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Foreign developed by sweat and pulse wireless sensors, RFID monitoring can be attached with a skin

by:JLTcard     2020-11-21
Recently, Stanford university and the university of Berkeley separately studied the two sensors can stick on the skin directly, very light weight, and can carry out wireless sensor, collection of complex physiological data. Both sensor does not require an external circuit connection, through internal current and metallic ink contact changes, to transmit a signal to the processor. They can not affect people's normal movement under the condition of accurate monitoring body changes, analysis and data processing. Wireless patch type sensor is optimized in shape, stick on the skin will not affect the human body normal movement. At the same time, without the distraction of the lines to reduce the chances of the sensor failure, improve the efficiency. Two college research for human physiological data collection and analysis provides a more efficient way, this paper will detail the two wireless sensor technology principle and application direction. A, 'band-aid' sensor without movement interference Stanford elastic 'BodyNet' wireless sensor is made of metal printing ink coverage on the flexible material, similar to the shape of a band-aid. The sensors and the use of micro accelerometer or optical techniques to track the body cell phones and smart watch is different, its tensile and compression system depends on the sensor itself, an electric current passes through these movements cause small changes when flowing through the metal ink, these changes will be passed to the nearby processors. If the BodyNet like a sticker on the joints, whether it can report the joints bend, bending, and how much. Sensor system is very sensitive and can detect heartbeats when skin through subtle changes, or with breathing to produce a wider range of changes. The skin sensor is through radio frequency identification technology ( RFID) Retrieve data, it is a non-contact automatic identification technology, through radio frequency signal automatically identify target and get the relevant data, without human intervention. Sensors in the metal conductive ink, current flows through the surrounding will produce electromagnetic fields, high frequency electromagnetic wave signals can transmit over a long distance. Radio frequency system through the identification of electromagnetic wave magnetic field changes the electronic tag information, passive electronic tag through the electromagnetic field to provide energy. In the 90 s, the sensors to obtain information from the human skin, must through the connecting wires, but when the wire bending as human body cannot work normally occurs, the efficiency will plummet. The second part of the skin sensor, miniaturization is the receiver, its function is to collect sensor signals, and to transmit it to the phone or other devices. Although now have similar device can clip on clothes, but still don't use the monitoring physiological data in the gym. Stanford university professor, said they will create a systemic skin sensor array, can not interfere with the normal movement of people to collect physiological data. Second, sweat monitoring sensor can be attached to the body at the university of Berkeley have a similar research project, the researchers have been studying a sweat monitor, can monitor a variety of physiological factors. Normally, sweat monitor every 15 minutes to collect sweat, and then to carry on analysis. But this analysis monitor can't sweat in a minute or a shorter period of time change, they are studying how to sweat collection and analysis system is focused on the skin. Recently, the university of California to begin mass user testing of the sensors, sweat can provide a variety of physiological data measurement. Skin, head of the sensor, a professor at the university of Berkeley Ali Javey said that the goal of this project is not only manufacture sensor, but a beginning for more topics of study, and see what can you tell us sweat. He said: 'decoding sweat ingredient needs reliable and repeatable sensors, we can make in proportion, multiple sensors are placed in different parts of the body, and use them for different research objects. 'From a handmade prototype to mass production model is a huge challenge. Berkeley research team found the Finnish national technology research center ( VTT) Help them to solve the problem of batch production. For flat, relatively simple electronics, scroll type technology is most appropriate. It is essentially to print the sensor directly to the flexible plastic substrate, and then simply by size cutting. In this way, can have the effect of lower costs, making hundreds of thousands of sensors in a short time, make the scale deployment easier. Conclusion: the skin sensor will enter more life scenes can stick on the skin sensor for the study of the human body physiological data provides a more convenient way. Patch type sensor can be placed in different parts of the body, according to different research projects to provide more accurate data. Skin without connection wire sensors can into our life more convenient, also decreased because the line problem caused by the transmission signal interference. In the future the more flexible sensor may leave the lab, in hospital, the gym, and even family scenario. return
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