• Journal of Biosystems Engineering
• /
• 제23권1호
• /
• pp.83-90
• /
• 1998

In this paper the automatic system for dairy cattle has been desisted such as body temperature measuring unit, feed supplying unit and temperature control unit. Since e disease is strongly related to the body temperature of cattle, early detection of the abnormal temperature would prevent the severe problems which nay occur in dairy farms. An electronic component AD590J is used as temperature sensor for the system, The device is highly robust against the noise since the output signal is the current so it can be applied to a long distance sensing The resolution of signal is 0.1$^{\circ}C$ and the current is 10㎷ Also 12-bit A/D converter is desisted fir interfacing the sensor with a one-chip microprocessor. A temperature measuring experiment using the developed system has been done for measuring the temperature of human beings and the system was proven to be useful for measuring the body temperature of dairy cattle properly. A geared AC motor is used for the feed supplying unit The heater and fm are used as temperature control unit. The feed supplying unit and temperature control unit are well operating in the laboratory experiment.

• Journal of Power Electronics
• /
• 제8권2호
• /
• pp.121-130
• /
• 2008

This paper introduces a design and implementation of a digital control unit for an Oxygenaire Servo Baby Incubator. The control unit is designed and implemented according to international standards. The control unit is based on an AVR Atmel microcontroller unit. It is built for monitoring and control and displays the three main temperature values: set point temperature, baby skin temperature and air temperature. User friendly software is implemented. The implemented control unit was tested in the laboratory as well as in the field. The control unit is sensitive to change of $0.1^{\circ}C$. At startup, based on a unique control strategy, the incubator reaches its steady state in about 14 minutes. The system schematic diagrams are shown in the paper. Also, programs flow charts are presented. The control unit was designed and implemented based on a contract between the Electronics Research Institute (ERI) and ENGIMED Company. The authors would like to thank ERI and ENGIMED for introducing all required finance and shoring to complete this work.

• 대한설비공학회지:설비저널
• /
• 제17권4호
• /
• pp.442-447
• /
• 1988

To keep comfortable indoor condition, the existing air conditioning system is controlled by the ON/OFF temperature controller. The PID control unit is developed to control temperature and humidity simultaneously, and the Air-conditioning control system is transferred from the ON/OFF temperature controller to the PID control unit for experiment. As a result of this experiment, the PID control unit reduced energy consumption compared with the ON/OFF control unit.

• 대한기계학회:학술대회논문집
• /
• 대한기계학회 2007년도 춘계학술대회B
• /
• pp.1937-1941
• /
• 2007

During a process of a nanoimprint for manufacturing LCD, a small temperature variation on the LCD glass can cause thermal stress and generate unexpected displacement. To avoid this trouble, a precision temperature control unit using thermoelectric modules is appropriate for nanoimprint processes. The unit consists of an air control system, a cooling water control system, and a power control system. The air control system includes a thermoelectric module, thermocouples measuring temperatures of air and a duct-stale fin, and two air fans. The heat generated by the thermoelectric module is absorbed by the cooling water control system. The power control system catches the temperature of the thermoelectric module, and a PID controller with SCR controls the input power of the thermoelectric module. Temperature control performance is evaluated by experiment and simulation. The temperature control unit is able to control the exit temperature about ${\pm}2^{\circ}C$ from the incoming fluid temperature, and the error range is ${\pm}0.1^{\circ}C$. However, the control time is approximately 30minute, which needs further study of active control

• 한국정밀공학회:학술대회논문집
• /
• 한국정밀공학회 2003년도 춘계학술대회 논문집
• /
• pp.451-454
• /
• 2003

The Oil Coolers is very important unit for the stable thermal performance in machine tools, semiconductor equipments and high precision measuring systems. To select a proper oil cooler for the temperature control of core unit in a machine, not only cooling ability but also static and dynamic sensitivity of temperature sensors are considered. In this paper, the relationship between cooling ability and inflow oil temperature is identified. The cooling ability is increased with the increase of inflow oil temperature. The oil temperature control errors of a cooler are influenced by mainly sensitivity of temperature sensors and heating velocity in a machine. The validity of error cause analysis for temperature control is proved by real cooling experiments with inflow and outflow temperature sensors.

• 제어로봇시스템학회:학술대회논문집
• /
• 제어로봇시스템학회 2001년도 ICCAS
• /
• pp.100.2-100
• /
• 2001

In this paper, we presented a switching-based control algorithm for improving the speed of response on temperature control of an extruder. We proposed a switching actuating value method in a temperature control of extruder and showed the effect of H$\infty$ control and PID control. Recently, the memoryless feedback control had proposed, which was not only the real time integration element, but also the memory elements. We examined the application of a switching actuating value method to a memoryless feedback, in a unit barrel temperature control of an extruder.

