Surface acoustic wave sensing array transceiving antenna
By designing a surface acoustic wave sensing array transceiver antenna, a separate sensor end array antenna and a lateral acquisition end antenna are adopted, combined with a ring substrate and a rotating lateral acquisition end antenna, the signal coverage problem in the torque measurement of the rotating structure is solved, simplifying the wiring process and reducing metal environment interference.
Patent Information
- Application Number
- CN202420802184.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-17
- Publication Date
- 2025-03-28
- Estimated Expiration
- 2034-04-17
AI Technical Summary
When the surface acoustic wave torque sensor wirelessly measures the torque of the dynamic rotating structure, it is difficult to achieve all-round signal coverage of the entire circumference, and the complex wiring of the sensor antenna affects performance, and the metal environment is very disturbed.
A surface acoustic wave sensing array transceiver antenna is designed, and the sensor end array antenna is separated from the lateral acquisition end antenna. The sensor end array antenna is installed through a ring substrate, and all-round signal coverage is achieved by rotating the lateral acquisition end antenna.
It realizes all-round signal coverage of the rotating structure, simplifies the wiring process, reduces metal environment interference, and expands the application scenarios of surface acoustic wave sensors.
Smart Images
Figure CN222690914U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of surface acoustic wave devices, and in particular to a surface acoustic wave sensor array transceiver antenna. Background Art
[0002] The surface acoustic wave sensor is a type of MEMS sensor based on a voltage substrate. The surface acoustic wave strain / torque sensor can be used for strain, force, and other sensing in dynamic environments because of its wireless and passive characteristics. However, when the surface acoustic wave torque sensor is used to wirelessly measure the torque of a dynamic rotating structure, it often faces the problem that the wireless signal is difficult to cover the entire circumference in all directions. Therefore, it is usually necessary to install two axially coupled circular ring antennas on the rotating structure to meet the full coverage of the entire circumference; and this method requires that the antenna at the collection end must also be mounted on the rotating shaft, thereby limiting the application scenarios of the surface acoustic wave torque sensor. Moreover, the sensor antenna usually has only one port, and multiple surface acoustic wave sensor array elements require complex wiring, which has a great impact on the antenna performance. In addition, the measuring structure and its surrounding installation environment are usually metal, which will cause great interference to the antenna. Utility Model Content
[0003] The application discloses a surface acoustic wave sensor array transceiver antenna.
[0004] The surface acoustic wave sensor array transceiver antenna comprises: a sensor end array antenna and a lateral collection end antenna; wherein,
[0005] The sensor end array antenna comprises: an antenna array element for receiving electromagnetic waves from the lateral collection end antenna or sending electromagnetic waves to the lateral collection end antenna, a first feeding port for realizing the interaction between the antenna array element and the surface acoustic wave sensor, and a ring antenna substrate, wherein the antenna array element is arranged on the ring antenna substrate;
[0006] The lateral collection end antenna includes: a radiating surface for sending or receiving electromagnetic waves to or from the sensor end array antenna, an antenna substrate, and a second feeding port for realizing interaction between the radiating surface and the processing end; the radiating surface and the second feeding port are arranged on the antenna substrate.
[0007] In a possible implementation, the antenna array element includes a first coupling metal surface, a second coupling metal surface, and a via connection line; the via connection line is used to electrically connect the first coupling metal surface and the second coupling metal surface.
[0008] In a possible implementation manner, the loop antenna substrate is further provided with a groove;
[0009] The first coupling metal surface is coupled to the inner wall surface of the groove, and the second coupling metal surface is coupled to the outer wall surface of the groove.
[0010] In a possible implementation, the antenna substrate is in an arc shape, and the radiation surface is coupled to an inner arc surface of the antenna substrate.
[0011] In a possible implementation manner, the loop antenna substrate further includes a first through hole for placing the via connection line and / or the first feeding port.
[0012] In a possible implementation manner, the number of the antenna array elements is greater than the number of the surface acoustic wave sensor arrays; and the number of the first feeding ports is less than or equal to the number of the antenna array elements.
[0013] In a possible implementation, the annular antenna substrate further includes a mounting platform for mounting a device under test, and the mounting platform is disposed at the bottom of the annular substrate.
[0014] In a possible implementation manner, a second through hole is provided on the antenna substrate; the second through hole is used to place a channel of the second feeding port.
[0015] In a possible implementation manner, the transceiver antenna further includes a mounting handle for connecting a fixing member and the lateral collection end antenna.
[0016] In a possible implementation manner, a third through hole is provided on the antenna substrate, and a fourth through hole is provided on the mounting handle; the third through hole and the fourth through hole are connected by bolts.
