FR3069001B1 - FARADAY RIGID MONOLITHIC TENT MODEL WITH SELF-SUPPORTING ARBORED ARBING ARBOR, AND FARADAY TENT - Google Patents

Abstract

Module (1) of rigid monolithic inflatable freestanding Faraday tent of arch form including: - two arches (2) parallel connected by sleepers (4) parallel to each other and perpendicular to the two arches (2); - A rack and pinion half (5a) disposed on the outside of each arch (2) and configured to perform a possible mechanical assembly with another module (1) of freestanding monolithic inflatable rigid Faraday tent; and - a rack and pinion closure half (5b) disposed on the outside of each arch (2) and configured to perform a possible mechanical assembly with another structural module (1) rigid monolithic inflatable self-supporting or a fabric door ;.

Description

Rigid Monolithic Inflatable Freestanding Shade Module with Low Arc Arch Arch, and Faraday Tent The invention relates to a freestanding monolithic rigid inflatable Faraday tent module, polymorphic when deflated, arched form arched low arch, and associated Faraday tent.

Rigid self-supporting inflatable structures are known for creating large inflatable buildings. Such structures, however, require a continuous air flow, otherwise the structure collapses. Also, such structures can not be used in a clean room, because such a flow of air would fly dust.

In addition, in the aerospace field, it must be possible to test the EMC electromagnetic compatibility of a satellite, or EMC acronym for "ElectroMagnetic Compatibility" in English.

The electromagnetic compatibility of the communication module must be validated by making tests to measure the emission, or RE for acronym "Radiated Emissivity" in English, as well as susceptibility, or RS for acronym of "Radiated Susceptibility" in language English, radiated from repeater chains over a wide frequency band. This test campaign takes place during integration in a clean room during a phase called Assembly, Integration and Testing of Communications Modules, or AIT CM for "Assembly Integration Test Communication Module" in English.

It is known to carry out RE and RS measurements either manually by two operators, or by using a Faraday tent. These measurements also make it possible to measure occasionally a radiofrequency (RF) signal leak in the repeater path, generated by the equipment of the payload or related to the assembly of the various elements (coaxial cables, insulators, switches, waveguides,. ..). For these purposes, measurements should be made either closer to the elements (called "sniff and spray test" in English) or by confining the communication module in an enclosed space (Faraday tent system). A first difficulty is related to the fact that during this phase AIT CM, it is impossible to disconnect the payload and move it. In addition, the space reserved for the integration is very small making it difficult to deploy system to cap the communication module.

The volumetry between the different communication modules can vary from simple to quadruple, so it is impossible to stay on a single size of tent covering the entire range without degrading the sensitivity and quality of measurements.

In addition to their size increase, payloads carry more equipment. Their architectures become more complex and make manual measurements more and more difficult. Indeed, the number of paths to be tested is proportional to the size and complexity of the communication modules. The time required to measure and the probability of error in the configuration of the repeater and / or probe positioning paths make this manual method a solution that is more and more inadequate for increasing the size of the modules. communication.

Measurements closer to the elements are generally performed using an antenna, which is tedious and expensive because requiring several weeks of testing to a plurality of operators.

There are tents equipped with a metal fabric to create a Faraday cage. Their metal structure involves a very large mass (> 500kg) and, in the context of an aerospace activity, needs to be suspended in the air to be deployed above the payload during the entire test phase. This deployment phase is critical and represents a danger for both the operators and the satellite. Such solutions are very expensive, non-modular, heavy and bulky and generally undersized for the current payloads of larger sizes.

An object of the invention is to overcome the problems mentioned above.

Also, it is proposed, according to one aspect of the invention, a rigid inflatable self-supporting monolithic Faraday tent module of arch form comprising: - two parallel arches connected by cross members parallel to each other and perpendicular to the two arches; - A rack and pinion half disposed on the outside of each arch and configured to perform a possible mechanical assembly with another self-supporting inflatable monolithic rigid Faraday tent module; - A rack and pinion half disposed on the outside of each arch and configured to perform a possible mechanical assembly with another structural module rigid monolithic inflatable self-supporting or fabric door; - A rack and pinion half disposed on the inside of each arch and configured to provide a tie of a tent fabric sidewall to the module; and an electrically conductive fabric side wall inside the module provided with two rack and pinion closure halves configured to make the two attachments to the arches.

