week 6

Week 6

Title of Activity
-research about sensor.

Objective
- To find a similar project and do some research for example sensor.

Content/Procedure
-Information about the previous project.

Result/Analysis
the result analysis get from week 6.

The system uses a infrared sensor that points directly towards the driver’s face and monitors the driver’s eyes in order to detect fatigue. In such a case when fatigue is detected, a warning signal is issued to alert the driver.

It is the same principle in ALL Infra-Red proximity sensors. The basic idea is to send infra red light through IR-LEDs, which is then reflected by any object in front of the sensor. Then all you have to do is to pick-up the reflected IR light. For detecting the reflected IR light, we are going to use a very original technique: we are going to use another IR-LED, to detect the IR light that was emitted from another led of the exact same type! This is an electrical property of Light Emitting Diodes (LEDs) which is the fact that a led Produce a voltage difference across its leads when it is subjected to light. As if it was a photo-cell, but with much lower output current. In other words, the voltage generated by the leds can't be - in any way - used to generate electrical power from light, It can barely be detected. that's why as you will notice in the schematic, we are going to use a Op-Amp (operational Amplifier) to accurately detect very small voltage changes.

Conclusions
 

From the conclusions in week6

Students knows about the sensor describes how to find the eyes, and also how to determine if the eyes are open or closed. Which was a primary objective of the project. The system deals with using information obtained from the sensor, which narrows the area of where the eyes may exist. Once the face area is found, Taking into account the knowledge that eye regions in the face present great intensity changes Once the eyes are located, sensor will detect in the eye area determine whether the eyes are open or closed.