CN104869518A - Wall-mounted loud-speaking talkback terminal and loud-speaking talkback system - Google Patents
Wall-mounted loud-speaking talkback terminal and loud-speaking talkback system Download PDFInfo
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- CN104869518A CN104869518A CN201510306137.4A CN201510306137A CN104869518A CN 104869518 A CN104869518 A CN 104869518A CN 201510306137 A CN201510306137 A CN 201510306137A CN 104869518 A CN104869518 A CN 104869518A
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Abstract
The embodiment of the invention provides a wall-mounted loud-speaking talkback terminal and a loud-speaking talkback system. A hardware circuit board of the wall-mounted loud-speaking talkback terminal comprises a power supply board, an audio signal processing power amplifying board and a digital board, wherein the power supply board comprises two paths of isolated power supplies; the audio signal processing power amplifying board is connected with the power supply board through two paths of power supply input/output interfaces; and the digital board is used for supplying power to the audio signal power processing amplifying board through connection with the other path of power supply input/output interface on the audio signal processing power amplifying board, and is connected with the audio signal processing amplifying board through the audio signal input/output interface and a control configuration interface. According to the wall-mounted loud-speaking talkback terminal provided by the embodiment of the invention, power supply-ground partition is performed on each path of audio signal, so that mutual interference among different paths of sound sources and power supply-ground superposition can be reduced, and the signal to noise ratios of the audio signals are effectively increased.
Description
Technical field
The embodiment of the present invention relates to the intercommunication technology that amplifies, and particularly relates to a kind of wall-hanging intercommunication terminal and sound-amplification intercommunication system of amplifying.
Background technology
Speech talkback is one of function of indispensability in enterprise's safety-protection system, along with updating of technology, speech talkback also plays a part more and more important in whole safety-protection system, is widely used in the workplace that education, electric power, bank, chemical industry, metallurgy, harbour etc. need amplifying call intercom.
And the wall-hanging intercommunication terminal that amplifies is one the most frequently used in educational system amplifies intercommunication terminal equipment (application such as in listening), usually possesses network, this locality, ANTENN AUDIO etc. and amplify and network talkback function.Mainly there is following problem in the wall-hanging intercommunication terminal that amplifies at present:
(1) usually card sound, staccato phenomenon can be there is because of network quality difference or when playing high bit rate song when network audio is play;
(2) when local audio, network audio and ANTENN AUDIO audio mixing, power amplifier exports the end and makes an uproar excessive, causes audio mixing of poor quality;
(3) Wireless amplification signal to noise ratio is low and easily occur phenomenon of uttering long and high-pitched sounds;
(4) during network talkback owing to there is echo phenomenon in network delay, encoding and decoding time delay.
Summary of the invention
For above-mentioned deficiency, the embodiment of the present invention provides a kind of wall-hanging intercommunication terminal and sound-amplification intercommunication system of amplifying, by carrying out power supply and Ground Split to each road audio signal, realize, to the weakening that each road source of sound disturbs mutually and power supply superposes with Earth noise, effectively to improve signal to noise ratio.
First aspect, the embodiment of the present invention provides a kind of wall-hanging intercommunication terminal that amplifies, and its hardware circuit board comprises: power panel, Audio Signal Processing power board and digiboard, wherein:
Described power panel arranges two-way insulating power supply, is respectively used to power to described Audio Signal Processing power board and digiboard;
Described Audio Signal Processing power board is connected with described power panel by two-way power supply input/output interface, for receiving external audio signal and carrying out amplification filtration treatment to it, in described two-way power supply, a road is used for powering to described Audio Signal Processing power board;
Described digiboard connects described Audio Signal Processing power board by input/output interface, by another road power supply on Audio Signal Processing power board, it is powered, and be connected with described Audio Signal Processing power board by audio signal input/output interface and control configuration interface, process and control the Audio Signal Processing mode of described Audio Signal Processing power board for carrying out decoding to the audio signal of described Audio Signal Processing power board input.
On the basis of technique scheme, further, described Audio Signal Processing power board comprises:
First power module, with on described power panel wherein a road power supply be connected, for directly powering to described Audio Signal Processing power board;
Second source module, for powering to described digiboard by docking with the power module on described digiboard;
External audio signal receiver, for receiving external audio signal;
Audio signal amplification/filter, is connected with described voice-frequency signal receiver, for audio signal being carried out amplifying/filtering;
Channel switching module, amplify with described audio signal/filter is connected, and the control signal for sending according to described digiboard realizes selecting single channel or multipath audio signal to export;
Power amplifier module, is connected with described channel switching module, for carrying out power amplification to the audio signal of input;
The outside output interface of audio signal, is connected with described power amplifier module, for the audio signal after output processing;
Control configuration interface, for receiving the configuration control command signal that described digiboard sends;
Audio signal input/output interface, for carry out audio signal mutual with described digiboard.
On the basis of technique scheme, further, described digiboard comprises:
Power Entry Module, with the second source model calling of described Audio Signal Processing power board, for powering to described digiboard;
Microcontroller, for processing audio frequency and control signal;
Audio signal decoding chip, is connected with described microcontroller, for carrying out decoding process to audio signal;
Network communication module, is connected with described microcontroller, for receiving the configuration control command signal that external network sends;
Color screen panel interface, is connected with described microcontroller, for receiving the configuration control command signal of external touch screen induction;
Control configuration interface, be connected with described microcontroller, for sending the configuration control command signal of automatic network communication module or color screen panel interface to described Audio Signal Processing power board;
Audio signal input/output interface, is connected with described microcontroller by described audio signal decoding core, for carry out audio signal mutual with described Audio Signal Processing power board.
On the basis of technique scheme, further, described Audio Signal Processing power board also comprises:
Rectification amplifier, amplify with described audio signal/filter is connected, for the audio signal of audio signal amplification/filter process is carried out rectification amplification, be then sent to described digiboard by described audio signal input/output interface and detect to determine whether carry out passage bridge to audio signal to make described microcontroller.
On the basis of technique scheme, further, described Audio Signal Processing power board also comprises:
Backup audio input channel interface, is connected with described channel switching module, if when inputting for no audio signal, then described channel switching module switches to described backup audio input channel to access backup audio signal.
On the basis of technique scheme, further, in described digiboard, microcontroller also comprises network remote upgrade function module, for the maintenance to the described wall-hanging intercommunication terminal that amplifies, upgrading and optimization.
On the basis of technique scheme, further, described digiboard also comprises:
Reset key interface, is connected with described microcontroller, for the hardware initialization state that resets;
Power supply indicator, is connected with described Power Entry Module, is used to indicate the operating state of described digiboard;
USB interface, is connected with described microcontroller, for circumscribed USB equipment;
SD card interface, is connected with described microcontroller, for accessing SD card.
On the basis of technique scheme, further, audio signal amplification/filter is used for the network audio signal of local audio signal, digiboard and blue teeth wireless audio signal to carry out amplifying/filtering.
Second aspect, the embodiment of the present invention also provides a kind of sound-amplification intercommunication system, and it adopts and comprises the above-mentioned wall-hanging intercommunication terminal that amplifies described arbitrarily.
The wall-hanging intercommunication terminal that amplifies that the embodiment of the present invention provides, by carrying out power supply and Ground Split to each road audio signal, realization reduction each road source of sound mutually disturbs and power supply superposes with Earth noise, effectively can improve signal to noise ratio.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
The hardware circuit board structural representation of the wall-hanging intercommunication terminal embodiment one that amplifies that Fig. 1 provides for the embodiment of the present invention;
The hardware circuit board structural representation of the wall-hanging intercommunication terminal embodiment two that amplifies that Fig. 2 provides for the embodiment of the present invention;
The hardware circuit board structural representation of the wall-hanging intercommunication terminal embodiment three that amplifies that Fig. 3 provides for the embodiment of the present invention;
The hardware circuit board structural representation of the wall-hanging intercommunication terminal embodiment four that amplifies that Fig. 4 provides for the embodiment of the present invention;
The hardware circuit board structural representation of the wall-hanging intercommunication terminal embodiment five that amplifies that Fig. 5 provides for the embodiment of the present invention.
Embodiment
For making the object of the embodiment of the present invention, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Embodiment one
The hardware circuit board structural representation of the wall-hanging intercommunication terminal embodiment one that amplifies that Fig. 1 provides for the embodiment of the present invention, as shown in Figure 1, its hardware circuit board of this terminal comprises: power panel 10, Audio Signal Processing power board 20 and digiboard 30, wherein:
Described power panel 10 comprises two-way insulating power supply, is respectively used to power to described Audio Signal Processing power board 20 and digiboard 30;
Described Audio Signal Processing power board 20 is connected with described power panel 10 with 200 by two-way power supply input/output interface 100, for receiving external audio signal and carrying out amplification filtration treatment to it, in described two-way power supply, a road 100 is for powering to described Audio Signal Processing power board;
Described digiboard connects described Audio Signal Processing power board by power supply input/output interface 200 ', by another road power supply on Audio Signal Processing power board, it is powered, and be connected with described Audio Signal Processing power board by audio signal input/output interface 300 and control configuration interface 400, the audio signal for inputting described Audio Signal Processing power board 20 is carried out decoding and is processed and control the Audio Signal Processing mode of described Audio Signal Processing power board 20.
In technique scheme, amplify intercommunication terminal wall-hanging relative to existing wall hanging, by Audio Signal Processing power board and digiboard are carried out power supply segmentation, realization reduction each road source of sound mutually disturbs and power supply superposes with Earth noise, effectively can improve signal to noise ratio.Further, power panel is passed through Audio Signal Processing power board indirectly to the power supply of digiboard, can simplify the annexation of module, only Audio Signal Processing power board need be connected with power panel, Audio Signal Processing power board is connected with digiboard.Simple annexation effectively can improve the integrated wires design to hardware circuit.
Embodiment two
The hardware circuit board structural representation of the wall-hanging intercommunication terminal embodiment two that amplifies that Fig. 2 provides for the embodiment of the present invention, embodiment two, on the basis of embodiment one, further provides the detailed construction of each circuit board, as shown in Figure 2:
Described Audio Signal Processing power board 20 comprises:
First power module 21, with on described power panel wherein a road power supply 100 be connected, for directly powering to described Audio Signal Processing power board;
Second source module 22, for powering to described digiboard by docking with the power module on described digiboard;
External audio signal receiver 23, for receiving external audio signal;
Audio signal amplification/filter 24, be connected with described voice-frequency signal receiver 23, for audio signal is carried out amplifying/filtering, particularly, described audio signal amplification/filter 24, for being undertaken amplifying/filtering by the network audio signal of local audio signal, digiboard and blue teeth wireless audio signal.
Channel switching module 25, amplify with described audio signal/filter 24 is connected, and the control signal for sending according to described digiboard realizes selecting single channel or multipath audio signal to export; Can realize adaptive amplifying and intercommunication selection by the use of channel switching module 25, the switching of employing multiple sound resource intelligence not only can realize single channel or multichannel source of sound exports and signal to noise ratio compares common wall hanging terminal raising more than 10dB.
Power amplifier module 26, is connected with described channel switching module 25, for carrying out power amplification to the audio signal of input;
The outside output interface 27 of audio signal, is connected with described power amplifier module 26, for the audio signal after output processing;
Control configuration interface 29, for receiving the configuration control command signal that described digiboard sends;
Audio signal input/output interface 28, for carry out audio signal mutual with described digiboard.
Described digiboard 30 comprises:
Power Entry Module 31, is connected with the second source module 22 of described Audio Signal Processing power board, for powering to described digiboard;
Microcontroller 32, for processing audio frequency and control signal;
Audio signal decoding chip 33, is connected with described microcontroller 32, for carrying out decoding process to audio signal;
Network communication module 34, is connected with described microcontroller 32, for receiving the configuration control command signal that external network sends.Further, network communication module 34 can comprise wireless blue tooth communication module, WiFi wireless communication module, ZigBee wireless communication module or Ethernet RJ45 network receiver;
Color screen panel interface 35, is connected with described microcontroller 32, for receiving the configuration control command signal of external touch screen induction;
Control configuration interface 37, be connected with described microcontroller 32, for sending the configuration control command signal of automatic network communication module or color screen panel interface to described Audio Signal Processing power board;
Audio signal input/output interface 36, is connected with described microcontroller 32 by described audio signal decoding chip 33, for carry out audio signal mutual with described Audio Signal Processing power board.
In embodiment shown in Fig. 2, power panel can adopt AC-DC Switching Power Supply scheme, input 85V---265AC, export 12VDC/3A, 24VDC/1A two-way insulating power supply, be respectively digiboard, Audio Signal Processing power board is powered, solve the mutual interference that digiboard and audio board are brought because of common impedance on power line.
Audio Signal Processing power board, the input signal of decoding to Line_in, bluetooth _ in, network audio amplifies, passage bridge stereo process, and carries out power amplification, is fixed-resistance output signal etc. to level pressure input signal conditioning.Carry out an amplification filtering process in each road audio frequency input prime, by the input range that each road signal condition requires to power amplifier, and the noise signal of non-audio is filtered.Passage bridge can be used for realizing SCVF single channel voice frequency signal and export (local or wireless blue tooth or network) or audio mixing exports, and configures output channel by server software.Audio mixing output noise be by each road signal ground is split reduce each road signal as far as possible reduce the noise that audio mixing brings publicly.Power amplifier chips adopts switching frequency up to the D type digital power amplifier of 1.2MHZ, and its efficiency is up to more than 90%, and signal to noise ratio is up to 100DB.
