3 results about "Measurement station" patented technology

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 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 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.