USH1441H - HPM hardened mine - Google Patents
HPM hardened mine Download PDFInfo
- Publication number
- USH1441H USH1441H US08/334,838 US33483894A USH1441H US H1441 H USH1441 H US H1441H US 33483894 A US33483894 A US 33483894A US H1441 H USH1441 H US H1441H
- Authority
- US
- United States
- Prior art keywords
- metal package
- transducer
- pair
- detonation
- disposed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
- F42C13/00—Proximity fuzes; Fuzes for remote detonation
- F42C13/08—Proximity fuzes; Fuzes for remote detonation operated by variations in magnetic field
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
- F42C11/00—Electric fuzes
- F42C11/001—Electric circuits for fuzes characterised by the ammunition class or type
- F42C11/007—Electric circuits for fuzes characterised by the ammunition class or type for land mines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
- F42C13/00—Proximity fuzes; Fuzes for remote detonation
- F42C13/06—Proximity fuzes; Fuzes for remote detonation operated by sound waves
Definitions
- This invention relates to the field of anti-personnel devices and, in particular, to high power microwave protected mines.
- HPM high power microwave
- One object of the present invention is provide for a means to harden anti-personnel devices against high power microwave energy.
- Another object of the present invention is to provide for such a anti-personnel device, but which may be made in a cost effective manner.
- Still another object of the present invention is to provide for an anti-personnel device which may be safely installed and activated.
- a detonation charge and its appropriate detonation circuitry within a housing that is impervious to high power microwave energy.
- the power source and the detonation signal are then connected to the detonation circuitry via two sets of input and output piezoelectric transducers which convert an electrical signal to an acoustic one, on the input end, and then convert the acoustic signal back to an electrical signal, on the output end.
- FIGURE is a cross-section view of the preferred embodiment of the present invention.
- HPM high-power-microwave
- Sensor signals and power supply are brought through the metal package as acoustic waves using piezoelectric transducers 2a and 2b and 10a and 10b, respectively, one of each pair being mounted externally and the other being mounted internally to the metal package 1.
- the sensor 3 can sense pressure, magnetic anomaly, acoustic signature, etc in order to send a signal to the detonation circuitry 6.
- a battery 4 is also mounted externally in order to be replaceable, but may be internalized if replacement is not desired.
- the typical explosive charge 5 and detonator circuity 6 are mounted inside the metal package 1.
- an externally mounted d.c. to r.f. converter 7 and internally mounted r.f. to d.c. converter 8 are used.
- the battery connector 9 does not required special shielding.
- the operation of the mine is simple.
- the metal package 1 without penetrations in the metal package 1 isolates the sensitive detonator circuitry 6 and explosive charge 5 from HPM.
- Power is supplied from the battery 4 as d.c. and is converted to r.f. by converter 7.
- the converted r.f. signal is then converted by outer transducer 2b to an acoustic wave, which propagates through the package wall 1 and which is reconverted to r.f. by inner transducer 2a.
- the r.f. signal is then reconverted from r.f. to d.c. by converter 8 and distributed as needed.
- Sensor 3 is a passive r.f. based device whose frequency response changes in a prescribed fashion in response to pressure, magnetic anomaly, etc. This allows the detonator circuity to interrogate the sensor using an r.f. signal which is transduced through the package wall 1 by a second pair of transducers 10a and 10b.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
The invention is a high power microwave hardened mine wherein a detonationharge and its appropriate detonation circuitry are disposed within a housing that is impervious to high power microwave energy. A power source and a sensor that provides the detonation signal are connected to the detonation circuitry via two sets of input and output piezoelectric transducers which convert an electrical signal to an acoustic one, the input, and then convert the acoustic signal back to an electrical signal, the output. By providing for d.c. to r.f. and r.f. to d.c. converters, the power source can be placed externally to the metal package and therefore, the battery can be easily and safely replaced.
Description
The invention described herein may be made, used, sold and/or licensed by, or on behalf of, the United States of America without the payment to me of any royalties thereon.
This invention relates to the field of anti-personnel devices and, in particular, to high power microwave protected mines.
There are a multitude of anti-personnel weapons currently in existence today. One problem with these anti-personnel weapons, including buried mines, is that they are very susceptible to detonation by high power microwave (HPM) energy. Due to this susceptibility, anti-personnel devices may be detonated intentionally or by accident by high power microwave energy sources. Accordingly, the effectiveness of certain mines has been diminished because an enemy can detonate mines in a known mine field or because mines can be detonated inadvertently causing "friendly fire" accidents.
Accordingly, there is a need to make mines hardened to high power microwave energy. The present invention addresses this need.
One object of the present invention is provide for a means to harden anti-personnel devices against high power microwave energy.
Another object of the present invention is to provide for such a anti-personnel device, but which may be made in a cost effective manner.
Still another object of the present invention is to provide for an anti-personnel device which may be safely installed and activated.
