A calibration device for measuring instrument of steel protective layer

Abstract

The invention discloses a calibration device for a cover protectometer. The calibration device comprises a protective layer standard block and standard round rods, the protective layer standard block is made of non-magnetic materials and is of a square structure, through holes are formed in the upper end face, a calibration working plane is arranged on the lateral face, the standard round rods are arranged in the through holes, and the protective layer standard block is in detachable connection with the standard round rods. The series of standard round rods and the protective layer standard block provided with the series of standard round rods are adopted in the calibration device for the cover protectometer, the calibration of the instruments like reinforcement cover thickness measurement instruments can be achieved, the calibration process is simple and convenient, and the calibration result is accurate and effective. The calibration device is simple in structure, the standard round rods and the protective layer standard block are designed in a separated mode, independent oil seal protection can be conducted on reinforcing steel bars, corrosion of the reinforcing steel bars is avoided, and the calibration device is more stable.

Description

technical field [0001] The invention relates to the detection and calibration of a steel bar protective layer measuring instrument, which belongs to the field of performance calibration of steel bar protective layer measuring instruments. Background technique [0002] At present, the calibration of instruments for measuring steel bar diameter and protective layer thickness is mainly based on JJF1229-2005 "Calibration Specifications for Measuring Instruments for Steel Bar Cover and Floor Thickness". At present, the calibration method used in this calibration specification is to use the instrument to be calibrated to measure the diameter of the steel bar in the standard block and the thickness of the protective layer. The standard block is composed of non-magnetic materials and steel bars, and there are two types of composition, one is a detachable steel bar protective layer test block, and the other is an integral protective layer standard test block. The integral standard t...

AI Technical Summary

Problems solved by technology

For the detachable reinforced protective layer test block, when calibrating the protective layer thickness, different calibration points should choose different block heights, and the process of repeatedly changing the block appears to be more complicated

For the integral steel bar protection layer standard block, because there are many calibration points, more test blocks are required, so it is inconvenient to make and use

In addition, the steel bars of the integral standard test block cannot be well protected, and the steel bars are easily corroded and oxidized, resulting in inaccurate calibration results

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