CN116800284B - Bluetooth multimedia radio - Google Patents
Bluetooth multimedia radio Download PDFInfo
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- CN116800284B CN116800284B CN202310884089.1A CN202310884089A CN116800284B CN 116800284 B CN116800284 B CN 116800284B CN 202310884089 A CN202310884089 A CN 202310884089A CN 116800284 B CN116800284 B CN 116800284B
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- 238000012545 processing Methods 0.000 claims abstract description 25
- 239000003990 capacitor Substances 0.000 claims description 121
- 230000002093 peripheral effect Effects 0.000 claims description 21
- 239000011324 bead Substances 0.000 claims description 11
- 238000006243 chemical reaction Methods 0.000 claims description 9
- 238000004891 communication Methods 0.000 abstract description 2
- 238000013461 design Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000001914 filtration Methods 0.000 description 3
- 206010063385 Intellectualisation Diseases 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 230000006855 networking Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The invention discloses a Bluetooth multimedia radio, and relates to the field of vehicle-mounted equipment. The bluetooth multimedia radio includes: the Bluetooth wireless communication device comprises a CAN bus control module, an audio power amplifier module, a power processing module, a radio signal receiving module and a Bluetooth multimedia main control module, wherein the CAN bus control module, the audio power amplifier module, the power processing module and the radio signal receiving module are electrically connected with the Bluetooth multimedia main control module, the power processing module is electrically connected with the CAN bus control module and the radio signal receiving module, and the power processing module comprises a bypass filter circuit, a common mode filter circuit and a low pass filter circuit which are sequentially cascaded. The Bluetooth multimedia radio disclosed by the invention can filter various interferences from high frequency to low frequency, and avoid the influence of various interferences on engineering vehicles on radio frequency signals.
Description
Technical Field
The invention belongs to the field of vehicle-mounted equipment, and particularly relates to a Bluetooth multimedia radio.
Background
The vehicle-mounted radio is one of the earliest and most common configurations of a vehicle-mounted video-audio entertainment system, the existing engineering vehicles mostly use independent vehicle-mounted radios, and in recent years, along with the development of engineering vehicle intellectualization and vehicle networking, bluetooth multimedia radios which are used for communication and control on engineering vehicles through CAN buses are increasingly widely used.
However, due to the complex use scene of the engineering vehicle, working conditions such as strong interference and strong noise are often generated in the engineering vehicle, so that the vehicle-mounted radio of the engineering vehicle is often not normally used.
Therefore, how to provide an effective solution to avoid the influence of various interferences on the car radio is a urgent problem in the prior art.
Disclosure of Invention
The present invention is directed to a bluetooth multimedia radio for solving the above-mentioned problems in the prior art.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
in a first aspect, the present invention provides a bluetooth multimedia radio comprising: the device comprises a CAN bus control module, an audio power amplifier module, a power processing module, a radio signal receiving module and a Bluetooth multimedia main control module, wherein the CAN bus control module, the audio power amplifier module, the power processing module and the radio signal receiving module are electrically connected with the Bluetooth multimedia main control module, the power processing module is also electrically connected with the CAN bus control module and the radio signal receiving module, the power processing module comprises a bypass filter circuit, a common mode filter circuit and a low pass filter circuit, and the bypass filter circuit, the common mode filter circuit and the low pass filter circuit are sequentially cascaded;
the bypass filter circuit comprises a first capacitor, a second capacitor, a third capacitor and a fourth capacitor, wherein the first capacitor is a polar capacitor, the anode of the first capacitor is connected with the power input end, the cathode of the first capacitor is grounded, and the second capacitor, the third capacitor and the fourth capacitor are all connected with the first capacitor in parallel;
