41 results about "Geomagnetic storm" patented technology

Various embodiments may provide an airborne system for measuring meteorological parameters, including a high altitude unmanned aerial vehicle (UAV) formed completely or partially of closed-cell polyurethane foam. In various embodiments, the UAV may include extendable wings configured to extend and retract as the UAV climbs and descends to different altitude levels. In various embodiments, the UAV may include one or more infrasonic sensors and wind screening configured to measure one or more meteorological parameters, such as wind shear, seismic waves, magnetic storms, magnetohydrodynamic waves, severe weather, tornadoes, hurricanes, meteors, and lighting. The infrasonic sensors may be configured to determine wind shear at the local and regional level. In various embodiments, other meteorological sensors may also be included in / on the UAV in addition to the infrasonic sensors.

The invention relates to a long-distance-delivery buried oil gas pipe network route selecting and optimizing method for resisting geomagnetic storm disasters. The long-distance-delivery buried oil gas pipe network route selecting and optimizing method for resisting the geomagnetic storm disasters comprises the steps that firstly, route selection is conducted by means of existing data and according to the current standard; secondly, geomagnetic storm disaster mutational sites of all alternative routes are found out by means of a pipe network geomagnetic storm disaster mutational site scanning searching method, and route optimization is conducted; and thirdly, a route selecting and optimizing result is output. According to the long-distance-delivery buried oil gas pipe network route selecting and optimizing method for resisting the geomagnetic storm disasters, by selecting and optimizing a a long-distance-delivery buried oil gas pipe network route, the number of geomagnetic storm disaster mutational sites can be reduced, the Dovetail peak of the pipe-to-soil potential is reduced, and accordingly the number of pipeline cathodic protection devices is reduced, pipeline corrosion protection cost is greatly reduced, the capacity to resist the geomagnetic storm disasters of a buried oil gas pipeline is improved, and the service life of the pipeline and relevant equipment is prolonged.

The present invention relates to a parking tolling method based on a double stable value of a geomagnetic platform. Its technical characteristics include the following steps: after the geomagnetic changes tend to be stable, the stable value of the current time period is used as a geomagnetic platform, and the previous time period's The stable value is regarded as a geomagnetic platform; the geomagnetic platform whose change value exceeds the threshold is regarded as an effective geomagnetic platform; The changing cut-off time is used as the cut-off time for parking billing; the server automatically charges according to the parking duration and combined with the vehicle identity. The present invention eliminates the zero-point calibration step from the traditional geomagnetic inspection method, and can also achieve the effect of accurate billing; effectively avoids the strict restriction of calibration time and calibration environment caused by manual zero-point calibration, and manual calibration is labor-intensive. time-consuming problem.

The present invention relates to a method for finding out the sudden change point of geomagnetic storm disaster of buried oil and gas pipeline network by using PNGSPSS, and find out the geomagnetic storm disaster of the whole pipeline network by scanning and searching the sudden change point of geomagnetic storm disaster of long-distance buried oil and gas pipeline network The sudden change point is beneficial to the buried oil and gas pipeline network to implement line optimization selection, pipeline electro-decoupling segmentation and cathodic protection measures for a section of pipeline; it can reduce the sudden change point of pipeline geomagnetic storm disasters, reduce pipeline PSP "swallow tail peak", and reduce pipeline cathodic protection The number of devices saves the cost of pipeline anti-corrosion; it can reduce the "negative" cumulative effect of geomagnetic induction current GIC and pipe-to-ground potential PSP produced by geomagnetic storm disasters in long-distance electrical continuity buried oil and gas pipeline networks, and avoid pipeline damage caused by geomagnetic storms. The bipolarity of the ground potential PSP of the pipes at both ends is too high, avoiding the damage of equipment such as potentiostats caused by the excessive geomagnetic induction current GIC of the pipeline caused by geomagnetic storms, improving the ability of buried oil and gas pipelines to defend against geomagnetic storms, and prolonging the life of pipelines and related equipment .

The invention discloses a flight path deduction and calibration method based on indoor geomagnetic track matching. The method comprises the following steps of (1) forward and reverse geomagnetic track matching; (2) three-dimensional geomagnetic fingerprints: three-dimensional original geomagnetic data with posture features, which are read by a geomagnetic sensor in a carrier coordinate system, are mapped to uniform three-dimensional geomagnetic fingerprints in a navigation coordinate system; (3) reverse geomagnetic fingerprints: a reverse geomagnetic track is generated according to a forward geomagnetic track; (4) a geomagnetic calibration triggering mechanism based on indoor and outdoor scene detection; (5) an indoor geomagnetic path matching algorithm based on a FastDTW algorithm. According to the flight path deduction and calibration method and device based on the indoor geomagnetic track matching, the training work at an early stage is not needed, an inertial sensor with low cost and auxiliary sensors are used, and an accumulated error of an inertial measurement technique is eliminated by utilizing the difference of indoor different path geomagnetic sequences, so that accurate positioning and navigation by personnel are realized without dependence of external environment deployment and in case of an emergency.

The invention discloses a measuring method and device for a buried oil-gas pipeline and a cathodic protection device. The GIC measuring method comprises the following steps: a current sensor is additionally mounted in an insulated-flange hook-line cable of the buried oil-gas pipeline so as to measure electric currents in the buried oil-gas pipeline; a current and voltage sensor is mounted in the cathodic protection device so as to measure electric currents and voltages in the cathodic protection device; a parameter identification method for on-line study is used to update the soil resistance parameters of the buried oil-gas pipeline, and calculate the GIC dynamic current of the buried oil-gas pipeline and the GIC dynamic current of the cathodic protection device in real time. Through the adoption of the measuring method disclosed by the invention, the problems in the indirect measurement of GIC and the dynamic current of the cathodic protection device are effectively solved; the GIC of the buried oil-gas pipeline at a cathodic protection station, and the GIC of the cathodic protection device at the cathodic protection station can be accurately monitored; the influence of a geomagnetic storm on the buried oil-gas pipeline can be correctly evaluated, and defensive measures can be taken in time to avoid major accidents.