Full-automatic vibrating wire strain sensor calibration device

Abstract

The invention discloses a full-automatic vibrating wire strain sensor calibration device. The full-automatic vibrating wire strain sensor calibration device comprises a bottom plate, a shaft coupling,a servo motor mounting base, a servo motor, a monitoring sensor, a strain sensor clamping upper cover, a fastening nut, a monitoring sensor clamping column, a bearing cover, a fixing base, a ball screw, a compression bolt, a ball screw nut support, a strain sensor clamping base, a guide shaft, a supporting base, a monitoring sensor clamping block, a precision grating ruler, a round head nut, an angular contact ball bearing, a linear bearing and a fixing bolt, wherein the ball screw and the ball screw nut support are matched to form a cylindrical pair, the ball screw nut support and the linearbearing form a cylindrical pair, the linear bearing and the guide shaft form a rolling pair, one end of the ball screw is fixed on the fixing base through the angular contact ball bearing, and the other end of the ball screw is supported on the supporting base through the angular contact ball bearing. According to the full-automatic vibrating wire strain sensor calibration device, full-automatic,high-precision and rapid calibration of the vibrating wire strain sensor can be realized.

Description

technical field [0001] The invention relates to the field of test and measurement, in particular to a fully automatic calibration device for vibrating wire strain sensors. Background technique [0002] Vibrating wire strain sensors are mainly used in the fields of civil engineering and structures, such as concrete structures, steel structures, bridges, etc. The vibrating wire strain gauges are bonded to the measured objects in advance, and after a period of time, the frequency of the strain gauges is measured. , which can calculate the deformation of the measured object, which is widely used in the construction industry. Since the characteristics of each vibrating wire strain gauge are different, it is necessary to design a vibrating wire strain gauge calibrator to find out the relationship between their deformation and their own vibration frequency through measurement, then in practical application Their deformation can be obtained by measuring the vibration frequency. Si...

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Problems solved by technology

[0005] In the above-mentioned patent, the principle of differential thread structure is used to apply the force. At the same time, the deformation of the vibrating wire strain sensor is measured by the dial indicator after fixing the vibrating wire strain sensor. Although the deformation generated is small and labor-saving, it is driven by the handwheel. Low measurement efficiency and low step accuracy

The disadvantage is that the measurement accuracy of the dial indicator is low, and when the diameter of the measuring strain gauge end seat is different from the installation diameter of the strain gauge installation mechanism, it cannot be effectively fixed, especially when there are lead wires protruding from the axes of both ends of the strain gauge, the hundred The measurement axis of the sub-meter cannot be coaxial with the measurement axis of the strain gauge, which will cause Abbe error

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