These and other objects of the invention are accomplished by providing a detonation charge and its appropriate detonation circuitry within a housing that is impervious to high power microwave energy. The power source and the detonation signal are then connected to the detonation circuitry via two sets of input and output piezoelectric transducers which convert an electrical signal to an acoustic one, on the input end, and then convert the acoustic signal back to an electrical signal, on the output end.
These and other features of the invention will become more apparent in light of the following Detailed Description of the Invention and associated FIGURE wherein:
The FIGURE is a cross-section view of the preferred embodiment of the present invention.
Referring now to the FIGURE there is shown a high-power-microwave (HPM) protected mine which includes a continuous metal package 1 through which HPM signals are attenuated to safe levels. Sensor signals and power supply are brought through the metal package as acoustic waves using piezoelectric transducers 2a and 2b and 10a and 10b, respectively, one of each pair being mounted externally and the other being mounted internally to the metal package 1. The sensor 3 can sense pressure, magnetic anomaly, acoustic signature, etc in order to send a signal to the detonation circuitry 6. A battery 4 is also mounted externally in order to be replaceable, but may be internalized if replacement is not desired. The typical explosive charge 5 and detonator circuity 6 are mounted inside the metal package 1. For an externally mounted battery 4, an externally mounted d.c. to r.f. converter 7 and internally mounted r.f. to d.c. converter 8 are used. The battery connector 9 does not required special shielding.
The operation of the mine is simple. The metal package 1 without penetrations in the metal package 1 isolates the sensitive detonator circuitry 6 and explosive charge 5 from HPM. Power is supplied from the battery 4 as d.c. and is converted to r.f. by converter 7. The converted r.f. signal is then converted by outer transducer 2b to an acoustic wave, which propagates through the package wall 1 and which is reconverted to r.f. by inner transducer 2a. The r.f. signal is then reconverted from r.f. to d.c. by converter 8 and distributed as needed.
This description is of the preferred embodiment. Numerous alternative embodiments can be conceived wherein the HPM sensitive electronics and/or charge are in the shielded compartment, and numerous sensors, actuators, power supply, etc. are external to the shielded compartment and are connected via piezoelectric transducer pairs.
Claims (2)
1. A mine which is hardened against high power microwave energy comprising:
a metal package that is of such dimensions so as to attenuate high power microwave energy;
a pair of piezoelectric transducers mounted on the metal package such that one transducer of the pair is mounted on an inside of the metal package and the other transducer of the pair is mounted on an outside of the metal package;
a sensor means disposed externally to the metal package, the sensor means being electrically connected to the transducer mounted on the outside of the metal package;
detonation circuitry disposed in the metal package, the detonation circuitry being electrically connected to the transducer mounted on the inside of the metal package;
an explosive charge disposed in the metal package and connected to the detonation circuitry; and
a battery disposed in the metal package and connected to the detonation circuitry.
2. A mine which is hardened against high power microwave energy comprising:
a metal package that is of such dimensions so as to attenuate high power microwave energy;
first and second pairs of piezoelectric transducers each pair mounted on the metal package such that one transducer of each pair is mounted on an inside of the metal package and the other transducer of each pair is mounted on an outside of the metal package;
a sensor means disposed externally to the metal package, the sensor means being electrically connected to the transducer of the first pair which is mounted on the outside of the metal package;
detonation circuitry disposed in the metal package, the detonation circuitry being electrically connected to the transducer of the first pair which is mounted on the inside of the metal package;
an explosive charge disposed in the metal package and connected to the detonation circuitry;
a battery disposed outside the metal package;
a d.c. to r.f. converter mounted on the outside of the metal package and connected to the battery and to the transducer of the second pair which is mounted on the outside of the metal package; and
an r.f. to d.c. converter disposed in the metal package and connected to the transducer of the second pair which is mounted on the inside of the metal package and to the detonation circuitry.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/334,838 USH1441H (en) | 1994-11-04 | 1994-11-04 | HPM hardened mine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/334,838 USH1441H (en) | 1994-11-04 | 1994-11-04 | HPM hardened mine |
Publications (1)
Publication Number | Publication Date |
---|---|
USH1441H true USH1441H (en) | 1995-06-06 |
Family
ID=23309074
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US08/334,838 Abandoned USH1441H (en) | 1994-11-04 | 1994-11-04 | HPM hardened mine |
Country Status (1)
Country | Link |
---|---|
US (1) | USH1441H (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5703321A (en) * | 1994-11-08 | 1997-12-30 | Daimler-Benz Aerospace Ag | Device for locating artillery and sniper positions |
-
1994
- 1994-11-04 US US08/334,838 patent/USH1441H/en not_active Abandoned
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5703321A (en) * | 1994-11-08 | 1997-12-30 | Daimler-Benz Aerospace Ag | Device for locating artillery and sniper positions |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
STCF | Information on status: patent grant |
Free format text: PATENTED CASE |