Seawater multiparameter sensor based on full-wavelength spectrum method

Abstract

The invention relates to the technical field of environmental chemistry monitoring, in particular to a seawater multiparameter sensor based on a full-wavelength spectrum method. The seawater multiparameter sensor comprises a housing, wherein a filtering unit, a pressure reduction unit, a temperature-salinity monitoring and controlling unit, a detection unit, a waste liquid tank and a power supply. The seawater multiparameter sensor based on the full-wavelength spectrum method applies a single detector to achieve the multiparameter detection purpose based on spectrum detection. Due to the fact that multiparameter detection is achieved by adopting the spectrum method, most of devices are shared, the overall energy consumption can be reduced, the underwater operating time can be prolonged, the cruising power is improved, and possibility is provided for system integration. By adopting the design, the seawater multiparameter sensor is integrated in the same double-layer pressure-resistant cabin, normal work of the multiparameter sensor under the deep sea condition can be ensured, the operation that a titanium alloy coated sensor housing is designed for a single sensor is also avoided, and the cost is effectively reduced.

Description

technical field [0001] The invention relates to the technical field of environmental chemical monitoring, in particular to a seawater multi-parameter sensor based on full-wavelength spectroscopy. Background technique [0002] With the increasing requirements for the development and utilization of marine resources and the protection of the marine environment, the demand for real-time and accurate measurement of various physical and chemical parameters in seawater is increasing. The international Argo program and the "Transparent Ocean" program being implemented in my country all require in-situ monitoring technology to continuously collect a large amount of data. For example dissolved colored organic matter (CDOM) CDOM, dissolved organic carbon DOC, nitrate (NO 3 - )NO3- and other parameters are essential and important parameters in marine survey and environmental monitoring. [0003] The sampling pump attached to the commercially available sensor, as the measurement depth...

AI Technical Summary

Problems solved by technology

[0003] The sampling pump attached to the commercially available sensor, as the measurement depth increases, the control accuracy of the flow rate / flow rate becomes worse and worse, resulting in a drift in the detection limit and detection accuracy of the sensor, which affects the accuracy of the measurement result

In 2013, the German TriOS company and the Canadian Satlantic company successively launched the direct measurement of NO3 based on ultraviolet light. - Sensor products, but limited by optical path design, sample collection flow rate fluctuation interference, detection limit is 0.5μM, due to equipment pressure limit, the current use depth does not exceed 500m

The light source of this type of sensor has high energy density, long luminous time and stable performance, but at the same time, it has high power and high energy consumption

For sensor systems powered by underwater batteries, the integrated use of multiple single-function sensors will seriously affect the underwater endurance time, thus limiting its scope of use

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