Design of Temperature Monitoring System with Low Power Consumption for High Voltage Electrical Equipment

2018 ◽  
pp. 173-180
Author(s):  
Hongqing Wang ◽  
Minjie Zhu ◽  
Yining Bi ◽  
Xiaohui Liu ◽  
Haiping Ma
Keyword(s):  
Power Consumption ◽  
Low Power ◽  
Monitoring System ◽  
High Voltage ◽  
Electrical Equipment ◽  
Temperature Monitoring ◽  
Low Power Consumption

A Portable and High-Resolution System for Sleep Apnea Monitoring

2013 ◽  
Vol 753-755 ◽  
pp. 2369-2373
Author(s):  
Yu Xuan Hu ◽  
Yi Hu ◽  
Shu Ming Ye ◽  
Xiao Xiang Zheng
Keyword(s):  
Sleep Apnea ◽  
High Resolution ◽  
Power Consumption ◽  
Low Power ◽  
Monitoring System ◽  
Sleep Apnea Syndrome ◽  
Low Power Consumption ◽  
Practical Applications ◽  
Obstructive Sleep ◽  
Apnea Monitoring

As a major indicator of Obstructive Sleep Apnea Syndrome (OSAS) in clinical diagnosis, the monitoring of sleep apnea plays an important role in medical treatments of modern society. This paper proposes a portable sleep apnea monitoring system, which is of high-precision and low-power consumption, and capable of performing the long-term monitoring of OSAS patients multiple physiological parameters in clinical treatments. In the system, the AC modulated detection is adopted, and low amplification ratios are utilized in forestage and a high-resolution AD converter is designed in post-stages. Thus, it is able to acquire, analyze, and process physiological signals in real-time. In addition, ultralow-power chips are used in control system to save the power consumption. The experimental results show that our monitoring system has the strengths of high stability, low-power consumption (peak current90mA), and strong anti-interference ability, which demonstrates the potential in practical applications.

scholarly journals A System for Monitoring Breathing Activity Using an Ultrasonic Radar Detection with Low Power Consumption

2019 ◽  
Vol 8 (2) ◽  
pp. 32 ◽  
Author(s):  
Ali Al-Naji ◽  
Ali J. Al-Askery ◽  
Sadik Kamel Gharghan ◽  
Javaan Chahl
Keyword(s):  
Power Consumption ◽  
Low Power ◽  
Monitoring System ◽  
Life Time ◽  
Mobile Telephone ◽  
Physical Contact ◽  
Low Power Consumption ◽  
Battery Life ◽  
Radar Detection ◽  
Abnormal Breathing

Continuous monitoring of breathing activity plays a major role in detecting and classifying a breathing abnormality. This work aims to facilitate detection of abnormal breathing syndromes, including tachypnea, bradypnea, central apnea, and irregular breathing by tracking of thorax movement resulting from respiratory rhythms based on ultrasonic radar detection. This paper proposes a non-contact, non-invasive, low cost, low power consumption, portable, and precise system for simultaneous monitoring of normal and abnormal breathing activity in real-time using an ultrasonic PING sensor and microcontroller PIC18F452. Moreover, the obtained abnormal breathing syndrome is reported to the concerned physician’s mobile telephone through a global system for mobile communication (GSM) modem to handle the case depending on the patient’s emergency condition. In addition, the power consumption of the proposed monitoring system is reduced via a duty cycle using an energy-efficient sleep/wake scheme. Experiments were conducted on 12 participants without any physical contact at different distances of 0.5, 1, 2, and 3 m and the breathing rates measured with the proposed system were then compared with those measured by a piezo respiratory belt transducer. The experimental results illustrate the feasibility of the proposed system to extract breathing rate and detect the related abnormal breathing syndromes with a high degree of agreement, strong correlation coefficient, and low error ratio. The results also showed that the total current consumption of the proposed monitoring system based on the sleep/wake scheme was 6.936 mA compared to 321.75 mA when the traditional operation was used instead. Consequently, this led to a 97.8% of power savings and extended the battery life time from 8 h to approximately 370 h. The proposed monitoring system could be used in both clinical and home settings.

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