Data transmission device of tire pressure sensor

Abstract

The utility model provides a data transmission device of a tire pressure sensor. The data transmission device comprises a server, handheld equipment with a networking function and the tire pressure sensor, tire pressure sensor control data of different vehicle types are stored in the server, so that the tire pressure sensor can be upgraded or the data can be read; the handheld device comprises a first communication module used for transmitting tire pressure sensor control data in a server of a corresponding vehicle type to the handheld device; the first microcontroller is used for controlling data storage and transceiving in a tire pressure upgrading mode or a tire pressure data reading mode; the second communication module is used for performing data communication with a tire pressure sensor; the tire pressure sensor comprises a third communication module used for carrying out data transmission with the first communication module; and the second microcontroller is used for executing tire pressure upgrading or tire pressure data reading according to the control data after storing, receiving and transmitting the control data. The handheld device does not need a large-capacity data memory, and also does not need complex function keys and a display screen, so that the cost is greatly reduced.

Description

Technical Field

[0001] This disclosure relates to the field of tire pressure sensor technology, and more particularly to the field of data transmission devices for tire pressure sensors. Background Technology

[0002] A tire pressure sensor is a sensor installed inside a car tire. It monitors tire pressure and temperature in real time. The tire pressure sensor is a crucial component of a tire pressure monitoring system (TPMS). Currently, the control (programming, data reading, etc.) of tire pressure sensors is typically achieved using a dedicated handheld tool. This handheld tool mainly consists of an MCU, an LF transmitter, an RF receiver, memory, a display screen, and function buttons. To program this handheld tool for multiple vehicle models, additional memory is needed to store the programming files corresponding to different vehicle models. Users select different vehicle models and control the corresponding tire pressure sensors through the handheld tool's display screen and function buttons.

[0003] Controlling tire pressure sensors using handheld specialized tools has the following disadvantages:

[0004] 1) Handheld dedicated tools are expensive because the tire pressure sensor protocols of different car models on the market are different, so the programming files, LF reading commands, RF receiving configurations and RF protocol parsing fields are different. Handheld dedicated tools need a large capacity memory to store this data. In addition, the car model selection requires a display screen and buttons with different functions, which further increases the cost of the tool.

[0005] 2) The handheld special tool is not updated in a timely manner. If there are errors in the newly added vehicle protocol or the burning file, LF read command, RF receive configuration and RF protocol parsing field stored in the handheld tool, the handheld special tool needs to be modified by software. The handheld special tool can only be used after the software version is upgraded through a special wiring harness. The problem is not resolved in a timely manner and there may be a risk of file transfer errors.

[0006] Therefore, the ability to control tire pressure sensors conveniently and at low cost has become a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0007] In view of the shortcomings of the prior art described above, the purpose of this disclosure is to provide a data transmission device for a tire pressure sensor to solve the problems of the prior art.

[0008] This disclosure provides a data transmission device for a tire pressure sensor, comprising: a server, a handheld device with network connectivity, and a tire pressure sensor; wherein: the server stores tire pressure sensor control data for different vehicle models for upgrading or reading data from the tire pressure sensor; the handheld device includes: a first communication module, which wirelessly connects to the server to transmit the tire pressure sensor control data for the corresponding vehicle model from the server to the handheld device; a first microcontroller, which is communicatively connected to the first communication module and is used for storing and transmitting / receiving the control data in tire pressure upgrade mode or tire pressure data reading mode; a second communication module, which is connected to the first microcontroller and is used for data communication with the tire pressure sensor; the tire pressure sensor includes: a third communication module, which transmits data with the first communication module in the handheld device; and a second microcontroller, which is connected to the second communication module and, after storing and transmitting / receiving the control data, performs tire pressure upgrade or tire pressure data reading based on the control data.

[0009] In one possible implementation of this disclosure, the first communication module is independently located in a mobile terminal, and the handheld device further includes a Bluetooth module: the mobile terminal establishes a wireless communication connection with the server and establishes a Bluetooth connection with the handheld device via the Bluetooth module, transmitting the tire pressure sensor control data of the corresponding vehicle model in the server to the handheld device.

[0010] In one possible implementation of this disclosure, the first microcontroller includes a Bluetooth chip, an RF chip for controlling the transmission of RF signals, and a memory; the Bluetooth chip is used for data communication control with the mobile terminal and for storing the control data in the memory, and the RF chip is communicatively connected to the second communication module for transmitting and receiving the control data.

[0011] In one possible implementation of this disclosure, the Bluetooth chip and the radio frequency chip are integrated into a single structure or are separate structures.

[0012] In one possible implementation of this disclosure, the Bluetooth chip and the RF chip communicate via SPI or IIC.

[0013] In one possible implementation of this disclosure, the first communication module establishes a wireless communication connection with the server via a 4G / 5G network or a Wi-Fi signal.

[0014] In one possible implementation of this disclosure, the second communication module includes: an LF transmitter connected to the first microcontroller for sending a low-frequency signal to the tire pressure sensor to transmit tire pressure sensor control data; and an RF receiver for receiving radio frequency signals from the tire pressure sensor. The third communication module includes: an LF receiver connected to the second microcontroller for receiving a low-frequency signal from the handheld device to receive the tire pressure sensor control data; and an RF transmitter connected to the second microcontroller for sending the tire pressure sensor radio frequency signals to the handheld device.

[0015] In one possible implementation of this disclosure, the second microcontroller includes a tire pressure monitoring chip.

[0016] In one possible implementation of this disclosure, the mobile device is a smartphone, a tablet computer with mobile communication or network capabilities.

