A Low-Cost Flexible Perforated Respiratory Sensor Based on Platinum for Continuous Respiratory Monitoring

Monitoring sleep conditions is of importance for sleep quality evaluation and sleep disease diagnosis. Accurate respiration detection provides key information about sleep conditions. Here, we propose a perforated temperature sensor that can be worn below the nasal cavity to monitor breath. The sensi...

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Bibliographic Details
Published in:Micromachines (Basel) 2022-10, Vol.13 (10), p.1743
Main Authors: Cao, Lu, Zhang, Zhitong, Li, Junshi, Wang, Zhongyan, Ren, Yingjie, Wang, Qining, Huang, Dong, Li, Zhihong
Format: Article
Language:English
Subjects:
Algorithms
Breathing
Chemical vapor deposition
Design
Heat conductivity
Humidity
Low cost
Lung diseases, Obstructive
Microelectromechanical systems
Micromachining
Monitoring
Nose
Physiological aspects
Physiology
Post-traumatic stress disorder
Quality assessment
Respiration
Respiratory agents
respiratory sensor
Response time
Room temperature
Sensitivity enhancement
Sensors
Signal processing
Sleep
sleep monitoring
Stress
temperature
Temperature sensors
wearable device
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Summary:Monitoring sleep conditions is of importance for sleep quality evaluation and sleep disease diagnosis. Accurate respiration detection provides key information about sleep conditions. Here, we propose a perforated temperature sensor that can be worn below the nasal cavity to monitor breath. The sensing system consists of two perforated temperature sensors, signal conditioning circuits, a transmission module, and a supporting analysis algorithm. The perforated structure effectively enhances the sensitivity of the system and shortens the response time. The sensor’s response time is 0.07 s in air and sensitivity is 1.4‰°C−1. The device can achieve a monitoring respiratory temperature range between normal room temperature and 40 °C. The simple and standard micromachining process ensures low cost and high reproducibility. We achieved the monitoring of different breathing patterns, such as normal breathing, panting, and apnea, which can be applied to sleep breath monitoring and exercise information recording.
ISSN:2072-666X
2072-666X
DOI:10.3390/mi13101743