CN214378816U - Bluetooth device and car suitable for on-vehicle multimedia equipment - Google Patents
Bluetooth device and car suitable for on-vehicle multimedia equipment Download PDFInfo
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- CN214378816U CN214378816U CN202023275595.1U CN202023275595U CN214378816U CN 214378816 U CN214378816 U CN 214378816U CN 202023275595 U CN202023275595 U CN 202023275595U CN 214378816 U CN214378816 U CN 214378816U
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Abstract
The utility model provides a pair of bluetooth device and car suitable for on-vehicle multimedia equipment, through with external bluetooth antenna and built-in bluetooth antenna integration in an on-vehicle multimedia equipment, in the use scene of difference, can be through inserting external bluetooth antenna at the antenna socket, realize the automatic switch-over between built-in bluetooth antenna and the external bluetooth antenna, thereby use external bluetooth antenna or built-in bluetooth antenna in the definite bluetooth device, make a bluetooth antenna's hardware version just can adapt to multiple different product forms and application scene, two kinds of bluetooth antenna's hardware design method has been unified, hardware development and maintenance's cost has effectively been reduced.
Description
Technical Field
The utility model relates to an on-vehicle multimedia technology field especially relates to a bluetooth device and car suitable for on-vehicle multimedia equipment.
Background
Bluetooth is a necessary function of vehicle-mounted multimedia equipment (vehicle machine), and a smart phone of a user can be connected with the vehicle machine and can communicate with the vehicle machine, so that information interaction between the smart phone and a vehicle is realized.
The existing Bluetooth antenna of the vehicle-mounted multimedia equipment has two forms; one is an external antenna (such as a rod antenna or a copper tube antenna) and is installed at an antenna socket on the back of a vehicle machine; one is a built-in antenna configuration integrated on a vehicle circuit board (also called a PCB antenna), typically an inverted F antenna. The antenna state selected by different vehicle machines depends on the installation environment and the actual application scene of the vehicle machine equipment. In order to meet the requirements of different products, hardware managers need to design and maintain two hardware versions of the Bluetooth antenna.
Therefore, when the vehicle-mounted multimedia device is subjected to hardware management, two hardware versions need to be designed and maintained aiming at two forms of the existing bluetooth antenna of the vehicle-mounted multimedia device, and the hardware development and maintenance cost is increased.
SUMMERY OF THE UTILITY MODEL
The utility model provides a bluetooth device and car suitable for on-vehicle multimedia equipment for two kinds of forms that the bluetooth antenna of solving on-vehicle multimedia equipment among the prior art exists need design, maintain two kinds of hardware versions, have increased the defect of hardware development and maintenance cost, and the hardware version that has realized a bluetooth antenna can adapt to different product forms and application scene, reduces the cost of hardware development and maintenance.
On one hand, the utility model provides a bluetooth device suitable for vehicle-mounted multimedia equipment, which comprises an external bluetooth antenna, an internal bluetooth antenna arranged on the mainboard of the vehicle-mounted multimedia equipment, a bluetooth module and an antenna socket used for connecting the external bluetooth antenna;
the antenna socket and the built-in Bluetooth antenna are both connected with the Bluetooth module;
when the antenna socket is inserted into the external Bluetooth antenna, the Bluetooth module transmits data through the external Bluetooth antenna, and when the antenna socket is not inserted into the external Bluetooth antenna, the Bluetooth module transmits data through the internal Bluetooth antenna.
Furthermore, the Bluetooth device suitable for the vehicle-mounted multimedia equipment further comprises a gating switch;
a fixed wiring terminal of the gating switch is connected with the Bluetooth module, a first selection wiring terminal of the gating switch is connected with the antenna socket, and a second selection wiring terminal of the gating switch is connected with the built-in Bluetooth antenna;
when the antenna socket is inserted into the external Bluetooth antenna, the gating switch is communicated with the first selection wiring end and the fixed wiring end, and when the antenna socket is not inserted into the external Bluetooth antenna, the gating switch is communicated with the second selection wiring end and the fixed wiring end.
