Equipment for measuring tire pressure

Abstract

The present invention relates to a pressure measuring device for a tire, comprising: - electronic circuitry distributed on a first and second surface of an electronic plate, and including a pressure sensor mounted on the first surface of the electronic plate; - an antenna connected to the electronic circuitry; - a first housing portion covering the first surface such that they jointly define a first volume, and including a channel for fluidly connecting the first volume to the outside; - a second housing portion covering the second surface such that they jointly define a second volume, and having a base for resting against an inner surface of the tire tread, the second housing portion being arranged such that the antenna laterally protrudes relative to the second housing portion, and the center of gravity of the housing is located in the second volume spaced apart from the electronic plate.

Description

Technical Field

[0001] This invention relates to a device for measuring the pressure of a tire to be fitted onto an aircraft. Background Technology

[0002] Typically, aircraft wheels consist of a rim and a tire mounted on the rim, with the rim and tire defining the internal volume filled with pressurized gas. Regulations require that the pressure of the gas inside the tire be measured at least once a day. If the tire is underinflated, the aircraft is not permitted to take off.

[0003] The pressure of the gas contained in the tire is usually measured manually using a pressure gauge connected to the inflation valve that is integral with the rim and in communication with the internal volume.

[0004] Tires equipped with pressure measuring devices embedded inside the tire are known to facilitate ground maintenance operations. The pressure measuring device collects digital data related to the pressure of the gas contained in the tire and transmits this data to a remotely positioned reader via radio waves, without requiring touching the tire or performing any manual operation.

[0005] Such pressure measurement devices typically include a housing extending around an electronics board housing a pressure sensor and electronic components distributed on the same surface of the electronics board. The housing includes channels for fluidly connecting the pressure sensor to the outside. A portion of the electronics board extends laterally from the housing, including antenna wires for connection to a radio transceiver.

[0006] A pressure measuring device is inserted into a rubber patch adhered to the inner surface of the tire. This patch is prefabricated to receive and hold the pressure measuring device in place, and serves to absorb the impacts and deformations experienced by the tire as it rolls, particularly during takeoff and landing.

[0007] However, the rolling of the tire causes a significant amount of relative movement between the pressure measuring device and the patch, which eventually degrades and no longer provides its function of holding the pressure measuring device on the tire tread, resulting in tread damage. Summary of the Invention

[0008] Therefore, the object of the present invention is to provide a pressure measuring device that can at least partially prevent the above-mentioned problems.

[0009] Therefore, according to the present invention, a measuring device is provided, comprising:

[0010] - Electronic circuitry, distributed on a first and second face of an electronic board, and including a pressure sensor mounted on the first face of the electronic board;

[0011] - At least one antenna connected to the electronic circuit;

[0012] - A first housing portion, which at least partially covers a first face such that they together define a first volume, and includes at least one first channel that fluidly connects the first volume to the outside; and

[0013] - A second housing portion, which at least partially covers the second face, such that they together define a second volume, and has at least one bottom for resting against the inner surface of the tire.

[0014] According to the invention, the second housing portion is arranged such that the antenna protrudes laterally at least relative to the second housing component, and the center of gravity of the device is located in a second volume spaced apart from the electronic board.

[0015] By positioning the center of gravity below the electronic plate, this pressure measuring device serves to limit the amplitude of relative movement between the device and the tire during tire rolling, and thus prevents the pressure measuring device from detaching from the tire.

[0016] Specifically, the height of the first housing portion is less than the height of the second housing portion.

[0017] Specifically, the first volume is smaller than the second volume.

[0018] Specifically, the first housing portion is inlaid on the projection surface of the second housing portion on the same first surface along an axis orthogonal to the first surface of the electronic board.

[0019] Specifically, the antenna includes wires extending within the electronic board.

[0020] Specifically, the antenna is roughly triangular in shape.

[0021] Specifically, the second housing portion includes an outer surface that is at least partially convex in shape.

[0022] Specifically, the sidewall of the second housing portion includes an outer annular groove forming means for securing the device to the tire.

[0023] Specifically, the shell is roughly cylindrical in shape.

[0024] The present invention also relates to a tire including such a pressure measuring device.

[0025] Depending on the specific features, the bottom of the second housing portion rests against the inner surface of the tire tread.

[0026] Specifically, the tire includes a connecting element that adheres to the inner surface of the tire tread, the connecting element including a receiving portion into which a second housing portion is inserted.

[0027] The present invention also relates to a wheel including such a tire.

