Six-sound-channel three-frequency-division automobile sound equipment

Abstract

The utility model discloses a six-sound-channel three-frequency-division automobile sound box, which adopts the design of two power amplifier modules, one power amplifier module is four-sound-channel output, the other power amplifier module is two groups of CENTER middle outputs which are matched left and right, a six-sound-channel power amplifier output function is realized, and the two groups of CENTER middle outputs which are matched left and right physically compensate the tone quality of intermediate frequency and high frequency. Meanwhile, the output function of the subwoofer is added, so that the bass is thicker and firmer, the layering sense of the high pitch, the alto pitch and the bass is clearer, the beauty of music is better reflected, and the experience feeling is stronger; in addition, the volume and amplitude of the FL signal source and the FR signal source can be respectively adjusted through the arrangement of the middle volume control module, and the proportions of high and low frequency components in the FL signal source and the FR signal source can be respectively adjusted through the arrangement of the treble and bass attenuation circuit control module, so that the alto is fully played, and an ideal alto state is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of automobile audio, and in particular relates to a six-channel three-frequency automobile audio system. Background Art

[0002] At present, car audio is a device for receiving and playing audio to relieve the boredom of drivers and passengers during travel. The earliest use was car AM radio, followed by AM / FM radio, tape player, and then developed to CD player and compatible DCC, DAT digital audio.

[0003] However, existing car audio generally adopts TDA7388 channel amplifier chip (i.e., class AB audio amplifier) ​​with 4-channel design, such as FL front left channel, FR front right channel, RL rear left channel and RR rear right channel; this type of car audio has the problems of impure mid- and high-frequency sound quality and poor bass effect, resulting in confusion of the layers of treble, mid-range and bass, affecting the playback effect of the audio and poor user experience. Utility Model Content

[0004] The problem to be solved by the utility model is to provide a six-channel three-frequency car audio system which can make the layers of treble, midrange and bass more distinct, better reflect the beauty of music, provide better listening effect and stronger experience.

[0005] In order to solve the above technical problems, the utility model provides a six-channel three-frequency car audio system, which includes an MCU control module, a sound effect control module, an RCA signal source preprocessing module, a center volume control module, a high and low frequency attenuation circuit control module, a first power amplifier module and a second power amplifier module;

[0006] The audio input end of the sound effect control module is electrically connected to the audio output end of the MCU control module, and the sound effect control module is used to adjust the sound effect of the audio signal sent by the MCU control module and output 4 groups of RCA signal sources, and the 4 groups of RCA signal sources are FL signal source, FR signal source, RL signal source and RR signal source respectively; the audio output end of the sound effect control module includes a first FL signal source output end, a first FR signal source output end, a second FL signal source output end, a second FR signal source output end, an RL signal source output end and an RR signal source output end;

[0007] The four input ends of the first power amplifier module are electrically connected to the first FL signal source output end, the first FR signal source output end, the RL signal source output end and the RR signal source output end respectively, and the first power amplifier module is used to amplify the FL signal source, the FR signal source, the RL signal source and the RR signal source processed by the sound effect control module to a power capable of driving a full-range speaker; the four output ends of the first power amplifier module are four output interfaces for connecting to full-range speakers respectively;

[0008] The two input ends of the RCA signal source preprocessing module are electrically connected to the second FL signal source output end and the second FR signal source output end respectively, and the two output ends of the RCA signal source preprocessing module are electrically connected to the two input ends of the center volume control module; the RCA signal source preprocessing module is used to extract the medium and high frequency signals in the FL signal source and the FR signal source output by the sound effect control module and send them to the center volume control module; the center volume control module is used to adjust the volume and amplitude of the FL signal source and the FR signal source sent by the RCA signal source preprocessing module respectively;

[0009] The two input ends of the high and low frequency attenuation circuit control module are electrically connected to the two output ends of the center volume control module, and the two output ends of the high and low frequency attenuation circuit control module are electrically connected to the two input ends of the second power amplifier module; the high and low frequency attenuation circuit control module is used to respectively adjust the proportion of high and low frequency components in the FL signal source and the FR signal source processed by the center volume control module; the second power amplifier module is used to amplify the FL signal source and the FR signal source processed by the high and low frequency attenuation circuit control module to a power capable of driving the center speaker; the two output ends of the second power amplifier module are two center output interfaces for connecting the center speaker;

[0010] The audio output end of the sound effect control module also includes a low-frequency output end for outputting a low-frequency signal, and the low-frequency output end is provided with two output interfaces for connecting to a subwoofer.

[0011] As a preferred solution of the utility model, the six-channel three-way car audio system also includes a mute circuit control module, an input end of the mute circuit control module is electrically connected to the MCU control module, and an output end of the mute circuit control module is electrically connected to the first power amplifier module, the second power amplifier module and the sound effect control module respectively; the mute circuit control module is used to stop the audio signal output of the first power amplifier module, the second power amplifier module and the sound effect control module.

