Antenna assembly for tire pressure sensor and tire pressure sensor

Abstract

The utility model discloses an antenna assembly for a tire pressure sensor and the tire pressure sensor. The antenna assembly comprises a circuit board and an antenna group, the antenna group is arranged on one side of the circuit board and electrically connected with the circuit board, and the antenna group at least comprises a turn of first antenna and a turn of second antenna. According to the antenna assembly provided by the embodiment of the utility model, through the design of the double antennas, after the two antennas are electrically connected, the length of the whole antenna is twice that of an original single antenna, and the antenna assembly can have better directivity and higher radiation efficiency.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of vehicle sensors, and particularly relates to an antenna assembly for a tire pressure sensor and the tire pressure sensor. BACKGROUND

[0002] During driving, the occurrence of tire burst accidents is accidental and unpredictable, and once a tire burst occurs, a serious rollover accident is easily caused due to improper handling of the driver due to insufficient experience; moreover, the impact force generated by the tire burst can also cause irreparable loss to the surrounding people and objects. Therefore, it is of great significance to install a tire pressure monitoring system in a vehicle, especially a heavy commercial vehicle. In many countries, a tire pressure sensor is often used as a standard configuration of a vehicle to detect the internal pressure, temperature and the like of a vehicle tire in real time and transmit data to a driver in a cab to avoid traffic accidents caused by reasons such as insufficient, excessively high, leakage and excessively high temperature of a tire surface of the tire pressure, and to ensure the safety of driving.

[0003] At present, the tire pressure sensor of a passenger vehicle on the market is short in distance between the sensor in the tire and the tire pressure host in the vehicle, and is not high in requirement for communication distance, so a single LOOP antenna or a PCB antenna is usually used in the sensor. The distance between the sensor in the tire and the tire pressure host in the vehicle of a commercial vehicle is far, and in addition, a dense steel wire mesh in the tire forms a shielding cover, so the communication distance of the tire pressure sensor of a general passenger vehicle cannot meet the requirement of the commercial vehicle. CONTENT OF THE INVENTION

[0004] In order to overcome the defects of the prior art, the application provides an antenna assembly for a tire pressure sensor and the tire pressure sensor, which adopts a double-antenna design and can have better directivity and higher radiation efficiency.

[0005] The utility model provides a kind of antenna assembly for tire pressure sensor, comprising: circuit board and antenna group;

[0006] The antenna group is arranged on one side of the circuit board and electrically connected with the circuit board, and the antenna group comprises at least one turn of first antenna and one turn of second antenna.

[0007] Further, the first antenna and the second antenna are arranged in parallel.

[0008] Further, the planes where the first antenna and the second antenna are located are perpendicular to the circuit board.

[0009] Further, the first antenna comprises:

[0010] A first horizontal section is located on the top of the circuit board and on one side of the side surface of the circuit board.

[0011] a second horizontal section, the second horizontal section being located on the top of the circuit board and on the other side of the side direction of the circuit board;

[0012] a first vertical section, the first vertical section being located above the circuit board and on one side of the first horizontal section;

[0013] a second vertical segment, the second vertical segment being located above the circuit board and on one side of the second horizontal segment;

[0014] a first oblique section, the first oblique section being located above the circuit board and on one side of the first horizontal section;

[0015] a second oblique section, the second oblique section being located above the circuit board and on one side of the second horizontal section;

[0016] A vertical first protrusion structure is provided at the end of the first horizontal section, and a vertical second protrusion structure is provided at the end of the second horizontal section;

[0017] The first horizontal segment, the first vertical segment and the first oblique segment are connected by rounded corners, the second horizontal segment, the second vertical segment and the second oblique segment are connected by rounded corners, and the first oblique segment and the second oblique segment are connected by rounded corners.

