CN111314811A - Harmless repacking vehicle-mounted bluetooth sound - Google Patents

The invention discloses a nondestructive modified (vehicle-mounted) Bluetooth sound with FM transmitting and vehicle-mounted sound synchronous playing functions in the technical field of Bluetooth playing sound equipment, which comprises a main microcontroller MCU, a power supply unit, an FM transmitting/delaying processing unit and the like, wherein the main microcontroller MCU is communicated with a sub-microcontroller MCU through a DSP, the sub-microcontroller MCU controls an FM transmitting chip and a DSP delaying processing chip through an I2C bus, signals processed by the DSP delaying processing chip and a sound effect/volume control unit enter an audio power amplification unit and then sound at a loudspeaker unit, and finally the synchronous sound production of a local machine and the original vehicle-mounted sound is achieved.

Harmless repacking vehicle-mounted bluetooth sound

Technical Field

The invention relates to the technical field of Bluetooth playing sound equipment, in particular to a lossless modified (vehicle-mounted) Bluetooth sound with FM emission and vehicle-mounted sound synchronous playing functions.

Background

Along with the continuous improvement of people's standard of living, the appreciation level to the music promotes by a wide margin, and the requirement to tone quality and sound effect performance is higher and higher, and the performance of the sound effect of the comparatively low end of car self-carrying needs to promote, needs to upgrade in order to satisfy people's demand to the less system of function simultaneously, consequently carries out reasonable upgrading transformation to partial tone quality or function and obtains more and more extensive application.

At present, the upgrading and reconstruction of the existing (vehicle-mounted) sound equipment mainly comprises the following steps:

firstly, lossy reconstruction. The sound quality improvement is obtained by disassembling, replacing, repairing and other means of the original (vehicle-mounted) sound system, including but not limited to: the original (vehicle-mounted) player is replaced to support more playing modes and better obtained decoding support, and functions such as Bluetooth or a U disk, a TF card and the like are added; additionally adding a sound power amplification system unit to obtain larger output power; the loudspeaker system is replaced, and a better high-pitch and low-pitch horn system is adopted to improve the tone quality; the loudspeaker cavity is transformed and sealed to achieve better sound effect, high and low sound performance and the like, the transformed mode has the advantages of obvious effect, and the loudspeaker is basically fixed after the requirement is confirmed to be met.

And secondly, performing simple lossless upgrading and reconstruction on the playing system. For some original (vehicle-mounted) playing systems without the Bluetooth function and only with a cassette tape or a CD playing mode, 1, an AUX wired audio input mode is used, and an input audio source is expanded through an external player. 2. The FM transmitting and switching equipment with the Bluetooth function is used for receiving the Bluetooth audio of the mobile phone and then forwarding the audio to the original FM receiving system of the vehicle to achieve the purpose of nondestructive modification, and the FM transmitting and switching equipment is a common nondestructive modification mode at present.

The existing refitting has the following defects:

one, for the first lossy modification: 1. the method belongs to destructive modification, and inevitably influences the original (vehicle-mounted) circuit or appearance; 2. the replaced playing system needs to be matched with a power amplifier and a loudspeaker system, different brands have different effects, even a high-end brand possibly has the problem of adjustment, meanwhile, the loudspeaker cavity needs to be transformed to be integrally matched, otherwise, if a short board appears, the effect is abandoned, and the effect cannot be expected; 3. the cost is higher, because relate to the upgrading change, need additionally pay out the purchase cost, the former (car machine) system of changing down also causes idle, is not conform to the environmental protection theory to in addition the artifical debugging expense of installation, overall cost is higher.

Secondly, the disadvantages of the simple lossless upgrade and reconstruction of the playing system are as follows: 1. by means of AUX audio input: firstly, the circuit still may be exposed to affect the beauty, and the problems of the placement and power supply of the playing equipment are not solved; secondly, the common ground problem brings large background noise, which seriously affects the hearing; 2. the disadvantage of the way of receiving FM retransmission by bluetooth: although the sound source input of the original (vehicle-mounted) playing system is expanded, the original (vehicle-mounted) playing system can be connected through the mobile phone Bluetooth for playing, and the original functions and circuits are not influenced, the hardware of the original (vehicle-mounted) sound system is not improved, and if the original (vehicle-mounted) sound effect is not ideal, the final sound quality is still limited by the original (vehicle-mounted) sound system.