[0012] As a preferred embodiment of the present invention, the six-channel three-frequency car audio system also includes a display, a switch button, a volume adjustment knob, an SD interface, a USB interface, an AUX input interface, a MIC microphone input interface, a radio, a crystal oscillator and an FM antenna, which are electrically connected to the MCU control module respectively.

[0013] As a preferred embodiment of the present utility model, the six-channel three-way car audio system also includes a power input module, which includes a 12V DC battery, a 5V DC transformer, a 5V power management chip and a car key 12V detection input system; the 12V DC battery is electrically connected to the MCU control module through a 5V DC transformer; the 12V DC battery is electrically connected to the MCU control module through a 5V power management chip; the 12V DC battery is electrically connected to the MCU control module through the car key 12V detection input system, and an ignition lock switch is connected between the 12V DC battery and the car key 12V detection input system.

[0014] As a preferred solution of the utility model, the 5V power management chip is the HT7550 voltage difference linear voltage stabilizing power supply chip.

[0015] As a preferred solution of the utility model, the 12V DC battery is electrically connected to a voltage-stabilizing charging system.

[0016] As a preferred solution of the present utility model, the central speaker is a tweeter or a mid-treble speaker.

[0017] As a preferred solution of the present utility model, the MCU control module is communicatively connected with the central volume control module.

[0018] As a preferred solution of the present utility model, the MCU control module is an MCU control module integrating Bluetooth function and audio decoding function.

[0019] As a preferred solution of the present utility model, the MCU control module is electrically connected to a remote control receiving head.

[0020] As a preferred solution of the present utility model, the remote control receiving head is an infrared receiving head.

[0021] Compared with the prior art, the six-channel three-frequency car audio system of the present invention has the following beneficial effects:

[0022] (1) The utility model adopts two amplifier modules, one of which is a 4-channel output, and the other is a CENTER output of two groups of left and right collocations, realizing the six-channel amplifier output function. In particular, the two groups of left and right collocations of CENTER outputs physically compensate for the sound quality of the intermediate frequency and high frequency, making the intermediate frequency fuller and the treble brighter and more powerful. At the same time, a subwoofer output function is added, making the bass thicker and stronger, so that the layers of treble, intermediate frequency and bass are more distinct, better reflecting the beauty of music, better listening effect and stronger experience;

[0023] (2) The utility model can adjust the volume and amplitude of the FL signal source and the FR signal source sent by the RCA signal source preprocessing module respectively through the setting of the central volume control module to achieve an ideal volume state;

[0024] (3) The utility model adjusts the proportion of high and low frequency components in the FL signal source and the FR signal source processed by the center volume control module through the setting of the high and low frequency attenuation circuit control module, so that the mid-range can be brought into full play, thereby achieving an ideal mid-range state. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solution of the embodiment of the utility model, the drawings of the embodiment will be briefly introduced below.

[0026] Figure 1 It is a principle frame diagram of a six-channel three-frequency car audio system provided by an embodiment of the utility model. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like used in the present invention to indicate the orientation or position relationship is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0029] like Figure 1 Shown is a preferred embodiment of the utility model.

[0030] A six-channel three-frequency car audio system comprises an MCU control module, a sound effect control module, an RCA signal source preprocessing module, a center volume control module, a high and low frequency attenuation circuit control module, a first power amplifier module and a second power amplifier module.

[0031] The audio input end of the sound effect control module is electrically connected to the audio output end of the MCU control module. The sound effect control module is used to adjust the sound effect of the audio signal sent by the MCU control module and output 4 groups of RCA signal sources, and the 4 groups of RCA signal sources are FL signal source, FR signal source, RL signal source and RR signal source respectively; the audio output end of the sound effect control module includes a first FL signal source output end, a first FR signal source output end, a second FL signal source output end, a second FR signal source output end, an RL signal source output end and an RR signal source output end. In this embodiment, the sound effect control module is preferably a PT2312 or PT2313 four-channel output digital control audio processing chip.

[0032] The four input ends of the first power amplifier module are electrically connected to the first FL signal source output end, the first FR signal source output end, the RL signal source output end and the RR signal source output end respectively. The first power amplifier module is used to amplify the FL signal source, FR signal source, RL signal source and RR signal source processed by the sound effect control module to a power that can drive the full-range speaker; the four output ends of the first power amplifier module are four output interfaces for connecting to the full-range speaker. In this embodiment, the first power amplifier module is preferably a TDA7388 channel amplifier chip.

