Pressure detection signal processing device, engine control system, and non-transitory computer readable medium storing a program

A pressure detection signal processing device that performs signal processing on an output signal of a pressure sensor comprising a piezoelectric element generating charge according to received pressure, the pressure detection signal processing device comprising:

• a current-voltage conversion part which converts a current signal corresponding to the charge into a voltage signal;
• an extraction part which extracts a component in a specific frequency band of the voltage signal;
• and
• a digital signal processing part which performs correction processing for removing a drift of the piezoelectric element through digital signal processing on the basis of the voltage signal and an extracted signal which has been extracted,
• wherein the digital signal processing part comprises
• a subtraction processing part which obtains a subtraction signal indicating a result of a subtraction calculation with respect to the voltage signal and the extracted signal, and
• an integration processing part which performs integration processing on the subtraction signal.

A non-transitory computer readable medium storing a program for causing a computer to execute following functions:

• for causing a pressure detection signal device that performs signal processing on an output signal of a pressure sensor comprising a piezoelectric element generating charge according to received pressure to realize:
• a signal processing function of performing correction processing for removing a drift of the piezoelectric element on a voltage signal converted from a current signal corresponding to the charge by a current-voltage conversion part,
• wherein the signal processing function comprises
• a differentiation processing function of performing differentiation processing on the voltage signal,
• a first integration function of performing integration processing on the signal having been subjected to the differentiation processing, and
• a second integration function of performing integration processing on the signal having been subjected to the integration processing.

A non-transitory computer readable medium storing a program for causing a computer to execute following functions:

• for causing a pressure detection signal device that performs signal processing on an output signal of a pressure sensor comprising a piezoelectric element generating charge according to received pressure to realize:
• a signal processing function of performing correction processing for removing a drift of the piezoelectric element on the basis of a voltage signal converted from a current signal corresponding to the charge by a current-voltage conversion part and an extracted signal obtained by extracting a specific frequency component of the voltage signal,
• wherein the signal processing function comprises
• a subtraction processing function of obtaining a subtraction signal indicating a result of a subtraction calculation with respect to the voltage signal and the extracted signal, and
• an integration function of performing integration processing on the subtraction signal.