172 results about "Lightning detection" patented technology

A lightning detection system for detecting and locating an initial discharge of an initial leader stroke of a lightning flash. An initial lightning discharge produces a pulse that can be used to accurately detect lightning, and more particularly, the location of the initial lightning discharge. In one embodiment, at least three sensors detect and determine the location of the first pulses from initial lightning discharges using time difference of arrival information of the pulses at each of the three sensors. In another embodiment, a single sensor is used to determine the range of an initial lightning discharge from the amplitude of a corresponding initial detected pulse, and to determine the direction from a crossed loop antenna An alternative embodiment of a single sensor system determines a distance of a lightning event from a peak amplitude value derived from a pulse amplitude distribution. In a further embodiment, a lightning detection system provides enhanced lightning location by incorporating weather data from a weather radar with detected lightning information.

The invention relates to a mobile radio-frequency enabled device. In order to enable a lightning detection by means of such a device, it comprises an electromagnetic interferences detection component detecting electromagnetic interferences in at least one radio-frequency channel, which at least one radio-frequency channel is usable by the mobile radio-frequency enabled device for a communication link. The device further comprises a processing component adapted to determine whether a lightning stroke can be assumed to have occurred in the vicinity of the mobile radio-frequency enabled device due to an electromagnetic interference detected by said electromagnetic interferences detection component. The invention relates equally to a corresponding system, to a corresponding method and to a corresponding software program product.

The invention relates to a digital lightning detection method and a device thereof. The method comprises the following steps: receiving an electromagnetic signal generated when cloud-to-ground flash lightning discharging to generate an electric detection signal; digitalizing the conditioned electric detection signal; filtering the digital signal; establishing a uniform time scale; establishing a lightning signal identification criterion and a digitized cloud-to-ground flash lightning signal identification model by a time determination method, a bipolar test method and a homopolar test method by considering transmission features of a lightning electromagnetic radiation waveform; establishing a time window preprocessing area, and acquiring a development trend of the input digital signal and the corresponding typical parameters; and computing and determining the parameters of the input digital signal in combination with data in the time window by the digitized cloud-to-ground flash lightning signal identification model . The device consists of an antenna, a signal conditioner, an analog to digital converter, a module of cloud-to-ground flash lightning signal identification model, a system control manager, an assistant control manager, a communication interface, an external memory and a clock.

A lightning detection system provides an estimated location of a lightning stroke. The system includes sensors, and an analyzer. Each sensor provides messages having sensor identification, an amplitude responsive to the lightning stroke, and a time of detecting the lightning stroke. The analyzer applies time corrections and amplitude corrections to improve the accuracy of determining the location of the lightning stroke. Time adjustments and amplitude adjustments for the time and amplitude corrections are recalled from a matrix accessed according to a suggested or estimated location. The matrix may be organized by coordinates of longitude and latitude.

The invention discloses a VHF (very high frequency) frequency-range intracloud lightning detecting and positioning system, which comprises a central treatment station and a plurality of detection and treatment sub-stations arranged in different positions, wherein the detection and treatment sub-stations and the central treatment station are accessed into a public wide area network in a wired or wireless mode; and through the wide area network, on one hand, obtained intracloud lightning detection data is uploaded to the central treatment station by the detection and treatment sub-stations, andon the other hand, the working state of each detection and treatment sub-station is remotely monitored by the central treatment station. The system can be used for precisely estimating the incidence directions of lightning radiation signals of a plurality of simultaneously occurring lightning radiation sources or the same lightning radiation source arriving at the detection sub-stations through different propagation paths, the arriving time difference of the lightning signals between any two detection and treatment sub-stations is calculated at the central treatment station (TDOA estimation),and the spatial position of an intracloud lightning radiation source is determined by DOA and TDOA information.

