Tire valve with tire pressure display

Abstract

A tire valve with tire pressure display, which relates to the technical field of tire pressure monitoring. The tire valve comprises a main housing body (1), wherein a transparent housing (3) is mounted on the outer side of the main housing body (1); a battery housing (7) is provided inside the main housing body (1); several button battery bodies (8) are provided inside the battery housing (7); a sealing ring (9) is provided below the battery housing (7); and a pressure sensor (10) is mounted on the bottom of the sealing ring (9). The pressure sensor (10) and a display screen (5) integrated in the valve allow a user to check the tire pressure at any time before riding, during inflation, or during riding, and find abnormal tire pressure conditions in time, such as an excessively low or high tire pressure. Inflation and deflation can be performed without disassembling the valve, thereby effectively preventing a tire burst or other potential safety hazards caused by tire pressure problems, and thus ensuring the personal safety of a rider, especially during high-speed riding or under complex road conditions.

Description

A tire valve with tire pressure display Technical Field

[0001] This invention relates to the field of tire pressure monitoring technology, and more particularly to a tire valve with tire pressure display. Background Technology

[0002] With the increasing popularity of bicycles and electric bikes, tire pressure has a crucial impact on riding safety and comfort. For bicycle and electric bike users, traditional tire pressure monitoring methods mostly rely on regular visits to repair shops or manual measurement using simple mechanical tire pressure gauges.

[0003] Mountain bikes typically use American-style valves, often simply called American valves, which are a type of inflation device widely used in the tires of all modern motorized vehicles. Road bikes typically use French-style valves, often simply called French valves, which are mostly used on road bikes. This type of valve consists of a copper tube body with external threads, a valve screw, a valve cap, and a nut that secures the valve to the rim.

[0004] In real-world use, bicycles and electric bikes often face complex road conditions, including bumpy surfaces and varying temperature environments. These factors can cause changes in tire pressure. Moreover, since bicycles and electric bikes typically lack the sophisticated tire pressure monitoring systems found in cars, it is difficult for users to detect abnormal tire pressure in a timely manner. For example, low tire pressure increases riding resistance, leading to excessive tire wear and potentially even a tire blowout during riding. Conversely, high tire pressure reduces riding comfort and handling.

[0005] Existing small tire pressure monitoring devices either require complex installation steps or are expensive, making them inconvenient and uneconomical for bicycle and electric vehicle users. In addition, some monitoring devices lack an intuitive display method and require connection to an external display device, which is not practical while riding. Furthermore, there is currently a lack of a tire pressure monitoring solution on the market that can adapt to both French and American valve types and work reliably in complex riding environments. Therefore, there is a need for a simple, practical, and cost-effective tire pressure monitoring solution specifically designed for bicycles and electric vehicles.

[0006] Therefore, we propose a tire valve with tire pressure display. Technical issues

[0007] The purpose of this invention is to address the shortcomings of existing technologies. Some existing small tire pressure monitoring devices either require complex installation steps or are expensive, making them inconvenient and uneconomical for bicycle and electric vehicle users. In addition, some monitoring devices lack an intuitive display method and require connection to an additional display device, which is not practical during riding. Furthermore, there is currently a lack of a tire pressure monitoring solution on the market that can adapt to both French and American valve types and work reliably in complex riding environments. Technical solutions

[0008] To achieve the above objectives, the present invention adopts the following technical solution:

[0009] A tire valve with tire pressure display includes a housing body, a transparent outer shell mounted on the outside of the housing body, a battery housing inside the housing body, a plurality of button battery bodies inside the battery housing, a sealing ring below the battery housing, and a pressure sensor mounted at the bottom of the sealing ring.

[0010] A connecting connector is installed at the bottom of the main body of the outer casing. A tire pressure display device is installed inside the main body of the outer casing and on the right side of the battery casing. The tire pressure display device is connected to the pressure sensor through a wire. The tire pressure display device is used to receive signals from the pressure sensor and display them in real time.

[0011] The tire pressure display device includes a main circuit board with buttons installed on it, and a display screen is provided at the connection point of the main circuit board.

