Pressure sensor with long service life and high sensitivity

Abstract

The invention discloses a pressure sensor with long service life and high sensitivity. The pressure sensor comprises a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R7, a transistor T1, a transistor T2, a diode D1, a diode D2 and a capacitor C, wherein the resistor R1, the resistor R2, the resistor R4 and the resistor R3 are sequentially connected to one another in series to form a closed loop; a common terminal of the resistor R2 and a common terminal of the resistor R3 are sequentially connected with an emitting electrode of the resistor R7, an emitting electrode of the diode D2 and an emitting electrode of the transistor T1; a base electrode of the transistor T1 is connected with a common terminal of the resistor R3 and a common terminal of the resistor R4; a collector electrode of the transistor T1 is sequentially connected with the resistor R5 and a power source VCC; an emitting electrode of the transistor T1 is connected with an emitting electrode of the transistor T2; a base electrode of the transistor T2 is sequentially connected with a common terminal of the capacitor C, a common terminal of the resistor R1 and a common terminal of the resistor R2 in series; a collector electrode of the transistor R2 is sequentially connected with the resistor R6 and the power source VCC in series; and a negative electrode of the diode D1 is connected with a common terminal of the resistor R1 and a common terminal of the resistor R3. By using the principle, the pressure sensor is simple in structure, high in sensitivity, high in pressure resolution ratio, high in overall precision and long in service life.

Description

technical field [0001] The invention relates to the field of pressure sensing, in particular to a pressure sensor with long service life and high sensitivity. Background technique [0002] Pressure sensors are the most commonly used sensors in industrial practice. Generally, the output of ordinary pressure sensors is an analog signal, and an analog signal refers to a signal in which information parameters appear as continuous signals within a given range. Or within a continuous time interval, the characteristic quantity representing information can appear as a signal of any value at any instant. The pressure sensors we usually use are mainly manufactured using the piezoelectric effect, and such sensors are also called piezoelectric sensors. The pressure sensor is the most widely used sensor. Traditional pressure sensors are mainly mechanical structural devices, and the deformation of elastic elements is used to indicate pressure, but this structure is large in size and li...

AI Technical Summary

Problems solved by technology

However, the existing pressure sensors have poor sensitivity, complex integrated circuits, complex structures, poor pressure resolution, low comprehensive accuracy and short service life, and cannot be used in some demanding aerospace and water transportation fields.

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