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

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.