the common mode filter circuit comprises a fifth capacitor, a sixth capacitor, a seventh capacitor, an eighth capacitor, a ninth capacitor, a tenth capacitor, a resistor, a first inductor, a second inductor, a third inductor and a fourth inductor, wherein the third inductor is connected between one end of the second inductor and the audio power amplifier module, one end of the first inductor is connected with the output end of the bypass filter circuit after being connected with the resistor in parallel, the other end of the first inductor is connected with one end of the fourth inductor, the other end of the fourth inductor is grounded, the tenth capacitor is a polar capacitor, the positive electrode of the tenth capacitor is connected between the second inductor and the audio power amplifier module, the negative electrode of the tenth capacitor is connected between the fourth inductor and the first inductor, one end of the ninth capacitor is connected between the second inductor and the audio power amplifier module, the other end of the ninth capacitor is connected between the fourth inductor and the first inductor, one end of the seventh capacitor is connected between the second inductor and the audio power amplifier module after being connected in series with the eighth capacitor, the other end of the seventh capacitor is connected between the fourth inductor and the first inductor, one end of the fifth capacitor is connected between the second inductor and the output end of the bypass filter circuit after being connected in series with the sixth capacitor, the other end of the fifth capacitor is connected between the first inductor and the output end of the bypass filter circuit, and the common connection end of the fifth capacitor and the sixth capacitor is connected with the common connection end of the seventh capacitor and the eighth capacitor;
the low-pass filter circuit comprises an eleventh capacitor, a twelfth capacitor and a fifth inductor, wherein the twelfth capacitor is a polar capacitor, the positive electrode of the twelfth capacitor is connected with the audio power amplifier module, the negative electrode of the twelfth capacitor is grounded, one end of the fifth inductor is connected with the audio power amplifier module, the other end of the fifth inductor is connected with the output end of the common mode filter circuit, one end of the eleventh capacitor is grounded, and the other end of the eleventh capacitor is connected between the fifth inductor and the output end of the common mode filter circuit.
In one possible design, the power supply processing module further includes a voltage conversion circuit, and the bypass filter circuit, the common mode filter circuit, the low pass filter circuit, and the voltage conversion circuit are cascaded in order.
In one possible design, the CAN bus control module employs an MCP2515 chip and its peripheral circuitry.
In one possible design, the audio power amplifier module employs a CS8673E chip and its peripheral circuitry.
In one possible design, the radio signal receiving module employs a BK1088E chip and its peripheral circuitry.
In one possible design, the bluetooth multimedia master control module employs an AC6951C chip and its peripheral circuitry.
The beneficial effects are that:
the Bluetooth multimedia radio provided by the invention can filter various interferences from high frequency to low frequency by arranging the power supply processing module comprising the path filter circuit, the common mode filter circuit and the low-pass filter circuit, so that the influence of various interferences on a radio frequency signal on an engineering vehicle is avoided, and the normal use of the radio is ensured.
Drawings
Fig. 1 is a schematic block diagram of a bluetooth multimedia radio according to an embodiment of the present application;
fig. 2 is a schematic circuit diagram of a bypass filter circuit according to an embodiment of the present application;
fig. 3 is a schematic circuit diagram of a common mode filter circuit according to an embodiment of the present disclosure;
fig. 4 is a schematic circuit diagram of a low-pass filter circuit according to an embodiment of the present application.
Detailed Description
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the present invention will be briefly described below with reference to the accompanying drawings and the description of the embodiments or the prior art, and it is obvious that the following description of the structure of the drawings is only some embodiments of the present invention, and other drawings can be obtained according to these drawings without inventive effort to a person skilled in the art. It should be noted that the description of these examples is for aiding in understanding the present invention, but is not intended to limit the present invention.
It will be understood that, although the terms first, second, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another element. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without departing from the scope of example embodiments of the present invention.
The influence of various interferences on the vehicle-mounted radio is avoided, and the embodiment of the application provides a Bluetooth multimedia radio which can filter various interferences from high frequency to low frequency and avoid the influence of various interferences on engineering vehicles on radio frequency signals.