Furthermore, the Bluetooth device suitable for the vehicle-mounted multimedia equipment further comprises a switch control module;
the switch control module is connected with the gating switch;
when the antenna socket is inserted into the external Bluetooth antenna, the switch control module sends out a first control signal to enable the gating switch to be communicated with the first selection wiring terminal and the fixed wiring terminal; when the antenna socket is not inserted into the external Bluetooth antenna, the switch control module sends out a second control signal, so that the gating switch is communicated with the second selection wiring end and the fixed wiring end.
Further, the bluetooth device suitable for the vehicle-mounted multimedia equipment comprises a switch control module and a control module, wherein the switch control module comprises a detection unit and a main control unit;
the detection unit is used for detecting the grounding state of a mechanical metal elastic sheet in the antenna socket, and the main control unit is used for sending the first control signal when the mechanical metal elastic sheet is in a non-grounding state and sending the second control signal when the mechanical metal elastic sheet is in a grounding state.
Further, the bluetooth device suitable for the vehicle-mounted multimedia equipment comprises a detection unit and a control unit, wherein the detection unit comprises a voltage detection circuit;
a first detection end of the voltage detection circuit is connected with the mechanical metal elastic sheet, a second detection end of the voltage detection circuit is connected with a contact which is in a grounding state on the vehicle-mounted multimedia equipment mainboard, and a voltage value between the mechanical metal elastic sheet and the contact is output by a voltage output end of the voltage detection circuit;
when the voltage value is greater than or equal to a preset voltage, the mechanical metal elastic sheet is in a non-grounding state, and when the voltage value is less than the preset voltage, the mechanical metal elastic sheet is in a grounding state.
Further, the bluetooth device suitable for the vehicle-mounted multimedia equipment comprises a main control unit and a Bluetooth module, wherein the main control unit comprises an A/D converter;
the input end of the A/D converter is connected with the voltage output end of the voltage detection circuit, and the output end of the A/D converter is connected with the gating switch;
the A/D converter outputs the first control signal when the voltage value output by the voltage output end is greater than or equal to the preset voltage, and outputs the second control signal when the voltage value is less than the preset voltage.
Further, the gating switch is a radio frequency switch chip; the effective frequency range of the radio frequency switch chip covers the frequency range of the Bluetooth signal sent by the Bluetooth module.
Further, the radio frequency switch chip is PE42421 for the bluetooth device suitable for the vehicle-mounted multimedia device.
Further, the Bluetooth device suitable for the vehicle-mounted multimedia equipment is characterized in that the built-in Bluetooth antenna is an onboard inverted-F PCB antenna.
On the other hand, the utility model provides a car, including foretell a bluetooth device suitable for on-vehicle multimedia equipment.
The utility model provides a pair of bluetooth device and car suitable for on-vehicle multimedia equipment, through with external bluetooth antenna and built-in bluetooth antenna integration in an on-vehicle multimedia equipment, in the use scene of difference, can be through inserting external bluetooth antenna at the antenna socket, realize the automatic switch-over between built-in bluetooth antenna and the external bluetooth antenna, thereby use external bluetooth antenna or built-in bluetooth antenna in the definite bluetooth device, make a bluetooth antenna's hardware version just can adapt to multiple different product forms and application scene, two kinds of bluetooth antenna's hardware design method has been unified, hardware development and maintenance's cost has effectively been reduced.
Drawings
In order to more clearly illustrate the technical solutions of the present invention or the prior art, the following briefly introduces the drawings required for the embodiments or the prior art descriptions, and obviously, the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic diagram of a conventional bluetooth device of an on-vehicle multimedia device with an external bluetooth antenna provided by the present invention;
fig. 2 is a schematic diagram of a conventional bluetooth device of an in-vehicle multimedia apparatus with a built-in bluetooth antenna provided by the present invention;
fig. 3 is a schematic structural diagram of a bluetooth device suitable for a vehicle-mounted multimedia device provided by the present invention;
fig. 4 is a schematic diagram of a system software control flow applicable to the vehicle-mounted multimedia device.