In digiboard, microprocessor can adopt LPC1768FBD100, and major function can comprise network service, audio coding decoding, Audio Signal Processing and power board control, the control of color screen panel etc.Further, in described digiboard, microcontroller can also comprise network remote upgrade function module, for the maintenance to the described wall-hanging intercommunication terminal that amplifies, upgrading and optimization.Such as utilize the ISP function of LPC1768FBD100 can realize network upgrade function.And can real time monitoring network quality, if network quality is poor, song is compressed to server by digiboard by transmission order, and digiboard also will increase buffer time and spatial cache, thus realizes smooth playing and avoid card sound, staccato to exist.In order to avoid intercommunication to produce echo further, coding chip have employed the VS1053 of inner band DSP, eliminates echo by DSP algorithm.
Embodiment three
The hardware circuit board structural representation of the wall-hanging intercommunication terminal embodiment one that amplifies that Fig. 3 provides for the embodiment of the present invention, embodiment three is on the basis of embodiment two, described Audio Signal Processing power board adds rectification amplifier, specifically as shown in Figure 3, described Audio Signal Processing power board 20 also comprises:
Rectification amplifier 240, amplify with described audio signal/filter 24 is connected, audio signal for being processed by audio signal amplification/filter 24 carries out rectification amplification, is then sent to described digiboard 30 by described audio signal input/output interface 28 and determines whether carry out passage bridge to make described microcontroller 32 pairs of audio signals detect.Whether such as local and Bluetooth signal is after amplification filtering, also carry out rectification to it simultaneously and amplify and give microprocessor and detect and have this locality and Bluetooth signal input to realize intelligence switching giving channel switching module (analog switch).Passage bridge can be used for realizing SCVF single channel voice frequency signal and export (local or wireless blue tooth or network) or audio mixing exports, and configures output channel by server software.Audio mixing output noise be by each road signal ground is split reduce each road signal as far as possible reduce the noise that audio mixing brings publicly.
Embodiment four
The hardware circuit board structural representation of the wall-hanging intercommunication terminal embodiment four that amplifies that Fig. 4 provides for the embodiment of the present invention, embodiment three is on the basis of embodiment two, described Audio Signal Processing power board increases backup audio input channel interface, specifically as shown in Figure 4, also comprises:
Backup audio input channel interface 250, is connected with described channel switching module 25, if when inputting for no audio signal, then described channel switching module 25 switches to described backup audio input channel to access backup audio signal.If terminal being powered down or network disconnect and do not have wireless blue tooth and local signal input time, voice-grade channel is switched to backup audio input, or under server command, be initiatively switched to backup audio input channel, can solve in college entrance examination broadcasting English Listening Comprehension and similar applications and occur because power-off and various uncertain situation cause playing situation.
Embodiment five
The hardware circuit board structural representation of the wall-hanging intercommunication terminal embodiment five that amplifies that Fig. 5 provides for the embodiment of the present invention, embodiment five adds some Peripheral Interfaces at digiboard, and as shown in Figure 5, described digiboard also comprises:
Reset key interface 36, is connected with described microcontroller 32, for the hardware initialization state that resets;
Power supply indicator 37, is connected with described Power Entry Module 31, is used to indicate the operating state of described digiboard;
USB interface 38, is connected with described microcontroller 32, for circumscribed USB equipment;
SD card interface 39, is connected with described microcontroller 32, for accessing SD card.
Embodiment five-way crosses increase external apparatus interface and indicator light, is more conducive to wall-hanging intercommunication terminal plant maintenance, configuration and the updating operation of amplifying.
The embodiment of the present invention also provides a kind of sound-amplification intercommunication system, and it adopts and comprises the above-mentioned wall-hanging intercommunication terminal that amplifies described arbitrarily, and technique effect is similar to the above embodiments, does not repeat them here.
Last it is noted that above each embodiment is only in order to illustrate technical scheme of the present invention, be not intended to limit; Although with reference to foregoing embodiments to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein some or all of technical characteristic; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technical scheme.
Claims (9)
1. the wall-hanging intercommunication terminal that amplifies, its hardware circuit board comprises power panel, Audio Signal Processing power board and digiboard, it is characterized in that:
Described power panel arranges two-way insulating power supply, is respectively used to power to described Audio Signal Processing power board and digiboard;
Described Audio Signal Processing power board is connected with described power panel by two-way power supply input/output interface, for receiving external audio signal and carrying out amplification filtration treatment to it, in described two-way power supply, a road is used for powering to described Audio Signal Processing power board;
Described digiboard connects described Audio Signal Processing power board by input/output interface, by another road power supply on Audio Signal Processing power board, it is powered, and be connected with described Audio Signal Processing power board by audio signal input/output interface and control configuration interface, process and control the Audio Signal Processing mode of described Audio Signal Processing power board for carrying out decoding to the audio signal of described Audio Signal Processing power board input.