[0033] The two input ends of the RCA signal source preprocessing module are electrically connected to the second FL signal source output end and the second FR signal source output end, respectively, and the two output ends of the RCA signal source preprocessing module are electrically connected to the two input ends of the center volume control module; the RCA signal source preprocessing module is used to extract the medium and high frequency signals in the FL signal source and the FR signal source output by the sound effect control module and send them to the center volume control module; the center volume control module is used to adjust the volume and amplitude of the FL signal source and the FR signal source sent by the RCA signal source preprocessing module. In this embodiment, the center volume control module is preferably a PT2313 four-channel output digital control audio processing chip.

[0034] The two input ends of the high and low frequency attenuation circuit control module are electrically connected to the two output ends of the center volume control module, and the two output ends of the high and low frequency attenuation circuit control module are electrically connected to the two input ends of the second power amplifier module; the high and low frequency attenuation circuit control module is used to respectively adjust the proportion of high and low frequency components in the FL signal source and the FR signal source processed by the center volume control module; the second power amplifier module is used to amplify the FL signal source and the FR signal source processed by the high and low frequency attenuation circuit control module to a power that can drive the center speaker; the two output ends of the second power amplifier module are two center output interfaces for connecting the center speaker. In this embodiment, the second power amplifier module is preferably a TDA7388 channel power amplifier chip; the center speaker is preferably a tweeter or a mid-treble speaker.

[0035] The audio output end of the sound effect control module also includes a low-frequency output end for outputting a low-frequency signal, and the low-frequency output end is provided with two output interfaces for connecting to a subwoofer.

[0036] Therefore, according to the six-channel three-way car audio of the utility model, its advantages are: first, it adopts two power amplifier module designs, one of which is a four-channel output, and the other is two groups of left and right CENTER outputs, realizing the six-channel power amplifier output function, especially the two groups of left and right CENTER outputs physically compensate the sound quality of the intermediate frequency and the high frequency, making the intermediate frequency fuller and the treble brighter and more powerful, and at the same time adding the subwoofer output function, making the bass thicker and stronger, so that the layering of the treble, the intermediate frequency and the bass is more distinct, better reflecting the beauty of music, the listening effect is better, and the experience is stronger; second, through the setting of the center volume control module, the volume and amplitude of the FL signal source and the FR signal source sent by the RCA signal source preprocessing module can be adjusted respectively to achieve the ideal size state; third, through the setting of the high and low bass attenuation circuit control module, the proportion of high and low frequency components in the FL signal source and the FR signal source processed by the center volume control module is adjusted respectively, so that the intermediate frequency can be brought to the extreme, thereby achieving the ideal intermediate frequency state.

[0037] Exemplarily, in order to realize a one-touch mute function, the six-channel three-frequency car audio system also includes a mute circuit control module, an input end of the mute circuit control module is electrically connected to the MCU control module, and an output end of the mute circuit control module is electrically connected to the first power amplifier module, the second power amplifier module and the sound effect control module respectively; the mute circuit control module is used to stop the audio signal output of the first power amplifier module, the second power amplifier module and the sound effect control module.

[0038] Exemplarily, the six-channel three-way car audio system also includes a display, a switch button, a volume adjustment knob, an SD interface, a USB interface, an AUX input interface, a MIC microphone input interface, a radio, a crystal oscillator and an FM antenna, which are electrically connected to the MCU control module respectively.

[0039] Exemplarily, the six-channel three-way car audio system also includes a power input module, which includes a 12V DC battery, a 5V DC transformer, a 5V power management chip and a car key 12V detection input system; the 12V DC battery is electrically connected to the MCU control module through a 5V DC transformer; the 12V DC battery is electrically connected to the MCU control module through a 5V power management chip; the 12V DC battery is electrically connected to the MCU control module through the car key 12V detection input system, and an ignition lock switch is connected between the 12V DC battery and the car key 12V detection input system. Among them, the 12V DC battery is used to input 12V DC power to the audio system; the 5V DC transformer is used to step down the battery's 12V DC power to a 5V DC input; the power management chip is used to provide a stable 5V DC input;

[0040] Exemplarily, the 12V DC battery is electrically connected to a voltage-stabilizing charging system to ensure stability and safety during battery charging.

[0041] Exemplarily, the 5V power management chip is preferably an HT7550 voltage difference linear voltage regulator power chip to ensure stability and safety when powered by a battery.

[0042] Exemplarily, the MCU control module is communicatively connected with the center volume control module, so that the MCU control module can directly send an adjustment instruction to the center volume control module.

[0043] Exemplarily, the MCU control module is an MCU control module that integrates Bluetooth function and audio decoding function, and can support multiple lossless playback formats, such as FLAC, APE, WAV, AAC, OGG and other lossless playback.

[0044] Exemplarily, in order to realize the wireless remote control function, the MCU control module is electrically connected to a remote control receiving head, which is preferably an infrared receiving head.