As shown in fig. 1, this embodiment provides a bluetooth multimedia radio, which includes a CAN bus control module, an audio power amplifier module, a power supply processing module, a radio signal receiving module and a bluetooth multimedia main control module, where the CAN bus control module, the audio power amplifier module, the power supply processing module and the radio signal receiving module are all electrically connected with the bluetooth multimedia main control module, the power supply processing module is also electrically connected with the CAN bus control module and the radio signal receiving module, and the power supply processing module, the CAN bus control module, the audio power amplifier module and the radio signal receiving module are all connected with an engineering vehicle interface connector, and the power supply processing module includes a bypass filter circuit, a common mode filter circuit and a low pass filter circuit, and the bypass filter circuit, the common mode filter circuit and the low pass filter circuit are sequentially cascaded.
The power supply processing module is used for filtering a power supply so as to avoid the influence of various interferences on the engineering vehicle on radio frequency signals; the CAN bus control module is connected with the Bluetooth multimedia master control module through an SPI interface and is used for signal conversion; the audio power amplifier module inputs the sound of the left and right audio channels output by the Bluetooth multimedia main control module, and outputs the sound to the vehicle-mounted sound box after the sound is amplified by the power amplifier; the radio signal receiving module is used for demodulating video signals and decoding audio; the software control part of the radio is arranged in the Bluetooth multimedia master control module, which comprises but is not limited to a CAN bus protocol analysis processing function, a radio function control function, a multimedia function control function (such as Bluetooth music playing and conversation control, USB flash disk music playing control and audio input control) and the like.
The power supply processing module comprises a bypass filter circuit, a common mode filter circuit and a low-pass filter circuit, and as shown in fig. 2, the bypass filter circuit comprises a first capacitor C1, a second capacitor C2, a third capacitor C3 and a fourth capacitor C4, wherein the first capacitor C1 is a polar capacitor, the positive electrode of the first capacitor C1 is connected with a power supply input end, the negative electrode of the first capacitor C1 is grounded, and the second capacitor C2, the third capacitor C3 and the fourth capacitor C4 are all connected with the first capacitor C1 in parallel. The bypass filter circuit is used for storing energy, reducing fluctuation of power supply voltage, filtering differential mode noise introduced by power supply input, the common mode filter circuit is used for attenuating common film interference, filtering is achieved, and the low-pass filter circuit is used for isolating unnecessary high-frequency signals in the circuit.
As shown in fig. 3, the common mode filter circuit includes a fifth capacitor C5, a sixth capacitor C6, a seventh capacitor C7, an eighth capacitor C8, a ninth capacitor C9, a tenth capacitor C10, a resistor R, a first inductor L1, a second inductor L2, a first magnetic bead L3 and a second magnetic bead L4. The first magnetic bead L3 is connected between one end of the second inductor L2 and the audio power amplifier module, one end of the first inductor L1 is connected in parallel with the resistor R and then connected with the output end of the bypass filter circuit, the other end of the first inductor L1 is connected with one end of the second magnetic bead L4, the other end of the second magnetic bead L4 is grounded, the tenth capacitor C10 is a polar capacitor, the positive electrode of the tenth capacitor C10 is connected between the second inductor L2 and the audio power amplifier module, the negative electrode of the tenth capacitor C10 is connected between the second inductor L4 and the first inductor L1, one end of the ninth capacitor C9 is connected between the second inductor L2 and the audio power amplifier module, the other end of the ninth capacitor C9 is connected between the second inductor L4 and the first inductor L1, one end of the seventh capacitor C7 is connected between the second inductor L2 and the audio power amplifier module in series, the other end of the seventh capacitor C7 is connected between the second inductor L4 and the first inductor L1, one end of the fifth capacitor C5 and the sixth capacitor C6 is connected between the output end of the second inductor L2 and the bypass filter circuit, and the other end of the fifth capacitor C6 is connected between the output end of the seventh capacitor C7 and the eighth capacitor C8 in series.
