Vehicle-mounted sound equipment control circuit, PCB (printed circuit board) and controller thereof

Abstract

The utility model discloses a vehicle-mounted sound equipment control circuit, a PCB board and a controller thereof, comprising a main control unit, a microprocessor, a DSP sound effect processing unit, a first audio power amplification unit and a second audio power amplification unit, the input end of the DSP sound effect processing unit and the input end of the microprocessor are respectively connected with the main control unit, the first audio power amplification unit is connected with the first audio power amplification unit, and the second audio power amplification unit is connected with the second audio power amplification unit. The output end of the DSP sound effect processing unit and the output end of the microprocessor are respectively connected with the input ends of the first audio power amplification unit and the second audio power amplification unit; the main control unit and the DSP sound effect processing unit are used for carrying out decoding processing and sound effect optimization processing on sound source signals, and the first audio power amplification unit and the second audio power amplification unit send driving signals to external loudspeakers according to control signals and audio signals, so that driving of multiple loudspeakers is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of audio equipment, in particular to a vehicle-mounted audio control circuit, a PCB board and a controller thereof. Background Art

[0002] Traditional car audio systems are usually designed with only one audio power amplifier to output four channels to drive four speakers respectively. If more than four speakers need to be installed on a traditional car audio system, it is necessary to add an additional four-input and six-output or eight-output DSP power amplifier for output conversion to achieve the output of six or eight speakers. However, the installation of the additional DSP power amplifier is more complicated and the modification cost is higher.

[0003] It can be seen that the existing technology still needs to be improved and enhanced. Utility Model Content

[0004] In view of the above-mentioned deficiencies in the prior art, an object of the present invention is to provide a vehicle audio control circuit, which can drive multiple speakers by adding an audio power amplifier unit.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A vehicle audio control circuit comprises a main control unit, a microprocessor, a DSP sound effect processing unit, a first audio power amplifier unit and a second audio power amplifier unit, wherein an input end of the DSP sound effect processing unit and an input end of the microprocessor are respectively connected to the main control unit, an output end of the DSP sound effect processing unit and an output end of the microprocessor are respectively connected to input ends of the first audio power amplifier unit and the second audio power amplifier unit, and output ends of the first audio power amplifier unit and the second audio power amplifier unit are used to drive and control external speakers; the main control unit is used to decode a sound source signal; the DSP sound effect processing unit is used to convert a decoded signal input by the main control unit into an audio signal; and the microprocessor is used to control the working states of the first audio power amplifier unit and the second audio power amplifier unit.

[0007] In the vehicle audio control circuit, the first audio power amplification unit includes a first driver chip U1, pin 4 of the first driver chip U1 is connected to the microprocessor through a first level detection unit, pin 22 of the first driver chip U1 is connected to the microprocessor through a second level detection unit, pin 11, pin 12, pin 14 and pin 15 of the first driver chip U1 are respectively connected to the DSP sound processing unit, and pin 3, pin 5, pin 6, pin 7, pin 9, pin 17, pin 19, pin 20, pin 21 and pin 23 of the first driver chip U1 are respectively connected to the first connector J1.

[0008] In the vehicle audio control circuit, the first level detection unit includes a ninth resistor R9, an eleventh resistor R11 and a nineteenth capacitor C19, one end of the ninth resistor R9 is connected to the microprocessor, the other end of the ninth resistor R9 is respectively connected to one end of the eleventh resistor R11, one end of the nineteenth capacitor C19 and pin 4 of the first driver chip U1, and the other end of the eleventh resistor R11 and the other end of the nineteenth capacitor C19 are respectively grounded.

[0009] In the vehicle audio control circuit, the second level detection unit includes a tenth resistor R10, a twelfth resistor R12 and an eighteenth capacitor C18, one end of the tenth resistor R10 is connected to the microprocessor, and the other end of the tenth resistor R10 is respectively connected to one end of the twelfth resistor R12, one end of the eighteenth capacitor C18 and the pin 22 of the first driving chip U1, and the other end of the twelfth resistor R12 and the other end of the eighteenth capacitor C18 are respectively grounded.

[0010] In the vehicle audio control circuit, the second audio power amplification unit includes a second driver chip U2, pin 4 of the second driver chip U2 is connected to the microprocessor through a third level detection unit, pin 22 of the second driver chip U2 is connected to the microprocessor through a fourth level detection unit, pins 11, 12, 14 and 15 of the second driver chip U2 are all connected to the DSP sound processing unit through a second connector J2, and pins 3, 5, 6, 7, 9, 17, 19, 20, 21 and 23 of the second driver chip U2 are respectively connected to the third connector J3.

