Thanathon Samano 53211816

1. [INC 281 MULTIDISCIPLINARY WORKSHOP WEEKLY REPORT] March 7, 2012
Name-Surname Thanathon Samano
Student ID. 53211816
Group Name Instinct
M 53211801
Engineering Team Boss 53211808
Members Yui 53211835
Ball 53211836
Product Design P’Juk
Team Members P’Ploy
Weekly Progress
In this weekly, we are change sensor for detect food from pH-sensor to CO2-sensor because pH-
sensor that using is complex example It must calibrate with buffer before using. From below picture you
will see format of product by circuit will control opening-closing of valve. Process of detect CO2 will use
time about 15 minute. Output of CO2-sensor is mv unit. After that sent output to expansion circuit, then
sent to comparator next sent to logic process and the last sent to display result to show status of food.
.
Figure 1. Carbon sensor and circuit. Figure 2. Format of product.
Engineering Analysis
Strong Point
- Easy to design circuit that use for detect.
Week Point
- CO2-sensor has high resolution but CO2 that changing is very low so it can detect when the food is very
spoiled only.
Next Week Job
- I will go to lab of environment engineer for request to use CO2-machine to measure CO2 in spoiled food
and use this data to design. And talk about other function.
Department of Control System and Instrumentation Engineering
KING MONGKUT’s UNIVERSITY OF TECHNOLOGY THONBURI