A wirelessly powered aircraft tire temperature and pressure sensor

Abstract

This invention discloses a wirelessly powered aircraft tire temperature and pressure sensor, belonging to the field of aircraft tire pressure monitoring. The sensor includes a housing with a pressure probe mounted at one end and an energy receiving and transmitting module mounted at the other end. The pressure probe houses a data acquisition and transmission circuit board; the energy receiving and transmission module contains an antenna. The pressure probe collects temperature and pressure information from within the aircraft tire and transmits this information to the data acquisition and transmission circuit board. The circuit board processes the temperature and pressure information, converting it into a temperature and pressure radio frequency signal, which is then transmitted to the energy receiving and transmission module. The energy receiving and transmission module uses electromagnetic induction with a handheld terminal to generate an induced voltage, powering the pressure probe and the data acquisition and transmission circuit board, and wirelessly transmits the temperature and pressure radio frequency signal to the handheld terminal via its internal antenna. This sensor is fixed to the corresponding interface on the aircraft tire and does not require disassembly during use, enabling ground-based monitoring of aircraft tire pressure and temperature via a handheld terminal.

Description

Technical Field

[0001] This invention relates to the field of aircraft tire pressure monitoring, and specifically to a wirelessly powered aircraft tire temperature and pressure sensor. Background Technology

[0002] To ensure aircraft safety, monitoring tire temperature and pressure before takeoff is crucial. This allows for timely handling of any abnormalities and ensures smooth taxiing during takeoff and landing.

[0003] Currently, aircraft tire pressure and temperature monitoring devices are generally connected to the aircraft and powered by the aircraft's power supply. To enable the display of tire temperature and pressure on the aircraft interface, the products that need to be installed on the aircraft generally include temperature and pressure sensors and temperature and pressure monitoring control boxes. The control box processes the signals uploaded by the temperature and pressure sensors and transmits them to the aircraft's computer. This configuration requires a lot of onboard space resources, and laying cables also increases the weight of the aircraft and the complexity of the aircraft's power supply system.

[0004] Tire temperature and pressure data for aircraft wheels are crucial for ground maintenance personnel to monitor wheel condition. Generally, tire pressure is monitored on the ground by installing pressure gauges at the valve cores of the tires; however, this process is cumbersome, and momentary leaks are unavoidable during gauge installation and removal. Tire temperature monitoring is also important, providing supplementary information for wheel condition assessment. Due to the lack of convenient tire temperature monitoring equipment, ground maintenance personnel often overlook this aspect. Because of the inconvenience of existing ground-based tire pressure monitoring, for aircraft with onboard tire pressure monitoring capabilities, ground maintenance personnel typically travel to and from the cockpit to read tire temperature and pressure information from the cockpit display. For aircraft without onboard tire pressure monitoring, ground-based pressure gauges must still be installed and removed for tire pressure monitoring.

[0005] Therefore, there is a need to provide a wirelessly powered aircraft tire temperature and pressure sensor to facilitate the monitoring of tire temperature and pressure data of aircraft wheels on the ground. Summary of the Invention

[0006] The technical problem to be solved: To overcome the shortcomings of existing technologies, this invention provides a wirelessly powered aircraft tire temperature and pressure sensor, which is fixed to the corresponding interface of the wheel. Through the sensor structure design, the internal energy receiving and transmitting module powers the sensor and wirelessly transmits the temperature and pressure information collected by the pressure probe to a handheld terminal via radio frequency. The sensor does not need to be disassembled during use, thereby solving the problem of inconvenience in monitoring tire pressure and temperature on the ground in existing technologies.