[0011] In the vehicle audio control circuit, the third level detection unit includes a ninety-first resistor R91, a one-hundred-eleven resistor R111 and a one-hundred-ninety capacitor C191, one end of the ninety-first resistor R91 is connected to the microprocessor through the second connector J2, and the other end of the ninety-first resistor R91 is respectively connected to one end of the one-hundred-eleven resistor R111, one end of the one-hundred-ninety capacitor C191 and pin 4 of the second driving chip U2, and the other end of the one-hundred-eleven resistor R111 and the other end of the one-hundred-ninety capacitor C191 are respectively grounded.

[0012] In the vehicle audio control circuit, the fourth level detection unit includes a 101 resistor R101, a 120 resistor R120 and a 180 capacitor C180, one end of the 101 resistor R101 is connected to the microprocessor through the second connector J2, the other end of the 101 resistor R101 is respectively connected to one end of the 120 resistor R120, one end of the 180 capacitor C180 and the pin 22 of the second driving chip U2, the other end of the 120 resistor R120 and the other end of the 180 capacitor C180 are respectively grounded.

[0013] The present application also provides a PCB board printed with the above-mentioned vehicle audio control circuit.

[0014] The present application also provides a controller that uses the above-mentioned vehicle audio control circuit to perform operation control.

[0015] Beneficial effects:

[0016] The utility model provides a vehicle-mounted audio control circuit. When a sound source signal is input into the vehicle-mounted audio control circuit, the sound source signal is decoded and processed by a main control unit to obtain an audio decoding signal and a control signal according to the audio signal decoding conversion, and then the audio decoding signal and the control signal are transmitted to a DSP sound effect processing unit, the DSP sound effect processing unit is used to capture the audio data of each section in the audio decoding signal, and the audio data of each section is processed and optimized by a digital signal processing method to improve the sound effect of the sound source signal and suppress noise, and finally the control signal and the processed audio decoding signal are transmitted to a first audio power amplification unit and a second audio power amplification unit, the first audio power amplification unit and the second audio power amplification unit send a driving signal to an external speaker according to the control signal of a microprocessor and the processed audio decoding signal, and the first audio power amplification unit and the second audio power amplification unit are used to drive three-way speakers or four-way speakers respectively, so as to realize the driving of multi-way speakers. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A circuit block diagram of the vehicle audio control circuit provided by the utility model;

[0018] Figure 2 A circuit structure diagram of the first audio power amplification unit in the vehicle audio control circuit provided by the utility model;

[0019] Figure 3 This is a circuit structure diagram of the second audio power amplifier unit in the vehicle audio control circuit provided by the utility model.

[0020] Explanation of the main component symbols: 1-main control unit, 2-DSP sound processing unit, 3-first audio power amplifier unit, 4-second audio power amplifier unit, 5-microprocessor. DETAILED DESCRIPTION

[0021] The utility model provides a vehicle audio control circuit, a PCB board and a controller thereof. In order to make the purpose, technical solution and effect of the utility model clearer and more specific, the utility model is further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0022] In the description of the present utility model, it should be understood that the terms "first", "second" and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features.

[0023] See also Figures 1 to 3 The utility model provides a vehicle audio control circuit, comprising a main control unit 1, a microprocessor 5, a DSP sound effect processing unit 2, a first audio power amplifier unit 3 and a second audio power amplifier unit 4, wherein the input end of the DSP sound effect processing unit 2 and the input end of the microprocessor 5 are respectively connected to the main control unit 1, the output end of the DSP sound effect processing unit 2 and the output end of the microprocessor 5 are respectively connected to the input end of the first audio power amplifier unit 3 and the second audio power amplifier unit 4, and the output end of the first audio power amplifier unit 3 and the second audio power amplifier unit 4 are used to drive and control an external speaker; the main control unit 1 is used to decode a sound source signal; the DSP sound effect processing unit 2 is used to convert the decoded signal input by the main control unit 1 into an audio signal; the microprocessor 5 is used to control the working state of the first audio power amplifier unit 3 and the second audio power amplifier unit 4.