[0017] In one possible implementation of this disclosure, the control data includes burn-in files corresponding to different vehicle models, LF read commands, RF receive configurations, and RF protocol parsing fields.

[0018] As described above, the data transmission device for the tire pressure sensor provided in this embodiment of the present disclosure uses a dedicated handheld device for the tire pressure sensor to obtain control data for different vehicle models from the server. The handheld device does not require a large-capacity data storage device, nor does it require complex function buttons and a display screen, which greatly reduces tool costs and enhances the convenience of the tire pressure sensor in obtaining control data for different vehicle models. Attached Figure Description

[0019] Figure 1 The diagram shown is a schematic representation of the overall principle structure of a data transmission device for a tire pressure sensor according to an embodiment of this disclosure.

[0020] Figure 2 The diagram shows the principle structure of a data transmission device for a tire pressure sensor in one embodiment of this disclosure, in which the first communication module is independently installed in a mobile terminal.

[0021] Figure 3 The diagram shown is a schematic diagram of the principle structure of the first microcontroller in the data transmission device of the tire pressure sensor according to an embodiment of this disclosure.

[0022] Figure 4 The diagram shows the principle structure of a handheld device transmitting radio frequency data to a tire pressure sensor in a data transmission device of a tire pressure sensor according to an embodiment of this disclosure.

[0023] Figure 5 The diagram shown is a schematic representation of the principle structure of a tire pressure sensor transmitting radio frequency data to a handheld device in a data transmission device of a tire pressure sensor according to an embodiment of this disclosure.

[0024] Figure 6 The diagram shown is a schematic representation of the principle of transmitting programming data in a data transmission device for a tire pressure sensor according to an embodiment of this disclosure.

[0025] Figure 7 The diagram shown is a schematic representation of a data transmission device for a tire pressure sensor in one embodiment of this disclosure, illustrating the transmission of tire pressure sensor information data.

[0026] Component designation explanation

[0027] 100 servers

[0028] 200 handheld devices

[0029] 201 Mobile Terminal

[0030] 210 First Microcontroller

[0031] 211 Bluetooth chip

[0032] 212 Radio Frequency Chip

[0033] 213 Memory

[0034] 220 First Communication Module

[0035] 230 Second Communication Module

[0036] 231 LF transmitter

[0037] 2311 Low-frequency oscillation circuit

[0038] 2312 Low-frequency modulation circuit

[0039] 2313 Low-frequency power amplifier circuit

[0040] 2314 Low-frequency antenna

[0041] 232 RF receiver

[0042] 2325 RF Receiving Antenna

[0043] 2324 Radio Frequency Signal Amplifier

[0044] 2323 Downconverter Circuit

[0045] 2322 Radio Frequency Filtering Circuit

[0046] 2321 RF demodulation circuit

[0047] 240 Bluetooth module

[0048] 300 Tire Pressure Sensor

[0049] 310 Third Communication Module

[0050] 311 LF receiver

[0051] 3114 Low-frequency receiving antenna

[0052] 3113 Low-frequency signal amplifier circuit

[0053] 3112 Low-frequency filter circuit

[0054] 3111 Low-frequency demodulation circuit

[0055] 312 RF transmitter

[0056] 3121 Radio Frequency Oscillator

[0057] 3122 Radio Frequency Modulation Circuit

[0058] 3123 Radio Frequency Power Amplifier Circuit

[0059] 3124 RF Antenna

[0060] 320 Second Microcontroller Detailed Implementation

[0061] The following specific examples illustrate the implementation of this disclosure. Those skilled in the art can easily understand other advantages and effects of this disclosure from the information disclosed herein. This disclosure can also be implemented or applied through other different specific embodiments, and various details in this disclosure can also be modified or changed according to different viewpoints and applications without departing from the spirit of this disclosure. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this disclosure can be combined with each other.

[0062] The following is based on Figure 1 and Figure 7 For reference, embodiments of this disclosure are described in detail to enable those skilled in the art to readily implement it. This disclosure may be embodied in many different forms and is not limited to the embodiments described herein.

[0063] In this disclosure, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic represented in connection with that embodiment or example is included in at least one embodiment or example of this disclosure. Furthermore, the specific features, structures, materials, or characteristics represented may be combined in any suitable manner in any one or a group of embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples represented in this disclosure, as well as the features of those different embodiments or examples.

[0064] Furthermore, the terms "first" and "second" are used for illustrative purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the representation of this disclosure, "a set" means two or more, unless otherwise explicitly specified.

[0065] For the purpose of clarity, devices unrelated to the description are omitted, and the same or similar components throughout the specification are given the same reference numerals.

[0066] Throughout this specification, when it is said that a device is "connected" to another device, this includes not only "direct connection" but also "indirect connection" by placing other components in between. Furthermore, when it is said that a device "comprises" a certain constituent element, unless otherwise stated otherwise, this does not exclude other constituent elements, but rather implies that other constituent elements may be included.

[0067] While the terms first, second, etc., are used in some examples herein to refer to various elements, these elements should not be limited by these terms. These terms are used only to distinguish one element from another. For example, first interface and second interface, etc., are used. Furthermore, as used herein, the singular forms “a,” “an,” and “the” are intended to include the plural forms as well, unless the context indicates otherwise. It should be further understood that the terms “comprising,” “including,” indicate the presence of the stated feature, step, operation, element, device, item, kind, and / or group, but do not exclude the presence, occurrence, or addition of one or more other features, steps, operations, elements, devices, items, kinds, and / or groups. The terms “or” and “and / or” as used herein are interpreted as inclusive, or mean any one or any combination thereof. Thus, “A, B, or C” or “A, B, and / or C” means “any one of: A; B; C; A and B; A and C; B and C; A, B, and C.” Exceptions to this definition will only occur if the combination of elements, functions, steps, or operations is inherently mutually exclusive in some way.

