Wireless power supply type aircraft tire temperature and pressure sensor

Abstract

The invention discloses a wireless power supply type aircraft tire temperature and pressure sensor, and belongs to the field of aircraft wheel tire pressure monitoring. The sensor comprises a shell, one end of the shell is provided with a pressure probe, and the other end is provided with an energy receiving-transmitting module. An acquisition and transmission circuit board is arranged in the pressure probe; and an antenna is arranged in the energy receiving and transmitting module. The pressure probe is used for collecting temperature and pressure information in an aircraft tire and transmitting the information to the collecting and transmitting circuit board; the collecting and transmitting circuit board is used for processing the temperature and pressure information, converting the temperature and pressure information into temperature and pressure radio frequency signals and transmitting the signals to the energy receiving and transmitting module; and the energy receiving and transmitting module is used for performing electromagnetic induction with the handheld terminal to generate induced voltage, supplying power to the pressure probe and the collecting and transmitting circuit board, and wirelessly transmitting a temperature and pressure radio frequency signal to the handheld terminal through an internal antenna of the energy receiving and transmitting module. The sensor is fixed at a corresponding interface of the airplane wheel and does not need to be disassembled in the using process, and airplane wheel pressure and temperature monitoring can be carried out on the ground through a handheld terminal.

Description

Technical Field

[0001] The present invention relates to the field of aircraft wheel and tire pressure monitoring, and in particular to a wireless power supply type aircraft tire temperature and pressure sensor. Background Art

[0002] To ensure aircraft safety, it is crucial to monitor aircraft tire temperature and tire pressure before takeoff, so that abnormal situations can be handled promptly and ensure smooth taxiing during takeoff and landing.

[0003] Currently, aircraft tire pressure and temperature monitoring devices are generally connected to the aircraft, and the onboard power supply provides power to the monitoring devices. In order to realize the function of displaying tire temperature and tire pressure on the onboard interface, the products that need to be installed 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 onboard computer. This configuration requires more space resources on the aircraft, and laying cables also increases the weight of the aircraft and the complexity of the aircraft power supply system.

[0004] Aircraft tire temperature and tire pressure data are also of great significance for ground maintenance personnel to monitor the status of the wheels. Generally, tire pressure data is monitored on the ground by installing a pressure gauge on the valve core of the wheel tire. However, the operation is relatively cumbersome, and the process of removing and installing the pressure gauge will inevitably result in momentary air leakage. In addition, tire temperature monitoring of the wheel is also very important and can provide an auxiliary reference for wheel status assessment. Due to the lack of easy-to-operate tire temperature monitoring equipment, tire temperature monitoring is often neglected during ground maintenance. Due to the inconvenience of existing ground monitoring of aircraft tire pressure, for aircraft with onboard tire pressure monitoring function, ground maintenance personnel generally go back and forth in the cockpit to read the aircraft tire temperature and tire pressure information on the aircraft cockpit display interface; for models without onboard tire pressure monitoring function, ground pressure gauges are still required to be installed and removed for tire pressure monitoring.

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

[0006] Technical issues to be solved: To overcome the shortcomings of the prior art, the present 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 the temperature and pressure information collected by the pressure probe is wirelessly transmitted to a handheld terminal in a radio frequency manner. The sensor does not need to be disassembled during use, thereby solving the problem of inconvenience in monitoring aircraft tire pressure and temperature on the ground in the prior art.

