scholarly journals Design of an Enhanced Temperature Control System for Neonatal Incubator

2013 ◽  
Vol 5 (1) ◽  
pp. 53-61 ◽  
Author(s):  
Tamanna Afrin Tisa ◽  
Zinat Ara Nisha ◽  
Md Adnan Kiber
Keyword(s):  
Control System ◽  
Temperature Control ◽  
Pulse Width Modulation ◽  
Medical Physics ◽  
Temperature Control System ◽  
Month Of Birth ◽  
Voltage Output ◽  
Infant Incubator ◽  
Temperature Monitor ◽  
Range Of Variation

Worldwide every year over 4 million infants die within a month of birth. Of this number, 3.9 million belong to the developing world. Some (25%) of this deaths are caused due to complications of prematurity, most often due to improper heat regulation, water loss and neonatal jaundice. An infant incubator provides stable levels of temperature, relative humidity and oxygen concentration. Temperature control system is the most important part of a baby incubator which has to be maintained around 37°C. In the present work we have designed and developed an enhanced temperature control system incorporating a combination of Pulse Width Modulation (PWM) and simple ON-OFF control system, where thermistors have been used as temperature sensors. The range of variation of temperature against the set temperature (37°C) has been found to be 1°C which is satisfactory. A temperature monitor has been designed through a circuit network incorporating a thermistor so that the voltage output is linearly related to the temperature. This allowed the use of a simple millivoltmeter to display the temperature directly through appropriate scaling. To ensure the safety of the baby an alarm circuit was designed which provides sound alarms for personnel attention if the temperature goes beyond a specified safe range, chosen here as 26°C – 38°C. In developing countries, like Bangladesh frequent power cuts demand an uninterrupted operation of incubator and a battery back up system, which could also be powered by a solar panel, has been suggested for this purpose. DOI: http://dx.doi.org/10.3329/bjmp.v5i1.14668 Bangladesh Journal of Medical Physics Vol.5 No.1 2012 53-61

The Design and Implementation of A Low Cost Temperature Monitor and Control system

2011 ◽  
Vol 66-68 ◽  
pp. 2256-2259
Author(s):  
Li Wu ◽  
Wen Xu ◽  
Jian Guo
Keyword(s):  
Control System ◽  
Temperature Control ◽  
Low Cost ◽  
Temperature Control System ◽  
Input Circuit ◽  
Measurement Circuit ◽  
Temperature Monitor ◽  
And Control ◽  
The Given ◽  
Monitor And Control

In this article, the new method for designing the temperature control system with low vibration for a scanning the given object is proposed. The system uses STC89LE516AD as the CPU, and some peripheral circuits: keypad input circuit, the temperature measurement circuit, and LED display circuit to monitor and control the temperature of the given object. By using a small number of hardware devices and software designation, we realize the function of real-time temperature monitor and control. The results show that our goal to construct the temperature control system for a given object with relatively high precision can be realized by using the proposed method, and the system proved to be strong, low cost, with strong practical.

Temperature Control System for Transformer Three-Phase 50 Hz 2500 kVA

2017 ◽  
Vol 3 (2) ◽  
pp. 88
Author(s):  
Suci Rahmatia ◽  
Marsah Zaysi Makhudzia
Keyword(s):  
Optimal Control ◽  
Control System ◽  
Heat Loss ◽  
Temperature Control ◽  
Electrical Energy ◽  
Temperature Control System ◽  
Iron Core ◽  
Electrical Device ◽  
Optimal Control System ◽  
Three Phase

<p><em>Abstrak <strong>- </strong></em><strong>Transformator adalah peralatan listrik yang sangat vital dalam proses pembangkitan maupun transmisi energi listrik karena transformator dapat menaikkan atau menurunkan tegangan. Pada proses menaikkan dan menurunkan tegangan biasanya sering timbul panas akibat rugi – rugi tembaga pada inti besi dan kumparannya sehingga pada kondisi overload akan menimbulkan pemanasan yang berlebih dan dapat mempengaruhi kinerja transformator. Oleh karena itu dibuat sistem kontrol temperatur pada transformer yang dapat mengontrol temperatur di dalam transformator saat bekerja pada kondisi overload, sehigga transformatornya tidak terbakar. Dial thermometer digunakan sebagai alat yang mengontrol temperatur transformator pada sistem kontrol temperatur. Agar mendapatkan sistem kontrol yang optimal, maka setting temperatur pada dial thermometer di sesuaikan dengan temperatur maksimal tranformator dapat bekerja. Sehingga pada saat temperatur tertentu dial thermometer dapat memberikan sinyal untuk membunyikan alarm dan mengaktifkan kontrol kipas sehingga kipas dapat bekerja menurunkan temperatur transformator.<em></em></strong></p><p><strong><em> </em></strong></p><p><strong><em>Kata kunci - </em></strong><em>transformator, rugi – rugi tembaga, temperatur, sistem kontrol, dial thermometer<strong>.</strong></em></p><p><strong><em> </em></strong></p><p><em>Abstract <strong>- </strong></em><strong>A transformer is an electrical device that is vital in the generation and transmission of electrical energy because the transformer can raise (stepping up) or lower (stepping down) the voltage. In the process of raising and lowering the voltage is usually often caused heat loss of copper in iron core and coil so that the overload condition will cause excessive warming and can affect the performance of the transformer. Therefore, a temperature control system on the transformer can control the temperature inside the transformer while working under overload conditions, so the transformer is not burned. Dial thermometer is used as a device that controls the temperature of the transformer in the temperature control system. In order to obtain an optimal control system, the temperature setting on the dial thermometer adjusted to the maximum transformer temperature can work. So that when a certain temperature dial thermometer can provide a signal to sound the alarm and activate the fan control so that the fan can work down the transformer temperature.</strong></p><p><strong> </strong></p><p><strong><em>Keywords -  </em></strong><em>transformator, loss of copper, themperature, control system, dial thermometer<strong></strong></em></p>

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