JP2006352608A - Electric pulse generator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem that an electric pulse generator uses the composite magnetic wire in the prior art, and if an electric pulse generator using the composite magnetic wire is realizable with a simple constitution, using two or more magnets for applying a magnetic field on the composite magnetic wire which needs to reverse the magnetic field, the range of application can be expanded to contactless switches, encoders, etc. <P>SOLUTION: The electric pulse generator having a coiled magnetic wire capable of causing the large Barkhousen jump comprises at least one magnet or electromagnet as a magnetic field generating means. It gives the magnetic field locally to the magnetic wire to change the intensity or the direction of the magnetic field, thereby generating electric pulses. Thus, an electric pulse generator having a simple and widely applicable structure is realizable. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an electric pulse generator using a large Barkhausen jump.

Obtaining electric pulses according to the moving position and moving speed of moving objects or generating electric pulse signals according to various operations is in various fields such as automatic control and electric and electronic equipment. is needed. Conventionally, as an means for generating this kind of electric pulse, various types such as an optical type or a magnetic type have been developed and used as an encoder. One of them is an electric pulse generation using a large Barkhausen jump. There is a device.
This electric pulse generator is composed of a magnetic wire, a magnet, an electric coil, etc., and changes the magnetic flux density in the magnetic material having magnetic anisotropy by moving or replacing the magnetic field generating means such as a magnet. Due to this change, a voltage is generated by an electromagnetic induction action in an electric coil that is in proximity, and this voltage is used as a pulse signal.

One type of electrical switch is a reed switch that is provided with a movable part made of a magnetic material and is made up of contacts that are linked to the movable part, and that performs an on-off operation by applying a magnetic field from the outside. To compensate for the drawbacks related to contacts such as the chattering operation of the electric switch, the electric pulse generator using the large Barkhausen jump in the field to which the present invention belongs does not require a power source and does not output a pulse signal. It is useful as a contact switch.

A magnetic wire capable of causing a large Barkhausen jump will be described as background art of the present invention. A ferromagnetic wire drawn into a thin wire has unique magnetic properties along with its alloy composition. When twisting stress is applied to the wire, the wire is twisted more in the vicinity of the outer peripheral portion of the wire and less twisted in the central portion, so that the magnetic characteristics are different between the outer peripheral portion and the central portion. When processing is performed to leave this state, a ferromagnetic magnetic wire having different magnetic characteristics between the outer peripheral portion and the central portion can be obtained.

The magnetic properties of the outer periphery of the magnetic wire change its magnetization direction with a relatively small magnetic field. On the other hand, the magnetization direction of the central portion is changed by a magnetic field larger than that of the outer peripheral portion. That is, a composite magnetic body having two different magnetic properties, that is, an outer peripheral portion having a magnetic property that is relatively easily magnetized and a central portion that is difficult to be magnetized, is formed in one magnetic wire. Here, the outer peripheral portion is called a soft layer, the central portion is called a hard layer, and such a magnetic wire is called a composite magnetic wire.

Initially, the direction in which the hard layer and the soft layer of the composite magnetic wire are magnetized is not determined, and is in a discrete magnetization state. When an external magnetic field sufficient to reverse the magnetization direction of the hard layer is applied in parallel to the longitudinal direction of the composite magnetic wire, that is, the axial direction, the soft layer is naturally magnetized so that the hard layer has the same magnetization direction. That's right. Next, an external magnetic field that can magnetize only the soft layer is applied in the opposite direction. As a result, a magnetized state in which the magnetized direction is reversed between the soft layer and the hard layer of the composite magnetic wire. Even if the external magnetic field is removed in this state, the magnetization direction of the soft layer is suppressed by the magnetization of the hard layer, and the magnetization state is stable. The external magnetic field at this time is called a set magnetic field.

Next, an external magnetic field opposite to the set magnetic field is applied to increase the external magnetic field. When the strength of the external magnetic field exceeds a certain critical strength, the magnetization direction of the soft layer is rapidly reversed. This magnetic field is called a critical magnetic field. In the reversal phenomenon at this time, the domain wall of the soft layer moves in a state where an avalanche is depressed, and magnetization reversal occurs instantly. As a result, the magnetization directions of the soft layer and the hard layer become the same, and the initial state is restored. The external magnetic field applies a magnetic field larger than the critical magnetic field. This magnetic field is called a reset magnetic field. The phenomenon that the magnetization state is reversed so as to pass through this avalanche is called a large Barkhausen jump. The rate of magnetization reversal depends only on this large Barkhausen jump and is independent of the external magnetic field.

