Fluid flow speed and/or temperature measuring method for use in e.g. closed flow system, involves deriving flow speed and/or temperature of fluid flowing through measuring sections from simultaneously determined delays of ultrasound signals

摘要

The method involves designing a measuring section (20) between an ultrasound sensor (10) and an ultrasound receiver (14) placed downstream relative to the sensor in a flow system. Another measuring section (22) is designed between the sensor and another ultrasound receiver (18) placed upstream relative to the sensor, and fluid flows through the sections. Delays of ultrasound signals inside of the sections are simultaneously determined, where the signals are provided by the sensor. Flow speed (v) and/or temperature of the fluid are derived from the delays and an impulse is given to the sensor. An independent claim is also included for a device for measuring flow speed and/or temperature of fluid.