Tire pressure alarm with external inflating valve

Abstract

The utility model provides a tire pressure alarm with an external inflating valve, which relates to the technical field of tire pressure monitoring and comprises an inflating valve body, a semitransparent shell is arranged at the top of the inflating valve body, a transparent cover is arranged at the top of the semitransparent shell, and a plurality of button battery bodies are arranged in the transparent cover. A PCBA (Printed Circuit Board Assembly) control circuit board is arranged below the plurality of button battery bodies, and an air pressure detection chip, a control chip, a power supply management module, an LED traffic light, a vibration sensor, a real-time clock chip and a storage chip are mounted on the PCBA control circuit board. And the air pressure detection chip can accurately sense air pressure change and accurately transmit data to the control chip for processing, so that the problems of inaccurate measurement and incapability of real-time monitoring caused by human factors of a manual tire gauge are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of tire pressure monitoring, in particular to a valve stem external tire pressure alarm device. Background Art

[0002] During cycling activities, the tire pressure, a crucial factor, plays a vital role in the cycling experience and safety.

[0003] Appropriate tire pressure is directly related to cycling safety. If the tire pressure is too high, the contact area between the tire and the ground decreases, and the grip force reduces. When encountering a wet or slippery road surface or in case of emergency braking, it is easy to cause skidding and loss of control, increasing the risk of falling. On the contrary, too low tire pressure will cause the tire to deform excessively, generate too much heat, and increase the possibility of a flat tire. In addition, during driving, too low tire pressure will also weaken the buffering ability of the tire to road obstacles, making it difficult for the cyclist to maintain balance when encountering bumps, thus triggering accidents.

[0004] Moreover, tire pressure also greatly affects cycling comfort. When the tire pressure is outside the normal range, the cyclist can obviously feel the vibrations and impacts from the road surface, which will not only cause physical fatigue but also may cause physical injuries, such as discomfort in the wrists, waist, and neck. On the contrary, appropriate tire pressure can provide good shock absorption effect, enabling the cyclist to maintain a relatively stable and comfortable state under various road conditions.

[0005] In traditional tire pressure detection methods, a manual tire pressure gauge is a common tool. However, this method has many drawbacks. First of all, the operation process is cumbersome. The cyclist needs to stop the bike, remove the tire valve cap, align the tire pressure gauge with the valve, and then read the pressure value. This series of actions is not only time-consuming and laborious but also difficult to perform frequently during cycling, making it impossible to achieve real-time monitoring. Secondly, the measurement accuracy of the manual tire pressure gauge is easily affected by human factors, such as improper operation and reading errors, resulting in inaccurate measurement results.

[0006] Therefore, we propose a valve stem external tire pressure alarm device. Content of the Utility Model

[0007] The purpose of the utility model is to solve the drawbacks existing in the prior art. In traditional tire pressure detection methods, a manual tire pressure gauge is a common tool. However, this method has many drawbacks. First of all, the operation process is cumbersome. The cyclist needs to stop the bike, remove the tire valve cap, align the tire pressure gauge with the valve, and then read the pressure value. This series of actions is not only time-consuming and laborious but also difficult to perform frequently during cycling, making it impossible to achieve real-time monitoring. Secondly, the measurement accuracy of the manual tire pressure gauge is easily affected by human factors, such as improper operation and reading errors, resulting in inaccurate measurement results.

[0008] To achieve the above object, the utility model adopts the following technical solutions:

[0009] A valve stem external tire pressure alarm, including a valve stem body, a translucent shell is provided at the top of the valve stem body, a transparent cover is provided at the top of the translucent shell, and a plurality of button battery bodies are provided inside the transparent cover. Below the plurality of button battery bodies is a PCBA control circuit board;

[0010] A pressure detection chip, a control chip, a power management module, LED red and green lights, a vibration sensor, a real-time clock chip, and a storage chip are installed on the PCBA control circuit board;

[0011] The power management module further includes a power conversion chip, a battery power monitoring circuit, a battery protection circuit, a power switching circuit, and a control logic circuit;

[0012] A sealing ring is provided around the pressure detection chip, a tightening screw is provided below the pressure detection chip, and a thread is fixedly connected at the connection of the tightening screw.

