CN205621436U - Motor car broadcasting analog system - Google Patents
Motor car broadcasting analog system Download PDFInfo
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- CN205621436U CN205621436U CN201620458115.XU CN201620458115U CN205621436U CN 205621436 U CN205621436 U CN 205621436U CN 201620458115 U CN201620458115 U CN 201620458115U CN 205621436 U CN205621436 U CN 205621436U
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Abstract
The utility model discloses a motor car broadcasting analog system, including setting up in back end monitoring center's voice acquisition device, a plurality of voice broadcast device that sets up in simulation train waiting room, voice acquisition device passes through the wire communication and is connected with the voice broadcast device, voice acquisition device includes the omni -direction microphone, directional microphone, the negative circuit, first amplifying circuit, the synthetic ratio circuit of homophase, the 2nd amplifier circuit and the 2nd communication unit, the input connection of negative circuit and the synthetic ratio circuit of homophase is passed through in the output of omni -direction microphone, the input connection of first amplifying circuit and the synthetic ratio circuit of homophase is passed through in directional microphone's output, the output of the synthetic ratio circuit of homophase is connected through the 2nd amplifier circuit and the unlimited communication unit of second, the 2nd communication unit and voice broadcast device communication connection. The utility model provides a be provided with audio frequency filter unit in the voice broadcast equipment, the effective noise signal in the filtering audio frequency has improved the tone quality of the audio frequency reported.
Description
Technical field
This utility model relates to broadcasting system technologies field, particularly relates to a kind of motor-car broadcasts analog system.
Background technology
In at the train station, enter the station when there being train to start or when train delays, the situation such as Articles found, owner please contact, station management personnel need by broadcast system notifications passenger, but the tonequality played back of existing station broadcast system is poor, causing in the environment of this is noisy AT STATION, passenger is difficult to catch broadcasted content.
Utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art, it is provided that a kind of motor-car broadcasts analog system, is provided with filtered audio unit, it is possible to effectively filter out the noise signal in audio frequency, improves the tonequality of the audio frequency of report in the voice broadcast equipment in system.
The purpose of this utility model is achieved through the following technical solutions: a kind of motor-car broadcasts analog system, including being arranged at the voice acquisition device of rear end Surveillance center, multiple simulation train that is arranged at is waited the sound broadcasting device of indoor, and voice acquisition device is connected with sound broadcasting device by wire communication.
Described sound broadcasting device includes controller, audio frequency filter unit, audio power amplifier unit and the first communication unit, controller is connected with audio frequency filter unit and the first communication unit respectively, first communication unit is also connected with voice acquisition device, and audio frequency filter unit is connected with audio power amplifier unit.
Described voice acquisition device includes omni-directional microphone, directional microphone, negative circuit, the first amplifying circuit, homophase synthesis ratio circuit, the second amplifying circuit and the second communication unit, the output of omni-directional microphone is connected by the input of negative circuit with homophase synthesis ratio circuit, the output of directional microphone is connected by the input of the first amplifying circuit with homophase synthesis ratio circuit, the output of homophase synthesis ratio circuit is connected by the second amplifying circuit and the second wireless communication unit, and the second communication unit and the first communication unit communication connect.
Described audio frequency filter unit includes that the first audio input end and the first audio output, the first electric capacity are to the 14th electric capacity, the first inductance to the 5th inductance；Described first audio input end, the first electric capacity, the second electric capacity, the 3rd electric capacity, the 4th electric capacity, the first inductance, the 5th electric capacity and the first audio frequency deferent segment are sequentially connected with；6th electric capacity one end is connected to the first audio input end and the common point of the first electric capacity, one end other end ground connection；Second inductance and the 6th electric capacity are in parallel；3rd inductance and the second electric capacity are in parallel；7th electric capacity and the 8th capacitances in series, and circuit and the second electric capacity parallel connection of the 7th electric capacity and the 8th electric capacity composition；4th inductance one end is connected to the 3rd electric capacity and the common point of the 4th electric capacity, and one end of the other end and the 9th electric capacity connects, the other end ground connection of the 9th electric capacity；Tenth electric capacity and the 4th inductance in parallel；11st electric capacity and the first inductance in parallel；12nd electric capacity and the 13rd capacitances in series, the 12nd electric capacity and the circuit of the 13rd electric capacity composition and the first inductance in parallel, and the 12nd electric capacity and the common point ground connection of the 13rd electric capacity；One end of 5th inductance is connected to the 5th electric capacity and the common point of the first audio output, other end ground connection；14th electric capacity and the 5th inductance in parallel.
Described audio power amplifier unit is adjustable audio power amplifier unit, and adjustable audio power amplifier unit is connected with controller.
Described wire communication is fiber optic communication or coaxial cable communication.
