Two-wheeled vehicle tire pressure monitor self-power generation system and two-wheeled vehicle

Abstract

The application provides a two-wheeled vehicle tire pressure monitor self-power generation system and a two-wheeled vehicle, and relates to the technical field of two-wheeled vehicles.The two-wheeled vehicle tire pressure monitor self-power generation system provided by the application comprises an axle, a wheel hub, a tire pressure monitor, a permanent magnet, a coil and a wire; the axle is installed on a frame of the two-wheeled vehicle; the wheel hub is rotatably installed on the axle through a bearing; the tire pressure monitor is fixed on the wheel hub and is used for detecting the air pressure inside a tire of the two-wheeled vehicle; the permanent magnet is arranged on the axle; the coil is arranged on the wheel hub; the wire is electrically connected between the coil and the tire pressure monitor; when the wheel hub rotates, the coil is configured to generate electricity by cutting the magnetic field of the permanent magnet and supply power to the tire pressure monitor through the wire.The two-wheeled vehicle tire pressure monitor self-power generation system and the two-wheeled vehicle can improve the service life of the tire pressure monitor.

Description

Technical Field

[0001] This application relates to the field of two-wheeled vehicle technology, and more particularly to a self-generating system for a two-wheeled vehicle tire pressure monitoring device and a two-wheeled vehicle. Background Technology

[0002] With the widespread use of two-wheeled vehicles such as electric scooters, balance bikes, and electric two-wheelers, their small-diameter tires, due to their limited volume, have a relatively high leakage rate and are prone to underinflation. Currently, the industry typically addresses this issue by installing tire pressure monitoring systems (TPMS). However, due to the limited space inside the tire, the battery size of the compatible built-in TPMS is limited, resulting in lower battery capacity and a limited lifespan for the TPMS, posing a risk of failure throughout the vehicle's entire lifespan. Utility Model Content

[0003] To address at least one of the problems mentioned in the background art, this application provides a self-generating system for a two-wheeled vehicle tire pressure monitoring system and a two-wheeled vehicle, which can improve the service life of the tire pressure monitoring system.

[0004] To achieve the above objectives, this application provides the following technical solution:

[0005] In a first aspect, this application provides a self-generating system for a two-wheeled vehicle tire pressure monitoring device, comprising:

[0006] Axle, mounted on the frame of a two-wheeled vehicle;

[0007] The hub is rotatably mounted on the axle via bearings;

[0008] Tire pressure monitoring system, fixed to the wheel hub, is used to detect the air pressure inside the tires of two-wheeled vehicles;

[0009] Permanent magnet, mounted on the wheel axle;

[0010] The coil is mounted on the wheel hub;

[0011] A wire is electrically connected between the coil and the tire pressure monitor;

[0012] When the wheel hub rotates, the coil is configured to generate electricity by cutting the magnetic field of the permanent magnet and supply power to the tire pressure monitor through the wires.

[0013] As an alternative implementation, the hub includes a center disc, spokes, and a rim. The center disc is rotatably mounted on the axle via bearings. The spokes are radially connected to the center disc, and the rim is connected to the spokes. A coil is disposed on the center disc and surrounds the outer periphery of the permanent magnet.

[0014] As an alternative implementation, the permanent magnet and the coil are located outside or inside the central disk.

[0015] As an alternative implementation, the wheel hub has a boss, and the tire pressure monitoring device has a slot that engages with the boss.

[0016] Alternatively, the wheel hub has a mounting slot in which the tire pressure monitoring system is installed.

[0017] As an optional implementation, a threaded connector is also included, through which the tire pressure monitor is fixed to the boss or in the mounting groove.

[0018] As an alternative implementation, the rim has an annular groove in its circumference, and the tire pressure monitoring device is disposed in the annular groove.

[0019] As an alternative implementation, the rim has a wire guide hole through which the wire passes.

[0020] As an alternative implementation, the conductor extends along the spokes.