[0013] Preferably, the pressure detection chip adopts a high-precision and high-sensitivity MEMS pressure sensor chip, such as BMP280, which can accurately sense the pressure change inside the tire and convert it into a digital signal for output.

[0014] Preferably, the control chip adopts a low-power and high-performance microcontroller, such as STM32F103. The control chip is responsible for receiving and processing the data of the pressure detection chip, running an algorithm to judge the tire pressure state, generating control instructions to drive the LED red and green lights, managing the power supply, and interacting with other chips.

[0015] Preferably, the LED red and green lights adopt ultra-high brightness surface-mounted LED lamp beads. The green light indicates normal tire pressure, and the red light indicates abnormal tire pressure, enhancing the visual effect.

[0016] Preferably, the vibration sensor adopts an accelerometer-type sensor, such as ADXL345, which sensitively detects the vibration state of the device and outputs an electrical signal to the control chip.

[0017] Preferably, the real-time clock chip adopts DS3231, which is used to record the time information of tire pressure detection and provide a time stamp for data recording and fault analysis.

[0018] Preferably, the storage chip adopts an EEPROM chip AT24C02, which is used to store information such as historical data of tire pressure and set parameters.

[0019] Preferably, the power management module consists of a power conversion chip, a battery power monitoring circuit, a battery protection circuit, a power switching circuit, and a control logic circuit, providing a stable and suitable power supply for the entire system, ensuring the effective utilization of the electrical energy of the button battery body, and preventing abnormal situations such as over-discharge of the battery.

[0020] Preferably, the tightening screw can tighten the valve core inside the nozzle body to perform deflation treatment, and can also support the PCBA control circuit board.

[0021] Preferably, the thread is installed on the tire valve, the valve core will be lifted, and air enters the pressure detection chip from the tire valve.

[0022] Compared with the prior art, the beneficial effects of the present utility model are:

[0023] In the present utility model, the tire pressure monitoring function of the device is accurate and real-time. The pressure detection chip can accurately sense the pressure change and transmit the data accurately to the control chip for processing, avoiding the problems of inaccurate measurement and inability to monitor in real-time caused by human factors of the manual tire pressure gauge.

[0024] Through different flashing modes of the LED red and green lights, the tire pressure status is intuitively and clearly displayed for the rider, enabling the rider to quickly make accurate judgments and responses. Compared with the manual tire pressure gauge that needs to read the value and judge by oneself, the risk of misjudgment is greatly reduced, and the riding safety is improved.

[0025] At the same time, the intelligent power management module ensures the stable operation of the device under the power supply of the replaceable button battery, intelligently switches the working mode according to the vibration state, effectively saves energy and extends the battery usage time. While the manual tire pressure gauge has no power management problem, the rider needs to constantly pay attention to whether it works properly. The power management method of this device is more intelligent, reducing the rider's worry about the battery power. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the main structure of an external tire valve pressure alarm provided by the present utility model;

[0027] Figure 2 It is a schematic cross-sectional view of the main body of an external tire valve pressure alarm provided by the present utility model;

[0028] Figure 3 It is a system block diagram of an external tire valve pressure alarm provided by the present utility model.