[0045] In the description of the present invention, it should be understood that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" used in the present invention should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the scope of the patent application of the present invention are still within the scope covered by the present invention.

Claims

1. A six-channel three-frequency car audio system, characterized in that: It includes an MCU control module, a sound effect control module, an RCA signal source preprocessing module, a center volume control module, a high and low frequency attenuation circuit control module, a first power amplifier module and a second power amplifier module; The audio input end of the sound effect control module is electrically connected to the audio output end of the MCU control module, and the sound effect control module is used to adjust the sound effect of the audio signal sent by the MCU control module and output 4 groups of RCA signal sources, and the 4 groups of RCA signal sources are FL signal source, FR signal source, RL signal source and RR signal source respectively; the audio output end of the sound effect control module includes a first FL signal source output end, a first FR signal source output end, a second FL signal source output end, a second FR signal source output end, an RL signal source output end and an RR signal source output end; The four input ends of the first power amplifier module are electrically connected to the first FL signal source output end, the first FR signal source output end, the RL signal source output end and the RR signal source output end respectively, and the first power amplifier module is used to amplify the FL signal source, the FR signal source, the RL signal source and the RR signal source processed by the sound effect control module to a power capable of driving a full-range speaker; the four output ends of the first power amplifier module are four output interfaces for connecting to full-range speakers respectively; The two input ends of the RCA signal source preprocessing module are electrically connected to the second FL signal source output end and the second FR signal source output end respectively, and the two output ends of the RCA signal source preprocessing module are electrically connected to the two input ends of the center volume control module; The RCA signal source preprocessing module is used to extract the mid-high frequency signals from the FL signal source and the FR signal source output by the sound effect control module and send them to the center volume control module; the center volume control module is used to adjust the volume and amplitude of the FL signal source and the FR signal source sent by the RCA signal source preprocessing module respectively; The two input ends of the high and low frequency attenuation circuit control module are electrically connected to the two output ends of the center volume control module, and the two output ends of the high and low frequency attenuation circuit control module are electrically connected to the two input ends of the second power amplifier module; the high and low frequency attenuation circuit control module is used to respectively adjust the proportion of high and low frequency components in the FL signal source and the FR signal source processed by the center volume control module; the second power amplifier module is used to amplify the FL signal source and the FR signal source processed by the high and low frequency attenuation circuit control module to a power capable of driving the center speaker; the two output ends of the second power amplifier module are two center output interfaces for connecting the center speaker; The audio output end of the sound effect control module also includes a low-frequency output end for outputting a low-frequency signal, and the low-frequency output end is provided with two output interfaces for connecting to a subwoofer.

2. The six-channel three-frequency car audio system according to claim 1, characterized in that: It also includes a mute circuit control module, the input end of the mute circuit control module is electrically connected to the MCU control module, and the output end of the mute circuit control module is electrically connected to the first power amplifier module, the second power amplifier module and the sound effect control module respectively; the mute circuit control module is used to stop the audio signal output of the first power amplifier module, the second power amplifier module and the sound effect control module.

3. The six-channel three-frequency car audio system according to claim 1, characterized in that: It also includes a display, a switch button, a volume adjustment knob, an SD interface, a USB interface, an AUX input interface, a MIC microphone input interface, a radio, a crystal oscillator and an FM antenna which are electrically connected to the MCU control module respectively.

4. The six-channel three-frequency car audio system according to claim 1, characterized in that: It also includes a power input module, which includes a 12V DC battery, a 5V DC transformer, a 5V power management chip and a car key 12V detection input system; the 12V DC battery is electrically connected to the MCU control module through the 5V DC transformer; the 12V DC battery is electrically connected to the MCU control module through the 5V power management chip; the 12V DC battery is electrically connected to the MCU control module through the car key 12V detection input system, and an ignition lock switch is connected between the 12V DC battery and the car key 12V detection input system.

5. The six-channel three-frequency car audio system as claimed in claim 4, characterized in that: The 5V power management chip is the HT7550 voltage difference linear regulated power supply chip.

6. The six-channel three-frequency car audio system as claimed in claim 4, characterized in that: The 12V DC battery is electrically connected to a voltage-stabilizing charging system.

7. The six-channel three-frequency car audio system as claimed in claim 1, characterized in that: The center speaker is a tweeter or a mid-high pitch speaker.

8. The six-channel three-frequency car audio system as claimed in claim 1, characterized in that: The MCU control module is communicatively connected with the center volume control module.

9. The six-channel three-frequency car audio system as claimed in claim 1, characterized in that: The MCU control module is an MCU control module integrating Bluetooth function and audio decoding function.

10. The six-channel three-frequency car audio system according to claim 1, characterized in that: The MCU control module is electrically connected to a remote control receiving head.

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