1589 results about "Ground line" patented technology

The invention discloses an unmanned aerial vehicle inspection and power transmission operation control method and system based on path planning. The method comprises the following steps: constructing a three-dimensional environment model of a target area; constructing a total cost function at the cost of distance, weather risk, energy consumption and electromagnetic interference; taking the minimum total cost function as a target, and obtaining an inspection path of the unmanned aerial vehicle in the target area, so that the unmanned aerial vehicle flies based on the inspection path; in the flight process of the unmanned aerial vehicle, the inspection path is corrected in combination with the dynamic obstacle influence factors; the dynamic obstacle influence factor is determined by the distance between the unmanned aerial vehicle and the dynamic obstacle, the speed of the dynamic obstacle and the acceleration of the dynamic obstacle; in the flight process of the unmanned aerial vehicle, the airborne electricity testing device is controlled to measure the line voltage, and the airborne ground wire hanging and dismounting device is controlled to carry out ground wire hanging and dismounting operation according to the measured line voltage. According to the embodiment of the invention, dynamic obstacles encountered by the unmanned aerial vehicle in the flight process can be avoided, and collision is avoided.

The invention provides an electrode plate, a tumor electric field treatment system and a temperature detection and signal control method, the electrode plate comprises a flexible circuit board and a plurality of electrode units arranged on the flexible circuit board at intervals, and the plurality of electrode units are divided into a plurality of row groups and a plurality of column groups on a circuit. The electrode unit includes a dielectric element and a temperature sensor having a signal terminal and a ground terminal, and the dielectric element is short-circuited with the signal terminal of the temperature sensor. A plurality of conductive traces are embedded in the flexible circuit board, the plurality of conductive traces comprise a plurality of grounding wires and a plurality of dual-purpose signal wires, the grounding wires are arranged in one-to-one correspondence with the column groups, and the grounding wires are in short circuit with the grounding ends of the temperature sensors corresponding to the electrode units of the corresponding column groups and then are grounded. The dual-purpose signal lines are arranged in one-to-one correspondence with the row groups, and the dual-purpose signal lines are connected in series with the electrode units of the corresponding row groups.

The invention provides an electrode plate, a tumor electric field treatment system and a temperature detection and signal control method, the electrode plate comprises a flexible circuit board, a plurality of electrode units and a handshake chip, the plurality of electrode units and the handshake chip are arranged on the flexible circuit board, and the plurality of electrode units are divided into a plurality of row groups and a plurality of column groups on a circuit. A plurality of conductive traces are embedded in the flexible circuit board and comprise a plurality of grounding wires in one-to-one correspondence with the row groups, a plurality of dual-purpose signal wires in one-to-one correspondence with the column groups, a communication wire connected with corresponding parts of the handshake chip and a grounding trace for grounding the handshake chip; the grounding wire and each electrode unit of the corresponding row group are short-circuited and grounded, and the dual-purpose signal wire transmits an alternating-current electric signal to each electrode unit in a first mode and transmits a direct-current electric signal to each electrode unit in a second mode so as to collect a temperature signal.

A method, computer program product, and sensor chip for use as a quantum magnetometer. A sensor chip may be fabricated, wherein the sensor chip may include an adhesion layer, a conduction layer, a signal line, a ground line, and a constriction region. The signal line may be shorted with the ground line in the constriction region.

The invention provides a personnel safety dynamic early warning method and system for distribution network line operation, and relates to the technical field of intelligent power grid management, and the method comprises the steps: calling an operation work ticket which comprises a work task, operation personnel information, safety measure requirements, grounding wire installation information, and a regulation and control instruction; text semantic structuring preprocessing is executed, and three-dimensional security features are extracted; security statement extraction is carried out, and a structured task template is established; when the positioning information of the target operating personnel is identified to accord with the area range of the target area, activating the target area; establishing a time sequence working data set based on ground wire intelligent sensing and operation tool intelligent sensing; and performing security verification, and generating a security dynamic early warning. According to the invention, the technical problem that the response speed and accuracy of safety early warning are reduced because the safety assessment of the operation task is not accurate enough due to the lack of an intelligent information extraction and task verification mechanism in the distribution network line operation in the prior art is solved.