[0029] Legend: 1. Air nozzle body; 2. Translucent housing; 3. Transparent cover; 4. Button battery body; 5. PCBA control circuit board; 6. Air pressure detection chip; 7. Control chip; 8. Power management module; 801. Power conversion chip; 802. Battery power monitoring circuit; 803. Battery protection circuit; 804. Power switching circuit; 805. Control logic circuit; 9. LED red / green light; 10. Vibration sensor; 11. Real-time clock chip; 12. Storage chip; 13. Sealing ring; 14. Tightening screw; 15. Thread. Detailed implementation

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0031] To facilitate the understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant. Several embodiments of the present invention are given. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0032] It should be noted that when an element is referred to as "fixedly provided on" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present invention belongs. The terms used in the description of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0034] Embodiment 1

[0035] As Figures 1 - 3As shown in the figure, the present utility model provides a technical solution: an external valve stem tire pressure alarm, which includes a valve stem body 1. A translucent outer shell 2 is provided at the top of the valve stem body 1. A transparent cover 3 is provided at the top of the translucent outer shell 2. Inside the transparent cover 3, there are several button battery bodies 4. Below the several button battery bodies 4, there is a PCBA control circuit board 5. An air pressure detection chip 6, a control chip 7, a power management module 8, an LED red / green light 9, a vibration sensor 10, a real-time clock chip 11, and a storage chip 12 are installed on the PCBA control circuit board 5. The power management module 8 further includes a power conversion chip 801, a battery power monitoring circuit 802, a battery protection circuit 803, a power switching circuit 804, and a control logic circuit 805. A sealing ring 13 is provided around the air pressure detection chip 6. A tightening screw 14 is provided below the air pressure detection chip 6. A thread 15 is fixedly connected at the connection of the tightening screw 14. The tire pressure monitoring function of this device is accurate and real-time. The air pressure detection chip 6 can accurately sense the air pressure change and transmit the data accurately to the control chip 7 for processing, avoiding the problems of inaccurate measurement and inability to monitor in real-time caused by human factors in a manual tire pressure gauge. Through different flashing modes of the LED red / green light 9, the tire pressure status is intuitively and clearly displayed for the rider, enabling the rider to quickly make accurate judgments and responses. Compared with a manual tire pressure gauge that requires reading values and making judgments by oneself, the misjudgment risk is greatly reduced, and the riding safety is improved. At the same time, the intelligent power management module 8 ensures the stable operation of the device under the power supply of replaceable button batteries, intelligently switches the working mode according to the vibration state, effectively saves energy and prolongs the battery usage time. While a manual tire pressure gauge has no power management problem, the rider needs to constantly pay attention to whether it is working properly. The power management method of this device is more intelligent, reducing the rider's worry about the battery power.

[0036] Embodiment 2

[0037] As Figures 1 - 3 As shown in the figure, the present utility model provides a technical solution: The air pressure detection chip 6 adopts a high-precision and high-sensitivity MEMS air pressure sensor chip, such as BMP280, which can accurately sense the air pressure change inside the tire and convert it into a digital signal for output. It is connected to the control chip 7 through the I2C communication protocol. The SDA and SCL pins of the air pressure detection chip 6 are respectively connected to the corresponding I2C pins of the control chip 7. At the same time, filter capacitors are connected between the power supply pin (VCC) and the ground pin (GND) to reduce the influence of power supply noise. A pull-up resistor is added on the I2C line to improve the signal stability.

[0038] The control chip 7 uses a low-power and high-performance microcontroller, such as STM32F103. The control chip 7 is responsible for receiving and processing the data from the air pressure detection chip 6, running algorithms to judge the tire pressure status, generating control instructions to drive the LED traffic lights 9, managing the power supply, and interacting with other chips. It is connected to the air pressure detection chip 6 through I2C. Multiple GPIO pins are respectively connected to the control pins of the LED traffic lights 9, the vibration sensor 10, the real-time clock chip 11, the storage chip 12, and the power management module 8. It receives the interrupt signal from the vibration sensor 10 through the interrupt pin.

[0039] The LED traffic lights 9 use ultra-high brightness surface-mounted LED lamp beads. The green light indicates normal tire pressure, and the red light indicates abnormal tire pressure to enhance the visual effect. The anode of each LED lamp bead is connected to the GPIO pin of the control chip 7 through a current-limiting resistor, and the cathode is grounded. The resistance value of the current-limiting resistor is calculated and selected according to the parameters of the LED lamp bead and the GPIO driving ability of the control chip 7.