In the prior art, in order to generate the above-mentioned large Barkhausen jump, the principle of operation is to generate an electric pulse by alternately bringing two or more magnets in a state of reversing magnetic poles in close proximity to a magnetic wire. I was trying.

The electric pulse generator according to this operating principle uses a composite magnetic wire as a magnetic sensing element, and magnetizes the first magnetic field generating source that magnetizes the whole in the positive direction and a relatively soft part of the magnetic sensing element in the negative direction. The second magnetic field generation source is necessary, and the detection coil is installed and fixed in the vicinity of the magnetic sensing element, and the second magnetic field generation source is brought close to the first magnetic field generation source. A large Barkhausen jump is caused in a composite magnetic wire to generate a pulse voltage in the detection coil.

  As an example of this type of electric pulse generator, a pulse signal generator disclosed in Japanese Patent Publication No. 52-13705 has been proposed. This pulse signal generator has a magnetosensitive element made of a ferromagnetic material that can cause a large Barkhausen jump, a first magnetic field generating source that magnetizes the whole in a positive direction, and a relatively soft portion of the magnetosensitive element. A second magnetic field generation source for magnetizing in the direction and a detection coil disposed in the vicinity of the magnetic sensing element. The magnetic sensing element and the detection coil are fixed and magnetized by the first magnetic field generation source. The magnetic field generation source is combined as a movable body so that magnetization in the direction opposite to that of the first magnetic field generation source is performed by the second magnetic field generation source, and a predetermined change is caused to the magnetosensitive element by rotation of the movable body, A pulse voltage is generated in the detection coil. This conventional example is an example in which a magnetic field generating source is arranged so that a magnetic field is applied to the entire wire and the magnetic field of the entire wire is alternated.

Another example of an electric pulse generator for this method is disclosed in Japanese Patent Publication No. 64-8929. This electric pulse generator magnetizes a magnetosensitive element that can cause a large Barkhausen jump, a first magnetic field generating source that magnetizes the whole in a positive direction, and a relatively soft portion of the magnetosensitive element in a negative direction. The second magnetic field generation source and the detection coil arranged in the vicinity of the magnetic sensing element are fixed, and the movable side is capable of intermittently diminishing the magnetization action on the magnetic sensing element of the first magnetic field generation source with respect to the fixed side. The body is combined, and a predetermined change is caused in the magnetosensitive element by the behavior of the movable body so that a pulse voltage is generated in the detection coil. This conventional example is an example in which a movable body made of a magnetic body is arranged so that the magnetic field applied to the entire wire fluctuates.

These conventional electric pulse generators can be used in place of conventional electromagnetic pickups and Hall effect sensors because they can be powered off and are excellent in that they are not easily affected by external magnetic fields. Is.

Japanese Patent Publication No.52-13705 Japanese Patent Publication No. 64-8929

  In order to obtain a pulse signal using a large Barkhausen jump by applying a magnetic bias to the magnetic wire, the first magnetic field generation source is used as the magnetic bias to be applied to the composite magnetic wire as the magnetic sensitive element. And a magnetic field corresponding to the second magnetic field generation source is required.

FIG. 13 shows an operation principle diagram of a conventional example. As shown in FIG. 13, at least two or more magnets are arranged in parallel to the direction of the center line of the composite magnetic wire so that the directions of the N pole and the S pole are alternately switched. Rotating motion is applied so that an alternating magnetic field can be applied to the composite magnetic wire. However, with this structure,
The electric pulse generator has a complicated structure and a large shape. For this reason, it is difficult to incorporate it into a small electronic device. Furthermore, since at least two magnets are used, it is necessary to suppress variation in magnetization between magnets and to ensure assembly accuracy, and are inexpensive. It was difficult to provide the product.

The electric pulse generator proposed in Patent Document 2 also has the following problems. That is, a movable body provided with a slit in the magnetic body is necessary. This movable body cannot be made smaller than the magnets or the magnetosensitive elements as the first magnetic field generation source and the second magnetic field generation source. Furthermore, the movable body, the magnet, and the magnetosensitive element have a complicated structure in which they must move while being parallel to each other. Therefore, it has been difficult to make it small and inexpensive so that it can be incorporated into an electronic device.

An object of the present invention is to provide an electric pulse generator having a simple structure and sufficient performance and applicable in a wider range of fields.