The invention provides an adapter and a tumor electric field treatment system, an electrode plate comprises a plurality of electrode units and a plurality of temperature detection units, the plurality of temperature detection units are divided into a plurality of row groups and a plurality of column groups, and the grounding ends of the temperature detection units in each row group are connected to the same grounding wire. The signal end of each temperature detection unit in each column group is in short circuit with the corresponding electrode unit and then is connected to the same dual-purpose signal line; a bidirectional change-over switch of the adapter is configured to switch a dual-purpose signal line to be connected to a temperature sampling point or an alternating power line, and when the dual-purpose signal line is connected to the temperature sampling point, each grounding line is conducted in sequence so that a temperature detection signal detected by each temperature detection unit is sampled based on the temperature sampling point; and when the dual-purpose signal line is communicated with the alternating power line, an alternating current signal is transmitted to each electrode unit through the dual-purpose signal line, so that partition control and comprehensive temperature detection of the electrode plate are realized.

The invention provides a tumor electric field treatment system and an electrode slice temperature detection method, the system comprises an electrode slice and a controller, the electrode slice comprises a plurality of electrode units and a plurality of temperature detection units, the plurality of temperature detection units are divided into a plurality of row groups and a plurality of column groups, the grounding ends of the temperature detection units in each row group are jointly connected to the same grounding wire, and the signal ends of the temperature detection units in each column group are connected to the same dual-purpose signal wire after being in short circuit with the corresponding electrode units; when the dual-purpose signal line is connected to the temperature sampling point, the grounding wires are sequentially conducted, so that temperature detection signals detected by the temperature detection units are sampled based on the temperature sampling point; when the dual-purpose signal line is connected to the alternating power line, alternating electric signals are transmitted to the electrode units. In this way, a plurality of electrode units can be zoned and controlled using fewer conductive traces.

According to one embodiment, a strain detection device includes a sheet base material, a plurality of strain gauges arranged in a first direction on the sheet base material, a plurality of power supply lines and a plurality of first signal lines each connected to one end of a respective one of the plurality of strain gauges, and a plurality of ground lines and a plurality of second signal lines each connected to an other end of a respective one of the plurality of strain gauges, and a dummy pattern provided on the sheet base material and located between two of the plurality of strain gauges adjacent to each other in the first direction.

The invention provides a tumor electric field treatment system, a temperature detection method and a signal control method, the tumor electric field treatment system comprises at least one pair of electrode plates, an electric field generator and an adapter, each electrode plate comprises a plurality of electrode units and a flexible circuit board, the flexible circuit board is provided with a plurality of grounding wires and a plurality of dual-purpose signal wires, each grounding wire enables the electrode units in the same row to be short-circuited and grounded, and each dual-purpose signal wire enables the electrode units in the same column to be electrically connected and transmits an alternating current electric signal in a first mode and transmits a temperature detection signal in a second mode. The adapter comprises a plurality of groups of multi-path circuit lines, and each group of multi-path circuit lines is electrically connected with the multi-path dual-purpose signal lines and the multi-path grounding lines of the corresponding electrode plates in a one-to-one correspondence mode so as to transmit alternating current electric signals or direct current electric signals for temperature detection. Part of each group of multi-path circuit lines are conducted when alternating current electric signals are transmitted, part of each group of multi-path circuit lines are conducted when direct current electric signals are transmitted, corresponding electrode plates can be matched, and idle circuit lines are avoided.