[0040] The vibration sensor 10 uses an accelerometer-type sensor, such as ADXL345, to sensitively detect the vibration state of the device and output an electrical signal to the control chip 7. The output pin of the vibration sensor 10 is connected to the interrupt pin of the control chip 7. A filter capacitor is connected between the output pin and the ground to smooth the signal and provide a stable power supply for it at the same time.

[0041] The real-time clock chip 11 uses DS3231 to record the time information of tire pressure detection, provide a time stamp for data recording and fault analysis, communicate with the control chip 7 through I2C or SPI, and the power supply pin is connected to the power management module 8 to ensure stable power supply.

[0042] The storage chip 12 uses the EEPROM chip AT24C02 to store information such as historical data of tire pressure and set parameters, is connected to the control chip 7 through I2C, and the power supply pin is connected to the power management module 8.

[0043] The power management module 8 consists of a power conversion chip 801, a battery power monitoring circuit 802, a battery protection circuit 803, a power switching circuit 804, and a control logic circuit 805. It provides a stable and suitable power supply for the entire system, ensuring the effective utilization of the electrical energy of the button battery body 4 and preventing abnormal situations such as over-discharge of the battery. The input pin of the power conversion chip 801 is connected to a replaceable button battery, such as a CR2032 button battery, and the output pin provides the required voltage and current for each component of the system. The battery power monitoring circuit 802 continuously monitors the remaining power of the battery and feeds back relevant information to the control chip 7. The battery protection circuit 803 cuts off the power supply to the system when the battery power is too low to avoid damage to the battery due to over-discharge. The power switching circuit 804 switches the power supply path between the normal working mode and the low-power mode according to the instructions of the control chip 7. The control chip 7 is connected to the control logic circuit 805 in the power management module 8 through GPIO pins to achieve the monitoring and management of the power status.

[0044] The tightening screw 14 can tighten the valve core inside the valve body 1 to release air, and can also support the PCBA control circuit board 5.

[0045] The thread 15 is installed on the valve nozzle, the valve core will be lifted, and air enters the pressure detection chip 6 from the tire valve nozzle.

[0046] The working process of the present utility model: When using an external tire pressure alarm for a valve nozzle, first, when the device is started, the device is powered by the replaceable button battery body 4. The power conversion chip 801 in the power management module 8 converts the electrical energy of the button battery body 4 to provide appropriate and stable voltage and current for each component of the system.

[0047] When the user pushes and moves the bicycle, the vibration sensor 10 continuously monitors the vibration state of the device. When vibration is detected, its output pin sends an electrical signal to the interrupt pin of the control chip 7. After receiving the interrupt signal, the control chip 7 is awakened and enters the normal working mode from the low-power mode.

[0048] The pressure detection chip 6 continuously and accurately senses the pressure change inside the tire and transmits the pressure data to the control chip 7 through the I2C communication protocol. After receiving the pressure data, the control chip 7 processes and analyzes it using an internal algorithm.

[0049] The control chip 7 determines whether the current tire pressure state is normal or abnormal according to the preset tire pressure judgment algorithm. If the tire pressure is normal, it outputs a control signal through the corresponding GPIO pin to make the green light in the LED red and green light 9 light up for two seconds and cycle. If the tire pressure is abnormal, it controls the red light to light up for two seconds and cycle. If the tire is severely deflated, the red light will flash quickly all the time, visually displaying the tire pressure situation to the rider.

[0050] Meanwhile, the control chip 7 communicates with the real-time clock chip 11 via I2C or SPI to obtain accurate time information. This time information, together with the tire pressure data, is stored in the storage chip 12 for subsequent query and analysis of the tire pressure change pattern, as well as for fault troubleshooting and maintenance.

