CN105049983A - Wireless loudspeaker box based on WIFI and power amplifier overload protection - Google Patents
Wireless loudspeaker box based on WIFI and power amplifier overload protection Download PDFInfo
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- CN105049983A CN105049983A CN201510417540.4A CN201510417540A CN105049983A CN 105049983 A CN105049983 A CN 105049983A CN 201510417540 A CN201510417540 A CN 201510417540A CN 105049983 A CN105049983 A CN 105049983A
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- power amplifier
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Abstract
The invention discloses a wireless loudspeaker box based on WIFI and power amplifier overload protection. The wireless loudspeaker box comprises a power supply module, a WIFI module, a control module, a storage module, an audio processing module, a power amplifier, a power amplifier overload protection circuit and a loudspeaker; the control module is connected with the power supply module, the WIFI module, the storage module and the audio processing module; the input end of the power amplifier is connected with the output end of the audio processing module; the power amplifier overload protection circuit comprises a current sampling circuit and a feedback circuit, wherein the input end of the current sampling circuit is connected with the loudspeaker; the feedback circuit comprises a comparator, a relay, a feedback resistor and an optical coupler. The wireless loudspeaker box of the invention is simple in structure and convenient for use. When the amplitude of an audio input signal is too large, the output power is limited in a certain range via the feedback, so that the circuit could be protected and the voice could be continuously output, and the user experience is excellent.
Description
Technical field
The present invention relates to audio amplifier field, particularly relate to a kind of wireless sound box based on WIFI and power amplifier overload protection.
Background technology
Audio amplifier is the terminal of whole sound system, and its effect is that audio frequency electric energy is converted to corresponding acoustic energy, and it is radiated space.It is the extremely important part of sound system, the signal of telecommunication is transformed into acoustical signal directly listens to so mission critical because which is responsible for the ear of people, it is wanted directly and the sense of hearing of people is come into contacts with, and the sense of hearing of people is very sensitive, and to the tone color of complex sound, there is very strong resolving ability.Because people's ear to evaluate the most important standard of a sound system tonequality quality just to the subjective feeling of sound, therefore, can think, the performance height of audio amplifier is play key effect to the playing quality of a sound system.
With the development of science and technology, acoustic product gets over miniature portable, and mini audio amplifier arises at the historic moment, for various portable type electronic product provides loudspeaker, the bothering and friend can be allowed to share the effect of sound together of the band earphone that allowed user break away from, and it can be plugged earplug and is used as MP3 and uses.And along with the development of time, the mini audio amplifier form of various brand more and more possesses variation, small and exquisitely attractive in appearancely become the maximum feature of mini audio amplifier.Mini audio amplifier generally all can broadcast song outside plug-in card, also can broadcast listening, and also have some other miscellaneous function, such as throw light on, exhale and help, hearing aid etc., these are a trend of mini function of loudspeaker box development in pluralism.While mini audio amplifier develops, along with the increase of various brand, in succession occurred rambler, do not left without seeing each other, sage is precious, lead tens mini audio amplifier brands such as elegant (DGSHOW), in the near future mini audio amplifier development meeting more flame enrichment, market can go from strength to strength.
Mini audio amplifier needs wired connection, sometimes very inconvenient, and unsightly, in this time, has occurred Baffle Box of Bluetooth on the market.
Baffle Box of Bluetooth refers to embedded with bluetooth chip, connects the stereo set replacing traditional wire rod and connect with bluetooth, by being connected with the bluetooth playback equipment such as mobile phone plane plate computer and notebook, reaches conveniently object.At present, Baffle Box of Bluetooth is based on portable sound box, profile is general comparatively small and exquisite portable, Baffle Box of Bluetooth technology also relies on it to facilitate the feature of human nature paid attention to by consumer gradually and receive, common Baffle Box of Bluetooth mostly is monophony audio amplifier (single speaker unit) on the market, has also emerged in large numbers the sound-channel voice box (two or more speaker unit) of some tonequality excellences simultaneously.
But there are some shortcomings being difficult to overcome in Baffle Box of Bluetooth: transmission range is short, transmission rate is low.
Patent " vehicle-mounted Bluetooth acoustic enclosure " (application number: 201410723213.7 applyings date: 2014-12-02) discloses a kind of vehicle-mounted Bluetooth acoustic enclosure, comprise bluetooth host, data wire and cigar lighter car to fill, bluetooth host is removably connected with clip, clip comprises bend and bottom, bottom is connected with sucker, bluetooth host corner is provided with cylinder, and cylinder is equipped with small sucker.Wherein clip is connected to bluetooth host by removably, is convenient to dismounting cleaning on the one hand, bluetooth host audio amplifier can be taken out car on the other hand and use outward, and stayed by clip use convenient next time in car; Bottom is connected with sucker, shadow shield etc. can gripping object be inconvenient to use time also can be placed in car operating desk or skylight glass etc. from driver more nearby; Bluetooth host surface arranges cylinder, and cylinder is provided with small sucker, can be connected to article in other cars, as ornaments in mobile phone, vehicular air purifier or other cars etc., minimizing takes up room by small sucker.
