Main beam deflection monitoring device based on binocular vision and monitoring method thereof

Abstract

The invention discloses a main beam deflection monitoring device based on binocular vision, which comprises at least two cameras and a target, the target is fixedly connected with any main beam of a crane, the target comprises two positioning patterns, the mass center of one positioning pattern is located between the top surface and the bottom surface of the main beam, and the mass center of the other positioning pattern is located between the top surface and the bottom surface of the main beam. The shooting directions of the two cameras face the target, and the two cameras are electrically connected with a controller of the monitoring device, so that the three-dimensional change of the mass center of each positioning graph is monitored. According to the main beam deflection monitoring device based on binocular vision and the monitoring method thereof, a binocular vision system is adopted to calculate the real-time mass center positions of two positioning graphs of a target located on a main beam, the real-time mass center positions are compared with the initial mass center positions of the two positioning graphs, and deformation of the central axis of the main beam is calculated according to changes of the mass center positions; therefore, the deflection value of the main beam is calculated according to the deformation of the main beam of the crane, and the deformation of the main beam of the crane is monitored in real time.

Description

technical field [0001] The invention relates to the technical field of cranes, in particular to a binocular vision-based main girder deflection monitoring device and a monitoring method thereof. Background technique [0002] In order to ensure the safe use of the crane, the deflection of the main girder of the crane needs to be detected during the use of the crane to ensure that the deflection is within a safe range. The traditional method uses methods such as wire drawing measurement method, theodolite method, level method, and connector method to measure manually. Not only time-consuming and labor-intensive but also affected by human factors. For this reason, two improvement schemes have been proposed in the prior art. One is to use the image visual sensing method to regularly detect the deflection of the main girder. One method is to use a laser range finder to detect the change of the distance between the main beam and the ground. The disadvantage is that it can only de...

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Problems solved by technology

[0002] In order to ensure the safe use of the crane, the deflection of the main girder of the crane needs to be detected during the use of the crane to ensure that the deflection is within a safe range. The traditional method uses methods such as wire drawing measurement method, theodolite method, level method, and connector method to measure manually. Not only time-consuming and labor-intensive but also affected by human factors

For this reason, two improvement schemes have been proposed in the prior art. One is to use the image visual sensing method to regularly detect the deflection of the main girder. One method is to use a laser range finder to detect the change of the distance between the main beam and the ground. The disadvantage is that it can only detect the deflection change under ideal conditions. In the actual working process, the main beam of the crane is bent downward, Inward bending will also occur, and this method cannot detect this change. Therefore, it is necessary to propose a monitoring method that can detect the vertical and horizontal bending degree of the main beam in real time

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