[0024] The working principle of the present application is as follows: when the sound source signal is input into the vehicle audio control circuit, the sound source signal is decoded and processed by the main control unit 1 to obtain an audio decoding signal and a control signal according to the audio signal decoding conversion, and then the audio decoding signal and the control signal are transmitted to the DSP sound effect processing unit 2, and the DSP sound effect processing unit 2 is used to capture the audio data of each segment in the audio decoding signal, and the audio data of each segment is processed and optimized by digital signal processing to improve the sound effect of the sound source signal and suppress noise, and finally the control signal and the processed audio decoding signal are transmitted to the first audio power amplifier unit 3 and the second audio power amplifier unit 4, and the first audio power amplifier unit 3 and the second audio power amplifier unit 4 send a driving signal to the external speaker according to the control signal of the microprocessor 5 and the processed audio decoding signal, and the first audio power amplifier unit 3 and the second audio power amplifier unit 4 are used to drive the three-way speaker or the four-way speaker respectively, so as to realize the driving of multi-way speakers.

[0025] It should be noted that the main control unit 1 can be an audio decoding module composed of an audio DAC decoding chip of model ES9023P, or it can be a main control module composed of a central processing unit such as model UIS8581, QCM615, etc.; it should be noted that the audio decoding module composed of ES9023P, UIS8581 and QCM615 decoding chips is an existing module, and the specific structure and working principle are all existing technologies, which will not be repeated here.

[0026] It should be noted that the microprocessor 5 can be a processing module composed of chips such as the MT32 series and the GD32 series, which mainly controls the power-on timing, various IO / serial ports, etc. The specific structure and working principle are all existing technologies and will not be repeated here.

[0027] It should be noted that the DSP sound processing unit 2 is an existing sound processing module, and the model may be AK7604, AK7738, SI47925, etc. The specific structure and working principle are all existing technologies and will not be repeated here.

[0028] like Figures 1 to 3As shown, further, the first audio power amplification unit 3 includes a first driver chip U1, pin 4 of the first driver chip U1 is connected to the microprocessor 5 through a first level detection unit, pin 22 of the first driver chip U1 is connected to the microprocessor 5 through a second level detection unit, pin 11, pin 12, pin 14 and pin 15 of the first driver chip U1 are respectively connected to the DSP sound effect processing unit 2, and pin 3, pin 5, pin 6, pin 7, pin 9, pin 17, pin 19, pin 20, pin 21 and pin 23 of the first driver chip U1 are respectively connected to the first connector J1; when working, the first driver chip U1 receives the level control signal of the microprocessor 5 through pin 4, and when the first level detection unit detects that the microprocessor 5 sends a high level, the first driver chip U1 enters the startup state, and the first driver chip U1 receives the control signal and the audio decoding signal of the DSP sound effect processing unit 2 through pins 11, 12, 14 and 15, and then controls the conduction state of pins 3, 5, 7, 9, 17, 19, 21 and 23 according to the control signal and the audio decoding signal, so as to control the output signals of its four speakers; when the second level detection unit detects that the microprocessor 5 sends a low level, the first driver chip U1 enters the silent mode, and the audio output of its pins 3, 5, 7, 9, 17, 19, 21 and 23 is prohibited; in addition, by setting the first connector J1, it is convenient to connect with the external speaker.

[0029] In this embodiment, the first driving chip U1 may be a power amplifier chip of model TDA7850.

[0030] like Figures 1 to 3 As shown, further, the first level detection unit includes a ninth resistor R9, an eleventh resistor R11 and a nineteenth capacitor C19, one end of the ninth resistor R9 is connected to the microprocessor 5, the other end of the ninth resistor R9 is respectively connected to one end of the eleventh resistor R11, one end of the nineteenth capacitor C19 and the pin 4 of the first driver chip U1, the other end of the eleventh resistor R11 and the other end of the nineteenth capacitor C19 are respectively grounded; the ninth resistor R9 is used to collect the level signal of the microprocessor 5, and the eleventh resistor R11 and the nineteenth capacitor C19 are used to filter the level signal to improve the stability of the level signal.

[0031] like Figures 1 to 3As shown, further, the second level detection unit includes a tenth resistor R10, a twelfth resistor R12 and an eighteenth capacitor C18, one end of the tenth resistor R10 is connected to the microprocessor 5, the other end of the tenth resistor R10 is respectively connected to one end of the twelfth resistor R12, one end of the eighteenth capacitor C18 and the pin 22 of the first driver chip U1, and the other end of the twelfth resistor R12 and the other end of the eighteenth capacitor C18 are respectively grounded; the tenth resistor R10 is used to collect the level signal of the microprocessor 5, and the twelfth resistor R12 and the eighteenth capacitor C18 are used to filter the level signal to improve the stability of the level signal.