Can find out, although above-identified patent has the advantage that volume is little, be convenient to cleaning and arrange, the defect that bluetooth is intrinsic can not be broken away from, can only use in narrow space in car.
In addition, existing mini audio amplifier due to power output limited, when its sound output exceeds peak power output itself, generally by directly turning off audio frequency or the form of having the hiccups carries out power overload protection, Consumer's Experience is very bad.
Summary of the invention
Technical problem to be solved by this invention is for defect involved in background technology, provides a kind of wireless sound box based on WIFI and power amplifier overload protection.
The present invention is for solving the problems of the technologies described above by the following technical solutions:
Based on the wireless sound box of WIFI and power amplifier overload protection, comprise power module, WIFI module, control module, memory module, audio processing modules, power amplifier, power amplifier overload protecting circuit and loudspeaker;
Described control module is connected with power module, WIFI module, memory module, audio processing modules respectively;
The input of described power amplifier is connected with the output of audio processing modules;
Described power amplifier overload protecting circuit comprises current sampling circuit and feedback circuit, and wherein, the input of described current sampling circuit is connected with loudspeaker;
Described feedback circuit comprises comparator, relay, feedback resistance and optocoupler;
The inverting input of described comparator is connected with the output of current sampling circuit, in-phase input end connects reference voltage;
One relay termination power supply of described relay coil, the output of another termination comparator; The two ends of relay main contacts connect the output of current sampling circuit and the anode of optocoupler photodiode respectively;
The minus earth of described photodiode;
The output of the first termination current amplification circuit of described feedback resistance, the second end is connected with the output of described power amplifier;
The photo resistance of described optocoupler is in parallel with the second feedback resistance;
Described power module is used for power supply, and described memory module is for storing broadcasting agreement;
Described control module is used for the voice data receiving WIFI module according to the broadcasting agreement in memory module;
The voice data that described audio processing modules receives for decoding;
Described loudspeaker are used for playing audio-fequency data.
As the further prioritization scheme of the wireless sound box that the present invention is based on WIFI and power amplifier overload protection, the processor of described control module adopts ARM series monolithic.
As the further prioritization scheme of the wireless sound box that the present invention is based on WIFI and power amplifier overload protection, the model of described ARM series monolithic is SAA7750.
As the further prioritization scheme of the wireless sound box that the present invention is based on WIFI and power amplifier overload protection, described memory module adopts SDRAM.
As the further prioritization scheme of the wireless sound box that the present invention is based on WIFI and power amplifier overload protection, the model of described memory module is K4S561632.
The present invention adopts above technical scheme compared with prior art, has following technique effect:
1. structure is simple, easy to use;
2. transmission range is long;
3. transmission rate is high;
4. when audio input signal is excessive, by feedback by output power limit within the specific limits, i.e. protective circuit, continue output sound again, user experience is good.
Accompanying drawing explanation
Fig. 1 is module diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail:
As shown in Figure 1, the invention discloses a kind of wireless sound box based on WIFI and power amplifier overload protection, comprise power module, WIFI module, control module, memory module, audio processing modules, power amplifier, power amplifier overload protecting circuit and loudspeaker;
Described control module is connected with power module, WIFI module, memory module, audio processing modules respectively;
The input of described power amplifier is connected with the output of audio processing modules;
Described power amplifier overload protecting circuit comprises current sampling circuit and feedback circuit, and wherein, the input of described current sampling circuit is connected with loudspeaker;
Described feedback circuit comprises comparator, relay, feedback resistance and optocoupler;
The inverting input of described comparator is connected with the output of current sampling circuit, in-phase input end connects reference voltage;
One relay termination power supply of described relay coil, the output of another termination comparator; The two ends of relay main contacts connect the output of current sampling circuit and the anode of optocoupler photodiode respectively;
The minus earth of described photodiode;
The output of the first termination current amplification circuit of described feedback resistance, the second end is connected with the output of described power amplifier;
The photo resistance of described optocoupler is in parallel with the second feedback resistance;
Described power module is used for power supply, and described memory module is for storing broadcasting agreement;
Described control module is used for the voice data receiving WIFI module according to the broadcasting agreement in memory module;
The voice data that described audio processing modules receives for decoding;
Described loudspeaker are used for playing audio-fequency data.
The processor of described control module adopts ARM series monolithic, and model is SAA7750.
Described memory module adopts SDRAM, and model is K4S561632.
