Static pressure vs. dynamic pressure
1. Dynamic pressure can be simply understood as the pressure that occurs after fluid flows in the pipeline. For example, when everyone is cooking, the pressure in the pipeline decreases and the fluid flows. The pressure in the pipeline at this time can be recorded as dynamic pressure.
2. Static pressure is the pressure when the fluid in the pipeline is not flowing. If there are no users using gas late at night, when you measure the pressure of the stationary fluid in the pipeline, it is the static pressure.
The difference between dynamic pressure sensor and static pressure sensor
Diaphragm pressure sensors are based on the structure of the sensor. According to the sensing principle, diaphragm pressure sensors can be divided into different types such as piezoresistive, strain gauge, inductive, capacitive, and piezoelectric.
Among the pressure sensors with different principles mentioned above, the piezoelectric pressure sensor is only suitable for measuring dynamic pressure, so dynamic calibration is required.
Other dynamic and static pressures can be measured. The most widely used ones are quasi-static measurements with very low frequency. Therefore, static calibration is the most commonly used calibration form. When the measured pressure frequency band is wide, various pressure sensors should be calibrated for frequency response.
Applications of dynamic pressure sensors and static pressure sensors
1. Dynamic pressure sensor
Dynamic pressure sensors are mainly used in the measurement of acceleration, pressure and force. Piezoelectric acceleration sensor is a commonly used accelerometer. It has excellent characteristics such as simple structure, small size, light weight, and long service life.
Piezoelectric acceleration sensors have been widely used in vibration and shock measurements of aircraft, automobiles, ships, bridges and buildings, especially in the aviation and aerospace fields.
Piezoelectric sensors can also be used to measure the combustion pressure and vacuum inside the engine, and can also be used in the military industry. For example, they can be used to measure the changes in chamber pressure and gun pressure at the moment when a gun bullet is fired in the chamber. shock wave pressure at the mouth. It can be used to measure both large pressure and small pressure.
2. Static pressure sensor
Static pressure sensors are often used to measure static air pressure. For example, the static pressure on air filters and cooling coils, the input and discharge pressure of blowers, etc.
In ventilation systems, static pressure refers to the pressure of the air inside a building relative to the outside air when the exhaust fan is turned on. Measuring and maintaining the proper negative pressure allows ventilation systems to mix outside air with inside air more efficiently.