[0028] The present invention also relates to aircraft landing gear comprising at least one such wheel.

[0029] The invention will be better understood by reading the following description, which is given only by way of the non-limiting description of the invention. Attached Figure Description

[0030] Please refer to the attached diagram, in which:

[0031] - Figure 1A This is a perspective view of a pressure measuring device according to a first embodiment of the present invention;

[0032] - Figure 1B This is a schematic cross-sectional view of the pressure measuring device shown in Figure 1;

[0033] - Figure 1C This is a detailed view of the electronic board of the pressure measuring device shown in Figure 1;

[0034] - Figure 2 Is it set Figure 1A , Figure 1B , Figure 1C A schematic partial cross-sectional view of the aircraft wheel of the pressure measuring device shown;

[0035] - Figure 3 yes Figure 1A , Figure 1B , Figure 1C A perspective view of the first variant of the pressure measuring device shown;

[0036] - Figure 4 yes Figure 1A , Figure 1B , Figure 1C A perspective view of the second variant of the pressure measuring device shown;

[0037] - Figure 5 yes Figure 1A , Figure 1B , Figure 1C A perspective view of the third variant of the pressure measuring device shown;

[0038] - Figure 6 yes Figure 1A , Figure 1B , Figure 1C A perspective view of the fourth variant of the pressure measuring device shown;

[0039] - Figure 7 yes Figure 1A , Figure 1B , Figure 1C A perspective view of the fifth variant of the pressure measuring device shown; and

[0040] - Figure 8This is a schematic cross-sectional view of a pressure measuring device according to a second embodiment of the present invention. Detailed Implementation

[0041] refer to Figure 1A and Figure 1B According to a first embodiment of the present invention, the pressure measuring device 1 includes a phenolic resin housing 10 extending along a vertical axis Z, which is mainly cylindrical in shape herein. The housing 10 includes a first portion 10.1 and a second portion 10.2, both arranged on opposite sides of an electronic plate 20 extending in a horizontal plane XY.

[0042] The first portion 10.1 of the housing 10 defines a first “dirty” volume V1 with the first face 20.1 of the electronic board 20 and forms a cover with a flat upper surface 11. The first housing portion 10.1 includes a first channel 12 for fluidly connecting the first volume V1 to the outside.

[0043] The second portion 10.2 of the housing 10 defines a second “net” volume V2 with the second face 20.2 of the electronic board 20 and forms a cap with a flat bottom 13. The second portion 10.2 of the housing 10 includes an outer annular groove 14 that forms a clamping device for the pressure measuring device 1 and defines a generally convex outer surface 15 with the bottom 13. The profile of the outer surface 15 presents a first planar region 15.1 and a second planar region 15.2 in a plane passing through the axis Z, which are slightly inclined relative to each other and relative to the axis Z.

[0044] The first part 10.1 and the second part 10.2 of the housing 10 have heights H1 and H2 respectively along the axis Z. It should be noted that the height H1 of the first part 10.1 is less than the height H2 of the second part 10.2, and the volume V1 is less than the volume V2.

[0045] The electronic board 20 includes a second through channel that fluidly connects a first volume V1 and a second volume V2. The second channel 21 has a circular cross-section with a diameter between 100 and 300 micrometers, preferably 200 micrometers. The first channel 12 has a circular cross-section with a diameter smaller than that of the second channel 21 to facilitate air circulation between the first volume V1 and the second volume V2, thereby achieving better pressure dynamics between the first volume V1 and the second volume V2.

[0046] like Figure 1CAs shown, the electronic circuitry is distributed on the first surface 20.1 and the second surface 20.2 of the electronic board 20. The electronic circuitry includes a pressure sensor 30, a radio transceiver 31, a microcontroller 32, an electromagnetic energy recovery unit 33, and a battery 34. The pressure sensor 30 and the radio transceiver 31 are mounted on the first surface 20.1 of the electronic board 20 and extend into the first volume V1. The microcontroller 32, the energy recovery unit 33, and the battery 34 are mounted on the second surface 20.2 of the electronic board 20 and extend into the second volume V2.

[0047] The pressure sensor 30 includes a mechanical protective cap 35 that defines a sealed enclosure under a reference pressure. In this example, the pressure sensor 30 is a piezoelectric sensor comprising a membrane 36 extending parallel to a first facet 20.1 of the electronics plate 20 and having a first electrode 37.1. The upper portion of the cap 35 forms a second electrode 37.2 of a capacitor. A third channel 22 passing through the electronics plate 20 fluidly connects the enclosure defined by the cap 35 to a second volume V2. The third channel 22 has a circular cross-section, the diameter of which is substantially equal to the diameter of the second channel 21.

