[PConline News] At this year's CES, a wireless sensor patch uses a new power supply method. This sensor can monitor your body's moisture content and transfer data to your phone. The point is that the energy it needs is entirely from your body's calories.
Due to the temperature difference between the body and the air, thermoelectric materials can convert temperature differences into electrical energy. The ASSIST project from North Carolina State University has been investigating flexible wearable thermoelectric materials. The prototype in the picture was developed by them.
This small patch, about 7 square centimeters, can produce 40-50 microwatts of electricity per square centimeter when placed close to the skin. How much electricity depends on the temperature difference between the skin and air, 40-50 microwatts / cm only 3 degrees temperature difference can be. If there is an air flow (such as walking or running), the efficiency of power generation will be greatly increased, resulting in about 3 times the power.
The power generated by this sensor can not drive the screen or GPS, but it can support some low-power chips and sensors, such as accelerometers, temperature sensors, pressure sensors. In addition, wireless transmission capabilities are also under study. Developers are developing an ultra-low-power Bluetooth standard for data transmission so that sensors can communicate with mobile phones.
The goal of the ASSIST project is to create self-powered wearable sensors that users can wear for up to one year without having to take them off. Research is currently focused on how to obtain maximum energy without sacrificing sensor quality. Researchers said that this product is nearing mass production, and then they will look for partners to authorize this technology to achieve mass production.
Comments: A step closer to the use of the human body as a battery in the "Matrix".
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