SU922814A1 - Device for recording and reading-out information from magnetic carrier - Google Patents

Description

The invention relates to the field of magnetic recording and can be used for recording and reproducing information on 'flat ferromagnetic products.

A device for determining the location of coke machines is known, in which, in order to improve the accuracy of the read head, they are made in the form of a combination of single-slot and double-slot magnetic heads arranged coaxially inside the center of the recording head (13.

The disadvantage of this device is the low density of recording digital information with a slight overlap of adjacent labels due to the impossibility of their correct playback at the specified location of the read heads.

The closest in technical essence is a device for reproducing a code from a magnetic medium containing a recording unit,

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connected to the recording head, a read head, one of which is made single-slot., connected to a block of code playback, consisting of two, connected by outputs through logical elements NOT and AND, amplifying-conversion channels. In order to increase the information recording density on the profile magnetic carrier, both single-slot heads are located in mutually perpendicular planes, one of which is a plane perpendicular to the axis of the magnetic carrier, and the other perpendicular to its side face, while the axes of the read heads are offset from each other by a distance equal to half G2 recording head width].

A disadvantage of the known device is the low reliability of its work when reading digital information applied by the method of transverse magnetic recording on a flat

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ferromagnetic product (rolled, large diameter pipe, etc.), due to a sharp decrease in the output signal of the second read head.

The purpose of the invention is to improve the reliability of reading digital information.

This goal is achieved by the fact that the axes of the read heads are parallel and are located from the intersection line 1 of the mutually perpendicular planes of the recording heads at a distance along the axis of the magnetic carrier equal to half the width of the recording head, in the direction perpendicular to the axis the recording head gap and half the thickness of its pole.

The drawing shows the functional diagram of the device.

The device contains a flat magnetic carrier 1, recording unit 2, recording head 3, single-slot recording heads 4 and 5, code playback units 6 and 7, resonant amplifiers 8 1.1, phase detectors 12-15. Threshold elements 16-19, HE elements 20 and 21, the elements And 22 and 23, the decoder 24 and the Executive unit 25 ·

The device works as follows.

Magnetic labels are applied to the surface of the magnetic carrier 1 by the head 3 for transverse recording by current pulses of different polarity, coming from the recording unit 2 (the drawing shows the sequence 011).

With the mutual movement of the magnetic carrier and the heads 4 and 5 of the readout, signals appear at their output that have maxima in the center of the magnetic prints. (The head 4 is read when moving along the X-axis reads the horizontal component of the magnetic field strength of the mark along the мет axis, and the head 5 of the read is moving along the 'X-axis' reads the horizontal component Η ^ _χ ι along the X axis ¹ ). The read heads 4 and 5 are single-slot, the head 4 is located in a plane parallel to Υ0Ζ, and moves along the axis above the carrier 1, with the axis of the reading head 4 parallel to the axis 0Υ; read head 5 is located in the X'O ¹ Υ ¹ plane, while the axis of the head 5 is parallel to the axis of the head 4. The axis of the head 5 is shifted

that relative to the axis of the head along the axis 0Ζ to the distance and along the axis O'X '- to the distance. Signals from the readings are sent to

5 code playback units, in which they are amplified with the help of resonant amplifiers 8–11, then of them with the help of phase detectors 12–15 and threshold elements

О informational signals are singled out and normalized logical signals are formed, which, directly and through logical elements, are NOT fed to logical elements AND 22

5 and 23, from the outputs of which the logical signals "0" and "1" are fed to the input of the decoder 24, where the readable code combinations are decrypted and fed to the execution unit 25 ·

О The technical and economic effect of the use of the present invention is to improve the reliability of reading digital information recorded on a flat ferromagnet:

5 products.

Claims (1)

Claim A device for recording and reading information from magnetic media, containing a writing unit, ₀ connected to the recording head, two single-slot read heads located in mutually perpendicular planes, one of which is perpendicular to the axis of the magnetic carrier, and the other is perpendicular to the side of the ^5th carrier edge, connected to playback units, connected through elements AND and NOT to serially connected decoder and executive unit, characterized in that, in order to increase the reliability of the device, the head axis The readings are parallel and are located from the intersection line of ⁵ per head of recording heads mutually perpendicular to the plane at a distance along the axis of the magnetic carrier equal to half the width of the recording head, and in the direction perpendicular to the axis, to Half the width of the working gap of the recording head and half the pole thickness.