METHOD FOR MEASURING RESPIRATION SPEED

摘要

PURPOSE:To calculate always an exact respiration speed by detecting the inflection point of a dissolved oxygen consumption curve by a respiration speed converter, setting the range where linear approximation is possible, calculating an equation for an approximate straight line by using the data on the dissolved oxygen consumption in said range and calculating the respiration speed by the inclination of said line. CONSTITUTION:A measurement stage signal 32 enters a central processing circuit 27 and a measurement action is started in the respiration speed converter 11. The circuit 27 reads the dissolved oxygen concn. signal 30 from a DO amplifier at prescribed time intervals, converts 26 the signal to a digital signal and stores 28 the signal. The time data in the stage of reading is also stored 28. Such process is repeated until the measurement stage ends and the data on the dissolved oxygen consumption curve is stored 28. The circuit 27 determines the range where the data can be linearly approximated from the stored data upon ending of the measurement circuit and determines the equation for the approximate straight line by the calculation of a method of least squares. The respiration speed is determined from the inclination of said straight line and is outputted 29.