scholarly journals A Novel Infrared Temperature Measurement with Dual Mode Modulation of Thermopile Sensor

Sensors ◽  
2019 ◽  
Vol 19 (2) ◽  
pp. 336 ◽  
Author(s):  
Chih-Hsiung Shen ◽  
Shu-Jung Chen ◽  
Yi-Ting Guo
Keyword(s):  
Thermal Radiation ◽  
Ambient Temperature ◽  
Temperature Compensation ◽  
Temperature Sensing ◽  
Target Temperature ◽  
Infrared Sensor ◽  
Dual Mode ◽  
Infrared Temperature Measurement ◽  
Chopper Amplifier ◽  
Thermopile Sensor

Superior to the traditional infrared temperature sensing architecture including infrared sensor and thermistor, we propose a novel sensing approach based on a single thermopile sensor with dual modes modulation. A switching and sensing circuit is proposed and realized with a chopper amplifier AD8551 and p-channel MOSFET (PMOS) for switching between detection of thermal radiation and the target and the ambient temperature for compensation. The error of target temperature after temperature compensation is estimated at less than 0.14 °C.

scholarly journals The Research of Temperature Compensation for Thermopile Sensor Based on Improved PSO-BP Algorithm

2015 ◽  
Vol 2015 ◽  
pp. 1-6 ◽  
Author(s):  
Yuanjiang Li ◽  
Yuehua Li ◽  
Feng Li ◽  
Bin Zhao ◽  
QingQing Li
Keyword(s):  
Neural Network ◽  
Thermal Radiation ◽  
Bp Neural Network ◽  
Temperature Compensation ◽  
Safety Monitoring ◽  
Bp Algorithm ◽  
Bp Network ◽  
The Core ◽  
Thermopile Sensor ◽  
Improved Pso

When thermopile sensor is used for safety monitoring of equipment in industrial environments, particularly for measuring the thermal radiation information of device, the measured result of this kind of sensor is usually affected by ambient temperature due to its unique structure. An improved PSO-BP algorithm is proposed for temperature compensation of thermopile sensor and correcting the error in the condition of the system accuracy requirements reduced by temperature. The core of improved PSO-BP algorithm is to improve the certainty of initial weights and thresholds that belonged to BP neural network and then train the samples by using BP neural network for enhancing the generalization ability and stability of system. The experimental results show that the proposed PSO-BP network outperforms other similar algorithms with faster convergence speed, lower errors, and higher accuracy.

A dual-mode electronic skin textile for pressure and temperature sensing

2021 ◽  
pp. 130599
Author(s):  
Yabing Wang ◽  
Miaomiao Zhu ◽  
Xuedian Wei ◽  
Jianyong Yu ◽  
Zhaoling Li ◽  
...  
Keyword(s):  
Temperature Sensing ◽  
Dual Mode ◽  
Electronic Skin

scholarly journals Ambient Temperature-Responsive Mechanisms Coordinate Regulation of Flowering Time

2018 ◽  
Vol 19 (10) ◽  
pp. 3196 ◽  
Author(s):  
Hendry Susila ◽  
Zeeshan Nasim ◽  
Ji Ahn
Keyword(s):  
Ambient Temperature ◽  
Flowering Time ◽  
Molecular Mechanisms ◽  
Protein Localization ◽  
Temperature Response ◽  
Histone Variants ◽  
Temperature Sensing ◽  
Future Research ◽  
Temperature Perception ◽  
Local Climate

In plants, environmental conditions such as temperature affect survival, growth, and fitness, particularly during key stages such as seedling growth and reproduction. To survive and thrive in changing conditions, plants have evolved adaptive responses that tightly regulate developmental processes such as hypocotyl elongation and flowering time in response to environmental temperature changes. Increases in temperature, coupled with increasing fluctuations in local climate and weather, severely affect our agricultural systems; therefore, understanding the mechanisms by which plants perceive and respond to temperature is critical for agricultural sustainability. In this review, we summarize recent findings on the molecular mechanisms of ambient temperature perception as well as possible temperature sensing components in plants. Based on recent publications, we highlight several temperature response mechanisms, including the deposition and eviction of histone variants, DNA methylation, alternative splicing, protein degradation, and protein localization. We discuss roles of each proposed temperature-sensing mechanism that affects plant development, with an emphasis on flowering time. Studies of plant ambient temperature responses are advancing rapidly, and this review provides insights for future research aimed at understanding the mechanisms of temperature perception and responses in plants.

scholarly journals Research on Temperature Compensation Method in Crankshaft Online Measurement System

2021 ◽  
Vol 11 (16) ◽  
pp. 7558
Author(s):  
Tingting Gu ◽  
Xiaoming Qian ◽  
Peihuang Lou
Keyword(s):  
Ambient Temperature ◽  
Measurement System ◽  
Temperature Compensation ◽  
Compensation Method ◽  
Displacement Sensor ◽  
Online Measurement ◽  
High Precision Measurement ◽  
Temperature Changes ◽  
Dragonfly Algorithm ◽  
Measuring Machine

The crankshaft online measurement system has realized the full inspection function with fast beats, at the same time it requires for high-precision measurement. Considering the effect of ambient temperature and temperature changes on measuring machine, the calibration part, the measured crankshaft and displacement sensor, a temperature compensation method is proposed. Firstly, relationship between calibration part and ambient temperature can be get through the zero calibration. Then use the material properties to obtain compensation values of the calibration part and the measured crankshaft part at different temperatures. Finally, the compensation parameters for displacement sensor can be obtained through the BP algorithm. The improved dragonfly algorithm (DA) is used to optimize the parameters of BP neural network algorithm. Experiments verify the effectiveness of IDA-BP for LVDT in temperature compensation. After temperature compensation, the error range of main journal radius is reduced from 0.0156 mm to 0.0028 mm, the residual error decreased from −0.0282 mm~+0.0018 mm to −0.0058 mm~−0.0008 mm. The influence of temperature changes on the measurement is reduced and measurement accuracy is improved through the temperature compensation method. The effectiveness of the method is proved.

scholarly journals A Non-Contact Integrated Body-Ambient Temperature Sensors Platform to Contrast COVID-19

Electronics ◽  
2020 ◽  
Vol 9 (10) ◽  
pp. 1658
Author(s):  
Sandra Costanzo ◽  
Alexandra Flores
Keyword(s):  
Body Temperature ◽  
Ambient Temperature ◽  
Direct Contact ◽  
Humidity Sensor ◽  
Temperature Sensors ◽  
Infrared Sensor ◽  
Infrared Thermometer ◽  
Simulation Results ◽  
Experimental Validations ◽  
Capacitive Humidity Sensor

An integrated sensors platform for non-contact temperature monitoring is proposed in this work. The adopted solution, based on the combined integration of an infrared thermometer and a capacitive humidity sensor, is able to provide a fast and accurate tool for remotely sensing both ambient and body temperature in the framework of pandemic situations, such as COVID-19, thus avoiding any direct contact with people. The information relative to the ambient temperature is successfully exploited to derive a correction formula for the accurate extraction of body temperature from the measurement provided by the standard infrared sensor. Full details on the design of the proposed platform are provided in the work, by reporting relevant simulation results on the variations of ambient temperature, relative humidity, and body temperature. Experimental validations are also discussed to provide a full assessment of the proposed approach.

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