1. Piezoresistive force sensor resistance strain gauge is one of the main components of piezoresistive strain sensor. The working principle of the metal resistance strain gauge is the phenomenon that the resistance value of the strain resistance changes with the mechanical deformation, which is commonly known as the resistance strain effect.
2. Ceramic pressure sensor: The ceramic pressure sensor is based on the piezoresistive effect. The pressure directly acts on the front surface of the ceramic diaphragm, causing a slight deformation of the diaphragm. The thick film resistor is printed on the back of the ceramic diaphragm and connected to form a Wheatstone. Bridge, due to the piezoresistive effect of the varistor, the bridge generates a highly linear voltage signal proportional to the pressure and proportional to the excitation voltage. The standard signal is calibrated to 2.0/3.0/3.3mV according to the pressure range. /V, etc., compatible with strain gauge sensors.
3. Diffused silicon pressure sensor: The working principle of the diffused silicon pressure sensor is also based on the piezoresistive effect. Using the principle of piezoresistive effect, the pressure of the measured medium directly acts on the diaphragm (stainless steel or ceramic) of the sensor, so that the diaphragm is generated and the medium The micro-displacement proportional to the pressure changes the resistance of the sensor. The electronic circuit detects this change and converts and outputs a standard measurement signal corresponding to the pressure.
4. Sapphire pressure sensor: Using strain resistance type working principle, using silicon-sapphire as semiconductor sensitive element, it has unparalleled measurement characteristics. Therefore, semiconductor sensitive components made of silicon-sapphire are not sensitive to temperature changes and have good working characteristics even under high temperature conditions; sapphire has extremely strong radiation resistance characteristics; in addition, silicon-sapphire semiconductor sensitive components are not sensitive to temperature changes. pn drift.
5. Piezoelectric pressure sensor: The piezoelectric effect is the main working principle of the piezoelectric sensor. The piezoelectric sensor cannot be used for static measurement, because the charge after the action of external force can only be saved when the circuit has an infinite input impedance . The actual situation is not like this, so this determines that the piezoelectric sensor can only measure dynamic stress.
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