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Authors
Abstract(s)
O álcool é um dos principais constituintes de bebidas alcoólicas e, seguramente, é a droga de abuso mais antiga de entre as conhecidas atualmente. Esta substância é uma das causas mais comuns de acidentes rodoviários e estes por sua vez têm-se tornado, no decorrer dos anos, uma questão de saúde pública.
O tema proposto tem por objetivo a criação de um dispositivo portátil não invasivo destinado à deteção em tempo real da concentração de álcool no sangue através do suor. Este dispositivo é constituído essencialmente por dois componentes primordiais: um biossensor amperométrico, que promove, recolhe e analisa uma amostra de suor, e a componente da cadeia de aquisição de dados e processamento, que faz a aquisição e conversão analógica/digital dos dados do biossensor e posterior processamento digital dos resultados. O suor é promovido aplicando a técnica de iontoforese. O objetivo reside em que o utilizador assim que comece a ingerir álcool, ligue o dispositivo de modo que as medições, executadas a cada 5 minutos, lhe permitam saber em tempo real e em qualquer lugar, quais os seus níveis de alcoolémia. O público-alvo deste estudo são os condutores profissionais, pois apesar da profissão incorrer em maior experiência de condução e responsabilidade, são o grupo onde a probabilidade de ocorrência de acidentes por efeito do álcool é mais elevada face ao número de horas ao volante. O dispositivo foi projetado para ser usado como um relógio de pulso, pois também oferece essa funcionalidade para manter a descrição da monitorização da concentração de álcool no sangue.
Todo o processo de promoção do suor na pele do utilizador foi apenas estudado teoricamente, não tendo sindo um processo implementado no protótipo final. O utilizador é informado que o valor de alcoolémia está a aumentar com um sinal luminoso e sonoro, podendo visualizar no LCD do dispositivo o valor da concentração de álcool no sangue em g/l, pela pressão de um botão. Pretende-se que este protótipo possa servir como mais uma medida para consciencialização dos condutores para os efeitos nefastos da condução sob o efeito de álcool, assim como um meio de redução dos acidentes de viação daí decorrentes.
Alcohol is one of the main constituents of alcoholic beverages and, surely, is the drug of abuse among the oldest currently known. This substance is one of the most common causes of traffic accidents and these in turn have become, over the years, a public health issue. The theme aims to create a portable non-invasive device intended for real-time detection of alcohol concentration in the blood through sweat. This device consists essentially of two primary components: an amperometric biosensor, which promotes, collects and analyses a sample of sweat, and the component of the data acquisition and processing system, which makes the acquisition and analogue-to-digital conversion of the bio-data and subsequent digital processing of the results. Sweat is promoted by applying the iontophoresis technique. As soon as the user starts to ingest alcohol, he/she will turn the device to perform measurements every 5 minutes, to know in real time and in any place, which are his/her alcohol levels. The target audience of this study are professional drivers, because despite the profession incur in greater driving experience and responsibility, this is the group where the probability of accidents by effect of alcohol is higher compared to the number of hours driving. The device is designed to be used as a wrist watch, because it also offers this functionality to keep a discrete monitoring of the concentration of alcohol in the blood. The whole process of promotion of sweat on the skin of the user was only studied theoretically. It has not been implemented in the final prototype. The user is informed that the value of alcohol is increasing by luminous and audible signal, and the LCD of the device can show the value of alcohol concentration in the blood expressed in g/l, by pushing a button. It is intended that this prototype can additionally serve as a measure to drivers' awareness to the adverse effects of driving under the influence of alcohol, as well as a means of reducing traffic accidents.
Alcohol is one of the main constituents of alcoholic beverages and, surely, is the drug of abuse among the oldest currently known. This substance is one of the most common causes of traffic accidents and these in turn have become, over the years, a public health issue. The theme aims to create a portable non-invasive device intended for real-time detection of alcohol concentration in the blood through sweat. This device consists essentially of two primary components: an amperometric biosensor, which promotes, collects and analyses a sample of sweat, and the component of the data acquisition and processing system, which makes the acquisition and analogue-to-digital conversion of the bio-data and subsequent digital processing of the results. Sweat is promoted by applying the iontophoresis technique. As soon as the user starts to ingest alcohol, he/she will turn the device to perform measurements every 5 minutes, to know in real time and in any place, which are his/her alcohol levels. The target audience of this study are professional drivers, because despite the profession incur in greater driving experience and responsibility, this is the group where the probability of accidents by effect of alcohol is higher compared to the number of hours driving. The device is designed to be used as a wrist watch, because it also offers this functionality to keep a discrete monitoring of the concentration of alcohol in the blood. The whole process of promotion of sweat on the skin of the user was only studied theoretically. It has not been implemented in the final prototype. The user is informed that the value of alcohol is increasing by luminous and audible signal, and the LCD of the device can show the value of alcohol concentration in the blood expressed in g/l, by pushing a button. It is intended that this prototype can additionally serve as a measure to drivers' awareness to the adverse effects of driving under the influence of alcohol, as well as a means of reducing traffic accidents.
Description
Keywords
Biossensor Amperométrico Concentração de Álcool Dispositivo de Monitorização Eletroquímica Iontoforese Msp430fg4618 Não Invasivo Portátil Potencióstato