The invention discloses a cable defect detection device and method. The detection device comprises a high-frequency current sensor, a signal acquisition module, an algorithm analysis module, a high-frequency pulse detection module and a fault diagnosis module, the high-frequency current sensor is used for detecting a current pulse signal on a cable grounding wire, converting the current pulse signal into a voltage signal and transmitting the voltage signal to the signal acquisition module; the signal acquisition module is used for amplifying, filtering and detecting the voltage signal; the algorithm analysis module is used for carrying out feature extraction and analysis on the processed voltage signals and carrying out feature classification and clustering on the voltage signals; the high-frequency pulse detection module is used for carrying out noise reduction processing on the voltage signal and extracting the voltage signal representing the partial discharge defect of the cable; and the fault diagnosis module is used for determining the type and degree of the cable defect according to the voltage signal representing the partial discharge defect of the cable and historical data. Cable line faults are rapidly judged, and the reliability of a power supply system is improved.

A data storage device includes a bad block management system. The bad block management system detects a grown bad block of the data storage device. When a grown bad block is detected, the bad block management system initiates a manual block write process on the wordlines associated with the grown bad block. The manual block write process includes programming the wordlines of the grown bad block in a particular state and with a voltage that closes a leakage path between a bit line associated with the grown bad block and a ground line or a ground path associated with the grown bad block.

The invention relates to the technical field of power distribution network fault early warning, and discloses an early warning system and method for a power distribution network ground fault. The data acquisition module of the system acquires multi-mode monitoring data such as zero-sequence current waveform, grounding wire current amplitude phase, insulator leakage current and environment temperature and humidity of the power distribution network in real time, and comprehensively reflects the operation state of the power distribution network. And the feature fusion module performs spatial-temporal feature compensation on the multi-modal monitoring data to generate a fault feature tensor, so that the insulation degradation evolution period of the topological node of the power distribution network is determined, and the insulation state change is accurately evaluated. And the risk deduction module analyzes a dynamic communication path of the topological structure of the power distribution network, performs fault conduction modeling, determines a ground fault risk situation level in combination with multi-modal monitoring data, and comprehensively considers fault conduction characteristics and operation conditions. The early warning decision module generates a dynamic early warning strategy according to the insulation degradation evolution period and the risk situation level, and the early warning mode is flexibly adjusted.

A power feeding device that is connected to a Faraday cage containing a flight vehicle via a conductor and supplies lightning power generated from a lightning surge that has struck to a battery of the flight vehicle, and a ground line that connects the power feeding device and a ground surface are provided, the power feeding device includes a capacitor connected in series between the Faraday cage and the ground line, a lightning arrester connected in parallel to the capacitor, and a step-down converter that steps down a terminal voltage of the capacitor charged by the lightning surge to generate lightning power and supplies the generated lightning power to the battery.

The invention provides power conversion equipment. The power conversion equipment comprises a power conversion circuit, a controller, a first capacitor, a first wire and a second wire, the first wire is connected in series with a first inductor; an alternating-current output end of a first bridge arm in the power conversion circuit is connected with a first wire, a first end of a first capacitor is connected with one side of a first inductor, and a second end of the first capacitor is connected with a direct-current end of the power conversion circuit and a second wire; wherein the first wire is a live wire, and the second wire comprises at least one of a zero wire and a ground wire; the controller injects a harmonic signal of a first target frequency into a first bridge arm in the power conversion circuit, and when the voltage amplitude of a voltage signal of the first target frequency generated between the first wire and the second wire is within a first target range, information of abnormal connection of the second wire is output. Whether the zero line or the ground line is connected abnormally can be detected, the stability and the safety of power supply are ensured, meanwhile, the method is suitable for various power grid systems and power supply scenes, and the reliability is high.

