248 results about "Survey line" patented technology

A method and apparatus is disclosed for performing a seismic survey below the surface of a body of water and on the seabed. In one embodiment, a plurality of seismic data receivers are removably loaded in a carrier located above the surface of the water and the carrier is lowered into the water and placed at a depth relatively close to the seabed. Each of the receivers has a memory for recording the vibrations of the seabed and has a switch for activating the memory. A ROV is used to unload the receivers from the carrier and to deposit each receiver on the seabed and along a survey line. In one embodiment, the receivers comprise a frame, a pressure vessel for housing the memory and remotely activated controls, and a geophone that is separately planted into the seabed at a relatively short distance from the frame.

The present invention is about an unmanned boat automatic survey device and an unmanned boat automatic surveying method that automatically generate survey routes and automatically survey underwater and water bottom conditions under the survey routes.Under the present invention, a reference survey line is entered for generating a survey route (S1), and a plurality of survey routes are generated by translating the reference survey line at a fixed distance (S2). It then determines the distances of the generated survey routes and instructs a traversing order of the determined survey routes (S3), and causes the unmanned boat to navigate automatically according to the instructed traversing order. It surveys at least underwater or water bottom condition during the navigation (S5), and display and store the surveyed underwater or water bottom condition (S6).

The invention discloses a method for positioning a constructed wetland blocked area on the basis of the two-dimensional resistivity imaging technology. The method includes the steps of firstly, conducting a two-dimensional apparent resistivity section survey through the high-intensity resistivity method and three-pole rectangular AMN and MNB devices by reasonably arranging survey lines and setting collection parameters on the premise of the resistivity difference between the blocked packing area and the non-blocked packing area and on the basis of collecting and analyzing existing constructed wetland resources; secondly, conducting two-dimensional inversion on the two three-pole apparent resistivity sections obtained through measurement, converting apparent resistivity data into resistivity data, drawing the contour map of the resistivity sections, and achieving constructed wetland two-dimensional resistivity imaging; thirdly, achieving the aim of positioning the constructed wetland blocked area according to the two-dimensional resistivity imaging characteristics and the resistivity difference analysis. The method is economical and easy to conduct and can fill in the technical gaps in the constructed wetland blocked area two-dimensional positioning, and the powerful technical guarantees are provided for continuous and efficient running of constructed wetlands.

This focus test mask is provided with a test pattern that is projected onto a wafer via a projection optical system. This test pattern includes: a plurality of line patterns that are lined up in a direction of measurement; phase shift sections that are provided in areas adjacent to each of the plurality of line patterns and that are used to shift the phase of light passing through; and reference patterns that are used to obtain an image that forms a reference when the shift in the line pattern image is measured. Spaces between the plurality of line patterns are set at a size that allows each line pattern to be regarded as equivalent to being isolated lines.

The invention relates to an existing railway survey method based on a total station. In the method, the total station and an electromagnetic wave reflection device are adopted to survey an existing railway. The survey method comprises the following steps: firstly arranging the electromagnetic wave reflection device at the center of the existing railway line to be surveyed by virtue of a traditional measuring square ruler; determining position of the total station, and surveying the line center by the electromagnetic wave reflection device to obtain distance (slant distance), horizontal angle and vertical angle of the surveyed line and 3D coordinates of survey points (X, Y and H) of the measured line (slope distance); and then analyzing and calculating the survey data by a PDA, and performing survey on line mileage, center line, traverse, elevation and other railway equipment. The existing railway survey method based on a total station reduces on-track operation times of operators, guarantees safety of surveyors, instruments and equipment, accuracy and reliability of the surveyed data, improves production efficiency of the existing railways, and alleviates labor intensity of the operators.