[0068] The technical terms used herein are for reference only to specific embodiments and are not intended to limit the scope of this disclosure. The singular form used herein includes the plural form unless the statement explicitly indicates otherwise. The word "comprising" as used in this specification means to specify a particular characteristic, region, integer, step, operation, element, and / or component, and does not exclude the presence or addition of other characteristics, regions, integers, steps, operations, elements, and / or components.

[0069] Although not explicitly defined, all terms, including technical and scientific terms used herein, shall have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure pertains. Terms defined in commonly used dictionaries shall be further interpreted as having a meaning consistent with the relevant technical literature and the message of the present disclosure, and shall not be over-interpreted as having an ideal or overly formulaic meaning unless otherwise defined.

[0070] The names used in this disclosure are explained as follows:

[0071] LF: Low Frequency, typically 30-300kHz;

[0072] RF stands for Radio Frequency.

[0073] Tire pressure sensors are sensors used to monitor tire pressure in automobiles. They are typically installed inside the tires and can monitor parameters such as tire pressure and temperature in real time. Operating frequency: Most commonly 3123MHz or 315MHz.

[0074] The purpose of this disclosure is to provide a data transmission device for a tire pressure sensor. When a user needs to upgrade the software of the tire pressure sensor and read tire pressure information, they can conveniently and cost-effectively obtain the required tire pressure sensor control data for different vehicle models through the data transmission device of this embodiment. The following provides a detailed description of the data transmission device for the tire pressure sensor of this embodiment, enabling those skilled in the art to understand it without creative effort.

[0075] This disclosure provides a data transmission device for a tire pressure sensor. Figure 1 This is a schematic diagram illustrating the overall structural principle of the data transmission device for a tire pressure sensor 300 according to an embodiment of this disclosure. Figure 1 As shown, the data transmission device for the tire pressure sensor provided in this disclosure includes: a server 100, a handheld device 200, and a tire pressure sensor 300.

[0076] Wherein: the server 100 stores control data of tire pressure sensors 300 for different vehicle models, for upgrading or reading data of the tire pressure sensors 300; the handheld device 300 includes: a first communication module 220, a first microcontroller 210 and a second communication module 230; the tire pressure sensor 300 includes: a third communication module 310 and a second microcontroller 320.

[0077] The first communication module 220 is wirelessly connected to the server 100 to transmit the control data of the tire pressure sensor 300 in the server 100 corresponding to the vehicle model to the handheld device 200; the first microcontroller 210 is communicatively connected to the first communication module 220 and is used for storing and transmitting / receiving the control data in tire pressure upgrade mode or tire pressure data reading mode; the second communication module 230 is connected to the first microcontroller 210 and is used for data communication with the tire pressure sensor 200; the third communication module 310 is used for data transmission with the first communication module 220 in the handheld device 200; the second microcontroller 320 is connected to the second communication module 230 and is used to store and transmit / receive the control data, and then perform tire pressure upgrade or tire pressure data reading based on the control data.

[0078] In this embodiment, the first communication module 220 can wirelessly connect with the server 100 via a 4G / 5G network or a Wi-Fi signal.

[0079] In other embodiments, the first communication module 220 is independently disposed within a mobile terminal 201. The mobile device is, but is not limited to, a smartphone or a tablet computer with mobile communication or internet connectivity.

[0080] Figure 2 This is a schematic diagram illustrating the principle structure of a data transmission device for a tire pressure sensor in one embodiment of this disclosure, where the first communication module 220 is independently disposed within a mobile terminal 201. Figure 2 As shown, the first communication module 220 is independently installed in a mobile terminal 201. The handheld device 200 also includes a Bluetooth module 240: the mobile terminal 201 wirelessly connects with the server 100 and establishes a Bluetooth connection with the handheld device 200 via the Bluetooth module 240, transmitting the control data of the tire pressure sensor 300 in the server 100 corresponding to the vehicle model to the handheld device 200.

[0081] The mobile terminal 201200 establishes a wireless communication connection with the server 100 and a Bluetooth connection with the handheld device 200, transmitting the control data of the tire pressure sensor 300 in the server 100 corresponding to the vehicle model to the handheld device 200; the handheld device establishes a communication connection with the tire pressure sensor 300, transmitting the control data of the tire pressure sensor 300 in the server to the tire pressure sensor 300.

[0082] In this embodiment, the server 100 stores control data for tire pressure sensors 300 of different vehicle models. This control data includes corresponding programming files, LF read commands, RF receive configurations, and RF protocol parsing fields for each vehicle model. This embodiment utilizes the server 100 to store the control data for tire pressure sensors 300 of different vehicle models, making data updates convenient and fast, and reducing the storage burden on the handheld device 200. Furthermore, storing data on the server 100 allows for diverse data types, improving versatility and facilitating the expansion of the stored data.

[0083] In this embodiment, due to the limited communication distance of the handheld device 200, it is not possible to directly obtain tire pressure sensor 300 control data for different vehicle models from the server 100. The mobile terminal 201 establishes a wireless communication connection with the server 100 to obtain tire pressure sensor 300 control data for different vehicle models from the server 100. In one possible implementation of this disclosure, the mobile terminal 201 establishes a wireless communication connection with the server 100 via a 4G / 5G network or a Wi-Fi signal.