The invention relates to the technical field of cable insulation detection, and discloses a power cable insulation state evaluation method and system based on multi-dimensional feature fusion, and the method comprises the steps: collecting a high-frequency current signal on a cable grounding wire, extracting a power frequency phase, a discharge amplitude and a pulse frequency band width, and carrying out the normalization processing, thereby obtaining a sample set; calculating a local sparseness adaptive factor of each sample point, and calculating an energy weighted local density of each sample point; calculating the relative distance of each sample point, constructing a decision value, and determining the sample point with the larger decision value as a clustering center; calculating the path transmission reliability of the non-clustering center sample points relative to each clustering center, distributing the sample points with the path transmission reliability meeting a preset condition to the corresponding clustering center, and if the preset condition is not met, marking the sample points as noise; and extracting statistical characteristics according to the separated discharge clusters, and evaluating the insulation state of the cable by using a preset fault diagnosis rule base. According to the invention, the accuracy of cable insulation state evaluation can be improved.

The invention provides an electrode slice temperature detection method and an alternating current signal application method for tumor treatment. According to the method, a direct-current electric signal is transmitted to a dual-purpose signal line of an electrode plate, and grounding wires are sequentially conducted in a time-sharing manner, so that temperature detection signals detected by temperature sensors are acquired line by line. The dual-purpose signal wire and the grounding wire of the electrode plate are controlled in a combined mode to collect the temperature detection signals detected by the temperature sensors, the temperature can be comprehensively and accurately monitored, the number of conductive traces is effectively reduced, and efficient and accurate electrode plate control is achieved. In addition, alternating current electric signals applied to the dielectric elements of the electrode plate can be controlled or adjusted according to the collected temperature detection signals, low-temperature scalding can be avoided, and the use safety of the electrode plate is improved.

The invention provides a tumor electric field treatment system and an electrode slice quality detection method, the system comprises electrode slices, each electrode slice comprises a plurality of electrode units and a plurality of temperature detection units, the plurality of electrode units are divided into a plurality of row groups and a plurality of column groups, the grounding ends of the temperature detection units in each row group are short-circuited to the same grounding wire, and the grounding ends of the temperature detection units in each column group are short-circuited to the same grounding wire; the signal end of each temperature detection unit in each column group is in short circuit with the corresponding electrode unit and then is jointly connected to the same dual-purpose signal line. Thus, the electric field generator or the adapter can use fewer conductive traces to perform partition control on a plurality of electrode units and sampling of temperature detection signals, and can perform quality detection on the electrode slices based on the sampled temperature detection signals.

Embodiments of the present application provide a fault detection system, a fault detection method and a CAN bus device. The fault detection system comprises: a first sampling module, which is connected between a CAN transceiver and a CAN controller, and is used for acquiring a sent logic signal and a received logic signal of the CAN transceiver, and, when the sent logic signal and the received logic signal both indicate that the CAN bus is in a dominant state, outputs a first enabling signal indicating a sampling result; a second sampling module, one end of the second sampling module being connected between a ground wire and the CAN bus, and the other end outputting a sampled voltage; a detection module, which is connected to the first sampling module and the second sampling module, and is used for detecting whether the sampled voltage matches a first reference voltage of the CAN bus in a recessive state in response to the first enabling signal; a fault judgment module, which is connected to the detection module, and is used for converting a detection result into a ground fault index of the CAN bus when the sampled voltage does not match the first reference voltage.

The invention relates to an obstacle detection method and device, electronic equipment and a readable storage medium. The method comprises the steps of obtaining a to-be-detected image shot by a robot; inputting the to-be-detected image into an obstacle detection model, and determining key point information corresponding to a grounding wire in the to-be-detected image and semantic segmentation information corresponding to the to-be-detected image through the obstacle detection model; determining first pixel information belonging to the ground wire in the to-be-detected image based on the key point information, and determining second pixel information belonging to the ground wire in the to-be-detected image based on the semantic segmentation information; determining a target pixel belonging to the obstacle based on the first pixel information and the second pixel information; and determining a predicted position of the obstacle relative to the robot based on the target pixel, and determining a predicted category of the obstacle based on the semantic segmentation information corresponding to the target pixel. By adopting the method, the types of the detectable obstacles can be increased, so that the detection precision of the obstacles is improved.