The electric pulse generator according to the present invention is a device having a simple structure having a composite magnetic wire capable of causing a large Barkhausen jump, a detection coil wound around the composite magnetic wire, and one magnetic field generating means. is there.

Conventionally, in order to induce a large Barkhausen jump, it was necessary to apply a magnetic field to almost the entire center of the composite magnetic wire. However, we found a phenomenon that seems to be a large Barkhausen jump just by applying a magnetic field locally to the composite magnetic wire. The operating principle is thought to be due to the large Barkhausen jump described above, but detailed theoretical clarification is awaited in the future.

By applying a magnetic field generated from one magnetic field generating means to a local part of the magnetic wire to a composite magnetic wire that can cause a large Barkhausen jump, and changing the magnetic field strength or the direction of the magnetic field of the magnetic field generating means. An electrical pulse can be generated. It is an object of the present invention to provide an electric pulse generator utilizing this phenomenon.

As a typical example of moving the magnetic field generating means, the center of the composite magnetic wire is formed on the side surface of the composite magnetic wire that is approximately 1/4 of the length of the composite magnetic wire with respect to the magnetic wire that can cause a large Barkhausen jump. When the N pole of the magnetic field generating means is brought close to the line perpendicularly to the line and moved in a direction orthogonal to the center line of the magnetic wire and the straight line connecting the N pole and S pole of the magnetic field generating means, An electric pulse can be generated by appropriately selecting the distance between the generating means and the magnetic wire, the size of the magnetic field generating means, the strength of the generated magnetic field, and the like.

The part where the magnetic field generating means is applied and the magnetic field is applied is not limited to the above example, and an electric pulse can be generated as long as it is a partial side surface of the magnetic wire. However, near the center of the magnetic wire in the length direction or near the end of the magnetic wire, the electric pulse output is small and unstable, which is not practical. Therefore, it is desirable to apply a magnetic field to the portion to which the magnetic field is applied except for the vicinity of the center in the length direction and the end.

According to the present invention, if there is one magnetic field generating means for one magnetic wire, an output is generated. Therefore, the magnetic field strength of a plurality of magnetic field generating means, which has been difficult to achieve conventionally, is made uniform and the mounting accuracy is improved. Thus, it is possible to provide a small and inexpensive electric pulse generator.

Furthermore, the electric pulse generator according to the present invention is a non-power source switch for generating an electric pulse signal in order to achieve sufficient performance with a simple configuration as compared with a conventional electric pulse generator using a large Barkhausen jump. It has become possible to provide electrical pulse generators that can be used in a wide range of applications such as encoders and encoders.

Compared to the case where a plurality of magnetic field generating means are required in the conventional example, the magnetic field generating means is locally brought close to a part of the magnetic wire as one permanent magnet or one electromagnet, The structure which magnetizes a part of magnetic wire is taken. A description will be given below in accordance with examples.

In the embodiment, the direction of the center line of the composite magnetic wire is described as the X direction, and the directions perpendicular to the direction of the center line of the composite magnetic wire are described as the Y direction and the Z direction, respectively.

Example 1 is shown in FIG. 1 includes a composite magnetic wire 1, a detection coil 2 wound around the composite magnetic wire 1, and a magnetic field generating means for generating a magnetic field capable of magnetizing a part of the composite magnetic wire 1. The cuboid permanent magnet 3 is provided. The permanent magnet 3 is placed close to the composite magnetic wire 1 so as to magnetize the composite magnetic wire 1 from the side surface of the composite magnetic wire 1 without contacting the composite magnetic wire 1 at an appropriate distance from the center line position in the longitudinal direction of the composite magnetic wire 1. Has been. The permanent magnet 3 is magnetized in a direction (Z direction) perpendicular to the center line of the composite magnetic wire 1. In the example of FIG. 1, the direction close to the composite magnetic wire 1 is an N pole. The same effect can be obtained even if the direction approaching the magnetic wire 1 is the south pole.

In FIG. 1, when the permanent magnet 3 reciprocates in the Y direction, one electrical pulse is generated at each position where the end of the permanent magnet 3 in the Y direction and the composite magnetic wire are closest to each other. Therefore, positive and negative electric pulses can be generated at intervals corresponding to the moving speed of the magnet and the width of the magnet.

