Generally speaking, there are three ways to monitor heart rate:
One is photoelectric transmission measurement. In principle, the sensor that contacts the bracelet with the skin will emit a beam of light to irradiate the skin and measure the reflected/transmitted light. Because blood can absorb light with a specific wavelength, every time the heart pumps blood, this wavelength will be absorbed in large quantities, thus determining the heartbeat. But the disadvantage is that it consumes a lot of electricity and is disturbed by ambient light. At present, the function of monitoring heart rate of smart bracelets or watches on the market mostly adopts photoelectric transmission measurement.
Another method is to test the ECG signal. The sensor of the bracelet can judge the user's heart rate by measuring the electrical signal of myocardial contraction. The principle is similar to electrocardiogram. The disadvantage is that the circuit is complex, takes up a lot of PCB space and is vulnerable to electromagnetic interference. At the same time, the sensor must be close to the skin and placed in a relatively fixed position, so it is difficult for a bracelet to adopt this measurement method.
In addition, there is vibration measurement, and the product has only recently been produced. Because every heartbeat will cause the vibration of the body, this vibration can be captured by high-precision sensors, and then the heartbeat can be obtained through signal processing. Generally speaking, products such as smart cushions or smart massagers will adopt this measurement method, and there are relatively few bracelets.
The accuracy of heart rate has little to do with bracelet or watch, but with measurement principle and algorithm.
At present, there are two mainstream heart rate measurement methods. One is photoelectric transmission measurement, that is, there is a green light flashing from time to time on the back shell of the watch bracelet. Pulse is measured by the absorbance of hemoglobin in blood vessels and converted into heart rate by algorithm. At present, most watch bracelets are like this;
The other is the measurement of cardiac current, which requires an external heart rate band. Cardiac current is sensed by two electrodes and converted into heart rate by algorithm. This is used by professional motion measuring equipment with high accuracy.
If it is not a professional sport, an ordinary watch bracelet will do, and a professional sport is still a heart rate band.
Another influencing factor is the algorithm. Generally, some smart wear brands such as GARMIN, Songtuo and Huawei are all good, with large shipments and accurate data.
1, smart watches and smart bracelets belong to the same category of products, both of which belong to smart wearable devices. 2. The difference between a smart watch and a smart bracelet can be seen from the name. The size of the smart watch will be relatively larger than the smart bracelet, and of course the functions will be more complete. Many smart watches have GPS modules, which can answer calls, play music, navigate, send and receive information and other functions, while the functions of bracelets are much simpler, mainly reflected in the aspects of step counting, sleep monitoring, communication reminder, high battery life and so on. For the purpose of your main exercise and fitness, you can consider buying a sports smart bracelet. First of all, the function is enough to meet the demand and is lighter. high price–performance ratio
As a person who has bought three sports bracelets, let me talk about buying rings.
Regarding the accuracy of heart rate measurement, which the subject is very concerned about, there is no problem with the three bracelets I have used, even if there are not many errors. For example, after I climbed the stairs, my heart rate obviously increased to 85 beats/minute, while my heart rate was generally lower than 70 beats. When sleeping, the heart rate obviously slows down, about 65 times.
I once measured my heartbeat according to my pulse, which was similar to the speed measured by a bracelet. In this regard, I believe that most bracelets on the market meet the requirements.
If the main demand of the subject is to measure the heart rate, brand bracelets and sports watches on the market can be bought at will, such as Huawei, Huami and Xiaomi.
However, the subject did not mention the specific requirements for the price, so I will nominate several bracelets/watches with good cost performance on the market! Prices range from high to low, please indicate your choice.
1, designed by Porsche Huawei GT2
Fashionable appearance, complete functions, with GPS, running can also record the path without a mobile phone. Suitable for successful people and local tyrants who are not bad at money, please feel free to buy.
Huawei Watch GT 2 Porsche Design Huawei Watch Sports Smart Hand
4688.00
2. Apple Watch Series 6 GPS model
Apple watch, suitable for users of fruit powder and Apple family barrels, looks more like a sports watch and looks younger and more energetic. The disadvantage is that the battery life is average.
Apple Watch Series 6 Smart Watch GPS 44mm dark gray
3399.00
Of course, Apple has a cheaper one. Apple Watch SegGPS, like Apple devices, and the budget is insufficient. You can choose this one.
Apple Watch SE smart watch GPS 44mm deep space gray aluminum metal
2399.00
3. Huawei GT2 ordinary models
The function is not much different from the above one. There should be everything, but the price is much more affordable, and the appearance is also very fashionable and has a sense of design. Suitable for young people with good income and relatively affordable.
Huawei watch GT2 Huawei watch sports smart watch two weeks battery life/
1488.00
4. Glory Watch 2
I looked at the new watch on the counter. There are two sizes 46 and 42 to choose from, which are suitable for both boys and girls. The appearance is simple and steady, the function is complete, the price is not expensive, and it is suitable for programmers to wear.
Glory Watch 2 MagicWatch2 Sports Smart Bracelet 6 Bluetooth Call for Men and Women
1099.00
5. Xiaomi Color Sports Edition
The price is cheap and the appearance is good. However, it is said that the firmware update is slow and the battery life is average. It is called a big bracelet. I have seen the real machine in Xiaomi House, and its appearance is really beautiful, suitable for girls.
Xiaomi Watch Color Sports Edition Elegant Black Blood Oxygen Detection Multifunctional NFC Super
699.00
6. Glory Watch ES and Glory Bracelet 6
Glory Watch ES 10 Day Life Intelligent HD Big Screen Fast Charge 50m Waterproof Sportsman
549.00
Glory bracelet 6 NFC version Meteorite Black 1.47 inch 14 days battery life 10 kinds of sports.
289.00
I put them together because their functions are similar, but their appearance is different. The former is bigger, more expensive and more versatile.
I bought bracelet 6 myself. Please give me another answer for detailed evaluation. In that answer, I wrote in detail why I chose this bracelet and how I felt about using it.
There are many ways to save migrant workers, and one of the most effective ways is not to spend money indiscriminately. Just choose the watch/bracelet that suits you according to your wallet.
I also have a smart watch, a bracelet and a special heart rate band. When I measured them at the same time, I found that there was not much difference between them. If you buy, you can buy a big brand, which is guaranteed.