Automatic human activity recognition is an area of interest for developing health, security, and ... more Automatic human activity recognition is an area of interest for developing health, security, and sports applications. Currently, it is necessary to develop methods that facilitate the training process and reduce the costs of this process. This paper explores a methodology to classify human physical activities in a semi-supervised paradigm. With this approach, it is possible to reduce the number of labels necessary to train the learning model and the complexity of this process. This process begins by deducting the number of micro-movements or sub-movements where the data should be grouped and assigning the label through a clustering technique. We perform this procedure for a specific group of micro-movements whose label is unknown. Later, the classification process starts by using two methods, a Support Vector Machine (SVM) that identifies the micro-movements and a Markov Hidden Model that detects the human physical activity as a function of sequences. The results show that with a pe...
Automatic human activity recognition is an area of interest for developing health, security, and ... more Automatic human activity recognition is an area of interest for developing health, security, and sports applications. Currently, it is necessary to develop methods that facilitate the training process and reduce the costs of this process. This paper explores a methodology to classify human physical activities in a semi-supervised paradigm. With this approach, it is possible to reduce the number of labels necessary to train the learning model and the complexity of this process. This process begins by deducting the number of micro-movements or sub-movements where the data should be grouped and assigning the label through a clustering technique. We perform this procedure for a specific group of micro-movements whose label is unknown. Later, the classification process starts by using two methods, a Support Vector Machine (SVM) that identifies the micro-movements and a Markov Hidden Model that detects the human physical activity as a function of sequences. The results show that with a pe...
Automatic recognition of human activities is an important task in computer vision applications. R... more Automatic recognition of human activities is an important task in computer vision applications. Robust approaches using one or more sensors generally link redundant features that consume computing resources and computation time during the sub-activity classification process. This article explores dimension reduction for recognizing human activities and primitive movements by merging data from Kinect visual depth sensors, IMUs inertial sensors, and electrodes of electromyographic record (EMGs). It shows a comparative study where the different techniques of reduction of state of the art are evaluated characteristics; behavior is analyzed based on performance in recognition of activities and computation time of the methods under study. The results show that state-of-the-art methodologies could have a lower temporary cost when implementing them without significantly affecting performance when recognizing the activity.
Los sistemas de instrumentación y medida han sido desarrollados con el propósito de monitorear, s... more Los sistemas de instrumentación y medida han sido desarrollados con el propósito de monitorear, supervisar y controlar sistemas físicos. Estos sistemas físicos pueden llegar a ser muy simples (como por ejemplo medir temperatura) o por el contrario muy complejos (control de un sistema de producción industrial) donde es necesario desarrollar un sistema de medida robusto y flexible que esté en la capacidad de operar en un ambiente altamente contaminado. Una de las etapas fundamentales de los sistemas de instrumentación y medida es el sensor, el cual, es el elemento que convierte la información del mundo físico (caudal, velocidad, aceleración, presión etc) en una señal eléctrica. Por lo tanto, al supervisar, monitorear o controlar fenómenos físicos, la selección de las mejores ubicaciones de medición es una tarea imprescindible. Debido a que la red de sensores a instalarse debe ser informativa y económica. Básicamente una red de sensores se puede implementar de dos maneras. La primera e...
Electric arc furnaces provide a relatively simple way for melting metals. They are used in the pr... more Electric arc furnaces provide a relatively simple way for melting metals. They are used in the production of highly purified steel, aluminium, copper and other metals. However, they are considered the most damaging load for electrical power systems. It is very important, therefore, to have arc furnace models that can determine the behavior of this type of load with a high degree of accuracy. In this way, it would be possible to assess the impact in terms of power quality indices for the power system to which they are connected. When using electric arc furnace models in practice, a key issue is the calibration of the model’s parameters. In this paper, we show a procedure for calibrating all the parameters of an AC electric arc furnace model using real measurements of voltages and currents. A multilayer neural network is used as an emulator of the electric arc furnace model. The neural network is trained using data obtained from the simulation of the electric arc furnace model impleme...