As shown in fig. 4, the low-pass filter circuit includes an eleventh capacitor C11, a twelfth capacitor C12, and a third inductor L5, where the twelfth capacitor C12 is a polar capacitor, the positive electrode of the twelfth capacitor C12 is connected to the audio power amplifier module, the negative electrode of the twelfth capacitor C12 is grounded, one end of the third inductor L5 is connected to the audio power amplifier module, the other end of the third inductor L5 is connected to the output end of the common mode filter circuit, one end of the eleventh capacitor C11 is grounded, and the other end is connected between the third inductor L5 and the output end of the common mode filter circuit.
By arranging the bypass filter circuit, the common mode filter circuit and the low pass filter circuit, various interferences from high frequency to low frequency can be filtered, the influence of various interferences on the engineering vehicle on radio frequency signals is avoided, and the normal use of the radio is ensured.
In one or more embodiments, to be compatible with the voltage specifications of various engineering vehicles, the power supply processing module may further provide a voltage conversion circuit, and the bypass filter circuit, the common mode filter circuit, the low pass filter circuit, and the voltage conversion circuit are sequentially cascaded. The voltage conversion circuit can be arranged to convert the output voltage of the engineering vehicle, so that the Bluetooth multimedia radio can be compatible with engineering vehicles with various voltage specifications.
The CAN bus control module is connected with the Bluetooth multimedia master control module through an SPI interface and used for signal conversion, and in the embodiment of the application, the CAN bus control module adopts an MCP2515 chip and a peripheral circuit thereof. It is understood that in other embodiments, the CAN bus control module may also use other types of chips and their peripheral circuits, such as SIT2515 chips and their peripheral circuits.
The audio power amplifier module is used for gain amplification of audio signals, and in the embodiment of the application, the audio power amplifier module adopts a CS8673E chip and peripheral circuits thereof. It will be appreciated that in other embodiments, the audio power amplifier module may also use other types of chips and their peripheral circuits, for example, a CS8672 chip and its peripheral circuits, or a CS8676 chip and its peripheral circuits, etc.
The radio signal receiving module is used for receiving radio signals, and in the embodiment of the application, the radio signal receiving module adopts a BK1088E chip and a peripheral circuit thereof. It will be appreciated that in other embodiments, the radio signal receiving module may employ other types of chips and their peripheral circuitry, such as BK1085 chips and their peripheral circuitry.
The Bluetooth multimedia main control module is used for software control of the radio, and in the embodiment of the application, the Bluetooth multimedia main control module adopts an AC6951C chip and a peripheral circuit thereof. It will be appreciated that in other embodiments, the bluetooth multimedia master control module may also employ other types of chips and peripheral circuits thereof, such as an AC6925C chip and peripheral circuits thereof.
In summary, according to the bluetooth multimedia radio provided by the invention, by arranging the power supply processing module comprising the path filter circuit, the common mode filter circuit and the low-pass filter circuit, various interferences from high frequency to low frequency can be filtered, the influence of various interferences on a radio frequency signal on an engineering vehicle is avoided, and the normal use of the radio is ensured.
