Calibrating device for vibrating string type strain transducer

Abstract

The invention discloses a calibrating device for a vibrating string type strain transducer. Mounting blocks at two ends of the vibrating string type strain transducer are sleeved on a fixed lantern ring, the lantern ring is arranged on a bracket through a locking piece, a spinodal handle is connected with a dial gauge through a threaded differential fine tuning mechanism, the dial gauge is arranged on a gauge stand, and two ends of the gauge stand are connected with the threaded differential fine tuning mechanism and the vibrating string type strain transducer respectively; the number of measuring bars is two, the two measuring bars are fixed at the upper and lower ends of a bracket respectively, two ends of an extensometer are connected with the two measuring bars respectively, the extensometer is connected with a measuring indicator, and the extensometer is positioned on one side of the vibrating string type strain transducer; and a frequency meter is connected with the vibrating string type strain transducer. Based on the differential thread transmission principle, the calibrating device realizes the function of rotary fine tuning movement, has high measurement accuracy, realizes wide-range measurement, is simple to operate, calibrates the vibrating string type strain transducer through simulation, and is applicable to the metering calibration for various graded places.

Description

Technical field [0001] The invention relates to a metering calibration equipment, in particular to a vibrating wire strain sensor calibration device. Background technique [0002] In the field of civil engineering and structure, the measurement of small and small deformations of structural parts commonly used displacement gauge measurement and electrical strain measurement technology (resistance strain gauge measurement). Generally, the measurement accuracy of displacement meters is low, which is not suitable for the occasions of measurement accuracy; although the electrical strain measurement technology has high measurement accuracy, it is inconvenient to use, especially under the conditions of field operation, no power supply and poor environment. Both measurement and measurement are affected to a certain extent, and operators need to have certain professional testing skills. [0003] However, in the field of engineering structure deformation testing, a vibrating wire strain sen...

AI Technical Summary

Problems solved by technology

[0006] The existing calibrator generally uses a dial gauge as a measuring tool, with a range of 1-3mm and a resolution of 1‰. The disadvantages are that the measurement range is small and the measurement resolution is low.

Images