METHOD FOR DETERMINING POSITION OF DIELECTRIC GAP IN ELECTRICAL CONDUCTING OBJECT AND DEVICE FOR IMPLEMENTATION THEREOF Russian patent published in 2018 - IPC G01B7/04 G01N27/90 

FIELD: measuring equipment.

SUBSTANCE: invention relates to a measuring technique and can be used for the location of the bar-to-bar gap of the collector of an electric DC machine, for example, with the restoration of traction engines in the conditions of repair production of an electric depot. Proposed method consists in scanning across the bar-to-bar gap with an eddy current transducer, subjecting it to vibration along a tangent to the control surface in a direction with an amplitude commensurate with the width of the monitored gap, and a frequency much lower than the excitation frequency of the eddy current transducer, and with the possibility of forming its conversion characteristic in the form of an odd function. Device implementing the method is supplemented with an electromechanical vibrator made in the form of a co-axially coupled permanent magnet and an excitation coil rigidly fixed to the body of the device and connected to the output of a low frequency generator, and two parallel oriented elastic conductors, the first ends of which are rigidly connected to the device body through the insulating elements and connected to a high-frequency generator, and the latter by said permanent magnet and a horseshoe-shaped magnetic circuit, the plane of the latter being perpendicular to the direction of scanning, the winding of the eddy current transducer is connected to the second ends of the elastic conductors, the measuring unit is equipped with a detector connected to the coil of the eddy current transducer and a filter connected in series with it and a phase-sensitive rectifier, the reference input of which is connected to the output of the low-frequency oscillator, and the output to the zero-indicator.

EFFECT: increase in the sensitivity of the determination of the middle of the dielectric gap and, consequently, its location in the electrical conductive object.

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