CN107785036A - Smart home embedded Bluetooth background music player - Google Patents
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/181—Low-frequency amplifiers, e.g. audio preamplifiers
- H03F3/183—Low-frequency amplifiers, e.g. audio preamplifiers with semiconductor devices only
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- H—ELECTRICITY
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- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers
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- H03G3/3005—Automatic control in amplifiers having semiconductor devices in amplifiers suitable for low-frequencies, e.g. audio amplifiers
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- H—ELECTRICITY
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Abstract
本发明公开了一种智能家居嵌入式蓝牙背景音乐播放器，包括：电源电路、控制电路、功放模块、LCD显示屏和NFC近场感应天线；电源电路分别连接控制电路和功放模块、为控制电路和功放模块供电；控制电路上设有微控制芯片、可编程逻辑器件EEPROM和蓝牙处理模块；微控制芯片控制蓝牙信号的连接处理并驱动LCD显示屏；NFC近场感应天线与微控制芯片电连接；功放模块上设有FM无线接收电路、音频编解码器、音频功率放大器。电源电路上设有耦接电容、将220V市电电源线上的FM信号耦合至FM无线接收电路。本发明能直接从220V市电中获取收音机电台信号，实现蓝牙收音机播放功能。外观设计小巧便于安装操作,具有极好的市场应用前景。
The invention discloses a smart home embedded bluetooth background music player, comprising: a power supply circuit, a control circuit, a power amplifier module, an LCD display screen and an NFC near-field induction antenna; and the power amplifier module; the control circuit is equipped with a micro-control chip, a programmable logic device EEPROM and a Bluetooth processing module; the micro-control chip controls the connection processing of the Bluetooth signal and drives the LCD display; the NFC near-field sensing antenna is electrically connected to the micro-control chip ; The power amplifier module is equipped with an FM wireless receiving circuit, an audio codec, and an audio power amplifier. A coupling capacitor is provided on the power supply circuit to couple the FM signal on the 220V mains power line to the FM wireless receiving circuit. The invention can directly acquire the radio station signal from the 220V commercial power, and realize the bluetooth radio playing function. The appearance design is compact and easy to install and operate, and has excellent market application prospects.
Description
技术领域technical field
本发明涉及电子智能家居技术领域，具体来说涉及一种智能家居嵌入式蓝牙背景音乐播放器。The invention relates to the technical field of electronic smart home, in particular to an embedded bluetooth background music player for smart home.
背景技术Background technique
随着技术的进步，通过物联网技术将家中的各种设备连接到一起，提供家电控制、照明控制以及可编程定时控制等多种功能和手段的智能家居技术已经在今天得到了广泛的应用。家庭背景音乐一种在公共背景音乐的原理基础上结合家庭生活的特点发展而来的新型背景音乐播放器。简单地说，就是通过将MP3、FM、DVD、电脑等多种音源进行播放器组合，令每个房间内都能听到美妙的背景音乐，起到美化空间的装饰作用。现有的家庭背景音乐采用单纯的收音机或MP3/DVD播放器,其与建筑之间联系不紧密.功能也比较单一。且存在这样一些问题：现有的播放器需要通过电源线连接到插座,造成线材暴露在居室内难以真理、混乱不堪；现有的播放器未能整合蓝牙/收音机/外部音频播放器/闹钟功能；收音机天线需要额外外接天线；不存在智能开关、不够智能化。因此，如何设计一种智能家居嵌入式蓝牙背景音乐播放器，以克服上述问题是本领域技术人员需要研究的方向。With the advancement of technology, the smart home technology that connects various devices in the home through the Internet of Things technology and provides multiple functions and means such as home appliance control, lighting control, and programmable timing control has been widely used today. Family background music is a new type of background music player developed on the basis of the principle of public background music combined with the characteristics of family life. Simply put, by combining MP3, FM, DVD, computer and other audio sources with players, every room can hear wonderful background music and play a decorative role in beautifying the space. The existing home background music uses a simple radio or MP3/DVD player, which is not closely related to the building and has a single function. And there are some problems: the existing players need to be connected to the socket through the power cord, causing the wires to be exposed in the living room, making it difficult and confusing; the existing players fail to integrate Bluetooth/radio/external audio player/alarm clock functions ; The radio antenna needs an additional external antenna; there is no smart switch, not smart enough. Therefore, how to design a smart home embedded Bluetooth background music player to overcome the above-mentioned problems is a direction that those skilled in the art need to study.
