CN215642768U - a bluetooth tag - Google Patents
a bluetooth tag Download PDFInfo
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- CN215642768U CN215642768U CN202121657951.8U CN202121657951U CN215642768U CN 215642768 U CN215642768 U CN 215642768U CN 202121657951 U CN202121657951 U CN 202121657951U CN 215642768 U CN215642768 U CN 215642768U
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Abstract
The utility model discloses a Bluetooth tag which comprises a Bluetooth module, a Bluetooth antenna and a battery, wherein the Bluetooth antenna is connected to the Bluetooth module, the Bluetooth antenna is a patch antenna, the Bluetooth module and the Bluetooth antenna are arranged on a PCB (printed circuit board), the PCB is a multilayer circuit board, the Bluetooth antenna is arranged on the top layer of the PCB, the Bluetooth module is arranged on the bottom layer of the PCB, and the battery supplies power to the Bluetooth module. The Bluetooth antenna adopts a patch antenna, and is suitable for the surface of an object made of any material; the patch antenna is adopted for polarization processing, signal energy is transmitted in a centralized manner in a required direction, the application distance of the Bluetooth tag is increased, and a signal receiver can receive signals in a horizontal polarization direction or a vertical polarization direction; the Bluetooth antenna is arranged on the top layer of the PCB, and the circuit is arranged on the bottom layer of the PCB, so that the size is reduced; the patch antenna and the PCB are integrally printed, so that the cost is reduced.
Description
Technical Field
The utility model relates to the technical field of Bluetooth, in particular to a Bluetooth tag.
Background
With the wide application of positioning and navigation technologies, outdoor navigation is far from meeting the requirements of consumers, and people hope to realize location-based services in indoor scenes such as superstores, supermarkets and the like. Along with the ecological chain of thing networking gradually moves towards maturity, also greatly increased to the demand of location, the bluetooth location obtains the wide application, and the bluetooth location comprises bluetooth basic station and bluetooth label.
Most of the antennas used in the bluetooth tags are microstrip PIFA antennas directly printed on a PCB or ceramic antennas directly purchased from antenna manufacturers.
When the bluetooth label sets up when various different material object surfaces, no matter be PCB printing microstrip PIFA antenna or ceramic antenna, the operating frequency of antenna can take place the skew of different degrees according to the difference of the material, leads to the antenna can't work on the original design frequency point, reduces bluetooth label's application distance and practicality. The antennas all belong to omnidirectional antennas in the radiation direction, and energy cannot be emitted to the required direction in a concentrated mode, so that the working distance is greatly shortened. In addition, since the ceramic antenna is a general antenna, an application risk that the working bandwidth and the working frequency cannot be matched with the set working frequency of the bluetooth tag may occur; meanwhile, the ceramic antenna is high in price, so that the cost of the Bluetooth tag can be increased, and the market competitiveness is reduced. Accordingly, the prior art is yet to be improved and developed.
SUMMERY OF THE UTILITY MODEL
The technical problem to be solved by the utility model is to provide a bluetooth tag, which solves the problem that when the bluetooth antenna of the existing bluetooth tag is applied to different objects, the working frequency can deviate to different degrees according to different materials.
The technical scheme adopted by the utility model for solving the technical problems is to provide a Bluetooth tag, which comprises a Bluetooth module, a Bluetooth antenna and a battery, wherein the Bluetooth antenna is connected to the Bluetooth module, the Bluetooth antenna is a patch antenna, the Bluetooth module and the Bluetooth antenna are arranged on a PCB (printed circuit board), the PCB is a multilayer circuit board, the Bluetooth antenna is arranged on the top layer of the PCB, and the Bluetooth module is arranged on the bottom layer of the PCB; the battery supplies power to the Bluetooth module.
Further, the bluetooth antenna is connected to the bluetooth module through a microstrip transmission line.
Further, the PCB board is including the top layer, substrate layer and the bottom that set gradually, still be provided with at least a set of intermediate level and the middle substrate layer that connects gradually between substrate layer and the bottom, connect through the interface channel electricity between the top layer of PCB board, intermediate level and the bottom.
Furthermore, the Bluetooth antenna is a circularly polarized antenna, the circularly polarized frequency point of the Bluetooth antenna is consistent with the Bluetooth frequency point, and the working frequency band of the Bluetooth antenna is 2.4GHz-2.5 GHz.
Further, the bluetooth antenna is formed with PCB board body printing.
Furthermore, the battery is connected to the Bluetooth module through the power management chip for power supply, and a key switch is connected between the battery and the power management chip.
Furthermore, the power management chip is connected with a sensor, and the sensor is a temperature sensor, a gravity sensor, a humidity sensor, an optical sensor, an infrared temperature measurement sensor, an MEMS gyroscope or an accelerometer.
Furthermore, the Bluetooth module is connected with a reference clock and a status indicator lamp.
Compared with the prior art, the utility model has the following beneficial effects: according to the Bluetooth tag, the Bluetooth antenna is a patch antenna, and is suitable for the surface of an object made of any material; the patch antenna is adopted for polarization processing, signal energy is transmitted in a centralized manner in a required direction, the application distance of the Bluetooth tag is increased, and a signal receiver can receive signals in a horizontal polarization direction or a vertical polarization direction; the Bluetooth antenna is arranged on the top layer of the PCB, and the circuit is arranged on the bottom layer of the PCB, so that the size is reduced; the patch antenna and the PCB are integrally printed, so that the cost is reduced.