[0084] In one possible implementation of this disclosure, the mobile terminal 201 is equipped with a display screen and at least one function button for selecting a vehicle model. In this embodiment, the vehicle model can be selected via the mobile terminal 201, and the same tire pressure sensor 300 can be adapted to different vehicle models, increasing convenience. The mobile terminal 201 serves as the link for the handheld device 200 to obtain data from the server 100. The user can manually select or automatically search for the desired vehicle model through the mobile terminal 201. The mobile terminal 201 obtains data one-to-one from the server 100 via a 4G / 5G network or Wi-Fi signal, and establishes a connection with the handheld device 200 via Bluetooth signal to complete data transmission.

[0085] The mobile terminal 201 is, for example, a mobile phone. The mobile phone establishes a connection with the server 100 via a 4G / 5G network or Wi-Fi signal. The mobile phone sends instructions to the server 100 based on parameter information such as the selected vehicle model entered by the user on the display screen and / or function keys. The server 100 obtains the LF read command, RF receive configuration, and RF protocol parsing field corresponding to the vehicle model based on the parameter information and sends them to the mobile phone. The specific method of bidirectional data interaction between the mobile phone and the server 100 is well known to those skilled in the art and can be implemented using any method in the prior art. This embodiment is not specifically limited to this method.

[0086] In this embodiment, the mobile terminal 201 establishes a Bluetooth connection with the Bluetooth module 240 in the handheld device 200, and transmits the tire pressure sensor 300 control data of the corresponding vehicle model obtained from the server 100 to the handheld device 200.

[0087] Figure 3 The diagram shown is a schematic representation of the principle structure of the first microcontroller 210 in the data transmission device of the tire pressure sensor 300 according to an embodiment of this disclosure. Figure 3 As shown, in one possible implementation of this disclosure, the first microcontroller 210 includes at least a Bluetooth control chip 211, a radio frequency chip 212 for controlling radio frequency signal transmission, and a memory 213; in addition, it may also include a counter, an I / O interface, and peripheral modules, etc.

[0088] The Bluetooth chip 211 is used to perform data communication control with the mobile terminal 201 and to store the control data in the memory 213. The radio frequency chip 212 is communicatively connected to the second communication module 230 for transmitting and receiving the control data.

[0089] In one possible implementation of this disclosure, the Bluetooth chip 211 and the radio frequency chip 212 can communicate via SPI or IIC.

[0090] Therefore, in this embodiment, the first microcontroller 210 includes a Bluetooth chip 211 and an RF chip 212. The Bluetooth chip 211 is the main chip, which is used to process input signals and output control commands. The RF chip 212 is used to control the reception of RF data. The two can communicate with each other via SPI or IIC.

[0091] The second communication module 230 in the handheld device 200 includes an LF transmitter 231 and an RF receiver 232.

[0092] The LF transmitter 231 is connected to the first microcontroller 210 and is used to send a low-frequency signal to the tire pressure sensor 300 to transmit the control data of the tire pressure sensor 300; the RF receiver 232 is used to receive radio frequency signals from the tire pressure sensor 300.

[0093] The third communication module 310 in the tire pressure sensor 300 includes an LF receiver 311 and an RF transmitter 312.

[0094] The LF receiver 311 is connected to the second microcontroller 320 and is used to receive low-frequency signals from the handheld device 200 to receive control data from the tire pressure sensor 300; the RF transmitter 312 is connected to the second microcontroller 320 and is used to send radio frequency signals from the tire pressure sensor 300 to the handheld device 200.

[0095] Specifically, the LF transmitter 231 is used to transmit low-frequency signals, such as a 125kHz low-frequency signal, to establish communication with the tire pressure sensor 300. The low-frequency signal transmitted by the LF transmitter 231 contains the control data of the tire pressure sensor 300, thereby achieving the purpose of transmitting the control data of the tire pressure sensor 300 to the tire pressure sensor 300. The RF receiver 232 is used to receive the 300MHz / 315MHz radio frequency signal from the tire pressure sensor.

[0096] In this embodiment, the handheld device 200 does not require a large-capacity data storage 213, nor does it require complex function keys and a display screen, thus greatly reducing the cost of the handheld device 200.

[0097] In addition, in this embodiment, the handheld device 200 may also be equipped with multiple function buttons, such as offline programming and reading buttons. The programming file, LF reading command and RF receiving configuration are stored in the first microcontroller 210 of the handheld device 200 in advance. Even when the handheld device 200 is disconnected from the mobile terminal 201, the tire pressure sensor 300 can still be programmed, upgraded and read data can still be transmitted.

[0098] In this embodiment, the second microcontroller 320 is used to control data transmission and reception; in one possible implementation of this disclosure, the second microcontroller 320 includes a tire pressure monitoring chip.

[0099] In this embodiment, the LF receiver 311 is connected to the second microcontroller 320 and is used to receive low-frequency signals from the handheld device 200 to receive control data from the tire pressure sensor 300; the RF transmitter 312 is connected to the second microcontroller 320 and is used to send radio frequency signals from the tire pressure sensor 300 to the handheld device 200.

[0100] In this embodiment, after the receiver 311 in the tire pressure sensor 300 receives the 125kHz low-frequency signal sent by the handheld device 200, the RF transmitter 312 in the tire pressure sensor 300 sends a 3123MHz or 315MHz radio frequency signal as a response to the handheld device 200. After the RF receiver 232 in the handheld device 200 receives the RF data transmitted by the RF transmitter 312 of the tire pressure sensor 300, the handheld device 200 transmits the read RF data to the mobile terminal 201 via the Bluetooth module 240. After receiving the RF data from the handheld device 200, the mobile terminal 201 parses the RF data according to the RF protocol parsing field corresponding to the vehicle model obtained from the server 100 and displays it on the mobile terminal 201.