[0007] The technical solution of the present invention is: a wirelessly powered aircraft tire temperature and pressure sensor, comprising a housing, a pressure probe installed at one end and an energy receiving and transmitting module installed at the other end; a data acquisition and transmitting circuit board is installed inside the pressure probe, the data acquisition and transmitting circuit board is electrically connected to the pressure probe and electrically connected to the energy receiving and transmitting module; an antenna is provided in the energy receiving and transmitting module; The pressure probe is used to collect temperature and pressure information inside the aircraft tires and transmit the collected temperature and pressure information to the acquisition and transmission circuit board. The acquisition and transmission circuit board is used to process the temperature and pressure information collected by the pressure probe and convert it into a temperature and pressure radio frequency signal, which is then transmitted to the energy receiving and transmitting module. The energy receiving and transmitting module is used to generate an induced voltage by electromagnetic induction with the handheld terminal, which powers the pressure probe and the acquisition and transmission circuit board, and wirelessly transmits the temperature and pressure radio frequency signal processed by the acquisition and transmission circuit board to the handheld terminal through its internal antenna.

[0008] A further technical solution of the present invention is: the pressure probe includes: The outer shell has an external thread at one end for connection with the corresponding interface thread on the wheel; the other end is open and the open end of the outer shell is fixedly connected to the housing; the inner cavity of the outer shell is divided into a high-pressure chamber and an atmospheric pressure chamber by a partition; the outer end face of the outer shell facing its open end has an air inlet, which is connected to the high-pressure chamber of the outer shell. Both the pressure core and the platinum resistance thermometer are installed inside the high-pressure chamber of the housing; the pressure core is used to sense the gas pressure information entering the high-pressure chamber through the air inlet; the platinum resistance thermometer is used to sense the temperature information of the gas entering the high-pressure chamber through the air inlet. The conditioning circuit board is installed in the atmospheric pressure chamber inside the outer shell and is electrically connected to the output end of the pressure core and the output end of the platinum resistance thermometer, and is also electrically connected to the acquisition and transmission circuit board. The conditioning circuit board is used to acquire temperature and pressure information, amplify it, and transmit the amplified temperature and pressure information to the acquisition and transmission circuit board.

[0009] A further technical solution of the present invention is as follows: the acquisition and transmission circuit board is installed in the atmospheric pressure cavity of the outer shell, a cover plate is covered on the conditioning circuit board, the cover plate is welded and fixed to the outer shell, and the acquisition and transmission circuit board is fixedly connected to the cover plate; the acquisition and transmission circuit board is provided with multiple plug-in holes for corresponding connection with multiple welding pins provided on the conditioning circuit board, and the cover plate is provided with through holes for the welding pins to pass through; the acquisition and transmission circuit board and the energy receiving and transmitting module are electrically connected.

[0010] A further technical solution of the present invention is: the energy receiving and transmitting module includes: The upper shell has an open end, and the open end of the upper shell is provided with an outwardly folded platform around its perimeter for engaging with one end of the shell. The coil assembly, installed inside the upper housing, is used to obtain the induced voltage; The power board, installed inside the upper housing, is electrically connected to the coil assembly and is used to process the induced voltage into a stable power supply; the antenna is installed inside the upper housing and is electrically connected to the power board. And a flexible board, one end of which is electrically connected to the power board, and the other end is electrically connected to the flexible board pads. The flexible board pads are connected to the inter-board solder pins set on the acquisition and transmission circuit board. The power board supplies power to the acquisition and transmission circuit board and pressure probe via flexible board pads, and transmits the temperature and pressure radio frequency signals processed by the acquisition and transmission circuit board to the antenna. The antenna is used to amplify the temperature and pressure radio frequency signals and send them to the handheld terminal.

[0011] A further technical solution of the present invention is: one end of the shell is open, the open end of the shell is fitted outside the open end of the outer shell, and is fixedly connected to the outer shell by fasteners; the other end of the shell is provided with an opening, the opening is surrounded by an inner edge, the open end of the upper shell is fitted inside the shell, and its outwardly turned platform is engaged with the inner edge of the shell.

[0012] A further technical solution of the present invention is: a pin groove is provided on the platform, and a pin hole is provided on the inner wall of the housing near the inner edge, the pin hole being perpendicular to the axis of the housing; a pin is inserted into the pin hole, and the pin is simultaneously engaged in the pin groove on the platform, the pin being used to prevent the upper housing from rotating inside the housing.

