Two-channel optical fiber method and sensor for measuring turbidity

Abstract

The invention discloses a two-channel optical fiber method and two-channel optical fiber sensor for measuring turbidity. The method is characterized in that a detection mode adopting double light sources, four laser beams and four photo-electricity is adopted, and the double different-wavelength light sources can be alternately lightened by an optical measuring module, so that 90-degree scattered lights and transmission lights can be alternately measured; a temperature measuring module is used for collecting temperature signals of water; a signal adjusting module is used for processing collected turbidity signals and temperature signals; a data processing module is used for calculation and treatment so that turbidity values and a temperature values are generated, and the in-site collecting data are transmitted to an upper computer. The different-wavelength light sources are simultaneously measured so that the stray light impact on turbidity measurement is eliminated; the external impact on the light signals is avoided through optical fiber transmission, thus the method has the high-temperature and high-pressure resisting performances and the anti-electromagnetic interference performance; temperature compensation is performed on the measured turbidity values so as to improve the measurement precision of turbidity. In-site online detection for the turbidity values is realized by the method, thus the method is high in sensitivity, excellent in linearity, low in cost and easy to carry and install, and the method is applied to narrow detection space and occasions where detected liquid is limited in capacity.

Description

technical field [0001] The invention relates to a turbidity measurement method and sensor for water quality monitoring, in particular to a four-beam optical fiber turbidity measurement method and sensor with dual light sources and dual photoelectric detectors. It belongs to the technical field of sensor measurement. Background technique [0002] Turbidity is a measure of how clear water is. Because the water contains suspended and colloidal particles, the original colorless and transparent water is turbid, and the degree of turbidity is called turbidity. Turbidity indicates the presence of large amounts of bacteria, pathogens, or certain particles in the water. These particles may protect harmful microorganisms from being removed during the disinfection process. Turbidity is therefore a very important parameter in drinking water, industrial processes or products. High turbidity means high content of various toxic and harmful substances in the water. Therefore, the turbi...

AI Technical Summary

Problems solved by technology

The measurement system can only realize online monitoring of turbidity, but cannot realize remote transmission of data

The measurement system designed by this patent does not realize temperature compensation, and does not take into account the influence of temperature on turbidity detection

Images