CN203966252U - A kind of voice-over-net emergency alarm recourse device - Google Patents
A kind of voice-over-net emergency alarm recourse device Download PDFInfo
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- CN203966252U CN203966252U CN201420288486.9U CN201420288486U CN203966252U CN 203966252 U CN203966252 U CN 203966252U CN 201420288486 U CN201420288486 U CN 201420288486U CN 203966252 U CN203966252 U CN 203966252U
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Abstract
The utility model relates to a kind of voice-over-net emergency alarm recourse device, comprising: audio collection and playing module, for gathering and playing sound; Echo cancellation module, eliminates for echo, the noise of sound signal that audio collection and playing module are collected; Power amplifier module is play by audio collection and playing module after the simulated audio signal of echo cancellation module output is amplified again, adjustable; Main control module, is connected with echo cancellation module, for realizing voice A/D conversion, coding, Internet Transmission, management, destruction-proof function.The utility model is combined closely by Ethernet and warning operation system, realizes the intercommunication function effectively remove echo and noise, realizes digital alarm, audio frequency, video interlink, is user-friendly to and the operation operator on duty that reports to the police processes alert.
Description
Technical field
The utility model relates to a kind of voice-over-net emergency alarm recourse device.
Background technology
The occasion that needs alert service in bank etc., need to offer flash appeal alarm button of user conventionally, in case of emergency or can carry out speech talkback to warning operation centre in other situations about need to seek help and ask for help.
The technical scheme of emergency alarm two's complementer device in the market has two kinds, and a kind of is the loudspeaker of emergency alarm two's complementer device and microphone to be connected to rear end equipment by tone frequency channel wire process.This scheme can cause sound effect poor due to the interference of cabling in work progress conventionally, and the phenomenon that can have impedance mismatch due to microphone and the loudspeaker of the different equipment in rear end and front end causes, and difference on effect is large to be safeguarded with being difficult to.Due to the microphone in alarming for help and loudspeaker hypotelorism, produce in addition the echo of circulation.Another is the mode that adopts SIP phone, and emergency alarm two's complementer device is a SIP phone machine, by internet network, forms a set of independently telephone system.This scheme can avoid the on-the-spot cabling of front a kind of scheme to disturb and problem difficult in maintenance.But this scheme still exists the excessive problem of echo, and this independently SIP phone system cannot be fully integrated with warning operation system, can cause runing operator on duty very inconvenient.Therefore need a kind of new device to solve this two problems that scheme exists separately.
Utility model content
The purpose of this utility model is to solve the problems referred to above of prior art, and a kind of brand-new voice-over-net emergency alarm recourse device is provided.
In order to achieve the above object, the utility model proposes a kind of voice-over-net emergency alarm recourse device, comprising:
Audio collection and playing module, for gathering and playing sound;
Echo cancellation module, eliminates for echo, the noise of sound signal that audio collection and playing module are collected;
Power amplifier module is play by audio collection and playing module after the simulated audio signal of echo cancellation module output is amplified again, adjustable;
Main control module, is connected with echo cancellation module, for realizing voice A/D conversion, coding, Internet Transmission, management, destruction-proof function.
Further, described main control module is with being attached thereto the PBU pushbutton unit connecing.
Further, described audio collection and playing module comprise microphone and loudspeaker.
Further, described main control module is connected with echo cancellation module by I2S interface, described main control module is by Ethernet interface access network based on ethernet, by Ethernet, be connected with warning system, described power amplifier module is connected with loudspeaker with echo cancellation module, and described microphone is connected with echo cancellation module.
Further, described power amplifier module adopts D genus audio power amplifier, and has the peak power of 10w, arbitrarily regulating power size.
Further, described echo cancellation module adopts professional DSP integrated circuit, integrated outstanding disappear echo and noise reduction algorithm, and signal to noise ratio (S/N ratio) can reach 102dB, and can realize the sampling rate up to 96K.
Further, described main control module adopts dominant frequency up to the high-performance ARMCPU of Mhz more than 300.
Further, described ARM CPU operation linux2.6 operating system.
Further, the interface of described ARM CPU comprises Ethernet interface, I2S audio interface and the I/O interface of 10M/100M auto-negotiation.
Further, described main control module adopts decomposing prevention circuit design, when alarm button is split and malice short circuit after, system can detect and report to warning system automatically.
The voice-over-net emergency alarm recourse device the utility model proposes mainly can need for bank etc. the occasion of alert service.When user needs emergency alarm or seeks help, press the button of lower device, can produce a pulse signal, this signal triggers main control module, main control module can be notified warning operation system by Ethernet after receiving signal, warning operation system can enter alarm flow after receiving this request signal, and warning system is carried out two-way voice transmissions by network and alarm and calling for help device, realizes intercommunication function.In addition, device also has the function of tamper, and generally alarm button is in normally off, when being removed and during malice short circuit, main control module can automatically identify and produce alerting signal to operation centre.
Accompanying drawing explanation
Fig. 1 is composition frame chart of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, specific embodiment of the utility model is described in further detail.
As shown in Figure 1, voice-over-net emergency alarm recourse device of the present utility model, comprising: audio collection and playing module, power amplifier module, echo cancellation module, four modules of main control module.