Disclosure of Invention

The invention aims to provide a lossless modified (vehicle-mounted) Bluetooth sound with FM transmitting and vehicle-mounted sound synchronous playing functions, which is used for improving the sound effect by lossless modification and has the advantages of supplementing the deficiency of the effect of the original (vehicle-mounted) sound by sound hardware on the basis of not changing the original (vehicle-mounted) sound system, utilizing the integrated receiving and forwarding functions of the sound hardware, synchronously working together with the original (vehicle-mounted) sound system, equivalently adding the effects of four loudspeakers to the hardware, and solving the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a harmless repacking vehicle-mounted bluetooth stereo set, includes main microcontroller MCU and power supply unit, main microcontroller MCU is used for receiving and conveying the broadcast control instruction that panel button or infrared remote control sent, power supply unit provides the power for power consumption unit among the harmless repacking vehicle-mounted bluetooth stereo set, microcontroller MCU electricity is connected with audio playback unit, audio frequency volume processing unit, FM transmission/time delay processing unit, audio frequency volume processing unit electricity is connected with audio power amplifier unit, audio power amplifier unit electricity is connected with speaker unit. The main microcontroller MCU is used for receiving a play control instruction sent by a panel key or an infrared remote control, controlling the audio play unit to play a corresponding audio source through an input/output interface, wherein the audio source can be from Bluetooth, a TF card or AUX, an audio signal played by the audio play unit enters the audio/volume processing unit, the main microcontroller MCU controls the audio/volume processing unit through an I2C bus, simultaneously the audio signal enters the FM transmitting/delay processing unit to transmit an FM signal to original vehicle-mounted sound equipment, the main microcontroller MCU communicates with the sub-microcontroller MCU through a DSP, the sub-microcontroller MCU controls the FM transmitting chip and the DSP delay processing chip through an I2C bus, and a signal processed by the DSP delay processing chip and the audio/volume control unit enters the audio power amplifier unit, then the loudspeaker unit sound production reaches local and former vehicle-mounted stereo set synchronous sound production at last, is equivalent to former vehicle-mounted system hardware has increased loudspeaker unit, makes former vehicle-mounted stereo set audio obviously promote.

Preferably, FM transmission/time delay processing unit is including dividing microcontroller MCU, divide microcontroller MCU with main microcontroller MCU electricity is connected, divide microcontroller MCU electricity to be connected with FM transmission chip, DSP time delay processing chip and adjust knob, DSP time delay processing chip electricity is connected with audio/volume control unit.

Preferably, the microcontroller MCU is provided with an infrared receiving unit, a key panel unit, an indicator light unit and a buzzer unit.

Compared with the prior art, the invention has the beneficial effects that: a nondestructive modified vehicle-mounted Bluetooth sound system is characterized in that a play control instruction sent by a panel key or infrared remote control is received by a main microcontroller MCU, the main microcontroller MCU controls an audio play unit to play a corresponding sound source through an input/output interface, an audio signal played by the audio play unit enters an audio/volume processing unit, the main microcontroller MCU controls the audio/volume processing unit through an I2C bus, the audio signal enters an FM emission/delay processing unit to emit an FM signal to original vehicle-mounted sound equipment, the main microcontroller MCU communicates with a sub-microcontroller MCU through a DSP 2C bus, the sub-microcontroller MCU controls an FM emission chip and a DSP delay processing chip through an I2C bus, the signal processed by the DSP delay processing chip and the audio/volume control unit enters an audio power amplification unit, then, the signal is emitted at a loudspeaker unit, and finally the sound system and the original vehicle-mounted sound system synchronously emit sound, the loudspeaker unit has been increased in former on-vehicle system hardware in other words, makes former on-vehicle stereo set audio obviously promote.

According to the invention, the nondestructive modified (vehicle-mounted) Bluetooth sound box with the FM transmitting and vehicle-mounted sound box synchronous playing functions can be placed at any position by a terminal user according to the requirement, and can be used by adjusting the synchronization with the original (vehicle-mounted) sound box system, so that the time cost is saved to a greater extent, meanwhile, the replaced accessories are reduced to be idle, and the practicability is strong.

The invention can be used not only in vehicle, but also in sound system of family and other occasions.