[0013] A further technical solution of the present invention is: a plurality of axially protruding protrusions are evenly distributed around the open end of the housing, the protrusions are engaged with corresponding slots around the periphery of the outer shell, and the housing is fixedly connected to the outer shell by countersunk screws.

[0014] A further technical solution of the present invention is: a first dustproof ring mounting groove is provided at the end of the outer shell away from the threaded end, and a first dustproof ring is installed in the first dustproof ring mounting groove. The first dustproof ring is used to seal the installation gap between the outer shell and the housing; a second dustproof ring is installed between the platform of the upper housing and the inner edge of the housing. The second dustproof ring is used to seal the installation gap between the upper housing and the housing.

[0015] A further technical solution of the present invention is: a sealing ring mounting groove is provided at the end of the external thread of the outer shell, and the sealing ring is fitted into the sealing ring mounting groove. The sealing ring is used for air sealing after the interface between the outer shell and the wheel is screwed together.

[0016] A further technical solution of the present invention is: a fluoroplastic film is provided on the cover plate inside the outer shell, the fluoroplastic film is sandwiched between the cover plate and the acquisition and transmission circuit board, and the fluoroplastic film serves to insulate the acquisition and transmission circuit board.

[0017] The beneficial effects of this invention are as follows: This invention provides a wirelessly powered aircraft tire temperature and pressure sensor. Tire pressure monitoring is achieved by installing a pressure core inside the pressure probe's housing, and tire temperature monitoring is achieved by installing a platinum resistance thermometer. The monitored temperature and pressure information is amplified by a conditioning circuit board and sent to a data acquisition and transmission circuit board for processing. The data acquisition and transmission circuit board converts the temperature and pressure information into a temperature and pressure radio frequency signal and transmits it to an energy receiving and transmitting module. The antenna in the energy receiving and transmitting module feeds back the temperature and pressure radio frequency signal to a handheld terminal. Simultaneously, the energy receiving and transmitting module of this invention includes a coil assembly and a power board. The power board is electrically connected to the data acquisition and transmission circuit board via a flexible board and flexible board pads, enabling the coil assembly to generate an induced voltage and provide electrical energy to the data acquisition and transmission circuit board and the pressure probe. This achieves wireless power supply for the sensor and enables the temperature and pressure radio frequency signal to be transmitted to the antenna for transmission to the handheld terminal. Therefore, this invention's sensor only needs to be installed on the aircraft wheel, without needing to connect to other onboard functional devices or connect to onboard power cables. Only a ground-based handheld terminal device is needed to power and communicate with the sensor, facilitating the acquisition of aircraft wheel and tire temperature and pressure data from the ground. This avoids the cumbersome wiring caused by wired connections to onboard equipment, saves space, and also avoids the inconvenience of ground staff having to travel back and forth to the cockpit to check temperature and pressure data.

[0018] This invention features a battery-free structure that uses wireless power transmission, overcoming the limitations of battery power and improving product safety in high and low temperature environments.

[0019] The temperature and pressure sensor of this invention is installed in a corresponding interface on the wheel, threadedly connected to the wheel, and airtightly connected to the tire cavity by a sealing ring. It does not need to be removed during use and maintenance, and does not affect the replacement of the wheel and tire. Furthermore, the threaded connection to the interface facilitates the installation and removal of the sensor, requiring no special tools and making maintenance and replacement convenient. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the overall appearance structure of a wirelessly powered aircraft tire temperature and pressure sensor according to the present invention. Figure 2 This is a schematic diagram of the internal structure of a wirelessly powered aircraft tire temperature and pressure sensor according to the present invention. Figure 3 This is an exploded view of the structure of a wirelessly powered aircraft tire temperature and pressure sensor according to the present invention. Figure 4 This is a schematic diagram of the internal structure of the pressure probe in this invention; Figure 5 This is a top view of the pressure probe structure in this invention. Figure 6 This is a cross-sectional view of the shell structure in this invention; Figure 7 This is a schematic diagram of the energy receiving and transmitting module in this invention; Figure 8 This is a schematic diagram of the acquisition and transmission circuit board structure in this invention.