发明内容Contents of the invention
本发明要解决的技术问题是提供一种智能家居嵌入式蓝牙背景音乐播放器，用以将收音机和蓝牙传输技术整合为一体，解决现有技术需要额外外接天线，智能化程度低的问题。The technical problem to be solved by the present invention is to provide an embedded bluetooth background music player for smart home, which is used to integrate the radio and bluetooth transmission technology, and solve the problem of low intelligence in the prior art that requires an additional external antenna.
其采用的具体技术方案如下：The specific technical solutions it adopts are as follows:
一种智能家居嵌入式蓝牙背景音乐播放器，包括：电源电路、控制电路、功放模块、LCD显示屏和NFC近场感应天线；所述电源电路分别连接控制电路和功放模块、为控制电路和功放模块供电；所述控制电路上集成有微控制芯片、可编程逻辑器件EEPROM和蓝牙处理模块；所述微控制芯片与LCD显示屏、蓝牙处理模块和功放模块电连接，控制蓝牙信号的连接处理并驱动LCD显示屏；所述NFC近场感应天线与微控制芯片电连接；所述功放模块上集成有依次串联的FM无线接收电路、音频编解码器、音频功率放大器。所述电源电路上设有470PF的耦接电容、将220V市电电源线上的FM信号耦合至FM无线接收电路。A smart home embedded bluetooth background music player, comprising: a power supply circuit, a control circuit, a power amplifier module, an LCD display and an NFC near-field induction antenna; Power supply to the module; the control circuit is integrated with a micro-control chip, a programmable logic device EEPROM and a bluetooth processing module; the micro-control chip is electrically connected to the LCD display, the bluetooth processing module and the power amplifier module to control the connection processing of the bluetooth signal and The LCD display is driven; the NFC near-field sensing antenna is electrically connected to the micro-control chip; the power amplifier module is integrated with an FM wireless receiving circuit, an audio codec, and an audio power amplifier connected in series. The power circuit is provided with a 470PF coupling capacitor to couple the FM signal on the 220V mains power line to the FM wireless receiving circuit.
通过采用这种技术方案：以220V市电电源线作为布设于空气中的FM无线电波的天线，FM信号通过电源电路上的耦接电容耦合至FM无线接收电路上，从而能直接从220V市电中获取收音机电台并蓝牙无线传输。将收音机和蓝牙技术整合为一体实现蓝牙收音机播放功能。By adopting this technical scheme: the 220V mains power line is used as the antenna of the FM radio wave in the air, and the FM signal is coupled to the FM wireless receiving circuit through the coupling capacitance on the power supply circuit, so that the FM signal can be directly transmitted from the 220V mains Get radio stations in and transmit them wirelessly via Bluetooth. The radio and bluetooth technology are integrated to realize the bluetooth radio playing function.
优选的是，上述智能家居蓝牙背景音乐播放器中：所述电源电路内包括依序串联的桥堆整流电路、LC滤波电路、开关信号电路、变压器和半波整流二极管。Preferably, in the above smart home Bluetooth background music player: the power supply circuit includes a bridge stack rectifier circuit, an LC filter circuit, a switch signal circuit, a transformer and a half-wave rectifier diode in series.
通过采用这种技术方案：将接入的220V市电电压经桥堆整流电路生成直流电、经LC滤波电路滤波，开关信号电路生成用于开关控制的脉冲信号，该脉冲信号经变压器生成次级低压，经半波整流二极管半波整流，生成整机的打开/关闭的控制信号。By adopting this technical solution: the connected 220V mains voltage is generated by the bridge rectifier circuit to generate direct current, filtered by the LC filter circuit, the switch signal circuit generates a pulse signal for switch control, and the pulse signal is generated by the transformer to generate a secondary low voltage , through the half-wave rectification diode half-wave rectification, to generate the control signal of opening/closing of the whole machine.
更优选的是，上述智能家居蓝牙背景音乐播放器中：所述微控制芯片采用PIC32MX350微控制芯片。More preferably, in the above-mentioned smart home bluetooth background music player: the micro-control chip adopts PIC32MX350 micro-control chip.
更优选的是，上述智能家居蓝牙背景音乐播放器中：所述蓝牙处理模块采用APM8262蓝牙模块。More preferably, in the above smart home Bluetooth background music player: the Bluetooth processing module adopts the APM8262 Bluetooth module.
通过采用这种技术方案：APM8262是一种市场上较为成熟的蓝牙处理芯片产品，用于对蓝牙手机连接播放音乐。By adopting this technical solution: APM8262 is a relatively mature Bluetooth processing chip product on the market, which is used to connect and play music to Bluetooth mobile phones.
进一步优选的是，上述智能家居蓝牙背景音乐播放器中：所述功放模块上集成有依次串联的FM无线接收电路、音频编解码器、音频功率放大器。Further preferably, in the above smart home Bluetooth background music player: the power amplifier module is integrated with an FM wireless receiving circuit, an audio codec, and an audio power amplifier connected in series in sequence.
更进一步优选的是，上述智能家居蓝牙背景音乐播放器中：所述FM无线接收电路采用SI4705FM信号处理电路。It is further preferred that, in the above smart home bluetooth background music player: the FM wireless receiving circuit adopts SI4705FM signal processing circuit.
再进一步优选的是，上述智能家居蓝牙背景音乐播放器中：所述音频编解码器采用TLV320A音频编解码器。Still further preferably, in the above smart home bluetooth background music player: the audio codec adopts TLV320A audio codec.
通过采用这种技术方案：TLV320A音频编解码器具有高、低音控制功能和高响度控制功能，同时具有二路立体声输入端口且其增益可由微控器控制。还具有四路独立的功放激励端口，可由微控器控制其输出、平衡度和静音关闭等功能，其音量也可由微控器控制，最小步进量为1.25 dB。By adopting this technical solution: TLV320A audio codec has high and low frequency control functions and high loudness control functions, and has two stereo input ports and its gain can be controlled by a microcontroller. It also has four independent power amplifier excitation ports, which can be controlled by the microcontroller to control its output, balance and mute off functions, and its volume can also be controlled by the microcontroller, with a minimum step of 1.25 dB.
再进一步优选的是，上述智能家居蓝牙背景音乐播放器中：所述音频功率放大器采用TPA2012音频放大器。Still further preferably, in the above-mentioned smart home bluetooth background music player: the audio power amplifier adopts TPA2012 audio amplifier.
通过采用这种技术方案：TPA2012音频放大器作为一种AB类音频功率放大器，其具有高输出功率能力，低失真低输出噪声，静音功能，低外部元件数，内部增益固定，无需外部补偿，无启动电容器的特点。By adopting this technical solution: TPA2012 audio amplifier as a class AB audio power amplifier, which has high output power capability, low distortion and low output noise, mute function, low external component count, fixed internal gain, no external compensation, no start-up characteristics of capacitors.
与现有技术相比，本发明能直接从220V市电中获取收音机电台信号，将收音机和蓝牙技术整合为一体实现蓝牙收音机播放功能。外观设计小巧便于安装操作,具有极好的市场应用前景。Compared with the prior art, the invention can directly obtain the radio station signal from the 220V commercial power, and integrates the radio and the bluetooth technology to realize the play function of the bluetooth radio. The appearance design is compact and easy to install and operate, and has excellent market application prospects.
附图说明Description of drawings
下面结合附图与具体实施方式对本发明作进一步详细的说明：Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:
图1为本发明实施例1中结构示意图；Fig. 1 is a structural schematic diagram in Embodiment 1 of the present invention;
图2为图1中电源电路的电路示意图；Fig. 2 is the circuit schematic diagram of power supply circuit in Fig. 1;
图3为图1中功放模块的电路示意图；FIG. 3 is a schematic circuit diagram of the power amplifier module in FIG. 1;
图4为图1中控制电路的电路示意图。FIG. 4 is a schematic circuit diagram of the control circuit in FIG. 1 .
因附图较大，论述中部分元器件标记在附图中省略，以实施例部分文字说明为主。Due to the large size of the attached drawings, part of the component labels in the discussion are omitted in the attached drawings, and the textual descriptions of the embodiments are the main part.