La comunicación entre pacientes y el personal médico es una tarea imprescindible para el buen fun... more La comunicación entre pacientes y el personal médico es una tarea imprescindible para el buen funcionamiento de hospitales y/o clínicas. Para ello, los centros de salud cuentan con intercomunicadores (pequeña central telefónica), estos equipos cumplen con una variedad de funciones que permiten potencializar la comunicación dentro de los centros hospitalarios. Sin embargo, la solicitud de servicio por parte del paciente debe estar disponible al público en general con el propósito de mejorar la calidad del servicio. En este documento se describe un sistema de instrumentación y medida que permite informar al público en general, que habitación solicita el servicio a la enfermería en un hospital. El sistema utiliza una central telefónica que envía las llamadas a un microcontrolador, el cual, procesa la información para finalmente mostrarla en un indicador luminoso (display). El sistema posee ventajas como sencillez, fácil instalación, bajo costo, que lo hacen adaptable a aplicaciones sim...
We present a local monitoring system of temperature and caudal in a pig farm. The method consists... more We present a local monitoring system of temperature and caudal in a pig farm. The method consists of designing an instrumentation and measurement system, this uses a wireless sensor network (WSN) based on the ZigBee standard. The WSN sends the gathered data to a server that stores the information in a database with the purpose of consulting (local queries) at any time the data that have been measured by the electronic devices. The preliminary results show that the data we can be used to infer behavior of the variables under study, besides the prototype is scalable, efficient, that makes it easily adaptable to any pig farm.
Electric arc furnace provides a relatively simple way for melting metals. They are used in the pr... more Electric arc furnace provides a relatively simple way for melting metals. They are used in the production of highly purified steel, aluminium, copper and other metals. However, they are considered the more damaging load for the power system. It is very important, therefore, to count on arc furnace models for determining with high degree of accuracy the performance of this type of load. In this way, it would be possible to assess the impact in terms of power quality indices for the power system to which they might be connected. When using electric arc furnace models in practice, a key issue is the calibration of the parameters of the model. In this paper, we show a procedure for calibrating all the parameters of an AC electric arc furnace model using real measurements of voltages and currents. It uses a multilayer neural network as an emulator of the electric arc furnace model. The neural network is trained using data obtained from the simulation 1 Ingeniero eléctrico. Magíster en In...
En este artículo se presenta el procedimiento de validación de un prototipo electrónico de fertir... more En este artículo se presenta el procedimiento de validación de un prototipo electrónico de fertirrigación y control ambiental en un invernadero. La metodología compara la información recopilada en sitio, confrontado el efecto de las acciones de control sobre las variables físico químicas del suelo cercanas a la raíz de la planta y la de su ambiente circundante. La información recopilada en el tiempo, es analizada para identificar y evaluar el desempeño del hardware, así como la funcionalidad del controlador. Los resultados permiten evidenciar el aporte de método introducido, dado que se logra validar el prototipo en cada una de las etapas del proceso de control, manteniendo los valores de las variables evaluadas, cercanos al valor de referencia. Finalmente, se logra controlar todas las variables con un único controlador, y se destaca la importancia de contar con interfaz de usuario en sitio y a través de la red para la gestión de controlador.
Electric arc furnace provides a relatively simple way for melting metals. They are used in the pr... more Electric arc furnace provides a relatively simple way for melting metals. They are used in the production of highly purified steel, aluminium, copper and other metals. However, they are considered the more damaging load for the power system. It is very important, therefore, to count on arc furnace models for determining with high degree of accuracy the performance of this type of load. In this way, it would be possible to assess the impact in terms of power quality indices for the power system to which they might be connected. When using electric arc furnace models in practice, a key issue is the calibration of the parameters of the model. In this paper, we show a procedure for calibrating all the parameters of an AC electric arc furnace model using real measurements of voltages and currents. It uses a multilayer neural network as an emulator of the electric arc furnace model. The neural network is trained using data obtained from the simulation of the electric arc furnace model implemented in Matlab®-Simulink®. Once the network is trained, the parameters of interest are obtained by solving an inverse problem. Results obtained show a maximum percentage error of 4.1 % for the rms value of the current involved in the electrical arc.
Revista Facultad De Ingenieria-universidad De Antioquia, 2021
Human activity detection has evolved due to the advances and developments of machine learning tec... more Human activity detection has evolved due to the advances and developments of machine learning techniques, which have enabled solutions to new challenges without ignoring prevalent difficulties that need to be addressed. One of the challenges is the learning model’s sensitivity regarding the unbalanced, atypical, and overlapping information that directly affects the performance of the model. This article evaluates a methodology for the classification of human activities that penalizes defective information. The methodology is carried out through two redundant classifiers, a penalized support vector machine that detects the sub-movements (micromovements) and the Marvok Hidden Model that predicts the activity given the micromovements sequence. The performance of the method was compared with state-of-the-art techniques, and the findings suggested significative advance in the detection of micro-movements compared to the data obtained with non-penalized paradigms. In this research, an ade...
