The invention relates to a method for monitoring and calculating settlement of coal mining surface based on unmanned aerial vehicle remote sensing, comprising the steps of I, planning an unmanned aerial vehicle flight line according to landform, range, position and ground resolution of a research area; II, remotely controlling an unmanned aerial vehicle to fly according to a set flight line, and collecting a remote sensing image; III, laying out a plurality of quantity control points according to the range and geological characteristics of the research area, and measuring these points one by one; IV, using professional remote-sensing image processing software to generate a point cloud, and exporting surface three-dimensional coordinates of the research area; V, according to the ground control measurement results, using a four-parameter surface fitting correction model to the three-dimensional coordinates measured by the unmanned aerial vehicle; VI, comparing the corrected surface elevation with pre-mining tomographic map elevation, and calculating post-mining surface settlement. The method has the advantages that the steps are simple, the design is reasonable; implementation is convenient, calculating precision is high, and the surface settlement due to coal mining can be calculated effectively.

Method for monitoring and calculating settlement of coal mining surface based on unmanned aerial vehicle remote sensing

The invention discloses a mudslide disaster situation assessment method and application. The mudslide disaster situation assessment method comprises the steps of performing extraction and analysis of a mudslide accumulation area depositing thickness and particle size information of large-particle stones based on aerial photography data of an unmanned aerial vehicle, applying the data to the analysis of the material power process along the way, inverting mudslide dynamic parameters along the way, and performing quantitative analysis on the damage degree of a post-disaster mudslide accumulation area along the way, so as to achieve quick assessment of the disaster situation. The method can perform dynamics inversion on the whole spatial rang of a specific measurement area based on outdoor actual condition measurement data, perform regional quantitative analysis on the damage degree of the post-disaster mudslide accumulation area along the way, and serve post-disaster rescue and post-disaster reconstruction design.

Mudslide disaster situation assessment method and application

The invention discloses a reservoir bank deformation monitoring method based on space-sky-ground integrated observation. The monitoring method comprises the steps of: firstly, carrying out large-rangedeformation monitoring early warning on reservoir bank slopes by utilizing a satellite borne InSAR (Interferometric Synthetic Aperture Radar), and acquiring reservoir bank slopes which need to be subjected to enhanced monitoring with emphasis; then carrying out observation on slopes in a small range by utilizing an unmanned aerial vehicle borne InSAR; then carrying out emphasis monitoring on early warning slopes by utilizing a shipborne/foundation SAR, and acquiring early warning information of the emphasis monitored reservoir bank slopes; and finally, respectively sending the early warning information to the administrative department by an application. Finally, a space-sky-ground multi-level key technology for water conservancy and hydropower reservoir bank deformation monitoring is implemented. By the technology, a deformation case of the reservoir bank slopes can be observed in a large space scale in a long period, and meanwhile, accuracy of emphasis slope observation is improved.

Reservoir bank deformation monitoring method based on space-sky-ground integrated observation

The invention discloses a post-disaster life tracking unmanned aerial vehicle system. The post-disaster life tracking unmanned aerial vehicle system comprises an unmanned aerial vehicle system body, a control station system and a communication link system. The unmanned aerial vehicle system body comprises at least one unmanned aerial vehicle which obtains the position of the unmanned aerial vehicle in real time through a navigational satellite and flies in the sky above a post-disaster search-rescue region to collect an image, the spectrum and infrared rays of the ground in real time. In addition, the position, the image, the spectrum and the infrared rays are sent to a control station after being integrated, classified and analyzed. The control station system comprises at least one control station which is used for recognizing a vital sign signal according to the image, the spectrum and the infrared rays collected through the unmanned aerial vehicle and drawing a map presenting a life position in combination with the position. The communication link system is used for providing communication links between the unmanned aerial vehicle and the navigational satellite, between the unmanned aerial vehicle and the control station, and between the control station and a disaster relief command center. The post-disaster life tracking unmanned aerial vehicle system can overcome the influence of severe environment and collect data continuously, and has the advantages of being high in search-rescue efficiency and accurate in life locating.

Post-disaster life tracking unmanned aerial vehicle system

The invention discloses a method for post-disaster damage assessment of buildings by using unmanned aerial vehicles, and relates to the field of disaster assessment. Multiple unmanned aerial vehicles(UAVs) are used to shoot the images of the disaster area, and then TIFF format remote sensing images of the disaster area are quickly constructed on a GPU server by using the photographed high-definition images transmitted from the UAVs. the neural network image segmentation model is used to extract the intact houses from the remote sensing images and compare them with the remote sensing images before the disaster, the block is taken as the unit to record the damaged data and corresponding GPS coordinates, and the geographic coordinates polar spherical projection is used to draw the distribution map of the damaged houses on the map of the disaster area. The invention can quickly evaluate the disaster situation, and the detection result has high credibility.

