Device and method for performing noncontact measurement on liquid physical parameters by utilizing wall optical characteristics

Abstract

The invention discloses a device for performing noncontact measurement on liquid physical parameters by utilizing wall optical characteristics. According to the device, an imaging layer is arranged on an outer wall of a cylindrical glass container filled with liquid to be measured; a dark box is arranged at the periphery of the imaging layer on the outer wall of the cylindrical glass container; a semiconductor laser is arranged on an outer side wall of the dark box, and a right-angled light guide screening tube connected with a central position of the imaging layer is arranged at the periphery of a light inlet hole in an inner side wall of the dark box; a laser mirror which forms an included angle of 45 degrees with a central line of a horizontal section and forms an included angle of 45 degrees with a central line of a vertical section is arranged at a corner in the right-angled light guide screening tube; a CCD (Charge Coupled Device) camera connected with a computer through a data line is arranged at the end of the dark box. The testing method comprises the following steps: filling the liquid to be measured into the cylindrical glass container, irradiating laser beams to the imaging layer, forming elliptical dark spots on the imaging layer, measuring the length of a long axis of the elliptical dark spots, calculating the refractive index according to a refractive index formula, and calculating other physical parameters of the liquid to be measured according to a relationship between the refractive index and other physical parameters of the liquid to be measured.

Description

technical field [0001] The invention belongs to the technical field of optical measurement, and in particular relates to a device and method for non-contact measurement of physical parameters of liquid in a container by using the optical characteristics of the container wall. Background technique [0002] The refractive index, concentration, density, sugar content, soluble solids, and specific gravity of different liquids (solutions) are important physical parameters that characterize different liquids or different technical properties of the same liquid. The measurement of these parameters is of great significance in the fields of chemical industry, petroleum, coal, pharmaceuticals, biology, food, beverage, environmental protection, papermaking, material science, education and scientific research. Therefore, research on accurate and rapid measurement techniques for the above physical parameters has always been a hot issue in related fields, and with the emergence of various...

AI Technical Summary

Problems solved by technology

At present, there are many devices using geometric optics to measure the refractive index of liquids, but the general disadvantage is that the liquid to be measured must be taken out of the container and put into a measuring instrument for measurement, which is harmful to the measurement of toxic, harmful, flammable and explosive liquids. It is dangerous, and it is easy to cause waste for precious liquids, and it is even more impossible to measure the refractive index of liquids under very high pressure and very high temperature in real time.

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