11 results about "Measurement station" patented technology

A system and method of drilling a wellbore to a target may include measuring attitudes at two adjacent survey stations along a wellbore using a downhole surveying tool. An actual change in wellbore position over a survey leg linking the two survey stations may be determined. Corrections may be applied to the measured attitude at one or both of the survey stations such that an estimated well path joining the survey stations indicates the determined actual change in wellbore position between the two survey stations.

The application discloses a kind of measurement methods of tunnel initial support post-settlement observation, specifically related to tunnel construction measurement technical field, the application installs round prism in the two sides of the second lining of the tunnel of previous segment has been constructed end, and the accurate coordinates of all round prisms are calculated according to the known construction reference point coordinates of tunnel, when station is set, total station instrument calculates the installation coordinates of total station instrument in tunnel according to the known coordinates of round prism, to establish the measurement reference with the installation coordinates and as measurement station, install small prism when tunnel initial support construction, total station instrument is placed at the installation coordinates of total station instrument, total station instrument is aimed at the small prism on the tunnel initial support of next segment and carries out accurate measurement, obtains its elevation variation related data, the accuracy of key parameters such as cumulative settlement, interim settlement and settlement rate can be effectively guaranteed by the method, not only realizes reliable tracking to settlement trend, also guarantees the continuity and comparability of data, to accurately reflect the settlement deformation law after tunnel initial support.

The present invention discloses a device and method for non-contact measurement of rock formation dip, which belongs to the technical field of rock formation dip measurement. The device and method include a rotating base, a bracket mounted on the top of the rotating base, an ear shaft mounted in the middle of the bracket, the end of the ear shaft fixed to the center of the dial, a laser movably mounted on the ear shaft between the dial and the bracket, an elevation pointer connected to the laser outlet, and a compass fixedly mounted on the top of the bracket. The present invention adopts the above-mentioned device and method for non-contact measurement of rock formation dip, which does not require contact with the measured rock formation to measure rock formation dip, reduces measurement difficulty and personal risks, has few moving parts, no sophisticated optical components and electronic sensors, is low in cost, light in weight, small in size, easy to carry, sturdy and durable, simple to operate, suitable for field surveys, suitable for various terrains, flexible in measurement station layout, and has a wide range of applicable scenarios. It only involves angle measurement and does not require distance measurement, resulting in small errors and high precision.

The invention discloses a precise point positioning ambiguity fixing method based on a phase deviation precision factor, and belongs to the technical field of a global navigation satellite system, and the method comprises the steps: calculating the decimal cycle parts of ultra-wide lane ambiguity, wide lane ambiguity and narrow lane ambiguity based on a GNSS reference station phase observation value; sequentially selecting observation stations according to the number of observation satellites, calculating a receiver end UPD value and a satellite end UPD value through iteration by using a phase deviation whole network resolving method and decimal cycles of the ultra-wide lane ambiguity, the wide lane ambiguity and the narrow lane ambiguity, and extracting a residual vector of phase deviation; calculating a UPD precision factor according to the residual vector of the phase deviation; and updating the ambiguity variance-covariance matrix of the user side by using the UPD precision factor, and fixing the ambiguity of the user side based on an LAMBDA algorithm. According to the invention, the problem of inconsistency between the ambiguity and the precision of the ambiguity variance-covariance matrix in the prior art is solved.

The invention relates to the technical field of sensor networks, and particularly discloses a silo group construction data acquisition method and system based on a sensor network, and the method comprises the following steps: S1, obtaining a top view of a silo group, marking target silos, and installing a GNSS measurement station at the connection part of the target silos; s2, setting a receiving time period, acquiring position information of the GNSS measuring station at a starting point and an ending point of the receiving time period, recording the position information as first information and second information, calculating a first coordinate and a second coordinate, judging whether the silo is inclined or not, and calculating an offset rate when the silo is inclined; and S3, calculating the speed increase of the vertical shaft, and judging whether the acquired position information is correct or not according to constraint conditions. According to the method for collecting the construction data of the silo group, whether the silo group inclines or not during construction is judged, and the accuracy and safety during silo construction are improved.

The application provides a target ball roundness error measurement method and system based on the theodolite angle measurement principle, and comprises the following steps: setting a theodolite, directional lighting, aiming at a target ball contour point by using the theodolite, constructing a radius angle measurement model, linearizing the model, calculating the distance from a measurement station to the center of the target ball, and obtaining a target ball roundness error calibration result, etc. The theodolite aiming data is converted into a radius value based on a spherical triangle model, the non-contact roundness error measurement of the theodolite is realized for the first time, the center coordinates of the ball, the baseline length and the roundness error calibration can be synchronously completed in combination with the space three-dimensional intersection measurement, and the integrated efficient calibration of the three-dimensional baseline standard device "center coordinates of the ball-space baseline length-roundness error" can be realized.

The application relates to the technical field of geotechnical mechanics testing, in particular to a non-contact measurement method for a circular tunnel surrounding rock structure surface and related equipment, establishes a measurement control point and a measurement station position, establishes a local measurement coordinate system, determines feature points of a structure surface trace and coordinates of the feature points, converts the local coordinates into global coordinates by correcting a hole axis azimuth angle, constructs a corrected local coordinate system, obtains new coordinates of the feature points, projects the new coordinates to a tunnel cross section, calculates a perpendicular distance from the feature points to a circumferential line, optimizes the feature points according to the perpendicular distance to meet constraint conditions, determines a structure surface trace distribution map and occurrence of the feature points, and realizes accurate measurement and analysis of the tunnel surrounding rock structure surface. The application can obtain actual circular tunnel surrounding rock structure surface trace and occurrence information by reducing field measurement workload.

The invention relates to the technical field of satellite navigation and positioning, and provides a regional troposphere model construction method and device, electronic equipment and a storage medium, and the method comprises the steps: carrying out the real-time calculation of troposphere delay values based on the original observation data of GNSS reference stations, and obtaining the troposphere delay value of each reference station; carrying out troposphere region division on the region based on the correlation between troposphere delay values of the reference stations in the region to obtain a plurality of subregions; based on the latitude and the height of any observation station in any partition, determining a troposphere vertical attenuation factor between any observation station in any partition and the base station; and constructing and broadcasting a real-time troposphere model of any partition based on the troposphere vertical attenuation factor and the troposphere delay value of the base station. According to the method, the device, the electronic equipment and the storage medium provided by the invention, more reasonable troposphere region division is realized, and the troposphere data broadcasting amount can be reduced to the maximum extent.

The application discloses a pre-assembly-free large steel truss section assembly multi-point real-time digital monitoring method and system, belongs to the technical field of bridge construction monitoring, solves the problem that the existing method cannot realize multi-point simultaneous measurement and cannot realize real-time feedback when the optical prism method is used for steel pipe section assembly positioning, and the method comprises the following steps: segment main pipe blanking scanning, segment main pipe line laying monitoring, segment main pipe assembly deviation rectification, and flange plate line laying fixing; the application provides a pre-assembly-free large steel truss section assembly multi-point real-time digital monitoring method, multiple visual measurements are adopted to avoid the visual line blockage of one-way measurement, and time waste caused by repeated conversion of measurement stations is avoided; the end centroid of the steel pipe can be accurately controlled, and uncertain errors caused by the measurement of a single waist line of the circular pipe are avoided; and a prior measurement recording method is adopted, only three mark points of the main pipe body are measured in the formal assembly stage, and the efficiency of line laying measurement is greatly improved.

The invention relates to the technical field of rock-soil mechanics testing, in particular to a circular tunnel surrounding rock structural plane non-contact measuring method and related equipment, and the method comprises the steps: determining a measurement control point and a measurement station position, building a local measurement coordinate system, determining feature points of a structural plane trace and coordinates thereof, and correcting a hole axis azimuth angle to obtain a non-contact measurement result. Converting the local coordinates into global coordinates, constructing a corrected local coordinate system, obtaining new coordinates of the feature points, projecting the new coordinates to the cross section of the tunnel, calculating the vertical distance from the feature points to the circumference, optimizing the feature points according to the vertical distance to meet constraint conditions, and determining a structural plane trace layout and occurrence of the feature points. And accurate measurement and analysis of the tunnel surrounding rock structural surface are realized. According to the method, the actual round tunnel surrounding rock structural plane trace map and occurrence information are obtained by reducing the field measurement workload.

A method of drilling a wellbore to a target includes measuring attitudes at two adjacent survey stations along a wellbore using a downhole surveying tool. An actual change in wellbore position over a survey leg linking the two survey stations is determined. Corrections are applied to the measured attitude at one or both of the survey stations such that a modeled well path joining the survey stations reflects the determined actual change in wellbore positon between the two survey stations.