Detailed Description
To make the objects, technical solutions and advantages of the present invention clearer, the drawings of the present invention are combined to clearly and completely describe the technical solutions of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
First, a bluetooth device of a conventional vehicle-mounted multimedia apparatus will be described.
Fig. 1 is the utility model provides a present bluetooth device of on-vehicle multimedia equipment with external bluetooth antenna's schematic diagram, fig. 2 is the utility model provides a present bluetooth device of on-vehicle multimedia equipment with built-in bluetooth antenna's schematic diagram. Referring to fig. 1 and 2, due to different installation environments and other factors of the existing vehicle-mounted multimedia device (i.e., a vehicle machine), the bluetooth antenna generally has two design schemes, one is an external bluetooth antenna and is installed at an antenna socket on the back of the vehicle machine; the utility model provides a for built-in bluetooth antenna, integrated on the host computer circuit board of car machine. When the installation environment can cause stronger shielding to the signal of built-in bluetooth antenna, for example, when the car machine has adopted closure metal casing, can only choose for use the bluetooth device that only contains external bluetooth antenna, therefore the hardware staff of this car machine need design simultaneously and maintain two kinds of hardware versions, has increased the cost of design and maintenance.
The following is the utility model provides a bluetooth device suitable for on-vehicle multimedia device describes.
On one hand, the utility model provides a bluetooth device suitable for vehicle-mounted multimedia equipment, which comprises an external bluetooth antenna, an internal bluetooth antenna arranged on the mainboard of the vehicle-mounted multimedia equipment, a bluetooth module and an antenna socket used for connecting the external bluetooth antenna;
the antenna socket and the built-in Bluetooth antenna are both connected with the Bluetooth module;
when the antenna socket is inserted into the external Bluetooth antenna, the Bluetooth module transmits data through the external Bluetooth antenna, and when the antenna socket is not inserted into the external Bluetooth antenna, the Bluetooth module transmits data through the internal Bluetooth antenna.
The external Bluetooth antenna can be plugged in and pulled out of the antenna socket, when the external Bluetooth antenna is inserted into the antenna socket, the external Bluetooth antenna is connected with the Bluetooth module, and the Bluetooth module can transmit data through the external Bluetooth antenna.
The built-in Bluetooth antenna is an antenna integrated on the mainboard of the vehicle-mounted multimedia equipment, and the Bluetooth module transmits data through the built-in Bluetooth antenna under the default condition, namely when the Bluetooth device detects that the external Bluetooth antenna is not inserted into the antenna socket, the Bluetooth module is connected with the built-in Bluetooth antenna.
Furthermore, when the Bluetooth device is arranged in the vehicle-mounted multimedia equipment, under the condition that conditions allow, namely if the shell of the vehicle-mounted multimedia equipment is weak in signal shielding of the built-in Bluetooth antenna, and a Bluetooth signal sent by the Bluetooth device can meet the use requirement, the built-in Bluetooth antenna is preferentially used without inserting an external Bluetooth antenna, so that the cost is saved to the greatest extent; when the vehicle-mounted multimedia equipment needs to be cooled or fixed, the closed metal shell is adopted, the metal shell can shield the signal of the built-in Bluetooth antenna strongly, only the external Bluetooth antenna can be used, and the external Bluetooth antenna needs to be inserted at the moment so as to meet the requirement of a user on the Bluetooth signal intensity.