The invention relates to a global optimization method for surface wave dispersion and body wave spectral ratio joint inversion shallow velocity. The method comprises the following steps that (1), initial parameters of the inversion are given to construct an unknown vector population represented by binary coding; (2), theoretical calculation methods of a surface wave dispersion curve and a body wave HVSR curve are determined; (3), an object function simultaneously fitting the surface wave dispersion curve and the body wave HVSR curve is established; (4), global optimization calculation of genetic simulated annealing is conducted to obtain a globally optimal solution; and (5), the shallow velocity structure can be obtained based on the globally optimal solution. Advantages of genetic and simulated annealing methods are combined, efficiency and accuracy of the inversion can be improved, application in urban areas with the survey lines being difficult to unfold can be achieved, and application in background noise, seismic measuring or strong earthquake records and other data sources can be achieved.

Leveling operation can be effectively performed at a discharge site without increasing a cost of vehicles, and a running course can be easily generated in a short time and at a low-cost. Based on each of measured position data of a survey line 20 of a discharge site 21, a normal line Lc normal to the survey line 20 is obtained, a target discharge position 26′ is positioned at a prescribed distance away from the survey line 20 in an inward direction of the discharge site 21 based on the normal line Lc, and then data of a running course 27 in which a reference approach direction 31 to approach the target discharge position 26′ is a direction normal to the survey line 20 are generated.

The invention discloses an unmanned aerial vehicle semi-aviation time domain electromagnetic detection data analysis and interpretation method, and belongs to the technical field of geophysical aviation electromagnetic exploration. The method comprises the following steps of a, preprocessing survey line data to eliminate a motion noise; b, performing spectral analysis and digital filtering processing on secondary field data; c, forming data to be imaged or inversely interpreted; and d, performing one-dimensional rapid inversion on the superimposed and lane-drawn secondary field data, establishing an underground electrical structure profile, and performing geological interpretation on an inversion imaging result in combination with geological data to form a comprehensive interpretation result. On the basis of ground grounding long wire source emission, an aerial unmanned aerial vehicle receives semi-aviation time domain electromagnetic detection data of an observation mode, and the method can quickly complete processing, analysis and explanation work while guaranteeing higher detection precision, and can realize quick exploration in a smaller area range.

The invention discloses a leakage detection method and device for a vertical plastic-laying anti-leakage curtain. The leakage detection device comprises the vertical plastic-laying anti-leakage curtain, an accumulator, a plurality of electrodes, an electrode conversion box and direct current electrical prospecting apparatus. Two measuring lines are laid on the two sides of the anti-leakage curtaincorrespondingly; the electrode conversion box and the direct current electrical prospecting apparatus are arranged on the anti-leakage curtain and connected with the electrodes; and the multiple electrodes are embedded on the measuring lines sequentially with equal distances. The direct current electrical prospecting apparatus is controlled to emit currents to the underground according to the setsequence, so that potential differences are formed between the electrodes, accordingly, the current intensity and the potential differences are measured; and forward simulation is conducted accordingto the measuring results, and thus the resistivity profiles of the laid measuring lines can be obtained. The electrodes only need to be placed on the two sides of the anti-leakage curtain, therefore,construction is easy and convenient in actual engineering, detection can be conducted in the laying process of a vertical anti-leakage film, and thus hidden dangers can be treated more timely.

The invention relates to the marine surveying field, which is a systematical error testing and adjusting method of a marine surveying line net system. In the method, the first step is data acquisition, marine surveying line data which is obtained by a conventional measuring line method is transmitted in a computer by a data wire. In the second step, a computer data processing system performs the error detection of measured data of the marine surveying line net by a rank defect network adjustment principle: first, pictures are visualized and are edited, and a difference value of a junction is obtained, meanwhile, a difference value pie diagram of the junction is plotted, and the parameter results are obtained by the difference value circle analysis and the compensating computation. In the third step, tested testing data errors are adjusted, and systematic errors are corrected. The invention improves the precision of testing data of an entire region, avoids the resurvey and saves the measuring cost.

