Wearable electrodes have been used to monitor heart rate and other key health signals in recent years, and new generation devices will use lighter, more flexible materials to adhere directly to the skin for better sensitivity. More accurate measurements. However, although ultra-thin films and rubber sheets used on such devices can be well fitted to the skin, these materials are poorly breathable and are considered to be insufficiently safe for long-term use. Skin tests have shown that high-quality, stretchable materials prevent sweating, skin opacity, and irritation or inflammation, which can have sustained physiological or psychological effects. Let's take a look at the related content with the network communication Xiaobian.
The University of Tokyo in Japan has released an allergy-free electronic sensor that can be worn on the skin of the back of the hand for several weeks without any discomfort, because it will be so thin that you forget it. This stretchable electrode consists of a permeable, nano-network that promises to develop non-invasive electronic skin devices that continuously monitor people's health over time.
The nano-electrode fits snugly against the contour of the back of the hand and fits snugly against the skin. This stretchable device allows the skin to breathe naturally, it is so thin that the wearer even forgets its existence
“We understand that in medical and sports applications, equipment that can be continuously monitored for a week or more has practical use,†said Professor Takao Someya from the University of Tokyo's School of Engineering. His team has previously developed skin patches that measure oxygen levels in the blood.
In the current study, the team developed an electrode consisting of a nano-network containing water-soluble polymers, polyvinyl alcohol (PVA), and gold nano-layer materials that have been confirmed to be compatible with organisms. And safe. The device's configuration requires only a little water to dissolve the PVA nanofibers and allows it to simply adhere to the skin surface. It is completely seamless to the surface of the skin, including the area of ​​the sweat glands or the fingerprints of the index finger.
Nanomesh sensor that can completely conform to the skin surface and its microstructure display
The researchers then tested the skin patch for its irritancy and sensitization and found no inflammatory response after one week of wearing the subject. The team also evaluated its permeability with water vapor, which shows superior gas permeability compared to ultra-thin plastic films and rubber sheets.
In addition, the scientists verified the durability of the device with over 10,000 repeated bends and stretches. They also compared it to a conventional gel electrode to verify the reliability of the device as an electrically active recording electrode.
“It is possible to monitor a user's vital signs without causing any stress or discomfort,†some said to the team's future research. In addition to nursing and medical applications, the new device promises to continuously and accurately monitor athletes' physiological signals and body movements without hindering their training or performance.
The above is about the future of network communication - breathable wearable skin sensor for long-term health monitoring. If you want to know more information, please pay attention to eeworld, eeworld electronic engineering will provide you with more complete, more detailed, Updated information.
Fire Resistant Network Cable is the most commonly used twisted-pair cable flame retardant grade, its test standard is UL 1581.
So the CM level cable fire characteristic is as follows: not spontaneous combustion; In the flame will smoke, and may appear flame; The speed of flame spread along the cable is very slow; When the external fire source is cut off, the fire on the cable will gradually go out.
CM class cables do not take into account smoke density and toxicity (no mention of smoke density and toxicity in UL 1581) as long as they meet flame retardant rating requirements.Cm-level cables are mostly horizontal twisted-pair and are used in wiring subsystems.The sheath layer of CM class cable is mostly PVC material, while the insulation layer is high-density PE material.The advantage is that it is cheap, while the disadvantage is that the ignition point is low, the normal operating temperature is below 70℃, when the temperature reaches 160℃ or higher, THE PVC material will emit toxic halogen and smoke.
If you burn it, you release a lot of heat.According to the code of construction for integrated wiring, twisted pair wires shall be laid through metal pipes and behind metal Bridges in floors, ceilings and walls.In this case, the use of ordinary twisted-pair wire can be installed in any situation without concern for smoke and toxicity.
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