Tire pressure sensor based on pressure power generation
By installing a pressure-generating component inside the tire, the tire rotation generates current to charge the tire pressure sensor, solving the problem of battery power limitation. This enables a tire pressure sensor that is easy to install and can operate for extended periods, reducing maintenance costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NINGBO SIMING AUTOMOTIVE CO LTD
- Filing Date
- 2025-07-22
- Publication Date
- 2026-07-21
Smart Images
Figure CN224528356U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of automotive tire pressure detection technology, specifically a tire pressure sensor based on pressure power generation. Background Technology
[0002] Tire pressure directly affects the driving safety of motor vehicles (such as cars or motorcycles). Therefore, tire pressure sensors are generally installed in the tires of motor vehicles. While the vehicle is in motion, the tire pressure sensor automatically monitors the tire pressure in real time and sends the monitoring data (usually including temperature and tire pressure) to a receiver inside the vehicle. The driver can judge the safety condition of the vehicle's tires by observing the data on the display platform or by hearing an alarm sound from the receiver. Common tire pressure sensors on the market are divided into two types: direct sensors and indirect sensors.
[0003] However, both built-in and external tire pressure sensors use button batteries due to size limitations. The biggest characteristic of button batteries is their low power consumption. Due to this limitation, the sampling frequency and data transmission frequency can only be reduced to extend battery life, but this significantly reduces the real-time performance of tire pressure monitoring. Furthermore, when the battery is depleted, the tire needs to be removed to replace the battery inside the sensor. For sensors whose batteries cannot be replaced, a new sensor needs to be installed, which is time-consuming, labor-intensive, and wastes resources.
[0004] Therefore, since it does not meet the existing requirements, we propose a tire pressure sensor based on pressure power generation. Utility Model Content
[0005] This invention provides a tire pressure sensor based on pressure power generation, which has the advantages of convenient installation and low maintenance cost, and solves the problems mentioned in the background art.
[0006] This utility model provides the following technical solution: a tire with a tire pressure sensor and a pressure generating device, comprising a tire and a tire pressure sensor, wherein the tire pressure sensor is disposed inside the tire, characterized in that: the tire pressure sensor is connected via a wire to a pressure generating component disposed within the tire wall, the pressure generating component comprising a metallic elastic layer, and piezoelectric upper and lower layers respectively disposed on both sides of the metallic elastic layer, wherein the piezoelectric upper layer is located on the side facing the interior of the tire cavity; the tire pressure sensor comprises a sensor upper cover, the interior of which is disposed a PCBA board with a power storage function, and a sensor lower cover which is fitted to the bottom of the sensor upper cover, the sensor lower cover having a rubber adhesive sheet for adhering to the inner wall of the tire, the pressure generating component providing current to the tire pressure sensor, and the tire pressure sensor detecting the internal pressure of the tire.
[0007] As an optional solution for a tire pressure sensor based on pressure power generation according to this utility model, the material of the metal elastic layer is brass, and both the upper and lower piezoelectric layers are made of PZT piezoelectric ceramic material.
[0008] As an optional solution for a tire pressure sensor based on pressure power generation according to this utility model, the piezoelectric upper layer and piezoelectric lower layer are connected in parallel to serve as one output pole, while the metal elastic layer is the other output pole, and the two poles are connected by a male connector via a wire.
[0009] As an optional solution for a tire pressure sensor based on pressure power generation according to this utility model, the sensor cover is connected to a wiring female, and the connection female 41 is connected to a voltage stabilizing rectifier bridge through a wire.
[0010] As an optional solution for a tire pressure sensor based on pressure power generation according to this utility model, the male connector and the female connector are matched and electrically connected to each other, and both have waterproof components on their outer walls.
[0011] As an optional solution for a tire pressure sensor based on pressure power generation according to this utility model, the tire includes, from the outside to the inside, a tread, a covering layer, a ply layer and an airtight layer, and the rubber adhesive sheet on the lower cover of the sensor is fixed to the airtight layer by a vulcanizing agent.
[0012] As an optional solution for a tire pressure sensor based on pressure power generation according to this utility model, the pressure power generation component is disposed between the cover layer and the ply layer.
[0013] This utility model has the following beneficial effects:
[0014] 1. In this type of tire pressure sensor based on pressure power generation, a pressure power generation component is built into the tire. When the tire is rotating, the pressure power generation component continuously generates electricity to charge the tire pressure sensor, thereby providing the working current for the tire pressure sensor and extending the working time of the tire pressure sensor.
[0015] 2. This type of tire pressure sensor based on pressure power generation eliminates the need to remove the tire to replace the battery or tire pressure sensor, enhancing the user experience, reducing maintenance costs, and minimizing resource waste.