The invention relates to a geophysical surveying method, in particular to a directional lighting seismic signal synthetic method which is based on a single seismic source in the seismic prospecting. Equidistant shotpoints with the odd number of more than one to n are designed on a surveying line; at the same time, equidistant track space demodulator probes with the number of more than one to N are arranged on the surveying line; the single shot seismic data of the shotpoint 1 are obtained through a controlled seismic source, the single shot seismic data of the shotpoint 2 are obtained by moving the shotpoints, the single shot seismic data of the shotpoint 3 are obtained by moving the shotpoints, and then the single shot seismic data of the shotpoints with the number of n are obtained by analogy; the single shot seismic data are made linear superposition after being delayed, and are synthesized into the directional lighting seismic signals with directivity, which correspond to a positioning seismic wave field. By comparing the directional lighting seismic signal synthetic method which is based on a single epicenter with the phase control seismic signals, the noise-signal ratio of the signals is improved, the needed number of seismic sources is few, the working cost is low, the operation is simple, and the problem of the inconsistency of a plurality of shock devices is overcome.

The invention relates to an ultrasonic testing method for steel pipe void, which comprises the following steps of: confirming a tested fracture surface of each steel pipe and arranging a plurality of survey lines on the surface of each steel pipe in a uniform distribution way; knocking each survey line on each fracture surface of arch ribs by a small hammer, preliminarily judging the compaction rate of concretes inside the steel pipe according to the knock, and recording judging results; measuring diameters of the survey lines on each fracture surface by using a tooling scale and recording; coating a coupling agent on the surface of each steel pipe, detecting each survey line by using an ultrasonic detector, and recording parameters of sound time, sound velocity, amplitude and wave form which are displayed in the detector; analyzing and calculating the recorded multi-group data to obtain the uniformity state of the concretes inside the steel pipes; if the uniformity state is favorable, then carrying out a quantitative calculation on inner pipe defects, and working out an inner pipe defect value of each fracture surface through a sound time value detected by the ultrasonic detector; and if the uniformity state is unfavorable, then obtaining a detection conclusion.

The invention discloses a grounding grid broken point diagnosis method and a transient electromagnetic detection device. The method comprises the following steps: setting a testing survey line above a grounding grid to be diagnosed; establishing a plurality of measurement point coordinates along the testing survey line; carrying out point-to-point measurement by the transient electromagnetic detection device along the measurement point coordinates of the testing survey line, so as to obtain induced voltage data of the measurement point coordinates; calculating according to the induced voltage data to obtain a magnetic field intensity value along the vertical direction and establishing a three-dimensional magnetic field intensity contour map of a testing region; and analyzing the three-dimensional magnetic field intensity contour map and judging whether the grounding grid has broken points or not. The diagnosis method disclosed by the invention does not depend on a grounding grid design construction drawing and a transformer substation does not need to be powered off; and grounding grid broken point diagnosis can be realized without excavation and power outage and the economic loss of a diagnosis process is reduced.

The invention relates to a radar detection method for the occurrence of a geological structure surface. The technical problem to be solved is to provide a method for enhancing the advanced geological forecast of a ground penetrating radar or the detection correctness and accuracy of a geological radar and avoid large error caused by visual direction or virtual inclination. The technical scheme for solving the problem comprises the following steps of: arranging at least two radar survey lines for a detection target structure surface; testing along the survey lines by using the ground penetrating radar; analyzing and processing data acquired by testing and performing time depth conversion so as to form a radar image; finding out each radar reflected wave event of the same geological structure surface; resolving an equation of the structure surface according to the directions of the survey lines, distance and a reflecting interface depth detected by each residual distance test point; and determining the spatial position of the structure surface according to the true occurrence of the structure surface. The method can be applied to the advanced geological forecast and geological detection of tunnels.

