Xiaomi is known for being a company that uses highly innovative technology in the vast majority of its products, both in their Smartphones and sports devices, and today we are talking about the last one, more specifically about the Xiaomi Mi Band 3. It turns out that there is currently a small controversy with it, and it is that some tests were performed on the heart rate sensor of this device on a tissue paper and it turned out that the Smartband made a reading that was positive, as if the paper was alive and it had a heart beating inside.
The origin of the controversy of the Xiaomi Mi Band 3
First, we must remember that the Xiaomi Mi Band 3 was released in May of this year as the successor of the Xiaomi Mi Band 2, and despite the resounding success of this device, it had certain faults that were corrected with the arrival of the new generation of Smartbands. However, it turns out that some netizens discovered that this error happened when they tied the device directly to a roll of tissue paper, then many users began to perform the same test and several of them gave a heart rate reading. This originated in the Weibo social network where photos of what happened were originally shared.
This is quite strange because the heart rate reader uses a light to track the user’s blood, that is, an LED illuminates its capillaries and then a sensor adjacent to the light measures the frequency at which its blood passes, from this way it can be assured that it is a living being. However, we must also clarify that this is a general problem, because after having exploded this controversy, a photo of what appears to be a Fitbit Versa smartwatch was release, and it also gave a heart rate in the roll of tissue paper.
Many people have given their opinion on the case of the Xiaomi Mi Band 3; however, a biomedical engineer in China made a publication of an article on PPG giving his opinion, in which he says, “Just because it detects the heart rate in other objects does not necessarily mean that it doesn’t detect correctly your heart rate.” The engineer explained that these devices are not designed to verify if they are really tied to a wrist, their software has one objective: to detect the heart rate of a human wrist.
Other cases have also been reported, such as, for example, what is known about what was tested with a banana and a cup using an Apple Watch, a Ticwatch and even an Android Wear Smartwatch. The tests performed with these devices were also positive, that is, they showed a heart rate. Therefore, it is a problem that not only belongs to the Xiaomi Mi Band 3, it can also happen in any other type of watch or smartband.
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