描述
該項目實施后不僅滿足欄污柵柵前、柵后水位及壓差的多點實時監(jiān)測,及報警功能,而且結束了攔污柵測量系統(tǒng)獨立工作,無法與電廠計算機監(jiān)控系統(tǒng)通訊的局面。實現(xiàn)與閘門系統(tǒng)的監(jiān)視功能、控制功能以及故障時ON-CALL尋呼系統(tǒng)功能的集成。滿足了無人值班電站的需要。該技術在云南省電力系統(tǒng)還是第一家。
今后,我們打算將攔污柵柵前水位(即壩前水位)送給水輪機調速器系統(tǒng),實現(xiàn)自動調整水頭,使機組在最優(yōu)工況下運行。
二、超聲波物位計測量水位的原理以及安裝要求
超聲波物位計工作時,高頻脈沖聲波由換能器(探頭)發(fā)出,遇被測物體(水面)表面被反射,折回的反射回波被同一換能器(探頭)接收,轉換成電信號。脈沖發(fā)送和接收之間的時間(聲波的運動時間)與換能器到物體表面的距離成正比,聲波傳輸?shù)木嚯xS與聲速C和傳輸時間T之間的關系可以用公式表示:S=CⅹT/2
例如:聲速C=344m/s,傳輸時間為50ms,即可算出傳輸?shù)木嚯x為17.2m,測定距離為8.6m。
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