Investigation of the error measurement of ultrasonic sensors for measuring water flow in open canals of irrigation systems

This paper analyzes ultrasonic flow meters that provide stability of metrological characteristics during operation, low cost of meter maintenance, high reliability and sensitivity, and high performance in large diameter pipes and open chanels. Based on the analysis, the requirements of the reclamation systems to the sensors, the causes of the error are formed. The difference between the speed of sound in the opposite direction of the flow direction or in the direction of flow in the ultrasonic sensors was studied. The measurement errors of ultrasonic sensors currently widely used in open canals are investigated graphically. Based on the analysis results, it is recommended to use an ultrasonic sensor suitable for the extreme conditions of our country.