Los intercomunicadores son pequenas centrales telefonicas que permiten comunicar paciente con el ... more Los intercomunicadores son pequenas centrales telefonicas que permiten comunicar paciente con el personal medico en un centro de salud. Esta funcion simple pero importante impacta no solo la eficiencia del servicio sino ademas la calidad de vida de los pacientes. Sin embargo la demanda de servicio por parte del paciente debe ser de conocimiento publico con el objeto de aumentar los indices de calidad del servicio prestado. En este documento se disena un sistema de instrumentacion y medida inalambrico que informa al publico, la habitacion que demanda atencion al personal medico en un centro de salud. El sistema utiliza una red de pulsadores que emula al intercomunicador, la cual envia las llamadas a un microcontrolador, el cual, procesa la informacion que finalmente es transmitida via inalambrica al indicador luminoso (Display). El sistema posee ventajas operativas como flexibilidad, portatil, facil mantenimiento, facil instalacion, que lo hacen adaptable en escenarios similares.PALA...
espanolSe describe un sistema de monitoreo local de temperatura y caudal en una granja porcicola.... more espanolSe describe un sistema de monitoreo local de temperatura y caudal en una granja porcicola. El metodo consiste en disenar un sistema de instrumentacion y medida, este utiliza una red de sensores inalambrica (WSN) basada en el estandar ZigBee, la WSN envia los datos recolectados a un servidor que almacena la informacion en una base de datos con el proposito de consultar (en forma local), en cualquier momento, los datos leidos usando los dispositivos electronicos. Los resultados preliminares muestran que las lecturas pueden ser utilizadas para inferir comportamiento de las variables bajo estudio, ademas el prototipo es escalable, eficiente, lo cual hace que sea facilmente adaptable a cualquier granja porcicola. EnglishWe present a local monitoring system of temperature and caudal in a pig farm. The method consists of designing an instrumentation and measurement system, this uses a wireless sensor network (WSN) based on the ZigBee standard. The WSN sends the gathered data to a se...
En este documento se presenta un caso de estudio para evaluar la eficiencia que presentan los des... more En este documento se presenta un caso de estudio para evaluar la eficiencia que presentan los descriptores espacio frecuencia en la clasificación de patrones textiles. La metodología de trabajo consta de tres etapas fundamentales, la caracterización, la clasificación y la validación. En la etapa de caracterización se utilizan descriptores como la transformada Wavelet, la transformada de Fourier y la adaptación de la Transformada corta de Fourier en espacio para la generación de un vector de características, a este vector se le computa los momentos estadísticos como Kurtosis, sesgo, media y desviación estándar. Para la etapa de clasificación se analiza el uso de tres métodos del estado del arte como lo son las Máquinas de Soporte Vectorial (SVM), las Redes Neuronales Artificiales (RNA) y el Proceso Gaussiano (GP). Para validar el método se construye una base de datos anotada con diez tipos de telas con un total de 1000 fotos, a las cuales se le aplica el proceso caracterización y cla...
In this article, it is proposed a prototype oriented to nurse-call, which allows to create and in... more In this article, it is proposed a prototype oriented to nurse-call, which allows to create and inform the request of emergency care of a patient to the public, by means of embedded devices like the Raspberry Pi and a Display Touchscreen LCD. The emergency call is carried out by means of a network of switches that activate a channel, then this signal is conditioned and processed to be transmitted by means of a serial bus RS-485, then the received message is decoded and shown on an LCD screen, finally the request information is stored in a database. Some experiments were conducted to evaluate the energy consumption, the rate of data loss, the scope, as well as tests to validate the scalability of the prototype. The results show that the proposal presents an increase in the demand of electric energy, mainly due to the characteristics of the technology used, however, the results show that the designed system allows to quantify the dynamic in the time of the nurse-call and is compatible ...
Automatic human activity recognition is an area of interest for developing health, security, and ... more Automatic human activity recognition is an area of interest for developing health, security, and sports applications. Currently, it is necessary to develop methods that facilitate the training process and reduce the costs of this process. This paper explores a methodology to classify human physical activities in a semi-supervised paradigm. With this approach, it is possible to reduce the number of labels necessary to train the learning model and the complexity of this process. This process begins by deducting the number of micro-movements or sub-movements where the data should be grouped and assigning the label through a clustering technique. We perform this procedure for a specific group of micro-movements whose label is unknown. Later, the classification process starts by using two methods, a Support Vector Machine (SVM) that identifies the micro-movements and a Markov Hidden Model that detects the human physical activity as a function of sequences. The results show that with a pe...
