Real-time Temperature Monitoring System Research Articles

Design and Fabrication of a Smart Microwave Oven

In this paper a major modification in home microwave ovens is proposed in which the food status determines the time required for reheating or even cooking the food inside the microwave instead of speculating the length of the time required to achieve the desired status. The proposed microwave called “smart microwave” features a real time temperature monitoring system, which is in charge of monitoring the food inside the microwave using some infrared sensors. It also features a PID (proportional integral derivative) controller that uses the measured temperature as the processed value which is basically the feedback that goes to the processing unit of the controller to assure that the food follows the temperature profile of the set point defined by the user. The smart microwave oven also features an electromagnetic band gap structure in order to make sure that the radiation inside the microwave cavity does not compromise the accuracy of the temperature readings caused by its parasitic effects. The fabrication process of the prototype for the proposed design is also reported in this paper. The proposed smart microwave changes the nature of this device that has always been used only for reheating the food ever since it was introduced to the market as a fast cooking appliance than can take any recipe and accomplish it in no time.

Long-term temperature monitoring of tunnel in high-cold and high-altitude area using distributed temperature monitoring system

Abstract The problem of freeze injury on lining structure of operating tunnel in high-cold and high-altitude area has increasingly stand out. Therefore, the real-time temperature monitoring has become a crucial issue in the process of construction and operation of the tunnel lining and insulation layer. To solve the problems above, a new innovation system for temperature measurement with good accuracy is presented to avoid wrong detection in tunnel. The system was developed and implemented on platinum thermal resistance and a constant current source exciting circuit designed to convert temperature signal into electrical signal. The real-time temperature monitoring system and data acquiring are automated and controlled via embedded devices S3C6410 microprocessor. Measurements are obtained from voltage parameters and this data is then processed and analyzed on the upper computer software. By data analysis around accuracy and error, the accuracy of the proposed system is obtained and higher than ±0.05 °C obviously. Both the modeling and the experimental result show that the method can monitor and locate the freeze injury online at different locations on lining with good accuracy.

EPCIS based online temperature monitoring and traceability in a cold meat chain

Temperature monitoring is the most critical requirement in the management of a cold products chain. A real-time temperature monitoring system can be useful in reducing losses in a cold food chain that occur due to product deterioration caused by fluctuating temperatures. A pilot test was conducted to evaluate the functionality of an EPCIS based online system for time–temperature monitoring and documenting traceability in a cold meat chain. The test was performed during transportation of chilled lamb products. The RFID based temperature sensors were used to record temperature of the product and ambient temperature inside the container at 10min time intervals during transportation between processing plant and a distribution terminal 800km away. The sensors communicated with the main unit installed in the truck and transmitted the data to an EPCIS based system which was accessible through a web interface. The temperature information was recorded as EPCIS events. The results of the application of EPCIS for online temperature monitoring are presented in this paper. Implementing a systematic EPCIS based cold chain monitoring tool can optimize the performance of the whole food supply chain by reducing losses caused by quality deterioration due to temperature variations.

U-헬스케어를 위한 패치형 체온 측정 시스템

With the advancement of ubiquitous computing technology, u-Healthcare (i.e. ubiquitous health care), is regarded as a key application for information society, which provides health management service at anytime in anywhere. To implement U-Healthcare system, it is essential to monitor stable biological information in daily life. In this paper, we proposed a small size, light weight, patch type real time temperature monitoring system based on wireless sensor network (WSN) technology to monitor patients` body temperature without any inconvenience of activity.

광섬유 센서를 이용한 실시간 온도 감시 시스템

본 광 분포 온도 측정 시스템은 광섬유 자체를 온도 측정용 센서로 이용하는 시스템으로, 한 가닥의 광섬유만을 포설하여 포설된 주변 전체 온도를 수 천 점으로 측정이 가능한 시스템이다. 분포 측정의 경우 측정 점의 수를 많이 할 경우 측정점당 비용을 기존 센서의 비용 수준으로 절감 할 수 있으며 동시에 한 두 가닥의 광섬유로 전체 센서를 연결 할 수 있는 장점이 있다. 본 논문에서는 일반적으로 통신용으로 사용하는 광케이블 자체를 센서 (optical sensor cable)로 활용하여 최소한 매 1m 간격으로 센서 기능을 할 수 있는 특성을 이용함으로써 각 센서와 수많은 연결선들을 줄이고 시스템은 컴퓨터를 이용하여 데이터저장, 제어나 보관 등 데이터 관리가 용이하며, 실시간 온도 변화에 따른 온도 이력정보를 이용한 실시간 온도 모니터링 시스템을 구축한다. Optical Temperature Distribution Sensor Measurement System uses fiber optic sensors itself for temperature measurement is a system which can be measured the Installed surrounding entire temperature as a thousand points by laying a single strand of fiber optic. If there are a lot of measuring points in the distribution Measurement, the cost of each measuring point can be reduced the cost level of existing sensors and at the same time this has the advantage of connecting all sensors as one or two strands of fiber. Generally Optical Fiber is used for communication but Optical Fiber itself can be used for sensor and it has the characteristic of sensor function which can be measured Temperature in the at least each one meter distance. By using these characteristics each sensor and the number of Connection Lines can be reduced. In this paper, we implement a real time temperature monitoring system, which is easy to manage and control for data storage, data management, data storage using a computer and which has the functions of monitoring and correction according to Real-time temperature changes using historical temperature data.

Mapping of RFID tag readability in relation to the food content in a refrigerated sea container at 915MHz

Perishable foods are extremely sensitive to temperature abuse often observed during sea transportation, which regularly involves long transit times. The goal of this study was to compare the effects of the cargo on RFID (radio frequency identification) tag readability to achieve real-time temperature monitoring. A 12 m long refrigerated sea container (68 m3) and a 915 MHz RFID system were used. The container was loaded three times with different food products: canned vegetables, fresh meat and frozen bread. Each load was instrumented with 42 RFID tags evenly distributed throughout the volume. Results showed that canned vegetables provide the best readings (97.6% of tags read), followed by fresh meat (61.9%) and frozen bread (57.1%) respectively. These results validated that radio waves at 915 MHz are absorbed by high water as well as ice contents. However, spacing between metal surfaces and tags can allow excellent RFID readability even if RF reflects on metallic surfaces. The food industry is facing great challenges when it comes to food transportation and distribution. Marine transportation is a slow operation that can expose shipments to a significant range of non-ideal temperatures. Refrigeration units may experience failure during shipment, which inevitably causes losses in quality. The implementation of a real-time temperature monitoring system within a container can provide a good tool to address this issue. Radio frequency technology definitely offers additional benefits such as real-time monitoring as well as tracking and tracing.

The Application of the Real-time Temperature Monitoring System for Electric Transmission Lines

In the article, the influencing factors of the high-voltage transmission line running were analyzed, the important meanings of the real-time online monitoring of the line contact point aging for guaranteeing the safe and stable running of the lines were pointed out, the theoretical reference and the project selection of the high-voltage transmission line temperature monitoring were discussed, and the structure composing, working principle and running mode of the project proposed by the author were mainly introduced. The system designed in the article could prejudge the faults of the contact points and implement the state overhaul.