[0101] Figure 4This diagram illustrates the principle structure of a handheld device 200 transmitting low-frequency data to a tire pressure sensor 300 in a data transmission device according to an embodiment of this disclosure. Figure 3 As shown, in one possible implementation of this disclosure, the LF transmitter 231 in the handheld device 200 includes: a low-frequency oscillation circuit 2311, a low-frequency modulation circuit 2311, a low-frequency power amplifier circuit 2313, and a low-frequency antenna 2341.

[0102] The low-frequency oscillation circuit 2311 is used to generate a low-frequency carrier signal. The low-frequency oscillation circuit 2311 generates a low-frequency (LF) carrier signal with a frequency of approximately 125kHz. In this embodiment, the low-frequency oscillation circuit 2311 includes, but is not limited to, a crystal oscillator, capacitor, inductor, etc., and generates a stable low-frequency oscillation signal through oscillation to provide a carrier for subsequent signal modulation.

[0103] In this embodiment, the low-frequency modulation circuit 2312 is connected to the oscillation circuit and is used to modulate the control data of the tire pressure sensor 300 to be transmitted onto the low-frequency carrier signal. The low-frequency modulation circuit 2312 changes the amplitude or frequency of the carrier signal according to the high or low level state of the control data, thereby realizing data modulation. The modulation method is, but is not limited to, amplitude shift keying (ASK), frequency shift keying (FSK), etc.

[0104] In this embodiment, the low-frequency power amplifier circuit 2313 is connected to the modulation circuit and is used to amplify the modulated low-frequency carrier signal to generate a low-frequency signal to be transmitted. The low-frequency power amplifier circuit 2313 amplifies the modulated low-frequency signal to ensure that the signal can be effectively transmitted to the tire pressure sensor 300. In this embodiment, the low-frequency power amplifier circuit 2313 includes a low-frequency power amplifier chip or transistor to amplify the input signal to sufficient power so as to reliably drive the low-frequency antenna 2341 to transmit signals within a certain distance.

[0105] In this embodiment, the low-frequency antenna 2341 is connected to the power amplifier circuit and is used to transmit the low-frequency signal in the form of electromagnetic waves so that it can be received by the tire pressure sensor 300. The low-frequency antenna 2341 is in the form of a coil, and its size and shape can be set according to the size and storage space of the handheld device 200.

[0106] To receive low-frequency signals from the handheld device 200, such as Figure 3 As shown, in one possible implementation of this disclosure, the LF receiver 311 in the tire pressure sensor 300 includes: a low-frequency receiving antenna 3114, a low-frequency signal amplification circuit 3113, a low-frequency filtering circuit 3112, and a low-frequency demodulation circuit 3111.

[0107] The low-frequency receiving antenna 3114 is used to receive low-frequency signals transmitted from the handheld device 200. In this embodiment, the frequency of the LF signal received by the low-frequency receiving antenna 3114 is about 125kHz. Signals of this frequency have strong penetrating power and can be received by the tire pressure sensor 300 within a certain distance.

[0108] In this embodiment, the low-frequency signal amplification circuit 3113 is connected to the low-frequency receiving antenna 3114 and is used to amplify the received low-frequency signal. Since the LF signal attenuates during transmission, the low-frequency signal amplification circuit 3113 is needed to increase the signal amplitude. The low-frequency signal amplification circuit 3113 amplifies the weak received LF signal so that it can be processed by subsequent circuits.

[0109] In this embodiment, the low-frequency signal amplification circuit 3113 uses an operational amplifier (op-amp) to achieve the amplification function. The operational amplifier can be configured as a non-inverting amplifier or an inverting amplifier. By selecting appropriate feedback resistors and input resistors, the required amplification factor can be achieved. For example, for a simple non-inverting amplifier, its amplification factor is 1 + Rf / Ri, where Rf is the feedback resistor and Ri is the input resistor.

[0110] In this embodiment, the low-frequency filtering circuit 3112 is connected to the low-frequency signal amplification circuit 3113 and is used to filter the amplified low-frequency signal.

[0111] In real-world environments, electromagnetic interference of various frequencies may exist. The low-frequency filter circuit 3112 ensures that only signals within a specific frequency range pass through. The low-frequency filter circuit 3112 removes high-frequency interference and noise from the LF signal, extracting the useful signal components.

[0112] In this embodiment, the low-frequency filtering circuit 3112 employs a bandpass filter, the passband frequency range of which is designed to match the frequency of the LF signal. The bandpass filter can be composed of components such as capacitors, inductors, and resistors.

[0113] In this embodiment, the low-frequency demodulation circuit 3111 is connected to the low-frequency filtering circuit 3112, and is used to demodulate the tire pressure sensor 300 control data from the filtered low-frequency signal; wherein, the demodulation circuit includes an envelope detector or a frequency discriminator.

[0114] The low-frequency demodulation circuit 3111 demodulates the tire pressure sensor 300 control data from the amplified and filtered LF signal. The type of the low-frequency demodulation circuit 3111 depends on the modulation method used when the handheld device 200 transmits the LF signal. If the modulation method is amplitude shift keying (ASK), the low-frequency demodulation circuit 3111 can use envelope detection. The envelope detector extracts the envelope of the signal through a circuit consisting of a diode and a capacitor, thereby recovering the original digital signal. If it is frequency shift keying (FSK) modulation, the low-frequency demodulation circuit 3111 can use a frequency discriminator to recover the data by detecting changes in the signal frequency.

