The pedometer is a healthy electronic product. As the name implies, how many steps can you calculate when you walk? Foreign experts generally recommend that taking 10,000 steps a day is the best for health, so we often see some slogans "10000 steps a day". The pedometer can help you accomplish this goal, helping you to take a look at the day and take a few steps. If you have more, you can take a few steps tomorrow. If you are less, you will take a few more steps tomorrow. This is very helpful for your health, but it can also help you lose weight, it is very simple, walking can consume calories. Nowadays, people pay more and more attention to health. If the pedometer will go to the family of ordinary people, the pedometer will have an infinite market prospect. The pedometer generally uses an accelerometer to feel the vibration of the outside world. Its working principle is that a small piece of magnet is sealed in a section of plastic tube, and the coil is wound around the tube. When the plastic tube moves, the magnet moves backward in the tube due to inertia, cutting the coil, and the coil is generated due to electromagnetic induction. When the current is moving, the acceleration of the ups and downs is approximately sin…

The product is stable and reliable, and the product has anti-destruction, anti-lightning surge, anti-interference and other performance; more functions are added, which is convenient for installation, debugging and use, such as adjustable frequency of detector, set detection area, anti-blocking, anti-proof Destruction, wireless connection between detector and host; more convenient installation and debugging, wireless connection between detector and host, simplify installation and construction workload, adapt to various household users' needs; in the future, this anti-theft sensor will be staffed One, China has a sales potential of 1.3 billion. The anti-theft sensor mainly has the functions of anti-vandal, automatic alarm, and loud sound warning; it is to automatically induct the intrusion behavior occurring in the arming sensor area by using physical or electronic technology, generate an alarm signal, and prompt the on-duty personnel to generate an alarm. The area of the area shows the system that may take countermeasures. The anti-theft sensor device is generally divided into a front-end sensor and an alarm controller. The alarm controller is a host (such as a computer host) for controlling the processing including wired/wi…

Fingerprint identification was mainly applied in the access control system and attendance system earlier. The main service target is the community or enterprise unit. The popularity has increased greatly, not only in the transfer to individual users, but also in many different fields. It is not difficult to see that fingerprint recognition technology no longer has a high impression, but gradually enters the grassroots and truly serves ordinary people. Whether you are walking into a residential area, or entering a school, or handling identity documents or even paying for a purchase, fingerprint identification products can be seen everywhere. The fingerprint attendance machine is mainly composed of a sensor, a casing, a main board, a power source, a fingerprint device, a display, a keypad, a power cord and the like. The working principle is that the fingerprint automatic identification system collects, analyzes and compares the living fingerprints through special photoelectric conversion equipment and computer image processing technology, and can automatically, quickly and accurately identify the personal identity. The system generally includes processes such as fingerprint image acquisition, fingerprint image processing, feature e…

Car air purifiers are also called car purifiers or car air purifiers; they are mainly divided into four types, namely, filter type, electrostatic dust collection type, ozone, and net ion group. The vehicle air purifier is usually composed of a high voltage generating circuit negative ion generator, a micro fan, an air filter and the like. Its working principle is as follows: the micro-fan (also called ventilator) in the machine circulates the air inside the car. The polluted air passes through the PM2.5 filter and the activated carbon filter in the machine to filter or adsorb various pollutants. After passing through the negative ion generator installed in the air outlet (the high voltage in the negative ion generator generates DC negative high voltage), the air is continuously ionized, and a large amount of negative ions are generated, which are sent out by the micro fan to form a negative ion airflow, so as to clean and purify the air.…

The working principle of the blood pressure meter is different according to the principle of the Korotkoff sound method and the oscillation method. The Korotkoff sound method measures the blood pressure by listening to the sound emitted by the blood flowing through the blood vessels; the "oscillating method" causes the blood vessels in the arm band to vibrate due to the action of the blood flow from the heart. The oscillation method is a method of detecting the blood pressure value of the waveform of such vibration. Not affected by outside noise. Electronic sphygmomanometers are mainly used in hospitals abroad. Because the stethoscope is not used, the arm strap is easy to operate and can be used by anyone.The classification of blood pressure meter can be distinguished according to the measurement method and working principle: according to the different measurement methods, the blood pressure meter can be divided into two types: wrist blood pressure meter and arm blood pressure meter; according to different working principles, it can be divided into three. Species: traditional mercury column (mercury) sphygmomanometer, barometer (spring) sphygmomanometer, electronic sphygmomanometer. The blood pressure meter has functions…