JPH09105600A - Power source for fuse - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify the mechanism of a power source for a fuse, lower a cost and facilitate storage and management by providing a plurality of coils arranged in the periphery of a magnet in a case provided in a spinning and flying fuse. SOLUTION: A revolving bullet 1 comprises a tube part 2 filled with an explosive and a fuse 3. When the revolving bullet 1 is shot, the revolving bullet 1 spins at an angular velocity and flies toward a direction shown by an arrow A. This angular velocity ω is accelerated up to 10000rpm during about 10msec immediately after shooting. During this acceleration, a main body case 5 and coils 141 and 145 rotates about a central axis G at the angular velocity ω. On the other hand, a magnet 11 is rotatably supported by bearings 6 and 7, it maintains its stationary state depending on law of inertia. That is, the coils 141 and 145 rotate about the magnet 11. As a result, the coils 141 and 145 induce an induced electromotive force. Thus, a power source 4 for a fuse built in the fuse 3 generates electric power.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fuze power source used as a power source for a fuze.

[0002]

2. Description of the Related Art A fuze such as a proximity fuze requires a firing unit having an electric detonator for igniting an explosive charge and a power supply for operating an electronic circuit for transmitting or detecting radio waves to obtain a proximity signal. As the power source, a power source that satisfies the following requirements is preferable. (1) Maintenance work such as charging is unnecessary even for long-term storage. (2) Energy must not be generated before it is fired, but it can be automatically detected that it has been fired and energy can be generated in a short time. (3) Small size and light weight. As a power source that substantially satisfies the above requirements, a wind turbine generator, a liquid injection battery, a thermal battery, or the like is used.

[0003]

The wind turbine generator described above, however, has a drawback that the manufacturing cost is high because it has a complicated mechanism for ensuring reliability. Further, in the above-mentioned liquid injection battery, thermal battery, etc.,
In addition to the above-mentioned drawbacks, there is a drawback that storage and management are very troublesome because chemical substances are used.

In view of the above circumstances, it is an object of the present invention to provide a fuze power source having a simple mechanism, low cost, and easy storage / management.

[0005]

According to a first aspect of the present invention, there is provided a case provided inside a fuze that spins while flying, and the case is such that the center axis of the case and the center axis of the fuze coincide with each other. A shaft member rotatably supported via bearing means, a magnet attached to the shaft member, and a plurality of coils provided in the case and arranged around the magnet. It is characterized by

According to a second aspect of the present invention, in the fuze power source according to the first aspect, there is provided power storage means for storing power induced in the plurality of coils.

According to a third aspect of the present invention, in the fuze power source according to the first or second aspect, a weight adding means attached to the shaft member is provided.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a side view showing the configuration of a rotary ammunition equipped with a fuze having a built-in fuze power source according to an embodiment of the present invention. In this figure,
Is composed of a tube portion 2 filled with explosive and a fuze 3. The turning bullet 1 is spun at the time of launch and flies while spinning at an angular velocity ω with the central axis G as an axis.
Reference numeral 4 denotes a fuze power source built in the fuze 3, and a turning bullet 1
Generates power using the angular velocity ω after the launch of.

FIG. 2 is an enlarged sectional view showing the structure of the fuze power source 4 shown in FIG. In this figure, reference numeral 5 denotes a main body case, which is a cylindrical member 5a, a disk member 5b that closes the upper surface of the cylindrical member 5a, and a member that closes the lower surface of the disk member 5a and has an opening 5d formed substantially in the center. 5c is integrally formed. 6 is a disc member 5b of the body case 5
Is a bearing attached to the lower surface of the. Reference numeral 7 denotes a bearing attached to the opening 5d of the member 5c of the main body case 5. Reference numeral 20 denotes a shaft member, both ends of which are rotatably supported by bearings 6 and 7. The central axis of the shaft member 20 coincides with the central axis G of the rotary bullet 1 (see FIG. 1).

