Arm-fire device and method of igniting propulsion system using the same
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F42C-011/00
F42C-015/24
F42C-011/04
출원번호
US-0490435
(2017-04-18)
등록번호
US-10113847
(2018-10-30)
우선권정보
KR-10-2016-0107036 (2016-08-23)
발명자
/ 주소
Hwang, Jungmin
Jang, Seunggyo
Ryu, Byungtae
출원인 / 주소
AGENCY FOR DEFENSE DEVELOPMENT
대리인 / 주소
Scully Scott Murphy and Presser
인용정보
피인용 횟수 :
0인용 특허 :
11
초록▼
An arm-fire device comprises a capacitor charged by an arming signal; an acceleration switch for generating an operation signal if an acceleration more than a predetermined acceleration is sensed; a controller electrically connected with the capacitor and the acceleration switch, controlling generat
An arm-fire device comprises a capacitor charged by an arming signal; an acceleration switch for generating an operation signal if an acceleration more than a predetermined acceleration is sensed; a controller electrically connected with the capacitor and the acceleration switch, controlling generation of a firing signal; and a through bulkhead initiator provided with an ignition portion installed at a space separated by a bulkhead and configured to be electrically connected with the controller to ignite the ignition portion if the firing signal is transferred thereto, wherein the controller discharges the capacitor to generate the firing signal when the operation signal and a launching signal, which is applied from outside, are all sensed in a state that the capacitor is charged. The arm-fire device is applied to a multi-stage rocket, etc., whereby the probability of accidental ignition may be lowered.
대표청구항▼
1. An arm-fire device comprising: a capacitor charged by an arming signal;an acceleration switch for generating an operation signal if an acceleration more than a predetermined acceleration is sensed;a controller electrically connected with the capacitor and the acceleration switch, controlling gene
1. An arm-fire device comprising: a capacitor charged by an arming signal;an acceleration switch for generating an operation signal if an acceleration more than a predetermined acceleration is sensed;a controller electrically connected with the capacitor and the acceleration switch, controlling generation of a firing signal by discharging the capacitor when the operation signal and an externally-applied launching signal are all sensed in a state that capacitor is charged; anda through bulkhead initiator provided with an ignition portion installed at a space separated by a bulkhead and configured to be electrically connected with the controller to ignite the ignition portion if the firing signal is transferred thereto,wherein the acceleration switch includes:a stator having a first contact point;a proof mass accommodated within the stator and supported by an elastic member to be movable with respect to the stator;a second contact point formed at one side of the proof mass and formed to contact the first contact point if the acceleration more than the predetermined acceleration is applied thereto;a plurality of first electrode plates formed to be protruded from the stator in a direction crossing a moving direction of the proof mass;a plurality of second electrode plates formed to be protruded from the proof mass and thus arranged alternately with the first electrode plates along the moving direction of the proof mass;a base glass coupled to a lower portion of the stator to cover a lower portion of the proof mass; anda cup glass coupled to an upper portion of the stator to cover an upper portion of the proof mass,wherein a protrusion protrudes from the cup glass toward a groove formed at the upper portion of the proof mass to be caught in the groove, such that the cup glass and the base glass restrict a displacement of the proof mass. 2. The arm-fire device according to claim 1, further comprising a housing in which the controller, the capacitor and the acceleration switch are installed, wherein the through bulkhead initiator is installed at one end of the housing to allow the space where the ignition portion is installed to be separated from the inside of the housing by the bulkhead. 3. The arm-fire device according to claim 2, further comprising a connector installed at the other end of the housing, performing at least one of transmission of the launching signal and supply of a power source. 4. The arm-fire device according to claim 1, wherein the acceleration switch further includes an elastic member is configured to connect the proof mass with the stator and apply an elastic force to the proof mass in a direction to space the second contact point apart from the first contact point. 5. The arm-fire device according to claim 1, wherein the acceleration switch further includes a power source portion for applying a voltage to each of the first and second electrode plates to allow the first and second electrode plates to have polarities different from each other when performance of the acceleration switch is tested. 6. The arm-fire device according to claim 1, wherein the stator is connected with a plurality of proof masses, the plurality of proof masses each having a plurality of second contact points, the stator includes a plurality of first contact points corresponding to the plurality of second contact points, and the operation signal is generated by an OR gate when at least one of the plurality of second contact points is in contact with at least one of the plurality of first contact points corresponding to the at least one of the plurality of second contact points. 7. The arm-fire device according to claim 6, wherein the operation signal is charged at a condenser connected to the OR gate, and the signal charged at the condenser is applied to a D flip-flop diode so as to be converted to a continuous signal. 8. The arm-fire device according to claim 1, wherein a portion where the first and second contact points are in contact with each other is made of a metal material. 9. The arm-fire device according to claim 4, wherein the stator, the proof mass and the elastic member are formed of the same material. 10. The arm-fire device according to claim 1, wherein the through bulkhead initiator includes:a donor holder formed at the space separated from the ignition portion by the bulkhead;an acceptor holder formed at the space where the ignition portion is provided;a donor portion installed in the donor holder and provided with a low energy exploding foil initiator (LEFFI) fired by the firing signal; andan acceptor portion installed in the acceptor holder, and fired by receiving a shock wave due to firing of the donor portion through the bulkhead, andwherein the low energy exploding foil initiator is fired by a voltage of 1000V. 11. The arm-fire device according to claim 10, wherein the through bulkhead initiator is provided with an insertion hole at a center thereof, into which the donor portion is inserted, and further includes an adaptor detachably formed in the donor holder by a spiral portion formed on an outer surface thereof, and the donor holder is provided with a spiral on an inner side surface thereof for coupling with the spiral portion. 12. The arm-fire device according to claim 10, wherein the acceptor portion is made of CH-6. 13. The arm-fire device according to claim 10, wherein the through bulkhead initiator is provided with a notch formed on at least one surface of the bulkhead initiator, and further includes a cover installed in the bulkhead to cover the ignition portion, and configured to hermetically seal the ignition portion. 14. The arm-fire device according to claim 10, wherein the through bulkhead initiator further includes a detachment layer inserted between the acceptor portion and the ignition portion, and configured to block a reciprocal chemical reaction between the acceptor portion and the ignition portion. 15. The arm-fire device according to claim 1, wherein the through bulkhead initiator further includes an ignition portion case installed in the bulkhead, for inserting the ignition portion thereto. 16. The arm-fire device according to claim 15, wherein the ignition portion case includes: a cup portion formed to fill the ignition portion inside an opening formed at one side thereof; anda sealing portion for sealing the opening,wherein a notch is formed at a part of outer surfaces of the ignition portion case.
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이 특허에 인용된 특허 (11)
Nagennast Crosby O. (Laverne CA), Arming and firing device.
Hibbs Joseph E. (Ridgecrest CA) Chalmers Gerald W. (Ridgecrest CA) Durrell Robert L. (Columbia MD) Smith Walter C. (China Lake CA), Rocket motor igniter, arming firing device.
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