The utility model provides a pair of bluetooth device suitable for on-vehicle multimedia apparatus, through with external bluetooth antenna and built-in bluetooth antenna integration in an on-vehicle multimedia apparatus, in the use scene of difference, can be through inserting external bluetooth antenna at the antenna socket, realize the automatic switch-over between built-in bluetooth antenna and the external bluetooth antenna, thereby use external bluetooth antenna or built-in bluetooth antenna in the definite bluetooth device, make a bluetooth antenna's hardware version just can adapt to multiple different product forms and application scene, two kinds of bluetooth antenna's hardware design method has been unified, hardware development and maintenance's cost has effectively been reduced.
On the basis of the above embodiment, the bluetooth device suitable for the vehicle-mounted multimedia equipment further comprises a gating switch;
a fixed wiring terminal of the gating switch is connected with the Bluetooth module, a first selection wiring terminal of the gating switch is connected with the antenna socket, and a second selection wiring terminal of the gating switch is connected with the built-in Bluetooth antenna;
when the antenna socket is inserted into the external Bluetooth antenna, the gating switch is communicated with the first selection wiring end and the fixed wiring end, and when the antenna socket is not inserted into the external Bluetooth antenna, the gating switch is communicated with the second selection wiring end and the fixed wiring end.
The gating switch has a single input end (namely a fixed wiring end) and a double-output end (namely a selective wiring end), the fixed wiring end is connected with the Bluetooth module, the selective wiring end is respectively connected with the built-in Bluetooth antenna and the external Bluetooth antenna, and the gating switch can be controlled to switch according to a specific application scene, so that a proper Bluetooth antenna is selected, and the requirements of different application scenes are met.
Specifically, the gating switch may be a single-pole double-throw switch, and may also be a radio frequency switch chip, which is not limited in this embodiment.
In the embodiment, the selection of the built-in Bluetooth antenna and the external Bluetooth antenna under different application scenes can be realized through the gating switch, so that the requirements of different application scenes are met.
On the basis of the above embodiment, the bluetooth device suitable for the vehicle-mounted multimedia equipment further comprises a switch control module;
the switch control module is connected with the gating switch;
when the antenna socket is inserted into the external Bluetooth antenna, the switch control module sends out a first control signal to enable the gating switch to be communicated with the first selection wiring terminal and the fixed wiring terminal; when the antenna socket is not inserted into the external Bluetooth antenna, the switch control module sends out a second control signal, so that the gating switch is communicated with the second selection wiring end and the fixed wiring end.
The switch control module can automatically detect whether the external Bluetooth antenna is inserted into the antenna socket or not, and automatically sends out a control signal according to a detection result to realize the control of the connection state of the gating switch.
When the external Bluetooth antenna is inserted into the antenna socket, the switch control module detects the insertion of the external Bluetooth antenna, and sends a first control signal to the gating switch to control the gating switch to connect the Bluetooth module and the external Bluetooth antenna; when the external Bluetooth antenna is not inserted, the switch control module sends a second control signal to the gating switch, and the gating switch is controlled to be connected with the Bluetooth module and the internal Bluetooth antenna, so that switching between the internal Bluetooth antenna and the external Bluetooth antenna is achieved.
In this embodiment, the switch control module can detect the insertion state of the external bluetooth antenna and control the gating switch, so as to achieve the purpose of automatically controlling the gating switch according to the insertion state of the external bluetooth antenna and realize the automatic switching of the bluetooth antenna.
On the basis of the above embodiment, the bluetooth apparatus suitable for the vehicle-mounted multimedia device comprises a switch control module and a control module, wherein the switch control module comprises a detection unit and a main control unit;
the detection unit is used for detecting the grounding state of a mechanical metal elastic sheet in the antenna socket, and the main control unit is used for sending the first control signal when the mechanical metal elastic sheet is in a non-grounding state and sending the second control signal when the mechanical metal elastic sheet is in a grounding state.