The invention discloses a lightning detection and positioning system and method, which relate to the technical field of meteorological detection. The system comprises an antenna unit, a receiver unit, a waveform characteristic extracting and processing unit and a monitoring and controlling unit, wherein the antenna unit is used for detecting an electromagnetic field variation signal while lightning happens, detecting a GPS satellite signal and transmitting the electromagnetic field variation signal and the GPS satellite signal to the receiver unit; the receiver unit is used for receiving the electromagnetic field variation signal and the GPS satellite signal; the waveform characteristic extracting and processing unit is used for extracting electromagnetic field variation signal waveform characteristic parameters in real time and analyzing the parameters to obtain a cloud ground flash identification result and a ground flash positioning result; and the monitoring and controlling unit is used for collecting and storing the waveform of the electromagnetic field variation signal in real time, marking the time of collecting the lightning waveform and displaying the position of the ground flash in a geographical information system in real time. The system and method disclosed by the invention, multifunctional single-station lightning detection and positioning of the lightning waveform collection and lightning strike-back positioning can be carried out.

A mobile radio-frequency enabled device that provides a reliable and inexpensive lightning alerting of a user. The device comprises an electromagnetic interferences detection component detecting electromagnetic interferences in radio-frequency signals received by the mobile radio-frequency enabled device for a communication link. The device further comprises a processing component to determine whether a lightning stroke can be assumed to have occurred in the vicinity of the device due to an electromagnetic interference detected by the electromagnetic interferences detection component, and to cause a notification of a user about an assumed lightning stroke via a user interface. The invention relates equally to a system which comprises such a device and a network element of a communication network, to a corresponding method and to a corresponding software program product.

A system for lightning detection is provided. The lightning detection system includes a conductor configured to receive a lightning strike and transmit a lightning induced current. The system also includes a fiber optic current sensor configured to detect multiple lightning parameters from the lightning induced current and to modulate a beam of radiation in response thereto. The system further includes an electro-optic module configured to receive and convert said beam of radiation from the fiber optic current sensor to an electrical signal.

The invention discloses a method and device for realizing thunder and lightning early warning based on thunder and lightning data mining and a storage medium. The method comprises the following steps:S10) analyzing atmospheric electric field intensity and radar echo, and when meeting preset conditions, starting a thunder and lightning warning process; S20) collecting satellite cloud picture dataand thunder and lightning location data, combining the satellite cloud picture data and the thunder and lightning location data and carrying out judgment and correction, and carrying out clustering analysis on the thunder and lightning data to obtain moving speed and direction of thunderstorm clouds; S30) according to the obtained thunderstorm cloud distribution, calculating moving speed and direction of the thunderstorm clouds through a linear regression method, and predicting the location and quantity of thunder and lightning at the next moment; and S40) dividing the area into different grids, and carrying out corresponding levels of thunder and lightning warning according to the predicated location and quantity of thunder and lightning. The thunder and lightning early warning method hasthe advantages of short warning time and high accuracy, reduces overall false alarm rate of a thunder and lightning detection network, improves thunder and lightning warning accuracy and reduces thunder and lightning early warning space accuracy.

A lightning detection system is presented. The lightning detection system includes a plurality of sensing devices configured to generate sensor signals representative of one or more working state parameters of an object. The lightning detection system further includes a lightning signal processing subsystem configured to combine the sensor signals representative of the one or more working state parameters received from the plurality of sensing devices to generate a composite signal, extract noise signals from the composite signal, and compare the extracted noise signals with one or more lightning signal profiles to determine existence of lightning noise signals in the extracted noise signals, wherein the lightning noise signals are induced in the sensor signals in response to a lightning strike on the object.

The invention relates to single-station quasi-three-dimensional lightning positioning device and method. By combining an acoustic signal and an electric signal generated by lightning, the reasonable configuration way of an antenna and a sensor array is designed; by utilizing one acoustoelectric combinative quasi-three-dimensional lightning positioning method, the quasi-three-dimensional positioning result and the space-time evolution process of a lightning discharge channel can be measured and obtained only through a single observation station; the positioning device and the method have the full lightning detection functions of ground lightning and cloud lightning; and simultaneously, the synchronous acoustoelectric comprehensive detection data of the lightning are provided. The positioning device and the method are applicable to weather with higher requirements on the detection precision and the positioning result of the lightning, the detection and the early warning of the lightningfor aviation, spaceflight and military departments, and also can be used as observing and measuring approaches for the physics and the protection research of the lightning.

