A high-speed straight line formula integral verification method and its verification equipment for a current meter

Abstract

The invention discloses a current meter high-speed linear formula integration detection method and a detection device. The method comprises the following steps: cleaning a ball bearing; detecting average frictional resistance moment M of the ball bearing; detecting a propeller current meter rotating speed V0 and an instrument rotation bearing internal frictional resistance moment M, and confirming that a standard is reached; fixedly installing three detected current meters at the lower end of a measuring rod and placing them into water of a detection water tank; adjusting an axial directions of the current meters; tranquilizing a water body in the tank; starting a motor, a detection vehicle running from a lowest speed and gradually increasing its speed, and detecting instrument output signals and data; and according to a GB / T21699 detection method of rotor type current meter in linear open channel, by use of a least square method, calculating values of a and b of a detection formula and a middle and high-speed whole-line average mean square deviation sigma. According to the invention, the program and steps of a conventional detection method in the prior art are substantially simplified, the precision of detection results of the current meters can be ensured, at the same time, the production efficiency is improved, the working conditions are improved, the management rules are simplified, manpower and material resources are reduced, and the production operation cost is decreased.

Description

technical field [0001] The invention relates to a high-speed linear formula performance verification method and verification equipment of a rotor-type current meter used for measuring water flow velocity in the field of hydrological testing of rivers. Background technique [0002] The current meter is a conventional instrument for measuring water flow velocity in the field of river hydrological testing. It is widely used in technical fields such as national water resource development and utilization, basic hydrological element testing, water volume monitoring of international rivers, and water supply and drainage measurement. In recent years, the management of water resources has been increasingly strengthened, and measurement work has become more important. It is required that the verification unit of the flow meter can issue a verification data report with legal effect, that is, the verification water tank of the flow meter has passed the national measurement certification,...

AI Technical Summary

Problems solved by technology

[0006] 3. Systematic error, the analysis of a large number of verification results shows that the nature of the flow meter verification is not completely random measurement, and there may be some systematic error

[0017] 12. Low production efficiency

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