Device and method for sampling water body buoy section

Abstract

The invention provides a device and a method for sampling a water body buoy section. The device comprises an electronic cabin unit mounted inside the buoy and a section sampling unit suspended below the buoy. The section sampling unit comprises a section water inlet pipe, three-way valves mounted on the section water inlet pipe at intervals, a steel cable, pressure sensors which are mounted on the steel cable and are arranged on the same horizontal plane as the three-way valves and correspond to the three-way valves, and a heavy punch connected with the tail end of the steel cable. The electronic cabin unit comprises a flowmeter connected with the section water inlet pipe, a water quality measuring chamber connected with the flowmeter, a pumping device connected between the flowmeter and the water quality measuring chamber, a data acquisition module which is connected with the pressure sensor, the pumping device and the water quality measuring chamber and used for controlling the water sample acquisition, deep measurement and water quality analysis as well as recording the measured data, and a solar power supply system for supplying power to the whole set of sampling device. By the device and the method, water samples in different water layers can be acquired automatically and used for analyzing the water quality, so that the purpose of unmanned, long-term and continuous sampling is achieved.

Description

technical field [0001] The invention relates to the technical field of water environment monitoring, in particular, the invention relates to a sampling device and method for a water body buoy profile. Background technique [0002] The physical, chemical and biological factors of different water layers in oceans, lakes, reservoirs, rivers and other water bodies vary greatly. Traditional monitoring buoys generally only monitor surface water bodies and cannot truly reflect the water quality of the entire water body profile. For example, in the ocean, phytoplankton can survive in the entire euphotic zone at a depth of 0-200m, so only measuring the phytoplankton biomass in the surface water cannot represent the phytoplankton biomass in the entire 200m water column. [0003] In order to be able to conduct long-term monitoring of water bodies at different depths, researchers have designed a variety of methods and devices for profile measurement, which can basically be divided into ...

AI Technical Summary

Problems solved by technology

The buoy and sensor profile movement method is not suitable for the measurement of nutrients and biological indicators that are complicated and time-consuming; the sensor profile deployment method can only measure simple physical indicators. If the nutrient analysis and biological analysis instruments are also profiled Deployment, the cost is too high; the sampling pipe profile motion method is susceptible to drift

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