Generally speaking, the principle of heart rate monitoring is usually divided into three kinds: one is the photoelectric transmission measurement method, which in principle means that the sensor of the bracelet in contact with the skin will emit a beam of light hitting the skin, and measure the reflected/transmitted light. Because blood absorbs a specific wavelength of light, every time the heart pumps blood, that wavelength is absorbed in large quantities, and in this way the heartbeat can be determined. The downside, however, is that it consumes a lot of power and can be interfered with by ambient light. Most of the smart bracelets or watches on the market today monitor heart rate using the photoelectric transmission measurement method.
There is also a way to test the ECG signal method, the sensor of the bracelet can measure the electrical signal of the contraction of the heart muscle to determine the user's heart rate, the principle and ECG similar principle. The disadvantage is that the circuit is more complex, occupies more PCB space, is susceptible to electromagnetic interference, while the sensor must be close to the skin, placed in a relatively fixed position, so it is difficult to have a bracelet using this measurement method.
In addition to this, there are vibration measurements, which have only recently come out. Because each heartbeat will cause the body to vibrate, through high-precision . Sensors capture this vibration, and then after signal processing can get the heartbeat, in general, intelligent cushion or intelligent massager products will be used in this measurement method, the bracelet is less common.
How accurate is the heart rate bracelet
Accuracy, in fact, I've already mentioned, most of the bracelet used by the photoelectric transmission measurement method is not very accurate, it is easy to be disturbed by the external environment, for individuals, the importance of the bracelet heart rate monitoring is actually a continuous monitoring, even if the absolute value is not allowed, but the relative trend of changes in the analysis of some of the value of the bracelet can still be found. The main reason for this is that it's not a good idea to have a good time.
Whether the bracelet can do real-time dynamic ECG measurements
One-handed bracelets can't measure ECG because the simplest single-conductor ECG requires at least one electrode on each side of the body. Of course, technically speaking, an ECG bracelet is perfectly feasible, but it may require the user to wear a bracelet on both the left and right hand. In fact, from life, we simply do not need to see their own ECG in real time, to be able to see the heart rate for a period of time the state of change can be.
Can measure the heart rate of the bracelet worthWith the rise of smart wearable devices, more and more manufacturers to join the smart wearable market in the melee, the first to carry out is the price war, the threshold of the bracelet is low, naturally, will attract a part of the user's attention, in the face of some of the less than one hundred dollars can test the heart rate of the product, I believe that many of my friends first reaction is so cheap, in the end, reliable, in the end, is it worth buying? The first thing I'd like to say is that I'm not sure if I'm going to be able to buy one of these.
On the question of reliability, as I mentioned before, the bracelet heart rate measurement, itself is not very accurate, its significance is only to allow people to understand the trend of their own state, and many bracelets are only practical to do this, and not much extension. So if you really want to discuss whether it's worth buying, I think, if you simply want to experience, or want to use it as a toy, spend a low price to buy one to play or can, if you really expect it to assist you in treating or preventing disease, that or forget it.
From the current stage, even though the future of smart bracelets is bright, it has to be said that the emergence of the heart rate monitoring function, its gimmick is far greater than the actual utility, with the vernacular, the average user knows their own heart rate status of the use of it? They don't have a doctor on their side to provide real-time advice, and the bracelet often doesn't provide users with some constructive guidance. Looking at the heart rate on the phone, what we can know is probably just a set of numbers, and a state chart.
In fact, smart bracelet manufacturers should pay more attention to the ecosystem, if the smart bracelet APP can integrate some medical platforms, such as customized private doctors and so on, then it is also considered to be the people's move, I believe there will be a lot of people pay for it, but unfortunately, to do this, it should cost a lot of resources, and the real implementation of the implementation of the should be to wait for a long time. Of course, I'm just offering an idea. What kind of expectations do you have for smart devices to assist with your health?