[0115] Figure 5 This diagram illustrates the principle structure of a data transmission device for a tire pressure sensor 300 in one embodiment of this disclosure, showing the tire pressure sensor 300 transmitting radio frequency data to a handheld device 200. (See diagram for details.) Figure 4 As shown, in one possible implementation of this disclosure, the RF transmitter 312 in the tire pressure sensor 300 includes: a radio frequency oscillator 3121, a radio frequency modulation circuit 3122, a radio frequency power amplifier circuit 3123, and a radio frequency antenna 3124.

[0116] The radio frequency oscillator 3121 is used to generate a radio frequency carrier signal. Specifically, in this embodiment, the radio frequency oscillator 3121 uses a crystal oscillator (crystal oscillator) to achieve a stable frequency output. The crystal oscillator generates a stable oscillation frequency through the piezoelectric effect, and then adjusts it to the desired RF carrier frequency through a frequency divider or multiplier circuit. For example, a 433MHz RF oscillator can be implemented using a crystal oscillator and a corresponding frequency multiplier circuit.

[0117] In this embodiment, the radio frequency modulation circuit 3122 is connected to the radio frequency oscillator 3121 and is used to modulate the data collected by the tire pressure sensor 300 onto the radio frequency carrier signal.

[0118] The radio frequency modulation circuit 3122 modulates the data (such as tire pressure, temperature and other information) collected by the tire pressure sensor 300 onto the radio frequency (RF) carrier signal so that it can be wirelessly transmitted to the handheld device 200.

[0119] The radio frequency modulation circuit 3122 employs different designs depending on the modulation method. For example, when using amplitude modulation (AM), data can be represented by changing the amplitude of the carrier signal; when using frequency modulation (FM), data can be represented by changing the frequency of the carrier signal. In this embodiment, the radio frequency modulation circuit 3122 includes digital logic circuits and analog circuits. The digital logic circuits are used for data encoding and modulation control, while the analog circuits are used for carrier signal modulation.

[0120] In this embodiment, the radio frequency power amplifier circuit 3123 is connected to the radio frequency modulation circuit 3122 and is used to amplify the modulated radio frequency carrier signal to generate a radio frequency signal to be transmitted.

[0121] The radio frequency power amplifier circuit 3123 amplifies the modulated RF signal to sufficient power so that it can be effectively transmitted to the handheld device 200. The performance of the radio frequency power amplifier circuit 3123 directly affects the signal transmission distance and reliability.

[0122] Specifically, the radio frequency power amplifier circuit 3123 includes a power amplifier chip or transistor to amplify the input RF signal to a higher power level. For example, the power amplifier chip achieves power amplification through its internal amplification and matching circuits. The radio frequency power amplifier circuit 3123 also needs to consider heat dissipation by configuring a heat dissipation unit to ensure stable operation at high power output.

[0123] In this embodiment, the radio frequency antenna 3124 is connected to the radio frequency power amplifier circuit 3123 to transmit the radio frequency signal in the form of electromagnetic waves so that it can be received by the handheld device 200.

[0124] In this embodiment, the radio frequency antenna 3124 can be of various types, such as a dipole antenna or a patch antenna. In this embodiment, the design of the radio frequency antenna 3124 needs to consider factors such as its operating frequency, gain, and directivity. For example, a 433MHz patch antenna can achieve good transmission performance through reasonable design of its size and shape. In this embodiment, the radio frequency antenna 3124 needs to be impedance matched with the radio frequency power amplifier circuit 3123 to ensure maximum power transmission efficiency.

[0125] To receive radio frequency signals from the tire pressure sensor 300, such as Figure 4 As shown, in one possible implementation of this disclosure, the RF receiver 232 includes: an RF receiving antenna 2325, an RF signal amplifier 2324, a down-conversion circuit 2323, an RF filtering circuit 2322, and an RF demodulation circuit 2321.

[0126] The radio frequency receiving antenna 2325 is used to receive the radio frequency signal emitted by the tire pressure sensor 300. The performance of the radio frequency receiving antenna 2325 directly affects the sensitivity and reliability of signal reception. Its design needs to consider factors such as operating frequency, gain, and directivity to ensure that the weak signal emitted by the tire pressure sensor 300 can be effectively captured.

[0127] In this embodiment, the radio frequency signal amplifier 2324 is connected to the radio frequency receiving antenna 2325 and is used to amplify the received radio frequency signal.

[0128] In this embodiment, the down-conversion circuit 2323 is connected to the low-noise amplifier and is used to convert the amplified high-frequency radio frequency signal into an intermediate frequency (IF) signal. The down-conversion circuit 2323 converts the high-frequency RF signal into a lower-frequency IF signal. In this embodiment, the down-conversion circuit 2323 consists of a mixer and a local oscillator circuit. The mixer multiplies the RF signal with the local oscillator signal to obtain a lower-frequency IF signal, which facilitates subsequent signal processing and demodulation.

[0129] In this embodiment, the RF filtering circuit 2322 is connected to the down-conversion circuit 2323 and is used to filter the down-converted intermediate frequency signal. The RF filtering circuit 2322 filters the down-converted IF signal, removing useless frequency components and interference signals, and extracting useful signal components. In this embodiment, the RF filtering circuit 2322 is a bandpass filter, and its passband frequency range is designed according to the frequency characteristics of the IF signal, which can effectively suppress out-of-band interference and improve signal quality.

[0130] In this embodiment, the RF demodulation circuit 2321 is connected to the RF filtering circuit 2322, and demodulates the original tire pressure sensor 300 data from the filtered intermediate frequency signal. The RF demodulation circuit 2321 demodulates the original tire pressure sensor 300 data from the filtered IF signal. The type of the RF demodulation circuit 2321 depends on the modulation method used by the tire pressure sensor 300's transmitted signal; the demodulation method of the RF demodulation circuit 2321 may include envelope detection, coherent demodulation, etc.