各附图标记与部件名称对应关系如下：The corresponding relationship between each reference sign and the part name is as follows:
1、电源电路；2、控制电路；3、功放模块；4、LCD显示屏；5、NFC近场感应天线；21、微控制芯片；22、可编程逻辑器件EEPROM；23、蓝牙处理模块；31、FM无线接收电路；32、音频编解码器；33、音频功率放大器。1. Power supply circuit; 2. Control circuit; 3. Power amplifier module; 4. LCD display; 5. NFC near-field sensing antenna; 21. Micro-control chip; 22. Programmable logic device EEPROM; 23. Bluetooth processing module; 31 , FM wireless receiving circuit; 32, audio codec; 33, audio power amplifier.
具体实施方式Detailed ways
为了更清楚地说明本发明的技术方案，下面将结合附图对本发明作进一步描述。In order to illustrate the technical solution of the present invention more clearly, the present invention will be further described below in conjunction with the accompanying drawings.
如图1所示本发明的实施例1：Embodiment 1 of the present invention as shown in Figure 1:
一种智能家居嵌入式蓝牙背景音乐播放器，包括：电源电路1、控制电路2、功放模块3、LCD显示屏4和NFC近场感应天线5；所述电源电路1分别连接控制电路2和功放模块3、为控制电路2和功放模块3供电；所述控制电路2上集成有微控制芯片21、可编程逻辑器件EEPROM22和蓝牙处理模块23；所述微控制芯片21与LCD显示屏4、蓝牙处理模块23和功放模块3电连接，控制蓝牙信号的连接处理并驱动LCD显示屏4；所述NFC近场感应天线5与微控制芯片21电连接；所述功放模块3上集成有依次串联的FM无线接收电路31、音频编解码器32、音频功率放大器33；所述电源电路1上设有470PF的耦接电容、将220V市电电源线上的FM信号耦合至FM无线接收电路31。A smart home embedded Bluetooth background music player, comprising: a power supply circuit 1, a control circuit 2, a power amplifier module 3, an LCD display 4 and an NFC near-field sensing antenna 5; the power supply circuit 1 is connected to the control circuit 2 and the power amplifier respectively Module 3, supplying power for the control circuit 2 and the power amplifier module 3; the control circuit 2 is integrated with a micro-control chip 21, a programmable logic device EEPROM22 and a Bluetooth processing module 23; the micro-control chip 21 is connected with the LCD display screen 4, Bluetooth The processing module 23 is electrically connected with the power amplifier module 3, controls the connection processing of the Bluetooth signal and drives the LCD display screen 4; the NFC near-field sensing antenna 5 is electrically connected with the micro-control chip 21; FM wireless receiving circuit 31, audio codec 32, audio power amplifier 33; said power supply circuit 1 is provided with a coupling capacitor of 470PF to couple the FM signal on the 220V mains power line to the FM wireless receiving circuit 31.
如图2所示为电源电路1的电路结构示意图：Figure 2 is a schematic diagram of the circuit structure of the power supply circuit 1:
外部电源的220V市电从连接插座处接入，经保险丝到达桥堆整流电路。经桥堆整流为400V电压。并通过以4.7uF 的电容和1mH的电感构成的π型滤波网络进行滤波。开关电源管理芯片采用LNK6663，LNK6663通过反馈电路产生脉冲信号。变压器将该脉冲信号通过电磁感应在次级生成低压交流信号。该低压交流信号经二极管D104半波整流。通过RC滤波电路将整流后的纹波滤除。通过把智能控制开关信号转为1.2V光耦IC100控制信号，用来控制光耦IC100通断，生成对整机的打开/关闭控制信号。470pF的耦接电容C114直接连接在220V市电电源线220V上，以220V市电电源线作为布设于空气中的FM无线电波的天线，FM信号通过电源电路上的耦接电容耦合至FM无线接收电路上。The 220V commercial power of the external power supply is connected from the connection socket, and reaches the bridge rectifier circuit through the fuse. It is rectified by bridge stack to 400V voltage. And it is filtered through a π-type filter network composed of a 4.7uF capacitor and a 1mH inductance. Switching power supply management chip adopts LNK6663, and LNK6663 generates pulse signal through feedback circuit. The transformer generates a low-voltage AC signal on the secondary side of the pulse signal through electromagnetic induction. The low-voltage AC signal is half-wave rectified by diode D104. The rectified ripple is filtered by an RC filter circuit. By converting the intelligent control switch signal into a 1.2V optocoupler IC100 control signal, it is used to control the on/off of the optocoupler IC100 to generate an on/off control signal for the whole machine. The 470pF coupling capacitor C114 is directly connected to the 220V mains power line 220V, and the 220V mains power line is used as the antenna of the FM radio wave in the air. The FM signal is coupled to the FM wireless receiver through the coupling capacitance on the power circuit. on the circuit.
如图3所示为功放模块3的电路示意图：As shown in Figure 3, it is a schematic circuit diagram of the power amplifier module 3:
5V直流电源经纹波滤波处理，在AP7331-33 LDO线性管稳压为3.3V电压。AP7331-18为1.8V LDO线性稳压管，它为TLV320A音频编解码器32提供1.8V供电。TLV320A音频编解码器32的工作时钟为HSO321S提供的12MHz。TLV320A音频编解码器32输出双通道音频信号，连接到TPA2012音频功率放大器33。以74LVC1G157做蓝牙音频/FM收音机音频切换电路。SI4705FM信号处理电路上以CDS3C16GTH为防止外部高压保护电路，通过带通滤波电路滤除87-110Mhz以外的信号。同样内置天线电路从220V市电电源线提取的FM信号，经过带通滤波器进入音频放大器TPA2012为功率放大芯片，输出BTL高保真音频。The 5V DC power supply is processed by ripple filtering, and the voltage is regulated to 3.3V by the AP7331-33 LDO linear tube. AP7331-18 is a 1.8V LDO linear voltage regulator tube, which provides 1.8V power supply for TLV320A audio codec 32 . The working clock of TLV320A audio codec 32 is 12MHz provided by HSO321S. TLV320A audio codec 32 outputs two-channel audio signal, which is connected to TPA2012 audio power amplifier 33 . Use 74LVC1G157 as Bluetooth audio/FM radio audio switching circuit. The SI4705FM signal processing circuit uses CDS3C16GTH as an external high-voltage protection circuit, and filters out signals other than 87-110Mhz through a band-pass filter circuit. Also, the built-in antenna circuit extracts the FM signal from the 220V mains power line, and enters the audio amplifier TPA2012 as a power amplifier chip through a band-pass filter to output BTL high-fidelity audio.
如图4所示为控制电路2的电路示意图：As shown in Figure 4, it is a schematic circuit diagram of the control circuit 2:
以PIC32MX350微控制芯片21做按键处理工作、对LCD显示屏4的插座输出驱动信号。24LC16设计为做用户操作习惯的保存记忆用，它用于保存最近设置的音量，电台，当前工作模式。SST25VF032为引导IC，它用于保存启动的内容。74LVC1G125用于切换蓝牙音频信号。APM8262是蓝牙处理芯片23，它主要用来做蓝牙手机连接播放音乐用。RF430CL为NFC管理芯片。The PIC32MX350 micro-control chip 21 is used for key processing, and the drive signal is output to the socket of the LCD display screen 4 . 24LC16 is designed to save the user's operating habits. It is used to save the volume, radio station, and current working mode set recently. SST25VF032 is a boot IC, which is used to save the boot content. 74LVC1G125 is used to switch Bluetooth audio signal. APM8262 is a bluetooth processing chip 23, which is mainly used for playing music by connecting a bluetooth mobile phone. RF430CL is an NFC management chip.
以上所述，仅为本发明的具体实施例，但本发明的保护范围并不局限于此，任何熟悉本领域技术的技术人员在本发明公开的技术范围内，可轻易想到的变化或替换，都应涵盖在本发明的保护范围之内。本发明的保护范围以权利要求书的保护范围为准。The above is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any skilled person familiar with the art can easily think of changes or substitutions within the technical scope disclosed in the present invention. All should be covered within the protection scope of the present invention. The protection scope of the present invention shall be determined by the protection scope of the claims.
Claims (7)
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Application publication date: 20180309 |