Humidity control of an incubator using the microcontroller-based active humidifier system employing an ultrasonic nebulizer.

Department of Electronics and Computer Education, Faculty of Technical Education, Gazi University, Ankara, Turkey.
Journal of Medical Engineering & Technology 01/2002; 26(2):82-8. DOI: 10.1080/03091900110115478
Source: PubMed

ABSTRACT Relative humidity levels of an incubator were measured and controlled. An ultrasonic nebulizer system as an active humidifier was used to humidify the incubator environment. An integrated circuit-type humidity sensor was used to measure the humidity level of the incubator environment. Measurement and control processes were achieved by a PIC microcontroller. The high-performance and high-speed PIC provided the flexibility of the system. The developed system can be used effectively for the intensive care of newborns and/or premature babies. Since the humidifier generates an aerosol in ambient conditions, it is possible to provide the high relative humidity level for therapeutic and diagnostic purposes in medicine.

  • [Show abstract] [Hide abstract]
    ABSTRACT: Typical friction welds are made by holding a non-rotating sample in contact with a rotating sample under constant or gradually increasing pressure until the interface reaches the welding temperature and then stopping pressure rotating to complete the weld. This process requires additional time and is labor intensive. Recently, several control systems have been introduced to the industry for improving the welding process such as conventional automatic control, microcontroller control, and Programmable Logic Controller (PLC). However, these processes have limitations either on materials selection or on visualization. In this study, continuous monitoring, control and recording are implemented. Computer-controlled platform for the simulation and control of mechanisms is based on a Microsoft Visual Basic environment. Welding parameters such as friction time, forge time and breaking time are entered with a keyboard and can be saved and used again. To show the feasibility and versatility of the study, the evaluation is used for sample joining. It has been observed that this system works successfully and gives good performance.
    Materials and Manufacturing Processes 01/2007; 22(1):102-106. · 1.30 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: Swiftlet nests naturally have a high economic value, and hence attract many attentions. Traditional swiftlet nesting generally incorporates manual environmental control. The nesting house's guard might forget or fail to control the environment for many reasons. In this work, a microcontroller based system that will automatically control the temperature and humidity of the nesting house to a condition convenient for the swiftlets were developed. The controller is connected to a monitoring computer which can be 45 m away. The computer will report the status and alarm remotely by sending SMS to the guard and the owner of the nesting house in certain circumstances. A miniature model was made for this development. Functionality and performance of the system were studied on this model. The performance of the sensor as key part of the developed system was verified to commercial instruments. The characteristics of the system were analyzed to obtain the relationship between water that put into the nesting house with the temperature and humidity. A scaling rule is proposed for utilizing the experimental results for applications in realistic nesting houses.
    International Conference on Electrical Engineering and Informatics, ICEEI 2011, Bandung, Indonesia, 17-19 July, 2011; 01/2011
  • [Show abstract] [Hide abstract]
    ABSTRACT: In this work we have developed a new humidifier system based on ultrasonic nebulizer, that's used to control the relative humidity inside the incubator. Real time humidity data was collected using high sensitive sensor SY-230. The humidity dynamic properties of neonatal incubator were evaluated. System identification result is based on genetic algorithm and least squares algorithm (RLS) to find the NARMA input-output mathematical model. For this object, we have achieved and implemented an acquisition chain based on a PIC micro- controller. At the command, a comparative study was made between Proportional Integral Derivative (PID) controller and Model Based Predictive Control (MPC) witch parameters of PID and the cost function of (MPC) were optimized using Genetic Algorithm (GA). The environment for the development of different algorithms is the MATLAB 7.X software.

Full-text (2 Sources)

Available from
Aug 28, 2014