Comparison and measurement device and comparison and measurement method for deep sea subsurface buoy CTD

Abstract

The invention relates to a comparison and measurement device and a comparison and measurement method for deep sea subsurface buoy CTD. The device comprises a CTD connecting and fixing frame, a bearingbottom bracket, two upper fixing cross beams, two bottom fixing cross beams and six bearing vertical rods, the two upper fixing cross beams are connected to the middle of the CTD connecting and fixing frame, the upper ends of the six bearing vertical rods are perpendicularly connected with the CTD connecting and fixing frame and evenly distributed on the circumference of the CTD connecting and fixing frame, and the six bearing vertical rods are perpendicularly connected with the bearing bottom bracket. The middle of the bearing bottom bracket is connected with the two bottom fixing beams. Thecomparison and measurement method can be divided into a comparison and measurement preparation stage, a comparison and measurement stage, a comparison and measurement completion stage and a calibration coefficient calculation stage. According to the method, the SBE9 type CTD with higher precision and more accurate data is taken as a measurement standard, and the error value of the CTD of the deepsea subsurface buoy can be obtained, so that the internal calibration coefficient of the deep sea subsurface buoy is corrected, and the problem that the data accuracy is reduced after the deep sea subsurface buoy is distributed for a long time is solved.

Description

technical field [0001] The invention belongs to the field of marine scientific investigation, in particular to a comparative measuring device and a comparative measuring method for CTD (temperature and salinity depth instrument) of deep-sea submerged mark. Background technique [0002] Driven by the national ocean strategy and the deep sea development plan, my country's ocean research in various ocean disciplines has gradually developed and moved towards the ocean. At present, Chinese scientists have deployed many submersible buoy systems in the deep sea. The CTD-related equipment used by deep-sea submersible buoys includes the SBE37 CTD produced by Sea-Bird, the SBE56 T and the CTD produced by RBR. Under normal circumstances, after a set of submersible system works underwater for one year, the scientific research personnel will recover the submersible, read data, replace the battery and reset the equipment such as CTD, and finally form the submersible again. The marking sy...

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Problems solved by technology

[0003] At present, due to time and cost reasons, CTD of deep-sea submersibles cannot be brought back to land for calibration, and scientific research ships do not have the conditions for calibration. Therefore, the CTD equipment of deep-sea submersibles is generally not calibrated. After long-term use, the accuracy of the instrument is doubtful. serious impact on the validity and credibility of scientific research

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