[0007] The technical solution of the present invention is: a wirelessly powered aircraft tire temperature and pressure sensor, comprising a housing, one end of which is mounted a pressure probe, and the other end of which is mounted an energy receiving and transmitting module; a data acquisition and transmitting circuit board is mounted within the pressure probe, the data acquisition and transmitting circuit board is electrically connected to the pressure probe and to the energy receiving and transmitting module; the energy receiving and transmitting module is provided with an antenna; Among them, the pressure probe is used to collect the temperature and pressure information inside the aircraft tire, 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, convert it into a temperature and pressure radio frequency signal and transmit it to the energy receiving and transmitting module; the energy receiving and transmitting module is used to perform electromagnetic induction with the handheld terminal to generate an induced voltage, power the pressure probe and the acquisition and transmission circuit board, and wirelessly transmit 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 comprises: The outer shell has an external thread at one end for threaded connection with a corresponding interface provided on the wheel; the other end is open, and the open end of the outer shell is fixedly connected to the shell; the inner cavity of the outer shell is divided into a high-pressure cavity and a normal-pressure cavity by a partition; the outer end surface of the outer shell facing the open end is provided with an air inlet, and the air inlet is connected to the high-pressure cavity of the outer shell; The pressure core and platinum resistor are both installed in the high-pressure chamber of the shell; the pressure core is used to sense the pressure information of the gas entering the high-pressure chamber from the air inlet; the platinum resistor is used to sense the temperature information of the gas entering the high-pressure chamber from the air inlet; And a conditioning circuit board is installed in the normal pressure cavity of the inner cavity of the shell, and is electrically connected to the output end of the pressure core and the output end of the platinum resistor, and is electrically connected to the acquisition and transmission circuit board; the conditioning circuit board is used to obtain temperature and pressure information for amplification processing, 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: the acquisition and transmission circuit board is installed in the normal pressure cavity of the shell, and a cover plate is covered on the conditioning circuit board, the cover plate is welded and fixed to the shell, and the acquisition and transmission circuit board is fixedly connected to the cover plate; a plurality of plug-in holes are provided on the acquisition and transmission circuit board for corresponding connection with a plurality of soldering pins provided on the conditioning circuit board, and a through hole is provided on the cover plate for the soldering pins to pass through; the acquisition and transmission circuit board is electrically connected to the energy receiving and transmitting module.

[0010] A further technical solution of the present invention is: the energy receiving and transmitting module includes: An upper shell body, one end of which is open, and an outward-turned platform is provided around the open end of the upper shell body for clamping with one end of the shell body; A coil assembly is installed inside the upper housing and is used to obtain an induced voltage; A power board is installed inside the upper housing and is electrically connected to the coil assembly, and is used to process the induced voltage into a stable power supply; an 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 of which is electrically connected to the flexible board pad, and the flexible board pad is connected to the inter-board welding pin provided on the acquisition and transmission circuit board; Among them, the power board supplies power to the acquisition and transmission circuit board and pressure probe through the flexible board pad, and transmits the temperature and pressure RF signal processed by the acquisition and transmission circuit board to the antenna. The antenna is used to enhance the temperature and pressure RF signal and send it 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 sleeved on the outside of 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 circumference of the opening forms an inner edge, the open end of the upper shell is sleeved in the shell, and its outward-turned platform is snap-fitted 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 shell near the inner edge, and the pin hole is perpendicular to the axis of the shell; a pin is inserted in the pin hole, and the pin is simultaneously engaged in the pin groove on the platform, and the pin is used to prevent the upper shell from rotating inside the shell.

[0013] A further technical solution of the present invention is that a plurality of axially outwardly protruding portions are evenly distributed around the open end of the shell, the protruding portions are clamped with corresponding notches arranged around the shell, and the shell is fixedly connected to the shell by countersunk screws.

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

[0015] A further technical solution of the present invention is that a sealing ring installation groove is provided at the external threaded tail end of the shell, the sealing ring is sleeved in the sealing ring installation groove, and the sealing ring is used for airtight sealing after the shell and the interface on the wheel are screwed together.

[0016] A further technical solution of the present invention is: a fluoroplastic film is provided on the cover plate inside the shell, the fluoroplastic film is sandwiched between the cover plate and the acquisition and transmission circuit board, and the fluoroplastic film has an insulating effect on the acquisition and transmission circuit board.

[0017] The beneficial effects of the present invention are as follows: a wirelessly powered aircraft tire temperature and pressure sensor is provided. It monitors tire pressure by installing a pressure core within the housing of a pressure probe, monitors tire temperature by installing a platinum resistor, and amplifies the monitored temperature and pressure information via a conditioning circuit board before sending it to a collection and transmission circuit board for processing. The collection 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 temperature and pressure radio frequency signal is then fed back to a handheld terminal via an antenna within the energy receiving and transmitting module. Furthermore, the energy receiving and transmitting module is provided with a coil assembly and a power supply board. The power supply board is electrically connected to the inter-board solder pins of the collection and transmission circuit board via a flexible board and flexible board pads. The coil assembly generates an induced voltage and supplies electrical energy to the collection and transmission circuit board and the pressure probe, achieving wireless power supply for the sensor and transmitting the temperature and pressure radio frequency signal to the antenna for transmission to the handheld terminal. Therefore, the sensor only needs to be installed on the aircraft wheel, without requiring connection to other onboard functional devices or onboard power cables. It only requires a ground-based handheld terminal device for power and communication, facilitating ground access to temperature and pressure data of aircraft tires. It avoids the cumbersome wiring caused by wired connection with onboard equipment, saves space, and avoids the inconvenience caused by ground crew going back and forth to the cockpit to check temperature and pressure data.

