1. PRINCIPLES AND PRACTICES¶
This week I worked on defining my final project idea and started to getting used to the documentation process.
Due to my work circumstances (morning and afternoon work) and personal circumstances (I have a large family, three children) I have to optimize my time very well in order to survive to add the FabAcademy challenge to all this.
I have done a weekly planning that I hope will help me.
This has been my work sequence during this first week:
01/30/2020 I start trying to follow the GIT tutorial and learn how it works. I learn to edit images from GIMP and scale their size so that they are not heavy files and can be used on my website. I try to create my SSH key, and I say “try” because I only think I have succeeded. 01/31/2020 I check that my SSH key exists, and … surprise. There must have been something that I did not do well yesterday. So I start over with this process and finally get it.
02/01/2020 I plan my final project and make a spiral diagram to set the stages to be achieved. I explain what I want to do and what its background and justification are.
02/02/2020 I work online in my repository to update my website with all the information I am generating.
02/03/2020 I start with the documentation work of everything I am doing and I have been writing down in my personal notebook for Fablab. This is also going to be a long process to be able to tell everything that is new to me.
02/04/2020 Until now I have worked on my website online, as of today I do it locally with the help of brackets. And here I document this progress.
My Final Project¶
My initial IDEA¶
“Safety device adaptable to tool machines”¶
The started objective is to develop a sefety device adaptable to tool machines existing in mechanical workshops.
The device will be placed in front of the area of the machine where there is danger of entrapment or cut for the worker, it will work with infrared sensors capable of differentiating between the temperature of the human body and the rest of existing objects in the workshop. So, when a part of the human body invades the danger zone, the safety device will activate the emergency stop of the machine. If my device prototype works correctly, the next level would be to test it on several machines.
Sketch of my Final Project¶
Spiral Model Diagram¶
According to the Regulations for application in Spain, non-portable motor-driven machines must comply with legal requirements detailed in Royal Decree 1644/2008 of October 10, which establishes the “rules for the marketing and commissioning of machines ”, which transposes directive 2006/42 / CE, and Royal Decree 1215/1997, of July 18, which establishes the“ minimum health and safety provisions for the use by workers of work equipment ” . These requirements are necessary to ensure the physical integrity of the workers who use them.
Among the organs and safety elements that include the machines are the stop. Regarding these, in addition to organs for “general stop” and “stop from the workplace”, the machines must have “emergency stop”. The placement of an emergency stop device only makes sense in the event that the stop time it allows to obtain is clearly shorter than that obtained with the normal stop or when access to the normal stop is disabled, which requires a premature detection and effective subsequent braking.
In addition to the previous stop elements, all of manual type, there are others of automatic type. Among these there are various technologies and systems, such as photoelectric cells, ultrasonic sensors, sensitive carpets, etc. They generally consist of a sensor element that detects the presence of a person or part of their body in an area where they should not be and that generate an alarm situation and / or automatic equipment shutdown.
In spite of the systems described above, the number of accidents that occur in this type of machines is still very high, so it is necessary to research and develop these new technologies that help reduce workplace accidents.
The technologies mentioned do not discern between the presence of a part of the human body or materials or objects of the workshop. For this reason I propose for my final work the incorporation of infrared sensors that are capable of making this difference when the danger zone is invaded by a worker.
With my security device I want to prevent things like this from happening:¶
All the videos of entrapment accidents that I found were quite unpleasant. This being a cartoon, is graphic but at least you will not want to leave my website.
It is not necessary to be Gore
What I want to happen is that the machine stops only when the unconscious worker who appears in the video suffers the danger of entrapment.