative pole of the X-ray tube through a filament inverter and a filament converting circuit; a sampling circuit connected with a central control unit is arranged inside the high-voltage oil tank; and the central control unit is respectively connected with the high-voltage inverter, the filament inverter and a host computer. Compared with the prior art, the high-voltage generator has the advantages that the high-voltage generator adopts a series-parallel resonance technique to realize the zero-voltage opening of a switch tube, and thus the switching frequency can be improved to 100 kHz; the problems of high voltage insulation and protection caused by extracting a high voltage wire externally connected with an X-ray tube from the high-voltage oil tank are avoided because that the X-ray tube is integrated inside the high-voltage oil tank.

A system and method, and robotic equipment for mechanical and/or electrical bypassing of short sections of energized high voltage line conductors by gripping the conductor at two close-by points, making good electrical and mechanical connection, then drawing the two points towards one another so as to relieve both mechanical and current-carrying duty of the bypassed conductor section. Doing so can provide slack on the bypassed conductor section for maintenance or repair while simultaneously providing an alternative path for electric current, or increase tension on the adjacent conductor sections by essentially shortening the conductor in the region where the invention is applied. The invention may then reverse direction, placing (stretch) tension on the bypassed conductor section and the point of repair to assure its mechanical integrity. Mechanical bypassing only to temporarily shorten specific conductor spans may be achieved by the same device. Electrical bypassing only may be achieved in a similar manner by gripping and bridging two separate high voltage conductors, thus providing a means to connect and/or disconnect them with the aid of switching equipment incorporated into the invention. The invention allows all of the foregoing to be accomplished at line potential and in close line proximity by virtue of its being mounted on an insulated boom or suspended from a hovering helicopter or suspended from the line itself.

The invention discloses a fog-haze environment simulation experiment device. The device comprises a closed fog-haze tank, a fog-haze production system, a parameter measuring system and a high-voltage discharge model system, wherein the fog-haze production system comprises a fog production system and a haze production system, the outputs of the fog production system and the haze production system are communicated with internal of the fog-haze tank; the parameter measuring system comprises a fog-haze concentration monitoring device, a fog-haze particle size distribution monitoring device and a temperature and humidity sensor; the high-voltage discharge model system comprises an aluminum bar, an aluminum plate and/or an insulator; a high-voltage sleeve with a built-in high-voltage wire is communicated with the internal of the fog-haze tank, the aluminum bar, and the aluminum plate and/or the insulator are arranged in the fog-haze tank. The simulation for the fog-haze test environment with controllable condition and in different degrees can be realized through the device disclosed by the invention, and the device is equipped with data monitoring equipment for performing the high-voltage test, and the research on external insulation interference of various electrical equipment aiming at the fog-haze environment of China is promoted.

The invention discloses a high voltage electric transmission line external damage-proof intelligent image pre-warning system and method. The system comprises front side monitor equipment, a rear side server and user side moving monitor terminals. The front side monitor equipment is arranged on high voltage line iron towers to monitor areas to be monitored. When an objective of hazardous operation is detected, a site image is sent to the server, warning messages and the link of the site image on the server are sent to the moving monitor terminals of corresponding electric inspection personnel, and the rear side server receives image information and performs image preservation and management, log management, and log-in information management of inspection personnel. The user side moving monitor terminals are cell phones which receive the image information and warning message information and send control instructions to the front side monitor equipment to warn in a voice mode. Through adopting an intelligent image recognition algorithm, the high voltage electric transmission line external damage-proof intelligent image pre-warning system and method can monitor field operation in high voltage line areas to be monitored automatically and provide an effective method to high voltage damage-proof applying requirements.

The invention relates to a combined mechanism of a ratchet of a high-volatage-cable walking robot. The combined mechanism is characterized by comprising a wheel type walking mechanism and claw-type clamping mechanisms, wherein the wheel type walking mechanism is used for walking on a high-voltage cable, the claw-type clamping mechanisms are used for clamping the high-voltage cable and provides positive pressure, the wheel type walking mechanism and the claw-type clamping mechanisms are arranged on a robot frame, and the claw-type clamping mechanisms are used in pairs. The combined mechanism disclosed by the invention utilizes a principle of an under-actuated mechanism, and two motion manners of rotation and movement are realized through one motor-driven clamping mechanism; through a self locking mechanism, the clamping mechanism is automatically locked after closed, thus the energy consumption is reduced; and the invention has the advantages of small and novel structure, high clampingefficiency and wide application range.