[0048] The energy recovery unit 33 includes a converter that converts its captured kinetic energy into electrical energy, which is then sent to the battery 34 for storage. In this example, the energy recovery unit 33 includes a sphere made of ferromagnetic material that can move freely within the air gap of a coil. The battery 34 powers the microcontroller 32 and the radio transceiver 31.

[0049] like Figure 1C As shown, the second channel 21 is provided with a metal coating 23 obtained by metal electroplating. Each metal coating 23 is connected to a terminal of the battery 34, specifically the positive terminal. A ring 24 extends around each metal coating 23 at a non-zero distance. In this example, each ring 24 is made by depositing copper in a machined groove 25 in the electronic board 20 and is connected to a first terminal of the battery 34, specifically the negative terminal. Advantageously, the ring 24 is significantly recessed from the first face 20.1 of the electronic board 20 to form a holding area.

[0050] The electronic board 20 also includes a first side portion 26.1 and a second portion 26.2, which laterally project along a horizontal axis X perpendicular to axis Z on both sides of the housing 10. Wires or antenna tracks 27.1, 27.2 connecting to the radio transceiver 31 extend inside the first portion 26.1 and the second portion 26.2. In this example, the first portion 26.1 and the second portion 26.2 are substantially the same in shape, and specifically triangular in this case.

[0051] like Figure 2 As shown, the pressure measuring device 1 is placed inside the wheel R of the aircraft landing gear.

[0052] The wheel R includes a rim J, on which a tire P is mounted, together with the rim J defining an internal volume V filled with pressurized nitrogen. A connecting element 40, made of an elastomeric material, serves to fix the pressure measuring device 1 to the inner surface of the tire tread and to absorb the impacts and deformations experienced by the tire during rolling.

[0053] The connecting element 40 includes a base 41 that is generally truncated conical in shape, the large base of which is adhered to the inner surface of the tread of the tire P, and the small base of which forms the main cylindrical bottom 42.1 of the receiving portion 42.

[0054] The receiving portion 42 includes a sidewall 42.2 and an opening 42.3. The sidewall has an inner surface arranged to mate with the outer surface 15 of the second housing portion 10.2 of the housing 10. The opening is for inserting the second housing portion 10.2 of the pressure measuring device 1 into the receiving portion 42. The opening 42.3 is defined by an annular rim 42.4, which is arranged to engage in an outer annular groove 14 to secure and retain the second housing portion 10.2 in the receiving portion 42.

[0055] The aircraft is equipped with a radio transceiver tuned to the transmit and receive frequencies of the radio transceiver 31 of the pressure measuring device 1.

[0056] In operation, pressurized air contained in the internal volume V defined by the rim J and tire P infiltrates into the first volume V1 through the first channel 12 of the housing 10. The first channel 12 performs a first filtration of particles (dust, shavings, sand, etc.) that may be present in the internal volume V. A second filtration of the air is performed by the second channel 21 as the air flows from the first volume V1 to the second volume V2. The air present in the second volume V2 then infiltrates into the enclosure defined by the cap 35 of the pressure sensor 30 and acts on the membrane 36. Under the air pressure in the enclosure, the membrane 36 deforms, and the capacitance of the capacitor associated with the membrane 36 changes. An analog-to-digital converter integrated in the microcontroller 32 converts the capacitance into a pressure value, which is then transmitted to the aircraft's radio transceiver using the radio transceiver 31 of the pressure measuring device 1.

[0057] Battery 34 establishes a voltage between the metal coating 23 of the second channel 21 and the ring 24 surrounding it, thereby electrolyzing and evaporating any water that might clog the second channel 21. The diameter of the second channel 21 promotes water retention through capillary action and helps prevent moisture in the air contained in the wheel R from penetrating as far as the second volume V2. The water retention in the second channel 21 and the water electrolysis device serves to limit the presence of water on the membrane 36 and protect the pressure measuring device 1 from the harmful consequences of icing during aircraft flight. In fact, the presence of frozen water on the membrane 36 usually renders the pressure sensor 30 inoperable and often leads to its destruction.

[0058] During the rotation cycle of wheel R, energy recovery unit 33 converts the kinetic energy borne by device 1 into electrical energy stored in battery 34.

