Measuring method for non-gate-control liquid turbidity measuring device based on time correlation single photon counting

Abstract

The invention discloses a measuring method for a non-gate-control liquid turbidity measuring device based on time correlation single photon counting. The non-gate-control liquid turbidity measuring device comprises a light source module, a light path transport module, a photovoltaic conversion and single processing module and a standard turbidity liquid. According to the method, after being subjected to modulation by a high-speed narrow pulse, a light source acts on the standard turbidity liquid, after being received, 90-degree scattered lights of the standard turbidity liquid act on the photovoltaic conversion and single processing module to obtain a statistical histogram of photo count values and light flight time, and characteristic parameters on the statistical histogram are extracted; the measuring device is calibrated according to a characteristic parameter acquiring method to obtain inherent parameters of the device; during practical measurement, a turbidity value of a liquid to be measured can be obtained after corresponding characteristic parameters obtained through statistical measurement as well as the inherent parameters of the device are subjected to inversion, so that the accurate measuring of the liquid turbidity can be realized. According to the method, the structure of the device is simple, the stability is high, the realization is easy, the measurement accuracy is high, the measuring speed is high, the real-time performance is good, and a technical support is provided for on-line water quality monitoring in real time.

Description

technical field [0001] The invention relates to a measurement method of a non-gated liquid turbidity measurement device based on time-correlated single photon counting, and belongs to the technical field of environmental monitoring. Background technique [0002] Turbidity is a comprehensive index to measure water quality, and it is also an important index to monitor water pollution and eutrophication. At present, turbidity is widely used as a sign of water purification effect in various countries. Although inorganic substances and silt in water are not necessarily directly harmful to health, they can absorb bacteria, viruses and parasites, which is a potential unsafe factor. Some data show that the incidence of viral infectious diseases tends to increase as the turbidity of filtered water increases. Research conducted by the US National Environmental Protection Agency (USEPA) has shown that reducing the turbidity of factory water to 0.5NTU can greatly reduce the spread of ...

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Problems solved by technology

[0016] The main purpose of the present invention is to provide a measurement method of non-gated liquid turbidity measurement device based on time-correlated single photon counting, to solve the deficiencies of existing turbidity measurement technology, especially to solve the real-time online solution of low turbidity measurement Accurate measurement, high precision and stable measurement and other issues

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