Dual optical path type scattered water quality turbidity measurement apparatus

Abstract

The invention discloses a dual optical path type scattered water quality turbidity measurement apparatus. The water quality turbidity measurement apparatus comprises a signal processing unit and a measurement chamber, wherein a light source is arranged in the measurement chamber, the turbidity measurement apparatus is characterized in that a semi-reflecting translucent mirror is arranged below the light source, a collimating lens is arranged below the semi-reflecting translucent mirror, a first detector is arranged in the measurement chamber, the light source is received by the first detector after being reflected by the semi-reflecting translucent mirror and then is transmitted to the signal processing unit, the light source is irradiated into a detected water sample through the collimating lens after being subjected to transmission by the semi-reflecting translucent mirror; a converge lens and a second detector are arranged in a direction vertical to a parallel light, light rays, scattered by 90 DEG by the detected water sample, of the parallel light are received by the second detector trough the convergence lens and are transmitted to the signal processing unit, the convergence lens and the second detector are arranged in the detected water sample, the collimating lens is arranged above the detected water sample, and the signal processing unit is used for processing received signals so as to obtain a turbidity value of the detected sample. The turbidity measurement apparatus disclosed by the invention is simple in structure, small in volume and relatively high in measurement precision.

Description

technical field [0001] The invention relates to the field of water quality turbidity measuring instruments, in particular to a double light path scattering water quality turbidity measuring instrument. Background technique [0002] Turbidity is a term for the effect of impurities such as suspended solids, colloidal substances, and microorganisms in water with different sizes, specific gravity, and shapes on light. Turbidity is one of the important physical appearance indicators of water quality. With the improvement of our living standards, the term "turbidity" of water has been more and more widely used in production and scientific research, and it has also entered our Life. At present, most of our country uses transmitted light turbidity measuring instrument, because domestic manufacturers mainly produce this type, while in the international countries such as Britain, the United States and Japan, scattered light turbidity measuring instrument (measures 90° scattered light...

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Problems solved by technology

According to incomplete statistics, the total amount of industrial turbidity measuring instruments required in my country every year is about 1,000. At present, almost 80% of them are imported instruments. However, foreign turbidity measuring instruments are expensive, and the spare parts and maintenance costs are expensive. Inconvenience and other issues

However, domestic turbidity measuring instruments on the market still have a large gap with imported instruments in terms of measurement accuracy and measurement effect, and it is difficult to apply to low-range or even ultra-low-range monitoring such as drinking water quality monitoring.

Most of the existing turbidity measuring instruments using dual optical path detection use beam splitting or multi-stage lens groups and beam splitting devices with pendulum mirrors. The structure is complex and the instrument is bulky, which is not conducive to popularization in small water stations.

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