For external bluetooth antenna, whether external bluetooth antenna male detecting element need be added for whether there is external bluetooth antenna to insert in detection antenna socket department, the typical mechanical metal shrapnel that can adopt of detection mode realizes, and mechanical metal shrapnel ground connection under the default condition, metal shrapnel no longer ground connection when external bluetooth antenna inserts antenna socket.
Specifically, a mechanical metal spring sheet exists in the antenna socket, a contact exists on a mainboard of the vehicle-mounted multimedia device by the mechanical metal spring sheet, and the contact is in a grounding state.
When the external Bluetooth antenna is not inserted into the antenna socket, the mechanical metal elastic sheet is contacted with the contact, namely the mechanical metal elastic sheet is in a grounding state; when the position Bluetooth antenna is inserted into the antenna socket, the external Bluetooth antenna penetrates through the space between the mechanical metal elastic sheet and the contact, and the external Bluetooth antenna is not contacted with the contact, so that the mechanical metal elastic sheet is not in a grounding state any more, namely, in a non-grounding state, and whether the external Bluetooth antenna is inserted into the antenna socket or not can be determined by detecting the grounding state of the mechanical metal elastic sheet.
The input end of the detection unit is connected with the antenna socket and is used for detecting whether an external Bluetooth antenna is inserted into the antenna socket; the output end is connected with the main control unit and used for outputting the grounding state of the mechanical metal elastic sheet in the antenna socket. The input end of the main control unit is connected with the detection unit and used for receiving a detection result of the detection unit on the grounding state of the mechanical metal elastic sheet; the output end is connected with the gating switch and used for outputting a control signal to the gating switch according to the detection result of the grounding state of the mechanical metal elastic sheet.
Specifically, a circuit of the detection unit can be connected to a GPIO pin of a chip (namely a main control unit) input (with a pull-up resistor) of the main control board, and when no external antenna is inserted, the detection unit inputs a low level to the main control unit due to grounding of a mechanical metal elastic sheet; when the external Bluetooth antenna is inserted, the mechanical metal elastic sheet is not grounded, and the detection unit inputs high level to the main control unit.
Furthermore, after receiving the high level signal sent by the detection unit, the main control unit can send a corresponding high level signal to the gating switch so as to control the gating switch to communicate the Bluetooth module and the external Bluetooth antenna; after receiving the low level signal sent by the detection unit, the main control unit can send a corresponding low level signal to the gating switch so as to control the gating switch to communicate the Bluetooth module and the built-in Bluetooth antenna; or after receiving the high level signal sent by the detection unit, the main control unit can send an opposite low level signal to the gating switch to control the gating switch to communicate the Bluetooth module and the external Bluetooth antenna; after receiving the low level signal sent by the detection unit, the main control unit can send an opposite high level signal to the gating switch so as to control the gating switch to communicate the Bluetooth module and the built-in Bluetooth antenna; the content of the signal sent by the main control unit is not particularly limited in this embodiment.
In this embodiment, the detection unit and the main control unit in the switch control module can detect the grounding state of the mechanical metal elastic sheet in the antenna socket, and can also control the gating switch, thereby realizing the automatic switching between the external bluetooth antenna and the internal bluetooth antenna.
On the basis of the above embodiment, the bluetooth apparatus suitable for the vehicle-mounted multimedia device, wherein the detection unit includes a voltage detection circuit;
a first detection end of the voltage detection circuit is connected with the mechanical metal elastic sheet, a second detection end of the voltage detection circuit is connected with a contact which is in a grounding state on the vehicle-mounted multimedia equipment mainboard, and a voltage value between the mechanical metal elastic sheet and the contact is output by a voltage output end of the voltage detection circuit;
when the voltage value is greater than or equal to a preset voltage, the mechanical metal elastic sheet is in a non-grounding state, and when the voltage value is less than the preset voltage, the mechanical metal elastic sheet is in a grounding state.
