Design of automatic water level measuring instrument IoT based on open pan evaporimeter

THE 2ND INTERNATIONAL CONFERENCE ON PHYSICAL INSTRUMENTATION AND ADVANCED MATERIALS 2019 Pub Date : 2020-12-09 DOI:10.1063/5.0034950

K. Ain, A. Rahmatillah, Virgilius Rivan Seran

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Abstract

The loT based automatic evaporation measuring instrument was designed in this research to replace the conventional measuring instrument, hook gauge and stilling well. This measuring instrument was composed of two components, namely NodeMCU microcontroller and infrared distance sensor. The measurement data is stored and displayed on the ThingSpeak website. To know the performance of the measuring instrument, conducted several tests. They are resolution tests, accuracy tests, short and long term stability test, and wireless communication between the instrument and server test. Based on the test result, obtained the resolution of the instrument was 2 mm, the accuracy has obtained the error of 2.34 mm by using the regression method and 0.34 mm by using a look-up table and interpolation method. The short stability reached above 95%. The standard deviation of the long term stability test was 0.157 mm, measured as much 100 times for 100 hours. Therefore, the measuring instrument successfully connects to the server and is able to send data properly.

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基于开式蒸发器的自动水位测量仪IoT的设计

本研究设计了一种基于loT的蒸发自动测量仪，以取代传统的测量仪、钩式压力表和静井。该测量仪由NodeMCU单片机和红外距离传感器两部分组成。测量数据被存储并显示在ThingSpeak网站上。为了解测量仪器的性能，进行了多次测试。它们是分辨率测试、精度测试、短期和长期稳定性测试以及仪器与服务器之间的无线通信测试。根据测试结果，得到仪器的分辨率为2 mm，采用回归法得到精度误差为2.34 mm，采用查表法和插值法得到精度误差为0.34 mm。短期稳定性达95%以上。长期稳定性试验的标准偏差为0.157 mm, 100小时测量100次。因此，测量仪器能够成功连接到服务器，并能够正常发送数据。

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THE 2ND INTERNATIONAL CONFERENCE ON PHYSICAL INSTRUMENTATION AND ADVANCED MATERIALS 2019

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