The present invention provides a method for detecting a tunnel bottom base multi-layer karst cave. According to the method, firstly a geological analysis method is used to analyze geomorphology, and with foundation excavation, an infrared ray temperature detection method and a geological drilling detection method are used to determine the natures of strata rocks and lithologic distribution and aninterface; the subsequent geological radar detection and positions of survey lines and survey points of an acoustic reflection method; after the completion of the above foundation trench excavation, the survey lines and survey points are demarcated, and a geological radar detection method is used to carry out linear scan of the geological radar; and finally a sound wave reflection method test is carried out. The detection method provided by the invention is a reasonable and effective combination of multiple detection methods, the combination of qualitative judgment and quantitative judgment isadopted, and a condition that a large number of field implementation processes occupies the effective time of construction is reduced. Used radar detection equipment is highly practical and is easy and convenient to operate.

The invention discloses a method for detecting a target vertex in a ground penetrating radar recording profile. The method comprises steps of: firstly, calculating the one-dimensional energy curve of the preprocessed ground penetrating radar recording profile along a survey line dimension and determining a preset range of the number of the target vertexes according to the number of local maximum points of the curve; then subjecting the preprocessed ground penetrating radar recording profile to edge detection by using an automatic threshold matching way to obtain a binary image and estimating a vertex in the binary image until the preset range of the pre-estimated number of the target vertexes; then, creating a matching template based on the coordinate positions of the vertexes, performing template matching by using the template and the binary image obtained by the edge detection, calculating matching similarity, and discarding the vertexes with matching similarity lower than the threshold to obtain matched vertexes; and filtering the matched vertexes based on a clustering analysis method to remove false vertexes and obtain the detection result of the target vertex. Compared with the prior art, the method has higher detection accuracy in case of a low signal-to-noise ratio.

The invention discloses a submarine cable secondary positioning method in geophysical exploration, which comprises the steps of: fixing a transponder on a submarine cable to be tested, installing an underwater acoustic transducer on a survey vessel, installing two transducers in the underwater acoustic transducer, wherein the two transducers form an ultrashort baseline array, wherein one transducer is used as a receiving and transmitting combined transducer and the other one is only used as a receiving transducer; sending a call signal by one transducer, recognizing the call signal and sending a response signal by the transponder, receiving the response signal and processing and figuring out geodetic coordinates of the transponder to obtain a left position and a right position of the transponder in the survey vessel, and determining an accurate position of the transponder and the final geodetic coordinates. The invention overcomes the problem on positioning a mirror image with the long baseline, improves the positioning accuracy and the positioning reliability, realizes the randomness of a positioning ship sailing at two sides of a survey line, is convenient for marine positioning construction, increases the construction efficiency by one time and has a positioning accuracy superior to 1m.

The disclosure provides a three-dimensional imaging method and system of a landslide body. The three-dimensional imaging method of the landslide body comprises the following steps of: using a semi-aeronautical transient electromagnetic method to detect the landslide body to obtain a rough depth and a rough distribution range of the landslide body; dividing the rough depth of the landslide body into a number of step depths within the rough distribution range of the landslide body, using different survey lines at different step depths, performing transient electromagnetic point and high-densityelectrical method point arrangements separately along the survey lines, and using the transient electromagnetic method and a high-density resistivity method correspondingly to obtain a first resistivity value data set and a second resistivity value data set; screening out the resistivity value data corresponding to geological bodies exceeding the depth of 1 / 4 of the survey line length and the geological bodies not exceeding the depth of 1 / 4 the survey line length separately from the first resistivity value data set and the second resistivity value data set to perform imaging analysis and perform fusing to generate a two-dimensional resistivity image; and performing three-dimensional slice result show on the obtained two-dimensional image, so as to provide accurate data information for thetreatment of the landslide body.

