SU1679354A2 - Physical and mechanical parameters control method for ferromagnetic materials - Google Patents

Abstract

The invention relates to non-destructive testing and can be used to control the quality of both ferromagnetic and non-ferromagnetic materials. Expansion of the field of use is achieved by controlling also products made of non-ferromagnetic materials. Before the measurement, the ferromagnetic sample 10 is installed in the zone of electromagnetic interaction with inductive converter 2. By changing the frequency of the generator 1 and changing the capacitance of the capacitor 7, the indicator 6 remains constant when interacting with the object being monitored and in idle mode. According to the obtained values of the capacitance and frequency, the physicomechanical parameters of 1 sludge are estimated.

Description

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The invention relates to non-destructive testing and can be used to control the quality of both ferromagnetic and non-ferromagnetic objects. The purpose of the invention is to expand the field of use by controlling also products made of non-ferromagnetic materials. This is achieved by allowing control of non-ferromagnetic objects. The drawing shows the block diagram of the device for implementing the method. The device contains a variable frequency generator 1, connected in series by a parametric inductive converter 2, a switch 3 and a reference resistor 4 connected to the output of a variable frequency generator 1, connected in series by an amplitude detector 5 connected to a reference resistor 4, and an indicator 6 compensating variable capacitor 7

a capacitor connected in parallel with the converter 2 and a switch 3, a frequency measurement unit 8 connected to a generator 1, a capacitance measurement unit 9 connected to a compensating capacitor 7. The device also contains a sample 10 of ferromagnetic material. The measurements according to the proposed method are carried out as follows. In a variable transducer of an inductive converter 2, a test article made of a nonmagnetic electrically conductive material and a sample 10 of a ferromagnetic material are simultaneously placed. By varying the frequency of the supply generator 1, at a constant voltage at its output, and by changing the value of the capacitance of the compensating capacitor 7, the state of the indicator 6 oscillator stops simultaneously

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at two joint positions of a test article made of a non-magnetic electrically conductive material and a reference sample 10 made of a ferromagnetic material — in an alternating magnetic field of the inductive converter 2 and outside. At this moment, the frequency of the generator 1 and the value of the capacitor of the compensating capacitor 7 are stopped and the operating frequency of the generator 1 is measured with the help of frequency measuring unit 8, and the capacity of the compensating capacitor 7 is measured with the help of capacitive measuring unit 9. and frequency generator 1 trial t

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about the physicomechanical parameters of controlled products made of non-magnetic electrically conductive materials.

Claims (1)

Claims of Invention The method of controlling the physicomechanical parameters of products made from ferromagnetic materials 1499215, characterized in that, in order to expand the scope of use by controlling also products made of non-ferromagnetic materials, prior to measurement, a sample made of a ferromagnetic material is placed in the zone of electromagnetic interaction with the eddy current transducer.