In this paper, an anemometric type flow meter has been designed and developed using a transistor as a flow sensor. The heat is dissipated from the surface of the p–n diode created by short circuiting the emitter and base terminal of the transistor CL100B causing the drop in the temperature with respect to the fluid velocity and it is utilized to measure the flow rate of the fluid across the pipeline section. Two identical sets of transistor acting like p–n diodes are used, the first diode senses the fluid velocity and produces an inconstant voltage and the other is in contact with the stagnated fluid produces a constant voltage. In this paper, the temperature effect is easily compensated by taking the difference in the output of diodes. The difference between the output voltages of the identical transducer only depends on the flow rate. The transducer design and its theoretical characteristic equation and graphs have been derived and discussed in this paper. The proposed transducer has a low cost with good linearity, accuracy, and repeatability.

在本文中，设计和开发了一种使用晶体管作为流量传感器的风速型流量计。通过短路晶体管 CL100B 的发射极和基极端子产生的 p-n 二极管表面散发热量，导致温度相对于流体速度下降，并用于测量流体的流速穿过管道部分。使用两组相同的晶体管，其作用类似于 p-n 二极管，第一个二极管感应流体速度并产生不稳定的电压，另一组与停滞的流体接触产生恒定电压。在本文中，温度效应很容易通过取二极管输出的差异来补偿。同一传感器的输出电压之间的差异仅取决于流速。本文推导和讨论了换能器设计及其理论特性方程和图表。所提出的传感器成本低，具有良好的线性、准确度和可重复性。