A vehicle includes a window having an antenna assembly. The window includes a glass surface, a metal frame around the glass surface, and a set of defroster wires in the glass surface. A top wire of the set of defroster wires is separated from a top edge of the metal frame by an antenna region. The antenna is disposed in the antenna region. The antenna has a first end and a second end opposite the first end. The first end intersects a horizontal cover line of the metal frame tangentially. A feed line connects to the first end at the horizontal cover line. A ground line electrically couples the second end of the antenna to the metal frame.

The invention relates to a digital active EMI filtering method and circuit based on square wave analysis and reconstruction, and the method comprises the steps: obtaining common-mode noise source waveform data of a Buck circuit; determining compensation capacitance parameters according to a compensation circuit equivalent model, and generating compensation voltage data reduced by the common-mode noise source waveform data in an equal ratio; synchronously outputting PWM and the compensation voltage data through a synchronous control mechanism, and injecting the PWM and the compensation voltage data into a ground wire; and measuring the time delay between the PWM output signal and the DAC output signal, and reconstructing the compensation voltage data to carry out time delay compensation. By adopting the digital active EMI filtering method and circuit based on square wave analysis and reconstruction provided by the invention, time delay can be eliminated and common-mode EMI noise can be reduced while no detection is realized, the cost is reduced and the size is reduced.

The present invention discloses a broadband high-steepness filter based on the embedding of a piezoelectric acoustic resonator and an LC passive circuit, which includes a ladder-type filtering network and an LC resonance network. The ladder-type filtering network and the LC resonance network are connected in series in sequence, or the ladder-type filtering network and the LC resonance network are connected in series at intervals in sequence. The ladder-type filtering network includes a filtering series main path and a plurality of filtering parallel branches. The first end of the filtering series main path serves as the input end, and both ends of the filtering parallel branches are respectively connected to the ground wire and the series main path. At least one series hybrid resonance unit is arranged on the filtering series main path, and the series hybrid resonance unit is used to form poles in the passband to expand the passband bandwidth. At least one acoustic resonator or parallel hybrid resonance unit is arranged on the filtering parallel branch. This filter can achieve a relatively high bandwidth, a relatively high out-of-band rejection, and a relatively narrow transition band.

An information handling system includes a printed circuit board. The printed circuit board includes first and second pads of a first differential pair, a hatched ground, and first and second traces of a second differential pair. The first and second pads of the first differential pair are routed a surface of the printed circuit board. The hatched ground routed within a first layer of the printed circuit board. The first and second traces of the second differential pair are routed below the first and second pads and the hatched ground within a second layer of the printed circuit board. The hatched ground dampens crosstalk between signals on the traces and signals on the differential pair pads.

At least one embodiment of the present disclosure provides a memory array, an electronic device, and an operation method for a memory array. The memory array comprises a plurality of non-volatile static memory storage units, a plurality of power lines, and a plurality of ground lines. The plurality of non-volatile static memory storage units are arranged into a plurality of rows and a plurality of columns and are configured to perform data storage and data backup and recovery. The plurality of power lines are configured to provide the plurality of non-volatile static memory storage units with a first power supply voltage, the plurality of power lines each being electrically connected to a corresponding column of storage units in a first direction, and the plurality of power lines being shorted in a second direction. The plurality of ground lines are configured to provide the plurality of non-volatile static memory storage units with a second power supply voltage, the plurality of ground lines each being electrically connected to a corresponding column of storage units in the first direction, and the plurality of ground lines being shorted in the second direction. According to the described memory array, when data recovery is performed in one row of storage units at the same time, the voltages of the power lines can be kept stable.

An electronic device is provided. The electronic device includes a slidable housing including a first housing and a second housing, a first substrate included in the first housing and including a processor, a second substrate included in the second housing, a flexible printed circuit board (FPCB) which includes a ground line, electrically connects the first substrate and the second substrate to each other, and has a shape changed according to the movement of the slidable housing, and a matching circuit electrically connecting the first substrate and at least a portion of the ground line of the FPCB, and changing impedance under the control of the at least one processor according to the shape of the FPCB.

