The weekly report discusses progress on using a photo interrupter sensor to count mosquitoes. This week, the student researched photo interrupter sensors, which use an infrared emitter and photodetector to detect objects passing through a slot. There are different types that vary in slot width and depth for detecting different objects. The sensors are widely used for object detection and automatic counting. Next week, the student will design a high performance circuit to count mosquitoes using the photo interrupter sensor for the project.

1. [INC 281 MULTIDISCIPLINARY WORKSHOP WEEKLY REPORT] February 9, 2012
Name-Surname Pongsakorn Srirattanapiwat
Student ID. 53211839
Group Name Habit Thai company
Engineering Team Boon(53211806), Top(53211808), U (53211823),
Members Gank (53211833), Toss (53211841), O (53211846)
Product Design
P’ Pete, P’ Ice
Team Members
Weekly Progress
This week I search about photo interrupter sensor. The Photo Interrupters consist of an
infrared emitter and a phototransistor/photo IC, located face-to-face on the optical axes in a
leaded package. They detect object passing through the slot between the emitter and detector.
There are many kinds photo interrupter in slot width and depth in accordance with detecting
object. The photo Interrupters are simple to use and widely used for object detection and
automatic counting. We use Photo Interrupter sensor for test count mosquitos.
Figure 2.
Figure 1.
Engineering Analysis
Strong Point
- High sensitivity
- High analytic
Week Point
- The object is translucent so the sensor can't sense it.
Next Week Job
- I will think about design high performance circuit in count mosquito for our project.
Department of Control System and Instrumentation Engineering
KING MONGKUT’s UNIVERSITY OF TECHNOLOGY THONBURI