[0022] In the diagram: 1. Housing, 11. Inner edge, 12. Pin hole, 13. Protrusion, 14. Connecting hole, 2. Pressure probe, 21. Outer shell, 211. External thread, 212. Air inlet, 213. Sealing ring mounting groove, 214. First dustproof ring mounting groove, 215. Partition, 216. Cover plate, 22. Pressure core, 23. Platinum resistance thermometer, 24. Conditioning circuit board, 241. Welding pin, 25. Groove, 26. First screw hole, 27. Second screw hole 3. Acquisition and transmission circuit board; 31. Insertion hole; 32. Inter-board solder pin; 33. Screw hole; 34. Cylindrical head screw; 4. Energy receiving and transmitting module; 41. Upper housing; 411. Platform; 412. Pin groove; 42. Coil assembly; 43. Power board; 44. Flexible board; 45. Flexible board pad; 46. Antenna; 5. Pin; 6. Countersunk screw; 7. Sealing ring; 8. First dustproof ring; 9. Second dustproof ring; 10. Fluoroplastic film. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] An embodiment of the present invention is a wirelessly powered aircraft tire temperature and pressure sensor. The sensor is installed at a corresponding interface on the aircraft wheel to monitor the temperature and pressure inside the aircraft tire and wirelessly transmit the collected temperature and pressure data of the tire to a handheld terminal.

[0025] like Figure 1-3As shown, the device includes a housing 1, a pressure probe 2, a data acquisition and transmission circuit board 3, and an energy receiving and transmission module 4. The housing 1 has a cylindrical body structure, open at one end and with a circular opening at the center of the other end. The diameter of the opening is smaller than the inner diameter of the housing 1, thus forming an inner edge 11 around the opening. The pressure probe 2 is installed at the open end of the housing 1, and the energy receiving and transmission module 4 is installed at the inner edge 11. The data acquisition and transmission circuit board 3 is installed inside the pressure probe 2 and is electrically connected to both the pressure probe 2 and the energy receiving and transmission module 4. The energy receiving and transmission module 4 contains an antenna 46 for radio frequency transmission.

[0026] The pressure probe 2 is used to collect temperature and pressure information inside the aircraft tire and transmit the collected temperature and pressure information to the acquisition and transmission circuit board 3. The acquisition and transmission circuit board 3 is used to perform data parsing and processing on the temperature and pressure information collected by the pressure probe 2, convert it into a temperature and pressure radio frequency signal and transmit it to the energy receiving and transmitting module 4. The energy receiving and transmitting module 4 is used to generate an induced voltage by electromagnetic induction with the handheld terminal, to power the pressure probe 2 and the acquisition and transmission circuit board 3, and to wirelessly transmit the temperature and pressure radio frequency signal processed by the acquisition and transmission circuit board 3 to the handheld terminal through its internal antenna 46.

[0027] For details, please refer to the following: Figure 4 , Figure 5 The pressure probe 2 includes a housing 21, a pressure core 22, a platinum resistance thermometer 23, and a conditioning circuit board 24. The housing 21 is an open-ended structure with multiple air inlets 212 at the other end. The interior of the housing 21 is divided into two axial chambers by a partition 215, which is welded to the inner wall of the housing. The two chambers are a high-pressure chamber and a normal-pressure chamber. The section from the air inlets 212 to the partition 215 is the high-pressure chamber, and the section from the partition 215 to the open end of the housing 21 is the normal-pressure chamber. The air inlets 212 connect to the high-pressure chamber. An external thread 211 is provided on the outer diameter wall of the end where the air inlets 212 are located, for threaded connection between the housing 21 and the corresponding interface on the wheel. The open end of the housing 21 is fixedly connected to the housing 1. When the interface on the housing and the wheel is installed in place, the air inlets 212 connect the high-pressure chamber of the housing 21 and the tire cavity of the wheel, allowing gas from the tire to enter the high-pressure chamber of the housing 21 through the air inlets 212.