[0018] Furthermore, the second antenna includes:

[0019] a third horizontal segment, the third horizontal segment being located on the top of the circuit board and on one side in a lateral direction of the circuit board;

[0020] a fourth horizontal segment, the fourth horizontal segment being located on the top of the circuit board and on the other side of the side direction of the circuit board;

[0021] a third vertical segment, the third vertical segment being located above the circuit board and on one side of the third horizontal segment;

[0022] a fourth vertical segment, the fourth vertical segment being located above the circuit board and on one side of the fourth horizontal segment;

[0023] a third oblique section, the third oblique section being located above the circuit board and on one side of the third horizontal section;

[0024] a fourth oblique section, the fourth oblique section being located above the circuit board and on one side of the fourth horizontal section;

[0025] A vertical third protrusion structure is provided at the end of the third horizontal segment, and a vertical fourth protrusion structure is provided at the end of the fourth horizontal segment;

[0026] The third horizontal segment, the third vertical segment and the third oblique segment are connected by rounded corners, the fourth horizontal segment, the fourth vertical segment and the fourth oblique segment are connected by rounded corners, and the third oblique segment and the fourth oblique segment are connected by rounded corners.

[0027] Furthermore, the first antenna and the second antenna form a rib structure with a rectangular cross-section.

[0028] Furthermore, a first through hole, a second through hole, a third through hole and a fourth through hole are provided on the circuit board; and a first antenna pad, a second antenna pad, a third antenna pad and a fourth antenna pad are provided on the back side of the circuit board at the first through hole, the second through hole, the third through hole and the fourth through hole.

[0029] Furthermore, the first antenna passes through the first through hole and the second through hole through the first protruding structure and the second protruding structure, respectively, and is electrically connected to the first antenna pad and the second antenna pad respectively;

[0030] The second antenna passes through the third through hole and the fourth through hole through the third protrusion structure and the fourth protrusion structure, respectively, and is electrically connected to the third antenna pad and the fourth antenna pad, respectively.

[0031] Furthermore, the circuit board is provided with a signal feeding point, a matching capacitor and a ground via;

[0032] The signal feed point is electrically connected to the first antenna pad; the second antenna pad and the third antenna pad are connected through a first feed line; the fourth antenna pad is connected to the matching capacitor through a second feed line; and the matching capacitor is connected to the ground via through a third feed line.

[0033] On the other hand, an embodiment of the present invention further provides a tire pressure sensor having an antenna assembly for a tire pressure sensor as described in the above embodiment.

[0034] The beneficial effects of the utility model are:

[0035] The tire pressure sensor antenna assembly provided by this embodiment features a dual-antenna design. When the two antennas are electrically connected, the combined length is twice that of a single antenna, resulting in improved directivity and higher radiation efficiency. Furthermore, the antenna is located on one side of the circuit board, resulting in a simple and compact structure that occupies little space. The antenna is wound in turns, meeting transmission performance requirements and extending the sensor's communication range, meeting the communication distance requirements of commercial vehicles. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The technical solutions and other beneficial effects of the present application will be apparent from the following detailed description of specific embodiments of the present application, taken in conjunction with the accompanying drawings.

[0037] Figure 1 A structure schematic view of an antenna assembly for a tire pressure sensor is provided in the embodiments of the present application.

[0038] Figure 2 A front surface schematic view of a circuit board of the antenna assembly for the tire pressure sensor is provided in the embodiments of the present application.

[0039] Figure 3 A back surface schematic view of the circuit board of the antenna assembly for the tire pressure sensor is provided in the embodiments of the present application.

[0040] Figure 4 A structure schematic view of a first antenna of the antenna assembly for the tire pressure sensor is provided in the embodiments of the present application.

[0041] The component labels in the figure are as follows: circuit board 1, signal feed 2, first antenna pad 3, second antenna pad 4, first feed line 5, third antenna pad 6, fourth antenna pad 7, second feed line 8, matching capacitor 9, third feed line 10, ground via 11, first antenna 12, second antenna 13, first horizontal section 121, second horizontal section 122, first vertical section 123, second vertical section 124, first inclined section 125, second inclined section 126, first protruding structure 127, and second protruding structure 128. DETAILED DESCRIPTION

[0042] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0043] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present application, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0044] In this utility model, unless otherwise specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be interpreted broadly. For example, they can refer to fixed, removable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; or internal communication between two components. A person skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances. In this utility model, unless otherwise specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. Furthermore, "above," "above," and "above" a first feature may include the first feature being directly above or diagonally above the second feature, or may simply mean that the first feature is at a higher level than the second feature. "Below," "below," and "below" a first feature may include the first feature being directly below or diagonally below the second feature, or may simply mean that the first feature is at a lower level than the second feature.

[0045] The present invention will now be further described with reference to the accompanying drawings and specific implementation methods.

