科技通报
科技通報
과기통보
BULLETIN OF SCIENCE AND TECHNOLOGY
2014年
8期
167-169
,共3页
液位检测%功率激励%电路设计%零点漂移
液位檢測%功率激勵%電路設計%零點漂移
액위검측%공솔격려%전로설계%영점표이
liquid level detection%power incentive%circuit design%zero drift
工业生产中储罐中的液位非接触式隔离检测是实现精确工业控制的关键。传统的罐体液位检测方法采主要采用红外和声脉冲等探测算法，信号处理精度不高，抗干扰能力差，无法有效实现隔离远程非接触式检测。提出一种基于分离主频发射技术的罐体隐形液位非接触式隔离检测方法，并进行电路设计。设计液位检测超声信号发射机和接收机电路，基于ADP3339来变换DC-DC输出，去除检测仪电路中耦合噪声。实验表明，采用该设计进行冶金高炉钢水液位非接触式隔离检测，共模抑制比高达93dB，有效消除零点漂移现象，提高了液位检测精度。
工業生產中儲罐中的液位非接觸式隔離檢測是實現精確工業控製的關鍵。傳統的罐體液位檢測方法採主要採用紅外和聲脈遲等探測算法，信號處理精度不高，抗榦擾能力差，無法有效實現隔離遠程非接觸式檢測。提齣一種基于分離主頻髮射技術的罐體隱形液位非接觸式隔離檢測方法，併進行電路設計。設計液位檢測超聲信號髮射機和接收機電路，基于ADP3339來變換DC-DC輸齣，去除檢測儀電路中耦閤譟聲。實驗錶明，採用該設計進行冶金高爐鋼水液位非接觸式隔離檢測，共模抑製比高達93dB，有效消除零點漂移現象，提高瞭液位檢測精度。
공업생산중저관중적액위비접촉식격리검측시실현정학공업공제적관건。전통적관체액위검측방법채주요채용홍외화성맥충등탐측산법，신호처리정도불고，항간우능력차，무법유효실현격리원정비접촉식검측。제출일충기우분리주빈발사기술적관체은형액위비접촉식격리검측방법，병진행전로설계。설계액위검측초성신호발사궤화접수궤전로，기우ADP3339래변환DC-DC수출，거제검측의전로중우합조성。실험표명，채용해설계진행야금고로강수액위비접촉식격리검측，공모억제비고체93dB，유효소제영점표이현상，제고료액위검측정도。
The liquid level of storage tank in industrial production of non-contact detection is the key to realize the accurate isolation of industrial control. Traditional liquid level detection method mainly adopts infrared and acoustic pulse detection algorithm. A non detection method of contact isolation tank stealth level separation technique is proposed based on the fre-quency of emission, and circuit design is obtained. Analysis of sensor configuration and modeling are taken. The noise cou-pling of circuit tester is removed. Experiments show that, the design method is used in blast furnace molten steel liquid lev-el detection, the common mode rejection ratio reach 93 dB, it can effectively eliminate the zero drift phenomenon, improve the level of detection accuracy.
