Application of air pressure sensor

I believe everyone is familiar with pressure sensors, but not everyone knows about air pressure sensors. In fact, many products around us will be used. The smart phones that everyone is familiar with have air pressure sensors. I believe that more than 90% of people have this function. Do not know at all.

First, let me briefly explain the basic principle of the air pressure sensor.The air pressure sensor is actually a Wheatstone bridge, diffused on a single crystal silicon wafer, used to detect small changes in resistance value. The voltage resistance effect is that the resistance value of the bridge wall changes, resulting in a differential voltage signal.

If you want to know what applications the air pressure sensor has, you must first classify the air pressure sensor.Because the existing applications of air pressure sensors are mainly divided into absolute pressure sensors, gauge pressure sensors, and differential pressure sensors; these types are divided into analog sensors and digital sensors!

After the classification is done, it is the application of the sensor. In fact, the application is a very relevant product around everyone. Everyone usually only pays attention to the application function of the product. The merchant will not tell you what technology is used to achieve practicality. , it seems that the price is not so high. . . .

Let's talk about the applications of the air pressure sensor, and what type of air pressure sensor is used. The selection of the sensor is determined by the function.

Absolute pressure sensor

Smartphones are equipped with air pressure sensors in current mid-to-high-end mobile devices.Detects our altitude by sensing changes in atmospheric pressure.In addition, if you play outdoors, you must know that the air pressure sensor can use the decrease and increase of air pressure to determine short-term weather changes, which is offline.The weather detection points are also collected with air pressure sensors, otherwise why is the current weather forecast so accurate, because everyone is a walking base station.

Outdoor sports watch, using the barometric pressure sensor to test the altitude.

The diving watch (waterproof type) is also realized by using the air pressure sensor, which needs to increase the waterproof, so that the air pressure sensor can detect the water pressure

According to the fishing meter, atmospheric pressure has a significant impact on the activity of fish. In the case of high pressure, the dissolved oxygen in the water is high, the activity of the fish is high, and the appetite is better; on the contrary, the activity of the fish is low, and the appetite is poor. Learn about changes in air pressure to improve your chances of fishing success.

The digital air pump, which was also explained in my previous article, uses the air pressure sensor to represent the previous pointer watch, and realizes the self-stop function of the inflation standard, making the inflation more intelligent. Such as inflatable kayaks and inflatable surfboards, including the application of inflatable tents.

The smart electric kettle uses the air pressure sensor to detect the altitude, which perfectly solves the problem of substandard temperature in high and low altitude areas.