What is the principle of the heart rate monitor?

The principle of the heart rate monitor is to feel the change in the heart muscle potential through a strap worn on the chest, and then transmit it wirelessly to the watch worn on the wrist, providing the change in heart rate per minute through technical effects such as amplification.

Note: Wireless sensor technology: The use of heart rate transmission belt to collect human heart waves (just like the principle of electrocardiogram test sensing in hospitals) is the most accurate method of heart rate measurement.

Send it to the heart rate meter to more effectively remind the sports monitor to control the heart rate, prevent sudden death, and at the same time achieve the best exercise effect by controlling the heart rate range.

The principle of heart rate measurement of the watch is: the principle of PPG photoplethysmography pulsography.

In simple terms, on the back of the sports bracelet there is a photoelectric receiver that emits green light. When the beam is emitted, some of it is absorbed by the musculature and blood, and the rest is reflected back to the receiver.

Blood tends to reflect red light and absorb green light, so the heart will produce different colors of reflected light during contraction and relaxation.

Monitor your heart rate

For decades, exercise physiologists have used heart rate to prescribe and monitor exercise training programs, and clinical exercise prescriptions are likewise based on changes in heart rate. During running, heart rate also reflects the intensity, nature, energy metabolism and oxygen consumption, lactate accumulation, and fatigue and recovery of the body.

Therefore, adding the heart rate monitoring function to the smart sports bracelet is not adding a selling gimmick, but allowing users to use heart rate as a measurement standard for running, so that running exercise can be scientific and achieve the best results.

Sports watches and sports bracelets have become indispensable and important wearable devices for running and other sports enthusiasts.

They play an important role in helping runners record their heart rate, run volume, evaluate exercise intensity, and reflect exercise results.

The watch is lightweight and easy to wear, making it much easier and more convenient than holding a bulky phone to record a run.

For runners who are not very demanding, cheap sports bracelets are basically enough to meet their needs, while for mature runners, sports watches that can easily cost thousands of dollars are their important equipment.

Many runners have reported that after high-intensity exercise, the heart rate of the fitness bracelet is only 80. Why is my heart rate measurement inaccurate? When people wear bracelets, the position of the photoelectric sensor and the degree of adhesion to the ** will change with the activity of the human body, which will cause the pulse rate measurement to become inaccurate.

Running watches are mainly divided into two categories in terms of measurement technology: one is ECG measurement technology and the other is photoelectric measurement technology.

ECG measurements are accurate and reliable, but some runners feel constrained by the need to use heart rate bands;

The photoelectric measurement technology does not need to use the heart rate belt at all, which greatly reduces the burden on runners and is favored by runners, and photoelectric watches seem to have a tendency to replace heart rate belt watches more and more.

However, the accuracy of the photoelectric watch at high heart rate has been questioned, that is, the measured heart rate is higher than the actual heart rate, that is, the heart rate measured by the photoelectric watch is more floating when the runner is running faster.

According to the report, wearing the sports bracelet on a paper towel, the heart rate of the tissue was measured to be 80, is the paper towel fine? Of course not. When we put a sports bracelet or sports watch on a non-living body, it can't recognize whether it's a living body or not, it just defaults to that it's your wrist and starts its own work:

Emitting a beam – collecting reflection information – algorithmic processing. Therefore, even if the toilet paper does not have a heartbeat, when the transmitter emits green light and drops it on the surface of the toilet paper, there will still be light reflection, and the final result is the result received by the receiver after the light reflection on the surface of the toilet paper.

The test results are accurate, because China's science and technology are very developed, and this is also proven by practice, and there are many sports watches that are very quality-guaranteed, so I think the test results are accurate.

The final result can be said to be particularly accurate, because I also have a sports watch in my life that can measure my heart rate, and I will also get a very reliable data.

Yes, because the people who make the watch are constantly perfecting this function, and the results of the inspection are still desirable.

The pressure of the sports watch is 30-59 normal. Below 29 is relaxed, 60-79 is medium, and 80-99 is high. Stress is an evaluation of the current stress value on behalf of the user's current life pressure through the relevant information provided by the watch through the heart rate, which is also very valuable for the user.

And the watch also has many functions, such as weather, calendar, calls, health, and so on.

The stress score is displayed on a scale of 0-100, with lower scores indicating less stress on the body. Exercise training, sleep status, nutritional intake, and lifestyle all affect the value of your stress score. If the stress score is low, the body can accept higher intensity training; If the stress score is high, appropriate rest is recommended.

When we are stressed, the watch will send out a vibrating reminder, prompting us to do a breathing exercise, allowing us to relax our minds by taking deep breaths, relieve stress, and keep ourselves in a relaxed state.

In addition to monitoring basic health functions such as stress score, heart rate, and step count throughout the day, the smartwatch has added body power, higher-level sleep data, drinking records and reminders, and even menstrual management functions for women. After quietly connecting with the mobile phone, it can also synchronously receive text messages, calls, emails, APP updates and other message reminders, and support offline payment functions, bringing users a convenient life experience.

Accurate mobile phone heart rate detection software requires certain mobile phone hardware support. Embed the sensor monitoring function into the smartphone and place the phone in different parts of the body at the same time. Users can keep their phone in their pocket or bag, and they can use it while watching** or listening to a voice conversation.

The goal of the mobile phone heart rate detection software project was to develop a method that automatically restores the pulse and breathing waveform according to the normal heartbeat and respiratory rate of the human body in the past. The accuracy of this method rivals that of FDA-approved devices for monitoring electrocardiograms (ECGs) and breathing.

Garmin unboxed, a watch with sports payment and heart rate detection, it is well worth getting.

The following four sports watches measure heart rate accurately:

1. Lexin smart bracelet can monitor heart rate 24 hours a day, and has functions such as sports intelligent recognition, timely message, sleep monitoring, etc.;

2. Xiaomi's second-generation smart bracelet is dustproof and waterproof, light and easy to carry, and has an OLED touch screen, and its heart rate function monitoring is more accurate;

3. HUAWEI B3 Smart Sports and Health Pedometer Bracelet has diverse functions, stable heart rate monitoring, solid and durable, and long battery life.

4. Polygon smart bracelet watch, simple and fashionable appearance, stable and reliable structural performance, accurate heart rate measurement, beautiful appearance.

Here's how it works:

1.The capillary vessels of the fingers are visible by shining a flash, the image is captured with the camera head, and finally the software is used.

Analyze changes in the image (mainly local light and dark changes) to determine the pulse.

2.Although it cannot be used as a precise medical device, it is generally quite accurate.

3.Possible disturbances include, but are not limited to, sudden changes in external ambient light, unconscious movement of fingers, and insufficient image brightness due to the distance between the camera fill light and the camera.

It should be the principle of vibration, there will be a pulse of arteries in the fingers and the whole body, and you can feel it yourself when you are quiet.