scholarly journals Design, Construction, and Calibration of a Temperature Monitoring System for Resistance Standards

2017 ◽  
Vol 122 ◽  
Author(s):  
Daniel Paseltiner ◽  
Shamith Payagala ◽  
Dean Jarrett
Keyword(s):  
Monitoring System ◽  
Room Temperature ◽  
Systematic Errors ◽  
Temperature Monitoring ◽  
Constant Current ◽  
Expanded Uncertainty ◽  
Thermistor Temperature ◽  
Secure Network ◽  
Design Construction ◽  
Continuous Temperature

We present the design, construction, calibration, and software development of a temperature monitoring system for resistance standards. The system supports 19 temperature probes. Over the range 295.15 K to 299.15 K (22 °C to 26 °C), we report an expanded uncertainty (k = 2) of 9 mK. With the addition of a calibrated standard reference thermometer and a programmable oil bath, the system was used to automatically calibrate the temperature probes over this 4 K range. In continuous operation, this system supplies a constant current to thermistor temperature probes and a reference resistor, and it measures the voltage across them. The ratio between each of the probe voltages and the reference voltage is multiplied by the reference resistance to determine the resistance of each probe. To reduce systematic errors, voltage measurements are taken with the current flowing in both directions. Finally, using the Steinhart-Hart model, the probe resistances are converted to their corresponding temperatures and recorded to a secure network drive. If a probe reads a temperature outside of the desired temperature range for its location, an email alert is sent to all the staff who work in the laboratory. An additional message will be sent to facility services if the probe is measuring the room temperature in the laboratory. The system was developed for the NIST resistance laboratory, but it could easily be duplicated for use in any laboratory environment where continuous temperature monitoring in multiple locations with expanded uncertainty (k = 2) of 9 mK is needed.

Network Monitoring System of Multipoint Temperature Collection and Control

2013 ◽  
Vol 427-429 ◽  
pp. 483-487
Author(s):  
Jian Hua Ji
Keyword(s):  
Real Time ◽  
Monitoring System ◽  
Computer Software ◽  
Temperature Monitoring ◽  
Measured Temperature ◽  
Serial Interface ◽  
Voltage Change ◽  
Thermistor Temperature ◽  
And Control ◽  
Measurement And Control

The temperature monitoring control is the most basic data parameters of the daily life and industrial production; it also has very important significance in multi-point temperature collection, accurate measurement and control monitoring. Therefore, this paper was based on SCM to deal with the temperature information data, design the multipoint temperature monitoring system, design the function of multipoint temperature collection and control network monitor system and main program, subroutine and so on. At the same time, this paper expounded the design methods of temperature acquisition, calculation and display. It used the thermistor temperature sensor to measure real-time temperature of the periphery environment, and voltage change that transformed from the measured temperature was transmitted to ADE0708 converter for modulus conversion, and the number was input to the serial interface and dealt with computer software to output conversion by SCM, digital tube was displayed in digital sections, it was the real-time temperature value. According to the converter channel port it could set output driving control signal, the display light had status indication and adjustment and control.

Application of a Continuous Temperature Monitoring System among Healthcare Workers During the COVID-19 Pandemic: Prospective Cohort Study (Preprint)

2020 ◽  
Author(s):  
Chun-Yin Yeh ◽  
Yen-Chin Chen ◽  
Yi-Ting Chung ◽  
Chang-Chun Chen ◽  
Bo-Heng Chen ◽  
...  
Keyword(s):  
Heart Rate ◽  
Cohort Study ◽  
Body Temperature ◽  
Monitoring System ◽  
Body Surface ◽  
Prospective Cohort ◽  
Healthcare Workers ◽  
Temperature Monitoring ◽  
Body Surface Temperature ◽  
Continuous Temperature

BACKGROUND Healthcare workers (HCWs) are recommended to measure their body temperature every 8 hours to reduce the risk of cross infections during the COVID-19 pandemic in Taiwan. However, temperature reporting accuracy among HCWs is difficult to attain due to busy working schedules and high chances of human errors. OBJECTIVE This study describes the application of a continuous temperature monitoring system (HEARThermo Care AI.) based on the Internet of Things (IoT) among HCWs in hospitals during the COVID-19 outbreak. METHODS A prospective cohort study was conducted among HCWs in a major tertiary hospital in southern Taiwan. HCWs participated in this study wore HEARThermo, an innovative wearable device used to measure body surface temperature and heart rate every 10s, to continue monitoring their body surface temperature and heart rate during working hours. The HEARThermo Care AI. system combined with the routine body temperature measurement flow were used to automatedly notify the manager about the HCWs with fever risks. The completion rate of body temperature measurements was calculated as the number of HCWs using the continuous temperature monitoring system divided by the number of HCWs on duty. RESULTS A total of 52 HCWs (medical doctors, nurses, and interns) working in the medical ward between April 22 and June 30, 2020, voluntarily participated. The completion rate of body temperature measurements increased from 77.7% to 85% among HCWs in hospitals using HEARThermo Care AI. system. All the HCWs who received warning messages were reconfirmed by their managers and found they had discomforts at that time. CONCLUSIONS The application of the continuous temperature monitoring system serves as a solution to early identify HCWs suspected of having discomforts during the COVID-19 pandemic.

scholarly journals Fabrication of freestanding Pt nanowires for use as thermal anemometry probes in turbulence measurements