Drawings
Fig. 1 is a block diagram of a bluetooth tag according to an embodiment of the present invention;
FIG. 2 is a top view of a PCB board carrying an antenna according to an embodiment of the present invention;
FIG. 3 is a side view of a PCB board carrying an antenna according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a stacked structure of a PCB board according to an embodiment of the utility model.
In the figure:
1. a Bluetooth module; 2. a Bluetooth antenna; 3. a battery; 4. a power management chip; 5. a key switch; 6. a sensor; 7. a reference clock; 8. a status indicator light; 9. a microstrip transmission line; 10. a top layer; 11. a substrate layer; 12. a bottom layer; 13. a first intermediate layer; 14. a first intermediate substrate layer; 15. a second intermediate layer; 16. a second intermediate substrate layer; 17. a connecting channel.
Detailed Description
The utility model is further described below with reference to the figures and examples.
Fig. 1 is a block diagram of a bluetooth tag according to an embodiment of the present invention.
Referring to fig. 1, the bluetooth tag according to the embodiment of the present invention includes a bluetooth module 1, a bluetooth antenna 2 and a battery 3, wherein the bluetooth antenna 2 is connected to the bluetooth module 1, and the battery 3 supplies power to the bluetooth module 1 to provide a working power supply; the battery 3 is connected to the Bluetooth module 1 via the power management chip 4 for power supply, the key switch 5 is connected between the battery 3 and the power management chip 4, the key switch 5 controls the on-off of the Bluetooth label, and the power management chip 4 performs on-off management of the Bluetooth label power supply.
Specifically, the power management chip 4 is connected to a sensor 6, and the sensor 6 may be a temperature sensor, a gravity sensor, a humidity sensor, an optical sensor, an infrared temperature measurement sensor, a MEMS gyroscope, an accelerometer, or the like. According to different application scenes, different sensors are configured, and the power management chip 4 controls the working state of the Bluetooth module 1 by reading data of the sensors 6.
Specifically, the bluetooth module 1 is connected with a reference clock 7 and a status indicator light 8, and the reference clock 7 provides a clock reference for the bluetooth module 1; the status indicator lamp 8 indicates the operating status of the bluetooth module 1.
Referring to fig. 2 and fig. 3, in the bluetooth tag according to the embodiment of the present invention, the bluetooth antenna 2 is a patch antenna, the bluetooth module 1 and the bluetooth antenna 2 are disposed on a PCB, the PCB is a multilayer circuit board, the PCB includes a top layer 10, a substrate layer 11, and a bottom layer 12, which are sequentially disposed, the bluetooth antenna 2 is disposed on the top layer 10 of the PCB, and the bluetooth module 1 is disposed on the bottom layer 12 of the PCB. Such an arrangement reduces the bulk of the bluetooth tag.
Specifically, bluetooth antenna 2 is connected to bluetooth module 1 through microstrip transmission line 9, and bluetooth antenna 2 forms with the integrative printing of PCB board. The cost of bluetooth label is reduced.
Referring to fig. 4, in the bluetooth tag according to the embodiment of the present invention, two sets of intermediate substrate layers and intermediate substrate layers are sequentially connected between the substrate layer 11 and the bottom layer 12 of the PCB, and the top layer 10, the intermediate substrate layers and the bottom layer 12 of the PCB are electrically connected through the connecting channel 17. The top layer 10 and the first intermediate layer 13 can be used as a circularly polarized patch antenna; the second intermediate layer 15 and the bottom layer 12 are used for circuit part design. Setting the first middle layer 13 as a metal layer, and making a circularly polarized patch antenna on the top layer 10; the thicknesses of the base material layer 11, the first middle base material layer 14 and the second middle base material layer 16 are adjusted to meet the requirements of the required radiation gain and the radiation direction of the patch antenna, and a proper plate is selected to serve as the base material to achieve the required radiation efficiency of the patch antenna.
Preferably, the bluetooth antenna 2 is a circularly polarized antenna, the circularly polarized frequency point of the bluetooth antenna 2 is consistent with the bluetooth frequency point, and the working frequency band of the bluetooth antenna 2 is 2.4GHz-2.5 GHz. The signal energy is concentrated to the required direction and is transmitted out through the polarization processing, the application distance of the Bluetooth tag is increased, and the signal receiver can receive signals in the horizontal polarization direction or the vertical polarization direction.
In summary, in the bluetooth tag according to the embodiment of the present invention, the bluetooth antenna 2 is a patch antenna, and is suitable for surfaces of objects made of any material; the patch antenna carries out polarization processing, and the signal energy is transmitted in a centralized manner in a required direction, so that the application distance of the whole system is increased, and a signal receiver can receive signals in a horizontal polarization direction or a vertical polarization direction; the Bluetooth antenna 2 is arranged on the top layer 10 of the PCB, and the circuit is arranged on the bottom layer 12 of the PCB, so that the volume is reduced; the patch antenna and the PCB are integrally printed, so that the cost is reduced.
Although the present invention has been described with respect to the preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the utility model as defined by the appended claims.
Claims (8)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121657951.8U CN215642768U (en) | 2021-07-20 | 2021-07-20 | a bluetooth tag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121657951.8U CN215642768U (en) | 2021-07-20 | 2021-07-20 | a bluetooth tag |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215642768U true CN215642768U (en) | 2022-01-25 |
Family
ID=79891233
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121657951.8U Active CN215642768U (en) | 2021-07-20 | 2021-07-20 | a bluetooth tag |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215642768U (en) |
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2021
- 2021-07-20 CN CN202121657951.8U patent/CN215642768U/en active Active
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