[0021] As an alternative implementation, the spokes have grooves in which the conductors are disposed.

[0022] Secondly, this application also provides a two-wheeled vehicle, including the two-wheeled vehicle tire pressure monitoring self-generating system of the first aspect.

[0023] The self-generating system for a two-wheeled vehicle tire pressure monitoring system provided in this application includes an axle, a hub, a tire pressure monitoring system, a permanent magnet, a coil, and wires. The axle is mounted on the frame of the two-wheeled vehicle. The hub is rotatably mounted on the axle via bearings. The tire pressure monitoring system is fixed to the hub and is used to detect the internal air pressure of the two-wheeled vehicle tires. The permanent magnet is disposed on the axle. The coil is disposed on the hub. The wires are electrically connected between the coil and the tire pressure monitoring system. When the hub rotates, the coil is configured to generate electricity by cutting the magnetic field of the permanent magnet and supply power to the tire pressure monitoring system through the wires.

[0024] The self-generating power system for a two-wheeled vehicle tire pressure monitoring system provided in this application involves mounting an axle on the vehicle frame, placing a permanent magnet on the axle, and rotatably mounting the tire pressure monitoring system (TPMS) to the axle via bearings. A coil is then fixed to the tire pressure monitoring system on the hub, and wires electrically connect the coil and the TPMS. When the hub rotates, the coil cuts the magnetic field of the permanent magnet to generate electricity, which is then supplied to the TPMS via the wires. This allows for a continuous supply of power to the TPMS while the two-wheeled vehicle is in motion, preventing TPMS failure due to insufficient power. This effectively solves the technical problem of low battery capacity and limited lifespan of built-in TPMS in existing technologies due to limited internal tire space, significantly improving the lifespan of the TPMS. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this application 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 some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the overall structure of the self-generating system for a two-wheeled vehicle tire pressure monitor provided in an embodiment of this application.

[0027] Figure 2 for Figure 1 The main view;

[0028] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0029] Figure 4 An exploded view of the self-generating system of the tire pressure monitoring device for two-wheeled vehicles provided in the embodiments of this application;

[0030] Figure 5 This is a schematic diagram of a tire pressure monitor in a self-generating system for a two-wheeled vehicle tire pressure monitor provided in an embodiment of this application.

[0031] Explanation of reference numerals in the attached figures:

[0032] 100-Two-wheeled vehicle tire pressure monitoring self-generating system;

[0033] 110-Wheel axle;

[0034] 120-Wheel;

[0035] 121 - Central plate;

[0036] 122-spokes;

[0037] 1221 - Cable tray;

[0038] 123 - Wheel rim;

[0039] 1231 - Annular groove;

[0040] 1232 - Cable guide hole;

[0041] 124 - Boss;

[0042] 130 - Tire Pressure Monitoring System;

[0043] 131 - Card slot;

[0044] 140 - Permanent magnet;

[0045] 150-coil;

[0046] 160-Wire;

[0047] 170 - Threaded connector. Detailed Implementation

[0048] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0049] In this application, the terms “upper,” “lower,” “left,” “right,” “front,” “back,” “top,” “bottom,” “inner,” “outer,” “vertical,” “horizontal,” “lateral,” and “longitudinal” indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to be constructed and operated in a specific orientation.

[0050] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0051] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0052] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, components, or parts (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, components, or parts. Unless otherwise stated, "a plurality of" means two or more.

[0053] With the widespread use of two-wheeled vehicles such as electric scooters, balance bikes, and electric two-wheelers, their small-diameter tires, due to their limited volume, have a relatively high leakage rate and are prone to underinflation. Currently, tire pressure monitoring systems (TPMS) are commonly used to address this issue. However, due to the limited space inside the tire, the battery size of the compatible built-in TPMS is limited, resulting in lower battery capacity and consequently a limited lifespan for the TPMS.