[0017] The surface acoustic wave sensor array transceiver antenna provided in the present application adopts a method of separating the sensor end array antenna and the lateral collection end antenna, and the sensor end array antenna is installed on the object under test through a ring substrate. The lateral collection end antenna is rotated, which solves the problem of full coverage of all-round signals of the entire circle in rotation measurement while meeting the lateral reception signal, and realizes the measurement of strain, force and other sensing of the rotating structure object under test. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.
[0019] Figure 1 A schematic diagram of the structure of a surface acoustic wave sensor array transceiver antenna provided in an embodiment of the present application;
[0020] Figure 2 A schematic diagram of an antenna array element structure exemplarily provided in an embodiment of the present application;
[0021] Figure 3 This is a schematic diagram of a loop antenna substrate structure exemplarily provided in an embodiment of the present application;
[0022] Figure 4 This is a schematic diagram of a lateral collection end antenna structure provided as an example in an embodiment of the present application. DETAILED DESCRIPTION
[0023] The solution provided in this specification is described below in conjunction with the accompanying drawings.
[0024] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be described below in conjunction with the accompanying drawings. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.
[0025] In the description of the embodiments of the present application, words such as "exemplary", "for example" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary", "for example" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary", "for example" or "for example" is intended to present related concepts in a concrete way.
[0026] In the description of the embodiments of the present application, the term "and / or" is merely a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, B exists alone, and A and B exist at the same time. In addition, unless otherwise specified, the term "plurality" means two or more.
[0027] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. The terms "include", "comprises", "has" and their variations all mean "including but not limited to", unless otherwise specifically emphasized.
[0028] The surface acoustic wave sensor is a type of MEMS sensor based on a voltage substrate. The surface acoustic wave strain / torque sensor can be used for strain, force, and other sensing in dynamic environments because of its wireless and passive characteristics. However, when the surface acoustic wave torque sensor is used to wirelessly measure the torque of a dynamic rotating structure, it often faces the problem that the wireless signal is difficult to cover the entire circumference in all directions. Therefore, it is usually necessary to install two axially coupled circular ring antennas on the rotating structure to meet the full coverage of the entire circumference; and this method requires that the antenna at the collection end must also be mounted on the rotating shaft, thereby limiting the application scenarios of the surface acoustic wave torque sensor. Moreover, the sensor antenna usually has only one port, and multiple surface acoustic wave sensor array elements require complex wiring, which has a great impact on the antenna performance. In addition, the measuring structure and its surrounding installation environment are usually metal, which will cause great interference to the antenna.
[0029] In view of the above content, the present application proposes a surface acoustic wave sensor array transceiver antenna. The transceiver antenna comprises: a sensor end array antenna 1 and a lateral collection end antenna 2.
[0030] The sensor end array antenna 1 is used to connect the surface acoustic wave sensor array, receive the excitation electromagnetic wave signal emitted from the lateral collection end antenna 2, and transmit the electromagnetic wave signal to the surface acoustic wave sensor; the surface acoustic wave sensor converts the electromagnetic wave signal into a surface acoustic wave, and measures it through the surface acoustic wave sensor. The surface acoustic wave sensor converts the surface acoustic wave with the sensing quantity information into an electromagnetic wave signal, and transmits it to the lateral collection end antenna 2 through the sensor end array antenna 1. The electromagnetic wave received by the collection end antenna 2 carries the sensed sensing quantity information, which can be used for signal processing and regulation by the processing module of the processing end. Among them, the surface acoustic wave sensor can be a silent passive sensor.
[0031] like Figure 1 As shown, the sensor end array antenna 1 specifically includes: an antenna array element 1-2 for receiving electromagnetic waves from the lateral collection end antenna 2 or sending electromagnetic waves to the lateral collection end antenna 2, a first feeding port 1-1 for realizing the interaction between the antenna array element 1-2 and the surface acoustic wave sensor, and a ring antenna substrate 1-3; the first feeding port 1-1 is set on the antenna array element 1-2, connecting the surface acoustic wave sensor chip and the antenna array element 1-2.
[0032] The loop antenna substrate 1-3 can be mounted on the DUT, or fixed to the DUT by other methods such as welding or bonding. It should be noted that in order to adapt to DUTs of different shapes, the inner ring of the loop antenna substrate 1-3 can be changed according to the structure and shape of the DUT. At the same time, in order to ensure the frequency response, radiation characteristics and durability of the antenna, the material of the loop antenna substrate 1-3 needs to be selected based on factors such as dielectric constant, mechanical strength, size and cost.
