Fabrication of Automated Hydrostatic Pressure-Based Densitometer with a Calibrated Pressure Sensor

Sci Pub Date : 2024-07-18 DOI:10.3390/sci6030041

D. Jayakantha, K. Gamage, Navaratne Bandara, Migara Karunarathne, Madushani Seneviratne, E. Comini, D. Zappa, Nanda Gunawardhana

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引用次数: 0

Abstract

An automated device is designed to measure the density of a liquid material using hydrostatic pressure method. A low cost pressure sensor is calibrated and used to get highly accurate readings. The calibration is done by measuring the pressure values vs. the generated voltage signal. The calibration has been challenging due to the low accuracy of the sensor but proved to be highly effective in applications. The interface is developed using a microcontroller, motor drives, analog to digital converters and sensors. The device is designed to get several readings automatically by changing the positions of the device/liquid column heights to increase the accuracy. Also the device can be programmed to measure the real time density of a liquid continuously. The readings were analyzed and averaged by a software developed in python language. The instruments accuracy was tested against 3 liquid types, water, coconut oil, kerosene oil, and showed a low error (0.007%, 0.001%, and 0.002% respectively) compared to the readings of a standard Pycnometer. The low error percentages confirm the accuracy of the device and the effectiveness of the sensor calibrations.

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利用校准压力传感器制造基于静水压力的自动密度计

设计了一种自动装置，利用静水压力法测量液体材料的密度。低成本的压力传感器经过校准后可获得高精度读数。校准是通过测量压力值与产生的电压信号来完成的。由于传感器的精度较低，校准工作具有挑战性，但在应用中证明非常有效。接口的开发使用了微控制器、电机驱动器、模数转换器和传感器。该设备可通过改变设备位置/液柱高度自动获得多个读数，以提高精确度。此外，还可对该装置进行编程，以连续测量液体的实时密度。用 python 语言开发的软件对读数进行分析和平均。该仪器对水、椰子油和煤油这三种液体进行了精确度测试，结果显示，与标准毕氏密度计的读数相比，误差很小（分别为 0.007%、0.001% 和 0.002%）。低误差率证实了该装置的准确性和传感器校准的有效性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Sci

CiteScore

4.50

自引率

0.00%

发文量