[0012] As a preferred embodiment of the present invention, the tire pressure display device further includes a signal conditioning circuit, a microcontroller, and a data bus.

[0013] As a preferred embodiment of the present invention, the signal conditioning circuit includes an amplification circuit and a filtering circuit. The amplification circuit adopts an OP07, and the filtering circuit adopts a passive filter to remove high-frequency noise and interference in the signal.

[0014] As a preferred embodiment of the present invention, the microcontroller adopts the STM32L4 series. The microcontroller is used for data acquisition and control, configured with an analog-to-digital conversion module, setting the acquisition frequency, accurately converting the analog signal of the pressure sensor into a digital signal, and performing data processing and calculation, processing the pressure data according to the characteristic parameters of the pressure sensor.

[0015] As a preferred embodiment of the present invention, the data bus is used to send the information processed by the microcontroller to the display screen in real time, and the display screen is used to display the pressure value inside the tire.

[0016] As a preferred embodiment of the present invention, the battery casing is used to isolate several button battery bodies from high-pressure gas and moisture inside the tire.

[0017] As a preferred embodiment of the present invention, the transparent outer shell is made of acrylic sheet. Beneficial effects

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] In this invention, the pressure sensor and display screen integrated into the valve allow users to check the tire pressure at any time before riding, during inflation, or while riding, and promptly detect abnormal tire pressure conditions, such as excessively low or high tire pressure. Inflation and deflation can be achieved without disassembling the valve, which can effectively avoid tire blowouts or other safety hazards caused by tire pressure problems, and protect the personal safety of riders, especially when riding at high speeds or in complex road conditions.

[0020] The valve stem is equipped with a display screen, making tire pressure information clear at a glance. Users do not need to carry additional tire pressure measuring tools or connect other devices to obtain tire pressure data. Whether preparing for a daily ride or taking a short break, users can easily check the tire pressure. This convenient visual design greatly improves the ease of use for users.

[0021] The valve stem that can display tire pressure comes in two forms, perfectly accommodating both French and American valve types. Whether it's the French valve commonly used on road bikes or the American valve widely used on electric bikes and mountain bikes, you can choose freely. Attached Figure Description

[0022] Figure 1 is a schematic diagram of the main body inverted structure of a tire valve with tire pressure display provided by the present invention;

[0023] Figure 2 is a schematic diagram of the unfolded transparent shell of a tire valve with tire pressure display provided by the present invention;

[0024] Figure 3 is a schematic diagram of the installation position of the circuit board of a tire valve with tire pressure display provided by the present invention.

[0025] Figure 4 is a schematic diagram of the front cross-sectional structure of a tire valve with tire pressure display provided by the present invention.

[0026] Figure 5 is a schematic diagram of the execution principle system of a tire valve with tire pressure display provided by the present invention;

[0027] Figure 6 is a schematic diagram of the installation of an American-style valve stem with a tire pressure display provided by the present invention.

[0028] Figure 7 is a schematic diagram of the overall installation of a tire valve with tire pressure display on a bicycle according to the present invention.

[0029] Legend: 1. Main body of the casing; 2. French valve core; 3. Transparent casing; 4. Circuit board; 5. Display screen; 6. Button; 7. Battery casing; 8. Button battery body; 9. Sealing ring; 10. Pressure sensor; 11. Connector; 12. Wire; 13. Signal conditioning circuit; 14. Filtering circuit; 141. Amplification circuit; 15. Microcontroller; 16. Data bus. The best embodiment of the present invention

[0030] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0031] To facilitate understanding of the present invention, a more comprehensive description of the invention will be provided below with reference to relevant embodiments. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of the present invention will be more thorough and complete.

[0032] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the specification of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0034] Example

[0035] As shown in Figures 1-7, this invention provides a technical solution: the outer shell 1, as the core supporting structure of the entire electronic tire pressure gauge, is made of high-strength and lightweight engineering plastic, and its design fully considers the installation space and layout rationality of the internal components. The transparent outer shell 3 is made of acrylic sheet, which has high transparency, good weather resistance, and mechanical strength. The transparency of the acrylic sheet ensures that users can clearly see the contents of the tire pressure display device, and its weather resistance ensures that it will not discolor or deform under various complex outdoor cycling environments, such as high temperature, humidity, and ultraviolet radiation, thus guaranteeing long-term stable visibility.