[0054] In view of this, this application provides a self-generating power system for a two-wheeled vehicle tire pressure monitoring system, including an axle, a hub, a tire pressure monitoring system, a permanent magnet, a coil, and wires. The axle is mounted on the frame of the two-wheeled vehicle. The hub is rotatably mounted on the axle via bearings. The tire pressure monitoring system is fixed to the hub and is used to detect the internal air pressure of the two-wheeled vehicle's tires. The permanent magnet is disposed on the axle. The coil is disposed on the hub. The wires are electrically connected between the coil and the tire pressure monitoring system. When the hub rotates, the coil cuts the magnetic field of the permanent magnet to generate electricity, which is then supplied to the tire pressure monitoring system through the wires. This allows for a continuous supply of power to the tire pressure monitoring system during the two-wheeled vehicle's operation, preventing the tire pressure monitoring system from failing due to insufficient power and significantly improving the service life of the tire pressure monitoring system.

[0055] Figure 1 This is a schematic diagram of the overall structure of the self-generating system for a two-wheeled vehicle tire pressure monitor provided in an embodiment of this application. Figure 2 for Figure 1 The main view; Figure 3 for Figure 2 Enlarged view of point A in the middle; Figure 4 An exploded view of the self-generating system of the tire pressure monitoring device for two-wheeled vehicles provided in the embodiments of this application; Figure 5 This is a schematic diagram of a tire pressure monitor in a self-generating system for a two-wheeled vehicle tire pressure monitor provided in an embodiment of this application.

[0056] You can refer to this. Figures 1 to 5 This application provides a self-generating system 100 for a two-wheeled vehicle tire pressure monitoring device, comprising:

[0057] Axle 110 is mounted on the frame of the two-wheeled vehicle;

[0058] The hub 120 is rotatably mounted on the axle 110 via a bearing;

[0059] Tire pressure monitoring device 130, fixed on wheel hub 120, is used to detect the internal air pressure of the tires of two-wheeled vehicles;

[0060] A permanent magnet 140 is mounted on the axle 110;

[0061] Coil 150 is mounted on hub 120;

[0062] Wire 160 is electrically connected between coil 150 and tire pressure monitor;

[0063] When the hub 120 rotates, the coil 150 is configured to generate electricity by cutting the magnetic field of the permanent magnet 140 and supply power to the tire pressure monitor 130 through the wire 160.

[0064] The self-generating power system 100 for a two-wheeled vehicle tire pressure monitoring system provided in this application embodiment involves mounting an axle 110 on the two-wheeled vehicle frame, placing a permanent magnet 140 on the axle 110, and rotatably mounting a wheel hub 120 on the axle 110 via bearings. A tire pressure monitoring system 130 is fixed to the wheel hub 120, and a coil 150 is mounted thereon. A wire 160 electrically connects the coil 150 and the tire pressure monitoring system 130. When the wheel hub 120 rotates, the coil 150 cuts the magnetic field of the permanent magnet 140 to generate electricity, which is then supplied to the tire pressure monitoring system 130 via the wire 160. This allows for a continuous supply of power to the tire pressure monitoring system 130 during vehicle operation, preventing the system from failing due to insufficient power. This effectively solves the technical problem in the prior art where the limited internal space of the tire leads to low battery capacity and limited lifespan of the built-in tire pressure monitoring system 130, significantly improving the lifespan of the tire pressure monitoring device.