A method for post-disaster damage assessment of buildings by using unmanned aerial vehicles

Provided is an earthquake disaster rescue command and dispatch system and a method thereof; the system consists of a command center subsystem, a remote sensing satellite subsystem, an unmanned plane subsystem, a police population information subsystem, a weather information subsystem, a medical information subsystem, a relief goods repertory subsystem and input/output interfaces; by analyzing disaster information and disaster rescue information collected by each aforementioned system, a hierarchical model of earthquake disaster rescue can be built by an analytic hierarchy process; meanwhile, based on the actual situations of former earthquake disaster rescue, respective disaster rescue plan and analytic hierarchy process disaster rescue parameter database can be built. When an actual earthquake disaster happens, the current disaster situations are analyzed by the analytic hierarchy process, and the disaster rescue plan is quickly determined. The designed system and method herein are more applicable to collecting relative information quickly as soon as the earthquake happens, and automatically selecting the rescue plan for the command dispatch of the disaster rescue.

Earthquake disaster rescue command and dispatch system and method

Provided is an earthquake disaster damage degree evaluation method based on unmanned aerial vehicle aerial photos. An unmanned aerial vehicle is adopted to carry out hovering and image collection over an earthquake disaster area, earthquake disaster area image area-of-interest marking and selecting are respectively carried out on seven kinds of typical surface features, namely, houses, roads, bridges, dams, mountains, riverways and vegetation, according to an artificial interactive method, the gray level co-occurrence matrix textural features, the Tamura textural features, the Gabor ripplet textural features and the straight line and circle features of the selected area are selectively calculated, and finally the earthquake disaster surface feature damage degree is evaluated through a support vector machine classifier. The method is suitable for carrying out early information collection and evaluation in the happening area of earthquakes and secondary disasters caused by the earthquakes.

Earthquake disaster damage degree evaluation method based on unmanned aerial vehicle aerial photos

The invention discloses a temperature control device and method for a high power device for space. The device comprises a direct-current power supply, a temperature sensor, the high power device, a TEC, a thermal insulation shell, a thermal capacity structural component, a temperature sensor data acquisition device, a temperature controller and a heat tube. The method includes the steps that before the high power device starts to work, the temperature of the working device in the thermal insulation shell is adjusted to the minimum value T0 of the normal working temperature through the TEC, during the working time t of the high power device, heat generated by the high power device is stored through the thermal capacity device, and the temperature of the high power device is made to be smaller than TMAX when work is finished. Through the temperature control device and method, the working temperature of the high power device can be accurately controlled at low cost easily, conveniently and effectively.

Temperature control device and method of high power device for space

The invention provides a frequency spectrum beam combining device for the frequency selection of an optical fiber grating. The device comprises at least two optical fiber lasers with different wave length, a collimator, beam direction adjusters and a body grating, wherein each optical fiber laser comprises a first pumping source, a high-reflective optical fiber grating, a first active optical fiber and an output coupling optical fiber grating which are arranged in order, and the collimator is used for collimating lasers output from the corresponding optical fiber lasers; the beam direction adjusters are used for adjusting the directions of the lasers which re collimated by the collimator, so that the lasers can enter the body grating in an incident manner at the preset incident angle; the body grating is used for combining the beams which are from all the beam direction adjusters, are incident at different incident angles and have different wave lengths into one beam. The frequency spectrum beam combining device for the frequency selection of the fiber grating omits the traditional complicated arrangement that the specific laser wave length can be sent by the tunable semiconductor laser and is amplified in a multi-stage manner, so that high power is realized, and a high-power and narrow-line-width laser device can be directly generated by a fiber laser oscillation stage.

Frequency spectrum beam combining device for frequency selection of fiber grating

The invention discloses an external type rotation control device of a theodolite with two degrees of freedom. The control device consists of a pitching direction control component and a yawing direction control component, wherein the pitching direction control component comprises a first movement driving mechanism, external type clamping pieces and a first connecting structural member (108), a first external type clamping piece is connected with a theodolite body connecting structural member (104a), and a second external type clamping piece is connected with a theodolite body connecting structural member (104b); the yawing direction control component comprises a second movement driving mechanism and a second connecting structural member (304); by virtue of a manner that the first movement driving mechanism drives the external type clamping pieces to rotate, the control in the pitching direction of the theodolite with two degrees of freedom is realized; and the second movement driving mechanism drives a horizontal circle (205) of the theodolite to rotate, so that a telescope tube (200) is driven to move in the yawing direction, thereby effectively improving the automation level of the operation of an old instrument.

External type rotation control device of theodolite with two degrees of freedom

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