Development of a Low-Cost Portable Heartbeat Monitor Using an Infrared Sensor and a Microcontroller-Digital Stethoscope (Published)
The problem of shortage of medical devices in rural areas of Nigeria, cause a budget to be limited and constrained. Therefore, developing medical devices at low cost is one solution. This paper proposes an improvement, portability, and cost-effectiveness of the heart rate measuring devices being applied in the Rural Local medical in Akure South Local Government Area of Ondo State of Nigeria; through the development of a Low-Cost Portable Heart Beats Monitor using an Infrared Sensor and a Microcontroller. The development of the prototype is to function as an assisting device for a user which has a busy lifestyle to monitor the heart rate at any place in the real-time condition. This report contains the detailed procedures involved in designing the heartbeat monitoring circuit, developing the circuit design, and carrying out the performance evaluation of the system developed. In this project, Infrared LED and photodiode have been used as a sensor to measure a heart rate and a PIC16F876A microcontroller acts as a controller to process the input and output of the device. The development of the prototype starts with designing the sensor circuit, signal conditioning circuit, voltage regulator circuit, microcontroller circuit, and dual power supply unit. After the functionality test, these circuits were integrated with the output display. The prototype design is able to display the heart rate measurement in beats per minute (BPM) and the condition of heart rate either low, normal, or high heart rate on a 16×2 matrix Liquid Crystal Display (LCD).
Keywords: Monitoring, heartbeats, infrared sensor, low-cost
Implementation of Direct Fuzzy Controller in Greenhouse Based on Labview (Published)
The techniques for climate control in greenhouse are to tune the crop needs and avoid unnecessary energy consumption. A greenhouse environment is an incredibly complex and dynamic environment. The use of Fuzzy Logic Controllers (FLCs) represents a powerful way to minimize and facilitate management of climate conditions of the modern greenhouse. Since the temperature of greenhouse was important factor that affects the crops growth and the yield, we have designed and investigated a computer based on direct fuzzy Controller for greenhouse temperature control system. In this study, we present the implementation of a fuzzy logic based control system for the regulation of climatic parameters under greenhouse using LabVIEW software through heating and cooling to ensure an exact range of temperature and humidity values. Some graphics user interfaces were developed, under LabVIEW software, for the real-time monitoring of the greenhouse system.
Keywords: Computer based control, Direct fuzzy logic, Greenhouse climate, LabVIEW, Monitoring