[0059] The electronic board 20 is connected to the first portion 10.1 and the second portion 10.2 of the housing 10 via flexible adhesive beads. These adhesive beads allow relative movement between the electronic board 20 and the housing 10, which serves to limit the transmission of vibrations and impacts experienced by the wheel R to the electronic board 20. The adhesive has a hardness ranging from Shore 00 30 to Shore A 60.

[0060] The distribution of electronic components 30, 31, 32, 33, and 34 on the first portion 20.1 and the second portion 20.2 of the electronic plate 20, along with the shape and dimensions of the housing 10 (particularly the heights H1 and H2), allows the center of gravity G of the pressure measuring device 1 to be located in the second volume V2, spaced apart from the electronic plate 20. Furthermore, due to the symmetrical arrangement of the first portion 26.1 and the second portion 26.2 of the electronic plate 20 on the outside of the housing 10, the center of gravity G is substantially located on the central axis Z of the housing 10.

[0061] By positioning the center of gravity G below the electronic plate 20, the pressure measuring device 1 serves to limit the relative movement between the receiving part 42 and the pressure measuring device 1 caused during wheel R rolling, thus limiting the degradation of the connecting element 40 adhering to the tire tread of the device 1. The angular clearance of the device 1 is also limited, thereby limiting the risk of the antenna impacting the inner surface of the tire.

[0062] Figure 3 Device 100 is shown, and the device is Figure 1A , Figure 1B , Figure 1C The first variation of device 1 is shown. The pressure measuring device 100 differs from device 1 in that the housing 10 includes lugs formed by a first protrusion 16.1 and a second protrusion 16.2, which extend laterally from the upper end of a second portion 10.2 of the housing 10. The first protrusion 16.1 and the second protrusion 16.2 are substantially identical in shape and mate with the second face 20.2 of the electronic board 20 at the first portion 26.1 and the second portion 26.2 to limit the bending of the first portion 26.1 and the second portion 26.2 due to the rotation of the wheel R under its own weight.

[0063] Figure 4 Device 200 is shown, and the device is Figure 1A , Figure 1B , Figure 1CThe second variation of device 1 is shown. The pressure measuring device 200 differs from device 1 in that the first portion 10.1 of the housing forms a cover with an upper surface 11 having an outwardly curved shape while maintaining a planar lower surface. Therefore, the length of the first channel 12 is increased. The curved upper surface 11 of the first portion 10.1 of the housing 10 and the increased length of the first channel 12 make it possible to limit the accumulation of contaminants immediately adjacent to the inlet orifice of the first channel 12.

[0064] Figure 5 Device 300 is shown, and the device is Figure 1A , Figure 1B , Figure 1C The third variation of device 1 is shown. The pressure measuring device 300 differs from device 1 in that the first portion 10.1 of the housing includes a generally frustoconical upper portion 11 with a flat upper wall through which the first channel 12 passes, and the upper wall is connected to the frustoconical wall. For device 200, adding a ramp to the upper portion 11 limits the accumulation of contaminants immediately adjacent to the inlet orifice of the first channel 12.

[0065] Figure 6 A pressure measuring device 400 is shown, which is Figure 1A , Figure 1B , Figure 1C The fourth variation of device 1 is shown. Device 400 differs from device 300 in that a first channel 12 obliquely passes through the truncated conical wall of the upper portion 11. The first channel 12 opens inside the first volume V1 through a hole, which is further away from the electronic plate 20 than the inlet holes that open outside the volume V1. The positioning of the first channel 12 serves to limit the accumulation of contaminants immediately adjacent to the inlet holes of the first channel 12.

[0066] Figure 7 A pressure measuring device 500 is shown, which is Figure 1A , Figure 1B , Figure 1C The fifth variant of device 1 is shown. Device 500 differs from device 1 in that the first channel 12 extends parallel to the first surface 20.1 of the electronic plate 20, thereby limiting the accumulation of contaminants in the immediate vicinity of the inlet hole of the first channel 12 for devices 200 to 400.

[0067] Figure 8A pressure measuring device 600 according to a second embodiment of the present invention is shown. The device 600 differs from device 1 in that the diameter of the outer surface 15 of the second portion 10.2 of the housing 10 is enlarged near the bottom 13, such that the projection surface of the first portion 10.1 of the housing 10 along axis Z on the first face 20.1 of the electronic plate 20 is inscribed in the projection surface of the second portion 10.2 of the housing 10 on the same face 20.1 and along the same axis Z, while the volume V2 remains unchanged. As a result, the center of gravity G is now closer to the bottom 13 of the housing 10 compared to the second face 20.2 of the electronic plate 20. Furthermore, the second housing portion 10.2 therefore includes an external bulge near the bottom 13, which fits tightly against the wall of the receiving portion 42 to ensure that the second housing portion 10.2 is fixed to the inner surface of the tire.

