Portable on-line device for detecting water pollutants

Abstract

The invention discloses a portable on-line device for detecting water pollutants. The water sample to be detected is introduced to a beam waist area converging Gaussian beams by adopting a stream guiding method, the average grain diameter and the particle number concentration of the micrometer particle pollutants in water are detected by a transmission fluctuation method, and signal acquisition and processing are carried out through a digital signal processor (DSP); the parallel beams emitted by a laser collimator are converged by a convex lens; the transmission light is converged by a receiving lens, is received by a light signal detector and is converted into electrical signals; a weak signal is connected with a signal acquisition device and a microprocessor after being amplified by an amplifier; the microprocessor is respectively connected with a liquid crystal display and a keyboard through an interface; a draft tube is a bent tube; a water inlet is connected with a one-way driving pump; a detection area is arranged on the beam waist area converging Gaussian beams; the water sample to be detected is introduced to the beam waist area converging Gaussian beams by the one-way driving pump; and below the detection area, the draft tube is provided with a water outlet. The device is light and portable, and can realize online and real-time detection for water pollutants.

Description

technical field [0001] The invention relates to a portable water pollutant online detection device capable of simultaneously measuring the average particle diameter and particle number concentration of water pollution particles, which is suitable for water quality detection in multiple fields such as environment, industry and daily life. Background technique [0002] Existing multi-parameter water quality detectors can simultaneously measure parameters such as pH, ORP (oxidation-reduction potential), TDS (total dissolved solids), dissolved oxygen, temperature, conductivity, salinity, etc. The average particle size and particle number concentration measurement, and the average particle size and particle number concentration of particles are very important parameters in the field of water quality testing. [0003] The transmittance fluctuation method generally uses two methods to obtain a narrow beam. One method is to use a detector with a small light-receiving area, and the o...

AI Technical Summary

Problems solved by technology

The first method is that a detector with a small light-receiving area has high requirements on light source power, signal reception and amplification, and the detector with a small light-receiving area is expensive

The second method is difficult to achieve ideal measurement of small particles because the beam diameter varies with the propagation direction

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