[0033] By distributing and arranging the antenna elements 1-2 on the antenna substrate, the problem of full coverage of the entire circumference signal in rotation measurement can be solved while satisfying the lateral reception signal. Specifically, the antenna elements 1-2 can be arranged circumferentially and laterally on the antenna substrate, which can better solve the problem of full coverage of the entire circumference signal in rotation measurement.
[0034] The lateral acquisition end antenna 2 specifically includes: a radiation surface 2-1 for sending or receiving electromagnetic waves to or from the sensor end array antenna 1, an antenna substrate 2-3, and a second feeding port 2-4 for realizing the interaction between the radiation surface 2-1 and the processing end; the radiation surface 2-1 is arranged on the antenna substrate 2-3 to realize lateral coupling with the sensor end array antenna 1; wherein, the antenna substrate 2-3 can be arc-shaped, and the radiation surface 2-1 can be coupled to the inner arc surface of the antenna substrate 2-3; more specifically, the diameter of the antenna substrate 2-3 can be greater than the diameter of the ring antenna substrate 1-3. The second feeding port 2-4 is installed on the antenna substrate 2-3, connecting the radiation surface 2-1 and the processing end.
[0035] In the lateral collection end antenna 2, the radiating surface 2-1 converts the electrical signal into electromagnetic waves and radiates them through its specific structure and shape, or converts the received electromagnetic waves into electrical signals and transmits them to the second feeding port 2-4. The radiating surface 2-1 is directly electrically connected to the second feeding port 2-4. For example, the second feeding port 2-4 directly uses the inner core of the coaxial cable, or can also be connected with a metal column, or other alternative electrical connection methods. For example, refer to Figure 1 As shown, the diameter of the antenna substrate 2-3 is larger than the outer diameter of the loop antenna substrate 1-3, and is coaxially assembled with the loop antenna substrate 1-3 at the same height, thereby realizing wireless measurement of the dynamic rotating structure by the acoustic surface sensor.
[0036] See also Figure 2 As shown, in a possible implementation, the antenna array element 1-2 may specifically include an internal coupling metal plane 1-2-1, a second coupling metal plane 1-2-2, and a via connection line 1-2-3, and the via connection line 1-2-3 is responsible for electrically connecting the first coupling metal plane 1-2-1 and the second coupling metal plane 1-2-2.
[0037] The first coupling metal surface 1-2-1 and the second coupling metal surface 1-2-2 are responsible for converting electromagnetic waves into electrical signals in space, or converting received electromagnetic fields into electrical signals. When the antenna array element 1-2 is working, the first coupling metal surface 1-2-1 and the second coupling metal surface 1-2-2 convert electrical signals into electromagnetic waves and radiate them through their specific structures and shapes, or convert received electromagnetic waves into electrical signals and transmit them to external circuits. At the same time, the first coupling metal surface 1-2-1 and the second coupling metal surface 1-2-2 can adjust the frequency response or impedance matching of the antenna array element 1-2 according to actual conditions, and provide compensation and support for the antenna array element 1-2, thereby improving the performance of the antenna array element 1-2, such as enhancing radiation directivity, reducing side lobes, etc.
[0038] It should be noted that the shapes of the first coupling metal surface 1-2-1 and the second coupling metal surface 1-2-2 can be modified according to actual needs, such as modifying the shape according to the frequency and bandwidth requirements of the sensor end array antenna 1, or trimming, hollowing out, and notching.
[0039] For example, if Figure 2 The sensor end array antenna 1 shown includes 6 antenna elements 1-2, each antenna element 1-2 has its own first coupling metal surface 1-2-1 and second coupling metal surface 1-2-2, and the two-dimensional plane of the arc surface of the first coupling metal surface 1-2-1 and the second coupling metal surface 1-2-2 is unfolded into a rectangle. To achieve better signal reception, the 6 antenna elements 1-2 are evenly distributed in a 360° circle and connected to each other. In addition, in a possible implementation, the first coupling metal surface 1-2-1 and the second coupling metal surface 1-2-2 of multiple antenna elements 1-2 can be connected using the same via connection line 1-2-3.
[0040] It should be noted that the first feeding port 1-1 is set on the antenna array element 1-2, and the first feeding port 1-1 can be connected to the corresponding single antenna array element 1-2. At the same time, a single first feeding port 1-1 can also be connected to multiple antenna array elements 1-2. Figure 2 In the sensor-end array antenna 1 shown, there are a total of 6 antenna elements 1 - 2 and 2 first feeding ports 1 - 1 , and the two first feeding ports 1 - 1 are connected to two surface acoustic wave sensor chips.