Specifically, an operation example of the electric pulse generator having such a configuration will be described. In FIG. 1, a bicalloy wire having a diameter of 250 μm and a length of 22 mm is used as the composite magnetic wire 1, and a detection coil 2 of 3000 turns is wound around a central portion of 10 mm. The permanent magnet 3 has a width of 5 mm in the Y direction, a width of 6 mm in the X direction, and a thickness of 2.5 mm in the Z direction, and is magnetized to a magnetic field strength of 350 mT.

The permanent magnet is arranged so that it can move in the Y direction with a distance of 1 mm in the Z direction so as not to contact the wire, and the position of the center of the permanent magnet in the X direction is 8. It moves in the Y direction in agreement with the 3 mm position. When the permanent magnet moves relative to the composite magnetic wire, an electric pulse is generated in the detection coil wound around the composite magnetic wire 1. When the permanent magnet 3 moves in the Y direction of the first embodiment, one electrical pulse is generated at each position where the end of the permanent magnet 3 in the Y direction and the composite magnetic wire are closest to each other. That is, one positive and one negative pulse is generated that does not depend on the moving speed of the permanent magnet 3. FIG. 7 illustrates an electrical pulse of Example 1. In the electric pulse generator having the structure as in the first embodiment, the magnitudes of the two positive and negative electric pulses are different.

In the first embodiment, when the directions of the N pole and the S pole are reversed by the magnetization of the permanent magnet 3, the electrical pulse generated in the detection coil is an electrical pulse with the polarity reversed and the output obtained by inverting FIG. It becomes a pulse.

Example 2 is shown in FIG. FIG. 2 schematically shows the configuration of the electric pulse generator of this embodiment. The basic configuration of the electric pulse generator of FIG. 2 is the same as that of FIG. 1, and each element constituting the electric pulse generator can be described as being the same as FIG.

In the second embodiment, the permanent magnet 3 moves in parallel with the center line of the composite magnetic wire 1.

The operation of the electric pulse generator having such a configuration will be described. In FIG. 2, when the permanent magnet 3 moves in the X direction with respect to the composite magnetic wire 1, an electric pulse signal is generated in the detection coil 2 wound around the composite magnetic wire 1. When the permanent magnet 3 moves in the X direction of the second embodiment, one electrical pulse is generated at each position where the end of the permanent magnet 3 in the X direction and the end of the composite magnetic wire are closest to each other. Therefore, electric pulses can be generated at intervals corresponding to the moving speed of the magnet and the width of the magnet.

Specifically, an operation example of the electric pulse generator having such a configuration will be described. The size and performance of each element are the same as in Example 1.

The permanent magnet is arranged so that it can move in the X direction with a distance of 9.5 mm in the Z direction so as not to contact the wire, and the position of the permanent magnet center in the X direction is along the center line of the composite magnetic wire 1. Moving. In the second embodiment, when the permanent magnet 3 moves in the X direction, one electrical pulse is generated at each position where the end of the permanent magnet 3 in the X direction and the end of the composite magnetic wire are closest to each other. That is, one positive and one negative pulse is generated that does not depend on the moving speed of the magnet. FIG. 8 illustrates the electric pulses generated. In the electric pulse generator having the structure as in the second embodiment, the magnitudes of the two positive and negative electric pulses are different.

In the second embodiment, when the directions of the N pole and the S pole are reversed by the magnetization of the permanent magnet 3, an electric pulse generated in the detection coil is a pulse signal whose polarity is reversed and an output obtained by inverting FIG. It becomes a pulse.

Example 3 is shown in FIG. FIG. 3 schematically shows the configuration of the electric pulse generator of this embodiment. The elements and arrangement of Example 3 are the same as in Example 1, but in Example 1, the magnetization direction of the permanent magnet 3 is the Z direction, whereas in Example 3, the magnetization direction of the permanent magnet is Y. Direction.

Next, the operation of the electric pulse generator having such a configuration will be described. In FIG. 3, when the permanent magnet 3 moves in the Y direction with respect to the composite magnetic wire 1, an electric pulse is generated in the detection coil 2 wound around the composite magnetic wire 1. When the permanent magnet 3 moves in the Y direction according to the third embodiment, one electric pulse is provided at each end of the permanent magnet 3 in the Y direction, that is, at the position where the side surfaces of the north and south poles are closest to the composite magnetic wire. Will occur. Therefore, electric pulses are generated at intervals corresponding to the moving speed of the magnet and the width of the magnet.