[0046] Reference Figures 1 to 4 As shown, the antenna assembly for a tire pressure sensor provided in this embodiment includes a circuit board 1 and an antenna assembly. The antenna assembly is disposed on one side of the circuit board 1 and is electrically connected to the circuit board 1. The antenna assembly includes at least one turn of a first antenna 12 and one turn of a second antenna 13. The circuit board 1 can be a PCB substrate or other substrate.

[0047] The tire pressure sensor antenna assembly provided in this embodiment has an antenna group disposed on one side of the circuit board 1. This structure is simple and compact, requiring minimal space. Furthermore, the antenna is wound in turns, meeting radiation performance requirements. In this embodiment, the antenna group is wound in two turns, improving radiation efficiency.

[0048] In particular, the first antenna 12 and the second antenna 13 are arranged in parallel and side by side, and the planes on which the first antenna 12 and the second antenna 13 are located are perpendicular to the circuit board 1. Therefore, the antenna group can produce a mirror effect when close to the ground, improving the radiation performance of the antenna group and the reliability of radio frequency transmission.

[0049] In this embodiment, to facilitate installation and use of the antenna assembly, the antenna assembly is disposed on the upper surface of the circuit board 1. When the tire pressure sensor is installed in a vehicle tire, the upper surface faces the inner wall of the vehicle tire. In other words, the upper surface of the circuit board 1 refers to the surface of the circuit board 1 that faces the inner wall of the tire when the tire pressure sensor is installed in the vehicle tire. Thus, by disposing the antenna assembly on the upper surface of the circuit board 1, the antenna assembly protrudes toward the inner wall of the tire, thereby facilitating installation of the tire pressure sensor.

[0050] In particular, when the first antenna 12 and the second antenna 13 are mounted on the circuit board 1 , both the first antenna 12 and the second antenna 13 are perpendicular to the circuit board 1 .

[0051] like Figure 4 As shown, in one embodiment of this embodiment, the first antenna 12 includes a first horizontal section 121, a second horizontal section 122, a first vertical section 123, a second vertical section 124, a first oblique section 125, and a second oblique section 126. The first horizontal section 121 is located at the top of the circuit board 1 and on one side of the side of the circuit board 1; the second horizontal section 122 is located at the top of the circuit board 1 and on the other side of the side of the circuit board 1; the first vertical section 123 is located above the circuit board 1 and on one side of the first horizontal section 121; the second vertical section 124 is located above the circuit board 1 and on one side of the second horizontal section 122; the first oblique section 125 is located above the circuit board 1 and on one side of the first horizontal section 121; and the second oblique section 126 is located above the circuit board 1 and on one side of the second horizontal section 122. Furthermore, a vertical first protrusion 127 is provided at the end of the first horizontal section 121, and a vertical second protrusion 128 is provided at the end of the second horizontal section 122.

[0052] Specifically, the first horizontal section 121, the first vertical section 123 and the first inclined section 125 are connected by a round corner, the second horizontal section 122, the second vertical section 124 and the second inclined section 126 are connected by a round corner, and the first inclined section 125 and the second inclined section 126 are connected by a round corner. That is, the first antenna 12 forms a general arch-shaped structure.

[0053] In this embodiment, the second antenna 13 is the same in size and shape as the first antenna 12.

[0054] Therefore, the second antenna 13 includes a third horizontal section, a fourth horizontal section, a third vertical section, a fourth vertical section, a third inclined section and a fourth inclined section. The third horizontal section is located on the top of the circuit board 1 and on one side of the side direction of the circuit board 1; the fourth horizontal section is located on the top of the circuit board 1 and on the other side of the side direction of the circuit board 1; the third vertical section is located above the circuit board 1 and on one side of the third horizontal section; the fourth vertical section is located above the circuit board 1 and on one side of the fourth horizontal section; the third inclined section is located above the circuit board 1 and on one side of the third horizontal section; the fourth inclined section is located above the circuit board 1 and on one side of the fourth horizontal section; the end of the third horizontal section is provided with a vertical third protruding structure, and the end of the fourth horizontal section is provided with a vertical fourth protruding structure.

[0055] Specifically, the third horizontal section, the third vertical section and the third inclined section are connected by a round corner, the fourth horizontal section, the fourth vertical section and the fourth inclined section are connected by a round corner, and the third inclined section and the fourth inclined section are connected by a round corner. That is, the second antenna 13 forms a general arch-shaped structure.

