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US 6,439,030 B2Granted
Signal processing device for piezoelectric sensor
AssigneeDenso Corporation
InventorsToshiyuki Suzuki, Eiichi Kurokawa, Hiroyuki Murai
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AssigneeDenso Corporation
InventorsToshiyuki Suzuki, Eiichi Kurokawa, Hiroyuki Murai
Estimating the term…
A signal processing device is provided which is designed to process an output of a piezoelectric sensor to produce a signal which indicates a load applied to the piezoelectric sensor accurately without being affected adversely by leakage current occurring in the piezoelectric sensor and electrical disturbances. The signal processing device includes a differentiating circuit which differentiates the output of the piezoelectric sensor and an integrating circuit which integrates an output of the differentiating circuit to produce an output signal as a function of the output of the piezoelectric sensor. The frequency range of the output signal is selected based on a frequency range of the load applied to the piezoelectric sensor.
A signal processing device for processing an output of a piezoelectric sensor to produce a signal indicative of a load applied to the piezoelectric sensor, said device comprising:
A signal processing circuit for processing the output of a piezoelectric sensor to produce a signal indicative of a load applied to the piezoelectric sensor, said circuit comprising:
A method for measuring a variable frequency cyclic mechanical load associated with an internal combustion engine, said method comprising:
Dependencies are inferred from the claim text.