The Structural Composition and Working Principle of the Diffused Silicon Pressure Core

The diffused silicon core is the core component for manufacturing pressure sensors and pressure transmitters. It consists of compensation plates, steel balls, bases, O-rings, chips, ceramic pads, diaphragms, pressure rings, silicone oil, etc. It is widely used in process control in petroleum, chemical industry, metallurgy, electric power, aviation, medical equipment, automobile, HVAC and other industries.

Taking ZHYQ Instrument’s diffused silicon pressure core as an example, let’s talk about the internal structure of the diffused silicon pressure core.

As shown in the figure, each part has a corresponding function and characteristics:

Compensation board: signal amplification
Steel ball: sealing oil
Base: carrier of pressure sensor
O-ring: seal
Chip: Feel the pressure
Ceramic Pad: Filled
Diaphragm: Contact with the measured liquid or gas
Pressure ring: weld the diaphragm to the base
Silicone oil: conducts pressure

The pressure of the measured medium in the diffused silicon core acts directly on the diaphragm of the sensor, causing the diaphragm to produce micro-displacements proportional to the medium pressure, causing the resistance value of the sensor to change, and electronic circuits are used to detect this change and convert it A standard measurement signal corresponding to this pressure is output.

The diffused silicon circuit boards all use new amplification circuits and imported chip components. They have higher accuracy and stability than other similar products. They are special transmission circuits for various bridge sensors and are suitable for diffused silicon and ceramic pressure groups. , strain gauges and other pressure sensors. It can be combined with a special pressure transmitter housing to form an integrated pressure transmitter, or it can be installed and used separately.