Optoelectronic Vibration Measurement System Available to Purchase

During mechanical testing in many cases it is necessary to measure real oscillations of the objects themselves, or their parts. In such cases a method can be used, which uses optical image of the object. When the object oscillates and there is optical visibility of the object’s surface, nearly always one can form an optical image of contrast part of the object. If the object oscillates mainly in the plane which is perpendicular to the axis of optical visibility, then it is possible to measure displacements of this image. For these measurements a special optoelectronic system was designed. This paper describes the results of investigations and creation of a model of such optoelectronic system. This particular model was designed especially for vibration measurements of some hardly-accessible parts of aviation devices: turbine coolers, overheated parts of aviation engines from some distance (several meters). During investigations it was revealed, that system’s applications are much wider than the ones used at the beginning. So in this paper also presented are results of measurements of the system for aviation engine blades; for rotors’ balancing; for vibration testing of aviation turbine coolers; for vibration measurements of elements of printed circuit boards in electronic devices; for various parts of constructions; for acoustic loudspeakers; for active objects (which emit light themselves); in automobile industry; for distant measurements (hundreds of meters); and for some medical applications. The main problem during system design was to eliminate errors of measurements. These errors took place because various objects have different size and shape, and they emit or reflect different amount of light. Without compensation the total error would be about hundreds of percent. So all errors were analyzed, classified, mathematically modeled and created were special loops for errors compensation. As a result total error of measurement was less that 15% for all conditions of use. The system has build-in block for self-testing. During design it was provided that the system can be applied for indoor and outdoor conditions. Special climatic testing have confirmed that.