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首页> 外文期刊>Instrumentation and Measurement, IEEE Transactions on >Design of a Flow Transmitter Using an Improved Inductance Bridge Network and Rotameter as Sensor
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Design of a Flow Transmitter Using an Improved Inductance Bridge Network and Rotameter as Sensor

机译：以改进的电感桥网络和转子流量计为传感器的流量变送器的设计

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摘要

A rotameter is a variable area type flow sensor. It is generally used as a local indicator and display unit. Hence, a special technique is needed to transmit and to display the reading of a rotameter at a remote distance. In this paper, an improved inductance bridge-type technique has been developed to convert the float movement of the rotameter into an electrical current signal, which can be transmitted to a remote indicator. A straight ferromagnetic wire attached to the float of the rotameter acts as a sensing element of the proposed rotameter transducer. The movement of the wire as a result of fluid flow variations inside an inductive pickup coil changes the self-inductance of the coil with the changes in flow rate. An improved inductance bridge network has been used to measure the self-inductance of the coil. It has been observed that the variation of the self-inductance of the pickup coil as well as the variation of the transducer and transmitter outputs with flow rate has a very good linearity and repeatability. The necessary theoretical equations, along with the experimental results, are reported in this paper.
机译：转子流量计是可变面积型流量传感器。它通常用作本地指示器和显示单元。因此，需要一种特殊的技术来远距离传输和显示转子流量计的读数。在本文中，已经开发出一种改进的电感桥式技术，以将转子流量计的浮子运动转换成电流信号，该信号可以传输到远程指示器。附在转子流量计的浮子上的直铁磁线充当转子流量计传感器的传感元件。由于流体在感应拾取线圈中的流量变化而引起的运动，随着流量的变化而改变了线圈的自感。改进的电感电桥网络已用于测量线圈的自感。已经观察到，拾波线圈的自感的变化以及换能器和变送器输出随流量的变化具有非常好的线性和可重复性。本文报道了必要的理论方程以及实验结果。

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