Correction method of flow measurement properties of single-track ultrasonic water meter

The invention discloses a correction method of flow measurement properties of a single-track ultrasonic water meter. The correction method comprises the following steps: 1) respectively calculating surface average flow speeds when a reynold number is an upper limit value of a laminar flow state, a lower limit value of a turbulent flow state and the upper limit value of flow measurement of the water meter; 2) calculating linear average flow speeds corresponding to the surface average flow speeds according to an existing known calibration equation; 3) establishing fitted linear correction equations during the laminar flow state, a transition flow state and the turbulent flow state; and 4) measuring the linear average flow speed Nu through the ultrasonic water meter, comparing Nu with V1 and V2 and performing correction according to the appropriate fitted linear correction equation according to a comparison result. According to the correction method disclosed by the invention, the correction is performed on the flow measurement properties of the ultrasonic water meter by setting the simple linear correction equations under the different flow speed distribution states, and the calculation is simple and fast; and furthermore, the requirements on measurement accuracy of the ultrasonic water meter within a whole flow measurement range can be met by fine adjustment of 2-3 flow points under an actual flow state, and the effects of simplicity, convenience and accuracy can be also achieved.