[0065] In the above embodiments, the hub 120 may include a center disk 121, spokes 122, and a rim 123. The center disk 121 is rotatably mounted on the axle 110 via bearings. The spokes 122 are radially connected to the center disk 121, and the rim 123 is connected to the spokes 122. The coil 150 is disposed on the center disk 121 and surrounds the outer periphery of the permanent magnet 140. Specifically, the center disk 121 of the hub 120 is rotatably mounted on the axle 110 via bearings, the spokes 122 radially connect the center disk 121 and the rim 123, and the coil 150 is disposed on the center disk 121 and surrounds the outer periphery of the permanent magnet 140 on the axle 110. When the wheel hub 120 rotates with the tire, the central disk 121 drives the coil 150 to rotate synchronously, causing the coil 150 to continuously cut the magnetic field formed by the permanent magnet 140 to generate electrical energy. This electrical energy is transmitted through the wire 160 to the tire pressure monitoring device 130 fixed to the wheel hub 120, replacing the traditional method of relying on a battery with limited capacity for power. This structural design utilizes the relative motion between the rotation of the wheel hub 120 and the stationary axle 110 to achieve self-generation, breaking through the limitation of battery size caused by the internal space of the tire, solving the problem of limited service life of the built-in tire pressure monitoring device 130 due to insufficient battery capacity, extending the working cycle of the tire pressure monitoring device 130 and ensuring its stable operation throughout the entire service life of the vehicle.

[0066] In the above embodiments, the permanent magnet 140 and the coil 150 can be located on the outside of the center disc 121 or inside the center disc 121. When the wheel hub 120 rotates, the center disc 121 drives the coil 150 to move synchronously, causing it to form a relative displacement with the permanent magnet 140 on the wheel axle 110. The coil 150 cuts the magnetic field generated by the permanent magnet 140 to generate electrical energy, which is continuously supplied to the tire pressure monitoring device 130 through the wire 160. This design integrates the power generation components into the inner and outer spaces of the center disc 121, making full use of the structure of the wheel hub 120 itself to achieve energy conversion. This avoids the limitation of the battery size by the internal space of the tire and solves the technical problem of the limited service life of the traditional built-in tire pressure monitoring device 130 due to insufficient battery capacity. It achieves the technical effect of extending the working life of the tire pressure monitoring device 130 and ensuring its stable operation throughout the vehicle's entire life cycle. Specifically, when the permanent magnet 140 and the coil 150 are set on the outside of the center disc 121, the installation is relatively convenient and easy to inspect and maintain. By placing the permanent magnet 140 and coil 150 inside the central disk 121, the power generation components can be better protected, avoiding the influence of external environmental factors such as dust and moisture, thus enhancing the stability and durability of the power generation system. At the same time, the overall layout can be made more compact and balanced, which is conducive to the rational use of vehicle space.

[0067] In the above embodiments, the wheel hub 120 may have a boss 124, and the tire pressure monitoring device 130 may have a slot 131 that engages with the boss 124. The slot 131 engages with the boss 124, and the boss 124 on the wheel hub 120 and the slot 131 on the tire pressure monitoring device 130 can form a snap-fit ​​engagement, achieving a stable assembly of the two through a mechanical snap-fit ​​connection. Alternatively, the wheel hub 120 may have a mounting groove, into which the tire pressure monitoring device 130 is embedded for fixation. Both structural designs ensure a reliable connection between the tire pressure monitoring device 130 and the wheel hub 120, ensuring that it rotates synchronously with the wheel hub 120 to stably detect tire pressure. They also adapt to the structural space characteristics of the wheel hub 120, avoiding additional occupation of the limited internal space of the tire. This simplifies the assembly process, improves the stability and adaptability of the connection, and further assists the self-generating system in replacing the traditional battery power supply mode, ensuring the continuous and effective operation of the tire pressure monitoring device 130 throughout the vehicle's entire life cycle.

[0068] In the above embodiments, a threaded connector 170 may also be included, through which the tire pressure monitoring device 130 is fixed to the boss 124 or in the mounting groove. When the tire pressure monitoring device 130 is fixed to the boss 124, the slot 131 of the tire pressure monitoring device 130 can be aligned with the boss 124 of the wheel hub 120 for initial positioning. Then, the threaded connector 170 is passed through the pre-set threaded holes of the tire pressure monitoring device 130 and the boss 124, and the two are further tightened by tightening the threaded connector 170. The initial positioning by snapping ensures the accuracy of the installation position, while the threaded connection provides stronger connection strength, effectively preventing the tire pressure monitoring device 130 from loosening or falling off due to vibration or other factors when the wheel hub 120 rotates at high speed. Furthermore, the detachability of the threaded connection facilitates subsequent maintenance and replacement.