Automatic human activity recognition is an area of interest for developing health, security, and ... more Automatic human activity recognition is an area of interest for developing health, security, and sports applications. Currently, it is necessary to develop methods that facilitate the training process and reduce the costs of this process. This paper explores a methodology to classify human physical activities in a semi-supervised paradigm. With this approach, it is possible to reduce the number of labels necessary to train the learning model and the complexity of this process. This process begins by deducting the number of micro-movements or sub-movements where the data should be grouped and assigning the label through a clustering technique. We perform this procedure for a specific group of micro-movements whose label is unknown. Later, the classification process starts by using two methods, a Support Vector Machine (SVM) that identifies the micro-movements and a Markov Hidden Model that detects the human physical activity as a function of sequences. The results show that with a pe...
Automatic recognition of human activities is an important task in computer vision applications. R... more Automatic recognition of human activities is an important task in computer vision applications. Robust approaches using one or more sensors generally link redundant features that consume computing resources and computation time during the sub-activity classification process. This article explores dimension reduction for recognizing human activities and primitive movements by merging data from Kinect visual depth sensors, IMUs inertial sensors, and electrodes of electromyographic record (EMGs). It shows a comparative study where the different techniques of reduction of state of the art are evaluated characteristics; behavior is analyzed based on performance in recognition of activities and computation time of the methods under study. The results show that state-of-the-art methodologies could have a lower temporary cost when implementing them without significantly affecting performance when recognizing the activity.
Los sistemas de instrumentación y medida han sido desarrollados con el propósito de monitorear, s... more Los sistemas de instrumentación y medida han sido desarrollados con el propósito de monitorear, supervisar y controlar sistemas físicos. Estos sistemas físicos pueden llegar a ser muy simples (como por ejemplo medir temperatura) o por el contrario muy complejos (control de un sistema de producción industrial) donde es necesario desarrollar un sistema de medida robusto y flexible que esté en la capacidad de operar en un ambiente altamente contaminado. Una de las etapas fundamentales de los sistemas de instrumentación y medida es el sensor, el cual, es el elemento que convierte la información del mundo físico (caudal, velocidad, aceleración, presión etc) en una señal eléctrica. Por lo tanto, al supervisar, monitorear o controlar fenómenos físicos, la selección de las mejores ubicaciones de medición es una tarea imprescindible. Debido a que la red de sensores a instalarse debe ser informativa y económica. Básicamente una red de sensores se puede implementar de dos maneras. La primera e...
Electric arc furnaces provide a relatively simple way for melting metals. They are used in the pr... more Electric arc furnaces provide a relatively simple way for melting metals. They are used in the production of highly purified steel, aluminium, copper and other metals. However, they are considered the most damaging load for electrical power systems. It is very important, therefore, to have arc furnace models that can determine the behavior of this type of load with a high degree of accuracy. In this way, it would be possible to assess the impact in terms of power quality indices for the power system to which they are connected. When using electric arc furnace models in practice, a key issue is the calibration of the model’s parameters. In this paper, we show a procedure for calibrating all the parameters of an AC electric arc furnace model using real measurements of voltages and currents. A multilayer neural network is used as an emulator of the electric arc furnace model. The neural network is trained using data obtained from the simulation of the electric arc furnace model impleme...
La comunicación entre pacientes y el personal médico es una tarea imprescindible para el buen fun... more La comunicación entre pacientes y el personal médico es una tarea imprescindible para el buen funcionamiento de hospitales y/o clínicas. Para ello, los centros de salud cuentan con intercomunicadores (pequeña central telefónica), estos equipos cumplen con una variedad de funciones que permiten potencializar la comunicación dentro de los centros hospitalarios. Sin embargo, la solicitud de servicio por parte del paciente debe estar disponible al público en general con el propósito de mejorar la calidad del servicio. En este documento se describe un sistema de instrumentación y medida que permite informar al público en general, que habitación solicita el servicio a la enfermería en un hospital. El sistema utiliza una central telefónica que envía las llamadas a un microcontrolador, el cual, procesa la información para finalmente mostrarla en un indicador luminoso (display). El sistema posee ventajas como sencillez, fácil instalación, bajo costo, que lo hacen adaptable a aplicaciones sim...