[0016] 3. In this type of tire pressure sensor based on pressure power generation, the bottom of the sensor cover has a rubber adhesive piece that can be easily attached to the inner wall of the tire where the pressure power generation component is fixed, making installation convenient. Moreover, the sensor cover and sensor bottom cover are snapped together, and the rubber adhesive piece is set on its outer wall structure, which can effectively reduce the impact of tire deformation when in contact with the ground on the installation stability of the tire pressure sensor. Furthermore, since the tire pressure sensor is installed in the inner wall of the tire, when the car is moving, the tire pressure sensor will be more firmly fixed to the inner wall due to the centrifugal force. Attached Figure Description
[0017] Figure 1 This is a cross-sectional structural schematic diagram of the pressure power generation component of this utility model;
[0018] Figure 2 This is a cross-sectional view of the metal elastic layer of this utility model.
[0019] Figure 3 This is a cross-sectional structural diagram of the tire of this utility model;
[0020] Figure 4 This is a schematic diagram of the main structure of the waterproof component of this utility model;
[0021] Figure 5 This is the voltage regulator circuit diagram of this utility model.
[0022] In the diagram: 1. Tire; 11. Tread; 12. Cover layer; 13. Cord layer; 14. Airtight layer; 2. Tire pressure sensor; 21. Sensor top cover; 22. Sensor bottom cover; 3. Pressure generator component; 31. Metal elastic layer; 32. Piezoelectric upper layer; 33. Piezoelectric lower layer; 4. Waterproof component; 41. Female connector; 42. Male connector. Detailed Implementation
[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0024] Example 1 aims to address the issue that both internal and external tire pressure sensors rely on button batteries due to size limitations. The main drawback of button batteries is their low power consumption. Currently, this limitation necessitates reducing the sampling and data transmission frequency to extend battery life, but this significantly compromises the real-time performance of tire pressure monitoring. Please refer to [link to relevant documentation]. Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 A tire pressure sensor based on pressure power generation includes a tire 1 and a tire pressure sensor 2. The tire pressure sensor 2 is disposed inside the tire 1. The tire pressure sensor 2 is connected to a pressure power generation component 3 disposed inside the wall of the tire 1 via a wire. The pressure power generation component 3 includes a metal elastic layer 31. A piezoelectric upper layer 32 and a piezoelectric lower layer 33 are respectively provided on both sides of the metal elastic layer 31. The piezoelectric upper layer 32 is located on the side facing the inside of the tire 1 cavity.
[0025] The tire pressure sensor 2 includes a sensor cover 21, inside which is a PCBA board with a power storage function. The bottom of the sensor cover 21 is provided with a sensor cover 22 that is fitted with it. The sensor cover 22 is provided with a rubber adhesive sheet for adhering to the inner wall of the tire 1. The pressure generating component 3 provides current to the tire pressure sensor 2, and the tire pressure sensor 2 detects the internal pressure of the tire 1.
[0026] In this embodiment: by placing the pressure power generation component 3 inside the tire 1, when the tire 1 contacts the ground, it will squeeze the pressure power generation component 3. Thus, when the tire rotates, the reciprocating pressure of the ground on the pressure power generation component 3 will generate current. After rectification and coupling, the generated electricity is stored in the tire pressure sensor 2 to continuously charge the battery, thereby extending the working time of the pressure power generation-based tire pressure sensor.
[0027] The working principle of this embodiment: During the vehicle's operation, when tire 1... Figure 3 Position rotated to Figure 4 The tire 1, with the pressure generating component 3 fixed in place, contacts the ground and is subjected to pressure, which is transmitted to the pressure generating component 3, causing the pressure generating component 3 to bend and deform. The piezoelectric lower layer 33 inside the tire 1 is deformed by the pressure, and the tensile force causes the piezoelectric upper layer 32 to deform as well. At this time, the PZT piezoelectric ceramic generates lateral stress. Due to the electromechanical coupling characteristics of the piezoelectric element, charges will be generated on the electrode surface. The converted electrical energy is stored through filtering, rectification, and voltage regulation by the voltage regulator component. Furthermore, since the sensor cover 21 is equipped with a PCBA board with energy storage function, the pressure generating component 3 can generate a safe and reliable current to charge the tire pressure sensor 2, thereby improving the service life of the tire pressure sensor.