[0032] like Figures 1 to 3 As shown, further, the second audio power amplification unit 4 includes a second driver chip U2, pin 4 of the second driver chip U2 is connected to the microprocessor 5 through a third level detection unit, pin 22 of the second driver chip U2 is connected to the microprocessor 5 through a fourth level detection unit, pins 11, 12, 14 and 15 of the second driver chip U2 are connected to the DSP sound processing unit 2 through a second connector J2, and pins 3, 5, 6, 7, 9, 17, 19, 20, 21 and 23 of the second driver chip U2 are respectively connected to the third connector J3; when working, the second driver chip U2 receives the level control signal of the microprocessor 5 through pin 4, and when the third level detection unit detects that the microprocessor 5 sends a high level When the microprocessor 5 sends a low level, the second driver chip U2 enters the silent mode, and the audio output of its pins 3, 5, 7, 9, 17, 19, 21 and 23 is prohibited; in addition, by setting the second connector J2 and the third connector J3, the DSP sound processing unit 2 and the external speaker can be connected to the second driver chip U2.

[0033] In this embodiment, the second driving chip U2 may be a power amplifier chip of model TDA7850.

[0034] like Figures 1 to 3As shown, further, the third level detection unit includes a ninety-first resistor R91, a one-hundred-eleven resistor R111 and a one-hundred-ninety capacitor C191, one end of the ninety-first resistor R91 is connected to the microprocessor 5 through the second connector J2, the other end of the ninety-first resistor R91 is respectively connected to one end of the first-hundred-eleven resistor R111, one end of the first-hundred-ninety capacitor C191 and pin 4 of the second driving chip U2, the other end of the first-hundred-eleven resistor R111 and the other end of the first-hundred-ninety capacitor C191 are respectively grounded; the ninety-first resistor R91 is used to collect the level signal of the microprocessor, and the one-hundred-eleven resistor R111 and the one-hundred-ninety capacitor C191 are used to filter the level signal to improve the stability of the level signal.

[0035] like Figures 1 to 3 As shown, further, the fourth level detection unit includes a one-hundred-and-one resistor R101, a one-hundred-and-twenty resistor R120 and a one-hundred-and-eighty capacitor C180, one end of the one-hundred-and-one resistor R101 is connected to the microprocessor 5 through the second connector J2, the other end of the one-hundred-and-one resistor R101 is respectively connected to one end of the one-hundred-and-twenty resistor R120, one end of the one-hundred-and-eighty capacitor C180 and the pin 22 of the second driving chip U2, the other end of the one-hundred-and-twenty resistor R120 and the other end of the one-hundred-and-eighty capacitor C180 are respectively grounded; the one-hundred-and-one resistor R101 is used to collect the level signal of the microprocessor 5, and the one-hundred-and-twenty resistor R120 and the one-hundred-and-eighty capacitor C180 are used to filter the level signal to improve the stability of the level signal.

[0036] The present application also provides a PCB board printed with the vehicle audio control circuit as described above.

[0037] The present application also provides a controller that uses the above-mentioned vehicle audio control circuit to perform operation control.

[0038] In summary, after the sound source signal is input into the vehicle audio control circuit, the sound source signal is decoded and processed by the main control unit 1 to obtain an audio decoding signal and a control signal according to the audio signal decoding conversion, and then the audio decoding signal and the control signal are transmitted to the DSP sound effect processing unit 2, and the DSP sound effect processing unit 2 is used to capture the audio data of each segment in the audio decoding signal, and the audio data of each segment is processed and optimized by digital signal processing to improve the sound effect of the sound source signal and suppress noise, and finally the control signal and the processed audio decoding signal are transmitted to the first audio power amplifier unit 3 and the second audio power amplifier unit 4, and the first audio power amplifier unit 3 and the second audio power amplifier unit 4 send a driving signal to the external speaker according to the control signal of the microprocessor 5 and the processed audio decoding signal, and the first audio power amplifier unit 3 and the second audio power amplifier unit 4 are used to drive the three-way speaker or the four-way speaker respectively, so as to realize the driving of the multi-way speaker.

[0039] It is understandable that those skilled in the art can make equivalent substitutions or changes based on the technical solution and utility model concept of the utility model, and all these changes or substitutions should fall within the protection scope of the claims attached to the utility model.