An operation example of the electric pulse generator having such a configuration will be described. In FIG. 3, the same composite magnetic wire 1 and detection coil 2 as those in Example 1 were used. The permanent magnet 3 has a width of 2.5 mm in the Y direction, a width of 6 mm in the X direction, and a thickness of 5 mm in the Z direction, and is magnetized to a magnetic field strength of 350 mT.

The permanent magnet is installed so as to be movable in the Y direction at a distance of 1 mm in the Z direction so as not to contact the wire, and the position of the permanent magnet center in the X direction is 3 mm from one end of the composite magnetic wire 1. Move according to the position. When the permanent magnet moves relative to the composite magnetic wire, an electric pulse signal is generated in the detection coil wound around the composite magnetic wire 1. When the permanent magnet 3 moves in the Y direction of the third embodiment, one positive and one negative electrode is provided at the position where the end of the permanent magnet 3 in the Y direction, that is, the side of the magnetic pole N and the magnetic pole S and the composite magnetic wire are closest to each other. An electrical pulse is generated. That is, one positive and one negative pulse is generated that does not depend on the moving speed of the magnet.

Example 4 is shown in FIG. FIG. 4 schematically shows the configuration of the electric pulse generator of this embodiment. The electric pulse generator shown in FIG. 4 is arranged along the composite magnetic wire 1, the detection coil 2 wound around the composite magnetic wire 1, and the vicinity of the composite magnetic wire 1, and magnetizes the composite magnetic wire 1. A disk-shaped permanent magnet 33 is provided as a magnetic field generating means for generating a possible magnetic field.

In the fourth embodiment, the disk-shaped permanent magnet 33 having the center of rotation parallel to the center line of the composite magnetic wire 1 has an appropriate distance from the center line position in the length direction of the composite magnetic wire 1. It is installed so as to be able to rotate without being in contact with it. The outer periphery of the disk-shaped permanent magnet 33 is magnetized with N and S poles in a direction perpendicular to the center line of the composite magnetic wire 1 (Y or Z direction). In the fourth embodiment, a single-pole magnetized disk-shaped permanent magnet is used. However, the same effect can be obtained with a multi-pole magnetized permanent magnet such as a magnetic drum.
Further, in Example 4, a single-pole magnetized disk-shaped permanent magnet is used, but the effect is the same with a rod-shaped permanent magnet.

In FIG. 4, a bicalloy wire having a diameter of 250 μm and a length of 22 mm is used as the composite magnetic wire 1, and a detection coil 2 having 3000 turns is wound around a central portion of 10 mm. The disk-shaped permanent magnet 33 is a disk having a diameter of 10 mm and a width of 3 mm in the X direction, and N and S poles having a magnetic field strength of 30 mT are alternately magnetized on the surface.

The outer periphery of the disk-shaped permanent magnet 33 is placed 1 mm away from the composite magnetic wire 1 and is arranged so as not to contact. When the disk-shaped permanent magnet rotates, an electric pulse signal is generated in the detection coil wound around the composite magnetic wire 1. A positive or negative electric pulse is generated at a specific position close to the composite magnetic wire by switching the N pole and S pole of the disk-shaped permanent magnet 33. That is, a positive or negative pulse corresponding to the rotation speed and the magnetic pole independent of the moving speed of the magnet is generated. FIG. 10 illustrates the electric pulses generated. In the electric pulse generator having the structure as in the fourth embodiment, the magnitudes of the two positive and negative electric pulses are substantially equal.

FIG. 5 shows a fifth embodiment. FIG. 5 schematically shows the configuration of the electric pulse generator of this embodiment. The configuration of the electric pulse generator of FIG. 5 is basically the same as that of the fourth embodiment.

In the fifth embodiment, the disk-shaped permanent magnet 33 having the center of rotation in the direction perpendicular to the center line of the composite magnetic wire 1 has an appropriate distance from the center line position in the length direction of the composite magnetic wire 1. It is installed so as to be able to rotate in a state close to 1 but not in contact. The outer peripheral portion of the disk-shaped permanent magnet 33 is magnetized with N and S poles in a direction perpendicular to the center line of the composite magnetic wire 1 (X or Z direction). In the fourth embodiment, a single-pole magnetized disk-shaped permanent magnet is used. However, the same effect can be obtained with a multi-pole magnetized permanent magnet such as a magnetic drum.
In Example 5, a single pole magnetized disk-shaped permanent magnet is used, but the effect is the same with a rod-shaped permanent magnet.

In FIG. 5, the composite magnetic wire 1, the detection coil 2, and the disk-shaped permanent magnet 33 have the same specifications as in the fourth embodiment.

