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

A flow meter and straight line technology, applied in the testing/calibration of speed/acceleration/shock measurement equipment, speed/acceleration/shock measurement, instruments, etc., can solve problems such as low production efficiency and system errors, and achieve reliable verification accuracy, The effect of reducing water resistance and water body fluctuations and avoiding deflection

Active Publication Date: 2016-09-21
JIANGSU NANSHUI WATER AFFAIRS TECH CO LTD +1
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  • Abstract
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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

Method used

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

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Embodiment Construction

[0066] The technical solutions in the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. The following examples are only used to illustrate the technical solutions of the present invention more clearly, and cannot be used to limit the protection scope of the present invention.

[0067] In order to ensure the verification accuracy, the present invention utilizes several patents previously applied by the institute:

[0068] a) The ball bearing semi-self-cleaning equipment is selected from ZL200720040307.X; the DM05 bearing torque meter is selected from ZL200720040306.5; the rotating speed detection equipment of the propeller flow meter is selected from ZL02263174.7; Standard Revised Values ​​Design Method for Low Velocity Linear Equations to Determine Flow Meter Low Velocity Performance.

[0069] b) Propeller, through the method of determining the hydraulic pitch b value of th...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01P21/02
CPCG01P21/025
Inventor 周冬生姚刚宗军曹子聪杨汉塘
Owner JIANGSU NANSHUI WATER AFFAIRS TECH CO LTD
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