Patent ID: 7219560

Claim:
A method of correcting for overspin in a turbine meter, the turbine meter having one or more turbine rotors positioned in a pipe having a liquid passing therethrough, the one or more turbine rotors rotating in response to movement of the liquid passing through the pipe, the turbine meter having one or more sensors mounted proximate to and corresponding to each of the one or more turbine rotors, each of the one or more sensors providing an electronic pulse when the corresponding one or more turbine rotors passes thereby, each pulse representing a distinct volume of liquid which passes between the one or more turbine rotors, the method comprising the steps of: providing a microprocessor capable of detecting a rapid change of the frequency of the electronic pulses from the one or more sensors, the microprocessor calculating the frequency of the electronic pulses and thereby the total quantity of liquid passing therethrough; detecting a rapid decrease in the frequency of the electronic pulses from the one or more sensors; storing the frequencies of the rapidly decreasing electronic pulses in the microprocessor; determining whether a lower frequency steady state flow rate is reached and, if so, calculating from the stored frequencies the quantity of liquid to the total quantity of liquid passing therethrough; and, if not, deleting the stored frequencies from the microprocessor.