[0068] Of course, the present invention is not limited to the described embodiments, but covers any variations that fall within the scope of the invention as defined by the claims.

[0069] Although the pressure measuring device described herein includes a housing made of phenolic resin, the invention is equally applicable to other types of housings, such as those made of metal, carbon fiber, epoxy resin, or other materials.

[0070] Although the shell here is cylindrical, the invention is also applicable to shells of other shapes, such as egg-shaped, rectangular box-shaped, or any shape.

[0071] Although the antenna is part of the electronic board here, it can also be made of one or more metal wires, which can be straight, wound to form a spring or a spiral, or have other shapes.

[0072] Although the electronic board here uses silicone-based flexible beads to fix it to the housing, the present invention is also applicable to other types of connections between the housing and the electronic board that allow relative movement between the housing and the electronic board, such as synthetic or natural seals of rubber or EPDM type.

[0073] Although the first, second, and third channels here have circular cross-sections, the present invention is also applicable to first, second, and / or third channels with different cross-sections, such as square or other cross-sections.

[0074] Although the pressure measurement device here includes a microcontroller, the invention is also applicable to other signal processing devices, such as FPGAs, logic gates, or microprocessors.

[0075] This invention is applicable to any device used to connect components to electronic circuits, such as connections on PCB-type supports via wires, soldering / soldering, broaching, or sintering.

[0076] Although the pressure measuring device here includes a radio transceiver (e.g., "RFID" type), the present invention is applicable to any type of wireless transmission technology, such as "LoRa", "edge", "Wi-Fi", "Bluetooth", ultrasonic or "IoT" type 2G, 3G, 4G, 5G protocols.

[0077] Although the pressure measuring device here includes an electromagnetic energy converter, the invention is equally applicable to other types of energy converters, such as piezoelectric induction kinetic energy converters or thermal energy converters.

[0078] Although the measuring device is placed in the aircraft's wheels, the invention is also applicable to other vehicles, such as trucks or cars.

[0079] Although the tires here are filled with pressurized nitrogen, the present invention is also applicable to tires filled with other types of pressurized fluids, such as air or inert gases other than nitrogen.

[0080] Although the pressure sensor here is piezoelectric, the invention is also applicable to other types of pressure sensors, such as resistive, inductive, piezoresistive, capacitive, or resonant sensors.

[0081] Although the second channel here has a metal coating obtained by metal electroplating, the present invention is also applicable to other means of applying a metal coating in the second channel, such as rolling a metal sleeve or applying a conductive coating.

[0082] The second channel may not have a metal coating.

[0083] Although the copper rings housed in the grooves in the first surface of the electronic board extend around each second channel, the invention is equally applicable to other types of conductive elements placed near the second channels, such as square or arbitrary-shaped rings, metal plated on the surface of the first electronic board, or prints using conductive ink.

[0084] Although the pressure measuring device here includes a rechargeable battery, the invention is equally applicable to other types of voltage generators, such as main batteries or capacitors.

[0085] Although the conductive element here is connected to the negative terminal of the voltage generator, and the coating of each second channel is connected to the positive terminal of the voltage generator, the invention is equally applicable to reversed connection polarities.

[0086] Although the electronic board is connected to the housing via adhesive beads, the invention is also applicable to other types of connections between the housing and the electronic board, such as one or more elastomeric pins extending from a first surface of the electronic board to a first portion of the housing, and one or more elastomeric pins extending from a second surface of the electronic board to a second portion of the housing.

[0087] Although the first and second portions of the electronic board extending outside the housing are rigid portions carrying the antenna, the first and second portions may also be flexible and / or contain other types of conductive elements associated with components below the housing.

[0088] Pressure measuring devices may also include a temperature sensor for transmitting temperature and / or performing temperature compensation for pressure sensor measurements. Temperature measurement can be performed using a dedicated sensor, or it can be performed on a piezoresistive sensor by measuring the input resistance of the sensing element or any other combination of resistances through the piezoresistive sensor. The result will provide only a temperature profile of the pressure removed in the performed combination (the resistances working longitudinally or laterally give positive and negative measurement factors, respectively).

[0089] For the sake of measurement redundancy, it is advisable to place several pressure measuring devices in the same wheel.