The outer periphery of the disk-shaped permanent magnet 33 is placed 3 mm away from the composite magnetic wire 1 and is arranged so as not to contact. When the disk-shaped permanent magnet rotates, an electric pulse signal is generated in the detection coil wound around the composite magnetic wire 1. A positive or negative electric pulse is generated at a specific position close to the composite magnetic wire by switching the N pole and S pole of the disk-shaped permanent magnet 33. That is, a pulse corresponding to the number of rotations and the magnetic pole is generated regardless of the moving speed of the magnet. FIG. 11 illustrates the electric pulses generated. In the electric pulse generator having the structure as in the fifth embodiment, the magnitudes of the two positive and negative electric pulses are substantially equal.

A sixth embodiment is shown in FIG. FIG. 6 schematically shows the configuration of the electric pulse generator. The electric pulse generator of this embodiment has the same configuration as that of the embodiment shown in FIG. 1 except for the configuration of the magnetic field generating means. Here, only the configuration of the magnetic field generating means will be described. The magnetic field generating means is an electromagnet 34 and is disposed at a suitable distance from the center line position in the length direction of the composite magnetic wire 1 without contacting the composite magnetic wire 1.

In FIG. 6, a bicalloy wire having a diameter of 250 μm and a length of 22 mm is used as the composite magnetic wire 1, and a detection coil 2 having 3000 turns is wound around a central portion of 10 mm. The electromagnet 34 is formed by winding a coil of 10,000 turns around a central portion 25 mm of a cylindrical ferrite core having a diameter of 3 mm and a length in the Z direction of 35 mm. The center line of the electromagnet 34 is from one end of the composite magnetic wire 1. It is perpendicular to the center line of the composite magnetic wire 1 3 mm inward in the X direction, and the tip is set 2 mm away from the composite magnetic wire in the Z direction. When 50 cycles of alternating current was passed through the electromagnet 34, the pulse signal of FIG. 12 was obtained from the detection coil. As shown in FIG. 12, positive and negative voltage pulses are generated when a specific magnetic field of alternating magnetic fields is applied by the current passed through the electromagnet.

The electric pulse generator of the present invention can be applied to a switch for electric pulse output with no power supply and an encoder for outputting various position changes as electric pulse signals with a very simple configuration.

  Conventionally, an electric pulse generator for a composite magnetic wire, which has not been sufficiently put into practical use due to the complicated configuration used to change the magnetic bias, can be realized with a very simple configuration. In addition, a pulse output switch and various encoders can be easily realized.

It is a block diagram which shows the 1st Example of the electric pulse generator of this invention. It is a block diagram which shows the 2nd Example of the electric pulse generator of this invention. It is a block diagram which shows the 3rd Example of the electric pulse generator of this invention. It is a block diagram which shows the 4th Example of the electric pulse generator of this invention. It is a block diagram which shows the 5th Example of the electric pulse generator of this invention. It is a figure which shows the 6th Example of the electric pulse generator of this invention. It is a figure which shows the output of the 1st Example of the electric pulse generator of this invention. It is a figure which shows the output of the 2nd Example of the pulse generator of this invention. It is a figure which shows the output of the 3rd Example of the electric pulse generator of this invention. It is a figure which shows the output of the 4th Example of the electric pulse generator of this invention. It is a figure which shows the output of the 5th Example of the electric pulse generator of this invention. It is a figure which shows the output of the 6th Example of the electric pulse generator of this invention. It is a block diagram which shows the operation principle of the prior art example of an electric pulse generator.

Explanation of symbols

1 Composite magnetic wire
2 Detection coil
3 Permanent magnet
33 disk-shaped permanent magnet
34 Electromagnet

Claims (4)

An electric pulse generator comprising at least one or more magnetic field generating means for winding a coil around a magnetic wire capable of causing a large Barkhausen jump and inducing a large Barkhausen jump. An electric pulse generator characterized in that a magnetic field generated from a magnetic field generator is locally applied. 2. The electric pulse generator according to claim 1, wherein the magnetic field generating means includes at least one permanent magnet and moves the permanent magnet relative to the magnetic wire. The electric pulse generator according to claim 1, wherein the permanent magnet is a permanent magnet magnetized by multipolar surfaces. 2. The electric pulse generating device according to claim 1, wherein the magnetic field generating means includes at least one electromagnet and generates an electric pulse by an alternating magnetic field generated from the electromagnet.