Monitoreo de concentración de monóxido de carbono usando tecnología Long-Range

Abstract

Se presenta un sistema de monitoreo remoto de sensores de monóxido de carbono (CO) en un hospital usando transceptores Long-Range. Un gas altamente tóxico que no puede ser detectado por el ser humano y que causa daños en la salud es el CO. Existen zonas de hospitales donde la pureza del aire es mayor a 90 % y es monitoreada continuamente. El objetivo de este trabajo fue diseñar un sistema inalámbrico que reporte a un servidor ubicado en la Internet los niveles de concentración de CO de diez sensores dispuestos en áreas de un hospital. Se implantó una red de área amplia de bajo consumo de energía, o LPWAN por sus siglas en inglés, utilizando diez transceptores de tecnología Long-Range y un gateway. Cada nodo de la LPWAN consta de un sensor de CO, un módulo de sistema de posicionamiento global, un display de cristal líquido de cuarzo, un generador de alerta, un microcontrolador y un transceptor Long-Range. Los nodos transmiten los niveles de CO al gateway y este los envía al servidor. Al detectarse un nivel de CO mayor a un valor de umbral se activa una alerta. El sistema detecta concentraciones de CO de 10 a 1000 ppm. El nodo de la red más lejano se encuentra a 1200 metros del gateway y el alcance logrado fue 11,8 kilómetros.A remote monitoring system for carbon monoxide (CO) sensors is presented in a hospital using LongRange transceivers. A highly toxic gas that can t be detected by humans and damages health is CO. There are hospital areas where air purity is greater than 90% and monitored continuously. The objective of this work was to design a wireless system that reports to a server ,located on the Internet, the concentration levels of CO around ten sensors distributed around the areas of a hospital. A low-power wide area network (LPWAN) was deployed using ten Long-Range technology transceivers and a gateway. Each node of the LPWAN consists of a CO sensor, a global positioning system module, a quartz liquid crystal display, an alert generator, a microcontroller and a Long-Range transceiver. The nodes transmit the CO levels to the gateway and the gateway sends them to the server. When a CO level higher than a threshold value is detected, an alert is triggered. The system detects CO concentrations of 10 to 1,000 ppm. The farthest network node is located 1,200 meters from the gateway and the range achieved was 11.8 Kilometers.Palabras clave: hospital, Long-Range, LPWAN, monóxido de carbono sensor, transceptor.

Behavior resulting from fire in plasterboard with plastic cable waste aggregates

“…In terms of CO, the values obtained are high and exceed the maximum limits considered dangerous to health, considering that with 6400 ppm loss of consciousness and risk of death can occur within 10-15 min [38]. However, in this case of incomplete combustion of the panel considered in the type of room proposed, it must be taken into account that organic material, both synthetic (for example, polymeric materials) and natural (for example, wood), would lead to high concentrations of carbon monoxide in a fire, which exceed the limits dangerous to health, as in any uncontrolled fire in which CO is produced as a by-product.…”