We present a local monitoring system of temperature and caudal in a pig farm. The method consists... more We present a local monitoring system of temperature and caudal in a pig farm. The method consists of designing an instrumentation and measurement system, this uses a wireless sensor network (WSN) based on the ZigBee standard. The WSN sends the gathered data to a server that stores the information in a database with the purpose of consulting (local queries) at any time the data that have been measured by the electronic devices. The preliminary results show that the data we can be used to infer behavior of the variables under study, besides the prototype is scalable, efficient, that makes it easily adaptable to any pig farm.
Electric arc furnace provides a relatively simple way for melting metals. They are used in the pr... more Electric arc furnace provides a relatively simple way for melting metals. They are used in the production of highly purified steel, aluminium, copper and other metals. However, they are considered the more damaging load for the power system. It is very important, therefore, to count on arc furnace models for determining with high degree of accuracy the performance of this type of load. In this way, it would be possible to assess the impact in terms of power quality indices for the power system to which they might be connected. When using electric arc furnace models in practice, a key issue is the calibration of the parameters of the model. In this paper, we show a procedure for calibrating all the parameters of an AC electric arc furnace model using real measurements of voltages and currents. It uses a multilayer neural network as an emulator of the electric arc furnace model. The neural network is trained using data obtained from the simulation 1 Ingeniero eléctrico. Magíster en In...
En este artículo se presenta el procedimiento de validación de un prototipo electrónico de fertir... more En este artículo se presenta el procedimiento de validación de un prototipo electrónico de fertirrigación y control ambiental en un invernadero. La metodología compara la información recopilada en sitio, confrontado el efecto de las acciones de control sobre las variables físico químicas del suelo cercanas a la raíz de la planta y la de su ambiente circundante. La información recopilada en el tiempo, es analizada para identificar y evaluar el desempeño del hardware, así como la funcionalidad del controlador. Los resultados permiten evidenciar el aporte de método introducido, dado que se logra validar el prototipo en cada una de las etapas del proceso de control, manteniendo los valores de las variables evaluadas, cercanos al valor de referencia. Finalmente, se logra controlar todas las variables con un único controlador, y se destaca la importancia de contar con interfaz de usuario en sitio y a través de la red para la gestión de controlador.
Electric arc furnace provides a relatively simple way for melting metals. They are used in the pr... more Electric arc furnace provides a relatively simple way for melting metals. They are used in the production of highly purified steel, aluminium, copper and other metals. However, they are considered the more damaging load for the power system. It is very important, therefore, to count on arc furnace models for determining with high degree of accuracy the performance of this type of load. In this way, it would be possible to assess the impact in terms of power quality indices for the power system to which they might be connected. When using electric arc furnace models in practice, a key issue is the calibration of the parameters of the model. In this paper, we show a procedure for calibrating all the parameters of an AC electric arc furnace model using real measurements of voltages and currents. It uses a multilayer neural network as an emulator of the electric arc furnace model. The neural network is trained using data obtained from the simulation of the electric arc furnace model implemented in Matlab®-Simulink®. Once the network is trained, the parameters of interest are obtained by solving an inverse problem. Results obtained show a maximum percentage error of 4.1 % for the rms value of the current involved in the electrical arc.
Revista Facultad De Ingenieria-universidad De Antioquia, 2021
Human activity detection has evolved due to the advances and developments of machine learning tec... more Human activity detection has evolved due to the advances and developments of machine learning techniques, which have enabled solutions to new challenges without ignoring prevalent difficulties that need to be addressed. One of the challenges is the learning model’s sensitivity regarding the unbalanced, atypical, and overlapping information that directly affects the performance of the model. This article evaluates a methodology for the classification of human activities that penalizes defective information. The methodology is carried out through two redundant classifiers, a penalized support vector machine that detects the sub-movements (micromovements) and the Marvok Hidden Model that predicts the activity given the micromovements sequence. The performance of the method was compared with state-of-the-art techniques, and the findings suggested significative advance in the detection of micro-movements compared to the data obtained with non-penalized paradigms. In this research, an ade...