[0018] The structure of the present invention is battery-free and is powered by wireless energy transmission, which breaks through the limitations of battery power supply and improves product safety in high-temperature and low-temperature environments.

[0019] The temperature and pressure sensor of the present invention is installed in a corresponding interface on the wheel, threadedly connected to the wheel, and airtightly connected to the tire cavity via a sealing ring. It does not need to be removed for use and maintenance, and does not affect wheel and tire replacement. The threaded connection to the interface facilitates the sensor's installation and removal, requiring no special tools and facilitating maintenance and replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

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

[0022] Figure: 1. Housing, 11. Inner edge, 12. Pin hole, 13. Protrusion, 14. Connecting hole, 2. Pressure probe, 21. Housing, 211. External thread, 212. Air inlet, 213. Sealing ring mounting groove, 214. First dust ring mounting groove, 215. Partition, 216. Cover, 22. Pressure core, 23. Platinum resistor, 24. Conditioning circuit board, 241. Solder pin, 25. Notch, 26. First screw hole, 27. Second screw hole Hole, 3. Collection and transmission circuit board, 31. Plug-in hole, 32. Inter-board solder pin, 33. Screw hole, 34. Cylindrical head screw, 4. Energy receiving and transmitting module, 41. Upper shell, 411. Platform, 412. Pin slot, 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 dust ring, 9 Second dust ring, 10. Fluoroplastic film. DETAILED DESCRIPTION

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

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

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

[0026] Among them, the pressure probe 2 is used to collect the temperature and pressure information inside the aircraft tire, and transmit the collected temperature and pressure information to the collection and transmission circuit board 3; the collection and transmission circuit board 3 is used to perform data analysis 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 perform electromagnetic induction with the handheld terminal to generate an induced voltage, power the pressure probe 2 and the collection and transmission circuit board 3, and wirelessly transmit the temperature and pressure radio frequency signal processed by the collection and transmission circuit board 3 to the handheld terminal through its internal antenna 46.

[0027] For details, see Figure 4 、 Figure 5 The pressure probe 2 comprises a housing 21, a pressure core 22, a platinum resistor 23, and a conditioning circuit board 24. The housing 21 is a shell structure with one open end and multiple air inlets 212 at the other. The interior of the housing 21 is axially divided into two 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 high-pressure chamber is from the air inlet 212 to the partition 215, while the normal-pressure chamber is from the partition 215 to the open end of the housing 21. The air inlet 212 connects to the high-pressure chamber. External threads 211 are provided on the outer diameter wall of the housing where the air inlet 212 is located. These threads are used to threadably connect the housing 21 to the corresponding interface on the wheel. The open end of the housing 21 is fixedly connected to the casing 1. When the housing and the interface on the wheel are properly installed, the air inlet 212 connects the high-pressure chamber of the housing 21 with the inner cavity of the wheel tire, allowing gas from the tire to enter the high-pressure chamber of the housing 21 through the air inlet 212.

[0028] The pressure core 22 and the platinum resistor 23 are both installed in the high-pressure chamber of the shell 21 by welding. The pressure core 22 is used to sense the pressure information of the gas entering the high-pressure chamber through the air inlet 212; the platinum resistor 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 within the atmospheric chamber of the housing 21. It is electrically connected to the output of the pressure core 22 and the output of the platinum resistor 23. The pressure core 22 and the platinum resistor 23 transmit signals to the conditioning circuit board 24 via wire bonds. The conditioning circuit board 24 is also electrically connected to the acquisition and transmission circuit board 3. Four solder pins 241 are provided on the conditioning circuit board 24 for connecting to corresponding plug-in holes 31 on the acquisition and transmission circuit board 3. These four pins 241 are designated as P1 (Power+), P2 (Power-), P3 (SCL (Clock), and P4 (SDA). These pins are soldered to corresponding plug-in holes 31 on the acquisition and transmission circuit board 3. The conditioning circuit board 24 acquires pressure data sensed by the pressure core 22 and temperature data sensed by the platinum resistor 23. Specifically, it acquires the temperature and pressure information within the tire collected by the pressure core 22 and the platinum resistor 23, amplifies this information, and transmits it to the acquisition and transmission circuit board 3 via the solder pins 241. The conditioning circuit board 24 also delivers power to the pressure core 22 and platinum resistor 23, transferring the electrical energy supplied by the energy receiving and transmitting module 4 to the collection and transmission circuit board 3. A cover plate 216 is mounted directly above the conditioning circuit board 24. The cover plate 213 is welded to the housing 21. Four solder pins 241 extend through corresponding holes in the cover plate 216 and are soldered to corresponding plug-in holes 31 on the collection and transmission circuit board 3.

