Liquid Level Detection of Syringe Pump and Syringe Based on Machine Vision

Capacity measures are commonly used volume standards for testing measuring systems for liquids other than water. Manual readings from the measuring scale can often be difficult due to the location of the capacity measure or to the nature of the measured liquid. This article focuses on the automation of this procedure by using a single camera machine vision system. A camera positioned perpendicular to the transparent neck captures the image of the liquid meniscus and the measuring scale. The volume reading is determined with the user-defined software in the LabVIEW programming environment, which carries out the image preprocessing, detection of the scale marks and the liquid level, correction of lens distortion and parallax effects and final unit conversions. The realized measuring system for liquid level detection in standard capacity measures is tested and validated by comparing the automated measurement results with those taken by the operators. The results confirm the appropriateness of the presented measuring system for the field of legal metrology.

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Simple, Inexpensive Solid State Liquid Level Detection and Control 1

Agronomy Journal ◽

10.2134/agronj1981.00021962007300010030x ◽

1981 ◽

Vol 73 (1) ◽

pp. 139-140

Author(s):

L. Art Spomer

Keyword(s):

Solid State ◽

Liquid Level ◽

And Control ◽

Liquid Level Detection

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The Hardware Design and Implementation of Liquid Level Detection System for Lead-Acid Battery

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.860-863.2850 ◽

2013 ◽

Vol 860-863 ◽

pp. 2850-2854 ◽

Cited By ~ 1

Author(s):

Ya Jun Bi ◽

Hong Fei Li

Keyword(s):

Detection System ◽

Low Cost ◽

Liquid Level ◽

Lead Acid Battery ◽

Infrared Transmission ◽

Wireless Data ◽

Linear Ccd ◽

Infrared Technology ◽

Liquid Level Detection ◽

Lead Acid

The hardware structure of a liquid level detection system for lead-acid battery was briefly introduced. The system adopts AT89C51 MCU as host module, combined with display storage, extended storage and the watch dog technology. The slave module adopts AT89C2051 MCU, which driver the linear CCD to realize non-contact measurement in acidic and corrosive conditions. The infrared transmission module uses RS-232 serial-to-infrared technology to realize wireless data delivery. The damage due to sensor corrosion could be avoided in this system. Compared with other similar equipments, this system has the advantages of simple structure, small volume, low cost, high measure precision and convenient maintenance.

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