Department of Electrical Engineering, Faculty of Engineering Technology, Al Balqa Applied University, Al Salt 19117, Jordan.
Department of Mechatronics Engineering, Faculty of Engineering Technology, Al Balqa Applied University, Al Salt 19117, Jordan.
Sensors (Basel). 2023 Jan 12;23(2):884. doi: 10.3390/s23020884.
Temperature transducers are commonly used to monitor process parameters that are controlled by various types of industrial controllers. The purpose of this study is to design and model a simple microcontroller-based acoustic temperature transducer based on the variations of resonance conditions in a cylindrical resonance tube. The transducer's operation is based on the generation of an acoustic standing wave in the free resonance mode of generation within a cylindrical resonance tube which is converted into a train of pulses using Schmitt trigger circuit. The frequency of the generated standing wave (i.e., the train of pulses) is measured by the Arduino Uno microcontroller, where a digital pin is used to acquire pulses that are counted using a build-in software function in an Arduino IDE environment. Experimental results are performed for three sizes of diameters to investigate the effect of the diameter of resonance tube on the obtained results. The maximum nonlinearity error according to Full-Scale Deflection (FSD) is about 2.3 percent, and the relative error of the transducer is evaluated using experimental findings and the regression model. The circuit simplicity and design of the suggested transducer, as well as the linearity of its measurements, are notable.
温度传感器常用于监测各种类型工业控制器控制的过程参数。本研究旨在设计和建模一种基于圆柱谐振管谐振条件变化的简单基于微控制器的声温度传感器。该传感器的工作原理是基于在圆柱谐振管的自由谐振模式下产生声驻波，然后使用施密特触发器电路将其转换为脉冲序列。生成的驻波（即脉冲序列）的频率由Arduino Uno 微控制器测量，其中一个数字引脚用于采集脉冲，并在 Arduino IDE 环境中使用内置软件功能进行计数。进行了三种直径的实验结果，以研究谐振管直径对获得结果的影响。根据满量程偏转（FSD）的最大非线性误差约为 2.3%，并使用实验结果和回归模型评估了传感器的相对误差。该传感器的电路简单且设计合理，测量线性度良好。
