CN201754594U

CN201754594U - Mining broadcast telephone with digital voice compressing function

Info

Publication number: CN201754594U
Application number: CN2010202933994U
Authority: CN
Inventors: 刘正怀; 程家龙
Original assignee: Hefei Xiangfei Electronic Co ltd
Current assignee: Hefei Xiangfei Electronic Co ltd
Priority date: 2010-08-09
Filing date: 2010-08-09
Publication date: 2011-03-02
Anticipated expiration: 2020-08-09

Abstract

The utility model discloses a mining broadcast telephone with a digital voice compressing function, composed of a power supply management module, a central control module, a display module, a voice compressing and decompressing module, an audio amplification module, a voice alarm module, an output module and a communication module. The a 32-bit low power consumption monolithic computer of novel high performance ARM7 core series is used as the central control core, the voice compression technique, the voice data and control instruction synchronous transmission technique and a CAN bus technique are used to meke the device have the features of simple peripheral circuit and high reliability, the high performance CAN bus can effectively make sure the transmission distance of the voice data and the control instruction data achieve 10Km, the latest compressing and decompressing chip CMX618 WITH forward error correction function is used for voice compression with the features of high compression efficiency and good speech quality.

Description

Mining expansion telephone call screener with digital speech compression function

Technical field

The utility model relates to a kind of mining expansion telephone call screener with digital speech compression function.

Background technology

Expanding telephone call screener is that communication, signal contact, sound and light alarm and the anxious locking device of closing down are broadcast in a kind of mine intrinsic safety type expansion, is applicable to the environment that gas, coal dust explosion hazard are arranged under the coal mine.It can have of one's own to expand broadcasts communication and sending dotter signal contacted system, also can accept external control signal, can send the sound and light alarm signal, is used for equipment starting advance notice or warning.But common mining expansion telephone call screener adopts the analog signal transmission voice signal, and communication distance is short, and signal to noise ratio is low; Especially along with the extensive use of big-power transducer, soft start in the down-hole, disturb more obvious, even reach can't normal communication state.

The utility model content

The purpose of this utility model provides a kind of mining expansion telephone call screener with digital speech compression function, adopting 32 low-power scms of novel high-performance ARM7 kernel series is central authorities' control cores, adopts voice compression technique, speech data and control command simultaneous interpretation technology, CAN bussing technique, makes device have characteristics such as peripheral circuit is simple, reliability height; High-performance CAN bus will guarantee effectively that speech data, control command data transmission distance reach 10Km; Characteristics such as compress speech adopts up-to-date compression, decoder chips CMX618 with forward error correction function, has the compression efficiency height, and voice call quality is good.

The technical solution of the utility model is as follows:

A kind of mining expansion telephone call screener with digital speech compression function, form by power management module, central control module, display module, compress speech decompression module, audio frequency amplification module, audio alert module, output module and communication module, it is characterized in that: voice signal is sent into described compress speech decompression module through described audio frequency amplification module, and the signal output part of described compress speech decompression module links to each other with the input of described central control module; The external audio alert module of the input of described central control module, the output of described central control module is external display module, output module and communication module respectively; The power output end of described power management module links to each other with the power input of described central control module, display module, compress speech decompression module, audio frequency amplification module, audio alert module, output module and communication module respectively.

Described mining expansion telephone call screener with digital speech compression function is characterized in that: described central control module is made up of the 64 pin chip LPC2132 single-chip microcomputers and the peripheral circuit thereof of ARM series kernel.

The beneficial effects of the utility model:

(1), the utility model adopts the central processing unit of 32 ARM7 kernel series, the performance height, processing speed is fast, peripheral circuit is succinctly reliable.

(2), the utility model adopts digitize voice compression, decompression technique, voice call quality is good.

(3), the utility model adopts the CAN bussing technique, the digital speech speech range is far away, can reach 10Km farthest.

(4), the utility model adopts the LCD liquid crystal display screen, has good man computer interface.

(5), speech data of the present utility model, control data be by a bus simultaneous interpretation, has characteristics such as easy-to-connect, failure rate are low.

(6), the utility model adopts intrinsic safety electric source, guaranteed colliery product safety requirement.

Description of drawings

Fig. 1 is a structural principle block diagram of the present utility model.

Embodiment

Referring to Fig. 1, a kind of mining expansion telephone call screener with digital speech compression function, by power management module 1, central control module 2, display module 3, compress speech decompression module 4, audio frequency amplification module 5, audio alert module 6, output module 7 and communication module 8 are formed, voice signal is sent into compress speech decompression module 4 after audio frequency amplification module 5 amplifies, carry out speech signal collection, compression, simultaneously, audio frequency amplification module 5 is also accepted the voice signal by the 4 decoding outputs of compress speech decompression module, after the final stage power amplification, send loud voice signal or alarm signal by loud speaker;

The signal output part of compress speech decompression module 4 links to each other with the input of central control module 2, and central control module 2 is made up of the 64 pin chip LPC2132 single-chip microcomputers and the peripheral circuit thereof of ARM series kernel;

The external audio alert module 6 of the input of central control module 2 is got ready along the line at equipment, during fault, and audio alert module 6 is come out the voice messaging of inside solidification under the control of central control module 2 by loudspeaker plays;

The output of central control module 2 is external display module 3, output module 7 and communication module 8 respectively, display module 3 shows friendly man-machine interface, warning message by the LCD screen, output module 7 is exported the failure locking signal when the system failure, communication module 8 is used for exchanging speech communication signal, control command signal on the bus at the scene;

Power management module 1 is an intrinsic safety electric source, the power output end of power management module 1 links to each other with central control module 2, display module 3, compress speech decompression module 4, audio frequency amplification module 5, audio alert module 6, output module 7 and the power input of communication module 8 respectively, for all modules are carried out the intrinsic safety type power supply.

Claims

1. mining expansion telephone call screener with digital speech compression function, form by power management module, central control module, display module, compress speech decompression module, audio frequency amplification module, audio alert module, output module and communication module, it is characterized in that: voice signal is sent into described compress speech decompression module through described audio frequency amplification module, and the signal output part of described compress speech decompression module links to each other with the input of described central control module; The external audio alert module of the input of described central control module, the output of described central control module is external display module, output module and communication module respectively; The power output end of described power management module links to each other with the power input of described central control module, display module, compress speech decompression module, audio frequency amplification module, audio alert module, output module and communication module respectively.

2. the mining expansion telephone call screener with digital speech compression function according to claim 1 is characterized in that: described central control module is made up of the 64 pin chip LPC2132 single-chip microcomputers and the peripheral circuit thereof of ARM series kernel.