Drawings

Fig. 1 is a working schematic diagram of the lossless refitting vehicle-mounted Bluetooth sound box.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example (b):

referring to fig. 1, the present invention provides a technical solution: a nondestructive modification vehicle-mounted Bluetooth sound comprises a main microcontroller MCU and a power supply unit, wherein the main microcontroller MCU is used for receiving and transmitting a play control instruction sent by a panel key or infrared remote control, the power supply unit is used for providing a power supply for a power utilization unit in the nondestructive modification vehicle-mounted Bluetooth sound, the microcontroller MCU is electrically connected with an audio play unit, an audio/volume processing unit and an FM emission/delay processing unit, the audio/volume processing unit is electrically connected with an audio power amplification unit, and the audio power amplification unit is electrically connected with a loudspeaker unit;

the working process is as follows: the main microcontroller MCU is used for receiving a play control instruction sent by a panel key or an infrared remote control, controlling the audio play unit to play a corresponding audio source through an input/output interface, wherein the audio source can be from Bluetooth, a TF card or AUX, an audio signal played by the audio play unit enters the audio/volume processing unit, the main microcontroller MCU controls the audio/volume processing unit through an I2C bus, simultaneously the audio signal enters the FM transmitting/delay processing unit to transmit an FM signal to original vehicle-mounted sound equipment, the main microcontroller MCU communicates with the sub-microcontroller MCU through a DSP, the sub-microcontroller MCU controls the FM transmitting chip and the DSP delay processing chip through an I2C bus, and a signal processed by the DSP delay processing chip and the audio/volume control unit enters the audio power amplifier unit, then the loudspeaker unit sound production reaches local and former vehicle-mounted stereo set synchronous sound production at last, is equivalent to former vehicle-mounted system hardware has increased loudspeaker unit, makes former vehicle-mounted stereo set audio obviously promote.

The invention can be used not only in vehicle, but also in sound system of family and other occasions.

Particularly, FM transmission/time delay processing unit is including dividing microcontroller MCU, divide microcontroller MCU with main microcontroller MCU electricity is connected, divide microcontroller MCU electricity to be connected with FM transmission chip, DSP time delay processing chip and adjust knob, DSP time delay processing chip electricity is connected with audio/volume control unit.

Specifically, the microcontroller MCU is provided with an infrared receiving unit, a key panel unit, an indicator light unit and a buzzer unit.

The nondestructive modified vehicle-mounted Bluetooth sound is respectively installed on the sound system with the poor and good original (vehicle-mounted) sound effect of the original vehicle-mounted sound, the sound effect of the original (vehicle-mounted) sound is improved to some extent, and the improvement effect is more obvious.

Because the local machine has FM synchronous emission function, the following tests are respectively carried out on a (vehicle-mounted) sound system with poor original sound effect, a (vehicle-mounted) sound system with good original sound effect and a (vehicle-mounted) sound system with modified sound through damage, and the tests are respectively carried out on the conditions that the mute original (vehicle-mounted) sound of the local machine is independently played, the local machine is closed to carry out FM emission independent playing, and the local machine is cooperated with the original (vehicle-mounted) sound to be played together:

the test is carried on the poor car of former on-vehicle sound effect:

the FM transmitting function is turned on by the mute of the machine, which is equivalent to the common FM transmitting product in the market, and the sound effect is equivalent to the original (vehicle-mounted) sound. The special person audits the music box, so that the sound effect is poor;

the FM transmitting function of the machine is turned off, the machine is equivalent to a high-quality Bluetooth sound box, and the machine has good sound effect after being audited by a specially-assigned person;

the broadcast is opened to the local and open FM transmission function and broadcast together in coordination with former (on-vehicle) stereo set, and through the special messenger audition, former (on-vehicle) stereo set is under the replenishment of this product synchronous broadcast, and sound effect is plump, and the third dimension is strong, and the audio promotes obviously.

The test is carried out on a high-grade (vehicle-mounted) sound system which has good vehicle-mounted sound effect and is modified by loss:

the above three tests were also performed, and the audition effect was the same as the above correspondence.

In the description of the present invention, unless otherwise explicitly specified or limited, the term "disposed" is to be understood broadly, and may be, for example, a mechanical connection or an electrical connection; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The standard parts used in the invention can be purchased from the market.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.