CoAutomation Inc., (logo) CoAutomation designs
Electronics and Firmware for
Intelligent Sensing and Control
 Home   Contact Us 

CoAutomation Projects

Fluid-level Sensing using Capacitance

Developed For: InsCap
Key Technologies:
Microprocessor: MSP430F2111
Communications: serial


The Problem: 
Create firmware that would determine the level of fluid in a gasoline tank by monitoring the change in capacitance of multiple "sensing pads".

The Solution: 
CoAutomation created code for the MSP430 using the unique capabilities of the Comparator to transfer charge from one capacitor to another and to measure change by triggering a TimerA capture. Fluid sensing accuracy increased by using a multi-segmented capacitor and a proprietary technique for incresing the accuracy of the individual segments. Device establishes level of fluid and then transmits data over serial connection. Debug mode allows device to send data supporting level calculations.







 CoAutomation, Inc.   11 Woodcrest Rd.   Westborough, MA 01581   508-366-9552  info@CoAutomation.com  
Copyright ©2010-2011 CoAutomation Inc., all rights reserved.