SU509141A1 - Oscillographic ferrometer - Google Patents

Description

(54) FERROMETER

one

This invention relates to a technique of fast magnetic pulping of core samples and products from ferromagnetic materials in strong alternating magnetic fields.

Yoz.; Wall ferrometer ps zgt.sg .. j. 497S44 which has the disadvantage of low magnetic efficiency. and add additional errors when measuring by the method of comparison with a normal sample placed in the cavity of the solenoid parallel to the sample being measured.

The purpose of the invention is to measure the magnetic efficiency. and reduction of the rogro-anosta measurement.

This is achieved by the fact that the proposed ferrometer is supplied with a signal storage device of the reference sample connected between the measuring coil and the magnetization channel integrator, daily as a two-way magnetic drum with a synchronous motor connected to the source with a magnetizing device, with a smooth rotation mechanism around the shaft axis, for example worm gear pair, two annular reproducing heads installed diametrically opposite to the drum body so that their distance The working gaps from the drum surface is O h IJT Le D. - the wavelength of the oapgisan signal, e is the non-linearity of the kill of the residual recording flow. The windings of one head are connected to the parallel-connected inputs of the adder and the subtractive device through a level regulator, and the other to the other inputs of the specified adder and subtractive device through phase shifters with shear angles T and 7Г / 2, respectively. At the output of the detracting device, a zero is turned on — the indicator, the output of the adder is connected via a switch to the input of an electronic switch or a differential amplifier.

The drawing shows a functional diagram of the proposed ferrometer.

A single-layer ellipsoidal winding 1 frequency audio floor is included in a single-turn P -. shaped secondary winding of the lower transformer 2. The confocal ellipsoidal winding is wound cylinder-ellipsoid-eiconically magnetic bias winding 3. Measuring coil 4 and compensation coil 5 are connected in series to the first winding and connected to the measuring input

of the magnetization channel 3 containing the input level regulator 6 and the amplifier 7, the output of which is connected to the input of the electronic switch 9 or to one of the inputs of the differential amplifier 10 by means of a switch 8 to the other input of the electronic switch by means of a switch. The outputs of the electronic switch and the differential amplifier are connected to the input of the integrator 11, whose input is connected to the calibrator 12 of the channel and the input of the phase-corrector 13, which is connected to the vertical input of the oscillographic unit 14.

The memory device includes a two-track magnetic drum 15 on air lubrication, fixed in two axial positions I and I by means of a translationally moving slide 16 connected to the flexible shaft 17 of the drum. The shaft is connected by a telescopic clutch 18 to a synchronous electric motor 19, which is powered from a single source with a transformer, and the rotation mechanism in the form of a worm gear pair 20 is installed coaxially to the electric motor shaft.

In the case 21 of the magnetic drum, annular reproducing heads 22 are diametrically mounted, the distance between the surface of the drum PI by the working gaps of the heads lies in the linearly decreasing zone of the residual recording flow, which is ensured by a Å Afe / JiT where a is the distance between the surface of the drum and working gap head: D wavelength of the recorded signal; and - the permissible non-linearity of the ubyuan of the residual write stream is valid. One of the heads is connected via phase shifting devices 23 and 24 to the first inputs of the adder 25 and subtracting device 26, and the other through a level regulator 27 to the second inputs of the adder and subtracting device. A null indicator 28 is turned on at the output of the detractor device, and the output of the adder 25 is connected by a switch 29 to a vertical input of an oscillographic unit or to a two-position switch, the fixed contacts of which are connected to the inputs of an electronic switch and a differential amplifier.

A sub-magnet and a winding filter set-up filter 30 and a calibrator 31 are connected to a source of a magnetising current. Transformer sensor floor has a secondary

separating winding in the form of a toroidal coil, wound with stranded wire and installed coaxially with the secondary winding of the transformer and connected to the switch 32. The output of the switch

A field H is connected to the input of the channel containing an integrator-phase shifter, the output of which is connected to the horizontal input of the oscilloscope unit.

The ferrometer operates as follows. Before measuring, the magnetic drum, on which the signal 3 (t) of the normal sample and the clock sinusoidal signal are recorded, is set in the I position with the aid of the scenes, in which the track with the recording of the clock signal is fixed against the reproduction heads. The signals from the reproducing heads, having at each instant proportional and opposite to the sign of the deviation of the impedance, caused by radial beats -1 and the drum arrive at the inputs of the subtractive device through the level control and the photoelectric shifting device, shifting the signal by the angle JT / 2. Through the level-4 adjuster and the null indicator, the inequality of the amplitude values of the signals taken from the heads, due to non-identical recoil, is eliminated, after which the drum is transferred to the I position of reading the signal 3 (f). In this case, the adder adds the instantaneous values of the signals d / s / f shifted by the phase-shifting device by the angle UT and the deviations having an equal magnitude and the opposite sign are mutually compensated. The phase correction of the total signal d 5 / s / 1 is carried out by turning the motor around the axis by means of, for example, a worm gear, and the indicator is an oscillographic unit connected for this by a switch. The amplitude and phase-corrected signal from the adder through the switch enters the inputs of the electronic switchboard or the differential amplifier 10, to the other inputs of which simultaneously a signal from the measuring coil proportional to c) J / c is fed through the level regulator. As a result, a combined image of the magnetization reversal loop of the test and normal samples or difference loops is displayed on the screen of the cathode ray tube, the parameters of the vertex of which are measured by the calipers of the 5, H channels and the magnetizing sequence graduated in magnetic field.

Claims (1)

Invention Formula Ferrometer autol. No. 497544, differing in that in order to increase the magnetic efficiency. and reduce measurement errors, it is equipped with a c / J / C / t signal storage device of the reference sample, connected between the measuring coil and the magnetization channel integrator, executed in the form of a two-track magnetic drum with a synchronous motor, connected to one with a magnetizing device, a smooth mechanism rotation around the axis of the shaft, for example, a worm gear pair, two annular reproducing heads, which are diametrically opposed in the drum casing so that their working distance their gaps from the surface of the drum are QL jT, where D. is the wavelength of the recorded signal, fe is non-linear, killing the residual recording flux, and the windings of one head are connected to parallel inputs of the adder and the reading device through the level regulator, and the other to to other inputs of the specified adder and subtractive device through a phase shifting device VA with shear angles, respectively, ST and JT, and at the output of the subtractor device a null indicator is turned on, the output of the adder is connected through a switch with the input of an electronic switch or a differential amplifier.