The invention discloses a novel conducting wire end ground clip, which comprises a wire clip main body, an auxiliary wire clip, a control lever and a driving mechanism. By combining and using the control lever, a crank link mechanism and a scissors mechanism, the chuck stroke of the wire clip is amplified to fulfill the aim of reducing the spiral circles and reducing the labor intensity. A chuck can be opened and closed by only rotating the control lever so that clamping and loosening actions of a high-voltage cable are quickly finished. With the innovation, the problem of overmany rotating circles of a wire clip of the conventional pure screw rod mechanism is solved, so that construction operation is simpler and more convenient, and the workload of detection personnel can be effectively reduced. Besides, the novel conducting wire end ground clip meats the requirement of adjustable angle between the wire clip and the control level by using an angle adjustment positioning bolt and an arc limiting slot of a sector plate.

The invention relates to a robot which can deice, inspect and pass through an obstacle on a high voltage line. The robot comprises a deicing cutter mechanism, a traveling mechanism, a following obstacle crossing mechanism, a symmetric centering mechanism and an inspection camera, wherein the inspection camera is arranged on the top of a robot body; a deicing cutter is powered by an eccentric crank slide block mechanism and driven by a motor shaft gear; the traveling mechanism consists of a friction wheel and a clamping device; the friction wheel transfers power by a chain wheel; and the following obstacle crossing mechanism consists of a fan wheel which is not fixedly connected with the friction wheel, conducts a function of suspending the robot body and rotates backwards along with an obstacle when the robot crosses the obstacle, so that obstacles such as overhung hardware and the like get across the robot body. The robot is driven by a motor, so that the deicing and inspection work of the high voltage line can be automatically finished, manual high-altitude dangerous accidents are avoided, and the efficiency of rescue and relief work is improved.

The invention provides a method for identifying an overhead high-voltage wire automatically from an infrared image, and aims to provide a method for extracting an overhead high-voltage wire from an infrared image reliably and accurately in real time. According to the technical scheme, the method comprises the following steps of: reading an infrared digital image which is shot from an outdoor scene into a computer program, and converting the image into a grayscale image; performing image segmentation, geometrical feature extraction, luminance feature extraction, edge contour extraction and piecewise linear feature extraction on the grayscale images by an image extraction program, and dividing the image into a target region and a background region; counting and identifying geometrical features, luminance features and piecewise linear features in the regions automatically by a feature comprehensive analysis and identification module, scanning and screening one by one, and removing suspected targets which do not have the infrared image feature of the high-voltage wire to obtain initial pixels of the image of the overhead high-voltage wire; and outputting and displaying the acquired final pixels of the image of the overhead high-voltage wire by a high-voltage wire pixel marking output module.

A high-voltage line foreign matter invasion target detection method includes the steps that an adjacent-frame image is extracted from a video monitoring terminal or a video, the extracted adjacent-frame image is preprocessed, the movement characteristic of the adjacent-frame image is extracted, foreign matter or an invasion target is detected, the foreign matter invasion target is marked through a morphological method, the foreign matter or the invasion target is tracked, whether a power transmission line is affected or not is judged, and if yes, an alarm is given. Through the method, the foreign matter invasion target is fast and accurately detected, a high-voltage line is monitored, and an actual application requirement can be met.

The invention provides a high-voltage inductive energy acquiring power supply and a method for acquiring the power supply from a high-voltage wire. The high-voltage inductive energy acquiring power supply comprises an energy acquiring unit for inducing a first electromotive force from the high-voltage wire, a compensating unit for inducing a second electromotive force different from the first electromotive force from the high-voltage wire and reversely compensating a part of the first electromotive force through the second electromotive force to finally balance output voltage, a surge protection unit connected to the energy acquiring unit and the compensating unit respectively, a rectifying filter unit connected to the surge protection unit and used for converting alternating current acquired by the energy acquiring unit and the compensating unit together into direct current and filtering the direct current, and a voltage reducing and stabilizing unit for stabilizing output voltage of the rectifying filter unit and reducing the stabilized voltage to be proper constant pressure output. Through introducing a compensating coil, the method uses difference of initial permeability of different magnetic materials to generate different electromotive forces to be reversely counteracted, so as to achieve wide-range compensation, output steady power, simplify circuits and reduce heat consumption.

A high efficiency high voltage ignition coil with segmented high voltage bobbin (15) with the last few bays (16,17,18) having fewer secondary winding turns than the average and thicker flanges separating the bays, and further including an inductor (20) of inductance at least 0.5 mH with a core material which is lossy in the 100 KHz to 1 MHz range, the inductor located between the end of the high voltage winding and the spark gap (7b) so as to reduce the peak voltages across the last few high voltage bays immediately following the spark gap breakdown.