[0090] Although the first and second parts of the electronic board are triangular in shape, the invention is equally applicable to any other shape, such as rectangular parts.

[0091] Although the bottom of the housing rests indirectly on the inner surface of the tire tread via a connecting element, the bottom can also rest directly on the inner surface of the tire tread.

[0092] If the center of gravity G is located below the electronic board 20, the volume V1 can be equal to or greater than the volume V2. For example, it can be envisioned that the bottom 13 of the second part 10.2 of the housing 10 is thicker to lower the center of gravity G, and the resulting volume V2 is substantially equal to the volume V1.

[0093] The diameter of the first channel 12 may be larger than the diameter of the second channel 21 in order to improve the filtration of the air traveling from the first volume V1 toward the second volume V2, so as to reduce its circulation between the first volume V1 and the second volume V2.

[0094] The diameter of the third channel 22 can be larger than the diameter of the second channel 21, so that the particles filtered by the second channel 21 cannot close the third channel 22.

[0095] The electronic circuitry may include other electronic components that replace and / or are added to electronic components 31, 32, 33, and 34. However, so-called “critical” components, i.e. those that may be damaged by particles (dust, shavings, sand, etc.) contained in the internal volume V, will preferably be distributed on the second surface 20.2 of the electronic board 20, in other words, distributed in the second volume V2, thereby benefiting from the dual filtration performed by the first channel 12 and the second channel 21.

Claims

1. A pressure measuring device (1, 100, 200, 300, 400, 500, 600) for tire P, comprising: Electronic circuitry, distributed on a first facet (20.1) and a second facet (20.2) of an electronic board (20), and including a pressure sensor (30) mounted on the first facet of the electronic board; At least one antenna (26.1, 26.2), said at least one antenna being connected to the electronic circuit; The first portion (10.1) of the housing (10) at least partially covers the first face so that they together define the first volume V1, and includes at least one first channel (12) that fluidly connects the first volume to the outside; as well as The second portion (10.2) of the housing (10) at least partially covers the second face so that they together define the second volume V2 and has at least one bottom (13) to rest against the inner surface of the tire. The second housing portion is arranged such that the antenna protrudes laterally at least relative to the second housing portion, and the center of gravity of the device is located in the second volume separated from the electronic board.

2. The device (1, 100, 200, 300, 400, 500, 600) according to claim 1, characterized in that, The height H1 of the first part (10.1) of the housing (10) is less than the height H2 of the second part (10.2) of the housing (10).

3. The device (1, 100, 200, 300, 400, 500, 600) according to claim 1 or 2, characterized in that, The first volume V1 is smaller than the second volume V2.

4. The device (1, 100, 200, 300, 400, 500, 600) according to claim 1 or 2, characterized in that, The first part (10.1) of the housing (10) is inscribed on the projection surface of the first face (20.1) of the electronic board (20) along the axis Z orthogonal to the first face, in the projection surface of the second part (10.2) of the housing (10) along the same direction on the same first face.

5. The device (1, 100, 200, 300, 400, 500, 600) according to claim 1 or 2, characterized in that, The antenna (26.1, 26.2) includes wires or tracks (27.1, 27.2) extending within the electronic board (20).

6. The device (1, 100, 200, 300, 400, 500, 600) according to claim 5, characterized in that, The antennas (26.1, 26.2) are rectangular in shape.

7. The device (1, 100, 200, 300, 400, 500, 600) according to claim 1 or 2, characterized in that, The second portion (10.2) of the housing (10) includes an outer surface (15) that is at least partially raised.

8. The device (1, 100, 200, 300, 400, 500, 600) according to claim 7, characterized in that, The sidewall of the second housing portion includes an outer annular groove (14) that forms a means for securing the device to the tire P.

9. The device (1, 100, 200, 300, 400, 500, 600) according to claim 7, characterized in that, The shell (10) is mainly cylindrical in shape.

10. A tire (52) comprising a pressure measuring device (1, 100, 200, 300, 400, 500, 600) according to any one of claims 1 to 9.

11. The tire P according to claim 10, characterized in that, The bottom (13) of the second part (10.2) of the housing (10) rests against the inner surface of the tire P tread.

12. The tire P according to claim 11, characterized in that, The device includes a connecting element (40) that adheres to the inner surface of the tire tread, the connecting element including a receiving portion (42) into which the second portion (10.2) of the housing (10) is inserted.

13. A wheel (R) comprising the tire P according to any one of claims 10 to 12.

14. An aircraft landing gear comprising at least one wheel R as claimed in claim 13.

Images