CN201403206Y

CN201403206Y - Switching device of mobile telephone and radio stations

Info

Publication number: CN201403206Y
Application number: CN2009201189320U
Authority: CN
Inventors: 张志敏
Original assignee: ZHEJIANG ANZHENG TECHNOLOGY Co Ltd
Current assignee: Zhejiang An Zheng Science and Technology Co., Ltd.
Priority date: 2009-04-30
Filing date: 2009-04-30
Publication date: 2010-02-10
Anticipated expiration: 2019-04-30

Abstract

A switching device of mobile telephone and radio stations for emergency communication guarantee mainly comprises an outer shell, a power supply module, a digital audio frequency processing module, a DSP digital processing module and DSP processing software. The switching device of mobile telephone and radio stations is characterized in that an external mobile telephone MIC, a GND, an external radio station, voice signals, a MIC signal and a GND signal are connected to the digital audio frequency processing module through a DB15 interface, PTT and COR signals of the external radio station are connected to the DSP digital processing module through the DB15 interface, external vehicle-mounted 9 to 36V power supplies are input into the power supply module through a power supply interface, thepower supply module converts an external power supply into 3.3V for providing power for the digital audio frequency processing module and the DSP digital processing module, and voice signals of the external mobile telephones are connected to a voice switch through the DB15 interface and are connected with the GND or the digital audio frequency processing module through the voice switch. As a switching device of mobile telephone and radio stations, the utility model can be applied in various vehicle-mounted emergency communication devices of different vehicle types, the switching device of mobile telephone and radio stations can be particularly applied in occasions of constructing one or a plurality of radio station communication networks temporarily on the spot, the switching device of mobile telephone and radio stations realizes uniform dispatching of a command center, and thereby the switching device of mobile telephone and radio stations has very strong application value in the field of emergency communication.

Description

Mobile phone and radio station switching device

Technical field

The utility model relates to a kind of mobile phone and the radio station switching device that emergency communication ensures, especially a kind of voice communications facility of realizing that remote station uses mobile telephone network to converse as relaying under no radio signals overlay environment of being used for.

Background technology

As everyone knows, radio station's (comprising hand-held station) is merely able to communicate in certain scope or carries out mutual communication in certain coverage, it is requisite a kind of means of communication in the emergency communication, for example: Digital Clusterings such as IDEN, 350M general communication net, general conventional intercom system etc.Because the cost height, the investment huge, the area wide, the network coverage is very poor.For a plurality of radio station that can realize not having the scene of the accident in the coverage can keep conversation with Police Command Center, realize commander in real time, having very much to have a kind of facility that can be linked into on-the-spot radio station speech command centre of employing.Present similar products have only by short-wave radio set and carry out ultrashort voice transit, because investment is big, sound effect is poor, using at closely (in 600 kilometers) simultaneously has bigger restriction, and few people adopt.This product is to have adopted a kind of special product of public's mobile telephone network as the voice trunking in radio station, current digitlization Audio Processing is very ripe, specialized DSP process chip and speech digit process chip have obtained using widely, this product has promptly adopted the DSP digital processing chip, realizes that by multiple algorithm and control technology two different communication systems communicate.

Mobile phone and radio station switching device are made up of shell, power supply circuits, digital signal processor, digital audio processing chip, DSP process software system, peripheral interface; This product generally is installed in the emergency management and rescue car, and power supply is used in wide voltage chip, applicable to various vehicles.

Summary of the invention

The purpose of this utility model is to overcome the deficiency of the station telecommunication network coverage, and provides a kind of simple in structure, and easy to use, volume is little, well behaved mobile phone and radio station switching device.

The purpose of this utility model is finished by following technical solution, it mainly comprises shell, power module, Digital audio process module, DSP digital signal processing module, DSP process software, and described outside mobile phone MIC, GND and outside radio station, voice signal, signals such as MIC, GND are connected to Digital audio process module by the DB15 interface; PTT, the COR signal in outside radio station are connected to the DSP digital signal processing module via the DB15 interface, outside vehicle-mounted 9 to 36V power supply inputs to power module via power interface, and it is the power supply of Digital audio process module DSP digital signal processing module that power module transfers external power source to 3.3V.The voice signal of outside mobile phone is connected to the speech switch by DB15, and connects GND or Digital audio process module by switch; By the DSP digital signal processing module digital speech on both sides is carried out behind software filtering, level and smooth, noise reduction, analysis, the identification DTMF from other direction output, simultaneously according to analyzing and the result of identification judges whether open the PTT signal and whether support radio station priority scheduling strategy.

The present invention has extended the coverage of radio station, has reduced investment, owing to aim at vehicle-mounted design, is more convenient for installing and carries simultaneously, and the link that ensures for each emergency communication provides strong support.

Communication interconnecting function of the present invention makes carry out conversation with command centre under the situation that can cover in no radio station at the scene of emergency communication, the speech and the command centre in a plurality of different radio station, scene are interconnected, and this sets up interim command system for emergency communication solution preferably is provided.

Description of drawings

Fig. 1 is a circuit structure block diagram of the present utility model.

Fig. 2 is a software main program process chart of the present utility model.

Fig. 3 is a software-interrupt routine process chart of the present utility model.