[0069] When the tire pressure monitoring device 130 is fixed in the mounting slot, it can be initially placed into the slot. Then, the threaded connector 170 connects and secures the tire pressure monitoring device 130 to the threaded structure on the inner wall or bottom of the mounting slot. The mounting slot effectively accommodates and limits the movement of the tire pressure monitoring device 130. Combined with the tightening of the threaded connector 170, this ensures greater stability of the tire pressure monitoring device 130 within the mounting slot, preventing displacement during the rotation of the wheel hub 120. Furthermore, the reliability of the threaded connection enhances the overall structure's vibration resistance, further ensuring the operational stability of the tire pressure monitoring device 130.

[0070] In the above embodiment, the rim 123 may have an annular groove 1231 in its circumferential direction, and the tire pressure monitoring device 130 is disposed in the annular groove 1231. The annular groove 1231 utilizes the existing structural space of the rim 123, eliminating the need for additional installation space, making the layout of the entire tire system more compact and reasonable, and avoiding spatial interference with the installation and use of other components. Furthermore, the annular groove 1231 is positioned closer to the inner wall of the tire, allowing the tire pressure monitoring device 130 to more directly and accurately sense changes in tire pressure, reducing detection errors caused by distance and providing users with more accurate tire pressure data. Secondly, the annular groove 1231 provides good enclosure and restraint for the tire pressure monitoring device 130. During vehicle operation, especially when the rim 120 rotates at high speed, it effectively prevents the tire pressure monitoring device 130 from shifting position or even falling off due to centrifugal force, vibration, or other factors. Moreover, the annular groove 1231 can, to a certain extent, block external moisture, dust, and potential collisions, protecting the tire pressure monitoring device 130 and extending its service life. Furthermore, this configuration facilitates overall installation and maintenance. During installation, the tire pressure monitoring device 130 can be directly placed into the annular groove 1231 and fixed, making the operation relatively simple. Later, if inspection, repair, or replacement of the monitoring device is required, it can also be completed relatively easily, improving the overall operability of the system. Additionally, it should be noted that the boss 124 or mounting groove in the above embodiment can be located within the annular groove 1231.

[0071] In the above embodiment, the rim 123 may have a wire passage hole 1232 through which the wire 160 passes. The wire passage hole 1232 on the rim 123 can position the wire 160, keeping it stable during vehicle operation and preventing friction or collision with other components due to shaking, thereby reducing the probability of damage to the wire 160 and ensuring the reliability of the circuit. Secondly, the wire passage hole 1232 makes the wiring of the wire 160 more orderly, making the layout of the entire two-wheeled vehicle tire pressure monitoring system more organized, which facilitates later installation, debugging, and maintenance. Furthermore, the wire passage hole 1232 can effectively prevent the wire 160 from interfering with the normal operation of other vehicle components due to random swinging, thus improving the stability and safety of the entire system.

[0072] In the above embodiment, the wire 160 can extend along the spokes 122. Extending the wire 160 along the spokes 122 fully utilizes the structure of the spokes 122 to constrain the wire 160, resulting in a more regular and orderly layout. This not only effectively prevents the wire 160 from swaying when the hub 120 rotates, reducing the risk of interference and friction with other components, but also enhances the compactness and rationality of the overall system layout, improving the stability of system operation.

[0073] In the above embodiment, the spokes 122 may have a groove 1221, and the wire 160 is disposed in the groove 1221. It is understood that the groove 1221 provides dedicated installation space for the wire 160, enabling precise positioning of the wire 160 and making its installation more standardized and orderly. This design effectively prevents the wire 160 from shifting or wearing due to vibration and friction during vehicle operation, greatly improving the safety and reliability of the wire 160. Furthermore, placing the wire 160 within the groove 1221 allows for a more compact and neat structural layout of the entire wheel hub 120, facilitating system installation, debugging, and subsequent maintenance, and contributing to improved stability and practicality of the entire two-wheeled vehicle tire pressure monitoring system 130.

