TECHNIQUE FOR DYNAMIC ERROR COMPENSATION OF THE DISPLACEMENT MEASUREMENT METHOD BY MEASURING TRANSDUCER OF INDUCTOSIN TYPE, BASED ON PHASE SHIFT MEASUREMENT
DOI:
https://doi.org/10.24025/2306-4412.2.2021.234976Keywords:
measurement error,, measurement method,, displacement measurement,, measuring transducer,, inductosyn.Abstract
Transducers of inductosyn type are widely used to measure displacements in various technical and technological fields. They are differed from others by their reliability, durability, low static measurement error, and ease of maintenance. Currently, a significant amount of equipment, which uses displacement meters based on transducers of inductosyn type is in operation. One of the methods for displacement measurement using inductosins is a method based on the conversion of angular displacement into a phase, a significant disadvantage of which is the presence of a dynamic error of the measurement method. Thus, the task of compensating dynamic error of the displacement measurement method using a measuring transducer of inductosin type, based on the measurement of phase shift, is relevant and is of some scientific and practical interest. The article considers a technique for dynamic error compensation of the displacement measuring method using a measuring transducer of inductosin type based on phase shift measurement, which does not require the use of additional devices to determine the speed of movement of the workpiece, such as tachogenerators. To determine the speed of movement of the workpiece, it is proposed to use the data obtained when measuring the movement with a measuring transducer of inductosin type using a measurement method based on the measurement of phase shift. It is noted that the proposed solution will fully compensate for the absolute dynamic error of the considered displacement measuring method only for cases of uniform or uniformly accelerated motion. In reality, the nature of the executive device motion is determined by the operation of a particular type of electric drive and its components, namely the control system, electric motor, as well as by the characteristics of technological equipment. In the general case, to determine the impact of equipment on the absolute dynamic error, it is necessary to conduct statistical studies for a specific type of electric drive and technological equipment. To implement the considered technique of dynamic error compensation, an upgraded structure of a microcontroller displacement meter using inductosin as a position tramsducer is proposed.
The use of the technique of dynamic error compensation will significantly expand the operational characteristics of the measurement method, namely will increase the accuracy of measurement and significantly increase the maximum value of the workpiece movement speed.
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