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AssigneeDaikin Industries, Ltd.
InventorsHyunsik Kim, Takashi Kanemura, Tetsuhiro Kodani, Kwan-Young Han
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The present invention relates to a pressure signal detection circuit and a pressure signal detection method in which a pyroelectric signal from a piezoelectric film is suppressed. More specifically, the pressure signal detection circuit receives input of an input signal from a piezoelectric film, differentiates the input signal for signal component analysis of the input signal, outputs the signal analysis value of the input signal based on the differential value, removes offset of the input signal by using the signal component analysis value, integrates the input signal, and outputs a pressure input signal value from which a heat input signal value is removed.
A pressure signal detection circuit in which a pyroelectric signal obtained from a piezoelectric material is suppressed, the pressure signal detection circuit comprising an offset removal circuit for subtracting a heat input signal from an input signal from the piezoelectric material using a difference in input speed between a pressure input signal and a heat input signal.
A pressure signal detection method in which a pyroelectric signal obtained from a piezoelectric material is suppressed, the pressure signal detection method comprising an offset removal circuit for subtracting a heat input signal from an input signal from the piezoelectric material using a difference in input speed between a pressure input signal and a heat input signal.
Dependencies are inferred from the claim text.