2. the wall-hanging intercommunication terminal that amplifies according to claim 1, is characterized in that, described Audio Signal Processing power board comprises:
First power module, with on described power panel wherein a road power supply be connected, for directly powering to described Audio Signal Processing power board;
Second source module, for powering to described digiboard by docking with the power module on described digiboard;
External audio signal receiver, for receiving external audio signal;
Audio signal amplification/filter, is connected with described voice-frequency signal receiver, for audio signal being carried out amplifying/filtering;
Channel switching module, amplify with described audio signal/filter is connected, and the control signal for sending according to described digiboard realizes selecting single channel or multipath audio signal to export;
Power amplifier module, is connected with described channel switching module, for carrying out power amplification to the audio signal of input;
The outside output interface of audio signal, is connected with described power amplifier module, for the audio signal after output processing;
Control configuration interface, for receiving the configuration control command signal that described digiboard sends;
Audio signal input/output interface, for carry out audio signal mutual with described digiboard.
3. the wall-hanging intercommunication terminal that amplifies according to claim 2, it is characterized in that, described digiboard comprises:
Power Entry Module, with the second source model calling of described Audio Signal Processing power board, for powering to described digiboard;
Microcontroller, for processing audio frequency and control signal;
Audio signal decoding chip, is connected with described microcontroller, for carrying out decoding process to audio signal;
Network communication module, is connected with described microcontroller, for receiving the configuration control command signal that external network sends;
Color screen panel interface, is connected with described microcontroller, for receiving the configuration control command signal of external touch screen induction;
Control configuration interface, be connected with described microcontroller, for sending the configuration control command signal of automatic network communication module or color screen panel interface to described Audio Signal Processing power board;
Audio signal input/output interface, is connected with described microcontroller by described audio signal decoding core, for carry out audio signal mutual with described Audio Signal Processing power board.
4. the wall-hanging intercommunication terminal that amplifies according to claim 2, is characterized in that, described Audio Signal Processing power board also comprises:
Rectification amplifier, amplify with described audio signal/filter is connected, for the audio signal of audio signal amplification/filter process is carried out rectification amplification, be then sent to described digiboard by described audio signal input/output interface and detect to determine whether carry out passage bridge to audio signal to make described microcontroller.
5. the wall-hanging intercommunication terminal that amplifies according to claim 2, is characterized in that, described Audio Signal Processing power board also comprises:
Backup audio input channel interface, is connected with described channel switching module, if when inputting for no audio signal, then described channel switching module switches to described backup audio input channel to access backup audio signal.
6. the wall-hanging intercommunication terminal that amplifies according to claim 3, is characterized in that, in described digiboard, microcontroller also comprises network remote upgrade function module, for the maintenance to the described wall-hanging intercommunication terminal that amplifies, upgrading and optimization.
7. the wall-hanging intercommunication terminal that amplifies according to claim 3, it is characterized in that, described digiboard also comprises:
Reset key interface, is connected with described microcontroller, for the hardware initialization state that resets;
Power supply indicator, is connected with described Power Entry Module, is used to indicate the operating state of described digiboard;
USB interface, is connected with described microcontroller, for circumscribed USB equipment;
SD card interface, is connected with described microcontroller, for accessing SD card.
8. the wall-hanging intercommunication terminal that amplifies according to claim 2, is characterized in that, audio signal amplification/filter is used for the network audio signal of local audio signal, digiboard and blue teeth wireless audio signal to carry out amplifying/filtering.
9. a sound-amplification intercommunication system, is characterized in that, described sound-amplification intercommunication system adopts the wall-hanging intercommunication terminal that amplifies comprised as described in any one of claim 1 ~ 8.
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| CN201510306137.4A CN104869518A (en) | 2015-06-04 | 2015-06-04 | Wall-mounted loud-speaking talkback terminal and loud-speaking talkback system |
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| CN201510306137.4A CN104869518A (en) | 2015-06-04 | 2015-06-04 | Wall-mounted loud-speaking talkback terminal and loud-speaking talkback system |
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| CN201510306137.4A Pending CN104869518A (en) | 2015-06-04 | 2015-06-04 | Wall-mounted loud-speaking talkback terminal and loud-speaking talkback system |
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Application publication date: 20150826 |