[0036] By selecting appropriate materials, the transparent shell 3 achieves the functions of protecting internal components and facilitating user viewing of displayed information. It uses acrylic sheet, which utilizes its physical and chemical properties to meet the needs of outdoor use.

[0037] The battery casing 7 is a sealed structure specifically designed to accommodate several button cell battery bodies 8. Its interior is finely machined and has slots that precisely match the shape and size of the button cells to ensure that the battery remains stable under severe vibrations during riding. The battery casing 7 is made of insulating and chemically resistant materials, such as polycarbonate. This material can effectively isolate the button cell battery body 8 from high-pressure gases and moisture that may be present in the tire. If the button cell battery comes into contact with moisture, it may short-circuit, and high-pressure gases may cause physical damage to the battery casing 7, thereby affecting the normal operation of the entire electronic tire pressure gauge.

[0038] By utilizing the properties of insulating and corrosion-resistant materials such as polycarbonate, the battery is protected from adverse external factors and its normal power supply function is maintained.

[0039] The sealing ring 9 is located below the battery casing 7. It is a rubber material with high elasticity and aging resistance. Its function is to form a reliable sealing environment between the pressure sensor 10 and the battery casing 7, preventing high-pressure gas, moisture or impurities in the tire from entering the battery casing 7 and other internal spaces of the electronic tire pressure gauge.

[0040] The pressure sensor 10 is installed at the bottom of the sealing ring 9. It is a high-precision and high-sensitivity MEMS (microelectromechanical system) pressure sensor 10. The sensor's sensing diaphragm is in direct contact with the gas inside the valve. When the air pressure inside the tire acts on the sensing diaphragm, the diaphragm will undergo a slight deformation, thereby causing changes in the electrical parameters (such as resistance and capacitance) inside the sensor, which is used to measure the tire pressure.

[0041] The sealing ring 9 utilizes the elasticity and sealing properties of rubber to achieve waterproof, gas-proof and dustproof functions. The pressure sensor 10, based on MEMS technology, measures pressure by converting the deformation of the sensing diaphragm into an electrical signal.

[0042] The connecting connector 11 is installed at the bottom of the housing body 1. It is the key part for connecting the electronic tire pressure gauge to the valve stem. The design of the connecting connector 11 is optimized according to the different structural characteristics of French valve stems and American valve stems. Please refer to Figures 1 and 6 in the description. For French valve stems, the connecting connector 11 has a slender channel and sealing structure that fits the French valve stem, which can fit tightly on the French valve stem to ensure the unobstructed and sealed air passage. For American valve stems, the connecting connector 11 has a wider opening and a corresponding clamping device to firmly connect the American valve stem and prevent loosening during use. This design allows the electronic tire pressure gauge to select the corresponding connecting connector 11 according to the user's valve stem type, making it more convenient to install on different types of valve stems and meet the needs of different users.

[0043] By designing different connection methods for the different structures of French and American valve stems, a stable and sealed connection between the electronic tire pressure gauge and different valve stems is achieved, ensuring the accuracy of tire pressure measurement.

[0044] The tire pressure display device is located inside the main body 1 and on the right side of the battery casing 7. It is the information processing and display center of the entire electronic tire pressure gauge, including important components such as the main circuit board 4, buttons 6, display screen 5, signal conditioning circuit 13, microcontroller 15, and data bus 16.

[0045] The main circuit board 4 serves as the connection carrier for all components. It adopts a multi-layer printed circuit board (PCB) design, which has good electrical performance and reasonable wiring. The button 6 is installed on the main circuit board 4. Users can perform various operations through the button 6, such as turning the device on / off, switching the display unit (such as kPa and bar), and setting the tire pressure alarm threshold. The display screen 5 is connected to the main circuit board 4 through a fine soldering process. It adopts high-contrast, low-power liquid crystal display screen 5 (LCD) or organic light-emitting diode display screen 5 (OLED) technology, which can clearly and stably display the pressure value inside the tire.

