摘要：AbstractWith the rapid development of microelectronics, computer, sensor and communication technology, the measuring and controlling of hydraulic structures has gradually realized automation and intelligent information collection will be more and more perfect. As a commonly used hydraulic structure, sluice gate needs to be combined with modern technology to provide basic data and control flow in more scientific and efficient ways. Different discharge methods are available to determine discharge under sluice gates. The present paper designs a new float type float and proposes a way to measure the discharge through the gate. This paper compares the new equation of (Q) with (e/H) under free flow condition with proposed equations by other researchers. The results shows that other equations fail to accurately determine the flow rate for the cases of free flow, while employing the new proposed equations can result in more accurate discharge estimation within the given ranges of the experimental study. The development of velocity profile under sluice gate is examined, and the effects of shear stress are studied. The new method can be used to predict the performance of sluice gates with different sizes under free -flow situations. These results may attract and guide numerical modelers of flow. A free flow automation measuring and controlling system based on single chip microcomputer and sensor can be designed, which will be application of computer, sensors and other modern technology. Thus realizing scientific water management, optimal allocation and accurate measurement of water resources.