[0041] In a possible implementation, a groove 1-3-3 is provided on the ring antenna substrate 1-3, and the antenna array element 1-2 is coupled to the groove 1-3-3; the first coupling metal surface 1-2-1 is coupled to the inner wall surface of the groove 1-3-3, and the second coupling metal surface 1-2-2 is coupled to the outer wall surface of the groove 1-3-3.
[0042] like Figure 3As shown, inside the loop antenna substrate 1-3, each antenna element 1-2 has its corresponding groove, the first coupling metal surface 1-2-1 is coupled to the inner wall surface of the groove 1-3-3, and the second coupling metal surface 1-2-2 is coupled to the outer wall surface of the groove 1-3-3. Figure 2 In the figure, there are 6 antenna elements 1-2; correspondingly, Figure 3 There are a total of 6 grooves 1-3-3 on the loop antenna substrate 1-3, and each groove 1-3-3 corresponds to the antenna array element 1-2.
[0043] It should be noted that the groove 1-3-3 can also be set outside the ring antenna substrate 1-3. In this case, the second coupling metal surface 1-2-2 is coupled to the inner wall surface of the groove 1-3-3, and the first coupling metal surface 1-2-1 is coupled to the outer wall surface of the groove 1-3-3. In addition, the groove 1-3-3 can adjust the distance between the antenna array element 1-2 and the device under test; therefore, the groove depth of the groove 1-3-3 can be adjusted according to actual needs.
[0044] In order to better assemble the sensor end array antenna 1, a first through hole 1-3-1 may be provided on the loop antenna substrate 1-3 for placing the via hole connection line 1-2-3 and / or the first feeding port 1-1. Figure 3 As shown, the loop antenna substrate 1-3 has a through hole 1-3-1 at the position of the via connection line 1-2-3 and the feeding port 1-1, which serves as a connection channel between the inside and outside of the loop antenna substrate 1-3 and is used to place the via connection line 1-2-3 and the first feeding port 1-1.
[0045] In order to solve the problem of complex wiring and multiple wires affecting antenna performance, the number of antenna elements 1-2 can be set to be greater than the number of surface acoustic wave sensor arrays; the number of first feeding ports 1-1 is less than or equal to the number of antenna elements 1-2; then all surface acoustic wave sensors in the sensor end array antenna 1 can be connected to the same antenna element 1-2 at the shortest distance, solving the problem of complex wiring and multiple wires affecting antenna performance.
[0046] For the purpose of facilitating the installation of the transceiver antenna, in one possible implementation, the loop antenna substrate 1-3 also includes a mounting platform 1-3-2 for mounting the device under test, and the mounting platform 1-3-2 is disposed at the bottom of the loop antenna substrate 1-3.
[0047] For example, if Figure 3The loop antenna substrate 1-3 is in a circular ring shape, and a mounting platform 1-3-2 is reserved at the bottom for being mounted on the DUT. In actual measurement, different mounting platforms 1-3-2 can be designed and installed on the loop antenna substrate 1-3 according to the DUT of different shapes and sizes. The mounting platform 1-3-2 can be disassembled according to the needs during measurement to realize the unified production and assembly of the sensor end array antenna 1.
[0048] In addition, the mounting platform 1-3-2 and the groove 1-3-3 of the loop antenna substrate 1-3 can jointly ensure the distance between the antenna element 1-2 and the device under test, thereby preventing the metal environment of the device under test and its accessories from affecting the transceiver antenna.
[0049] In a possible implementation manner, a second through hole 2-3-1 is provided on the antenna substrate 2-3; the second through hole 2-3-1 is used to place a channel of the second feeding port 2-4.
[0050] refer to Figure 4 A position of a feeding port 2-4 is reserved at one end of the radiation surface 2-1 and the ground plane 2-2, and a hole is opened in the ground plane 2-2 at the position where the feeding port 2-4 passes through, so that the feeding port 2-4 and the ground plane 2-2 are insulated and isolated.
[0051] In a possible implementation manner, the curvature of the arc-shaped antenna substrate 2 - 3 is not greater than a maximum curvature at which the antenna substrate 2 - 3 can not interfere with the device under test when installed laterally.
[0052] The arc of the lateral collection end antenna 2 is α, and the value of α is based on not interfering with the measured structure when installed sideways, and is designed to be as large as possible without affecting the installation, so as to cover the antenna array elements 1-2 of the sensor end array antenna 1 as much as possible. For example, Figure 1 In the transceiver antenna shown, the arc of the lateral collection end antenna 2 is 150°.
[0053] In the measurement of torque, the measured object and its surroundings are usually made of metal, which will cause great interference to the antenna; therefore, in a possible implementation, the transceiver antenna also includes a mounting handle 3 for connecting the fixing part and the lateral collection end antenna 2.