[0056] In this embodiment, the first antenna 12 and the second antenna 13 form a general arch-shaped structure, which can make the length of the first antenna 12 and the second antenna 13 as long as possible, increase the inductance, and improve the radiation efficiency of the antenna. The first antenna 12 and the second antenna 13 can also be erected above the circuit board 1 without interfering with the arrangement of other electronic elements on the circuit board 1, thereby saving space.

[0057] In this embodiment, the first antenna 12 and the second antenna 13 form a rib structure with a rectangular cross section. The rib structure has high forming size precision, stable self-resonant frequency, less conductor resistance loss, and ensures stable and reliable performance of the tire pressure sensor and good batch consistency.

[0058] As Figures 1 to 3As shown, specifically, in this embodiment, a first through hole, a second through hole, a third through hole and a fourth through hole are provided on the circuit board 1; on the back side of the circuit board 1, a first antenna pad 3, a second antenna pad 4, a third antenna pad 6 and a fourth antenna pad 7 are provided at the first through hole, the second through hole, the third through hole and the fourth through hole.

[0059] The first antenna 12 passes through the first through-hole and the second through-hole via the first protrusion 127 and the second protrusion 128, respectively, and is electrically connected to the first antenna pad 3 and the second antenna pad 4, respectively. The second antenna 13 passes through the third through-hole and the fourth through-hole via the third protrusion and the fourth protrusion, respectively, and is electrically connected to the third antenna pad 6 and the fourth antenna pad 7, respectively. In other words, the first antenna 12 is soldered to the first antenna pad 3 and the second antenna pad 4, and the second antenna 13 is soldered to the third and fourth pads.

[0060] The circuit board 1 is also provided with a signal feed point 2, a matching capacitor 9, and a ground via 11. The signal feed point 2 is connected to the output of the power amplifier and serves as the input point for RF signal transmission. The signal feed point 2 is electrically connected to the first antenna pad 3; the second antenna pad 4 and the third antenna pad 6 are connected via a first feed line 5; the fourth antenna pad 7 is connected to the matching capacitor 9 via a second feed line 8; and the matching capacitor 9 is connected to the ground via 11 via a third feed line 10. This forms a complete antenna assembly for the tire pressure sensor.

[0061] In this embodiment, the center frequency of the first antenna 12 and the second antenna 13 is designed to be 433 MHz, and the length of the first antenna 12 and the second antenna 13 is designed to be 1 / 16 of the wavelength of the center frequency. The first antenna 12 and the second antenna 13 are of the same size. Therefore, the total length of the antenna assembly provided in this embodiment is twice the length of a conventional single antenna, that is, 1 / 8 of the wavelength of the center frequency.

[0062] An embodiment of the present invention also provides a tire pressure sensor, including a sensor body, a valve stem, and the antenna assembly for the tire pressure sensor as described above. The sensor body is connected to the valve stem, and the antenna assembly for the tire pressure sensor is arranged in the sensor body.

[0063] It is understandable that other structures and working principles of the tire pressure sensor in this embodiment are known technologies in the art and are well known to those skilled in the art, and will not be described in detail herein.

[0064] The tire pressure sensor provided by the embodiment of the present invention has the above-mentioned antenna assembly. The antenna group is located on one side of the circuit board 1. Its structure is simple and compact, occupies a small space, and is wound into turns, which can meet the transmission performance requirements.

[0065] The tire pressure sensor antenna assembly provided in this embodiment utilizes a dual-antenna design. When the two antennas are electrically connected, the combined length is twice that of a single antenna, resulting in improved directivity and higher radiation efficiency. Furthermore, the antenna is located on one side of the circuit board 1, resulting in a simple and compact structure that occupies little space. The antenna is wound in turns, meeting transmission performance requirements and extending the sensor's communication range, meeting the communication distance requirements of commercial vehicles.

[0066] Although preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concepts. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention. Finally, it should be noted that, in this article, relational terms such as first and second, etc. are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or terminal device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or terminal device. In the absence of further restrictions, an element defined by the sentence "comprises a..." does not exclude the presence of other identical elements in the process, method, article or terminal device comprising the element.