[0046] The signal conditioning circuit 13 is crucial for ensuring the quality of the output signal from the pressure sensor 10. The amplifier circuit 141 uses an OP07 high-precision operational amplifier, which features low noise, high gain, and low offset voltage. Since the analog signal output by the pressure sensor 10 is typically very weak, possibly only a few millivolts to tens of millivolts, the OP07 can linearly amplify these weak signals according to a preset amplification factor to meet the requirements of subsequent analog-to-digital conversion.

[0047] The filter circuit 14 uses a passive filter, which is composed of passive components such as capacitors and inductors. By reasonably designing the filter parameters, high-frequency noise and interference in the signal can be effectively filtered out. For example, by selecting appropriate capacitor and inductor values, a low-pass filter with a cutoff frequency of 100Hz can be designed to block high-frequency noise signals higher than 100Hz, making the conditioned signal purer and more stable, and improving the measurement accuracy of the entire system.

[0048] The OP07 operational amplifier amplifies signals using its electrical characteristics, while the passive filter filters out high-frequency noise based on the impedance characteristics of capacitors and inductors to signals of different frequencies, thus improving signal quality together.

[0049] The microcontroller 15 uses the STM32L4 series, which is a low-power, high-performance 32-bit microcontroller. In terms of data acquisition and control, it can accurately control the data acquisition frequency by configuring its own rich analog-to-digital converter (ADC) modules. For example, the acquisition frequency can be flexibly set between 1 and 10 times per second according to different cycling scenarios and user needs.

[0050] During the data acquisition process, the microcontroller 15 precisely controls the ADC module to convert the analog signal output by the pressure sensor 10 into a digital signal. For data processing and calculation, the microcontroller 15 performs complex mathematical operations on the converted digital signal based on the characteristic parameters of the pressure sensor 10, such as sensitivity, zero-point offset, and linearity.

[0051] The STM32L4 series microcontroller 15 utilizes its internal ADC module and powerful computing capabilities, combined with sensor characteristic parameters, to achieve accurate acquisition and processing of pressure signals.

[0052] The data bus 16 plays a crucial role in information transmission throughout the system. It serves as a high-speed communication channel between the microcontroller 15 and the display screen 5, employing standard communication protocols such as SPI (Serial Peripheral Interface) or I2C (Inter-Integrated Circuit Bus). The data bus 16 can quickly and stably transmit the tire pressure information processed by the microcontroller 15 to the display screen 5 in real time. Through strict data transmission protocols and high-speed data transmission rates, the integrity and timeliness of information during transmission are guaranteed, enabling the display screen 5 to update the displayed content promptly and accurately, providing users with the latest tire pressure data.

[0053] By leveraging the efficiency and stability of standard communication protocols such as SPI or I2C, fast data transmission between the microcontroller 15 and the display screen 5 is achieved.

[0054] In summary, tire pressure stability is crucial during cycling, especially at high speeds or on complex road conditions. When tire pressure is too high, the contact area between the tire and the ground decreases, leading to reduced grip and making the vehicle more prone to loss of control. Conversely, when tire pressure is too low, excessive tire deformation generates significant heat, increasing the risk of a blowout and also increasing rolling resistance. This electronic tire pressure gauge allows users to check tire pressure before or during a ride, promptly identifying any abnormalities. If tire pressure exceeds the normal range (e.g., the normal range is 2.0-2.8 bar; when tire pressure is below 2.0 bar or above 2.8 bar), users can take immediate action, such as adjusting the tire pressure or checking for leaks, effectively preventing blowouts or other safety hazards caused by tire pressure issues and ensuring the rider's safety.

[0055] After the user installs the button battery, the electronic tire pressure gauge starts working. The microcontroller 15 first performs initialization operations, including setting its own internal registers, clock source, and peripheral interfaces (such as ADC, SPI, I2C, etc.). At the same time, it initializes various hardware components such as pressure sensor 10 and display screen 5. For example, it sends an initialization command to pressure sensor 10 to obtain the sensor's initial state and calibration parameters, and initializes display screen 5, including display mode, brightness, etc.

