The Blind Bag

THE BLIND BAG:

We got this amazing opportunity to showcase our ideas to make life easier in Yelahanka for differently abled citizens. After mapping the area and analysing the situations that arise commonly, the product that we came up with was ‘The Blind Bag.’ . We were able to make or kind of invent the idea to help the blind people by providing a prototype of the product. Our product was noticed by the faculty and the students.

This was our first experience in designing a product, which really taught me how to work in a group and how individual roles are important in creating a functional product such as this one. We learned a lot from this, and were also able to empathise with different kinds of people and have a perspective different than ours. This prototype has fuelled us to do better for the society and we look forward to more of this sort of work.

The diagrammatic design of the product and the the prototype model. 

Arduino Motion Sensor Alarm :

How does it work?

Here, we are using a PIR motion sensor. PIR stands for Passive Infra Red. This motion sensor consists of a fresnel lens, a infrared detector and supporting detection circuitry. The lens on the sensor focuses any infrared radiation present around it towards the infrared detector. Our bodies generate infrared heat and as a result this gets picked up by the motion sensor. The sensor outputs a 5V signal for a period of one minute as soon as it detects the presence of a person. It offers a tentative range of detection of about 6-7 m and is highly sensitive.

Working of a PIR motion sensor

When the PIR motion sensor detects a person, it outputs a 5V signal to arduino. Thus, an interruption on the arduino is triggered. We define what the arduino should do, as it detects an intruder. Here, we are creating an alarm sound through a piezo buzzer/an ear plug. Therefore, when the sensor detects an intruder, an alarm sound will get triggered through the buzzer.

The piezo buzzer or an earplug is activated through the arduino using PWM signals which is attached to the chest piece.

The product we are  planning is for the blind people which will use this basic technology which will enable them to be more aware of the surroundings and not get into accidents.

Materials used :

Bag, Arduino board, connecting wires, motion sensor, earplugs, box, cloth pieces, velcro strips, sewing thread and needle, pvc pipes, metal rods, elastic bands.

Sources: YouTube, Wikipedia, general Google.