STUDY ON LOW POWER CONSUMPTION OF KALMAN FILTER

摘要

In the 21st century,high-precision and high-resolution velocity measurement has been realized,and ultrasonic flow measurement technology has been greatly improved.However,the flow measurement algorithms of mature products are relatively confidential at home and abroad.Research shows that the Kalman filter algorithm has application potential in the monitoring and measurement of ultrasonic flow.Therefore,this paper applies the Kalman filter algorithm to the current ultrasonic flow measurement technology and proposes an improved Kalman filter algorithm that adapts to the change of flow characteristics.The Kalman filter algorithm is successfully applied to the ultrasonic velocity measurement system by introducing an adaptive factor into the algorithm.When the flow rate is 1000 mLmin"1,the measurement error range is reduced from ±50 mL min"1 to ±5 mL min'1.At the same time,correction parameters a and b are introduced respectively,finally the accurate measurement of the flow rate by the ultrasonic testing system at low flow rate and high flow rate is realized,and the error ranges are reduced to ±0.1 mL min'1 and ±2 mL min" 1 respectively,which ensures the accuracy and stability of flow measurement,reduces the calculation complexity and takes into account the low power consumption performance.