It is not thanks to a newthat your mobile phone could turn into a real mini laboratory but thanks … to its vibrate mode. Yandao Huang, from the University of Shenzhen in China, has to measure the of a thanks to from the phone. However, the viscosity of a liquid is an incredibly precise indicator for identifying the properties of a liquid. It is particularly affected by , the or the filth of , this would allow . It is even possible to measure the levels of or , which could lead to “homemade” urine tests to detect kidney disease or perform .
Concretely, the researchers printed a cupthat they put on a 7 in vibrate mode. then measured the viscosity of the liquid using the amplitude of the waves and their rate of decay. “ We were able to distinguish thirty types of liquids with an average accuracy of more than 95% », Welcomes Yandao Huang in the .
However, we are still far from a practical application. The first step is to eliminate the “noise” of vibrations generated by the phone itself. It is then necessary to control the temperature very strictly, because this one is likely to vary the viscosity. The mathematical model must also be readjusted according to theand the size of the container. Finally, the system has difficulty identifying mixed liquids, such as milk mixed with coffee. But by combining this detection method with other indices (eg surface tension), we could end up with much more robust measurements, says Yandao Huang.