[0074] Furthermore, this application embodiment also provides a two-wheeled vehicle, including the two-wheeled vehicle tire pressure monitoring self-generating system 100 described in the above embodiment. The two-wheeled vehicle tire pressure monitoring self-generating system 100 includes an axle 110, a hub 120, a tire pressure monitor 130, a permanent magnet 140, a coil 150, and a wire 160. The axle 110 is mounted on the frame of the two-wheeled vehicle. The hub 120 is rotatably mounted on the axle 110 via a bearing. The tire pressure monitor 130 is fixed on the hub 120 and is used to detect the internal air pressure of the two-wheeled vehicle tires. The permanent magnet 140 is disposed on the axle 110. The coil 150 is disposed on the hub 120. When the wheel hub 120 rotates, the coil 150 cuts the magnetic field of the permanent magnet 140 to generate electricity, and supplies power to the tire pressure monitoring device 130 through the wire 160. This allows the tire pressure monitoring device 130 to be continuously powered during the two-wheeled vehicle's operation, preventing the tire pressure monitoring device 130 from failing due to insufficient power. This significantly improves the service life of the tire pressure monitoring device and enhances the reliability and safety of the two-wheeled vehicle.

[0075] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A self-generating power system for a two-wheeled vehicle tire pressure monitoring device, characterized in that, include: Axle, mounted on the frame of the two-wheeled vehicle; The hub is rotatably mounted on the axle via bearings; A tire pressure monitoring device, fixed to the wheel hub, is used to detect the air pressure inside the tires of the two-wheeled vehicle; A permanent magnet is mounted on the axle; The coil is mounted on the hub; A wire is electrically connected between the coil and the tire pressure monitor; When the wheel hub rotates, the coil is configured to generate electricity by cutting the magnetic field of the permanent magnet and supply power to the tire pressure monitor through the wire.

2. The self-generating system for a two-wheeled vehicle tire pressure monitoring device according to claim 1, characterized in that, The hub includes a center disc, spokes, and a rim. The center disc is rotatably mounted on the axle via the bearing. The spokes are radially connected to the center disc. The rim is connected to the spokes. The coil is disposed on the center disc and surrounds the outer periphery of the permanent magnet.

3. The self-generating system for a two-wheeled vehicle tire pressure monitoring device according to claim 2, characterized in that, The permanent magnet and the coil are located outside the central disk or inside the central disk.

4. The self-generating system for a two-wheeled vehicle tire pressure monitoring device according to claim 3, characterized in that, The wheel hub has a boss, and the tire pressure monitor has a slot that engages with the boss; the slot engages with the boss. Alternatively, the wheel hub has a mounting groove in which the tire pressure monitor is mounted.

5. The self-generating system for a two-wheeled vehicle tire pressure monitoring device according to claim 4, characterized in that, It also includes a threaded connector, through which the tire pressure monitor is fixed to the boss or the mounting groove.

6. The self-generating system for a two-wheeled vehicle tire pressure monitoring device according to any one of claims 2-5, characterized in that, The rim has an annular groove in its circumference, and the tire pressure monitor is disposed in the annular groove.

7. The self-generating system for a two-wheeled vehicle tire pressure monitoring device according to any one of claims 2-5, characterized in that, The rim has a wire hole through which the wire passes.

8. The self-generating system for a two-wheeled vehicle tire pressure monitoring device according to any one of claims 2-5, characterized in that, The conductor extends along the spokes.

9. The self-generating system for a two-wheeled vehicle tire pressure monitoring device according to claim 8, characterized in that, The spokes have grooves, and the conductor is disposed in the grooves.

10. A two-wheeled vehicle, characterized in that, The self-generating system for a two-wheeled vehicle tire pressure monitoring device includes any one of claims 1-9.

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