[0054] The mounting handle 3 is used to mount the lateral collection end antenna 2. In order to reduce the impact of the metal environment, the mounting handle 3 can be made of insulating material; at the same time, the mounting handle 3 can also be used to adjust the isolation distance between the lateral collection end antenna 2 and other metal structures.
[0055] In a possible embodiment, a third through hole 2-3-2 is provided on the antenna substrate 2-3, and a fourth through hole 3-1 is provided on the mounting handle 3; the third through hole 2-3-2 and the fourth through hole 3-1 are connected by bolts, thereby connecting the antenna substrate 2-3 and the mounting handle 3; in addition, the antenna substrate 2-3 and the mounting handle 3 can also be connected by other methods such as hinged connection and fork connection.
[0056] The rear end is used for connecting with the relevant fixing device in the actual installation, and the installation handle can also be provided with a through hole 3-2 as a reserved installation hole. At the same time, other methods such as bonding, hinged connection, etc. can also be used to connect the fixing device.
[0057] The above specific implementation methods further illustrate the purpose, technical solutions and beneficial effects of the present application in detail. It should be understood that the above are only specific implementation methods of the present application and are not used to limit the protection scope of the present application. Any modifications, equivalent substitutions, improvements, etc. made on the basis of the technical solutions of the present application should be included in the protection scope of the present application.
Claims
1. A surface acoustic wave sensor array transceiver antenna, characterized in that: include: A sensor end array antenna (1) and a lateral collection end antenna (2); wherein: The sensor end array antenna (1) comprises: an antenna array element (1-2) for receiving electromagnetic waves from the lateral collection end antenna (2) or sending electromagnetic waves to the lateral collection end antenna (2), a first feeding port (1-1) for realizing the interaction between the antenna array element (1-2) and the surface acoustic wave sensor, and a ring antenna substrate (1-3). The antenna array element (1-2) is arranged on the ring antenna substrate (1-3); The lateral collection end antenna (2) comprises: a radiation surface (2-1) for sending electromagnetic waves to the sensor end array antenna (1) or receiving electromagnetic waves from the sensor end array antenna (1), an antenna substrate (2-3), and a second feeding port (2-4) for realizing interaction between the radiation surface (2-1) and the processing end; the radiation surface (2-1) and the second feeding port (2-4) are arranged on the antenna substrate (2-3).
2. The transceiver antenna according to claim 1, characterized in that: The antenna array element (1-2) comprises a first coupling metal surface (1-2-1), a second coupling metal surface (1-2-2) and a via hole connection line (1-2-3); the via hole connection line (1-2-3) is used to electrically connect the first coupling metal surface (1-2-1) and the second coupling metal surface (1-2-2).
3. The transceiver antenna according to claim 2, characterized in that: The annular antenna substrate (1-3) is also provided with a groove (1-3-3); The first coupling metal surface (1-2-1) is coupled to the inner wall surface of the groove (1-3-3), and the second coupling metal surface (1-2-2) is coupled to the outer wall surface of the groove (1-3-3).
4. The transceiver antenna according to claim 1, characterized in that: The antenna substrate (2-3) is in an arc shape, and the radiation surface is coupled to the inner arc surface of the antenna substrate (2-3).
5. The transceiver antenna according to claim 2, characterized in that: The loop antenna substrate (1-3) also includes a first through hole (1-3-1) for placing the via connection line (1-2-3) and / or the first feeding port (1-1).
6. The transceiver antenna according to claim 1, characterized in that: The number of the antenna array elements (1-2) is greater than the number of the surface acoustic wave sensor array; and the number of the first feeding ports (1-1) is less than or equal to the number of the antenna array elements (1-2).
7. The transceiver antenna according to claim 1, characterized in that: The annular antenna substrate (1-3) also includes a mounting platform (1-3-2) for mounting a device under test, and the mounting platform (1-3-2) is arranged at the bottom of the annular antenna substrate (1-3).
8. The transceiver antenna according to claim 1, characterized in that: A second through hole (2-3-1) is provided on the antenna substrate (2-3); the second through hole (2-3-1) is used for accommodating a channel of the second feeding port (2-4).
9. The transceiver antenna according to claim 1, characterized in that: The transceiver antenna also includes a mounting handle (3) for connecting a fixing component and the lateral collection end antenna (2).
10. The transceiver antenna according to claim 9, characterized in that: The antenna substrate (2-3) is provided with a third through hole (2-3-2), and the mounting handle (3) is provided with a fourth through hole (3-1); the third through hole (2-3-2) and the fourth through hole (3-1) are connected by bolts.