Health detection and motion detection are the core functions in smart wearable devices. Many of Huawei's smart watches or smart bracelets can support continuous measurement of heart rate. Where is Huawei Health Continuous Heart Rate Switch?
Huawei Health, where is the continuous heart rate switch?
1. Open Huawei Health APP, enter the watch details page, and click Health Monitoring.
2, click on the continuous measurement of heart rate, open the continuous measurement of heart rate switch on the right.
This paper takes Huawei WATCHGT2e Huawei p40 as an example, which is applicable to the HarmonyOS2.0 system Huawei Health V 1 1.0.5 version.
The principle is as follows:
Using light to transmit or reflect blood (pulse) flowing in blood vessels to detect pulse rate, which is usually equal to heart rate. At present, most bracelets use this principle to detect heart rate, also known as photoelectric method.
At present, most of the heart rate monitoring methods of smart bracelets are photoelectric, and its obvious feature is that the sensor part is equipped with green LED lights.
Simply put, the method of measuring heart rate is based on the principle of light absorption by substances, and the blood vessels are irradiated with the green LED lamp of smart wearable devices with photosensitive photodiodes for a period of time. Because blood is red, it can reflect red light and absorb green light. When the heart beats, the blood flow increases and the absorption of green light increases. When the heart is in the interval of beating, the blood flow will decrease and the absorbed green light will also decrease.
Therefore, the heart rate can be measured according to the absorbance of blood.
What does the smart bracelet rely on to measure heart rate?
The method of testing heart rate with smart bracelet is as follows:
A, photoelectric transmission measurement method
This method mainly uses the principle of blood light transmission. Under normal circumstances, the beating of the human heart will actually make the blood light transmittance have a certain defense. The information generated by this change will become an electrical signal under the action of the smart bracelet, and then the heart rate information can be reflected by the electrical signal. By adding a photosensitive receiver to the bracelet, the change of heartbeat can be better monitored.
Moreover, under certain conditions, the blood circulation remains relatively constant, but when the heartbeat is accelerated and the blood circulation in the body is accelerated, then the photosensitive receiver on the smart bracelet can receive more light energy. When the light intensity perceived by the smart bracelet is large, it means that the heartbeat is accelerated, so specific data can be displayed.
Second, ECG signal detection method
In fact, this detection method is the same principle as the ECG detection in the hospital. When people's mood fluctuates and their heart beats faster, the atria and ventricles actually become more excited, so the activity of myocardial cells will also accelerate. Then the smart bracelet can detect the ECG signal by detecting the activity of myocardial cells, because the irregular movement of myocardial cells can change the potential, and this ECG signal is the detected heart rate data.
In fact, it is also a healthy way to detect heart rate with smart bracelets. After all, if there is no data showing your heartbeat, your feelings are still not accurate. Sometimes I feel my heart beating fast, but the displayed data are within the normal range. But sometimes I feel my heartbeat is normal, but the ECG data is abnormal.
Wearing a smart bracelet with you can monitor your heart health 24 hours a day, not only your heart condition, but also your sleep quality. It is a very practical product.