Low-Power and High Precision Sensing Circuit for a Three-Channel Electrochemical Sensor

A discrete, compact, low-power sensor readout circuit that can simultaneously handle two current measurements, and one voltage measurement. This work provides a compact, low-power sensor architecture, with the intent for the serial readout to be replaced with a low-power radio frequency transmitter for continuous monitoring. The proposed circuit is highly precise with an average current draw of 21 micro amps for a sampling frequency of once per minute. The target application is livestock health monitoring, which would be done by placing the sensor and circuit inside of a cow's rumen to monitor changes in pH, lactate, and VFA levels to catch metabolic disease early.

Name thesis:degree_name

Master of Science

Level thesis:degree_level

masters

Discipline thesis:degree_discipline

Electrical Engineering

Department dc:contributor.department

Electrical Engineering

Grantor dc:publisher

Virginia Tech

Year dc:date.issued

2024

Author dc:creator

• Longest, Dylan Henry

Chair dc:contributor.committeechair

• Ha, Dong S.

Committee members dc:contributor.committeemember

• Jia, Xiaoting
• Walling, Jeffrey Sean

• Compact
• Low Power
• PCB
• Precise
• Sensor Readout

Statement dc:rights

• In Copyright

Licence dc:rights.uri

• http://rightsstatements.org/vocab/InC/1.0/

Language dc:language.iso

en

Dc Identifier Other

vt_gsexam:40665

OAI identifier oai:identifier

oai:vtechworks.lib.vt.edu:10919/119215