[0028] The pressure core 22 and the platinum resistance thermometer 23 are both welded into the high-pressure chamber of the housing 21. The pressure core 22 is used to sense the gas pressure information entering the high-pressure chamber through the air inlet 212; the platinum resistance thermometer 23 is used to sense the temperature information of the gas entering the high-pressure chamber through the air inlet 212.

[0029] The conditioning circuit board 24 is installed in the atmospheric pressure chamber inside the housing 21. It is electrically connected to the output terminal of the pressure core 22 and the output terminal of the platinum resistance thermometer 23. The pressure core 22 and the platinum resistance thermometer 23 transmit signals to the conditioning circuit board 24 via bonding wires. The conditioning circuit board 24 is electrically connected to the acquisition and transmission circuit board 3. The conditioning circuit board 24 has four solder pins 241 for connecting to corresponding insertion holes 31 on the acquisition and transmission circuit board 3. The pin definitions of the four solder pins 241 are P1: power +, P2: power -, P3: SCL (clock line), and P4: SDA (data line). The conditioning circuit board 24 acquires the pressure data sensed by the pressure core 22 and the temperature data sensed by the platinum resistance thermometer 23, i.e., it acquires the temperature and pressure information inside the tire collected by the pressure core 22 and the platinum resistance thermometer 23, amplifies the temperature and pressure information, and transmits it to the acquisition and transmission circuit board 3 via the solder pins 241. The conditioning circuit board 24 also serves to supply power to the pressure core 22 and the platinum resistance thermometer 23, transferring the electrical energy supplied by the energy receiving and transmitting module 4 to the acquisition and transmitting circuit board 3 to the pressure core 22 and the platinum resistance thermometer 23. A cover plate 216 is installed directly above the conditioning circuit board 24. The cover plate 216 is welded and fixed to the outer shell 21. Four solder pins 241 protrude from the corresponding through holes on the cover plate 216 and are soldered to the corresponding plug-in holes 31 of the acquisition and transmitting circuit board 3.

[0030] like Figure 2 , Figure 3 , Figure 8 As shown, the acquisition and transmission circuit board 3 is installed in the atmospheric pressure chamber inside the housing 21. It is mainly used to analyze the temperature and pressure information transmitted by the pressure probe 2 and transmit it to the energy receiving and transmitting module 4. Simultaneously, the acquisition and transmission circuit board 3 receives power from the energy receiving and transmitting module 4 and also transmits power to the pressure probe 2. Specifically, the acquisition and transmission circuit board 3 is installed on the cover plate 216 inside the housing 21. The acquisition and transmission circuit board 3 has two screw holes 33, through which two cylindrical head screws 34 pass and are fixedly connected to the corresponding second screw holes 27 inside the housing 21. The acquisition and transmission circuit board 3 has four insertion holes 31 corresponding to the four solder pins 241 of the conditioning circuit board 24. These are soldered to the pads to electrically connect the acquisition and transmission circuit board 3 and the conditioning circuit board 24. The definitions of the four insertion holes 31 match the pin definitions of the four solder pins 241. The acquisition and transmission circuit board 3 has inter-board solder pins 32 for electrically connecting the acquisition and transmission circuit board 3 and the energy receiving and transmitting module 4.

[0031] like Figure 2As shown, in order to isolate the acquisition and transmission circuit board 3, a fluoroplastic film 10 is installed on the cover plate 216 inside the cavity of the housing 21. The fluoroplastic film 10 is located between the cover plate 216 inside the cavity of the housing 21 and the acquisition and transmission circuit board 3. The fluoroplastic film 10 isolates the housing 21 and the acquisition and transmission circuit board 3, and also isolates the cover plate 216 and the acquisition and transmission circuit board 3. The fluoroplastic film 10 provides insulation protection for the acquisition and transmission circuit board 3.

