week 17
Assignment: Propose a final project that integrates the range of units covered, answering:
-  What will it do?, Who's done what beforehand?, What materials and components will be required?,
     Where will they come from?, How much will it cost?, What parts and systems will be made?,
     What processes will be used?, What tasks need to be completed?, What questions need to be      
     answered?, What is the schedule?, How will it be evaluated?.
Projects can be separate or joint, but need to show individual mastery of the range of skills covered   where possible, you should make rather than buy the parts of your project.
Applications & Implications.
Guillermo Jaramillo :: Fab Academy 2017
Fab Academy 2017
A little history.

Initially I thought of making an intercommunication system that would allow female pastors who are in a state of gestation and who are miles away from their homes, asking for help when the time comes for delivery. This system was composed of a system of receiver emitter, which in addition to serving as an aid request serve as a system of music reproduction and a flashlight for the night.

The system would be powered by a battery that would provide power and a solar cell system. As antenna would use an arrangement of type yagui hung of poles in the outside part of the stay.
Regarding this project of high social impact, I chose to leave it for this time as the necessary electronics for it is not within the applicable within the Fab Academy. This project will be in reserve for exhibition in the Fab 14.

What will it do?
A few months ago in the masters classes, I had a teacher of the course of Learning Psychology who was blind. He is a doctor in Psychology and he called me much his experience that despite being blind he was able to study not only high school but university, master's and doctorate.

Based on his experience, I talked to him and went to find out the day to day of a blind person. My final project is to design a system that allows a blind person to mobilize better in an environment both at home and abroad regardless of whether it is day or night.

Back to Home
In order to help a blind person to walk in a straight line, there is no previous work or help when they are identified by lights.

What materials and components will be required?

In order to construct the cane the following components are required:
01 IR sensor. U $ 2.00
01 ultrasonic sensor. $ 1.8
01 Atmel 328P microcontroller card. (Satshakit) U $ 8.00
01 cell phone vibrator system for tactile warning. $ 1.0
01 card with buzzer for listening output. $ 1.10
01 LED strip for visual indicators U $ 2.00
01 light sensor. $ 1.2
01 accelerometer sensor to indicate the position of the cane. $ 1.10
01 battery power system. $ 1.0

The materials for the cane are:
01 ABS plastic head $ 2.50
01 composite body of two parts. $ 3.0
03 ABS plastic grip systems. $ 1.5
01 ABS plastic handle handle. U $ 2.50

For the vest you need:
01 futuristic design vest. $ 4.0
01 LED strip for visual indicators. $ 4.0
01 accelerometer sensor to indicate driving in a straight line. $ 1.1
01 light sensor. $ 1.2
01 Atmel 328P microcontroller card. US $ 8.0
01 battery power system. $ 1.0

Where will they come from?

Most materials will be taken from the Fab Lab inventory.

How much will it cost?

The approximate cost of the staff is thirty dollars. The cost of the vest is $ 20.

What parts and systems will be made?

The parts to be made are divided into three groups:
-The electronics, which is subdivided into two groups: the electronics to be made from scratch and the electronics to be used as some sensors.
- Printable parts in ABS plastic.
- The parts to be made in composite resin.

What processes will be used?

The processes to be used are conceptual and theoretical design, prototype part mechanical - electronic, software testing and integration, ergonomics testing, digital and manual manufacturing, assembly, field testing and documentation .

What tasks must be completed?

The tasks that must be completed are those that are part of the design, testing, programming, ergonomics, manufacturing, assembly and documentation tasks.

What questions do you have to answer?

The issues to be resolved are the assembly of the parts, to take care of the precision and the finish. Another aspect to solve is the programming of electronics. A next aspect is the design and integration of electronics. Also the integration of the calibration mechanisms of the sensors.

What is the calendar?
This consists of a walking stick that helps to detect unevenness of the floor on the Z axis and helps to find obstacles in the XY plane. In addition, it consists of an accelerometer that indicates to the blind, at the time that the stick falls, where the stick is, through a hearing aid.

In addition the stick will have visual indicators for when the blind man goes out at night, can be seen by people who come in the opposite direction. This in a scenario where outdoor artificial light is not abundant as in some non-commercial streets.

Another aspect that is covered is the making of a vest with two purposes. First is to tell the blind man if he is walking in a straight direction or not, it seems easy but having no eyes does not have a reference system and is very complicated. Imagine walking in a space like a circular lobby without a visual reference system with all the decoration not distributed in a linear and predictable way, like panels and pots with plants.

Another aspect is while the blind person is accustomed to a new environment, while mapping in his memory, where are the rooms or locations, the vest would alert audibly when you turn right or left.
The second operation is that when you go out at night, you would be able to emit a luminous warning to indicate your special condition in areas where the lighting is not abundant and allows you to be seen.

Who has done what beforehand?

There are many work done beforehand however only cover part of the problem to be solved such as the use of infrared for detection. Here are two papers where the papers have been published:

https://www.hindawi.com/journals/apec/2013/726480/
http://eprints.utem.edu.my/5632/

Regarding the use of ultrasound as a method of detection of obstacles and their uses in devices for the blind, there is also abundant literature, such as:

https://www.ultracane.com/about_the_ultracane
http://nevonprojects.com/ultrasonic-blind-walking-stick-project/


However neither integrates the two methods: detection of unevenness in the Z axis and detection of obstacles in the XY plane. From this lack arises my idea for the final project.

For example here is a video that shows a commercial product and its concept.



How will it be evaluated?

I believe that the aspects to be evaluated are relevance, inclusion and social impact, creativity, level of integration, aspects of STEM covered, the number of Fab Academy units covered in the project.

The units covered in the project are:
Principles and practices, project management
Computer-aided design
Computer-controlled cutting
Electronics production
3D scanning and printing
Electronics design
Computer-controlled machining
Embedded programming
Output devices
Machine design
Input devices
Composites