The invention discloses an integrated device for lightning and ground electric field monitoring, and the integrated device comprises a ground electric field monitoring unit, a lightning detection unit and a signal and data processing unit, wherein the ground electric field monitoring unit comprises an MCU (Microprogrammed Control Unit) module, an electric field instrument, an amplifier, a filter and a self-checking/self-correcting module; the lightning detection unit comprises an antenna assembly, three pre-amplification electric circuits, three signal processing circuits, a waveform identification circuit, a photoelectric tube and an optical detection module; and the signal and data processing unit is used for processing received signals and transmitting the signals to a computer through a communication interface for displaying. The device integrates lightning predicting and locating functions into a whole, and can be used for overcoming the defects that single equipment is unlikely to carry and the detection precision is low, and improving the lightning monitoring precision and accuracy.

The invention relates to the technical field of lightning detection, in particular to a lightning positioning system based on a VHF radar and a lightning positioning method. The lightning positioningsystem comprises a VHF radar transmitting system and a radar receiving system arranged in the same station. The radar receiving system comprises an interference receiving antenna comprising at least two long baseline antenna arrays and at least two short baseline antenna arrays. Each of the long baseline antenna arrays and the short baseline antenna arrays comprises at least two pairs of receivingantennas. Terminals of the long baseline antenna arrays and the short baseline antenna arrays are provided with public receiving antennas. A distance between the adjacent two pairs of receiving antennas in each long baseline antenna array is greater than that of the adjacent two pairs of receiving antennas in each short baseline antenna array. The size of the receiving antennas is matched with the wavelength of VHF radar waves transmitted by means of a VHF radar transmission system. The positioning system can realize three-dimensional positioning of lightning and single-station positioning oflightning.

The present invention relates to a system and method for detecting lightning activity. When a lightning strike is close enough to a receiver, the strength of the signal received will cause the receiver to saturate. In such a situation, a non-filtered signal is used to calculate a range and bearing. In one specific embodiment, a receiver detects energy emitted by a lightning strike and separates the lightning strike to a filtered signal and non-filtered signal. A saturation detector determines if the filtered signal is saturated prior to the filtered signal being filtered. In response to the filtered signal being saturated, a processor processes the non-filtered signal from the receiver, estimates locations of the detected lightning strike relative to the system, determines a cumulative effect of the lightning strike spaced in distance and time, and generates display signals to illustrate the cumulative effect with respect to a grid.

The invention discloses an FPGA single event upset protection method and system for an FY-4A satellite lightning imager. The method comprises: the automatic detection of FPGA single-event flipping onthe FY-4A satellite lightning imager; the FPGA automatic refresh protection on the FY-4A satellite lightning imager; and the FPGA timing refresh protection on the FY-4A satellite lightning imager; automatic reset protection on the FY-4A satellite lightning imager. The method solves the technical problem of lacking single-event flip protection measures for the single-event effect study of the FY-4Asatellite lightning imager FPGA. According to the characteristics of lightning observation missions and the timeliness of lightning detection products recovery, the method adopts multiple measures ofsingle-event flip protection such as automatic discrimination and automatic command, dynamic refresh and timing refresh, software reset and hardware reset to realize FPGA single particle. Flip automatic recovery. Through the above work, the current FY-4A satellite lightning imager has effectively reduced the impact of single-event flipping effects on lightning detection products.

The invention discloses an integrated lightning early warning system and method. The system is composed of a lightning detection device, a database processing module and a lightning early warning module. The lightning detection device is used for detecting a lightning signal and sending the lighting signal to the database processing module; the data processing module is used for determining an early warning level of the received lightning signal and a lightning prevention measure corresponding to the early warning level based on combination of a pre-stored lightning level numerical table and a lightning prevention measure table, generating an early warning signal to the lightning early warning module when the early warning level is higher than a preset lightning early-warning threshold value, and generating a lightning prevention measure execution instruction; and the lightning early warning module is used for carrying out alarming based on an early warning signal. Therefore, the provided early warning system has high precision; the early warning time is sufficient; and full coverage of lightning monitoring of a protected area is guaranteed.