[0032] like Figure 7 As shown, the energy receiving and transmitting module 4 includes an upper housing 41, a coil assembly 42, a power board 43, a flexible board 44, flexible board pads 45, and an antenna 46. The upper housing 41 is a cap-shaped structure with one open end. A platform 411 is provided around the open end, which mates with the inner edge 11 of the opening at one end of the housing 41. The coil assembly 42, power board 43, and antenna 46 are all installed inside the upper housing 41. The coil assembly 42 is used to generate electromagnetic induction with the coil assembly inside the external handheld terminal. The coil assembly 42 acts as a receiving coil, working in conjunction with the drive coil of the handheld terminal to obtain an induced voltage. Under the influence of alternating current, the drive coil in the handheld device generates an alternating magnetic field. By approaching the coil assembly 42, energy is transferred to the coil assembly 42. After the power board 43 processes the current and voltage, electrical energy is generated to drive the entire product. The power board 43 is electrically connected to the coil assembly 42. One end of the flexible board 44 is electrically connected to the power board 43, and the other end of the flexible board 44 is electrically connected to the flexible board pad 45. The flexible board pad 45 is electrically connected to the inter-board solder pin 32 of the acquisition and transmission circuit board 3. The antenna 46 is located on the bottom wall of the inner cavity of the upper housing 41 and is electrically connected to the power board 43. The power board 43 is located between the antenna 46 and the coil assembly 42.

[0033] The power board 43 acquires the induced voltage of the coil assembly 42 and supplies power to the acquisition and transmission circuit board 3 via the flexible board pad 45 at the end of the flexible board 44. Simultaneously, the acquisition circuit board 3 supplies power to the pressure probe 2, i.e., the conditioning circuit board 24 supplies power to the pressure core 22 and platinum resistance thermometer 23, bringing them into working condition. The connection between the flexible board pad 45 and the inter-board solder pins 32 includes not only a power supply connection but also a temperature and pressure data transmission communication connection. The interface is defined as power +, GND, and antenna interface. The temperature and pressure radio frequency signals processed by the acquisition and transmission circuit board 3 are transmitted to the antenna 46 via the flexible board pad 45. The antenna 46 is used to enhance the transmission distance of the radio frequency signals, transmitting the temperature and pressure radio frequency signals to the handheld terminal.

[0034] like Figure 3 , Figure 6As shown, housing 1 serves to connect pressure probe 2 and energy receiving and transmitting module 4. The open end of housing 1 is fitted onto the outside of the open end of outer shell 21 of pressure probe 2, and the two are fixedly connected by three countersunk screws 6. The inner edge 11 of housing 1 is fitted onto the outside of the upper housing 41 of energy receiving and transmitting module 4, so that the outwardly folded platform 411 of upper housing 41 is located inside housing 1 and is engaged with the inner edge 11 of housing 1.

[0035] Specifically, during assembly, after the energy receiving and transmitting module 4 and the pressure probe 2 are installed, the housing 1 is coaxially fitted onto the energy receiving and transmitting module 4, so that the upper housing 41 protrudes from the end where the inner edge 11 of the housing 1 is located, and the inner end face of the inner edge 11 contacts the platform 411 of the upper housing 41. Then, the open end of the housing 1 is coaxially fitted onto the open end of the outer shell 21, and the housing 1 and the outer shell 21 are fixedly connected by fasteners. Further, three axially protruding protrusions 13 are evenly distributed around the open end of the housing 1, each protrusion 13 having a through connecting hole 14. The protrusions 13 and the corresponding slots 25 around the outer shell 21 engage. The slots 25 of the outer shell 21 have first screw holes 26, which correspond one-to-one with the connecting holes 14. The housing 1 and the outer shell 21 are fixedly connected by three 90° countersunk screws 6. An annular protrusion is provided between two adjacent slots 25, which can axially limit the housing 1.

[0036] To prevent the energy receiving and transmitting module 4 from rotating inside the housing 1, a pin groove 412 is provided on the platform 411, and a pin hole 12 is provided on the inner wall of the housing 1 near the inner edge 11. The pin hole 12 is set perpendicular to the axis of the housing 1, and a pin 5 is inserted into the pin hole 12. The pin 5 is also engaged in the pin groove 412 on the platform 411, thereby preventing the upper housing 41 from rotating inside the housing 1.

