Slipway unified reference establishing method and device

Abstract

The invention provides a slipway unified reference establishing method and device. The slipway unified reference device used for various working conditions and spaces of shipway stage construction inthe technical field of shipbuilding is divided into three types including an A-type device, a B-type device and a C-type device. According to the invention, a slipway unified reference device is adopted, so that multiple measurement transfer errors caused by too far measurement are eliminated; a good foundation is laid for establishing a high-precision temporary reference under the shielding condition, and multiple measurement transfer errors caused by shielding are eliminated. According to the invention, the established slipway unified reference can effectively eliminate accumulated errors ofa digital measurement system caused by station transfer, the application range of the measurement system is widened, the system does not need to be modified, the device is simple, convenient and practical, installation and operation are easy, the measurement precision of various advanced digital measurement systems can be effectively improved, a powerful guarantee is provided for high-precision measurement and construction of ships, and the slipway unified reference establishing method and device have wide market prospects and are suitable for eliminating the transfer errors.

Description

technical field [0001] The invention proposes a measurement accuracy control method in the field of shipbuilding, which is mainly applied to reducing the cumulative error of a transfer station during the digital measurement of a ship's berth. Specifically, it is a method and device for establishing a uniform datum of a berth. Background technique [0002] Digital measurement technology is an important part of modern ship digital manufacturing technology. It uses various digital measurement equipment as implementation tools, and utilizes the high-precision measurement, control and analysis capabilities of the digital measurement system to implement fast, accurate and automated measurement of the object to be measured. Accurate shape size or spatial location information. Common digital measurement systems include electronic theodolite, total station, tracker, photogrammetry system, etc. However, the measurement accuracy of the digital measurement system is limited by the mea...

AI Technical Summary

Problems solved by technology

[0003] The cumulative measurement error caused by the transfer station will continue to accumulate with the increase in the number of transfer stations, which seriously affects the measurement accuracy of the advanced measurement system

There are two main reasons for the transfer of various measurement systems: First, when the measurement range is too large, the object to be measured is very large, the laser measuring instrument will diverge with the increase of the distance, and the measurement accuracy will gradually decrease with the increase of the distance. As a result, the single measurement cannot be completed, and it is necessary to continue the measurement at the transfer station; the second is that the local points to be measured of the measurement object are blocked, and the position of the initial measurement will block the optical path of the subsequent points to be measured. When the subsequent measurement cannot be completed, it is necessary to continue the transfer station measurement

When the advanced digital measurement system is applied to the shipbuilding field, due to the long size of the ship and the complex structure and line shape, the on-site construction measurement process often requires a transfer station due to the large measurement range and occlusion problems. The transfer station error seriously affects the measurement accuracy. How to eliminate this problem? It has become an urgent problem to improve the measurement accuracy of some errors and improve the quality and efficiency of shipbuilding

[0004] Patent application number 201710091958.X, application publication number CN106878947A proposes an indoor positioning method and device; patent application number 201810065179.7, application publication number CN108267089A proposes a reference network for measuring large ring-shaped objects using a laser tracker; patent application number 201510229560.9, application Publication number CN105163382A proposes an indoor area positioning optimization method and system; patent application number 201410433361.5, authorized announcement number CN104180822B proposes a method for checking the stability of deformation monitoring reference points, although some new measurement methods and coordinate calculation methods are proposed , but neither described the elimination of the error that may be caused by the transfer station in its method, nor did it describe the specific form and arrangement of the device for eliminating the error

Images