Embodiment

Below in conjunction with accompanying drawing the utility model is described in detail: the utility model mainly comprises shell, power module, Digital audio process module, DSP digital signal processing module, DSP process software.Shown in the accompanying drawing 1, outside mobile phone MIC, GND and outside radio station, voice signal, signals such as MIC, GND are connected to Digital audio process module 2 by DB15 interface 1; PTT, the COR signal in outside radio station are connected to DSP digital signal processing module 3 via DB15 interface 1, outside vehicle-mounted 9 to 36V power supply inputs to power module 5 via power interface 4, and it is Digital audio process module 2 and 3 power supplies of DSP digital signal processing module that power module 5 transfers external power source to 3.3V.The voice signal of outside mobile phone is connected to speech switch 6 by DB15 interface 1, and connects GND or Digital audio process module 2 by switch; By the DSP digital signal processing module digital speech on both sides is carried out behind software filtering, level and smooth, noise reduction, analysis, the identification DTMF from other direction output, simultaneously according to analyzing and the result of identification judges whether open the PTT signal and whether support radio station priority scheduling strategy.

The voice signal of mobile phone inputs to Digital audio process module 2 by DB15 interface 1, and these voice are digitized delivers to DSP digital signal processing module 3, and DSP digital signal processing module 3 is divided into two parts on software: Interrupt Process part and main program.The MIC that interrupt handling routine is responsible for the data in the buffering area are sent to ancillary equipment receives buffering area, be responsible for simultaneously that input voice data with the outside reads in and buffer memory to the data buffer zone; Speech data in the buffering area that main program receives carries out FIR filtering, remove external interference signals, and carry out the inhibition of background noise according to the gain of signal, judge the PTT signal of whether opening the radio station according to the pronouncing frequency that whether meets the people, in this case, basically do not have wrong judgement, can not cause interference to station telecommunication owing to the background noise of mobile phone; Simultaneously, whether receive signal COR according to the radio station and judge whether have the radio station giving orders or instructions, because the radio station belongs to on-the-spot emergency communication equipment, priority is higher than the speech of mobile phone, therefore closes transmitting of PTT when the COR signal occurring.

PTT need be opened in advance in the radio station when sending speech, will lag behind after the transmission speech is finished simultaneously and close PTT, and this delay by timer in main program is controlled.Time of delay in advance is adjustable to 1000ms at 100ms, and the time of delay of hysteresis is because people's language speed, about 500ms of the free time between word and word, so lag time should be greater than 500ms and less than 3000ms.

The utility model has adopted DSP digital speech processing chip, and the voice signal in mobile phone GSM/CDMA/3G etc. and radio station is carried out digitlization, filtering, level and smooth, noise reduction, analysis, identification and intercommunication.

The utility model adopts a kind of digital processing technology that public's mobile telephone network and radio station equipment are coupled together, and realizes that one or more long-range radio station accesses to certain specific commander by mobile telephone network as relaying and converses a little and converse mutually.Adopted mobile phone be not limited to devices such as mobile phone, telephone set, comprise the equipment such as MODEM that can insert public's mobile telephone network simultaneously.

Digital audio process module 2 described in the utility model is connected with mobile phone phonetic input, MIC, the GND of outside, and Digital audio process module 2 is connected with radio station phonetic entry, MIC, the GND of outside simultaneously.

Data that described Digital audio process module 2 is collected are carried out behind filtering, level and smooth, noise reduction, analysis, the identification DTMF from other direction output through DSP digital signal processing module 3; The utility model can discern whether authentic voice is imported, and judges whether to open the PTT signal in radio station on this basis, has the measuring ability of dtmf signal, and can carry out the control action of voice priority, exterior I/O according to the content of dtmf signal.It can be connected public's mobile telephone network with the station telecommunication system, realize the voice intercommunication between public telephone and radio station system, the connection device that adopts is not limited to devices such as mobile phone, telephone set, comprises the equipment such as MODEM that can insert public's mobile telephone network simultaneously.

The technology that the utility model is not elaborated is known technology, and those skilled in the art can implement the present invention easily on the basis of understanding this specification, and represented content is the part of this specification in the accompanying drawing.

Claims

1, a kind of mobile phone and radio station switching device, it mainly comprises shell, power module, Digital audio process module, DSP digital signal processing module, DSP process software composition, and described outside mobile phone MIC, GND and outside radio station, voice signal, signals such as MIC, GND are connected to Digital audio process module (2) by DB15 interface (1); PTT, the COR signal in outside radio station are connected to DSP digital signal processing module (3) via DB15 interface (1), outside vehicle-mounted 9 to 36V power supply inputs to power module (5) via power interface (4), and it is Digital audio process module (2) DSP digital signal processing module (3) power supply that power module (5) transfers external power source to 3.3V.

2, mobile phone according to claim 1 and radio station switching device is characterized in that the voice signal of outside mobile phone is connected to speech switch (6) by DB15 (1), and connect GND or Digital audio process module (2) by switch.

3, mobile phone according to claim 1 and 2 and radio station switching device is characterized in that data that described Digital audio process module (2) collected carry out behind filtering, level and smooth, noise reduction, analysis, the identification DTMF from other direction output through DSP digital signal processing modules (3).