JPS586581A - magnetic bubble detector - Google Patents

Abstract

PURPOSE:To stably detect information, by making the direction of a current path piece of a chevron pattern orient to the center of the phase of noise in the rotating magnetic field. CONSTITUTION:A direction theta of current path element pieces 11 and 21 of a basic cell pattern of a detector in case of a trapezoidal wave driving is 15 deg.+ or -30Xn (where; n is an integer). The direction theta is selected at the center of the phases of a rotating magnetic field noise and the phase peak is parted farthest from the noise phase. Thus, the discrimination of ''0'' and ''1'' of information can stably be detected without being effected by noise through the setting of chevron pattern.

Description

DETAILED DESCRIPTION OF THE INVENTION The purpose of this invention is to improve the 0-detection direction of the air pump III.

A configuration diagram of an S-blur magnetic bubble detector using a magnetoresistive sound effect according to the present invention is shown.

Oka-Ks? , D is a detector line forming a detector,
BT is a bubble stretcher that expands magnetic bubbles into a string shape642, and these patterns D and gT are par w c
It is made of soft m-tube thin knitting such as No. 14. In addition, the H blade is a bias magnetic field that is applied to the paper HIrc in each turn in the same plane.

When the eaf4 bubble transferred in the direction of the magnetic bubble arrow P is transferred under the bubble stretcher 8T, it is expanded in the ll4yj direction and becomes a string bubble. B is one of the string-like bubbles expanded by ζ. Also, in 813, ■ is a detector current that is externally marked on the detector line. When the string-like bubble l passes under the detector line D, the output is taken as the output.

In such a configuration for air bubble detection, an example in which the detection output sign wL is a triangular wave is shown in 211.
(&) is an example. In the same figure, Na@01 output, S
嬬@1 Indicates “output t”. As the "l" output, four kinds of stable peaks from P4 to P4 are expected. These four types of stable peaks a-type P1~? One or nine out of 40 will use two to carry out the information O "O", "l beak*1.

In addition, in the same figure, SWN is noise that enters from the -magnetic field system. Bubble f: As a magnetic field HR applied from the outside for winding, examples are shown in Figures 3 (a) to (e).
Three yuzu citrons are often used. 3wA←).

(b) In the case of o-y''in-section triangular IIA plow, Ugly 2 figure (
As shown in a), the noise X8WNi enters the detection output in 90° increments. In the case of the trapezoidal chain drive in diagram (C), the noise 8WN is 30
Enter the -yama output at the 0th position of the knob.

In this 15, due to this -magnetization external noise field WN, I
Due to the IA output power, h111 0-0", 11" has a platform where the 11" size cannot be stably changed to fi2.
In the 11a #5 output tiL carving, Tsuru 4 beak P4
In a system that uses @5'', 101 constant, 2
70th place @osWN Because of the noise, a stable l”-〇1 constant is impossible.Also, in the case of 1i12Peng-)O example O, 8
■For Noime, any of Tsuru I-Mi 4 and Ku PI-
P4 can also be used for @1" and @O" judgment.

As mentioned above, for the conventional magnetic papulus swxo, a stable output waveform peak P1 is used to obtain a stable was not possible.

Therefore, an object of the present invention is to solve the above-mentioned problems,
For the output waveform peak phase useful for “l” and “0” judgment,
The present invention aims to provide a magnetic bubble detector in which rotating magnetic field noise 5WIIJ does not overlap.

The present invention will be explained in detail below.

The fourth magnetic bubble detector line Dlj illustrated in FIG.
Using the basic cell pattern shown in the figure as the basic component,
It is constructed by repeatedly arranging these basic cells left and right.

As illustrated in FIG. #14, the basic cell pattern is formed by two chevron patterns 1 and 2J-1 and short through shorts 3 and 4.

In a magnetic bubble detector composed of such a pattern, the shape parameter J that determines the phase of the output type II beater PlO should be thoroughly investigated. The following items were selected as shape parameters.

■ Combined position of shorters 3 and 4 ■ Shape of chevron patterns 1 and 2 ■ Pattern - ■ Pattern thickness adjustment As a result, the key parameter that directly influences the phase of the output waveform peak Pi is the angle shown in Figure 84. It became clear that this was the case. ζO angle W1# is expanded to form chevron patterns 1 and 2! 811110 piece 10.2@
Among the elements 11 and 21, the elements It and 21, which are the current paths through which the detector current IO flows, are in the 11th direction (phase O reference point)
This is the angle. Here, the element It,21 is named the current path element. First, let us say that this angle 0 is called the current path segment O direction.

5m is an example of experimentally determining the relationship between the II3 peak position 1iva of the -output output housing type and the direction 0 of the current path segment. As is clear from the results of this experiment, there is a 1:10 correspondence between the third peak position @da3 and the directions 0 and 0111 of the electric m path element, and there is a relationship (93=Q). Ta.

After all, the present invention! One way of thinking is to set the chevron pattern shape so that the direction 0 of the current path element of the chevron (turn) that makes up the magnetic bubble detector is the direction that is farthest from the rotating magnetic field system noise SWN phase. It is something to do.

Figure 6 shows an example of an embodiment of a pull detector according to the present invention.
An example of the basic order of e is shown. In the figure, the locus of the rotating magnetic field driven by the trapezoidal wave is also marked with +1 for reference. As is clear from the figure, the basic cell/<turn current path segment 11.
21c1 direction - is θz15°±30Xn (n:!l
1l) ” ” '(1) It is expressed.

Rotating magnetic field system noise I reduction is 311 in case of y# wave drive
1M) It rode on the phase of 230°t1 to indicate K.

By selecting - at the center of the noise IWN phase as in equation (1), the peak phase can be separated farthest from the noise 8WN phase.

The above is an example of trapezoidal wave I motion, but in the case of sine wave drive and triangular wave drive, 5(1) is... - Leu 1o24?
±90Xn, (n: WjI)...(21).

In this way, according to Honjitsu@, by arranging the direction of the current path element of the chevron pattern to be in the center between the noise phases of the rotating magnetic field system, information can be stably transmitted without being influenced by noise. It has nine excellent effects: it can detect QZIIIIII judgment.

[Brief explanation of the drawing]

si diagram is a diagram showing an example of a magnetic bubble detection lIO configuration diagram,
Fig. 2 is a diagram showing an example of a detection output waveform, Fig. 3 is a diagram showing an example of a pulse drive magnetic field, Fig. 4 is a diagram showing an example of a stone basic cell pattern that dominates the detector, and Fig. 115 is a diagram showing an example of the present invention. 0 and lsO relationship diagram showing the basic idea of , 6th wJ is the real l! FIG. 2 is a diagram of a basic cell pattern showing an example of a j10 hypovagina. 1.2... Chevron pattern, S, 4... Shorter, 11, 21... Current path element, 0...
・-Electric [11 direction of the element. Figure 1

Claims (1)

[Claims] Rhinoceros-shaped magnetic bubble detection using am birth cage effect @II
c, a basic cell pattern with basic-Ig bulk is formed by a chevron pattern and a shortper, and the detector current of this chevron pattern flows through the Kametaki Choro element piece 07.
Set the three directions so that they are in the leap of the Neume phase of the Tsumugi rotating magnetic field system**rc, and use a nine-magnetic bubble detector.