[0067] The above is a detailed introduction to an antenna assembly and tire pressure sensor for a tire pressure sensor provided in the embodiments of the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the technical solutions and core ideas of the present application; ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An antenna assembly for a tire pressure sensor, characterized in that: include: Circuit board and antenna assembly; The antenna group is arranged on one side of the circuit board and is electrically connected to the circuit board. The antenna group includes at least one turn of a first antenna and one turn of a second antenna.

2. The antenna assembly for a tire pressure sensor according to claim 1, characterized in that: The first antenna and the second antenna are arranged in parallel and side by side.

3. The antenna assembly for a tire pressure sensor according to claim 2, characterized in that: The planes where the first antenna and the second antenna are located are both perpendicular to the circuit board.

4. The antenna assembly for a tire pressure sensor according to claim 1, wherein: The first antenna includes: a first horizontal section, the first horizontal section being located on the top of the circuit board and on one side in a lateral direction of the circuit board; a second horizontal section, the second horizontal section being located on the top of the circuit board and on the other side of the side direction of the circuit board; a first vertical section, the first vertical section being located above the circuit board and on one side of the first horizontal section; a second vertical segment, the second vertical segment being located above the circuit board and on one side of the second horizontal segment; a first oblique section, the first oblique section being located above the circuit board and on one side of the first horizontal section; a second oblique section, the second oblique section being located above the circuit board and on one side of the second horizontal section; A vertical first protrusion structure is provided at the end of the first horizontal section, and a vertical second protrusion structure is provided at the end of the second horizontal section; The first horizontal segment, the first vertical segment and the first oblique segment are connected by rounded corners, the second horizontal segment, the second vertical segment and the second oblique segment are connected by rounded corners, and the first oblique segment and the second oblique segment are connected by rounded corners.

5. The antenna assembly for a tire pressure sensor according to claim 4, characterized in that: The second antenna includes: a third horizontal segment, the third horizontal segment being located on the top of the circuit board and on one side in a lateral direction of the circuit board; a fourth horizontal segment, the fourth horizontal segment being located on the top of the circuit board and on the other side of the side direction of the circuit board; a third vertical segment, the third vertical segment being located above the circuit board and on one side of the third horizontal segment; a fourth vertical segment, the fourth vertical segment being located above the circuit board and on one side of the fourth horizontal segment; a third oblique section, the third oblique section being located above the circuit board and on one side of the third horizontal section; a fourth oblique section, the fourth oblique section being located above the circuit board and on one side of the fourth horizontal section; A vertical third protrusion structure is provided at the end of the third horizontal segment, and a vertical fourth protrusion structure is provided at the end of the fourth horizontal segment; The third horizontal segment, the third vertical segment and the third oblique segment are connected by rounded corners, the fourth horizontal segment, the fourth vertical segment and the fourth oblique segment are connected by rounded corners, and the third oblique segment and the fourth oblique segment are connected by rounded corners.

6. The antenna assembly for a tire pressure sensor according to claim 5, characterized in that: The first antenna and the second antenna form a rib structure with a rectangular cross section.

7. The antenna assembly for a tire pressure sensor according to claim 6, characterized in that: A first through hole, a second through hole, a third through hole and a fourth through hole are provided on the circuit board; a first antenna pad, a second antenna pad, a third antenna pad and a fourth antenna pad are provided on the back side of the circuit board at the first through hole, the second through hole, the third through hole and the fourth through hole.

8. The antenna assembly for a tire pressure sensor according to claim 7, characterized in that: The first antenna passes through the first through hole and the second through hole through the first protrusion structure and the second protrusion structure, respectively, and is electrically connected to the first antenna pad and the second antenna pad respectively; The second antenna passes through the third through hole and the fourth through hole through the third protrusion structure and the fourth protrusion structure, respectively, and is electrically connected to the third antenna pad and the fourth antenna pad, respectively.

9. The antenna assembly for a tire pressure sensor according to claim 8, characterized in that: The circuit board is provided with a signal feeding point, a matching capacitor and a ground via; The signal feed point is electrically connected to the first antenna pad; the second antenna pad and the third antenna pad are connected through a first feed line; the fourth antenna pad is connected to the matching capacitor through a second feed line; and the matching capacitor is connected to the ground via through a third feed line.

10. A tire pressure sensor, characterized in that: The tire pressure sensor comprises the antenna assembly for a tire pressure sensor according to any one of claims 1 to 9.

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