Article Sidebar
Published:
Jul 22, 2019Keywords:
Article Details
Open access articles published in the Journal of Agriculture, Science and Technology are under the terms of the Creative Commons Attribution (CC BY) License which permits use, distribution and reproduction in any medium, provided the original work is properly cited. The CC BY license permits commercial and non-commercial re-use of an open-access article, as long as the author is properly attributed.
Copyright on any research article published in the Journal of Agriculture, Science and Technology is retained by the author(s). The authors grant the Journal of Agriculture, Science and Technology with a license to publish the article and identify itself as the original publisher. Authors also grant any third party the right to use the article freely as long as its original authors, citation details and publisher are identified.
Use of the article in whole or in part in any medium requires proper citation as follows:
Title of Article, Names of the Author, Year of Publication, Journal Title, Volume (Issue) and page. Links to the final article on the JSRE website are encouraged.
The Creative Commons Attribution License does not affect any other rights held by authors or third parties in the article, including without limitation the rights of privacy and publicity. Use of the article must not assert or imply, whether implicitly or explicitly, any connection with, endorsement or sponsorship of such use by the author, publisher or any other party associated with the article.
For any reuse or distribution, users must include the copyright notice and make clear to others that the article is made available under a Creative Commons Attribution license, linking to the relevant Creative Commons web page. Users may impose no restrictions on the use of the article other than those imposed by the Creative Commons Attribution license.
To the fullest extent permitted by applicable law, the article is made available as is and without representation or warranties of any kind whether express, implied, statutory or otherwise and including, without limitation, warranties of title, merchantability, fitness for a particular purpose, non-infringement, absence of defects, accuracy, or the presence or absence of errors.
Main Article Content
Entry Alert System for the Deaf Blind Using the Sense of Smell
Abstract
Most common entry alert systems use sound and/or light to give notifications when someone enters through a monitored zone. These systems are however not applicable to people who are deaf and blind, along with the elderly people who are known to suffer greatly from this problem. In this paper, we report on an entry alert system suited to assist persons with aforementioned disability by utilizing the sense of smell. The system consists of a Passive Infrared (PIR) sensor, used to detect motion of an intruder through variations in radiant heat emitted by surrounding objects. An output from a Passive Infrared (PIR) Sensor triggers an Arduino Uno based on a programmable AT Mega 328P-PU microcontroller. A program developed in an Arduino Uno IDE and installed in the Arduino, directs a digital signal to a 5v relay that switches on an actuator element which in turn causes an aerosol to release a scent which can be recognized by the deafblind alerting them of an intruder. The PIR sensor was found to have an output voltage of 3.3V and a maximum detection range of 7 meters. The sensitivity was not affected much under normal working conditions with a change of 0.8 V recorded for temperatures between 15-30OC. The system response time was found to be 0.3m/s at 20OC and 0.5m/s at 29OC for Rose perfume, 0.19m/s at 20OC and 0.25m/s at 29OC for Lavender perfume. These measurements compared well with data from MQ2 gas detector. The findings offer a novel door entry alert system that enhances security and comfort for the deafblind.