The present invention relates to a registering device for registering a location along a measuring line, at which location a temperature change takes place. In an advantageous way, according to one exemplary embodiment of the present invention, by means of the FMCW method a location on the measuring line is determined, at which location a temperature increase exceeds a predefined threshold value. The location is determined on the basis of a signal which is registered by the measuring line in response to a fed-in frequency modulated signal from evaluation electronics. Advantageously, in this way a simple and lightweight overheating warning system is provided, for example for hot-air supply pipes in aircraft.

The invention relates to an airborne-gravity least-square downward-continuation analysis algorithm based on upward continuation. The main technical characteristics of the algorithm include: establishing analysis relationships of airborne-gravity upward-continuation and downward-continuation and vertical partial derivatives of each order of gravity anomalies on survey line heights according to a Taylor series expansion model; and upwardly continuing airborne-gravity data through a Poisson integral formula to obtain a gravity anomaly value on each height, calculating the vertical partial derivatives of each order of the gravity anomalies on the survey line heights on the basis of a least-square theory, and substituting the vertical partial derivatives of each order into a Taylor series expansion formula to realize stable calculation of downward continuation. According to the algorithm, an airborne-gravity downward-continuation calculation process is converted into two steps of upward-continuation calculation and vertical-partial-derivative calculation, interference of data observation noises on a calculation result is effectively suppressed through processing of the first step, stable calculation of the inverse problem of downward continuation is successfully realized through processing of the second step, and the inherent ill-posed-nature problem of downward-continuation calculation is better solved.

The invention discloses an aeromagnetic data leveling method, which comprises the steps of carrying out overall average empirical mode decomposition on aeromagnetic data along a survey line direction and a survey line crossing direction successively so as to acquire a plurality of sub data blocks, then finding an interference sub data block in the plurality of sub data blocks and removing the interference sub data block, and adding the rest of the sub data blocks so as to acquire leveled aeromagnetic data. According to the method, a leveling error is found through visual operations, auxiliary data is not required in the whole process, and the data can be decomposed, screened and mapped automatically, thereby solving a problem that an existing leveling method and software are generally multiple in parameter and difficult to control and need people possessing geophysical knowledge and leveling experience to operate.

The present invention is about an unmanned boat automatic survey device and an unmanned boat automatic surveying method that automatically generate survey routes and automatically survey underwater and water bottom conditions under the survey routes. Under the present invention, a reference survey line is entered for generating a survey route (S1), and a plurality of survey routes are generated by translating the reference survey line at a fixed distance (S2). It then determines the distances of the generated survey routes and instructs a traversing order of the determined survey routes (S3), and causes the unmanned boat to navigate automatically according to the instructed traversing order. It surveys at least underwater or water bottom condition during the navigation (S5), and display and store the surveyed underwater or water bottom condition (S6).

The invention discloses a BIM-based geotechnical engineering comprehensive investigation information interpretation method, which realizes three-dimensional interpretation of comprehensive investigation results based on a BIM technology and performs three-dimensional visual integration on the investigation results. According to the technical scheme, the method comprises the steps of establishing aunified project database, and storing data; calling in terrain CAD data; carrying out automatic interpretation on the data to obtain interpretation information; carrying out three-dimensional interpretation on the field geological survey data; performing three-dimensional interpretation according to the high-density electrical survey lines, and establishing interval stratum segmented three-dimensional interpretation multi-line segments; setting a reflection coefficient value according to a seismic wave method, and establishing an inversion three-dimensional contour surface; reading drilling data, and establishing a three-dimensional drilling model according to stratum attributes; establishing an investigation result comprehensive model according to the interpretation information, and carrying out weight assignment and three-dimensional geological curved surface interpolation fitting; and establishing a geologic body according to the topographic surface, and performing Boolean operation on the geologic curved surface to obtain a layered and blocked geologic body.

