Special device for measuring large curvature radius and measuring method

Abstract

The invention discloses a special device for measuring a large curvature radius and a measuring method. The special device is characterized in that a handle is mounted on the bottom of an elastic U-shaped bracket, and a high elastic steel sheet is fixed between two ends of the U-shaped bracket; rollers are installed on the two ends of the U-shaped bracket; strain gauges are pasted on the centers of the front and back sides of the high elastic steel sheet; the handle is equipped with a wireless strain collector; the two strain gauges and the wireless strain collector form a half-bridge measuring circuit by means of wires; it is required that the high elastic steel sheet can be freely bent without plastic deformation after bearing force. According to the special device, the strain gauges are pasted on both sides of the elastic steel sheet which can be freely bent without plastic deformation, so that the strain gauges on both sides and the wireless strain collector form the half-bridge measuring circuit, thus eliminating tensile strain. Only the bending strain is measured and the curvature of a curved surface is derived from the bending strain. Therefore, a technical problem in the field is solved.

Description

technical field [0001] The invention relates to a measuring instrument, especially suitable for measuring the radius of curvature of large curved surface structures in building structures and industrial products. Background technique [0002] With the continuous innovation of art forms in the construction industry and the application of 3D printing technology in this field, the software design and numerical control processing technology of large-scale industrial products are more advanced and free, and people are looking forward to and loving complex, abstract and artistic products and buildings. Therefore, there will be more and more large-scale structures with free-form surfaces in the future. In the process of product reference design, copy construction, inspection and monitoring, and aesthetic perception, it is necessary to conveniently measure and record the curvature radius of its curved surface. [0003] In engineering, there are two commonly used tools for measuring ...

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Problems solved by technology

[0006] Aiming at the difficult problem of on-site measurement of the radius of curvature of the existing large curved surface structure, the present invention proposes a special device for measuring the radius of curvature

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