Finally, it should be noted that: the foregoing description is only of the preferred embodiments of the invention and is not intended to limit the scope of the invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. A bluetooth multimedia radio, comprising: the device comprises a CAN bus control module, an audio power amplifier module, a power processing module, a radio signal receiving module and a Bluetooth multimedia main control module, wherein the CAN bus control module, the audio power amplifier module, the power processing module and the radio signal receiving module are electrically connected with the Bluetooth multimedia main control module, the power processing module is also electrically connected with the CAN bus control module and the radio signal receiving module, the power processing module comprises a bypass filter circuit, a common mode filter circuit and a low pass filter circuit, and the bypass filter circuit, the common mode filter circuit and the low pass filter circuit are sequentially cascaded;
the bypass filter circuit comprises a first capacitor (C1), a second capacitor (C2), a third capacitor (C3) and a fourth capacitor (C4), wherein the first capacitor (C1) is a polar capacitor, the positive electrode of the first capacitor (C1) is connected with the power input end, the negative electrode of the first capacitor (C1) is grounded, and the second capacitor (C2), the third capacitor (C3) and the fourth capacitor (C4) are all connected with the first capacitor (C1) in parallel;
the common mode filter circuit comprises a fifth capacitor (C5), a sixth capacitor (C6), a seventh capacitor (C7), an eighth capacitor (C8), a ninth capacitor (C9), a tenth capacitor (C10), a resistor (R), a first inductor (L1), a second inductor (L2), a first magnetic bead (L3) and a second magnetic bead (L4), wherein the first magnetic bead (L3) is connected between one end of the second inductor (L2) and the audio power amplifier module, one end of the first inductor (L1) is connected with one end of the bypass filter circuit after being connected in parallel with the resistor (R), the other end of the first inductor is connected with one end of the second magnetic bead (L4), the other end of the second magnetic bead (L4) is grounded, the tenth capacitor (C10) is a polar capacitor, the positive electrode of the tenth capacitor (C10) is connected between the second inductor (L2) and the audio power amplifier module, the negative electrode of the tenth capacitor (C10) is connected between the second inductor (L4) and the ninth capacitor (L9), one end of the seventh capacitor (C7) is connected in series with the eighth capacitor (C8) and then is connected between the second inductor (L2) and the audio power amplifier module, the other end of the seventh capacitor is connected between the second magnetic bead (L4) and the first inductor (L1), one end of the fifth capacitor (C5) is connected in series with the sixth capacitor (C6) and then is connected between the second inductor (L2) and the output end of the bypass filter circuit, the other end of the fifth capacitor is connected between the first inductor (L1) and the output end of the bypass filter circuit, and the common connection end of the fifth capacitor (C5) and the sixth capacitor (C6) is connected with the common connection end of the seventh capacitor (C7) and the eighth capacitor (C8);
the low-pass filter circuit comprises an eleventh capacitor (C11), a twelfth capacitor (C12) and a third inductor (L5), wherein the twelfth capacitor (C12) is a polar capacitor, the positive electrode of the twelfth capacitor (C12) is connected with the audio power amplifier module, the negative electrode of the twelfth capacitor (C12) is grounded, one end of the third inductor (L5) is connected with the audio power amplifier module, the other end of the third inductor (L5) is connected with the output end of the common mode filter circuit, one end of the eleventh capacitor (C11) is grounded, and the other end of the eleventh capacitor is connected between the third inductor (L5) and the output end of the common mode filter circuit.
2. The bluetooth multimedia radio according to claim 1, wherein the power processing module further comprises a voltage conversion circuit, the bypass filter circuit, the common mode filter circuit, the low pass filter circuit and the voltage conversion circuit being cascaded in sequence.
3. The bluetooth multimedia radio according to claim 1, wherein the CAN bus control module employs an MCP2515 chip and its peripheral circuitry.
4. The bluetooth multimedia radio according to claim 1, wherein the audio power amplifier module employs a CS8673E chip and its peripheral circuitry.
5. The bluetooth multimedia radio according to claim 1, wherein the radio signal receiving module employs a BK1088E chip and its peripheral circuitry.
6. The bluetooth multimedia radio according to claim 1, wherein the bluetooth multimedia master control module employs an AC6951C chip and its peripheral circuitry.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310884089.1A CN116800284B (en) | 2023-07-18 | 2023-07-18 | Bluetooth multimedia radio |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310884089.1A CN116800284B (en) | 2023-07-18 | 2023-07-18 | Bluetooth multimedia radio |
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| CN116800284A CN116800284A (en) | 2023-09-22 |
| CN116800284B true CN116800284B (en) | 2024-03-12 |
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| CN116800284A (en) | 2023-09-22 |
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