Mining rock bolt is a basic component of roadway support in contemporary underground mining. It binds the surrounding rock of the roadway together and supports the surrounding rock itself. Mining rock bolts are not only used in mines, but also in engineering technology to actively reinforce slopes, tunnels, dams, etc. Mining rock bolts have a great effect. In order to ensure product quality and ensure safe use in underground mines, the quality of mining rock bolts must be strictly controlled. So how to detect the diameter and pitch of mining rock bolts?

Mining rock bolt steel bars have longitudinal ribs and horizontal ribs, and the rib height is also the detection standard for anchor steel. In order to carry out on-line inspection of their dimensions, most companies will use image analysis anchor steel calipers. Image analysis anchor steel caliper uses the image method to detect the specific size information of the mining rock bolt steel. Inside the caliper, multiple industrial cameras are installed for continuous and uninterrupted photos, and the image processing is performed by an independently developed system. So as to obtain the dimensional information of the measured anchor steel, and can also display images, and to achieve the monitoring of various bolts through the steel process.

Anchor calipers can measure three dimensions of the cross section of the mining rock bolt: the diameter of the base circle, the diameter of the spiral, and the width of the non-spiral portion. The spiral of the mining rock bolt is a standard spiral. In the standard radial direction perpendicular to the axial direction of the base circle, one side is always at the top of the spiral tooth, so the diameter of the base circle is difficult to measure directly. Anchor caliper adopts high-resolution industrial camera continuous camera and accurate image processing technology to realize the online measurement of the anchor, which can solve the measurement problem and increase the measurement pitch, tooth crest width, alveolar width and two tooth height on the side.

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