Features of digital pressure sensor MS5540C

Generally, the impact of weather changes on people is not only a matter of not bringing umbrellas or adding or removing clothes. More often, the weather changes suddenly, just like the change in atmospheric pressure. Whether the pressure increases or decreases has a great impact on the human body. Impact. Let's briefly talk about the concept of atmospheric pressure:

The earth is surrounded by thick air, which is called the atmosphere. Air can flow freely like water, and it is also affected by gravity. Therefore, there is pressure in the air in all directions. This pressure is called atmospheric pressure.

After 5 to 6 hours in a high-pressure environment, the human body's tissues are gradually saturated with nitrogen; if it returns to the standard atmospheric pressure environment from the high-pressure environment soon, excess nitrogen will remain in the human body, and small bubbles formed by expansion will Blocks blood flow and causes air emboli to cause illness. The effect of low air pressure on the human body is to affect the oxygen supply in the human body. When the air pressure decreases, the air becomes thinner, and the partial pressure of oxygen in the air will decrease, which will cause the body's hemoglobin to not be saturated with oxygen, resulting in hypoxia, shortness of breath, and rapid heart rate.

Atmospheric pressure is an important parameter in environmental measurement. Its traditional measurement methods are mainly mercury barometers and mechanical vibrating cylinder-type empty box barometers. Although the mercury barometer has high measurement accuracy, its volume is large and it is not convenient for the miniaturization of the equipment. Although the mechanical vibrating cylinder type empty box barometer is small in size, it has a complicated structure and low measurement accuracy. Mining.com has learned that the MS5540C atmospheric pressure chip is an absolute pressure sensor that uses MEMS technology award sensor elements and signal processing circuits integrated in one. It has the advantages of small size, high accuracy, and low power consumption.

MS5540C is a digital pressure sensor. When communicating with a single-chip microcomputer, it must send corresponding instructions to read the corresponding pressure and thermometer calibration parameter values in the sensor according to the MS5540C communication protocol. In addition, each time the single-chip microcomputer operates on the data inside the MS5540C, it must be initialized first.

Tag: MS5540C

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