EPFL researchers from the Photonic Materials and Fiber Optic Equipment Laboratory have developed a new technology that can be used to detect body movements. The researchers say this breakthrough could lead to clothing or bed sheets that can monitor breathing and other important movements. This electronic fiber can also be used to make robots interact with humans more safely and intuitively.
The researchers said that the soft transmission line they developed opened the door to these possibilities. These sensors can simultaneously track the deformation of multiple fabrics, such as stretch, pressure and torque. The team said that it is difficult for the sensor to measure multiple stimuli at the same time. The team combined the concept of reflexology to create a sensor in the shape of a soft fiber that opens the door to smart textiles.
Researchers say that this technology works similar to radar, but emits electrical pulses instead of electromagnetic waves. The working principle of these fibers is similar to a transmission line. The system can measure the time between when a signal is sent and when it is received. This difference can determine the exact location, type and strength of the deformation.
The researchers say that this particular detection technique has never been used in structures that combine extended mechanical flexibility and high electronic performance. The team stated that their trick is to use a simple method with a scalable ability to create transmission lines made entirely of soft materials. The next step will be to make the technology more portable by reducing the footprint of peripheral electronic components.
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