The voltage detection circuit is provided with a power supply voltage source for applying voltage between the mechanical metal elastic sheet and the contact, and the preset voltage can be set according to the voltage value of the power supply voltage source; when the mechanical metal elastic sheet is contacted with the contact, the mechanical metal elastic sheet is in a grounding state, and the voltage value between the mechanical metal elastic sheet and the contact is very small, namely the voltage value is smaller than the preset voltage; when the external Bluetooth antenna is inserted, the mechanical metal elastic sheet is not in contact with the contact, the mechanical metal elastic sheet is in a non-grounding state, and the voltage value between the mechanical metal elastic sheet and the contact is larger, namely the voltage value is larger than the preset voltage.
For example, the power supply voltage source is 5V, the preset voltage is set to 2V, and when the measured voltage value is 0.1V, the mechanical metal dome is in a grounded state.
Specifically, the detection unit may use a multimeter or other devices for performing voltage detection, and this embodiment is not particularly limited thereto.
In this embodiment, whether the mechanical metal elastic sheet is in contact with the contact or not is determined by detecting the voltage between the mechanical metal elastic sheet and the contact, so that the insertion state of the external bluetooth antenna can be directly determined.
On the basis of the above embodiment, the bluetooth apparatus suitable for the vehicle-mounted multimedia device includes a main control unit including an a/D converter;
the input end of the A/D converter is connected with the voltage output end of the voltage detection circuit, and the output end of the A/D converter is connected with the gating switch;
the A/D converter outputs the first control signal when the voltage value output by the voltage output end is greater than or equal to the preset voltage, and outputs the second control signal when the voltage value is less than the preset voltage.
The A/D converter is used for converting the voltage signal detected in the voltage detection circuit into a control signal.
In this embodiment, the a/D converter converts the voltage signal in the voltage detection circuit into a control signal, thereby implementing control of the gating switch according to the insertion condition of the external bluetooth antenna.
Specifically, fig. 3 is the utility model provides a bluetooth device's schematic structure diagram suitable for on-vehicle multimedia device. Referring to fig. 3, the bluetooth apparatus for the vehicle-mounted multimedia device includes: master control part, bluetooth part, antenna socket, antenna insert detecting element, gating switch, built-in bluetooth antenna and external bluetooth antenna, wherein:
the built-in Bluetooth antenna and the external Bluetooth antenna are used for transmitting data; the antenna socket is used for plugging and unplugging the external Bluetooth antenna, and the external Bluetooth antenna after being plugged can be connected with the Bluetooth part; the antenna insertion detection unit is used for detecting whether an external Bluetooth antenna is inserted into the antenna socket or not so as to send a signal to the main control unit; the main control part is used for receiving a signal sent by the antenna insertion detection unit, sending a control signal to the gating switch according to a detection result of the antenna insertion detection unit, and controlling the gating switch to be connected with the built-in Bluetooth antenna or the external Bluetooth antenna; the gating switch is used for selecting different connection modes according to the control signal of the main control part.
Fig. 4 is a schematic diagram of a control flow of system software suitable for the vehicle-mounted multimedia device according to this embodiment. See fig. 4, where:
under the default condition, namely no external Bluetooth antenna is inserted, an antenna insertion detection circuit (namely a voltage detection circuit) outputs a low-level signal to a main control processor (namely a main control unit); the main control processor receives the low level signal and correspondingly outputs the low level signal to the radio frequency switch chip, the Bluetooth module is connected to the built-in Bluetooth antenna circuit through the gating switch, and when no external Bluetooth antenna is inserted, the system can select a built-in Bluetooth antenna channel;
when the environment does not allow the use of an internal Bluetooth antenna, namely an external Bluetooth antenna is inserted, the antenna insertion detection circuit outputs a high-level signal to the main control processor; the main control processor receives the high level signal and correspondingly outputs the high level signal to the radio frequency switch chip, and the Bluetooth output gate is connected to the external antenna circuit; when external bluetooth antenna inserts like this, the system can be automatically with bluetooth output switch to external bluetooth antenna channel radiation away.
