Current meter high-speed linear formula integration detection method and detection device

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 integral verification method and verification equipment of a rotor-type flowmeter used for measuring water flow velocity in the field of river hydrological testing. Background technique [0002] The flow meter is a conventional instrument for measuring water flow velocity in the field of river hydrology testing. In recent years, the management of water resources has been strengthened, and the measurement work has become more important. It is required that the flow meter verification unit can issue a legal verification data report, that is, the flow meter verification tank has passed the national measurement certification, and its verification results are as national as industrial instruments. Legal metrological accuracy. [0003] Problems existing in the current flow meter verification [0004] 1. The accuracy of the flow meter verification results in all countries in the world does not have the le...

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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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