[0028] Example 2 aims to address how to ensure the proper functioning of this pressure-generated tire pressure sensor while further reducing maintenance difficulty and operating costs. This example is an improvement upon Example 1. For details, please refer to [link to example]. Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5The tire 1 includes, from the outside to the inside, a tread 11, a cover layer 12, a ply layer 13, and an airtight layer 14. The rubber adhesive on the sensor cover 22 is fixed to the airtight layer 14 by a vulcanizing agent. The pressure generating component 3 is disposed between the cover layer 12 and the ply layer 13. The bottom of the sensor cover 22 of the tire pressure sensor 2 is provided with a rubber adhesive, which can be freely pasted near the inner wall of the tire 1 where the pressure generating component 3 is fixed, making it easy to install. Furthermore, the tire pressure sensor 2 is installed in the inner wall of the tire 1. When the car is moving, due to the centrifugal force, the tire pressure sensor 2 will be more firmly fixed to its inner wall.
[0029] The metal elastic layer 31 is made of brass. The piezoelectric upper layer 32 and piezoelectric lower layer 33 are both made of PZT piezoelectric ceramic. The piezoelectric upper layer 32 and piezoelectric lower layer 33 are connected in parallel as one output pole, while the metal elastic layer 31 is the other output pole. The two poles are connected by a male connector 42 through a wire. The sensor cover 21 is connected to a female connector 41. The female connector 41 is connected to a voltage regulator rectifier bridge through a wire. The male connector 42 and the female connector 41 are matched and electrically connected to each other, and both of them are provided with waterproof components 4 on their outer walls.
[0030] In this embodiment: the pressure power generation component 3 is a three-layer arched piezoelectric element, with a metal elastic layer 31 in the middle. Piezoelectric ceramics are attached to its upper and lower surfaces as the upper piezoelectric layer 32 and the lower piezoelectric layer 33. The metal elastic layer 31 is made of brass, and the piezoelectric layers 32 and 33 are made of PZT piezoelectric ceramics. The upper piezoelectric layer 32 and the lower piezoelectric layer 33 are connected in parallel as one output pole, while the metal elastic layer 31 is the other output pole. The two poles are connected to the female connector 41 of the pressure power generation component 3 through the male connector 42. The male connector 42 passes through the curtain layer 13 and the airtight layer 14, and each of them is provided with a waterproof component 4 for waterproofing.
[0031] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.
[0032] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.
Claims
1. A tire pressure sensor based on pressure-generated electricity, comprising a tire (1) and a tire pressure sensor (2), wherein the tire pressure sensor (2) is disposed inside the tire (1), characterized in that: The tire pressure sensor (2) is connected via a wire to a pressure generating component (3) disposed in the wall of the tire (1). The pressure generating component (3) includes a metal elastic layer (31). A piezoelectric upper layer (32) and a piezoelectric lower layer (33) are respectively provided on both sides of the metal elastic layer (31). The piezoelectric upper layer (32) is located on the side facing the inside of the tire (1) cavity. The tire pressure sensor (2) includes a sensor cover (21), inside which is a PCBA board with a power storage function. The bottom of the sensor cover (21) is provided with a sensor cover (22) that engages with it. The sensor cover (22) is provided with a rubber adhesive sheet for adhering to the inner wall of the tire (1). The pressure generating component (3) provides current to the tire pressure sensor (2), and the tire pressure sensor (2) detects the internal pressure of the tire (1).
2. The tire pressure sensor based on pressure power generation according to claim 1, characterized in that: The metal elastic layer (31) is made of brass, and the piezoelectric upper layer (32) and piezoelectric lower layer (33) are both made of PZT piezoelectric ceramic.
3. A tire pressure sensor based on pressure-generated electricity according to claim 2, characterized in that: The piezoelectric upper layer (32) and piezoelectric lower layer (33) are connected in parallel as one output pole, while the metal elastic layer (31) is the other output pole. The two poles are connected by a male connector (42) through a wire.
4. A tire pressure sensor based on pressure-generated electricity according to claim 1, characterized in that: The sensor cover (21) is connected to a female connector (41), and the female connector (41) is connected to a voltage regulator bridge via a wire.
5. A tire pressure sensor based on pressure-generated electricity according to claim 4, characterized in that: The male connector (42) and the female connector (41) are matched and electrically connected, and both have waterproof components (4) on their outer walls.
6. A tire pressure sensor based on pressure power generation according to claim 1, characterized in that: The tire (1) includes, from the outside to the inside, a tread (11), a cover layer (12), a ply layer (13), and an airtight layer (14). The rubber adhesive sheet on the sensor lower cover (22) is fixed to the airtight layer (14) by a vulcanizing agent.
7. A tire pressure sensor based on pressure power generation according to claim 1, characterized in that: The pressure power generation component (3) is disposed between the cover layer (12) and the curtain layer (13).