The utility model provides a same bluetooth antenna solution based on-vehicle multimedia device, software and hardware automatic identification equipment uses the scene and controls gating antenna output channel, can let a hardware circuit board multiple application scene of adaptation simultaneously, effectively practices thrift the hardware cost and is convenient for hardware management and maintenance.
On the basis of the above embodiment, the gating switch is a radio frequency switch chip; the effective frequency range of the radio frequency switch chip covers the frequency range of the Bluetooth signal sent by the Bluetooth module.
The rf switch chip is typically a gating-type device for selectively connecting one of the channels of the output to a single input. When selecting the radio frequency switch chip, need to guarantee that the chip has less insertion loss on 2.4G bluetooth frequency channel, the bluetooth signal frequency channel scope that the effective frequency channel scope of radio frequency switch chip covered bluetooth module and sent promptly.
In this embodiment, the radio frequency switch chip is selected as the gating switch, the gating switch can be integrated on the mainboard of the vehicle-mounted multimedia device, and the effective frequency band range of the radio frequency switch chip is determined to cover the frequency band range of the bluetooth signal sent by the bluetooth module, so that the normal work of the radio frequency switch chip can be ensured.
Further, the radio frequency switch chip is PE42421 for the bluetooth device suitable for the vehicle-mounted multimedia device.
The PE42421 is a radio frequency switch chip of a typical alternative switch, wherein a single input end of the PE42421 is connected to the bluetooth module, and two-way outputs are respectively connected to the internal bluetooth antenna and the external bluetooth antenna; and when the PE42421 receives the first control signal, the output end is connected to the external antenna, and when the PE 42receives the second control signal, the output end is connected to the internal Bluetooth antenna.
In this embodiment, the PE42421 is used as a radio frequency switch chip, so that the input end and the output end of the chip can be maximally utilized, and the hardware maintenance cost is saved.
Further, the Bluetooth device suitable for the vehicle-mounted multimedia equipment is characterized in that the built-in Bluetooth antenna is an onboard inverted-F PCB antenna.
Use board to carry the type of falling F PCB antenna as built-in bluetooth antenna in this embodiment, through integrated on-vehicle multimedia device's mainboard, can be so that the bluetooth device not inserting under the condition of external bluetooth antenna, acquiesce to use this board to carry type of falling F PCB antenna transmission signal to accomplish the output of bluetooth signal under the more condition of saving the cost.
In another aspect, the present embodiment provides a vehicle, including the above bluetooth device suitable for a vehicle-mounted multimedia device.
The embodiment provides a vehicle, which comprises a Bluetooth device suitable for vehicle-mounted multimedia equipment, wherein an external Bluetooth antenna and an internal Bluetooth antenna are integrated in the vehicle-mounted multimedia equipment, and in different use scenes, the external Bluetooth antenna can be inserted into an antenna socket to realize automatic switching between the internal Bluetooth antenna and the external Bluetooth antenna, so that the external Bluetooth antenna or the internal Bluetooth antenna is determined to be used in the Bluetooth device, a hardware version of the Bluetooth antenna can adapt to various different product forms and application scenes, hardware design methods of two Bluetooth antennas are unified, and hardware development and maintenance costs are effectively reduced.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (9)
1. A Bluetooth device suitable for vehicle-mounted multimedia equipment is characterized by comprising an external Bluetooth antenna, an internal Bluetooth antenna, a Bluetooth module, an antenna socket and a gating switch, wherein the internal Bluetooth antenna, the Bluetooth module, the antenna socket and the gating switch are arranged on a main board of the vehicle-mounted multimedia equipment;
the antenna socket and the built-in Bluetooth antenna are both connected with the Bluetooth module;
a fixed wiring terminal of the gating switch is connected with the Bluetooth module, a first selection wiring terminal of the gating switch is connected with the antenna socket, and a second selection wiring terminal of the gating switch is connected with the built-in Bluetooth antenna;
when the antenna socket is inserted into the external Bluetooth antenna, the gating switch is communicated with the first selection wiring end and the fixed wiring end, the Bluetooth module transmits data through the external Bluetooth antenna, when the antenna socket is not inserted into the external Bluetooth antenna, the gating switch is communicated with the second selection wiring end and the fixed wiring end, and the Bluetooth module transmits data through the internal Bluetooth antenna.
