Long-term on-line sea water quality monitoring device and method based on small buoy

Abstract

The invention relates to a long-term on-line sea water quality monitoring device and method based on a small buoy. The monitoring device comprises a buoy body, and a meteorological equipment installing tower is arranged on the upper portion of the buoy body. The monitoring device further comprises a multi-parameter water quality sensor and a sampling pool, the water quality sensor is installed on the sampling pool through a fixing frame, a probe of the sensor is located in the sampling pool, and the sampling pool is installed below the meteorological equipment installing tower arranged on the upper portion of the buoy body through a fixing frame; ultraviolet lamps are arranged on the inner wall of the sampling pool, the sampling pool is provided with a water inlet pipe with a peristaltic pump and a drainage pipe with a solenoid valve, and a water inlet of the peristaltic pump is communicated with sea water. The design that the water quality sensor is arranged above the buoy and placed above the sea water surface is provided for the first time, measured liquid is drained after measurement is finished, the sensor is placed in air, cheap and efficient air is used for achieving anti-biological adhesion of the water quality sensor, the service cycle is greatly prolonged, it is unnecessary to store or prepare disinfectant and cleaning fluid as a traditional method, and cost and safety risks are greatly reduced.

Description

technical field [0001] The invention relates to the field of marine environment monitoring, in particular to a device and method for long-term on-line monitoring of marine water quality based on small buoys. Background technique [0002] Ocean water quality parameters (seawater temperature, salinity, chlorophyll, turbidity, dissolved oxygen, PH, etc.) During the transportation process, the environment changes, which makes it difficult for the laboratory measurement results to fully reflect the nature of the seawater site. Therefore, it is gradually replaced by in-situ seawater measurement sensors. However, in the application process of the water quality sensor in the marine environment, it is easily affected by the pollution of seawater and marine organisms, which greatly reduces its application time at sea. Therefore, how to prevent the water quality sensor from being polluted by seawater and prolong its offshore working cycle is an important problem at present. . [0003...

AI Technical Summary

Problems solved by technology

This kind of water quality sensor can be installed on the buoy, and the water quality sensor can be directly placed in the seawater for on-site observation. The measurement data is accurate, and the sensor’s own anti-biological fouling characteristics can also be used to extend its on-site working cycle. However, after working for a long time, It is still unavoidable to be affected by biofouling, etc.

Another method is the way of pumping water sampling. The water quality sensor is placed in the sampling pool in the cabin or large buoy cabin. During the measurement, the seawater is drawn from the sampling pool. Clean water, etc. protect the water quality sensor probe, which can prolong the marine application period of the water quality sensor, but there are the following shortcomings, 1) multiple pumping and drainage in one measurement cycle, which increases the power consumption of the system; 2) a large amount of disinfectant needs to be stored Or clean water to protect the water quality sensor, or use complex seawater purification equipment; 3) For cabins, especially large unattended buoys, due to the large amount of water stored in the cabin, complex pumping, drainage, cleaning, disinfection and other processes are also required. There is a risk of water leakage causing damage to the compartment

4) For small marine water quality buoys, due to their small size, there is no large cabin space like large buoys to store a large amount of disinfectant and cleaning water. The above method cannot be used directly

Images