High-precision high-accuracy turbidity measurement device and method

Abstract

The invention belongs to the technical field of water treatment, and provides a high-precision high-accuracy turbidity measurement device and method. The high-precision high-accuracy turbidity measurement device comprises an LED light source unit, a prism set unit, a photoelectric signal receiving unit and a single chip microcomputer unit, which are sequentially connected; the single chip microcomputer unit is also connected with the LED light source unit; the single chip microcomputer unit transmits a pulse signal to the LED light source unit, and the LED light source unit generates a modulation light signal and then transmits the modulation light signal to the single chip microcomputer unit; the prism set unit receives the light signal and outputs scattering light in parallel with incident light; the photoelectric signal receiving unit converts the scattering light into an electric signal and transmits the electric signal to the single chip microcomputer unit; the single chip microcomputer unit performs temperature compensation, reference signal comparison and light intensity compensation processing on received numerical value information to obtain the turbidity value of a water body to be tested. The high-precision high-accuracy turbidity measurement device and method have the advantages that weak signals associated with a reference signal can be detected; signals unassociated with the reference signal are filtered, the influence of temperature and light intensity on turbidity measurement is reduced, and the precision and the accuracy of measurement are improved.

Description

technical field [0001] The invention belongs to the technical field of water treatment, in particular to a high-precision and high-accuracy turbidity measurement device and method. Background technique [0002] Suspended and colloidal substances such as soil, silt, fine organic matter, inorganic matter, and plankton in the water can make the water turbid and present a certain turbidity. Usually, the higher the turbidity, the more turbid the solution. There are two commonly used turbidity measurement methods: transmission method and scattering method. Among them, the measuring device emits light, makes it pass through the sample to be tested, and detects how much light is scattered by the particles in the water from a direction 90° to the incident light. This scattered light measurement method is called the scattering method; by measuring The method of measuring turbidity by the degree of attenuation of light intensity after light passes through the sample is called the tra...

AI Technical Summary

Problems solved by technology

[0004] The current transmission method has interference problems such as color absorption or particle absorption, and the accuracy and precision of the measurement results are poor; while the traditional scattering method detects water with low turbidity, such as tap water and membrane filtered water, due to the scattering of these water bodies The light intensity is extremely weak, generally submerged in the noise of the circuit, especially in outdoor waters, the measured signal will be easily interfered by sunlight and other surrounding light, and there are problems of poor measurement accuracy and anti-interference ability in low-turbidity media

[0005] Therefore, in the field of water treatment technology, there is an urgent need for a method that can detect weak signals related to the reference signal and filter out signals that are not related to the reference signal, so as to overcome the low accuracy and minimum detection limit of the online turbidity sensor that is easily interfered by ambient light. High-precision and high-accuracy turbidity measurement device and method to improve the precision and accuracy of low-turbidity medium turbidity measurement

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