Method and device for calibrating current meter flow direction

Abstract

The invention relates to a method and a device for calibrating a current meter flow direction. The device comprises a compass, a tray, a support and a test table, wherein the test table comprises a supporting frame and a table plate; the compass is fixedly arranged in the center of the table plate; the support is connected onto the tray; and the tray is connected onto the table plate in a rotating mode. The calibration method comprises steps: (1) the current meter is placed on the current meter flow direction calibration device; (2) the level of the current meter is adjusted, and a detector is started; (3) the flow direction degree of the current meter is detected, and the reading of the current meter and the scale on the compass at the corresponding position are recorded; (4) the tray is rotated to a next position, and the calibration operation is repeated; and (5) the differences between the flow direction degrees at measurement points and scales on the compass are compared, if the average value of the differences is no smaller than +/-4 DEG, the measurement parameters of the current meter are adjusted, and the test operation is repeated until the average value of the differences is smaller than +/-4 DEG. The structure is simple and easy to carry, calibration operation at any time is facilitated, the method and the device are suitable for flow direction calibration on various current meters, the calibration process is optimized, and the current meter flow direction accuracy and the flexibility are improved.

Description

technical field [0001] The invention belongs to the technical field of measurement and relates to the calibration of measuring instruments, in particular to a method and device for calibrating the flow direction of a current meter. Background technique [0002] Ocean currents are important parameter data for the study of marine dynamic environments, and play an important role in the development of marine resources, environmental information security, and scientific research. A current meter is an instrument that measures the velocity and direction of seawater. Current meters have entered all walks of life, especially for the important tasks of national ocean forecasting and marine surveys. The accuracy of current meters is related to the accuracy of national ocean forecasting. The verification / calibration of the current meter is mostly carried out in the current meter verification tank of the water conservancy department. Since the current meter verification tank can only v...

AI Technical Summary

Problems solved by technology

The verification / calibration of the current meter is mostly carried out in the current meter verification tank of the water conservancy department. Since the current meter verification tank can only verify / calibrate the speed, there is no standard equipment and unified method for direction calibration. It is only carried out by using an ordinary compass. The calibration tools are bulky and rough, the calibration steps are complicated, and the calibration accuracy cannot meet the requirements

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