SU435494A1 - DEVICE FOR DETERMINATION OF DIFFERENTIAL MAGNETIC PERMITTIVITY OF FERROMAGNETIC CORDERS - Google Patents

Description

one

The invention relates to the field of magnetic measurements: rhenium and can be used to measure the diameters of their parameters of ferromagnetic Cores.

Devices are known for determining the differential-magnetic permeability of ferromagnetic hearts, comprising an excitation winding with a series-connected active solenoid and a vapor winding of an air conveyor, a measuring winding and an out-of-display unit.

However, the known devices do not provide direct measurement and differential lonidement and have high accuracy, as an electronic oscilloscope is used as an indication unit, which is their main disadvantage.

The purpose of the invention is to improve the accuracy of determining the thickness and to ensure the possibility of obtaining direct differential magnetic permeability.

This is achieved by the fact that the proposed device is equipped with three stroboscopic converters, a generator of building pulses, its input is connected to the secondary winding of an air transformer, and the OUTPUT - to the first inputs of the three stroboscopic converters, the second inputs of which are connected respectively to the measuring winding sample, to the secondary winding of the air transfer transformer and to the akvivnom resistance, dividing unit (voltage, its inputs are connected to the outputs of the first and iBTOporo stroboscopic photoelectret, wherein the display unit is configured as an XY ca iopictsa and digital indicator whose inputs are connected to the outputs of the block dividing voltages and third stroboscopic preoorazovatel.

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The drawing shows the scheme of the proposed device.

The device contains a test specimen with magnetizing 2 and measuring 5 windings, active resistance 4, connected5 in series with 1ch magnets (winding 2 and primary winding of air transformer 5, stroboscopic devices 6-8, the inputs of which are connected respectively to Measurement winding 3,

0 to the secondary winding of the air transformer 5 and to the active resor; 4, generator 9 strobe pulses, its output is connected to strobe converters 6-S, block W deLagni voltages, the inputs of which are connected5 to the outputs of strobe converters 6 and 7, respectively, and the // display unit, including a two-coder recorder 12 and a digital indicator 13, their inputs are connected to the outputs of blocks 8 and 10.

The device works as follows: m-about.

The voltage drop from the resistance of 4 E at certain points in time starts the generator 9 strobe stimuli, the output pulses of which go simultaneously to three lines: Pichesk-1l converter 6-8 and lushes them.

At the same time, the voltage at the output of the stroboscopic converter 6 is proportional to the derivative of induction in the sample, Vorevn, and the voltage at the output of the stroboscopic converter 7 is proportional to the derivative of the magnetizing current with respect to time or, in the case of testing a ring sample, derived from the voltage of the field according to time, and the voltage at the output of the stroboscapacic converter is proportional to the lap position of the field. Blocking 10 voltages, by dividing the output voltage. The inverter 6 1 to the output voltage of the strobe generator 7, produces a signal proportional to the differential magnetic permeability.

This signal is one coordinate of the recorder 12 and the digital indicator 13. The other coordinate of the display unit // is the output signal of the strobe converter 8, proportional to 0 (the minimum field strength in the sample.

Thus, using the proposed device, it is possible to directly measure the differential magnetic permeability and, if necessary, to obtain

in the graphical dependence of the desired Parameter on the intensity of the sex.

Subject invention

A device for determining the differential bulk permeability of ferromagnetic cores, comprising an excitation line with a series of active resistance to primary winding of an air transformer, from a measuring winding and an indication unit, characterized in that, in order to improve accuracy, and ensure | st and obtain the direct value of the differential magnetic permeability, the device is equipped with three stroboscopic converters, a generator of gating pulses its input is connected to the secondary secondary winding of the air transformer, and to the first inputs of three stroboscopic transducers, the second INPUTS of which are connected respectively to the measuring winding of the sample, to the secondary winding of the air transformer coil, and to a1 resistive resistance, block voltage, its inputs are connected to the outputs of the first and second stroboscopic converters, in this case, the unit, in the form of an adapter, is made in the form of a two-coordinate recorder and a digital indicator, whose inputs are connected to the output block dividing voltages and third stroboskopichgsko th transducer.