摘 要：為了實(shí)現(xiàn)了液體測量的智能化，提高測量系統(tǒng)的測量精度和可靠性，系統(tǒng)采用兩個差壓電容式傳感器來獲得容器內(nèi)液體的密度和液位高度，減小或消除了密度變化引起的測量誤差。兩差壓傳感器的輸出通過C/U轉(zhuǎn)換電路及A/D轉(zhuǎn)換后輸入單片機(jī)進(jìn)行數(shù)據(jù)處理，顯示容器內(nèi)液體的密度、液位高度及儲量。系統(tǒng)實(shí)現(xiàn)了測量數(shù)據(jù)的自動采集和多參數(shù)測量。

關(guān)鍵詞：雙差壓法;電容式差壓傳感器;液位;密度;儲量

An intelligent measurement system for saving liquid based on capacitance sensor Wang Yanju,Wang Xinian,Wang Yutian

Abstract: In order to realize liquor intelligent measurement, to advance the measuring precision and the reliability of the system, two differential pressure sensors are used to obtain the density and liquid height of the liquid in the container, and the error caused by changeable density is improved or eliminated. The output of the sensors is converted by C/U conversion circuit, and by A/D changing, being send to computer. After data processing, the liquor density, height and reserves data are showed. The system can realize the automated data collection and multi-parameter.

Key words: Double-difference pressure; Capacitive differential pressure sensor; liquid level; density; reserves

0 引言

在石油化工、食品等行業(yè)的各種液體的存儲、轉(zhuǎn)運(yùn)、交接等過程中，液體的自動化測量技術(shù)和現(xiàn)代化管理手段正越來越受到重視。由于種種原因目前我國多數(shù)企業(yè)還處于人工操作階段，每天需要很多工作人員周期地進(jìn)行大量的數(shù)據(jù)采集與計(jì)算工作。這種狀況與計(jì)量發(fā)展的現(xiàn)代化趨勢極不協(xié)調(diào)，而且太多人為因素影響了測量的準(zhǔn)確性和可靠性。因此，多年來大量的科研工作者為此進(jìn)行了不懈的努力。本文設(shè)計(jì)了一種基于雙差壓傳感元件的液體智能化測量系統(tǒng)，系統(tǒng)采用兩個電容式差壓傳感器作為檢測元件，分別檢測液體的密度和液位高度，設(shè)計(jì)C/U及A/D轉(zhuǎn)換電路，用單片機(jī)對數(shù)據(jù)進(jìn)行處理，使測量系統(tǒng)實(shí)現(xiàn)智能化、數(shù)字化和高精度。雙差壓傳感器的使用減小或消除了因外界環(huán)境變化而引起液體密度變化給液位測量帶來的誤差。

詳情請點(diǎn)擊：基于電容式傳感器的儲液智能化測量系統(tǒng)