The invention relates to a method for measuring the electric capacity and the dielectric loss of a capacitance type voltage transformer, comprising the following steps of: disassembling primary and secondary lead wires of a tested article, and connecting a secondary winding of the tested article to the ground in a short circuit way by a fuse wire; disassembling a lower-voltage terminal X point ofa compensation reactor of the tested article and an end shield to connect to the ground, wherein the end shield and the X point are both suspended in midair; connecting a measuring ground point of a full-automatic digital electrical bridge AI-6000 E to the ground; connecting a high-voltage line and a measuring line to the full-automatic digital electrical bridge AI-6000 E; switching on a main power switch, then switching on an inner high-voltage permitting switch, selecting positive connection wire, inner standard, frequency conversion and testing voltage 10 kV, and finally pressing a starting/pausing key to carry out measurement for more than 1 second; and after the measurement is finished, pressing an up arrow key and a down arrow key to look up data. The invention can effectively reduce measurement errors and is beneficial to objectively and accurately analyzing and evaluating the insulating conditions of equipment.

The invention provides an on-line monitoring device and an on-line monitoring method for accurately measuring the breeze vibration of a high-tension line. The device consists of a rectangular metal shell and a vibration detection circuit which is arranged in the rectangular metal shell, wherein the vibration detection circuit comprises a vibration sensor circuit, a signal amplifying circuit, an analog/digital (A/D) conversion circuit, a data storage circuit, a clock circuit, a micro control unit (MCU), a wireless communication circuit and a micro vibration generator circuit; the micro vibration generator circuit supplies power to the vibration detection circuit; the sensor circuit timely acquires vibration data; the vibration data is subjected to signal amplification and A/D conversion and then sent to the MCU; after corresponding operation, the vibration data is wirelessly sent to a monitoring person and stored; if the vibration detection circuit detects that vibration amplitude or frequency is over-high and exceeds a preset threshold value, a corresponding signal is transmitted to the monitoring person for early warning; and the monitoring person can take remedial measures in advance according to specific situations to reduce loss. The invention is applicable to on-line monitoring of the high-tension line.

The invention relates to a battery charge forecasting method and a device which can effectively forecast the battery charge state of a vehicle. The invention has two technical proposals based on the same invention concept: 1. the battery charge forecasting method is characterized in that the charge and the discharge between a high voltage battery and an inverter of the whole vehicle part are carried out through a high-voltage wire, and a main controller obtains the current charge state according to the charge and the discharge current signals, the battery temperature signal and the battery voltage signal. 2. The battery charge forecasting device for realizing the method is characterized in that the device is provided with a battery current sensor and a battery temperature sensor; the current sensor and the temperature sensor are respectively connected with a current detection loop and a temperature detection loop; the device is simultaneously provided with a battery voltage detection loop; single output ends of the temperature detection loop, the current detection loop and the voltage detection loop are connected with an A/D converter; and the single output end of the A/D converter is connected with the main controller.

A byte select circuit of a memory cell array wherein each column of the memory cell array has two byte select lines. A first byte select line is coupled to the even numbered rows in the column and a second byte select line is coupled to the odd numbered rows in the column. The second byte select line is configured to be driven to a low voltage level when the first byte select line is driven to a high voltage level, thereby minimizing or eliminating any parasitic voltage coupling between adjacent rows of memory cells.

A current sensor is provided including a Rogowski coil in an assembly that is easily positioned about a conductor, e.g. without cutting the line or deenergizing the line. In one arrangement, the Rogowski coil is formed about a split helical structure such that the ends of the Rogowski coil are not coincident. While this does introduce a small error in the current measurement, this small error is easily correctable by calibration and/or application software. The current sensor includes suitable insulation such that it can be placed about energized, high-voltage lines.

The invention discloses an unmanned aerial vehicle vision wire patrol method based on gradient constraint Radon transform. The method comprises the following steps: 1) obtaining a high-voltage line image to be processed by utilizing an unmanned aerial vehicle image acquisition device and converting the obtained degraded image into a grayscale image F; 2) carrying out edge extraction on the grayscale image F to obtain an edge image F'; 3) carrying out gradient calculation on the edge image F' to obtain gradient magnitude Gk; 4) setting eight direction pixel points of the kth pixels in the edge image F' being ki, wherein i=0,1,...,7, and when the gradient magnitudes Gk of the adjacent two pixels ki are same, grouping the pixels to the same line support region; 5) for the line support region obtained in the step 4), carrying out fitting to obtain a straight line according with conditions, and carrying out follow-up processing on the fit straight line through mathematical morphology; and 6) detecting a power transmission line through Radon transform according to the fitting result obtained in the step 5). The method realizes detection accuracy of the power transmission line in the image, removes redundant edge information and improves accuracy of power transmission line identification.