[0030] like Figure 2 、 Figure 3 、 Figure 8 As shown, the acquisition and transmission circuit board 3 is installed within the atmospheric pressure chamber of the housing 21. It primarily analyzes the temperature and pressure information transmitted by the pressure probe 2 and transmits it to the energy transmission and reception module 4. Simultaneously, the acquisition and transmission circuit board 3 receives power from the energy transmission and reception module 4 and also transmits power to the pressure probe 2. Specifically, the acquisition and transmission circuit board 3 is mounted on the cover plate 216 of the housing 21. Two screw holes 33 are provided on the acquisition and transmission circuit board 3, which are secured to corresponding second screw holes 27 in the housing 21 via two cylindrical head screws 34 passing through the screw holes 33. Four plug-in holes 31 are provided on the acquisition and transmission circuit board 3, corresponding to the four solder pins 241 on the conditioning circuit board 24. Soldering pads are used to electrically connect the acquisition and transmission circuit board 3 and the conditioning circuit board 24. The definition of the four plug-in holes 31 matches the pin assignment of the four solder pins 241. Inter-board solder pins 32 are provided on the acquisition and transmission circuit board 3 for electrically connecting the acquisition and transmission circuit board 3 to the energy transmission and reception module 4.

[0031] like Figure 2As shown, in order to achieve isolation of the acquisition and transmission circuit board 3, a fluoroplastic film 10 is installed on the cover plate 216 of the inner cavity of the shell 21. The fluoroplastic film 10 is located between the cover plate 216 of the inner cavity of the shell 21 and the acquisition and transmission circuit board 3. The fluoroplastic film 10 isolates the shell 21 from the acquisition and transmission circuit board 3, and isolates the cover plate 216 from the acquisition and transmission circuit board 3. The fluoroplastic film 10 provides insulation and 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 shell 41, a coil assembly 42, a power board 43, a flexible board 44, a flexible board pad 45, and an antenna 46. The upper shell 41 is a cap-shaped structure with one end open. The open end is surrounded by an outward-turned platform 411. The platform 411 is used to mate with the inner edge 11 of the opening at one end of the shell 1. The coil assembly 42, power board 43, and antenna 46 are all installed in the inner cavity of the upper shell 41. The coil assembly 42 is used to generate electromagnetic induction with the coil assembly in the external handheld terminal. The coil assembly 42 acts as a receiving coil and cooperates with the drive coil of the handheld terminal to obtain an induced voltage. Under the action 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, it generates electrical energy that can 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, 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 welding 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 shell 41, and is electrically connected to the power board 43, and the power board 43 is located between the antenna 46 and the coil assembly 42.

[0033] The power board 43 captures the induced voltage from 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. This power is also supplied to the pressure probe 2 via the acquisition circuit board 3, which in turn supplies power to the pressure core 22 and platinum resistor 23 via the conditioning circuit board 24, putting them into operation. The connection between the flexible board pad 45 and the inter-board solder pin 32 includes not only a power supply connection but also a temperature and pressure data transmission communication connection. The interfaces are defined as power +, GND, and an antenna interface. The temperature and pressure RF signals processed by the acquisition and transmission circuit board 3 are transmitted to the antenna 46 via the flexible board pad 45. Antenna 46 is used to enhance the transmission distance of the RF signal and transmit it to the handheld terminal.

[0034] like Figure 3 、 Figure 6As shown, the housing 1 connects the pressure probe 2 and the energy transceiver module 4. The open end of the housing 1 fits over the open end of the outer shell 21 of the pressure probe 2, and the two are fixed together using three countersunk screws 6. The inner edge 11 of the housing 1 fits over the outer surface of the upper housing 41 of the energy transceiver module 4, so that the outward-facing platform 411 of the upper housing 41 is located within the housing 1 and engages with the inner edge 11 of the 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 over the energy receiving and transmitting module 4, with the upper housing 41 extending from the end where the inner edge 11 of the housing 1 is located, and the inner end surface of the inner edge 11 contacts the platform 411 of the upper housing 41. The open end of the housing 1 is then coaxially fitted over the open end of the outer shell 21, and the housing 1 and the outer shell 21 are securely connected using fasteners. Furthermore, three axially outwardly projecting protrusions 13 are evenly distributed around the open end of the housing 1, each of which is provided with a through-hole 14. The protrusions 13 engage with corresponding notches 25 provided around the outer shell 21. The notches 25 of the outer shell 21 are provided with first screw holes 26, which correspond one-to-one with the connection holes 14. The housing 1 and the outer shell 21 are securely connected using three 90° countersunk screws 6. An annular protrusion is provided between two adjacent notches 25 to provide axial positioning for the housing 1.

