一种基于超声测距技术的超声液位仪设计

发布时间：2018-01-24 09:41

本文关键词： 液位检测密闭容器超声传感器液位仪　出处：《传感器与微系统》2014年09期 　论文类型：期刊论文

【摘要】：为了在工业生产中可以快速、精确地对密闭容器中的液体进行液位检测,设计了一种基于超声测距技术的超声液位仪,针对密闭条件下的液体液位进行精确检测。系统采用数字信号处理(DSP)控制电路,搭建了低噪声、大动态范围的检测电路,完成了适用密闭容器中液体液位的超声传感器选型。实验用超声探头频率为3.0MHz,密闭容器的壁厚为4mm,液位每变化10cm测量一次,用100cm范围内检测数据与标准液位变化值作对比。实验结果显示:同一液位上多次检测求平均值得到的检测数据与标准值的相对误差小于0.5%,所以,本系统满足在0.2~1m范围内,密闭容器中液位测量精度高于1mm的设计要求。
[Abstract]:In order to detect liquid level in closed vessel quickly and accurately in industrial production, an ultrasonic liquid level meter based on ultrasonic ranging technology is designed. The system uses digital signal processing (DSP) control circuit to build a low noise, large dynamic range detection circuit. The ultrasonic sensor type suitable for liquid level in closed vessel is completed. The frequency of ultrasonic probe is 3.0 MHz, the wall thickness of sealed vessel is 4 mm, and the liquid level is measured every 10 cm. The experimental results show that the relative error between the measured data and the standard value is less than 0.5%. Therefore, the system can meet the design requirements of the liquid level measurement accuracy of more than 1 mm in the closed vessel within 0.21 m.
【作者单位】：长春理工大学光电信息学院;长春禹衡光学有限公司;
【基金】：国家自然科学基金资助项目(60378019)
【分类号】：TH816
【正文快照】： 0引言在石油、化工等领域常常需要对密闭容器(例如油罐等)中的液体液位进行测量,而国内外传统的液位测量手段大部分是机械式检测[1]。对于液体液位的检测而言,有很多种检测手段,如,人工检尺、浮子液位仪、磁致伸缩液位仪、雷达液位仪、激光液位仪、光纤液位仪以及超声液位仪等

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