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介绍堰式和槽式明渠流量计的测量原理，提出了一种新的堰式流量计算公式。重点介绍抗沾污电容式液位传感器及以单片机为核心的显示仪表构成的智能明渠流量计，给出了试验结果。
This paper introduces the measuring principle of weir and trough open channel flowmeter and proposes a new weir flow calculation formula. Focus on the anti-staining capacitive level sensor and the microcontroller as the core of the instrument consisting of intelligent open channel flowmeter, the test results are given.