[0036] In order to prevent the energy receiving and transmitting module 4 from rotating in the shell 1, a pin groove 412 is provided on the platform 411, and a pin hole 12 is provided on the inner wall of the shell 1 near the inner edge 11. The pin hole 12 is arranged perpendicular to the axis of the shell 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 shell 41 from rotating in the shell 1.

[0037] In order to ensure the airtightness of the interface between the sensor and the wheel after installation, a sealing ring 7 is installed on the outer shell 21 of the pressure probe 2. Specifically, a sealing ring installation groove 213 is provided at the tail end of the external thread 211 of the shell 21. The sealing ring 7 is inserted into the sealing ring installation groove 213, ensuring the airtightness of the interface between the shell 21 and the wheel after being screwed together, thereby avoiding tire deflation.

[0038] To ensure proper function of the sensor and prevent the ingress of external debris, the sensor of this embodiment also includes a first dust ring 8 and a second dust ring 9. A first dust ring mounting groove 214 is provided at the end of the housing 21, distal from the threaded end, for mounting the first dust ring 8. The first dust ring 8 seals the installation gap between the housing 21 and the shell 1. A second dust ring 9 is installed between the platform 411 of the upper shell 41 and the inner edge 11 of the shell 1. The second dust ring 9 seals the installation gap between the upper shell 41 and the shell 1. The first and second dust rings 8 and 9 provide dust and water resistance, ensuring the proper function of the sensor and extending its service life.

[0039] When in use, the sensor of the present invention is installed at the corresponding interface on the wheel. When the handheld terminal device is close to the energy receiving and transmitting module 4, the coil component 42 of the energy receiving and transmitting module 4 generates an induced voltage, which is processed into a stable power supply by the power supply board 43, and then the collection and transmission circuit board 3 is powered through the flexible board 44 and the flexible board pad 45. Then, the pressure probe 2 is powered through the collection and transmission circuit board 3, driving the collection and transmission circuit board 3 and the pressure probe 2 to work. The pressure core 22 and the platinum resistor 23 in the pressure probe 2 start to collect temperature and pressure information, and the collected temperature and pressure information is amplified and processed by the conditioning circuit board 24 to be output as I 2 The temperature and pressure signals are transmitted to the acquisition and transmission circuit board 3 in C form. The acquisition and transmission circuit board 3 analyzes and processes the temperature and pressure signals into temperature and pressure radio frequency signals, which are then transmitted to the antenna 46 via 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 signals are 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 in the scope of protection of the present invention.

Claims

1. A wireless powered aircraft tire temperature and pressure sensor, characterized in that: It includes a housing, one end of which is equipped with a pressure probe, and the other end is equipped with an energy receiving and transmitting module; the pressure probe is internally equipped with an acquisition and transmitting circuit board, which is electrically connected to the pressure probe and the energy receiving and transmitting module; the energy receiving and transmitting module is provided with an antenna; Among them, the pressure probe is used to collect the temperature and pressure information inside the aircraft tire, 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, convert it into a temperature and pressure radio frequency signal and transmit it to the energy receiving and transmitting module; the energy receiving and transmitting module is used to perform electromagnetic induction with the handheld terminal to generate an induced voltage to power the pressure probe and the acquisition and transmission circuit board, and wirelessly transmit the temperature and pressure radio frequency signal processed by the acquisition and transmission circuit board to the handheld terminal through its internal antenna.