The invention relates to an optimum design method of a seismic survey line by utilizing remote sensing information for arranging and determining an optimum position according to a survey line theory at an early stage of seismic construction. The method comprises the following steps of: firstly, acquiring remote sensing images, and fusing the remote sensing images by utilizing a field actual measurement control point; acquiring more than one selectable survey line according to mobile limiting conditions and seismic acquisition parameters; generating an evaluation point set according to integral track pitches to obtain various evaluation factor index values; normalizing the evaluation factor index values; calculating the goodness of the integral survey lines in a weighting way; sequencing; and selecting a straight survey line with maximal goodness for construction. The invention can meet the requirements for selecting a better survey line position under the condition of detecting an underground target, overcome the defect of limitation on the arrangement and the regulation of seismic survey lines in complex surficial seismic engineering, enhance the implementation of the survey lines, improve the exciting and receiving conditions and increase the signal to noise ratio.

The invention relates to an integrated detection radar system for ice and water conditions. The system comprises a VHF (very high frequency) and UHF (ultrahigh frequency) combined antenna, wherein the combined antenna is connected with a VHF transmitting and receiving device and a UHF transmitting and receiving device; the VHF transmitting and receiving device and the UHF transmitting and receiving device are connected with a control device; the control device is connected with a main unit through a data transmission device; the main unit is connected with a satellite positioning device through a connecting device. The integrated detection radar system adopts double-frequency design to measure the thickness of an ice layer and the depth of water below a survey line rapidly and continuously and can measure the ice layer and the depth of the water below the ice layer rapidly, precisely and efficiently, original manual measurement is replaced with a detection radar, the measurement efficiency is increased greatly, a measurement value of a measured point can be obtained in real time, continuous measurement results are obtained and provided for a measurer in numerical value and voice manners, better measurement results and measurement experience are obtained, and the problems of the need for manual hole punching, few sampling points and the like for hydrologic observation in winter are solved.

A method for planning a path of a working device includes: generating a polygon corresponding to a work area of the working device and generating an edge data structure based on the polygon; generating a survey area based on the polygon; generating a plurality of survey lines at a predetermined interval in the survey area; detecting at least one intersection between each of edges of the polygon and each of the plurality of survey lines based on the edge data structure; and generating the path of the working device in the work area based on the at least one intersection.

The invention relates to a method for extracting center-line airborne geophysical prospecting data extraction method of a curved railway tunnel. On the basis of area-based aerial measurement on curvedrailway tunnel sections one by one, inversion is performed to obtain airborne geophysical prospecting inversion data of each survey line; meshed interpolation calculation is performed on the inversion data to obtain three-dimensional voxel data of the curved railway tunnel; equal-interval interpolation or equal-interval segmentation is performed on the center line of the tunnel to obtain a plurality of tunnel center-line coordinate points; on the basis of the airborne geophysical prospecting data, altitude elevation data of each tunnel center line coordinate point are extracted; depth assignment is carried out on the all tunnel center line coordinate points; a tunnel center line altitude coordinate system is generated by using landform altitude data of the corresponding coordinate points;and then airborne geophysical prospecting data information of the tunnel center lines are extracted from the tunnel three-dimensional voxel data to obtain a tunnel center line airborne geophysical prospecting cross-section diagram. Therefore, tunnel center line airborne geophysical prospecting data information can be obtained rapidly and accurately, so that an accurate analysis result is obtained.

The invention discloses a method for efficiently extracting an attenuation quality factor in a complex reservoir, comprising the following steps of S1, reading the seismic record data of a survey lineand determining a target stratum; S2, transforming, by using generalized S transform, each seismic record on the survey line from the time domain into the time-frequency domain to obtain a time-frequency map; S3, determining the attenuation estimated frequency band of the target stratum; S4, calculating the centroid frequency of a spectrogram in a selected frequency band at each time depth basedon the time-frequency map; S5, estimating the Q value sequence of the target stratum by an improved centroid frequency shift method; and S6, processing the Q value sequence by a stratum stripping method; and S7, drawing an output Q value profile map. The method utilizes the generalized S transform and the improved centroid frequency shift method to improve the accuracy and stability of the Q valueestimation.