[0037] To ensure airtightness of the interface between the sensor and the wheel after installation, a sealing ring 7 is fitted on the outer shell 21 of the pressure probe 2. Specifically, a sealing ring mounting groove 213 is provided at the end of the external thread 211 of the outer shell 21. The sealing ring 7 is fitted into the sealing ring mounting groove 213, which ensures airtightness after the interface between the outer shell 21 and the wheel is screwed together, thus preventing tire deflation.

[0038] To ensure the sensor functions properly and prevent external contaminants from entering, this embodiment includes a first dustproof ring 8 and a second dustproof ring 9. A first dustproof ring mounting groove 214 is provided at the end of the outer shell 21 away from the threaded end for mounting the first dustproof ring 8, which seals the mounting gap between the outer shell 21 and the housing 1. A second dustproof ring 9 is installed between the platform 411 of the upper housing 41 and the inner edge 11 of the housing 1, sealing the mounting gap between the upper housing 41 and the housing 1. The first dustproof ring 8 and the second dustproof ring 9 provide dust and water protection, ensuring the sensor functions properly and extending its service life.

[0039] In use, the sensor of this invention is installed at the corresponding interface on the wheel. When the handheld terminal device is in close contact with the energy receiving and transmitting module 4, the coil assembly 42 of the energy receiving and transmitting module 4 generates an induced voltage, which is processed into a stable power supply by the power board 43. Power is then supplied to the acquisition and transmitting circuit board 3 through the flexible board 44 and the flexible board pad 45, and then to the pressure probe 2 through the acquisition and transmitting circuit board 3, driving the acquisition and transmitting circuit board 3 and the pressure probe 2 to work. The pressure core 22 and platinum resistance 23 in the pressure probe 2 begin to collect temperature and pressure information, and the collected temperature and pressure information is amplified and processed by the conditioning circuit board 24 and then converted into I 2 The temperature and pressure signal is transmitted in C form to the acquisition and transmission circuit board 3. The temperature and pressure signal is processed into a temperature and pressure radio frequency signal by the acquisition and transmission circuit board 3, and then transmitted to the antenna 46 through the inter-board solder pins 32, the flexible board pads 45, the flexible board 44 and the power board 43. The antenna 46 can enhance the transmission effect of the wireless radio frequency signal. The temperature and pressure signal is received and displayed by the handheld terminal device.

