基于压差式水位传感器的冰层厚度自动监测系统

本自动监测冰厚装置原理,是通过测量冰层底面与冰下水中一固定端之间垂直距离来实现的。该距离是一只浮桶从固定端运动到冰层底面的行程。随浮桶一起运动的压差式水位传感器分别给出浮桶位于固定端和冰层底面的位置,而浮桶的运动则依靠数据采集仪控制浮桶内水泵排吸水改变浮桶的重力来实现,并且该仪器能够记录传感器的信号和设置水泵开关的开、闭时间。为了避免浮桶对冰层厚度变化的影响且浮桶不至于与冰层底面冻结,浮桶只是在测量行程时上浮到冰层底面,其他时间均在固定端位置。文中给出系统的工作原理和现场实测结果的初步分析。

An Automatic Measurement System of Ice Thicknes Based on Water Pressure Sensor

The principle of this kind of automatic ice thickness monitoring system is realized by detecting the vertical distance between the ice bottom and a fixed point in the water, which is measured by using a barrel moving from the fixed point to the ice bottom. A water pressure sensor equipped in the barrel can detect the location of the barrel and the barrel movement is controlled by a pump, which can change the barrel's gravity by sucking or draining water. The instrument can record the sensor signal and set time of the pump switch. In order to avoid the impact of barrel movement and ice freezing on it, only when measuring the location, the barrel floats to the ice bottom and the barrel locates in the fixed point in other time. This paper presents the specific theory of the system and the preliminary data analysis of on-the-spot experiment.