Workflow is, after pressing flash appeal button, user can produce a pulse signal to main control module, main control module is notified warning system by Ethernet after receiving signal, and warning system starts alarm flow after receiving alerting signal, opens two-way voice talkback function.Warning system by Ethernet to voice-over-net emergency alarm recourse device request two-way voice talkback.At this moment microphone gathers audio frequency, the sound signal collecting is proceeded to echo cancellation module, first carry out A/D conversion, convert thereof into DAB, and carry out echo cancellation, then by I2S interface, proceed to main control module, main control module carries out DAB to be transferred to warning system after compressed encoding; Main control module receives by Ethernet the compressed voice data that warning system transmits simultaneously, decode, decoded voice data is given to echo cancellation module by I2S interface, first echo cancellation module carries out echo filtration, then carry out D/A conversion, convert simulated audio signal to, simulated audio signal is play by loudspeaker after power amplifier module amplifies again.So just completed the speech talkback of full duplex.In whole process, alarm flow can combine audio frequency with video, and handle together in conjunction with digital alarm, not only speech talkback is closely linked with alarm flow, and all transmission are all undertaken by network, transmission be all digital signal, avoided wiring to disturb and resistance matching problem, and integrated professional echo cancellation module, effectively solved on-the-spot echo problem.
Wherein power amplifier module adopts D genus audio power amplifier, possesses efficiency high, the feature that volume is little.And the peak power with 10w, regulating power is big or small arbitrarily, meets the application demand of on-the-spot varying environment.
Echo cancellation module has adopted professional DSP integrated circuit, integrated outstanding disappear echo and noise reduction algorithm, and signal to noise ratio (S/N ratio) can reach 102dB, and can carry out the sampling rate up to 96K.
Main control module has adopted high performance ARM CPU, and dominant frequency is up to Mhz more than 300, and operation linux2.6 operating system is reliable and stable and can easily tackle 96K monophonic audio compressed encoding.This cpu i/f is abundant, meets all interface requirementss of device, comprises the Ethernet interface, I2S audio interface, I/O of 10M/100M auto-negotiation etc.Main control module has also adopted decomposing prevention circuit design in addition, when alarm button is split and malice short circuit after, system can detect and report to warning system automatically.
As mentioned above, this device is an independently audio frequency talk back equipment, during with being connected of warning system by Ethernet, transmission be pure digi-tal signal, avoided the interference that wiring brings and the resistance matching problem being connected with warning system.This device is closely linked and forms complete warning system with warning operation system again, and digital alarm, audio frequency, video link, and brings great convenience to the operator on duty of operation centre.
Claims (10)
1. a voice-over-net emergency alarm recourse device, is characterized in that, comprising:
Audio collection and playing module, for gathering and playing sound;
Echo cancellation module, eliminates for echo, the noise of sound signal that audio collection and playing module are collected;
Power amplifier module is play by audio collection and playing module after the simulated audio signal of echo cancellation module output is amplified again, adjustable;
Main control module, is connected with echo cancellation module, for realizing voice A/D conversion, coding, Internet Transmission, management, destruction-proof function.
2. voice-over-net emergency alarm recourse device according to claim 1, is characterized in that, described main control module is with being attached thereto the PBU pushbutton unit connecing.
3. voice-over-net emergency alarm recourse device according to claim 1, is characterized in that, described audio collection and playing module comprise microphone and loudspeaker.
4. voice-over-net emergency alarm recourse device according to claim 3, it is characterized in that, described main control module is connected with echo cancellation module by I2S interface, described main control module is by Ethernet interface access network based on ethernet, by Ethernet, be connected with warning system, described power amplifier module is connected with loudspeaker with echo cancellation module, and described microphone is connected with echo cancellation module.
5. voice-over-net emergency alarm recourse device according to claim 1, is characterized in that, described power amplifier module adopts D genus audio power amplifier, and has the peak power of 10w, arbitrarily regulating power size.
6. voice-over-net emergency alarm recourse device according to claim 1, it is characterized in that, described echo cancellation module adopts professional DSP integrated circuit, integrated outstanding disappear echo and noise reduction algorithm, signal to noise ratio (S/N ratio) can reach 102dB, and can realize the sampling rate up to 96K.
7. voice-over-net emergency alarm recourse device according to claim 1, is characterized in that, described main control module adopts dominant frequency up to the high-performance ARM CPU of Mhz more than 300.
8. voice-over-net emergency alarm recourse device according to claim 7, is characterized in that, described ARM CPU operation linux2.6 operating system.
9. voice-over-net emergency alarm recourse device according to claim 7, is characterized in that, wherein, the interface of described ARM CPU comprises Ethernet interface, I2S audio interface and the I/O interface of 10M/100M auto-negotiation.
10. voice-over-net emergency alarm recourse device according to claim 1, is characterized in that, described main control module adopts decomposing prevention circuit design, when alarm button is split and malice short circuit after, system can detect and report to warning system automatically.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420288486.9U CN203966252U (en) | 2014-05-30 | 2014-05-30 | A kind of voice-over-net emergency alarm recourse device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420288486.9U CN203966252U (en) | 2014-05-30 | 2014-05-30 | A kind of voice-over-net emergency alarm recourse device |
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| CN203966252U true CN203966252U (en) | 2014-11-26 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105391967A (en) * | 2015-12-17 | 2016-03-09 | 天津市安佳信科技发展股份有限公司 | Building intercom alarm system |
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2014
- 2014-05-30 CN CN201420288486.9U patent/CN203966252U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105391967A (en) * | 2015-12-17 | 2016-03-09 | 天津市安佳信科技发展股份有限公司 | Building intercom alarm system |
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