Pressure signal processing device

Abstract

PURPOSE:To eliminate effectively only a pressure vibration component based on an air pole vibration contained in a pressure detecting signal, by generating a signal delayed by a half time of a vibration period of a detecting pressure signal, and executing an addition processing, etc. CONSTITUTION:A detecting pressure signal is delayed by a half time of an air pole vibration period by a tau time delay element 100. Also, a correction detecting output signal multiplied by a prescribed coefficient by an adder, and a correction delay signal multiplied by a prescribed coefficient passing through the element 100 are brought to a difference processing, also processed by a gain coefficient device 200, and a pressure vibration component based on an air pole vibration is extracted. This pressure vibration component is brought to a difference processing with a pressure detecting signal passing through the adder, and only the pressure vibration component based on the air pole vibration contained in the pressure detecting signal is eliminated effectively.

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