The invention aims to provide a cable deicing robot for a transmission line, which comprises a main obstacle-crossing device, two deicing cars and two telescopic arms, wherein the two telescopic arms are respectively installed at the two end of the main obstacle-crossing device; and the two deicing cars are respectively installed on the two telescopic arms. The cable deicing robot has the beneficial effects that three cables are simultaneously deiced under the matching of the main obstacle-crossing device, the two telescopic arms and the two deicing cars on the two telescopic arms, the cable deicing robot can be applied to a 35 kV line, a 66 kV line, a 110 kV line and other high-tension lines on which the three cables are horizontally arranged, and the effect that one robot can simultaneously deice the three cables at one time is realized; and not only can obstacles on the cables be crossed, but also poles and towers can be crossed, so that the continuous operation on multiple lines is realized, and the situation that when reaching each pole and each tower, a line worker needs to repeatedly ascend the pole/tower to install and disassemble the robot is avoided.

A wildlife protector guard is provided for a high voltage electrical termination in a high voltage electrical power distribution system. The guard is provided by an electrically insulating shell having a central section concentrically surrounding an axial end of the termination, and having one or more line extension sections extending along and concentrically surrounding a respective given length of a high voltage line conductor connected to an ohmic connection at the axial end of the termination, and having a termination extension section extending along and concentrically surrounding a portion of the termination.

The invention discloses a high-voltage line inspection robot of wheel mechanisms. The high-voltage line inspection robot with the wheel mechanisms can grab positions of wires without accurate positioning, is wide in applicability and high in versatility performance, is not easily affected by external factors during barrier crossing, and is high in stability. The technical solution scheme employed by the invention is that the high-voltage line inspection robot with the wheel mechanisms comprises an industrial camera and a power supply system and is characterized by further comprising at least three independent inspection modules coaxially connected via shaft couplings, each inspection module is provided with two wheel mechanisms which can rotate and can be open and closed as a transmission shaft rotates, each inspection module is provided with a power system controlling the opening and closing of the wheel mechanisms, and at least one inspection module is provided with a power system controlling rotation of the wheel mechanisms.

An angle adjustable type wire end ground clamp comprises a clamp body, a transmission mechanism, an angle adjusting mechanism and an operating rod. By combining and utilizing the operating rod, a straight tooth bevel gear wheel and the thread transmission mechanism, the purposes of decreasing the number of spiral coils and relieving the labor intensity are achieved by enlarging the stroke of a chuck of the clamp. The chuck can be opened and closed only by rotating the operating rod, so that a high-tension cable is clamped and released rapidly. The angle adjustable type wire end ground clamp solves the problems that a traditional clamp mechanism is complex in structure and not firm in clamping, so that construction operation is easier, safer and more convenient, workloads of detection personnel can be effectively lowered, and safety is improved. In addition, the requirement for the adjustable angle between the clamp and the operating rod is met through an angle adjusting and locking bolt and an arc limit groove of a sector plate.

The invention relates to a high-voltage cable electromagnetic-fingerprint distribution based unmanned-aerial-vehicle navigation system which comprises an unmanned-aerial-vehicle flight subsystem (14),a data processing subsystem (16) and a ground control subsystem (15). The unmanned-aerial-vehicle flight subsystem (14) transmits high-voltage cable electromagnetic field strength data to the data processing subsystem (16), the data processing subsystem (16) has data matched in a fingerprint database to acquire unmanned-aerial-vehicle real-time position coordinates, and the ground control subsystem (15) navigates an unmanned aerial vehicle according to the real-time position coordinates, wherein the fingerprint database contains corresponding information of high-voltage cable electromagneticfield strength and the position coordinates. Compared with the prior art, the high-voltage cable electromagnetic-fingerprint distribution based unmanned-aerial-vehicle navigation system has the advantages that the unmanned aerial vehicle is positioned and navigated by the aid of the electromagnetic field strength fingerprint information around a high-voltage cable, which is complementary to a traditional satellite navigation mode, and position stability of the unmanned aerial vehicle under high-voltage inspection environment is improved.