本文選題：鹽度計(jì) + 電導(dǎo)率傳感器　； 參考：《國家海洋技術(shù)中心》2017年碩士論文

【摘要】：實(shí)驗(yàn)室鹽度計(jì)是海水鹽度測量和定標(biāo)的基準(zhǔn)儀器,為溫鹽深測量儀器(CTD)等海洋觀測儀器提供實(shí)驗(yàn)室校準(zhǔn),在海洋觀測領(lǐng)域占據(jù)十分重要的地位。當(dāng)前,國內(nèi)對(duì)鹽度計(jì)有較大的需求,而高精度實(shí)驗(yàn)室鹽度計(jì)市場長期被加拿大8400B鹽度計(jì)壟斷,其售價(jià)及維修成本節(jié)節(jié)攀升。德國OPS實(shí)驗(yàn)室鹽度計(jì)也正在積極開拓國內(nèi)市場。國內(nèi)迫切需要一款更具競爭力的具有高精度、高穩(wěn)定性和自動(dòng)化測量特性的新型鹽度計(jì)產(chǎn)品。本文旨在研發(fā)一款基于高精度溫度、電導(dǎo)率傳感器的新型鹽度計(jì),推進(jìn)產(chǎn)品化并最終推向市場。文中深入研究了高精度溫度和電導(dǎo)率測量的原理與實(shí)現(xiàn)方法,并依據(jù)鹽度計(jì)的使用情景對(duì)傳感器、電路及程序做了針對(duì)性的優(yōu)化。本文在原有實(shí)驗(yàn)室鹽度基礎(chǔ)上,設(shè)計(jì)了恒溫水浴結(jié)構(gòu),將控溫區(qū)與測量區(qū)分隔,使用創(chuàng)新的算法實(shí)現(xiàn)半導(dǎo)體制冷與攪拌的聯(lián)合控溫,實(shí)現(xiàn)了環(huán)境±10℃范圍、高精度、高動(dòng)態(tài)響應(yīng)的水浴溫度控制,可直接測量任意溫度的海水樣品,避免其在溫度預(yù)平衡過程中鹽度值發(fā)生變化影響測量結(jié)果。本文完成了進(jìn)樣系統(tǒng)選型及驅(qū)動(dòng)電路設(shè)計(jì),實(shí)現(xiàn)沖洗、進(jìn)樣、排空等動(dòng)作自動(dòng)化操作,克服了人為操作因素的影響,最大化地提高了測量結(jié)果一致性和可信度。實(shí)驗(yàn)表明,鹽度計(jì)每次測量消耗水量小于20ml,在室溫附近時(shí)水浴控溫波動(dòng)度優(yōu)于0.001℃,鹽度測量值定標(biāo)后測量精度達(dá)到0.002PSU,一周內(nèi)漂移不超過0.0033PSU,滿足測量精度和穩(wěn)定性指標(biāo)。
[Abstract]:Laboratory salinometer is a reference instrument for seawater salinity measurement and calibration. It provides laboratory calibration for ocean observation instruments such as temperature and salt depth measurement instrument CTD, and occupies a very important position in the field of ocean observation. At present, there is a great demand for salinometer in China, and the high-precision laboratory salinometer market has been monopolized by Canada 8400B salinometer for a long time. Germany OPS laboratory salinometer is also actively developing the domestic market. There is an urgent need for a more competitive salinometer with high precision, high stability and automatic measurement characteristics. The aim of this paper is to develop a new salinometer based on high precision temperature and conductivity sensor. In this paper, the principle and realization method of high precision temperature and conductivity measurement are studied, and the sensor, circuit and program are optimized according to the usage of salinometer. On the basis of the original laboratory salinity, the structure of constant temperature water bath is designed in this paper. The temperature control area is separated from the measuring area, and the combined temperature control of semiconductor refrigeration and stirring is realized by using the innovative algorithm. The range of environment 鹵10 鈩，

本文編號(hào)：2005612