Theoretical analysis of a microstructured fiber temperature sensor based on a Sagnac interferometer with a wide temperature measurement range

2021 ◽  
Vol 43 ◽  
pp. 100858
Author(s):  
Hongyu Li ◽  
Shuguang Li ◽  
Shun Wang ◽  
Song Zhang
Keyword(s):  
Theoretical Analysis ◽  
Temperature Measurement ◽  
Temperature Sensor ◽  
Measurement Range ◽  
Sagnac Interferometer ◽  
Microstructured Fiber

Wireless Temperature Measurement and Alarm Device Based on Single Bus Digital Temperature Sensor

2011 ◽  
Vol 135-136 ◽  
pp. 1129-1133 ◽  
Author(s):  
Li Mei Dong
Keyword(s):  
Ambient Temperature ◽  
Temperature Measurement ◽  
Temperature Sensor ◽  
Measurement Accuracy ◽  
Measurement Range ◽  
Alarm System ◽  
Measurement Circuit ◽  
Temperature Detection ◽  
Alarm Limit ◽  
Digital Temperature Sensor

AT89S52 microcontroller was the center controler for wireless temperature measurement and alarm system, through temperature measurement circuit and remote wireless alarm circuit, realized the temperature detection and off-limit alarm of the ambient temperature. The system was composed of temperature acquisition circuit, display circuit and alarm circuit. Temperature sensor was DS18B20, real-time temperature displayed via LED displayer. Users can customize the alarm lower limit and superior limit. when the ambient temperature exceeds the alarm limit, the microcontroller will start the sound and light alarm, and remote wireless alarm. Temperature measurement range from -40 °C to +85 °C, measurement accuracy is 0.5 °C, wireless alarm distance is up to 100 meters. This system is of high precision, wide temperature measurement, and timely alarm.

scholarly journals Temperature Sensor Based on an Asymmetric Two-Hole Fiber Using a Sagnac Interferometer

2018 ◽  
Vol 2018 ◽  
pp. 1-6 ◽  
Author(s):  
René Domínguez-Cruz ◽  
Daniel A. May-Arrioja ◽  
Rodolfo Martínez-Manuel ◽  
Daniel Lopez-Cortes
Keyword(s):  
Temperature Difference ◽  
Temperature Sensor ◽  
Linear Response ◽  
Silica Fiber ◽  
Wavelength Shift ◽  
Sagnac Interferometer ◽  
Microstructured Fiber ◽  
Microstructured Fibers ◽  
Transverse Geometry ◽  
Transmitted Spectrum

We report in this paper a temperature sensor based on an asymmetric two-hole fiber (ATHF) using a Sagnac interferometer (SI) configuration. The operation principle is based on the birefringence change induced by the temperature difference between the air holes and the silica fiber. As a result, the transmitted spectrum of the SI exhibits a sinusoidal profile which is shifted when the temperature is increased. A linear wavelength shift as a function of temperature is observed, and a sensitivity of 2.22 nm/°C was achieved using a 2 m long asymmetric THF, which is in the same order as those previously reported using similar microstructured fibers. The advantage of this system is a linear response, the use of a microstructured fiber with a simpler transverse geometry, and the use of bigger holes which can facilitate the insertion of several materials and improve the sensitivity of the sensor for different applications.

A temperature sensor based on flexible substrate with ultra-high sensitivity for low temperature measurement

2020 ◽  
Vol 315 ◽  
pp. 112341
Author(s):  
Zhaojun Liu ◽  
Bian Tian ◽  
Xu Fan ◽  
Jiangjiang Liu ◽  
Zhongkai Zhang ◽  
...  
Keyword(s):  
Low Temperature ◽  
Temperature Measurement ◽  
Temperature Sensor ◽  
Flexible Substrate ◽  
High Sensitivity

The Study and Application of the Nitrile Gloves’ Production Line’s Online Measurement

2015 ◽  
Vol 727-728 ◽  
pp. 804-808
Author(s):  
Jian Jun Cai ◽  
Jian Bing Han ◽  
Su Qin Qu
Keyword(s):  
Temperature Measurement ◽  
Real Time ◽  
Temperature Sensor ◽  
Production Line ◽  
Moving Objects ◽  
Mold Temperature ◽  
Configuration Software ◽  
Online Measurement ◽  
Line Process ◽  
Tracking Technology

In order to solve the problem of the hand module’s online temperature measurement in Nitrile glove production line process, we have developed a set of moving objects or device used for online temperature measurement. The device is mounted infrared temperature sensor, by using PLC-controlled synchronous tracking technology it can track the hand module in the production line, so it can ensure the infrared temperature sensor and hand module synchronously measure its temperature correctly. By using configuration software kingview, we have developed mold temperature monitoring online measurement interface, real-time monitoring of the mold temperature opponents. After analysis of experimental results we concluded that the device work stable, acquisition of temperature reliably, so it has a promotional value.

Rancang Bangun Pengukur Suhu Tubuh Dengan Multi Sensor Untuk Mencegah Penyebaran Covid-19

2021 ◽  
Vol 5 (3) ◽  
pp. 543-549
Author(s):  
Helmy Yudhistira Putra ◽  
Utomo Budiyanto
Keyword(s):  
Body Temperature ◽  
Temperature Measurement ◽  
Temperature Sensor ◽  
The Body ◽  
Body Temperatures ◽  
Heat Measurement ◽  
Turn On ◽  
Measurement Results ◽  
Door Lock ◽  
Body Heat

During the COVID-19 pandemic, the price of preventive equipment such as masks and hand sanitizers has increased significantly. Likewise, thermometers are experiencing an increase and scarcity, this tool is also sought after by many companies for screening employees and guests before entering the building to detect body temperatures that are suspected of being positive for COVID-19. The use of a thermometer operated by humans is very risky because dealing directly with people who could be ODP (People Under Monitoring/Suscpected ) or even positive for COVID-19, therefore we need tools for automatic body temperature screening and do not involve humans for the examination. This research uses the MLX-90614 body temperature sensor equipped with an ultrasonic support sensor to detect movement and measure the distance between the forehead and the temperature sensor so that the body heat measurement works optimally, and a 16x2 LCD to display the temperature measurement results. If the measured body temperature is more than 37.5 ° C degrees Celsius then the buzzer will turn on and the selenoid door lock will not open and will send a notification to the Telegram messaging application. The final result obtained is the formation of a prototype device for measuring body temperature automatically without the need to involve humans in measuring body temperature to control people who want to enter the building so as to reduce the risk of COVID-19 transmission

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