Pressure sensor (positive pressure air supply outlet)

The pressure sensor (positive pressure air outlet) is a sensor used to measure and monitor the pressure changes at the air outlet in the positive pressure air supply system. The following is a detailed analysis of the pressure sensor (positive pressure air outlet):

1. Definition and function

Definition: The pressure sensor (positive pressure air outlet) is a sensor that can measure and display the pressure value at the air outlet in the positive pressure air supply system in real time.

Function:

Real-time monitoring: It can monitor the pressure changes at the air outlet in the positive pressure air supply system in real time.

Data transmission: The detected pressure value is converted into an electrical signal or other form of signal, and transmitted to the control system or monitoring equipment by wired or wireless means.

Alarm and linkage: When the pressure value exceeds the preset range, an alarm signal can be issued, and linkage control can be performed with other equipment (such as fans, valves, etc.) to maintain the stability and safety of the system pressure.

2. Working principle

The working principle of the pressure sensor (positive pressure air outlet) is usually based on some physical effect, such as piezoresistance effect, piezoelectric effect or capacitance effect. When the airflow in the positive pressure air supply system exerts pressure on the sensor, the sensitive elements inside the sensor will undergo corresponding physical changes (such as changes in resistance value, charge value or capacitance value), and these changes are converted into measurable electrical signal outputs through the circuit. After receiving these signals, the control system or monitoring equipment can perform corresponding processing and analysis to achieve monitoring and control of the positive pressure air supply system.

3. Types and characteristics

Pressure sensors (positive pressure air supply ports) can be divided into many types according to their working principles and performance characteristics, such as semiconductor piezoelectric impedance diffusion pressure sensors, electrostatic capacitance type pressure sensors, etc. These sensors have their own characteristics and application scenarios:

Semiconductor piezoelectric impedance diffusion pressure sensor: By forming semiconductor deformation pressure on the surface of the thin sheet, a piezoelectric impedance effect is generated when the external force (pressure) deforms the thin sheet, thereby converting the impedance change into an electrical signal. This sensor has high sensitivity and accuracy and is suitable for occasions where pressure changes are accurately measured.

Electrostatic capacitance type pressure sensor: The fixed pole of glass and the movable pole of silicon are opposite to form a capacitor. When the external force (pressure) deforms the movable pole, a change in electrostatic capacitance is generated, which is then converted into an electrical signal. This sensor has the advantages of simple structure and fast response speed, and is suitable for occasions where dynamic pressure changes are measured.

IV. Application scenarios

Pressure sensors (positive pressure air outlets) are widely used in various occasions where pressure changes need to be monitored and controlled, especially in positive pressure air supply systems. For example, in the ventilation system of fire-fighting buildings, pressure sensors can monitor the pressure values in stairwells, antechambers and other areas in real time to ensure that sufficient positive pressure can be maintained in emergency situations such as fires to prevent smoke from spreading; in air purification systems, pressure sensors can monitor the pressure changes of air outlets to adjust the operating status of the fan to keep the indoor air fresh and comfortable.

V. Maintenance and care

In order to maintain the accuracy and stability of the pressure sensor (positive pressure air outlet), regular maintenance and care are required. Specifically include:

Cleaning and dust prevention: Regularly clean the dust and dirt on the surface and surrounding of the sensor to prevent it from affecting the measurement accuracy of the sensor.

Calibration and adjustment: Regularly calibrate and adjust the sensor to ensure the accuracy and consistency of its measurement results.

Inspection and replacement: Regularly check whether the sensor's connection lines, interfaces, seals and other components are intact and replace damaged components in time.

The above measures can extend the service life of the sensor and ensure its long-term stable operation.