2. The wireless powered aircraft tire temperature and pressure sensor according to claim 1, characterized in that: The pressure probe comprises: The outer shell has an external thread at one end for threaded connection with a corresponding interface provided on the wheel; the other end is open, and the open end of the outer shell is fixedly connected to the shell; the inner cavity of the outer shell is divided into a high-pressure cavity and a normal-pressure cavity by a partition; the outer end surface of the outer shell facing the open end is provided with an air inlet, and the air inlet is connected to the high-pressure cavity of the outer shell; The pressure core and platinum resistor are both installed in the high-pressure chamber of the shell; the pressure core is used to sense the pressure information of the gas entering the high-pressure chamber from the air inlet; the platinum resistor is used to sense the temperature information of the gas entering the high-pressure chamber from the air inlet; And a conditioning circuit board is installed in the normal pressure cavity of the inner cavity of the shell, and is electrically connected to the output end of the pressure core and the output end of the platinum resistor, and is electrically connected to the acquisition and transmission circuit board; the conditioning circuit board is used to obtain temperature and pressure information for amplification processing, and transmit the amplified temperature and pressure information to the acquisition and transmission circuit board.

3. The wireless powered aircraft tire temperature and pressure sensor according to claim 2, wherein: The acquisition and transmission circuit board is installed in the normal pressure cavity of the shell, and a cover plate is covered on the conditioning circuit board. The cover plate is welded and fixed to the shell, and the acquisition and transmission circuit board is fixed on the cover plate; a plurality of plug-in holes are provided on the acquisition and transmission circuit board for corresponding connection with a plurality of soldering pins provided on the conditioning circuit board, and a through hole is provided on the cover plate for the soldering pins to pass through; the acquisition and transmission circuit board is electrically connected to the energy receiving and transmitting module.

4. The wireless powered aircraft tire temperature and pressure sensor according to claim 2, wherein: The energy receiving and sending module includes: An upper shell body, one end of which is open, and an outward-turned platform is provided around the open end of the upper shell body for clamping with one end of the shell body; A coil assembly is installed inside the upper housing and is used to obtain an induced voltage; A power board is installed inside the upper housing and is electrically connected to the coil assembly, and is used to process the induced voltage into a stable power supply; an 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 of which is electrically connected to the flexible board pad, and the flexible board pad is connected to the inter-board welding pin provided on the acquisition and transmission circuit board; Among them, the power board supplies power to the acquisition and transmission circuit board and pressure probe through the flexible board pad, and transmits the temperature and pressure RF signal processed by the acquisition and transmission circuit board to the antenna. The antenna is used to enhance the temperature and pressure RF signal and send it to the handheld terminal.

5. The wireless power supply aircraft tire temperature and pressure sensor according to claim 4, characterized in that: One end of the shell is open, and the open end of the shell is sleeved on the outside of the open end of the outer shell and fixedly connected to the outer shell by fasteners; the other end of the shell is provided with an opening, and the circumference of the opening forms an inner edge, and the open end of the upper shell is sleeved in the shell, and its outward-turned platform is snap-fitted with the inner edge of the shell.

6. The wireless power supply aircraft tire temperature and pressure sensor according to claim 5, characterized in that: A pin groove is provided on the platform, and a pin hole is provided on the inner wall of the shell near the inner edge, which is perpendicular to the axis of the shell; a pin is inserted in the pin hole, and the pin is simultaneously engaged in the pin groove on the platform, and the pin is used to prevent the upper shell from rotating in the shell.

7. The wireless power supply aircraft tire temperature and pressure sensor according to claim 4, characterized in that: The open end of the shell is evenly distributed around a plurality of protrusions protruding outward in the axial direction. The protrusions are clamped with corresponding notches arranged around the shell, and the shell is fixedly connected to the shell by countersunk screws.

8. The wireless power supply aircraft tire temperature and pressure sensor according to claim 4, characterized in that: A first dust ring mounting groove is provided at the end of the outer shell away from the threaded end, and a first dust ring is installed in the first dust ring mounting groove. The first dust ring is used to seal the mounting gap between the outer shell and the shell; a second dust ring is installed between the platform of the upper shell and the inner edge of the shell. The second dust ring is used to seal the mounting gap between the upper shell and the shell.

9. The wireless powered aircraft tire temperature and pressure sensor according to claim 2, wherein: A sealing ring installation groove is provided at the external threaded tail end of the shell, and the sealing ring is sleeved in the sealing ring installation groove. The sealing ring is used for air sealing after the shell and the interface on the wheel are screwed together.

10. The wireless power supply aircraft tire temperature and pressure sensor according to claim 2, characterized in that: A fluoroplastic film is provided on the cover plate inside the shell and is sandwiched between the cover plate and the collection and transmission circuit board. The fluoroplastic film plays an insulating role for the collection and transmission circuit board.

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