[0131] In this embodiment, the burn-in files, LF read commands, RF receive configurations, and RF protocol parsing fields corresponding to different vehicle models are all stored on the server 100. The mobile terminal 201 obtains data from the server 100 one-to-one through a 4G or 5G network or Wi-Fi signal. The mobile terminal 201 and the handheld device 200 establish a connection and complete data transmission through Bluetooth signal. The handheld device 200 and the tire pressure sensor 300 complete data interaction through low-frequency and radio-frequency signals. When a user needs to upgrade the software of the tire pressure sensor 300 and read tire pressure information, they can directly select the corresponding vehicle model through the mobile terminal 201. Then, the user can obtain the burn-in file, LF read command, RF receive configuration, and RF protocol parsing field corresponding to the vehicle model protocol from the server 100. The mobile terminal 201 transmits the information obtained from the server 100 to the handheld device 200 via Bluetooth. The handheld device 200 then completes the software upgrade and tire pressure information reading data transmission of the tire pressure sensor 300 through low-frequency and radio frequency signals. In addition, the handheld device 200 can send the software upgrade status and tire pressure reading information sent by the tire pressure sensor 300 to the mobile terminal 201 via Bluetooth, and the mobile terminal 201 displays the information accordingly.

[0132] Figure 6 This diagram illustrates the principle of transmitting programming data in the data transmission device of the tire pressure sensor 300 according to an embodiment of this disclosure. Figure 6 As shown, the data transmission process during software programming of the tire pressure sensor 300 of this utility model is as follows:

[0133] 1) When the user turns on the handheld device 200, the Bluetooth module 240 in the handheld device 200 periodically sends Bluetooth scanning broadcast signals. At the same time, the user turns on the mobile phone, turns on the mobile phone Bluetooth and network connection, and enters the mobile phone Bluetooth scanning interface. When the mobile phone scans the Bluetooth broadcast signal sent by the handheld device 200, the mobile phone can quickly establish a connection with the handheld device 200.

[0134] 2) Users can select the vehicle model on their mobile phone display or by pressing buttons. Based on the vehicle model information / OE part number, they can access the tire pressure sensor 300 programming interface. Users can determine the required programming ID for the tire pressure sensor 300 using one of three methods: copying the old part ID, manually creating an ID, or automatically creating an ID. The mobile phone transmits the tire pressure sensor 300 programming ID to the handheld device 200 via Bluetooth for storage. The handheld device 200 then replies with a status update regarding the sensor programming ID transmission.

[0135] 3) The mobile phone establishes a connection with the server 100 through a 4G / 5G network or Wi-Fi signal. The mobile phone sends instructions to the server 100 according to the parameters such as the vehicle model selected by the user. The server 100 obtains the burn-in file one-to-one according to the parameter information and sends it to the mobile phone.

[0136] 4) The mobile phone starts the burn-in file transfer and transmits the burn-in file to the Bluetooth module 240 in the handheld device 200 via Bluetooth. After receiving the burn-in file, the Bluetooth module 240 in the handheld device 200 stores the burn-in file in the built-in memory 213 of the handheld device 200. After the handheld device 200 determines that the burn-in file storage is complete, it replies to the mobile phone with the burn-in file transfer status.

[0137] 5) The handheld device 200 begins transmitting programming data to the tire pressure sensor 300, including:

[0138] 5-1) The LF transmitter module of the handheld device 200 sends a 125kHz low-frequency signal to establish communication with the tire pressure sensor 300. The low-frequency signal sent by the handheld device 200 contains burn-in file information.

[0139] 5-2) After the LF receiving module of the tire pressure sensor 300 receives the 125kHz low-frequency signal sent by the handheld device 200, it writes the burn-in process file information contained in the low-frequency signal into the tire pressure sensor 300. The tire pressure sensor 300 determines whether the burn-in process has ended. If the burn-in process has ended, the RF transmitter 312 of the tire pressure sensor 300 responds with 433MHz / 315MHz radio frequency data to inform the handheld device 200 of the burn-in process status.

[0140] 5-3) After the RF receiving module of the handheld device 200 receives the RF data transmitted by the RF transmitting module of the tire pressure sensor 300, the handheld device 200 can determine whether the burning process is complete and transmit the burning process status to the mobile phone via Bluetooth.

[0141] 6) After receiving the programming status information from the handheld device 200, the mobile phone displays the programming status on the phone, informing the customer whether the programming was successful or failed, and ends the software upgrade of the tire pressure sensor 300.

[0142] Figure 7 This diagram illustrates the transmission of tire pressure sensor 300 information data by a data transmission device for the tire pressure sensor 300 according to an embodiment of this disclosure. Figure 7 As shown, the data transmission process for reading information from the tire pressure sensor 300 of this utility model is as follows:

[0143] 1) When the user turns on the handheld device 200, the Bluetooth module 240 in the handheld device 200 periodically sends Bluetooth scanning broadcast signals. At the same time, the user turns on the mobile phone, turns on the mobile phone Bluetooth and network connection, and enters the mobile phone Bluetooth scanning interface. When the mobile phone scans the Bluetooth broadcast signal sent by the handheld device 200, the mobile phone can quickly establish a connection with the handheld device 200.

