Method for implementing open-channel flow measurement by mechanical structure
A technology of flow measurement and mechanical structure, applied in the direction of measuring flow/mass flow, liquid/fluid solid measurement, measuring devices, etc., can solve problems such as measurement failure, insufficient power supply continuity, and susceptibility to external noise interference, etc., to achieve Effects that are not disturbed by noise
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[0027] 1, the technical basis of the present invention is:
[0028] Let the cross-sectional area of the channel be S, S is a function of water level h, h is a function of time t, then S=S(h), h=h(t), that is: S=S(h(t))
[0029] Q T = ∫ 0 T S ( h ( t ) ) V ( t ) dt - - - ( 1 )
[0030] Where V(t) is the average water velocity of the section.
[0031] Insert an impeller at this section, half of which is blocked by the casing, so that rotation will occur under the impact of the water flow, satisfying: V(t)=Rω(t), where R is the hydraulic radius of the wheel blade, and ω(t) is The rotational angular velocity of the impelle...
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