On the shaft member 20, the spacers 8 and
The inertial disk 9, the spacer 10, the magnet 11, and the spacer 12 are attached and fixed. The inertial disk 9 has a constant weight and serves to increase the moment of inertia. The magnet 11 has a substantially columnar shape, and as shown in FIG. 3, one half of the magnet 11 is magnetized as an S pole and the other half is magnetized as an N pole. Eight yokes 13 are provided around the magnet 11.
1 to 13 are provided, and coils 141 to 148 are wound around the yokes 131 to 138, respectively.

Here, FIG. 4 shows an electrical configuration of the fuze power source according to the above-described embodiment. In the figure, each of the coils 141 to 148 has one end grounded and the other end connected to one electrode of the capacitor 16 via rectifying diodes 151 to 158.

Next, the operation of the fuze power source according to the above-described embodiment will be described. In FIG. 1, when the whirling bullet 1 is fired, the whirling bullet 1 spins at an angular velocity ω and flies in a direction indicated by an arrow A in the figure. This angular velocity ω ranges from 0 rpm to 1000 within 10 msec immediately after launch.
Accelerate to 0 rpm.

At the time of acceleration, as shown in FIG. 3, the main body case 5 and the yokes 131 to 138 (coils 141 to
148) rotates about the central axis G at an angular velocity ω.
On the other hand, since the shaft member 20, the inertial disk 9 and the magnet 11 are rotatably supported by the bearings 6 and 7, the stationary state is maintained according to the law of inertia. That is, the coils 141 to 148 rotate around the magnet 11. As a result, since the magnetic flux density of the magnet 11 that links the coils 141 to 148 changes sinusoidally, as shown in FIG.
Induced electromotive forces v1 to v8 are induced in 1 to 148, respectively.
The currents i1 to i2 generated by the induced electromotive forces v1 to v8 are half-wave rectified by the diodes 151 to 158 and flow into the capacitor 16, where electric charges are accumulated in the capacitor 16 to generate an electromotive force V.

The magnet 11 and the like gradually rotate due to the frictional force of the bearings 6 and 7, and 10 to 2 from the firing.
After 0 seconds, the same angular velocity ω as that of the main body case 5 etc.
Rotate with. That is, since there is no difference in rotation between the magnet 11 and the like and the main body case 5, induced electromotive forces v1 to v8 are not induced in the coils 141 to 148, and power generation ends.

The electric charge charged in the capacitor 16 is discharged by a trigger switch (not shown) or the like,
It is supplied to the electronic circuit and the like described above.

[0016]

According to the present invention, it is possible to obtain a fuze power source having a simple mechanism, low cost, and easy storage and management.

[Brief description of the drawings]

FIG. 1 is a side view showing a configuration of a turning bullet 1 equipped with a fuze including a fuze power source according to an embodiment of the present invention.

FIG. 2 is an enlarged cross-sectional view showing the configuration of the fuze power supply 4 shown in FIG.

3 is a cross-sectional view taken along the line A-A ′ shown in FIG.

FIG. 4 is a circuit diagram showing an electrical configuration of a fuze power supply according to an embodiment of the present invention.

[Explanation of symbols]

 1 Rotating bullet 3 Fuze 4 Fuze power supply 5 Main body case 6, 7 Bearing 9 Inertial disk 11 Magnet 141 to 148 Coil 16 Capacitor 20 Shaft member

Claims (3)

[Claims] 1. A case provided inside a fuze that flies while spinning, and rotatably supported by a case via bearing means so that the center axis of the case coincides with the center axis of the fuze. A fuze power supply, comprising: a shaft member; a magnet attached to the shaft member; and a plurality of coils provided in the case and arranged around the magnet. 2. The fuze power supply according to claim 1, further comprising: a power storage unit that stores power induced in the plurality of coils. 3. The fuze power source according to claim 1, further comprising a weight adding unit attached to the shaft member.