2. The Bluetooth device applicable to the vehicle-mounted multimedia equipment is characterized by further comprising a switch control module;
the switch control module is connected with the gating switch;
when the antenna socket is inserted into the external Bluetooth antenna, the switch control module sends out a first control signal to enable the gating switch to be communicated with the first selection wiring terminal and the fixed wiring terminal; when the antenna socket is not inserted into the external Bluetooth antenna, the switch control module sends out a second control signal, so that the gating switch is communicated with the second selection wiring end and the fixed wiring end.
3. The bluetooth device suitable for the vehicle-mounted multimedia equipment according to claim 2, wherein the switch control module comprises a detection unit and a main control unit;
the detection unit is used for detecting the grounding state of a mechanical metal elastic sheet in the antenna socket, and the main control unit is used for sending the first control signal when the mechanical metal elastic sheet is in a non-grounding state and sending the second control signal when the mechanical metal elastic sheet is in a grounding state.
4. The Bluetooth device applicable to vehicle-mounted multimedia equipment of claim 3, wherein the detection unit comprises a voltage detection circuit;
a first detection end of the voltage detection circuit is connected with the mechanical metal elastic sheet, a second detection end of the voltage detection circuit is connected with a contact which is in a grounding state on the vehicle-mounted multimedia equipment mainboard, and a voltage value between the mechanical metal elastic sheet and the contact is output by a voltage output end of the voltage detection circuit;
when the voltage value is greater than or equal to a preset voltage, the mechanical metal elastic sheet is in a non-grounding state, and when the voltage value is less than the preset voltage, the mechanical metal elastic sheet is in a grounding state.
5. The Bluetooth device applicable to vehicle-mounted multimedia equipment of claim 4, wherein the main control unit comprises an A/D converter;
the input end of the A/D converter is connected with the voltage output end of the voltage detection circuit, and the output end of the A/D converter is connected with the gating switch;
the A/D converter outputs the first control signal when the voltage value output by the voltage output end is greater than or equal to the preset voltage, and outputs the second control signal when the voltage value is less than the preset voltage.
6. The bluetooth device suitable for the vehicle-mounted multimedia equipment according to claim 1, wherein the gating switch is a radio frequency switch chip;
the effective frequency range of the radio frequency switch chip covers the frequency range of the Bluetooth signal sent by the Bluetooth module.
7. The Bluetooth device of claim 6, wherein the RF switch chip is PE 42421.
8. The bluetooth device suitable for the vehicle-mounted multimedia equipment according to claim 1, wherein the built-in bluetooth antenna is an on-board inverted F PCB antenna.
9. A vehicle comprising a bluetooth device suitable for a vehicle multimedia apparatus according to any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023275595.1U CN214378816U (en) | 2020-12-29 | 2020-12-29 | Bluetooth device and car suitable for on-vehicle multimedia equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023275595.1U CN214378816U (en) | 2020-12-29 | 2020-12-29 | Bluetooth device and car suitable for on-vehicle multimedia equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214378816U true CN214378816U (en) | 2021-10-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023275595.1U Active CN214378816U (en) | 2020-12-29 | 2020-12-29 | Bluetooth device and car suitable for on-vehicle multimedia equipment |
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| Country | Link |
|---|---|
| CN (1) | CN214378816U (en) |
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2020
- 2020-12-29 CN CN202023275595.1U patent/CN214378816U/en active Active
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