Portable Intelligent Stress Analyzer SCALP-05
This instrument employs dynamic laser polarized scattering method to measure the stress state of glass through polarized laser technology, high-speed image acquisition technology, and digital polarimeter technology.
Portable Intelligent Stress Analyzer SCALP-05
Introduction
This instrument employs dynamic laser polarized scattering method to measure the stress state of glass through polarized laser technology, high-speed image capture technology, and digital polarimeter technology. It is capable of measuring both surface stress and stress distribution in the thickness direction of the glass. The instrument boasts compactness, portability, fast measurement speed, and automatic measurement capabilities, allowing for on-site measurements when connected to a laptop or tablet computer. It is suitable for flat glass, photovoltaic glass, and automotive glass with float glass or rolled glass as the base material. It effectively measures the surface and internal stress distribution of solar cell textured cover glass, and is particularly well-suited for building facade glass and window glass that have already been installed on walls.
Principle
Light passing through isotropic transparent media is scattered due to the action of particles or molecules within the medium, resulting in polarization. Scattered light perpendicular to the direction of propagation is plane-polarized, with its intensity depending on the nature of the incident light, the material's birefringence properties, and the observation direction. Non-crystalline materials such as plastics, glass, and epoxy resins are usually isotropic and do not exhibit birefringence. However, when subjected to stress, they become anisotropic and show birefringent properties, a phenomenon known as photoelasticity.
This instrument employs the laser polarization scattering method, particularly effective for measuring the residual stress in glass and strain under complex loads. It can even provide relatively accurate stress distribution maps at the sudden fracture points of the material, making it a crucial method for detecting critical stress points and stress concentration areas.
The stress within glass induces birefringent properties, creating photoelastic effects. The degree of birefringence in the polarized laser beam passing through the glass is related to the stress distribution and the material's refractive index. The SCALP portable intelligent stress analyzer employs a 5mW polarized laser beam, which tilts through the glass material under test. Within the plane perpendicular to the beam's propagation direction, the beam is decomposed at each point into two polarized light components along the two principal stress directions of the stress state. These components have a phase difference proportional to the difference in the material's principal stresses, which varies along the light path. The intensity changes along the beam's propagation direction are recorded, and from these, the phase difference of the two polarized light components at each pixel point is calculated. The stress values at each point are derived from the phase difference variations.
Technical Specifications
This instrument is suitable for measuring automotive glass, embossed glass, and architectural glass. It features an expandable PDA with a Chinese software interface.
Specific technical parameters are as follows:
