海洋上层高分辨率温度链观测系统设计

Design of High Resolution Thermistor Chain Observation System in the Upper Ocean

为满足海洋上层温度数据高分辨率实时观测需求,本文设计出一种成本低、体积小、精度高的温度链观测系统,可搭载于调查船、浮标等多种海洋观测平台,具备高分辨海表温度数据实时观测功能。本文介绍了温度链系统架构的整体设计,阐述了温度传感器的高精度测量原理与方法,采用RS-485通信方式并设计出一套适用于温度链的软件通信协议,通过标定、均一性测试、稳定性测试验证了传感器的测量性能,研制出总长200 m的温度链观测设备,设备带有10个测温节点,传感器节点初始测量精度优于±0.005℃,温度链采样间隔最短可达2.7 s。本温度链在我国南海进行了拖曳功能测试,试验结果表明:温度链海上作业通信稳定可靠,数据测量准确,满足海洋现场观测对数据高时效、高精度、低误码率的传输要求。

In order to meet the demand for high-resolution real-time observation of upper ocean temperature data,this paper designs a low-cost,small-volume,high-precision thermistor chain observation system,which can be mounted on various ocean observation platforms such as survey ships and buoys.At the same time,it also has the function of real-time observation of high-resolution upper-ocean temperature data.This paper introduces the overall design of the thermistor chain system architecture,expounds the high-precision measurement principle and method of the temperature sensor,adopts the RS-485 communication method and designs a set of software communication protocols suitable for the thermistor chain.The measurement performance of the sensor was verified through calibration tests,uniformity tests and stability test,and a thermistor chain observation device with a total length of 200 m has been successfully developed,including 10 temperature measurement nodes.The initial measurement accuracy of the sensor nodes is better than ±0.005℃,and the sampling interval of the thermistor chain can be as short as 2.7 s.The towing function test of this thermistor chain was carried out in the South China Sea.The test results show that the thermistor chain's offshore operation communication is stable and reliable,and the data measurement is accurate,which meets the transmission requirements of high timeliness,high precision and low bit error rate for marine field observation.