초록 ▼

The present invention relates to a device for electronically arming and firing a MEMS-scale interrupted explosive train to detonate a main charge explosive. The device includes a MEMS slider assembly housing a transfer charge electrically actuated to move between safe and armed positions of the expl

The present invention relates to a device for electronically arming and firing a MEMS-scale interrupted explosive train to detonate a main charge explosive. The device includes a MEMS slider assembly housing a transfer charge electrically actuated to move between safe and armed positions of the explosive train.

대표청구항 ▼

What is claimed is: 1. A MEMS type safe arm device for microdetonation comprising: a circuit board (305) having a slider inductor ( 312), at least one lockpin inductor (310) and at least one alignment pin (395) mounted thereon; an initiator charge plate (320) positioned above and aligned with said

What is claimed is: 1. A MEMS type safe arm device for microdetonation comprising: a circuit board (305) having a slider inductor ( 312), at least one lockpin inductor (310) and at least one alignment pin (395) mounted thereon; an initiator charge plate (320) positioned above and aligned with said circuit board (305) via at least one alignment hole (270), said initiator charge plate (320) having a bridgewire (322) and an initiator charge (324), said bridgewire (322) being adjacent to said initiator charge ( 324), said bridgewire (322), when activated, providing a sufficient temperature rise to detonate said initiator charge(324); an input charge plate (330) positioned above and aligned with said initiator charge plate (320) via said at least one alignment hole (270), said input charge plate (330) having an input charge (110); a transfer charge assembly (200) positioned above and aligned with said input charge plate (330) via said at least one alignment hole (270), said transfer charge assembly (200) having a safe position and an armed position, said safe position and said armed position of said transfer charge assembly (200) being activated in response to the application of an electric signal to said transfer charge assembly (200), said transfer charge assembly (200) having a MEMS safety structure (210), said transfer charge assembly (200) having a slider (230) operatively coupled to said MEMS safety structure (210) by a slider spring (250), said slider ( 230) having an elongated axis (290), said slider (230) having a transfer charge cavity (226) housing a transfer charge (120), said slider (230) having a slider magnet cavity ( 220) housing a slider magnet (360), said slider (230) having a set of safe indentations (235) and a set of armed indentations (236), said slider (230) being operatively dimensioned and configured to slide along said elongated axis (290) responsive to the operation of said slider inductor (312), said MEMS safety structure (210) having at least one lockpin (240), each said lockpin (240) being operably connected to said MEMS safety structure (210) by a lockpin spring (260), each said lockpin (240) having a lockpin magnet cavity (220) housing a lockpin magnet (360), each said lockpin (240) being operatively dimensioned and configured to move in and out of said safe indentations (235) and said armed indentations (236) responsive to the operation of said lockpin inductor (310); an output charge plate (350) positioned above and aligned with said transfer charge assembly (200) via said at least one alignment hole (270), said output charge plate (350) having an output charge (130), wherein said input charge ( 110) and said output charge (130) are located apart from one another along a charge axis (140) perpendicular to said elongated axis (290) of said slider (230); wherein, in the safe position, said lockpin (240) rests within said set of safe indentations (235), said slider ( 230) being located so that said transfer charge (120) is apart from and non-aligned with said charge axis (140) between said input charge (110) and said output charge (130); and, wherein, in the armed position, said lockpin inductor ( 310) affects the movement of said lockpin (240) to retract from said set of safe indentations (235), said slider inductor ( 312) affects the movement of said slider (230) along said elongated axis (290) of said slider (230) aligning said transfer charge (120) with said charge axis (140) and locating said input charge (110) and said output charge (130 ), so that upon the detonation of said initiator charge (324) said input charge (110) detonates, and said transfer charge (120) carries a detonation wave across to said output charge (130), thereby detonating said output charge (130). 2. The device of claim 1 wherein said transfer charge assembly (200) is covered with a sealing plate (340) to protect and environmentally seal said transfer charge assembly (200 ). 3. The device of claim 1 wherein said input charge (110 ) comprises a pressing of a plurality of layers of explosive. 4. The device of claim 1 wherein said input charge (110 ) comprises less than about 1 milligram of sensitive primary explosive material. 5. The device of claim 1 wherein said transfer charge ( 120) comprises a secondary explosive capable of small diameter initiation. 6. The device of claim 1 wherein said transfer charge ( 120) comprises CL-20 with a binder. 7. The device of claim 1 wherein said transfer charge ( 120) comprises a primary explosive. 8. The device of claim 1 wherein said transfer charge ( 120) is housed in a sleeve to increase confinement thereby increasing explosive output power. 9. The device of claim 1 wherein said transfer charge ( 120) comprises a castable explosive material cast directly into said transfer charge cavity (226). 10. The device of claim 1 wherein said output charge ( 130) comprises a secondary explosive. 11. The device of claim 1 wherein said MEMS safety structure (210) is a precision-electroformed dual-thickness part. 12. The device of claim 1 wherein the correct installation of said lockpin magnet (360) and said slider magnet (370) is ensured by means of a geometric feature that is common to both said magnets and said lockpin magnet cavity (220) and said slider magnet cavity (225). 13. The device of claim 1 wherein said MEMS safety structure (210) is a multi-thickness element constructed of a metal material that is more shock-resistant than brittle silicon materials. 14. The device of claim 1 wherein said MEMS safety structure (210) includes a simple mechanical latch or pin that permanently locks said slider (230) in its armed position. 15. The device of claim 1 wherein the attractive force between said slider magnet (370) or lockpin magnet (360) and the respective said slider inductor (312) or said lockpin inductor (310) exceeds the respective said slider spring ( 250) or said lockpin spring (260) return force, thereby allowing said device to remain in its armed position. 16. The device of claim 1 wherein said slider spring ( 250) or said lockpin spring (260) return force exceeds the attractive force between said slider magnet (370) or lockpin magnet (360) and the respective said slider inductor (312) or lockpin inductor (310) when de-energized, thereby allowing said device to return to its safe position.