Method for utilizing a MEMS safe arm device for microdetonation
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F42C-015/18
F42C-015/00
출원번호
US-0901395
(2004-07-22)
발명자
/ 주소
Maurer,Walter H.
Soto,Gabriel H.
Hollingsworth,David R.
출원인 / 주소
The United States of America as represented by the Secretary of the Navy
인용정보
피인용 횟수 :
6인용 특허 :
7
초록▼
The present invention relates to a method utilizing a MEMS safe arm 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 saf
The present invention relates to a method utilizing a MEMS safe arm 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 method for utilizing a MEMS safe arm device for microdetonation comprising: providing a safe arm device comprising: a circuit board (305) having a slider inductor ( 312), at least one lockpin inductor (310) and at least one alignment pin (270) mounted thereon; an initiator
What is claimed is: 1. A method for utilizing a MEMS safe arm device for microdetonation comprising: providing a safe arm device comprising: a circuit board (305) having a slider inductor ( 312), at least one lockpin inductor (310) and at least one alignment pin (270) 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); 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 slider 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); operating said lockpin inductor (310) to affect the movement of said lockpin (240) to retract from said set of safe indentations (235), and operating said slider inductor (312) to affect 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) locating said transfer charge ( 130) adjacent to said input charge (110) and said output charge (130), thereby said device being operable in the armed position. 2. The method of claim 1 further comprising: providing means for activating said bridgewire (322), 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) , the detonation of said initiator charge (324) affecting the detonation of said input charge (110), the detonation of said input charge (110) affecting the detonation of said transfer charge (120), said transfer charge (120) carrying a detonation wave across to said output charge (130) affecting the detonation of said output charge (130), said output charge ( 130) detonation thereby affecting the detonation of a main charge (not shown). 3. The method of claim 1, further comprising operating said lockpin inductor (310) to affect the movement of said lockpin (240) into said set of safe indentations (235), and operating said slider inductor (312) to affect the movement of said slider (230) along said elongated axis of said slider (230), 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) thereby causing said device to be operable in the safe position. 4. The method of claim 1, further comprising operating said lockpin inductor (310) to affect the movement of said lockpin (240) into said set of armed indentations (236), operating said slider inductor (312) to affect the movement of said slider (230) along said long axis (290), thereby causing said device to be locked in the armed position. 5. The method 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 ). 6. The method of claim 1 wherein said input charge (110 ) comprises a pressing of a plurality of layers of explosive. 7. The method of claim 1 wherein said input charge (110 ) comprises less than about 1 milligram of sensitive primary explosive material. 8. The method of claim 1 wherein said transfer charge ( 120) comprises a secondary explosive capable of small diameter initiation. 9. The method of claim 1 wherein said transfer charge ( 120) comprises CL-20 with a binder. 10. The method of claim 1 wherein said transfer charge ( 120) comprises a primary explosive. 11. The method of claim 1 wherein said transfer charge ( 120) is housed in a sleeve to increase confinement thereby increasing explosive output power. 12. The method of claim 1 wherein said transfer charge ( 120) comprises a castable explosive material cast directly into said transfer charge cavity (226). 13. The method of claim 1 wherein said output charge ( 130) comprises a secondary explosive. 14. The method of claim 1 wherein said MEMS safety structure (210) is a precision-electroformed dual-thickness part. 15. The method 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). 16. The method 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. 17. The method 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.
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