[0056] During riding, the air pressure inside the tire acts on the sensing diaphragm of the pressure sensor 10. The pressure sensor 10 outputs a corresponding analog electrical signal according to the air pressure. This analog signal first enters the signal conditioning circuit 13. In the signal conditioning circuit 13, the OP07 amplifier circuit 141 amplifies the weak sensor signal according to the preset amplification factor. Then, it is filtered out by a passive filter to remove high-frequency noise and interference, resulting in a clean and stable analog signal. The conditioned analog signal is sent to the ADC port of the microcontroller 15. The microcontroller 15 converts the analog signal into a digital value through the ADC according to the set data acquisition frequency (e.g., 5 times per second).

[0057] After receiving the digital value converted by the ADC, the microcontroller 15 calibrates and calculates the digital value according to the characteristic parameters of the pressure sensor 10 (such as sensitivity, zero offset, linearity, etc.). If the sensor has a temperature compensation function, the microcontroller 15 will also acquire temperature data and perform compensation calculation on the pressure value in combination with the temperature. The calculated tire pressure value is stored in the memory of the microcontroller 15 after unit conversion (such as conversion to commonly used bar or psi).

[0058] The microcontroller 15 sends the processed tire pressure value to the display screen 5 via the data bus 16 (such as SPI or I2C). The display screen 5 driver chip updates the display content according to the received data, and displays the tire pressure value on the display screen 5 in a clear and intuitive manner. Users can directly see the tire pressure information on the display screen 5 through the transparent casing 3.

[0059] If the user presses button 6 on the main circuit board 4, some interactive functions can be realized, such as switching the tire pressure display unit and setting the tire pressure alarm threshold. When the tire pressure value exceeds the alarm threshold set by the user, the display screen 5 can remind the user to pay attention to the abnormal tire pressure by flashing or displaying special symbols.

[0060] The electronic tire pressure gauge continues to perform the above steps, monitoring tire pressure changes in real time to provide users with timely and accurate tire pressure information, ensuring riding safety and comfort.

[0061] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A tire valve with tire pressure display, comprising a housing body (1), characterized in that: A transparent shell (3) is installed on the outside of the outer shell body (1), a battery shell (7) is provided inside the outer shell body (1), a number of button battery bodies (8) are provided inside the battery shell (7), a sealing ring (9) is provided below the battery shell (7), and a pressure sensor (10) is installed at the bottom of the sealing ring (9). A connecting connector (11) is installed at the bottom of the outer shell body (1). A tire pressure display device is installed inside the outer shell body (1) and on the right side of the battery shell (7). The tire pressure display device is connected to the pressure sensor (10) through a wire (12). The tire pressure display device is used to receive signals from the pressure sensor (10) and display them in real time. The tire pressure display device includes a circuit board (4), on which buttons (6) are installed, and a display screen (5) is provided at the connection point of the circuit board (4).

2. A tire valve with tire pressure display according to claim 1, characterized in that: The tire pressure display device also includes a signal conditioning circuit (13), a microcontroller (15), and a data bus (16).

3. A tire valve with tire pressure display according to claim 2, characterized in that: The signal conditioning circuit (13) includes an amplifier circuit (141) and a filter circuit (14). The amplifier circuit (141) uses an OP07, and the filter circuit (14) uses a passive filter to remove high-frequency noise and interference from the signal.

4. A tire valve with tire pressure display according to claim 3, characterized in that: The microcontroller (15) adopts the STM32L4 series. The microcontroller (15) is used for data acquisition and control, configuring an analog-to-digital conversion module, setting the acquisition frequency, accurately converting the analog signal of the pressure sensor (10) into a digital signal, and performing data processing and calculation at the same time, processing pressure data according to the characteristic parameters of the pressure sensor (10).

5. A tire valve with tire pressure display according to claim 4, characterized in that: The data bus (16) is used to send the information processed by the microcontroller (15) to the display screen (5) in real time. The display screen (5) is used to display the pressure value inside the tire.

6. A tire valve with tire pressure display according to claim 1, characterized in that: The battery casing (7) is used to isolate several button battery bodies (8) from high-pressure gas and moisture inside the tire.

7. A tire valve with tire pressure display according to claim 1, characterized in that: The transparent outer shell (3) is made of acrylic sheet.

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