When there is a fire in a building, the smoke-proof stairwell, the escape corridor, and the front room that is used for firefighting are the life passages that are used for evacuation, and the corridors that are used by firefighters to fight the fire. The low residual pressure of the positive pressure air supply pressure sensor pressurized air supply system is not mass flowmeter conducive to smoke prevention from the perspective of fire and smoke exhaust; therefore, the higher the pressure, the better. However, because the evacuation door is designed to open in the direction of the evacuation route, the direction of the pressurized air supply of the pressure sensor is exactly the opposite of that of the evacuation equipment.
If the pressure is too high, the pressure difference between the two sides of the evacuation door between the fire stairwell and the fire antechamber, and between the fire antechamber and the aisle, will be too large. This will result in the door being unable to open normally, which will have an impact on the evacuation of personnel as well as the operation of firefighters. save. Before anything else, a design for the pressure sensor pressurized air supply needs to be formulated based on the principles of safe evacuation.
A fire-fighting pressure sensor is what the fire-fighting ventilation system relies on for pressure sampling the majority of the time. The pressure sensor directly converts the pressure into directly measurable electricity, amplifies the sensor signal through a signal conditioning circuit, and then collects and processes the data through a high-speed microprocessor (MCU), and outputs And the control signal, and drives the rear circuit to control the electric switch according to the set upper and lower limit pressure values, open or close the bypass valve, and finally realize pressure control. In other words, the pressure sensor is able ultra sonic level transmitter to directly convert the pressure into directly measurable electricity.
The micro-fire pressure sensor is most commonly utilized in the following applications: front room elevator front room pressure sensor; stairwell differential pressure pressure sensor; elevator front room air outlet pressure sensor; building positive pressure air supply pressure sensor; positive pressure air supply system pressure sensor; office building and Shopping malls and high-rise buildings; control the pressure sensor of the roof fan; measure and control the positive pressure air supply pressure control; elevator front room air outlet pressure sensor;It is imperative that pressure relief be carried out so that, in the event of a fire, personnel assigned to the evacuation of the building will have no trouble opening the fire door, and at the same time, smoke will not be able to enter the front room or the fire escape corridor stairwell.
The performance of the fire pressure sensor is reliable, and it has a long life in service. The majority of the time, it is utilized for measuring minute differences in pressure or the pressure of dry air. It finds widespread application in the differential pressure or pressure non contact radar level transmitter detection of various wind pressure pipelines and natural gas pipelines.
Ceramic capacitive pressure sensors' defining characteristics and distinct competitive advantages
Ceramic capacitive pressure sensors' defining characteristics and distinct competitive advantages.
Ceramic is a material that is known for its high level of elasticity, resistance to corrosion and wear, resistance to shock and vibration, and so on. Its working temperature range can reach -40 to 135 degrees Celsius thanks to the thermal stability characteristics of ceramics and the thick film resistance of the material. Additionally, it has a high precision and a high stability of measurement. The degree of electrical insulation is greater than 2 kilovolts, the strength of the output signal is high, and the service life is substantial.
Ceramic capacitive pressure sensor technology uses a structure consisting of a fixed ceramic base and a movable ceramic diaphragm. The movable diaphragm is sealed and fixed with the base through the use of glass paste. In order to create a variable capacitor, the electrode pattern is printed on the interior surface that lies between the two. The capacitance between the two components shifts in response to alterations in the medium pressure that is exerted on the diaphragm. After being converted and conditioned, the signal is then output for further use after it has been processed by the conditioning chip. The technology of ceramic capacitive pressure sensors has many benefits, including a low initial investment, a broad measurement range, favorable temperature characteristics, consistency, and long-term stability.
The control of industrial processes and automobile manufacturing are two of the most common applications for it around the world. A ceramic base, a deformable diaphragm, and a hollow sealed cavity make up the mass flow meter types core body of the ceramic capacitive pressure sensor, which is a sealed gauge pressure structure. This structure is comprised of three parts: a hollow sealed cavity, a deformable diaphragm, and a ceramic base. Diaphragm, when the pressure of the core body changes, the deformable membrane bends after bearing the pressure, which results in a change in the spacing between the substrates, which causes a change in the capacitance between the plates, and the capacitance change is converted into a standard output through the conditioning chip (such as 0–5V voltage output, 4–20mA current output, I2C, SPI digital output, etc. ). This allows the diaphragm to accurately measure.
Ceramic capacitive pressure sensors can be widely used in pressure detection of water, gas, and liquid media, and can perfectly cope with water hammer effects. Pressure cookers for variable pressure applications can benefit from ceramic capacitor flat film structures' ability to avoid clogging. Other advantages of ceramic capacitive pressure sensors include resistance to corrosion and impact, absence of hysteresis, and strong compatibility with media. Ceramic capacitors find widespread application across a variety of industries, including but not limited to those dealing with process control, environmental control, hydraulic and pneumatic equipment, servo valves and transmissions, chemicals and the chemical industry, and medical instruments.