Thus, it is possible to have a monolithic rigid inflatable freestanding tent module, polymorphic in the deflated state, not requiring a continuous air flow. Such a modular structure has the advantage, in case of failure of a module to be able to repair or change independently of others.

According to one embodiment, the arches are low arc arch.

The presence of low arch arches ensures rigidity and stability of the structure, distributing the forces on the feet of the structure, thus ensuring its maintenance even in the event of under-inflation.

In one embodiment, the spacing between the two pillars of an arch is between 1 m and 10 m, and the radius of curvature of the arc of an arch is greater than 8 m.

Thus, the strength and strength of the structure are assured, providing the ability to carry a load corresponding to the weight of the fabric used to form tents.

According to one embodiment, an arch pillar is of height between 1 m and 10 m, and a crossbar is of length between 1 m and 8 m.

Thus, it is possible, with the same design, to cover a wide range of dimensions.

In one embodiment, the diameter of the pillars and the low arc of an arch is between 50 mm and 250 mm.

Thus, the strength and bulk of the structure are adjusted to the fair to the given functionality and materials to be supported.

According to one embodiment, the module comprises an envelope and an air chamber comprising independent parts.

Thus, in the event of a problem with a module, for example within a structure of several modules, it is possible to repair or change a single module or only a part of a module.

In one embodiment, the shell comprises synthetic textile fibers, such as Dacron (Trade Mark), and the air chamber comprises polyurethane.

These materials offer the advantage of being resistant while being flexible thus facilitating the folding of the module in a small footprint.

According to another aspect of the invention, each independent portion of the air chamber comprises an inflation valve passing through the envelope, and comprising an external network of inflation tubes.

Thus, by adapting the inflation sequence, the module or a structure of several modules can inflate so that the module or the structure, when deployed, directly covers an immobile object such as a satellite in a clean room, without having then to move the module or modules in a small space, such as a clean room.

In one embodiment, the external network of inflation hoses comprises at least one hose clamp configured to isolate a portion of the inflation network.

Thus, it is possible to isolate one or more parts of the module or modules during inflation or deflation.

According to another aspect of the invention, there is provided a vault arch arched Faraday tent with at least one module as previously described, and comprising: - two electrically conductive fabric doors each provided with a half rack-and-pinion closure; an electrically conductive fabric floor mat, comprising at its lower end an RF sealing device between the floor mat and the side wall; a double RF sealing flap by rack closure of the electrically conductive fabric; and at least two electrically conductive fabric fittings, each configured to join two consecutive fabric walls or a wall and a door forming at the ends an RF double seal flap.

Thus, the RF seal is assured on all sides and the electrical conductivity is ensured between all the parts that constitute the Faraday tent.

For example, the RF sealing device with the floor mat includes a flap.

In one embodiment, the Faraday tent is provided with at least one RF cable-sealing device comprising a sleeve positioned on the fabric between the two ends of a double-zip RF seal.

Thus, the RF seal is improved at the passage of the cables.

In one embodiment, a sleeve includes a clamping device configured to clamp the sleeve against cables therethrough.

Thus the RF seal is improved. The invention will be better understood from the study of some embodiments described by way of non-limiting examples and illustrated by the accompanying drawings in which: - Figure 1 schematically illustrates a rigid structural module monolithic inflatable freestanding form arch to low arch arch, according to one aspect of the invention; - Figure 2 schematically illustrates the connections of the parts of a module of Figure 1, according to one aspect of the invention; FIG. 3 schematically illustrates an arch of the module of FIG. 1, according to one aspect of the invention; - Figure 4 schematically illustrates a self-supporting inflatable rigid structure comprising three modules of different sizes according to Figure 1, according to one aspect of the invention; FIG. 5 schematically illustrates a low arch arches arch form tent comprising a rigid structure according to FIG. 4, according to one aspect of the invention; FIG. 6 schematically illustrates a portion of a module of FIG. 1, according to one aspect of the invention; - Figure 7 schematically illustrates a fabric door disposed at the end of a tent according to Figure 5, according to one aspect of the invention; - Figure 8 schematically illustrates a tent of Faraday based on a tent according to Figure 5; Fig. 9 schematically illustrates a floor mat of the Faraday tent of Fig. 8 according to one aspect of the invention; FIG. 10 schematically illustrates a flap as an RF seal between the electrically conductive fabric modules and doors and the electrically conductive floor mat, according to one aspect of the invention; Figures 11 and 12 schematically show an electrically conductive fabric connector configured to join two consecutive fabric walls or a fabric wall and a fabric door; and FIG. 13 schematically represents a cable-pass RF sealing device comprising a sleeve positioned on the fabric between the two ends of a double-zip RF seal, according to one aspect of the invention.

