Automatically layered quantitative sampler for skotoplankton

Abstract

The invention provides an automatic layering quantitative sampler for skotoplankton, which comprises a bracket, a sampling unit and a control unit, and is characterized in that the bracket comprises a frame and a supporting plate arranged in the frame, and the sampling unit and the control unit are arranged at the supporting plate. The sampling unit comprises diving pumps, a multi-path shunt, an electromagnetic valve, an electronic flow meter, a plankton filter screen, a sample collecting tube and a sample discharging valve; the diving pumps are connected to a water inlet of the corresponding plankton filter screen through the multi-path shunt respectively; the lower end of the plankton filter screen is provided with the sample collecting tube and the sample discharging valve; and the electromagnetic valve and the electronic flow meter are arranged at each water outlet pipeline respectively. The control unit is connected with the electromagnetic valve, the electronic flow meter and a pressure sensor, and powdered by a storage battery. The sampler accurately separates water layers and precisely and quantitatively samples, and has the advantages of high degree of automation, convenient operation and reliable use.

Description

technical field [0001] The invention relates to a marine biological sampling test equipment, in particular to an automatic layered quantitative sampler for deep-water plankton. Background technique [0002] Plankton are the main basic producers in the ocean, not only providing food for higher trophic level organisms, but also participating in marine biogeochemical processes. Therefore, plankton is one of the main research contents of marine ecology and fishery environment research and many internationally renowned research programs such as IOC, GLOBEC, LMEs, etc. The research mainly includes biomass, abundance, productivity (fecundity), etc. and their relationship with the environment. The relationship between ecological factors, etc., among which biomass and abundance are the foundation of various studies. To this end, practitioners have invented various sampling tools, and they have been continuously improved during use. At present, the main tools for sampling plankton a...

AI Technical Summary

Problems solved by technology

At this time, its disadvantages are highlighted: (1) The whole process of sampling requires manual operation, cumbersome operation, heavy workload, frequent failures, easy entanglement between net gear and trawl wire rope, lack of protection for net clothing, easy damage, time-consuming, etc.

(2) Due to the large flow receiving surface of the plankton net, it is very easy to drift away from the sampling point to form a large trawl angle during sampling. In most cases, the trawl depth (distance) is estimated based on the length of the released wire rope, which is difficult to accurately control. depth of water layer

(3) Due to the drift of the net gear or the speed of the trawling net is too fast, the calculation of the volume of the filtered water of the plankton net will be too low or too high, resulting in a large sampling error. Although some samples are added with a flow meter, it still cannot be solved. The flow error caused by fast overflow cannot be accurately quantified

[0004] The advantage of the continuous zooplankton collector is that it can be used for continuous long-distance sampling. Although it can adjust the water layer or change the water layer sampling, it must rely on a certain horizontal dragging speed to achieve sampling, and it is impossible to complete fixed-point water layer sampling.

And there is also the disadvantage of poor quantitative performance

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