Application of Multiparameter Kalman Filter in Ultrasonic Water Meter

Table 1

Influencing factors of ultrasonic flow data and sensor data collection.

Flow rate (m/s)	10	10.2	10.1	9.8	10.2	10.1	10.2	10.1	10
Temperature (°C)	25	25.3	25.5	24.9	25.3	25.1	25.3	25.2	25
Speed of sound (m/s)	1494.463	1495.234	1495.744	1494.204	1495.234	1494.720	1495.234	1494.977	1494.463
Time difference (ns)	895.4884	912.4562	902.8941	877.8824	912.4562	904.1313	912.4562	903.8204	895.4884