Application of high-voltage amplifier based on non-destructive testing of fragrant pear hardness
2022-03-22
According to the acoustic vibration test, a force hammer is usually used to excite the fruit samples. In order to reduce the signal interference and obtain a strong excitation response signal, a high-voltage amplifier is used to linearly amplify the Ve signal. Considering that the rated voltage that the sensor can withstand in continuous operation is 90V, the voltage signal is linearly amplified into an excitation signal VE with a pulse peak voltage of 80V, and then the sample is vibrated by the piezoelectric beam sensor at the excitation end.
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