The beneficial effects of the utility model are:
(1) this utility model is provided with in voice broadcast equipment audio frequency filter unit, it is possible to effective filter out the noise signal in the audio content that the first communication unit receives, improves the tonequality of the audio frequency that voice broadcast equipment broadcasts；
(2) this utility model uses wire communication, stable signal transmission, strong anti-interference performance between voice capture device and voice broadcast equipment.
Accompanying drawing explanation
Fig. 1 is the block diagram of this utility model a kind of motor-car broadcasts analog system.
Detailed description of the invention
The technical solution of the utility model is described in further detail below in conjunction with the accompanying drawings, but protection domain of the present utility model is not limited to the following stated.
As it is shown in figure 1, a kind of motor-car broadcasts analog system, including being arranged at the voice acquisition device of rear end Surveillance center, multiple simulation train that is arranged at is waited the sound broadcasting device of indoor, and voice acquisition device is connected with sound broadcasting device by wire communication.Announcement information, for gathering the announcement information that the staff being positioned at rear end Surveillance center reports, is then transferred to sound broadcasting device and plays out by voice acquisition device, and notice is positioned at the personnel of waiting room.
Described sound broadcasting device includes controller, audio frequency filter unit, audio power amplifier unit and the first communication unit, controller is connected with audio frequency filter unit and the first communication unit respectively, first communication unit is also connected with voice acquisition device, and audio frequency filter unit is connected with audio power amplifier unit.
Described voice acquisition device includes omni-directional microphone, directional microphone, negative circuit, the first amplifying circuit, homophase synthesis ratio circuit, the second amplifying circuit and the second communication unit, the output of omni-directional microphone is connected by the input of negative circuit with homophase synthesis ratio circuit, the output of directional microphone is connected by the input of the first amplifying circuit with homophase synthesis ratio circuit, the output of homophase synthesis ratio circuit is connected by the second amplifying circuit and the second wireless communication unit, and the second communication unit and the first communication unit communication connect.
Described audio frequency filter unit includes that the first audio input end and the first audio output, the first electric capacity are to the 14th electric capacity, the first inductance to the 5th inductance；Described first audio input end, the first electric capacity, the second electric capacity, the 3rd electric capacity, the 4th electric capacity, the first inductance, the 5th electric capacity and the first audio frequency deferent segment are sequentially connected with；6th electric capacity one end is connected to the first audio input end and the common point of the first electric capacity, one end other end ground connection；Second inductance and the 6th electric capacity are in parallel；3rd inductance and the second electric capacity are in parallel；7th electric capacity and the 8th capacitances in series, and circuit and the second electric capacity parallel connection of the 7th electric capacity and the 8th electric capacity composition；4th inductance one end is connected to the 3rd electric capacity and the common point of the 4th electric capacity, and one end of the other end and the 9th electric capacity connects, the other end ground connection of the 9th electric capacity；Tenth electric capacity and the 4th inductance in parallel；11st electric capacity and the first inductance in parallel；12nd electric capacity and the 13rd capacitances in series, the 12nd electric capacity and the circuit of the 13rd electric capacity composition and the first inductance in parallel, and the 12nd electric capacity and the common point ground connection of the 13rd electric capacity；One end of 5th inductance is connected to the 5th electric capacity and the common point of the first audio output, other end ground connection；14th electric capacity and the 5th inductance in parallel.Audio frequency filter unit, while improving the outer rejection ability of proximal band, will not deteriorate band standing internal wave, it is possible to effectively filtered noise signals, improves the tonequality of voice broadcast equipment.
Described audio power amplifier unit includes that integrated operational amplifier, the first transistor are to the 4th transistor, the first potentiometer to the 3rd potentiometer, speaker；The IN-end of integrated operational amplifier passes sequentially through the second resistance and the second capacity earth, the IN-end of integrated operational amplifier connects the second fixing end of the second potentiometer also by the 3rd resistance, the IN+ end of integrated operational amplifier connects the adjustable end of the first potentiometer by the first electric capacity, the IN+ end of integrated operational amplifier connects the second fixing end of the first potentiometer also by the first resistance, the V+ end of integrated operational amplifier connects+12V voltage, the V-end of integrated operational amplifier connects-12V voltage, the OUT terminal of integrated operational amplifier passes sequentially through the first diode and the V-end of the 5th resistance connection integrated operational amplifier, the OUT terminal of integrated operational amplifier connects the second fixing end of described 3rd potentiometer also by the second diode；The base stage of the first transistor connects the first fixing end of the 3rd potentiometer and connects the V+ end of integrated operational amplifier, colelctor electrode by the 4th resistance and connect the colelctor electrode of transistor seconds respectively by the tenth resistance and the V+ end of integrated operational amplifier, emitter stage connect the base stage of transistor seconds and pass sequentially through the 6th resistance and the 11st resistance connects the emitter stage of third transistor；The emitter stage of transistor seconds connects the colelctor electrode of described 4th transistor by the 8th resistance；The base stage of third transistor connects the positive pole of described first diode, colelctor electrode connects the base stage of described 4th transistor and is connected the V-end of integrated operational amplifier by the 7th resistance；The colelctor electrode of the 4th transistor connect the first fixing end of described second potentiometer and be connected between the 6th resistance and the 11st resistance, emitter stage connects the V-end of integrated operational amplifier by the 9th resistance；The fixing end of the first of first potentiometer connects the first audio output, the second fixing end ground connection；The fixing end of the first of second potentiometer is connected to an input of speaker and by the 12nd resistance and the 3rd capacity earth successively.