• 한국식품위생안전성학회지
• /
• 제18권4호
• /
• pp.218-223
• /
• 2003

대조구와 1.5%-인삼강정의 AV, POV 및 산패위 발생시기를 측정한 결과 가속저장과 실온저장 간의 관계는 다음과 같다. 1. AV의 가속저장과 실온저장의 관계를 살펴보면, 대조구의 경우 가속저장 시 0시간<4시간<8시간<12시간<16시간<20시간<24시간은 실온저장 시 각각 0개월<약 1.1개월<약 1.4개월<약 3.4개월<약 4.3개월<약 5.1개월<약 5.9개월이며, 1.5%-인삼처리구의 경우 가속 저장 시 0시간<4시간<8시간<12시단<16시간<20시간<24시간은 실온저장 시 각각 0개월<약 1.2개월<약 2.5개월<약 2.9개월<약 4.7개월<약 5.4개월<6개월로 이와 같이 증가 하는 것으로 나타났다. AV는 $60^{\circ}C$, RH 50%에서 대조구이 경우 가속저장 1시간이 실온저장 7일에, 1.5%-인삼처리구의 경우 1시간이 실온저장 7.5일에 해당되는 것으로 나타났다. 2. POV의 가속저장과 실온저장의 관계를 살펴보면, 대조구의 경우 가속저장 시 0시간<4시간<8시간<12시간<16시간<20시간<24시간은 실온저장 시 각각 0개월<약 1.3개월<약 2.2개월<약 3.4개월<약 5.2개월<약 5.7개월<6개월 이상이며, 1.5%-인삼처리구인 경우 가속정장 시 0시간<4시간<8시간<12시간<16시간<20시간<24시간은 실온저장 시 각각 0개월<약 1.0개월<약 2.0개월<약 2.7개월<약 4.5개월<약 5.7개월<6개월로 이와 같이 증가 하는 것으로 나타났다. POV는 $60^{\circ}C$, RH 50%에서 대조구의 경우 가속저장 1시간이 실온 저장 7.5일에, 1.5%-인삼처리구의 경우 1시간이 실온저장 7.7일에 해당되는 것으로 나타났다. 3. 저장기간 중 산패취 발생시기의 경우, 대조구는 가속저장과 실온저장 시 AV 및 POV의 저장안전시기와 유사한 시기에 산패취가 발생하였으나, 1.5%-인삼처리구의 경우 가속저장이 실온저장에 비해 약 1개월 정도 앞서 산패취가 발생하여 다소 차이를 보였다.

• 대한기계학회:학술대회논문집
• /
• 대한기계학회 2008년도 추계학술대회A
• /
• pp.1309-1313
• /
• 2008

This paper suggests an example of modification of the durability test specifications of electronic control unit for an automotive system in phase of design validation. The basic concept to redefine the specifications of durability test is based on the Arrhenius relationship for accelerated temperature test and the modified Coffin-Manson model for temperature cycle test. The ambient temperature of the powered-event durability test is increased to reduce the required test time of the current specification. Furthermore, the holding time between the events to cool down the temperature of the components is shortened and the resultant temperature rise affects the durability of the components. Thus, the acceleration factor due to the increased temperature range of temperature cycle is also estimated by the modified Coffin-Manson model.

• 제어로봇시스템학회:학술대회논문집
• /
• 제어로봇시스템학회 1992년도 한국자동제어학술회의논문집(국내학술편); KOEX, Seoul; 19-21 Oct. 1992
• /
• pp.292-296
• /
• 1992

There are lots of disturbance in the super heater temperature control system of power plant boiler as follows. 1.Burner light off. 2.Excess Air. 3.Burner tilt. 4.G.R fan flow. Temperature control system of super heater in the power plant has delay time about 5 min. So it is difficult to control the super heater temperature in the power plant. This paper show us the application of domestic development DCS to control the super heater temperature in seoul #5 thermal power plant unit.

• 동서간호학연구지
• /
• 제18권2호
• /
• pp.59-65
• /
• 2012

Purpose: The purpose of this study was to examine the effects of Kangaroo Care (KC) on physiological marker of preterm infant in neonatal intensive care unit (NICU). Methods: The research design was a nonequivalent control group pretest-posttest. Data were collected from July 1, 2007 to February 29, 2008. The participants were 26 people of experimental group and 27 people of control group. KC was applied three times per day, for a total ten times of 4 days to the experimental group. Results: There was significant difference between experimental and control groups on the skin temperature on of preterm infants. The skin temperature in the intervention group was significantly higher than in the control group. Conclusion: Kangaroo care can be applied as a supportive nursing intervention to preterm infant at neonatal intensive care unit.