Principle and application of pressure sensors
abstract：There are various types of mechanical sensors, such as resistance strain gauge pressure sensors, semiconductor strain gauge pressure sensors, piezoresistive pressure sensors, and inductive pressure sensors
Type
There are various types of mechanical sensors, such as resistance strain gauge pressure sensors, semiconductor strain gauge pressure sensors, piezoresistive pressure sensors, inductive pressure sensors, capacitive pressure sensors, resonant pressure sensors, and capacitive acceleration sensors. But the most widely used is the piezoresistive pressure sensor, which has extremely low price, high accuracy, and good linear characteristics.
Know
When it comes to decompression resistance pressure sensors, let's first understand the element of resistance strain gauges. A resistance strain gauge is a sensitive device that converts the strain changes on the tested piece into an electrical signal. It is one of the main components of a piezoresistive strain sensor. Metal resistance strain gauges and semiconductor strain gauges are two commonly used types of resistance strain gauges. There are two types of metal resistance strain gauges: wire shaped strain gauges and metal foil shaped strain gauges. Usually, strain gauges are tightly bonded to a mechanically strained substrate through a special adhesive. When the substrate undergoes stress changes, the resistance strain gauge also undergoes deformation, causing a change in the resistance value of the strain gauge and a change in the voltage applied to the resistance. This type of strain gauge usually produces a small change in resistance when subjected to force. Generally, this type of strain gauge forms a strain bridge, which is amplified by subsequent instrument amplifiers and then transmitted to processing circuits (usually A/D converters and CPUs) for display or execution.
There are various types of mechanical sensors, such as resistance strain gauge pressure sensors, semiconductor strain gauge pressure sensors, piezoresistive pressure sensors, inductive pressure sensors, capacitive pressure sensors, resonant pressure sensors, and capacitive acceleration sensors. But the most widely used is the piezoresistive pressure sensor, which has extremely low price, high accuracy, and good linear characteristics.
Know
When it comes to decompression resistance pressure sensors, let's first understand the element of resistance strain gauges. A resistance strain gauge is a sensitive device that converts the strain changes on the tested piece into an electrical signal. It is one of the main components of a piezoresistive strain sensor. Metal resistance strain gauges and semiconductor strain gauges are two commonly used types of resistance strain gauges. There are two types of metal resistance strain gauges: wire shaped strain gauges and metal foil shaped strain gauges. Usually, strain gauges are tightly bonded to a mechanically strained substrate through a special adhesive. When the substrate undergoes stress changes, the resistance strain gauge also undergoes deformation, causing a change in the resistance value of the strain gauge and a change in the voltage applied to the resistance. This type of strain gauge usually produces a small change in resistance when subjected to force. Generally, this type of strain gauge forms a strain bridge, which is amplified by subsequent instrument amplifiers and then transmitted to processing circuits (usually A/D converters and CPUs) for display or execution.
