Systems and methods for shock-resistant memory devices
View Patent ↗A shock-resistant memory device comprises a housing and a memory module. The memory module is disposed within the housing and surrounded by potting material to protect the memory module from damage during a shock event. The housing can include a port that accommodates a data connection between the memory module and a sensor from which data is desirably received by the memory module. During a shock event the connection between the memory module and the sensor may be severed, but data stored in the memory module can be retained in the memory module which is protected by the housing. To facilitate retrieval of the memory device subsequent to a shock event, a balloon can be affixed to the housing. The balloon can be configured to inflate subsequent to the shock event so that the shock-resistant memory device does not sink in water and to make the memory device more visible for recovery.
1. A system for preserving data for retrieval subsequent to a high-shock event, the system comprising:
a housing that defines an interior cavity;
an electronics package disposed within the interior cavity of the housing, the electronics package comprising a transmitter and a memory module, the memory module storing data for retrieval subsequent to a high-shock event;
a potting material disposed within the housing and surrounding the electronics package such that the electronics package is suspended in the potting material;
a balloon affixed to the housing, the balloon configured to inflate subsequent to the high-shock event;
an antenna attached to a surface of the balloon; and
a wire running along a surface of the balloon and connecting the antenna to the transmitter, wherein responsive to the balloon being deployed, the transmitter transmits a beacon signal by way of the antenna.
2. The system of claim 1 , the housing comprising:
an inlet port for inflow of the potting material into the interior cavity; and
an outlet port for outflow of excess potting material from the interior cavity during installation of the potting material in the housing.
3. The system of claim 1 , further comprising:
a pyrotechnic device; and
a detonator circuit included in the electronics package, the detonator circuit connected to the pyrotechnic device and configured to cause ignition of the pyrotechnic device subsequent to the high-shock event, thereby causing the balloon to inflate.
4. The system of claim 3 , the detonator circuit comprising a capacitor, the capacitor configured to discharge through the pyrotechnic device subsequent to the high-shock event.
5. The system of claim 1 , wherein the wire is sewn into an envelope of the balloon.
6. The system of claim 1 , wherein the balloon comprises an outer surface, the outer surface having an infrared-reflective coating applied thereto.
7. The system of claim 1 , wherein the balloon comprises an inner surface, the inner surface having a heat-resistant coating applied thereto.
8. The system of claim 7 , wherein the heat-resistant coating comprises a silicone-based coating.
9. The system of claim 1 , the balloon comprising an envelope, the envelope comprising an aramid fiber material.
10. The system of claim 9 , the balloon further comprising an O-ring seal, the housing comprising a protrusion around which the O-ring seal of the balloon is fitted.
11. The system of claim 10 , further comprising a seal cap, the seal cap affixed to the protrusion of the housing such that the O-ring seal of the balloon is held between the sealing cap and the protrusion.
12. The system of claim 1 , wherein the housing is comprised of maraging steel.
13. A shock-resistant memory device, comprising: a housing, the housing comprising: a base portion, the base portion comprising an interior cavity and an opening from the interior cavity, a memory module disposed within the housing, the memory module storing data for retrieval subsequent to a high-shock event; a potting material disposed within the housing and surrounding the memory module such that the memory module is suspended in the potting material; and a balloon affixed to the housing; the memory module and the potting material disposed within the interior cavity: a seal body, the seal body threaded into the opening of the base portion, and wherein the balloon is fitted about a protruding portion of the sealing body: and a sealing cap, the sealing cap threaded about the seal body such that the balloon is affixed to the housing between the seal body and the sealing cap; the balloon configured to inflate subsequent to the high-shock event.
14. The shock-resistant memory device of claim 13 , the base portion comprising a sidewall extending outward about the seal body, wherein the sealing cap is further threaded into the sidewall of the base portion.
15. The shock-resistant memory device of claim 14 , wherein threads of the sidewall of the base portion have an opposing direction to threads of the seal body.
16. The shock-resistant memory device of claim 13 , further comprising a flexible circuit board disposed within the housing and surrounded by the potting material, wherein the memory module is mounted to the flexible circuit board.
17. A system for preserving contents of a memory subsequent to an impact event, the system comprising:
a housing;
a memory module disposed within the housing;
a transmitter disposed within the housing;
a potting material disposed within the housing and surrounding the memory module such that the memory module is suspended in the potting material;
a sensor connected to the memory module and configured to output sensor data to the memory module prior to the impact event, the memory module storing the sensor data for retrieval subsequent to the impact event;
a balloon attached to the housing and configured to inflate after the impact event;
an antenna attached to a surface of the balloon; and
a wire running along a surface of the balloon and connecting the antenna to the transmitter, wherein responsive to the balloon being deployed, the transmitter transmits a beacon signal by way of the antenna.
18. The system of claim 17 , further comprising a timing circuit, wherein the balloon inflates responsive to the timing circuit reaching a threshold time count.