Crash protected memory unit
AssigneeHENSOLDT Sensors GmbH
InventorsNikolaus Stehle, Markus Metzler
Life of this patent
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Abstract
A crash-protected memory unit (100) for a flight recorder comprises: an electronic memory (110), configured to store data; an active casing (120), configured to encase the electronic memory (110), and comprising a heat absorption material (125), adapted to absorb heat by undergoing an endothermic chemical process, thereby providing an active thermal insulation of the electronic memory (110); and a passive casing (130), configured to encase the active casing (120), and comprising a heat resistant material (135) for providing a passive thermal insulation for the electronic memory (110).
Claims12
A crash-protected memory unit for a flight recorder, the crash-protected memory unit comprising:
- an electronic memory, configured to store data;
- an active casing, configured to encase the electronic memory, and comprising a heat absorption material, adapted to absorb heat by undergoing an endothermic chemical process, thereby providing an active thermal insulation of the electronic memory;
- a passive casing, configured to encase the active casing, and comprising a heat resistant material for providing a passive thermal insulation for the electronic memory,
- wherein the heat absorption material comprises an inorganic hydrate, adapted to undergo, as the endothermic chemical process, a dehydration,
- wherein the passive casing and/or the active casing comprise a plurality of openings, adapted to admit a passage of gaseous water, and
- wherein the heat absorption material comprises one or more of the following inorganic hydrates:
- copper(I) sulfate pentahydrate,
- copper(II) sulfate tetrahydrate,
- copper(II) sulfate nonahydrate, and/or
- copper(II) sulfate pentahydrate;
- wherein dehydration of the one or more inorganic hydrates provides a cooling effect through an absorption of heat energy when undergoing the endothermic chemical process;
- and
- wherein the passive casing comprises a spherical surface enclosing the active casing and the electronic memory.
A method for producing a crash protected memory, comprising the steps:
- providing a casing in form of two half-shells, a heat absorption material, and an electronic memory;
- pressing the heat absorption material into the half-shells;
- forming one or more indentations in the heat absorption material;
- inserting the electronic memory in the one or more indentations;
- combining the half-shells holding the heat absorption material and the electronic memory in order to produce the crash-protected memory unit,
- wherein the heat absorption material comprises an inorganic hydrate, adapted to undergo, as the endothermic chemical process, a dehydration,
- wherein the passive casing and/or the active casing comprise a plurality of openings, adapted to admit a passage of gaseous water, and
- wherein the heat absorption material comprises one or more of the following inorganic hydrates:
- copper(I) sulfate pentahydrate,
- copper(II) sulfate tetrahydrate,
- copper(II) sulfate nonahydrate, and/or
- copper(II) sulfate pentahydrate;
- wherein dehydration of the one or more inorganic hydrates provides a cooling effect through an absorption of heat energy when undergoing the endothermic chemical process;
- and
- wherein the passive casing comprises a spherical surface enclosing the active casing and the electronic memory.
Dependencies are inferred from the claim text.