A standard virtual sinusoidal linear vibration measurement method

Abstract

The invention discloses a standard virtual sine linear vibration measurement method, which comprises the following steps: calculating the gray scale gradient amplitude of an image, searching the amplitude maximum value in an interval by utilizing the distribution of the gray scale gradient amplitude, and judging whether different motion position targets are overlapped in an interested area in theimage according to the number of the maximum values; Aiming at different superposition conditions of the region of interest, improving the precision of subsequent image processing; using A sub-pixel edge detection method to achieve extraction of moving target feature edges; Introducing a target vibration model, and carrying out model fitting by utilizing a least square method; Finally, carrying out displacement error compensation on the target vibration model, and obtaining the time-displacement measurement curve of virtual sine linear vibration. According to the method, the non-ideal sinusoidal vibration condition of the vibration table caused by factors such as mechanical manufacturing and motion control can be avoided, standard virtual sinusoidal linear vibration is output through Matlab programming, and a virtual traceability way is provided for plane motion measurement based on machine vision.

Description

technical field [0001] The invention belongs to the field of image processing and machine vision detection, and in particular relates to a standard virtual sinusoidal linear vibration measurement method. Background technique [0002] Vibration sensors and measuring instruments are widely used in real-time monitoring and vibration parameter measurement in many fields, such as bridge construction, earthquake, automobile, aerospace, etc. In order to ensure the reliability and accuracy of the measurement results obtained by the vibration sensor and measuring instrument, it is necessary to calibrate the vibration sensor and measuring instrument regularly. [0003] Typical vibration sensor and measuring instrument calibration methods include laser interference absolute method calibration, comparative method calibration, etc. These calibration methods use different measurement methods to obtain the vibration profile of the shaking table, and the calibration of the vibration sensor...

AI Technical Summary

Problems solved by technology

However, due to the influence of errors such as machining and motion control on the vibration table, the vibration form of the vibration table is not a standard sinusoidal linear vibration, resulting in large errors in the existing calibration methods.

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