[0040] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A wirelessly powered aircraft tire temperature and pressure sensor, characterized in that, The device includes a housing with a pressure probe mounted at one end and an energy receiving and transmitting module mounted at the other end. The pressure probe contains a data acquisition and transmission circuit board, which is electrically connected to both the pressure probe and the energy receiving and transmitting module. The energy receiving and transmitting module includes an antenna. The pressure probe is used to collect temperature and pressure information inside the aircraft tires and transmit the collected temperature and pressure information to the acquisition and transmission circuit board. The acquisition and transmission circuit board is used to process the temperature and pressure information collected by the pressure probe and convert it into a temperature and pressure radio frequency signal, which is then transmitted to the energy receiving and transmitting module. The energy receiving and transmitting module is used to generate an induced voltage by electromagnetic induction with the handheld terminal to power the pressure probe and the acquisition and transmission circuit board, and wirelessly transmits the temperature and pressure radio frequency signal processed by the acquisition and transmission circuit board to the handheld terminal through its internal antenna. The pressure probe includes: The outer casing has an external thread at one end for connection with the corresponding interface thread on the wheel; the other end is open and the open end of the outer casing is fixedly connected to the housing; the inner cavity of the outer casing is divided into a high-pressure chamber and an atmospheric pressure chamber by a partition; an air inlet is provided on the outer end face of the outer casing facing its open end, and the air inlet is connected to the high-pressure chamber of the outer casing. Both the pressure core and the platinum resistance thermometer are installed inside the high-pressure chamber of the housing; the pressure core is used to sense the gas pressure information entering the high-pressure chamber through the air inlet; the platinum resistance thermometer is used to sense the temperature information of the gas entering the high-pressure chamber through the air inlet. The conditioning circuit board is installed in the atmospheric pressure chamber inside the outer shell and is electrically connected to the output end of the pressure core and the output end of the platinum resistance thermometer, and is also electrically connected to the acquisition and transmission circuit board. The conditioning circuit board is used to acquire temperature and pressure information, amplify it, and transmit the amplified temperature and pressure information to the acquisition and transmission circuit board. The acquisition and transmission circuit board is installed in the atmospheric pressure chamber of the outer shell. A cover plate covers the conditioning circuit board and is welded to the outer shell. The acquisition and transmission circuit board is fixed on the cover plate. The acquisition and transmission circuit board has multiple insertion holes for corresponding connection with multiple welding pins on the conditioning circuit board. The cover plate has through holes for the welding pins to pass through. The acquisition and transmission circuit board is electrically connected to the energy receiving and transmitting module. The energy receiving and transmitting module includes: The upper shell has an open end, and the open end of the upper shell is provided with an outwardly folded platform around its perimeter for engaging with one end of the shell. The coil assembly, installed inside the upper housing, is used to obtain the induced voltage; The power board, installed inside the upper housing, is electrically connected to the coil assembly and is used to process the induced voltage into a stable power supply; the antenna is installed inside the upper housing and is electrically connected to the power board. And a flexible board, one end of which is electrically connected to the power board, and the other end is electrically connected to the flexible board pads. The flexible board pads are connected to the inter-board solder pins set on the acquisition and transmission circuit board. The power board supplies power to the acquisition and transmission circuit board and pressure probe through flexible board pads, and transmits the temperature and pressure radio frequency signals processed by the acquisition and transmission circuit board to the antenna. The antenna is used to amplify the temperature and pressure radio frequency signals and send them to the handheld terminal. One end of the housing is open, and the open end of the housing is fitted onto the outside of the open end of the outer shell and fixedly connected to the outer shell by fasteners; the other end of the housing has an opening, and an inner edge is formed around the opening. The open end of the upper housing is fitted into the housing, and its outwardly folded platform engages with the inner edge of the housing.

2. The wirelessly powered aircraft tire temperature and pressure sensor according to claim 1, characterized in that, The platform is provided with a pin groove, and the inner wall of the housing near the inner edge is provided with a pin hole, which is perpendicular to the axis of the housing. A pin is inserted into the pin hole and is simultaneously engaged in the pin groove on the platform. The pin is used to prevent the upper housing from rotating inside the housing.

3. The wirelessly powered aircraft tire temperature and pressure sensor according to claim 1, characterized in that, The open end of the housing has multiple axially protruding protrusions evenly distributed around its perimeter. The protrusions are engaged with corresponding slots on the perimeter of the housing, and the housing is fixedly connected to the outer shell by countersunk screws.

4. The wirelessly powered aircraft tire temperature and pressure sensor according to claim 1, characterized in that, A first dustproof ring mounting groove is provided at the end of the outer shell away from the threaded end, and a first dustproof ring is installed in the first dustproof ring mounting groove. The first dustproof ring is used to seal the installation gap between the outer shell and the housing. A second dustproof ring is installed between the platform of the upper housing and the inner edge of the housing. The second dustproof ring is used to seal the installation gap between the upper housing and the housing.

5. The wirelessly powered aircraft tire temperature and pressure sensor according to claim 1, characterized in that, A sealing ring mounting groove is provided at the end of the external thread of the outer shell. The sealing ring is fitted into the sealing ring mounting groove and is used for air sealing after the interface between the outer shell and the wheel is screwed together.

6. The wirelessly powered aircraft tire temperature and pressure sensor according to claim 1, characterized in that, A fluoroplastic film is provided on the cover plate inside the housing. The fluoroplastic film is sandwiched between the cover plate and the acquisition and transmission circuit board, and the fluoroplastic film serves to insulate the acquisition and transmission circuit board.

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