Los intercomunicadores son pequenas centrales telefonicas que permiten comunicar paciente con el ... more Los intercomunicadores son pequenas centrales telefonicas que permiten comunicar paciente con el personal medico en un centro de salud. Esta funcion simple pero importante impacta no solo la eficiencia del servicio sino ademas la calidad de vida de los pacientes. Sin embargo la demanda de servicio por parte del paciente debe ser de conocimiento publico con el objeto de aumentar los indices de calidad del servicio prestado. En este documento se disena un sistema de instrumentacion y medida inalambrico que informa al publico, la habitacion que demanda atencion al personal medico en un centro de salud. El sistema utiliza una red de pulsadores que emula al intercomunicador, la cual envia las llamadas a un microcontrolador, el cual, procesa la informacion que finalmente es transmitida via inalambrica al indicador luminoso (Display). El sistema posee ventajas operativas como flexibilidad, portatil, facil mantenimiento, facil instalacion, que lo hacen adaptable en escenarios similares.PALA...
espanolSe describe un sistema de monitoreo local de temperatura y caudal en una granja porcicola.... more espanolSe describe un sistema de monitoreo local de temperatura y caudal en una granja porcicola. El metodo consiste en disenar un sistema de instrumentacion y medida, este utiliza una red de sensores inalambrica (WSN) basada en el estandar ZigBee, la WSN envia los datos recolectados a un servidor que almacena la informacion en una base de datos con el proposito de consultar (en forma local), en cualquier momento, los datos leidos usando los dispositivos electronicos. Los resultados preliminares muestran que las lecturas pueden ser utilizadas para inferir comportamiento de las variables bajo estudio, ademas el prototipo es escalable, eficiente, lo cual hace que sea facilmente adaptable a cualquier granja porcicola. EnglishWe present a local monitoring system of temperature and caudal in a pig farm. The method consists of designing an instrumentation and measurement system, this uses a wireless sensor network (WSN) based on the ZigBee standard. The WSN sends the gathered data to a se...
En este documento se presenta un caso de estudio para evaluar la eficiencia que presentan los des... more En este documento se presenta un caso de estudio para evaluar la eficiencia que presentan los descriptores espacio frecuencia en la clasificación de patrones textiles. La metodología de trabajo consta de tres etapas fundamentales, la caracterización, la clasificación y la validación. En la etapa de caracterización se utilizan descriptores como la transformada Wavelet, la transformada de Fourier y la adaptación de la Transformada corta de Fourier en espacio para la generación de un vector de características, a este vector se le computa los momentos estadísticos como Kurtosis, sesgo, media y desviación estándar. Para la etapa de clasificación se analiza el uso de tres métodos del estado del arte como lo son las Máquinas de Soporte Vectorial (SVM), las Redes Neuronales Artificiales (RNA) y el Proceso Gaussiano (GP). Para validar el método se construye una base de datos anotada con diez tipos de telas con un total de 1000 fotos, a las cuales se le aplica el proceso caracterización y cla...
In this article, it is proposed a prototype oriented to nurse-call, which allows to create and in... more In this article, it is proposed a prototype oriented to nurse-call, which allows to create and inform the request of emergency care of a patient to the public, by means of embedded devices like the Raspberry Pi and a Display Touchscreen LCD. The emergency call is carried out by means of a network of switches that activate a channel, then this signal is conditioned and processed to be transmitted by means of a serial bus RS-485, then the received message is decoded and shown on an LCD screen, finally the request information is stored in a database. Some experiments were conducted to evaluate the energy consumption, the rate of data loss, the scope, as well as tests to validate the scalability of the prototype. The results show that the proposal presents an increase in the demand of electric energy, mainly due to the characteristics of the technology used, however, the results show that the designed system allows to quantify the dynamic in the time of the nurse-call and is compatible ...
In this article, it is proposed a prototype oriented to nurse-call, which allows to create and in... more In this article, it is proposed a prototype oriented to nurse-call, which allows to create and inform the request of emergency care of a patient to the public, by means of embedded devices like the Raspberry Pi and a Display Touchscreen LCD. The emergency call is carried out by means of a network of switches that activate a channel, then this signal is conditioned and processed to be transmitted by means of a serial bus RS-485, then the received message is decoded and shown on an LCD screen, finally the request information is stored in a database. Some experiments were conducted to evaluate the energy consumption, the rate of data loss, the scope, as well as tests to validate the scalability of the prototype. The results show that the proposal presents an increase in the demand of electric energy, mainly due to the characteristics of the technology used, however, the results show that the designed system allows to quantify the dynamic in the time of the nurse-call and is compatible with other similar systems.
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