Networked electronic ordnance system

• US 7,644,661 B1
• Filed: 09/06/2000
• Issued: 01/12/2010
• Est. Priority Date: 09/06/2000
• Status: Expired due to Term

• Current Assignee: Special Devices Incorporated (Daicel Corporation), KT Tech, Inc. (KT Corporation)
• Original Assignee: PS EMC West LLC (Fortive Corp.)
• Inventors: Walsh, John J., Diamond, Michael N., Nelson, Steven D.
• Primary Examiner(s): Chambers; Troy
• Application Number:
  US09/656,325
• Time in Patent Office: 3,415 Days
• Field of Search: 102/202.5, 102/215, 102/206, 102/360, 102/200, 102/202.7, 102/217, 102/218
• US Class Current: 102/202.5
• CPC Class Codes: F42C 15/40 wherein the safety or arming action is effected electrically
• CPC Class Codes: F42D 1/05 Electric circuits for blasting

Abstract

The networked electronic ordnance system connects a number of pyrotechnic devices to a bus controller using lighter and less voluminous cabling, in a more efficient network architecture, than previously possible. Each pyrotechnic device contains an initiator, which includes a pyrotechnic assembly and an electronics assembly. One or more pyrotechnic devices each contain a logic device having a unique identifier. The pyrotechnic devices are individually controlled by the bus controller by addressing the unique identifier of each logic device. Each pyrotechnic device preferably includes an energy reserve capacitor which stores firing energy upon arming. Both digital and analog fire control conditions are provided before an armed pyrotechnic device can be fired. A plurality of initiators and/or other components of the system may be packaged together on a single substrate and networked together via that substrate.

Claims

1. A networked electronic ordnance system, comprising:

a bus controller connected to a network for (1) transmitting onto the network a digital arming command using at least one unique identifier, (2) altering an analog condition of the network to correspond to a firing command, and (3) transmitting onto the network a digital firing command using at least one unique identifier, the digital arming command causes activation energy to change one or more of a plurality of pyrotechnic devices connected be the network to the bus controller; and

at least one of the plurality of the pyrotechnic devices including;

a bus interface for sensing the analog condition of the network,

a capacitor for storing the activation energy,

an initiator, and

a logic device having a unique identifier that stores activation energy in the capacitor upon receiving the digital arming command that includes the unique identifier of its logic device, and, once armed, releases the stored activation energy from the capacitor into the initiator upon (1) detecting that the digital firing command is received that includes its unique identifier, and (2) determining that the bus interface senses that the analog condition of the network corresponds to the received firing command.

2. The networked electronic ordnance system of claim 1, wherein an analog condition of the network can be its voltage level, modulation depth, or frequency.

3. The networked electronic ordnance system of claim 1, wherein the at least one pyrotechnic device discharges the stored activation energy when a digital disarming command is received that includes the unique identifier of its logic device.

4. The networked electronic ordnance system of claim 1, wherein the plurality of pyrotechnic devices are integrated into a missile.

5. The networked electronic ordnance system of claim 1, wherein the plurality of pyrotechnic devices are integrated into an aircraft.

6. The networked electronic ordnance system of claim 3, wherein after a disarming command has been acted upon in the pyrotechnic device, the pyrotechnic device responds to the bus controller by transmitting its disarmed status over the network.

7. The networked electronic ordnance system of claim 1, wherein the bus controller generates the digital arming command.

8. The networked electronic ordnance system of claim 1, wherein after an arming command has been acted upon in the pyrotechnic device, the pyrotechnic device responds to the bus controller by transmitting its armed status over the network.

9. The networked electronic ordnance system of claim 1, wherein the bus controller periodically queries pyrotechnic devices at regular intervals to confirm that firing capability in the device remains intact.

10. The networked electronic ordnance system of claim 1, wherein the bus controller determines network status by transmitting a network signal to one or more pyrotechnic devices and then sensing whether the signal is echoed back in response.