In the various figures, the elements having identical references are identical.

FIG. 1 schematically represents a self-supporting monolithic inflatable monolithic rigid Faraday tent module 1 of low arc arch arch shape comprising: two parallel arches connected by cross members 4 parallel to each other and perpendicular to the two arches 2; - A rack and pinion closure half 5a disposed on the outside of each arch 2 and configured to perform a possible mechanical assembly with another structural module 1 rigid monolithic inflatable self-supporting; - A rack and pinion closure half 5b arranged on the outside of each arch 2 and configured to perform a possible mechanical assembly with another structural module 1 rigid monolithic inflatable self-supporting or a fabric door; - A rack and pinion half 6 disposed on the inside of each arch 2 and configured to make a fastening of an electrically conductive fabric side wall internal to the module 1; and an electrically conductive fabric side wall inside the module 1 provided with two rack and pinion closure halves configured to produce the two attachments to the arches 2.

For the sake of clarity in FIG. 1, the electrically conductive fabric sidewall inside module 1 is not shown in this figure so as not to mask other elements of module 1, but will be represented in other figures. subsequent and referenced 12.

FIG. 2 represents, in close-up, three portions of a module 1, corresponding to the connection of a crossbar 4 to an arch 2, comprising three independent air chambers and three valves V connected to the internal air chambers.

FIG. 3 represents an arch 2 in which the spacing 7 between the two pillars of an arch is between 1 m and 10 m, and the radius of curvature 8 of the arc 3 of an arch 2 is greater than 8 m. An arch pillar 9 has a height of between 1 m and 10 m.

A crossbar 4 is of length between 1 m and 8 m.

The diameter of the pillars 9 and the lowered arch 3 of an arch 2 is between 50 mm and 250 mm.

The structure of a module 1 comprises an envelope and an air chamber, the envelope may comprise synthetic textile fibers, such as Dacron (registered trademark), and the air chamber may comprise polyurethane.

FIG. 4 shows a self-supporting inflatable rigid structure 10 comprising at least one module 1, in this case three modules 1. The modules 1 are two by two connected by their respective rack and pinion closure halves 5a, 5b. The modules 1 may be of identical or different widths (length of the cross members 4). This structure is that of a Faraday tent.

FIG. 5 partially illustrates a low arc arch arches-type Faraday tent 11 having a self-supporting inflatable rigid structure 10 according to FIG.

The tent 11 comprises a fabric module 12 internal to each structural module 1 of the rigid structure, provided with two rack and pinion closure halves 13 respectively configured to achieve the attachment of the fabric to each arch of a structural module 1, respectively with the two rack and pinion halves 6.

FIG. 6 represents a close-up view of a part of a module 1. It shows a rack and pinion closure half 5a disposed on the outside of each arch 2 and configured to realize a possible mechanical assembly with another module. structural 1 rigid monolithic inflatable self-supporting, a rack closure half 5b disposed on the outside of each arch 2 and configured to perform a possible mechanical assembly with another structural module 1 rigid monolithic inflatable self-supporting or a fabric door, and a half rack-and-pinion closure device 6 disposed on the inside of each arch 2 and configured to make a fastening of a side wall 12 of electrically conductive fabric internal to the module 1.

FIG. 7 shows a fabric side door 14 disposed at the end of a Faraday tent 11 according to FIG. 5, of which an end module 1 of the Faraday tent is shown, equipped with double rack and pinion devices. -sens to ensure a passage of cables. Self-gripping strips make it possible to fix a sleeve 18 as described hereinafter in FIG. 13.

