Real-Time System for Liquid Level Measurement

2013 ◽  
Vol 441 ◽  
pp. 356-359
Author(s):  
Wei Wei ◽  
Hai Ying Jiang ◽  
Qin Jian Sun ◽  
Qiang Huang ◽  
Zhi Wei Wang
Keyword(s):  
Harmonic Oscillation ◽  
High Sensitivity ◽  
Capacitive Sensor ◽  
Liquid Level ◽  
Capacitance Measurement ◽  
Measurement Circuit ◽  
Real Time System ◽  
Level Measurement ◽  
Sensor Structure ◽  
Level Height

A small level measurement system is designed by installing a compact capacitive level sensor in the small container. By analyzing the capacitive sensor structure, a sensor measurement circuit is designed with high sensitivity, measuring stability and good repeatability. Capacitance measurement circuit makes use of multiple harmonic oscillation principle. The microcomputer measures the oscillation frequency of the multivibrator, and calculates the liquid level height based on the monotonic function about the liquid level height and frequency.

scholarly journals Design and Characteristic Analysis of Cross-Capacitance Fuel-Level Sensor

Sensors ◽  
2018 ◽  
Vol 18 (11) ◽  
pp. 3984 ◽  
Author(s):  
Jing Yu ◽  
Hang Yu ◽  
Dongsheng Li
Keyword(s):  
Capacitive Sensor ◽  
Measurement Model ◽  
Liquid Level ◽  
Characteristic Analysis ◽  
Single Tube ◽  
Level Measurement ◽  
Repeatability Error ◽  
Level Sensor ◽  
Fuel Level ◽  
Liquid Level Sensor

A cross-capacitance liquid level sensor is based on the principle of cross capacitance. This study designed a new single-tube cross-capacitance fuel-level sensor. The fuel-level measurement model is established for a single-tube cross-capacitive sensor, and the relationship between the measured liquid level and sensor output capacitance is derived. The characteristics of the sensor were tested experimentally. The experimental results demonstrate that the linearity error of the liquid-level sensor of the single-tube calculation for the spacecraft is ±0.48%, the repeatability error is ±0.47%, and the hysteresis error is ±0.68%. The cross-capacitive fuel-level sensor developed in this study can be used in the fuel tank of spacecrafts owing to its low weight and high precision.

The Design of Liquid Level Detection System for Oil Tank

2011 ◽  
Vol 130-134 ◽  
pp. 2443-2446
Author(s):  
Ai Ping Wu ◽  
He Ping Pan ◽  
Yong Hua Li
Keyword(s):  
Detection System ◽  
Capacitive Sensor ◽  
Logic Circuit ◽  
Liquid Level ◽  
Level Measurement ◽  
Liquid Level Measurement ◽  
Oil Tank ◽  
Processing Circuit ◽  
Easy Operation ◽  
Liquid Level Detection

The basic principle of liquid level measurement with capacitive sensor is described. According to differences in dielectric constant between oil and water, a liquid level detection system for oil tank is designed. The system includes capacitive sensor, signal processing circuit, FPGA logic circuit and the software of computer. Results show that the system has characteristics of easy operation, high precision. It can detect the change of liquid level accurately and effectively.

scholarly journals Novel Design and Fabrication of High Sensitivity MEMS Capacitive Sensor Array for Fingerprint Imaging

2009 ◽  
Vol 74 ◽  
pp. 239-242 ◽  
Author(s):  
Mitra Damghanian ◽  
Burhanuddin Yeop Majlis
Keyword(s):  
Pressure Sensor ◽  
Sensor Array ◽  
Fem Analysis ◽  
High Sensitivity ◽  
Capacitive Sensor ◽  
Capacitive Pressure Sensor ◽  
Structural Modifications ◽  
Enhanced Sensitivity ◽  
Sensor Structure ◽  
Novel Design

A novel MEMS capacitive pressure sensor array is designed and fabricated for fingerprint acquisition application. Based on analytical investigations and FEM analysis, the designed structure of pressure sensor cells assist from an aluminum clamped-clamped wide beam as the movable electrode of variant capacitor, instead of usual membrane structure. A rectangular base T-shape protrusion is also used on top of the deflecting electrode to concentrate pressure and increase the sensitivity. Proven by the real test of the fabricated sensor structure, this design has enhanced sensitivity and linearity of the device compared to all membrane based reported prototypes without crossing the dpi limits. Structural modifications have resulted in a simpler fabrication process as well.

scholarly journals The Capacitive Sensor for Liquid Level Measurement Made with Ink-jet Printing Technology

2015 ◽  
Vol 120 ◽  
pp. 731-735 ◽  
Author(s):  
Daniel Paczesny ◽  
Grzegorz Tarapata ◽  
Marzęcki Michał ◽  
Ryszard Jachowicz
Keyword(s):  
Capacitive Sensor ◽  
Liquid Level ◽  
Printing Technology ◽  
Ink Jet Printing ◽  
Level Measurement ◽  
Ink Jet ◽  
Liquid Level Measurement ◽  
Jet Printing

The capacitive sensor for liquid level measurement, fabricated with the inkjet printing technology

2016 ◽  
Author(s):  
Daniel Paczesny ◽  
Grzegorz Tarapata ◽  
Michał Marzęcki ◽  
Michał Woyke ◽  
Ryszard Jachowicz
Keyword(s):  
Inkjet Printing ◽  
Capacitive Sensor ◽  
Liquid Level ◽  
Printing Technology ◽  
Level Measurement ◽  
Liquid Level Measurement ◽  
Inkjet Printing Technology
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