A method of performing a camera to ground alignment for a camera system on a vehicle. The method includes determining if enabling conditions have occurred and estimating a location of a vanishing point in a source image. Ground lines are selected based on a source image. A lane line detection is performed based on clustering of the ground lines to determine lane lines in the source image. At least one of pitch, yaw, or roll of the vehicle are estimated from the source image. A cost function based on estimates of pitch, yaw, and roll is minimized to obtain an optimal pitch value, an optimal yaw value, an optimal roll value, and lane lines from the source image. A sliding window-based refinement is performed on source images. Alignment results are broadcast to a downstream application or it is determined if the camera system on the vehicle is misaligned.

A flexible circuit board and a foldable electronic device includes a first multi-layer region, a second multi-layer region and a highly bendable region disposed between the first multi-layer region and the second multi-layer region. The first multi-layer region and the second multi-layer region include a structure in which a plurality of copper clad laminates (CCLs) are stacked. The highly bendable region includes a structure in which a single CCL extending from one CCL among the plurality of CCLs in the first multi-layer region and the second multi-layer region is stacked. The single CCL may be configured such that a first ground wire, a second ground wire, and a plurality of sub wires disposed to be spaced apart between the first ground wire and the second ground wire transmit a single RF signal.

The utility model provides a short-circuit protection circuit for a Type-C interface, and belongs to the technical field of short-circuit protection circuits. Comprising an interface module, an overvoltage and electromagnetic protection circuit and a switching circuit, the interface module, the overvoltage and electromagnetic protection circuit and the switching circuit are connected in series on the same power line and grounding line, and a common circuit and a standby circuit are arranged in the switching circuit and are both connected with the power line. According to the utility model, through the cooperation of the resettable fuse, the double-pole double-throw relay and other elements, the circuit can be rapidly switched so as to ensure that the interface can continue to work normally without maintenance when a short-circuit fault occurs, and through the synergistic effect of the gas discharge tube, the first transient suppression diode, the second transient suppression diode, the electrolytic capacitor and other elements, the short-circuit fault of the interface can be effectively prevented. The problems of overvoltage and electromagnetic interference during short circuit can be effectively relieved.

The utility model discloses an insulation resistance detection circuit and new energy equipment. The insulation resistance detection circuit comprises a first resistor, a second resistor, a first switch and a second switch, the first resistor and the first switch are connected in series to form a first detection branch, and the second resistor and the second switch are connected in series to form a second detection branch; the first detection branch and the second detection branch are connected in parallel and then are connected between a negative DC bus and a grounding wire or between a positive DC bus and the grounding wire. According to the insulation resistance detection circuit and the new energy equipment, the insulation resistance detection circuit is composed of the first resistor, the second resistor, the first switch and the second switch, the circuit structure is simple, the cost is low, and the ground insulation resistance of the equipment can be effectively detected.

The invention relates to a strip line short section directional coupler, relates to the technical field of communication, and is used for improving the directivity of the strip line short section directional coupler. The strip line short section directional coupler comprises a radio frequency main line, a strip line coupling circuit and a capacitance compensation circuit, the strip line coupling circuit comprises a coupling line, two beveled edge corners and two vertical lead-out strip lines, two ends of the coupling line are respectively connected with one end of one beveled edge corner, and the other end of the beveled edge corner is connected with one end of one vertical lead-out strip line; the radio frequency main line comprises an input end, a coupling main line and an output end, and the coupling main line and the coupling line are coplanar and parallel to each other; the capacitance compensation circuit comprises a metal cylinder group which is connected with an upper-layer ground wire and a lower-layer ground wire of the strip line coupling circuit, and the metal cylinder group is located on the outer side of the bevel cut edges of the two bevel cut edge corners at the two ends of the coupling line and is in bilateral symmetry about the perpendicular bisector.