Three-dimensional coordinate reference field indoor space measurement positioning scanning smooth surface calibration method

Abstract

The invention belongs to large-size measuring technology, aims to acquire scanning light face structure parameters fitted with its actual shape and can improve measuring accuracy of a wMPS system. A three-dimensional coordinate reference field indoor space measuring, positioning and scanning light face calibration method includes: using a laser tracker to measure global control points under multiple stations, and cooperating with a weighting algorithm for optimizing measuring angle errors to acquire a three-dimensional coordinate reference field; taking coordinate field reference as referencefor wMPS scanning light face calibration of an indoor space measuring and positioning system; arranging an emitting station, and measuring and recording moment of each scanning light source when passing each control point; taking a quadric surface as a typical model with scanning light face more fitted with actual shape, establishing a constraint equation through coordinates of the control pointsin reference field space, combining with other constraints, using a least square method to resolve parameters of the scanning light face, and taking the parameters as intrinsic parameters of a wMPS single emitting station for reconfiguration. The method is mainly applied in large-size measuring occasions.

Description

Technical field [0001] The invention belongs to a method for calibrating internal parameters of a large-size measurement system in an industrial field, and particularly relates to a method for calibrating a scanning light surface model parameter of an indoor space measurement positioning system based on a three-dimensional coordinate reference field. Background technique [0002] Indoor space measurement positioning system, typical representative is wMPS (workshop Measurement Positioning system). It is a multi-station distributed large space measurement positioning system developed based on the principle of spatial angle intersection for the measurement needs of large equipment manufacturing industry. It has a wide measurement range, The advantages of high measurement accuracy and multi-task parallel measurement. The measurement system is mainly composed of four parts: multiple transmitter stations deployed in the measurement space, a spherical receiver placed at the measured poi...

AI Technical Summary

Problems solved by technology

Since the wMPS positioning system uses the intersection of spatial angles under the constraints of the scanning optical surface for three-dimensional coordinate measurement, the degree of fit between the model of the scanning optical surface and the actual shape of the scanning optical surface directly affects the angle measurement performance of a single transmitting station, thereby affecting the entire system measurement accuracy

At this stage, using the ideal plane that deviates from the actual situation as the model of the scanning light surface will cause a certain amount of systematic error in the measurement model of a single transmitting station, thus affecting the coordinate measurement accuracy in the network of multiple transmitting stations

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