2021 ◽  
Vol 7 (1) ◽  
Author(s):  
Hai Le-The ◽  
Christian Küchler ◽  
Albert van den Berg ◽  
Eberhard Bodenschatz ◽  
Detlef Lohse ◽  
...  
Keyword(s):  
Room Temperature ◽  
Fluid Velocity ◽  
Current Mode ◽  
Constant Current ◽  
Small Scale ◽  
Turbulence Measurements ◽  
High Dynamic ◽  
Scale Turbulence ◽  
Constant Current Mode ◽  
Pt Nanowires

AbstractWe report a robust fabrication method for patterning freestanding Pt nanowires for use as thermal anemometry probes for small-scale turbulence measurements. Using e-beam lithography, high aspect ratio Pt nanowires (~300 nm width, ~70 µm length, ~100 nm thickness) were patterned on the surface of oxidized silicon (Si) wafers. Combining wet etching processes with dry etching processes, these Pt nanowires were successfully released, rendering them freestanding between two silicon dioxide (SiO2) beams supported on Si cantilevers. Moreover, the unique design of the bridge holding the device allowed gentle release of the device without damaging the Pt nanowires. The total fabrication time was minimized by restricting the use of e-beam lithography to the patterning of the Pt nanowires, while standard photolithography was employed for other parts of the devices. We demonstrate that the fabricated sensors are suitable for turbulence measurements when operated in constant-current mode. A robust calibration between the output voltage and the fluid velocity was established over the velocity range from 0.5 to 5 m s−1 in a SF6 atmosphere at a pressure of 2 bar and a temperature of 21 °C. The sensing signal from the nanowires showed negligible drift over a period of several hours. Moreover, we confirmed that the nanowires can withstand high dynamic pressures by testing them in air at room temperature for velocities up to 55 m s−1.

scholarly journals Distributed Thermistor for Continuous Temperature Monitoring of Malnourished Infants at Risk for Hypothermia

2017 ◽  
Vol 83 (1) ◽  
pp. 9
Author(s):  
M. David ◽  
A.A. Muelenaer ◽  
P. Muelenaer ◽  
J. Bird ◽  
S. Vespa ◽  
...  
Keyword(s):  
At Risk ◽  
Temperature Monitoring ◽  
Continuous Temperature

Design of Temperature Monitoring System Based on MSP430

2011 ◽  
Vol 301-303 ◽  
pp. 1162-1165
Author(s):  
Fei Hu ◽  
Wen Qing Yin ◽  
Cai Rong Chen
Keyword(s):  
Monitoring System ◽  
Simple Structure ◽  
High Accuracy ◽  
Temperature Monitoring ◽  
Low Power Consumption ◽  
Key Factors ◽  
Process Data ◽  
Long Distance ◽  
Fast Acquisition ◽  
Digital Temperature Sensor

The Greenhouse Temperature Is one of the Key Factors for Controlling the Growth of Crops. Traditional Methods of Temperature Monitoring Can Not Meet the Modern Greenhouse Requirements of High Accuracy, Fast Acquisition and Response. a Greenhouse Temperature Monitoring System Based on MSP430 Was Designed. this System Uses Digital Temperature Sensor DS18B20 to Measure Temperature, MSP430 to Process Data and Transmit Data to the Host Computer through RS485 Bus, Realizing the Real-Time Detection and Long-Distance Transmission of Greenhouse Temperature. this System Has the Features of Simple Structure, Low Power Consumption, Stability and Strong Portability Etc.

A Radiofrequency Identification (RFID) Temperature-Monitoring System for Extended Maintenance of Nuclear Materials Packaging

2009 ◽  
Author(s):  
Kun Chen ◽  
Hanchung Tsai ◽  
Bud Fabian ◽  
Yung Liu ◽  
James Shuler
Keyword(s):  
Monitoring System ◽  
National Laboratory ◽  
Argonne National Laboratory ◽  
Text Message ◽  
Cost Savings ◽  
Nuclear Material ◽  
Temperature Monitoring ◽  
Department Of Energy ◽  
Application Software ◽  
Radiofrequency Identification

A temperature-monitoring system based on radiofrequency identification (RFID) has been developed for extending the maintenance period of the nuclear material packaging for storage and transportation. The system consists of tags, readers, and application software. The tag, equipped with a temperature sensor, is attached to the exterior of a package. The application software enables remote reading, via radio waves, of the temperature from the sensor in the tag. The system reports any temperature violations immediately via e-mail or text message, and/or posts the alarm on a secure website. The system can monitor thousands of packages and record individual temperature histories in a database. The first type of packaging that will benefit from the RFID technology is Model 9977, which has been certified by the U.S. Department of Energy (DOE) to ship and store fissile materials such as plutonium and uranium. The recorded data can be correlated to the temperature of the containment O-ring seals, based on the decay heat load of the contents. Accelerated aging studies of the Viton® GLT O-rings have shown that temperature is one of the key parameters governing the life of the O-ring seals, which maintain the integrity of the containment boundary of the package. Use of the RFID temperature-monitoring system to verify that the surface temperature remains below a certain threshold will make it possible to extend the leak-test period of the package from one year to up to five years. The longer leak-rate testing interval will yield a cost savings of up to $10,000 per package over five years. This work was conducted by Argonne National Laboratory in support of the DOE Packaging Certification Program, Office of Environmental Management, Office of Packaging and Transportation (EM-63).

scholarly journals A Novel Wearable Device for Continuous Temperature Monitoring & Fever Detection

2021 ◽  
Vol 9 ◽  
pp. 1-7
Author(s):  
Nishant Verma ◽  
Iman Haji-Abolhassani ◽  
Suhas Ganesh ◽  
Jesus Vera-Aguilera ◽  
Jonas Paludo ◽  
...  
Keyword(s):  
Temperature Monitoring ◽  
Wearable Device ◽  
Continuous Temperature
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