A lightning detection system provides an estimated location of a lightning stroke. The system includes sensors and an analyzer. Each sensor within range of a lightning event provides messages to the analyzer. Each sensor includes a waveform engine that converts a signal received from the lightning event to a series of frequency domain components having respective magnitude and phase. The waveform engine adjusts magnitudes and phases of the frequency components, for example, to mitigate the effects of terrain conductivity where the received signal traveled across terrain. The adjusted frequency components are then converted by the waveform engine into a second time domain signal that is described in a message to the analyzer. Each message includes sensor identification, peak amplitude, and time of detecting the lightning event. The analyzer provides an estimated location of the lightning stroke and an estimated peak current of the lightning stroke in accordance with messages received from sensors.

The invention relates to a lightning warning method applicable to distribution networks, which includes any of the following sub methods or a combination of a plurality of sub methods. In a first sub method, lightning is detected using a multi-vector photo-magnetic complex-mode induction technology to get the type, direction and relative distance of lightning, and a warning is then issued according to the type, direction and relative distance. In a second sub method, a power grid is partitioned, and a warning is issued according to the connection relationship of the partitions. In a third sub method, the lightning warning level is adjusted according to the real-time operation state of a power grid. In a fourth sub method, whether it is intra-cloud lightning or cloud-to-ground lightning is detected and identified, and a warning is issued according to the result of detection and identification. In a fifth sub method, a warning is issued by integrating real-time lightning detection data and near-earth electric field detection data. Through one sub method or the combination of a plurality of sub methods, the power flow distribution condition, the real-time load condition and the lightning protection of equipment in a power grid are considered, and the accuracy of power grid lightning warning can be improved.

The invention relates to a three-dimensional lightning detection system and method based on the Beidou. The three-dimensional lightning detection system comprises a time synchronizing system, a lightning detection station and a data monitoring center, wherein the time synchronizing system is used for building whole-network time synchronization in a bidirectional time service mode of Beidou satellite signals, obtaining high-precision time synchronization information and transmitting the time synchronization information to the data monitoring center, the lightning detection station is used for catching electric field signal changes caused by lightning and magnetic field signal changes caused by the lightning and transmitting electric field signal change information and magnetic field signal change information to the data monitoring center, and the data monitoring center is used for processing the received time synchronization information, the received electric field signal change information and the received magnetic field signal change information so as to achieve three-dimensional space-time detection to the lightning. The invention further relates to the three-dimensional lightning detection method based on the Beidou, wherein the working principle of the method is the same as that of the system. According to the three-dimensional lightning detection system and method based on the Beidou, accurate and reliable lightning space-time information detection is achieved, quasi real-time level lightning time detection can be achieved, meanwhile, detection reliability is improved through multi-station uniting, and the detection range is amplified.

The invention discloses a dynamic lightning protection method, which comprises the steps of carrying out real-time lightning detection; tracking a thunderstorm position; and carrying out dynamic lightning protection control on a power grid according to a power grid control strategy, wherein the power grid control strategy comprises one or more of the following strategies of (1) optimizing the operation mode of the power grid, changing a power flow path of the power grid and preventing the power flow of the power grid from passing through an area threatened by lightning; (2) adjusting the power flow of the power grid, reducing the power flow on a power transmission path in the area threatened by lightning and increasing the power flow on the power transmission path in a security area; and (3) carrying out nonlinear control through a generator/generation unit, dynamically controlling a power supply to control power flow output of the power grid and increasing power output in the security area. Meanwhile, the invention also discloses a dynamic lightning protection system. Dynamic lightning protection is achieved by combining real-time lightning tracking with power grid stability calculation according to one or more control strategies.