Honeycomb board online detection system and detection method

Abstract

The invention discloses an on-line detecting system for a honeycomb plate. The on-line detecting system is characterized by comprising a three-coordinate measuring instrument with an articulated arm, an image collection module used for collecting honeycomb plate surface images, and a control module. The image collection module is installed on the articulated arm of the three-coordinate measuring instrument, the three-coordinate measuring instrument drives the articulated arm to move under the control of the control module, and the image collection module collects the honeycomb plate surface images at different positions according to movement of the articulated arm of the three-coordinate measuring instrument. The control module comprises an image processing sub-module, a three-dimensional reconstruction sub-module and a deformation detecting sub-module, wherein the image processing sub-module is used for conducting image processing on the honeycomb plate surface images collected by the image collection module, identifying coded mark points of the upper honeycomb plate and detecting the oval centers of the honeycomb plate surface images, the three-dimensional reconstruction sub-module is used for conducting three-dimensional reconstruction on the honeycomb plate according to processing results of the image processing sub-module and obtaining the accurate three-dimensional coordinates of the coded mark points, and the deformation detecting sub-module is used for obtaining deviation data between the honeycomb plate to be detected and a preset model according to the preset module of the honeycomb plate and accurate three-dimensional coordinate data of the coded mark points of the three-dimensionally reconstructed honeycomb plate.

Description

technical field [0001] The invention belongs to the technical field of detection based on image recognition technology, and in particular relates to an online detection system and a detection method for a honeycomb board. Background technique [0002] With the continuous improvement of construction technology, new materials and new processes have been widely used, and honeycomb core technology is one of them. The honeycomb panel is a light-weight, bidirectionally stressed cavity member (such as figure 1 ), is a composite board composed of two thinner upper and lower panels firmly bonded on both sides of a thicker honeycomb core material (in the middle of the two panels). Because of its large strength-to-weight ratio, average force, strong pressure resistance (destructive force is 720kg per square meter), low thermal conductivity, good shock resistance, no deformation, light weight, and sound insulation effect, it is widely used in buildings. Only the decoration of curtain ...

AI Technical Summary

Problems solved by technology

Among them, the measurement accuracy of the total station is low, and the increase in the number of measurement points will greatly increase the workload of the measurement, which is not easy to realize

[0006] There are the following disadvantages in the measurement of the three-coordinate measuring machine: one is that it belongs to the contact measurement method, it is not easy to align the feature points, it has high requirements for the measurement environment, it is not portable, and the measurement range is small; the other is that the giant three-coordinate machine is extremely expensive and the measurement range Restricted, the cost of measuring equipment above 4m exceeds 4 million yuan, and there must be a good station. The environmental conditions are high, and the adjustment of blade placement is difficult. It takes time to establish the detection coordinate system and measurement programming in the early stage, which cannot meet the requirements. Efficiency Requirements for Manufacture and Inspection of Water Turbine Blades

[0007] The theodolite measurement system generally adopts manual aiming at the target and measuring point by point, the measurement speed is slow, the degree of automation is not high, the operation is complicated, and the requirements for operators are very high

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