Figure 8 shows a Faraday tent 11 according to Figure 5, which comprises a floor mat 16 of electrically conductive fabric.

Figure 9 shows the floor mat 16 as well as the structure of the Faraday tent 11.

Figure 10 shows a flap as RF seal 17 between the side walls 12 (same for the electrically conductive tissue doors 14) and the electrically conductive floor mat 16. An RF double flap seal 18 is used by rack-and-pinion closure of the electrically conductive fabric.

Figs. 11 and 12 respectively show an electrically conductive fabric connector 19 configured to join two consecutive fabric walls 12 or a fabric wall 2 and a cloth door 14, forming at the ends an RF double flap seal (18). . In this case, using "scratch" type fasteners (hook fasteners and textile buckles.

FIG. 13 shows a cable-pass RF sealing device comprising a sleeve, positioned on the fabric between the two ends of a double-zip RF seal, as shown in FIG. 14 at positions 15. FIG. sleeve 21 comprises a clamping device 22, such as a clamping strap, configured to clamp the sleeve against cables passing therethrough, making it possible to adapt the diameter of the sleeve 21 to that of the cables.

Claims (13)

1. Module (1) of rigid monolithic inflatable self-supporting arched form Faraday tent comprising: - two arches (2) parallel connected by cross members (4) parallel to each other and perpendicular to the two arches (2); - A rack and pinion half (5a) disposed on the outside of each arch (2) and configured to perform a possible mechanical assembly with another module (1) of freestanding monolithic inflatable rigid Faraday tent; - A rack and pinion half (5b) disposed on the outside of each arch (2) and configured to perform a possible mechanical assembly with another structural module (1) rigid monolithic inflatable self-supporting or a fabric door; - A rack and pinion half (6) disposed on the inside of each arch (2) and configured to provide a fastener of a side wall (12) of electrically conductive fabric internal to the module (1); and a side wall (12) of electrically conductive fabric internal to the module (1) provided with two rack and pinion closure halves configured to make the two attachments to the arches (2). 2. Module (1) according to claim 1, wherein the arches are arched low arch (3). 3. Module (1) according to claim 2, wherein the spacing (7) between the two pillars (9) of an arch (2) is between 1 m and 10 m, and the radius of curvature (8). the arch (3) of an arch (2) is greater than 8 m. 4. Module (1) according to one of claims 2 or 3, wherein a pillar (9) of arch (2) is of height between 1 m and 10 m, and a crossbar (4) is of length included between 1 m and 8 m 5. Module (1) according to one of claims 2 to 4, wherein the diameter of the pillars (9) and the low arc (3) of an arch (2) is between 50 mm and 250 mm. 6. Module (1) according to one of claims 1 to 5, comprising an envelope and an air chamber comprising a plurality of independent parts. 7. Module (1) according to claim 6, wherein the envelope comprises synthetic textile fibers and the air chamber comprises polyurethane. 8. Module (1) according to claim 6 or 7, wherein each independent portion of the air chamber comprises an inflation valve passing through the envelope, and comprising an external network of inflation pipes. 9. Module (1) according to claim 8, wherein the external network of inflation pipes comprises at least one pipe clamping device configured to isolate a portion of the inflation network. 10. Faraday tent (11) of arches arch low arc shape comprising at least one module (1) according to one of the preceding claims, and comprising: - two doors (14) of electrically conductive fabric each provided with a half of a rack and pinion closure; - an electrically conductive fabric floor mat (16), comprising at its lower end an RF sealing device (17) between the floor mat (16) and the side wall (12), - a double flap of RF sealing (18) by rack closure of the electrically conductive fabric; and at least two electrically conductive fabric connections (19), each configured to join two consecutive fabric walls (12) or a wall (12) and a door (14) forming at the ends an RF double flap ( 18). 11. Faraday tent according to claim 10, wherein the RF sealing device with the floor mat comprises a flap (17). 12. Faraday tent according to claim 10 or 11, provided with at least one RF cable passage sealing device comprising a sleeve (21) positioned on the fabric between the two ends of a double-zip of RF waterproofing. 13. Faraday tent according to claim 12, wherein the sleeve (21) comprises a clamping device (22) configured to clamp the sleeve against cables therethrough.