Small-scale resonance cylinder pressure sensor signal conditioning circuit excitated by piezoelectricity

Abstract

The invention relates to a sensor signal conditioning circuit, particularly to a small-scale resonance cylinder pressure sensor signal conditioning circuit excitated by piezoelectricity. The signal conditioning circuit disclosed by the invention solves the problem that an existing sensor signal conditioning circuit is not applicable to the small-scale resonance cylinder pressure sensor excitated by 9mm piezoelectricity. The small-scale resonance cylinder pressure sensor signal conditioning circuit excitated by piezoelectricity comprises a first operational amplifier, a second operational amplifier, a third operational amplifier, a fourth operational amplifier, a three-terminal voltage stabilizer, a power supply changeover chip, a first diode, a second diode, a third diode, a voltage stabilizing diode, a triode, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a sixth capacitor, a seventh capacitor, an eighth capacitor, a ninth capacitor, a tenth capacitor, a vibration collection signal input terminal, an excitation signal output terminal, a voltage signal output terminal, and a frequency signal output terminal. The signal conditioning circuit is suitable for the small-scale resonance cylinder pressure sensor excitated by 9mm piezoelectricity.

Description

technical field [0001] The invention relates to a signal conditioning circuit for a sensor, in particular to a signal conditioning circuit for a pressure sensor of a piezoelectric excitation small resonant cylinder. Background technique [0002] Piezoelectric excitation small resonant cylinder pressure sensor is widely used in airborne and measuring instruments, which can be divided into three types according to the structural size: 18mm piezoelectric excitation small resonant cylinder pressure sensor, 9mm piezoelectric excitation small resonant cylinder pressure sensor, 4mm piezoelectric excitation Excitation of small resonant cylinder pressure transducers. With the development of high precision and miniaturization of modern airborne and measuring instruments, the dimensions, weight and anti-vibration performance of the 18mm piezoelectric excitation small resonant cylinder pressure sensor and the 4mm piezoelectric excitation small resonant cylinder pressure sensor can no lo...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem that the existing sensor signal conditioning circuit is not suitable for 9mm piezoelectric excitation small resonant cylinder pressure sensor, the present invention provides a piezoelectric excitation small resonant cylinder pressure sensor signal conditioning circuit

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