Claims

1. A vehicle audio control circuit, characterized in that: It includes a main control unit, a microprocessor, a DSP sound effect processing unit, a first audio power amplifier unit and a second audio power amplifier unit. The input end of the DSP sound effect processing unit and the input end of the microprocessor are respectively connected to the main control unit, the output end of the DSP sound effect processing unit and the output end of the microprocessor are respectively connected to the input ends of the first audio power amplifier unit and the second audio power amplifier unit, and the output ends of the first audio power amplifier unit and the second audio power amplifier unit are used to drive and control external speakers; the main control unit is used to decode the sound source signal; the DSP sound effect processing unit is used to convert the decoded signal input by the main control unit into an audio signal; the microprocessor is used to control the working states of the first audio power amplifier unit and the second audio power amplifier unit.

2. The vehicle audio control circuit according to claim 1, characterized in that: The first audio power amplification unit includes a first driver chip U1, pin 4 of the first driver chip U1 is connected to the microprocessor through a first level detection unit, pin 22 of the first driver chip U1 is connected to the microprocessor through a second level detection unit, pin 11, pin 12, pin 14 and pin 15 of the first driver chip U1 are respectively connected to the DSP sound processing unit, and pin 3, pin 5, pin 6, pin 7, pin 9, pin 17, pin 19, pin 20, pin 21 and pin 23 of the first driver chip U1 are respectively connected to the first connector J1.

3. The vehicle audio control circuit according to claim 2, characterized in that: The first level detection unit includes a ninth resistor R9, an eleventh resistor R11 and a nineteenth capacitor C19, one end of the ninth resistor R9 is connected to the microprocessor, the other end of the ninth resistor R9 is respectively connected to one end of the eleventh resistor R11, one end of the nineteenth capacitor C19 and pin 4 of the first driving chip U1, and the other end of the eleventh resistor R11 and the other end of the nineteenth capacitor C19 are respectively grounded.

4. The vehicle audio control circuit according to claim 2, characterized in that: The second level detection unit includes a tenth resistor R10, a twelfth resistor R12 and an eighteenth capacitor C18, one end of the tenth resistor R10 is connected to the microprocessor, the other end of the tenth resistor R10 is respectively connected to one end of the twelfth resistor R12, one end of the eighteenth capacitor C18 and a pin 22 of the first driving chip U1, and the other end of the twelfth resistor R12 and the other end of the eighteenth capacitor C18 are grounded respectively.

5. The vehicle audio control circuit according to claim 1, characterized in that: The second audio power amplification unit includes a second driver chip U2, pin 4 of the second driver chip U2 is connected to the microprocessor through a third level detection unit, pin 22 of the second driver chip U2 is connected to the microprocessor through a fourth level detection unit, pins 11, 12, 14 and 15 of the second driver chip U2 are all connected to the DSP sound processing unit through a second connector J2, and pins 3, 5, 6, 7, 9, 17, 19, 20, 21 and 23 of the second driver chip U2 are respectively connected to the third connector J3.

6. The vehicle audio control circuit according to claim 5, characterized in that: The third level detection unit includes a ninety-first resistor R91, a one-hundred-eleven resistor R111 and a one-hundred-ninety capacitor C191, one end of the ninety-first resistor R91 is connected to the microprocessor through the second connector J2, the other end of the ninety-first resistor R91 is respectively connected to one end of the one-hundred-eleven resistor R111, one end of the one-hundred-ninety capacitor C191 and pin 4 of the second driving chip U2, the other end of the one-hundred-eleven resistor R111 and the other end of the one-hundred-ninety capacitor C191 are respectively grounded.

7. The vehicle audio control circuit according to claim 5, characterized in that: The fourth level detection unit includes a one-hundred-and-one resistor R101, a one-hundred-and-twenty resistor R120 and a one-hundred-and-eighty capacitor C180, one end of the one-hundred-and-one resistor R101 is connected to the microprocessor through the second connector J2, the other end of the one-hundred-and-one resistor R101 is respectively connected to one end of the one-hundred-and-twenty resistor R120, one end of the one-hundred-and-eighty capacitor C180 and a pin 22 of the second driving chip U2, the other end of the one-hundred-and-twenty resistor R120 and the other end of the one-hundred-and-eighty capacitor C180 are respectively grounded.

8. A PCB board, characterized in that: The PCB board is printed with the vehicle audio control circuit as described in any one of claims 1-7.

9. A controller, characterized in that: The controller uses the vehicle audio control circuit as described in any one of claims 1-7 to perform operation control.

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