Abstract: To achieve intelligent liquid measurement and improve the measurement accuracy and reliability of the system, two differential pressure capacitive sensors are used to obtain the density and liquid level of the liquid in the container, reducing or eliminating measurement errors caused by density changes. The outputs of the two differential pressure sensors are input to a microcontroller for data processing after C/U conversion and A/D conversion, displaying the density, liquid level, and volume of the liquid in the container. The system realizes automatic acquisition of measurement data and multi-parameter measurement.
Keywords: dual differential pressure method; capacitive differential pressure sensor; liquid level; density; storage capacity
An intelligent measurement system for saving liquid based on capacitance sensor Wang Yanju,Wang Xinian,Wang Yutian
Abstract: In order to realize liquor intelligent measurement, to advance the measuring precision and the reliability of the system, two differential pressure sensors are used to obtain the density and liquid height of the liquid in the container, and the error caused by changeable density is improved or eliminated. The output of the sensors is converted by C/U conversion circuit, and by A/D changing, being sent to computer. After data processing, the liquor density, height and reserves data are shown. The system can realize the automated data collection and multi-parameter.
Key words: Double-difference pressure; Capacitive differential pressure sensor; liquid level; density; reserves
0 Introduction
In the storage, transfer, and handover of various liquids in industries such as petrochemicals and food, automated liquid measurement technology and modern management methods are receiving increasing attention. Due to various reasons, most enterprises in my country are still operating manually, requiring numerous staff members to perform large amounts of data collection and calculations daily. This situation is highly inconsistent with the modernization trend of metrology development, and too many human factors affect the accuracy and reliability of measurements. Therefore, many researchers have made unremitting efforts in this area over the years. This paper designs an intelligent liquid measurement system based on dual differential pressure sensing elements. The system uses two capacitive differential pressure sensors as detection elements to detect the liquid density and liquid level, respectively. C/U and A/D conversion circuits are designed, and a microcontroller processes the data, enabling the measurement system to achieve intelligence, digitalization, and high precision. The use of dual differential pressure sensors reduces or eliminates the errors in liquid level measurement caused by changes in liquid density due to external environmental variations.
For details, please click: Intelligent Liquid Storage Measurement System Based on Capacitive Sensor
