Patent ID: 8001847

Claim:
A Coriolis mass flowmeter for vibrating a pipe line through which a fluid flows and measuring a mass flow rate of the fluid flowing through the pipe line, based on a phase difference between an upstream vibration signal and a downstream vibration signal, wherein the upstream vibration signal is detected in an upstream side of the pipe line, and the downstream vibration signal is detected in a downstream side of the pipe line, the flowmeter comprising: a flow rate signal calculator comprising: a first signal processor; and a second signal processor, wherein the upstream vibration signal is divided into at least a first upstream vibration signal that flows through a first path and a second upstream vibration signal that flows through a second path, wherein the downstream vibration signal is divided into at least a first downstream vibration signal that flows through the second path and a second downstream vibration signal that flows through the first path, wherein the first signal processor is provided on the first path to calculate a first flow rate signal that represents a phase difference between the first upstream vibration signal and the second downstream vibration signal, and then correct the calculated first flow rate signal, and wherein the second signal processor is provided on the second path to calculate a second flow rate signal that represents a phase difference between the second upstream vibration signal and the first downstream vibration signal, and then correct the calculated second flow rate signal.