Described audio power amplifier unit is adjustable audio power amplifier unit, and adjustable audio power amplifier unit is connected with controller.
Described wire communication is fiber optic communication or coaxial cable communication.
The above is only preferred implementation of the present utility model, it is to be understood that this utility model is not limited to form disclosed herein, it is not to be taken as the eliminating to other embodiments, and can be used for other combinations various, amendment and environment, and can be modified by above-mentioned teaching or the technology of association area or knowledge in contemplated scope described herein.And the change that those skilled in the art are carried out and change are without departing from spirit and scope of the present utility model, the most all should be in the protection domain of this utility model claims.
Claims (4)
1. a motor-car broadcasts analog system, it is characterised in that: include being arranged at the voice acquisition device of rear end Surveillance center, multiple simulation train that is arranged at is waited the sound broadcasting device of indoor, and voice acquisition device is connected with sound broadcasting device by wire communication；
Described sound broadcasting device includes controller, audio frequency filter unit, audio power amplifier unit and the first communication unit, controller is connected with audio frequency filter unit and the first communication unit respectively, first communication unit is also connected with voice acquisition device, and audio frequency filter unit is connected with audio power amplifier unit；
Described voice acquisition device includes omni-directional microphone, directional microphone, negative circuit, the first amplifying circuit, homophase synthesis ratio circuit, the second amplifying circuit and the second communication unit, the output of omni-directional microphone is connected by the input of negative circuit with homophase synthesis ratio circuit, the output of directional microphone is connected by the input of the first amplifying circuit with homophase synthesis ratio circuit, the output of homophase synthesis ratio circuit is connected by the second amplifying circuit and the second wireless communication unit, and the second communication unit and the first communication unit communication connect.
A kind of motor-car broadcasts analog system the most according to claim 1, it is characterised in that: described audio frequency filter unit includes that the first audio input end and the first audio output, the first electric capacity are to the 14th electric capacity, the first inductance to the 5th inductance；Described first audio input end, the first electric capacity, the second electric capacity, the 3rd electric capacity, the 4th electric capacity, the first inductance, the 5th electric capacity and the first audio frequency deferent segment are sequentially connected with；6th electric capacity one end is connected to the first audio input end and the common point of the first electric capacity, one end other end ground connection；Second inductance and the 6th electric capacity are in parallel；3rd inductance and the second electric capacity are in parallel；7th electric capacity and the 8th capacitances in series, and circuit and the second electric capacity parallel connection of the 7th electric capacity and the 8th electric capacity composition；4th inductance one end is connected to the 3rd electric capacity and the common point of the 4th electric capacity, and one end of the other end and the 9th electric capacity connects, the other end ground connection of the 9th electric capacity；Tenth electric capacity and the 4th inductance in parallel；11st electric capacity and the first inductance in parallel；12nd electric capacity and the 13rd capacitances in series, the 12nd electric capacity and the circuit of the 13rd electric capacity composition and the first inductance in parallel, and the 12nd electric capacity and the common point ground connection of the 13rd electric capacity；One end of 5th inductance is connected to the 5th electric capacity and the common point of the first audio output, other end ground connection；14th electric capacity and the 5th inductance in parallel.
A kind of motor-car broadcasts analog system the most according to claim 1, it is characterised in that: described audio power amplifier unit is adjustable audio power amplifier unit, and adjustable audio power amplifier unit is connected with controller.
A kind of motor-car broadcasts analog system the most according to claim 1, it is characterised in that: described wire communication is fiber optic communication or coaxial cable communication.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620458115.XU CN205621436U (en) | 2016-05-19 | 2016-05-19 | Motor car broadcasting analog system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620458115.XU CN205621436U (en) | 2016-05-19 | 2016-05-19 | Motor car broadcasting analog system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205621436U true CN205621436U (en) | 2016-10-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620458115.XU Expired - Fee Related CN205621436U (en) | 2016-05-19 | 2016-05-19 | Motor car broadcasting analog system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205621436U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105845147A (en) * | 2016-05-19 | 2016-08-10 | 成都零线科技有限公司 | Motor car broadcast simulation system |
-
2016
- 2016-05-19 CN CN201620458115.XU patent/CN205621436U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105845147A (en) * | 2016-05-19 | 2016-08-10 | 成都零线科技有限公司 | Motor car broadcast simulation system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161005 Termination date: 20180519 |