Those skilled in the art of the present technique are understandable that, unless otherwise defined, all terms used herein (comprising technical term and scientific terminology) have the meaning identical with the general understanding of the those of ordinary skill in field belonging to the present invention.Should also be understood that those terms defined in such as general dictionary should be understood to have the meaning consistent with the meaning in the context of prior art, unless and define as here, can not explain by idealized or too formal implication.
Above-described embodiment; object of the present invention, technical scheme and beneficial effect are further described; be understood that; the foregoing is only the specific embodiment of the present invention; be not limited to the present invention; within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (5)
1., based on the wireless sound box of WIFI and power amplifier overload protection, it is characterized in that, comprise power module, WIFI module, control module, memory module, audio processing modules, power amplifier, power amplifier overload protecting circuit and loudspeaker;
Described control module is connected with power module, WIFI module, memory module, audio processing modules respectively;
The input of described power amplifier is connected with the output of audio processing modules;
Described power amplifier overload protecting circuit comprises current sampling circuit and feedback circuit, and wherein, the input of described current sampling circuit is connected with loudspeaker;
Described feedback circuit comprises comparator, relay, feedback resistance and optocoupler;
The inverting input of described comparator is connected with the output of current sampling circuit, in-phase input end connects reference voltage;
One relay termination power supply of described relay coil, the output of another termination comparator; The two ends of relay main contacts connect the output of current sampling circuit and the anode of optocoupler photodiode respectively;
The minus earth of described photodiode;
The output of the first termination current amplification circuit of described feedback resistance, the second end is connected with the output of described power amplifier;
The photo resistance of described optocoupler is in parallel with the second feedback resistance;
Described power module is used for power supply, and described memory module is for storing broadcasting agreement;
Described control module is used for the voice data receiving WIFI module according to the broadcasting agreement in memory module;
The voice data that described audio processing modules receives for decoding;
Described loudspeaker are used for playing audio-fequency data.
2. the wireless sound box based on WIFI and power amplifier overload protection according to claim 1, is characterized in that, the processor of described control module adopts ARM series monolithic.
3. the wireless sound box based on WIFI and power amplifier overload protection according to claim 2, it is characterized in that, the model of described ARM series monolithic is SAA7750.
4. the wireless sound box based on WIFI and power amplifier overload protection according to claim 1, is characterized in that, described memory module adopts SDRAM.
5. the wireless sound box based on WIFI and power amplifier overload protection according to claim 4, it is characterized in that, the model of described memory module is K4S561632.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510417540.4A CN105049983A (en) | 2015-07-16 | 2015-07-16 | Wireless loudspeaker box based on WIFI and power amplifier overload protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510417540.4A CN105049983A (en) | 2015-07-16 | 2015-07-16 | Wireless loudspeaker box based on WIFI and power amplifier overload protection |
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| CN105049983A true CN105049983A (en) | 2015-11-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510417540.4A Pending CN105049983A (en) | 2015-07-16 | 2015-07-16 | Wireless loudspeaker box based on WIFI and power amplifier overload protection |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107231588A (en) * | 2017-07-05 | 2017-10-03 | 安徽嘻哈网络技术有限公司 | Car fills wireless blue tooth audio amplifier |
| CN111510803A (en) * | 2020-04-22 | 2020-08-07 | 歌尔科技有限公司 | Sound box and sound box system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101685961A (en) * | 2009-08-03 | 2010-03-31 | 深圳创维－Rgb电子有限公司 | Power supply circuit of audio frequency power amplifier |
| CN204046784U (en) * | 2014-07-30 | 2014-12-24 | 深圳市华美兴泰科技有限公司 | Based on the intelligent wireless audio amplifier that WIFI connects |
| CN204408280U (en) * | 2015-03-04 | 2015-06-17 | 深圳市芯电威科技有限公司 | A kind of audio-frequency power amplifier overload protecting circuit |
-
2015
- 2015-07-16 CN CN201510417540.4A patent/CN105049983A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101685961A (en) * | 2009-08-03 | 2010-03-31 | 深圳创维－Rgb电子有限公司 | Power supply circuit of audio frequency power amplifier |
| CN204046784U (en) * | 2014-07-30 | 2014-12-24 | 深圳市华美兴泰科技有限公司 | Based on the intelligent wireless audio amplifier that WIFI connects |
| CN204408280U (en) * | 2015-03-04 | 2015-06-17 | 深圳市芯电威科技有限公司 | A kind of audio-frequency power amplifier overload protecting circuit |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107231588A (en) * | 2017-07-05 | 2017-10-03 | 安徽嘻哈网络技术有限公司 | Car fills wireless blue tooth audio amplifier |
| CN111510803A (en) * | 2020-04-22 | 2020-08-07 | 歌尔科技有限公司 | Sound box and sound box system |
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