Improvement and Possibilities of Application of Calibration Methods for Optoelectronic Vibration Displacement Sensor

The article describes noncontact measurement tools for the vibration parameters of various products. The characteristics of noncontact sensors for measuring displacements, deformations, and vibration parameters with operating principles of different physical nature were compared. In the model of diffuse-specular reflection, the efficiency of optocouplers for the development of noncontact vibration displacement sensors was substantiated. The urgent tasks of research and development of sensors using near infrared (IR) radiation reflected from the controlled object surface were formulated. A research methodology based on contemporary algorithms and means of digital processing of vibration signals was proposed. Difficulties in studying the metrological characteristics of sensors in broad dynamics and frequency ranges using electrodynamic shaker boards were discussed. The results of a field study of the main metrological characteristics of an optoelectronic sensor prototype providing measurement of displacements with an amplitude of up to 5 mm in the frequency range of 0–3000 Hz were presented. The results of the analysis of amplitude-frequency characteristics of the sensor in the range of 5–3000 Hz, obtained with the use of two disks manufactured using a 3D printer, were presented. The advantages and disadvantages of noncontact sensors based on IR optocouplers were discussed.