[0051] During the entire working process, the battery power monitoring circuit 802 in the power management module 8 monitors the remaining power of the button cell body 4 in real time and feeds the power information back to the control chip 7. When the battery power is too low, the battery protection circuit 803 cuts off the power supply to prevent over-discharge damage to the battery. The power switching circuit 804 switches between the normal working mode and the low-power mode according to the instructions of the control chip 7. For example, when the device does not detect vibration for a long time, the control chip 7 issues an instruction to make the power switching circuit 804 switch to the low-power mode to save battery energy and extend the usage time of the device.

[0052] Through the close cooperation and precise coordination among various chips and modules, the real-time and accurate monitoring and effective management of the bicycle tire pressure are achieved, while ensuring the low-power operation of the device and the rational utilization of power.

[0053] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An external tire pressure alarm for valve stem, comprising a valve stem body (1), characterized in that: The top of the air nozzle body (1) is provided with a semi-transparent housing (2), the top of the semi-transparent housing (2) is provided with a transparent cover (3), and several button battery bodies (4) are arranged inside the transparent cover (3); below the several button battery bodies (4) is a PCBA control circuit board (5). A pressure detection chip (6), a control chip (7), a power management module (8), an LED red and green light (9), a vibration sensor (10), a real-time clock chip (11), and a storage chip (12) are installed on the PCBA control circuit board (5). The power management module (8) further includes a power conversion chip (801), a battery power monitoring circuit (802), a battery protection circuit (803), a power switching circuit (804), and a control logic circuit (805). A sealing ring (13) is arranged around the pressure detection chip (6), a tightening screw (14) is arranged below the pressure detection chip (6), and a thread (15) is fixedly connected to the connection part of the tightening screw (14).

2. The tire pressure alarm with an external valve according to claim 1, characterized in that: The pressure detection chip (6) adopts a high-precision and high-sensitivity MEMS pressure sensor chip, such as BMP 280, which can accurately sense the air pressure change inside the tire and convert it into a digital signal for output.

3. The valve external tire pressure alarm according to claim 1, characterized in that: The control chip (7) adopts a low-power and high-performance microcontroller, such as STM32F103. The control chip (7) is responsible for receiving and processing the data of the pressure detection chip (6), running an algorithm to judge the tire pressure state, generating a control instruction to drive the LED red and green light (9), managing the power supply, and interacting with other chips.

4. The external tire pressure alarm for valve stems according to claim 1, characterized in that: The LED red and green light (9) adopts ultra-high brightness surface-mounted LED lamp beads. The green light indicates normal tire pressure, and the red light indicates abnormal tire pressure, enhancing the visual effect.

5. The tire pressure alarm with an external valve according to claim 1, characterized in that: The vibration sensor (10) adopts an accelerometer-type sensor, such as ADXL345, which sensitively detects the vibration state of the device and outputs an electrical signal to the control chip (7).

6. The external tire pressure alarm for valve according to claim 1, characterized in that: The real-time clock chip (11) adopts DS3231, which is used to record the time information of tire pressure detection and provide a time stamp for data recording and fault analysis.

7. The valve stem external tire pressure alarm according to claim 1, wherein: The storage chip (12) adopts an EEPROM chip AT24C02, which is used to store information such as historical data of tire pressure and set parameters.

8. The air valve external tire pressure alarm according to claim 1, characterized in that: The power management module (8) is composed of a power conversion chip (801), a battery power monitoring circuit (802), a battery protection circuit (803), a power switching circuit (804), and a control logic circuit (805), which provides a stable and adapted power supply for the whole system, ensures the effective utilization of the electric energy of the button battery body (4), and prevents abnormal situations such as over-discharge of the battery.

9. The tire pressure alarm with an external valve according to claim 1, characterized in that: The tightening screw (14) can tighten the valve core inside the air nozzle body (1) to perform an air release process, and can also support the PCBA control circuit board (5).

10. The tire pressure alarm with an external valve according to claim 1, characterized in that: The thread (15) is installed on the valve nozzle, the valve core will be lifted, and air enters the pressure detection chip (6) from the tire air nozzle.

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