Sleep with sensors

Textiles with integrated sleep-monitoring sensors... 

Ye, W., Heidemann, J., Estrin, D. (2004). Medium access control with coordinated, adaptive sleeping forwireless sensor networks. lEEE/ACM Transactions on Networking, 72(3), 493-506. doi 10.1109/TNET.2004.828953... 

Power is normally required to capture responses of the sensor, process and transmit data. While training in a physiological laboratory allows for sensor systems to be electrically supplied by the mains, in the field, power is best supplied by a disposable or rechargeable battery incorporated with the other electronic components of the system. Few sports applications require sleep phases, when the sensors are not required to be active. For most sports, the power requirements in use, whether for training or competition, are continuous but limited to hours as opposed to days. Thus, compared to medical sensors where data sometimes need to be gathered over several days, the power requirements are less stringent, which helps reduce the overall weight of the sensor system. 

The square mark stands for the beginning of the mission (t = Oh), the diamond mark stands for the end (/ = 4380A). Component 16 has too high RRW and RA W values to be represented in Fig. 10 with the same scale. Component 16 is the sink node in this study and then the most important one from a sensitivity viewpoint. The first step is to schedule sleeping of redundant covering sensors i.e. 10, 11, 14 and 15. 

Conductive tape (Courtesy of Bally Ribbon Mills) is used to neutralize the static electricity and EMI shielding. An elastic webbing (Courtesy of Bally Ribbon Mills) with cable has been used for undersea communication. Physiological sensors and other sensors have been incorporated into textile substrate to monitor heart rate, skin temperature, movement and respiration, and muscle activity for medical and sports applications. RIP (respiratory inductance plethysmography) belts (Courtesy of Natus Neurology Incorporated) are used for sleep apnea monitoring. A conductive belt is used to make electrodes for EEC and other medical applications. A 3D conductive webbing (Courtesy of Bally Ribbon Mills) is also used as ON and OFF switch. 

Senn O, Clarenbach CF, Kaplan V, et al. Monitoring Carbon Dioxide Tension and arterial oxygen saturation by a single earlobe sensor in patients with critical illness or sleep apnea. Chest 2005 128 1291-1296. 

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