Digital photoelastic device

Abstract

The invention relates to a digital photoelastic device, comprising a light source which can emit white and single-color light, a photoelastic body which receives the light beam emitted by the light source so as to generate an imaging light beam, an imaging component which receives the imaging light beam and converts the imaging light beam into an electric signal, and a computer imaging collection system which collects the electric signal so as to obtain a digital image; wherein, the light source comprises an LED array plate where an LED lamp array which can emit the light color is arranged, and an interference color filter which is selectively arranged on the outlet optical passage of the LED array plate so as to decide whether the light source emits white or single-color light.

Description

technical field [0001] The invention relates to the field of photoelasticity, in particular to a digital photoelasticity instrument. Background technique [0002] Photoelasticity, referred to as photoelasticity, is a model experiment technique. The instrument used for photoelasticity research is a photoelasticometer. This is the only optical measurement method that can measure the internal stress of a model, so it has attracted much attention in the industry. [0003] There are two common types of photoelasticity instruments: transmission type and reflection type. Among them, the representatives of the transmission type are the 408 photoelastic instrument produced by Beijing Scientific Instrument Factory and the 409 photoelastic instrument with a large field of view. The reflective photoelastic instrument is based on the Photostress of VISHAY to represent. [0004] The traditional photoelasticity research also uses film to record the stripes. Not only is the equipment com...

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Problems solved by technology

[0006] 1. Monochromatic light sources are mainly concentrated on traditional light sources such as sodium lamps (wavelength of 589.6nm) and mercury lamps (wavelength of 579.0nm) with high cost, low life and poor monochromaticity. difficult to meet needs;

[0007] 2. The polarizer and the quarter-wave plate cannot be rotated automatically and synchronously as required;

[0008] 3. Data collection cannot be processed by computer. Either use an imaging mirror to image the stripes on white paper by hand, or use cassette film to shoot and then print, which cannot meet the requirements of modern engineering rapid processing.

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