[0144] 2) Users can select the vehicle model via their mobile phones and access the tire pressure sensor 300 information based on the vehicle model information / OE part number information;

[0145] 3) The mobile phone establishes a connection with the server 100 through a 4G / 5G network or Wi-Fi signal. The mobile phone sends instructions to the server 100 based on the vehicle model and other parameter information selected by the user. The server 100 obtains the LF reading command, RF receiving configuration and RF protocol parsing field corresponding to the vehicle model one-to-one based on the parameter information and sends them to the mobile phone.

[0146] 4) The mobile phone transmits the LF read command and RF receive configuration corresponding to the vehicle model to the Bluetooth module 240 in the handheld device 200 via Bluetooth. After receiving the information, the Bluetooth module 240 in the handheld device 200 stores the LF read command and RF receive configuration in the memory 213 built into the MCU of the handheld device 200. After the MCU of the handheld device 200 determines that the LF read command and RF receive configuration have been stored, it replies to the mobile phone with the transmission status.

[0147] 5) The handheld device 200 begins reading tire pressure information from the tire pressure sensor 300, including:

[0148] 5-1) The LF transmitter module of the handheld device 200 sends a 125kHz low-frequency signal to establish communication with the tire pressure sensor 300. The low-frequency signal sent by the handheld device 200 contains the LF read command.

[0149] 5-2) After the LF receiving module of the tire pressure sensor 300 receives the 125kHz low-frequency signal sent by the handheld device 200, the RF transmitting module of the tire pressure sensor 300 sends 433MHz / 315MHz radio frequency data in response.

[0150] 5-3) After the RF receiving module of the handheld device 200 receives the RF data transmitted by the RF transmitter 312 of the tire pressure sensor 300, the handheld device 200 transmits the read RF information to the mobile phone via Bluetooth.

[0151] 6) After receiving the tire pressure reading information from the handheld device 200, the mobile phone parses the tire pressure information according to the RF protocol parsing field corresponding to the vehicle model obtained from the server 100, and displays the tire pressure information on the mobile phone.

[0152] In summary, the data transmission device for the tire pressure sensor provided in this embodiment of the present disclosure obtains control data for different vehicle models from the server by setting up a dedicated handheld device for the tire pressure sensor. The handheld device does not require a large-capacity data storage device, nor does it require complex function buttons and a display screen, which greatly reduces tool costs and enhances the convenience of the tire pressure sensor in obtaining control data for different vehicle models.

[0153] The above embodiments are merely illustrative of the principles and effects of this disclosure and are not intended to limit this disclosure. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this disclosure. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this disclosure should still be covered by the claims of this disclosure.

Claims

1. A data transmission device for a tire pressure sensor, characterized in that: include: Servers, network-enabled handheld devices, and tire pressure sensors; among which: The server stores tire pressure sensor control data for different vehicle models, which can be used to upgrade the tire pressure sensors or read the data. The handheld device includes: A first communication module is wirelessly connected to the server to transmit the tire pressure sensor control data of the corresponding vehicle model in the server to the handheld device. The first microcontroller is communicatively connected to the first communication module and is used for storing and transmitting control data in tire pressure upgrade mode or tire pressure data reading mode. The second communication module is connected to the first microcontroller and is used to communicate data with the tire pressure sensor. The tire pressure sensor includes: The third communication module is used to transmit data with the first communication module in the handheld device; The second microcontroller, connected to the second communication module, is used to store and transmit the control data, and then perform tire pressure upgrade or tire pressure data reading based on the control data.

2. The data transmission device for the tire pressure sensor according to claim 1, characterized in that: The first communication module is independently located within a mobile terminal, and the handheld device also includes a Bluetooth module: The mobile terminal establishes a wireless communication connection with the server and a Bluetooth connection with the handheld device via the Bluetooth module, transmitting the tire pressure sensor control data of the corresponding vehicle model from the server to the handheld device.

3. The data transmission device for the tire pressure sensor according to claim 2, characterized in that: The first microcontroller includes a Bluetooth chip, an RF chip for controlling the transmission of RF signals, and a memory; the Bluetooth chip is used for data communication control with the mobile terminal and for storing the control data in the memory, and the RF chip is communicatively connected to the second communication module for transmitting and receiving the control data.

4. The data transmission device for the tire pressure sensor according to claim 3, characterized in that: The Bluetooth chip and the radio frequency chip are either integrated into one unit or are separate units.

5. The data transmission device for the tire pressure sensor according to claim 3, characterized in that: The Bluetooth chip and the RF chip communicate via SPI or IIC.

6. The data transmission device for the tire pressure sensor according to claim 1 or 2, characterized in that: The first communication module establishes a wireless communication connection with the server via a 4G / 5G network or a Wi-Fi signal.

7. The data transmission device for the tire pressure sensor according to claim 1, characterized in that: The second communication module includes: An LF transmitter, connected to the first microcontroller, is used to send a low-frequency signal to the tire pressure sensor to transmit the tire pressure sensor control data; RF receiver for receiving radio frequency signals from the tire pressure sensor; The third communication module includes: An LF receiver, connected to the second microcontroller, is used to receive low-frequency signals from the handheld device to receive the tire pressure sensor control data; An RF transmitter, connected to the second microcontroller, is used to send radio frequency signals from the tire pressure sensor to the handheld device.

8. The data transmission device for the tire pressure sensor according to claim 1, characterized in that: The second microcontroller includes a tire pressure monitoring chip.

9. The data transmission device for the tire pressure sensor according to claim 2, characterized in that: The mobile terminal is a smartphone or a tablet computer with mobile communication or internet access capabilities.

10. The data transmission device for the tire pressure sensor according to claim 1, characterized in that: The control data includes burn-in files corresponding to different vehicle models, LF read commands, RF receive configurations, and RF protocol parsing fields.

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