CN205812037U - A kind of off host broadcast intercom system - Google Patents
A kind of off host broadcast intercom system Download PDFInfo
- Publication number
- CN205812037U CN205812037U CN201620631436.5U CN201620631436U CN205812037U CN 205812037 U CN205812037 U CN 205812037U CN 201620631436 U CN201620631436 U CN 201620631436U CN 205812037 U CN205812037 U CN 205812037U
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- circuit
- words
- station
- words station
- broadcast
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- Interconnected Communication Systems, Intercoms, And Interphones (AREA)
Abstract
The utility model discloses a kind of off host broadcast intercom system, it is characterized in that, including I2C communication bus, the talk channel of transmitting voice information, power circuit and multiple words station, each words station utilizes I2C communication bus to build bus-type communication network as physical layer, sets up call by I2C transmission various control instruction information, and by talk channel transmitting voice information.
Description
Technical field
This utility model relates to a kind of broadcast intercom system.
Background technology
Telephone communication is one of current main communication mode, is used widely in occasions such as enterprise, school and prisons.
The required telephonic communication system of these occasions is to make that calling subscribe is easy, obtain connection with called subscriber quickly and accurately
System, it is achieved the functions such as production scheduling, phone, page and liaison.Especially dangerous situation is occurring or emergency is occurring
Time, caller can be got in touch with called subscriber rapidly, in order to processes dangerous situation in time.Currently used broadcast intercom system is many
For there being main-machine communication system, having main-machine communication system height to rely on the program control scheduling of main frame, system structure is complicated, and cost is higher,
Reliability is low.This system can support most 128 words stations.
Summary of the invention
The purpose of this utility model is to provide a kind of cost relatively low, it is not necessary to the broadcast intercom system of main frame.
This utility model is by the following technical solutions: a kind of off host broadcast intercom system, it is characterised in that include I2C
Communication bus, the talk channel of transmitting voice information, power circuit and multiple words station, each words station utilizes I2C communication bus to make
Build bus-type communication network for physical layer, set up call by I2C transmission various control instruction information, and pass through
Talk channel transmitting voice information.
Technical characteristic of the present utility model also resides in: each words station is by LPC2468 minimum system, interface circuit, broadcast electricity
Road, speaking circuit, signal sound produce circuit, line select switch, picking/hanging machine detection circuit, ringing circuit, watchdog circuit with
And power-switching circuit, keyboard and LCD display circuit and the LCD display composition coordinated with LCD display circuit, each words station is logical
Cross I2C communication control circuit produce various control instructions, and connect I2C communication bus carry out instruction transmission, each words station is passed through
Line select switch connects talk channel, and each words station connects power circuit by power-switching circuit.
This system number one words station is set to master control words station, and other are mandarin station, after master control words stand in system initialization, logical
Cross I2C communication control circuit to other distribution address, words station of circuit.
Described speaking circuit is by sending words amplifier, called amplifier, anti-side-tone circuit, output control circuit to form, described
Signal sound produces circuit and is made up of 555 intervalometers and peripheral circuit thereof, and described broadcast circuit is amplified by preamplifying circuit, rear class
Circuit, speaker and the working power etc. of amplifying form, and complete amplification and the output of broadcast singal, and described line select switch is by list
Sheet machine controls relay and completes the selection to talk channel of speaking circuit or broadcast circuit.
Described system arranges a relay amplifier every 30 words stations.
Compared with the prior art, the beneficial effects of the utility model are embodied in: 1. this system off host, simple in construction, are
Uniting more stable, wiring and wiring are more convenient, and are provided with relay amplifier, can be prevented effectively from the loss of signal and decay.
The most all users can be realized individual calling by words station push-button dialing and be generally called two kinds of method of callings, and method of calling is many
Sample, complete function.
3. utilizing I2C communication bus to build communication control net, communication protocol uses the token ring communication mode of dereliction, institute
Having words station conveniently to disconnect, extend more flexible, breakdown maintenance is simpler.
Accompanying drawing explanation
Fig. 1 is this utility model entirety line schematic diagram.
Fig. 2 is this utility model single words station structure schematic diagram.
Detailed description of the invention
With embodiment, this utility model is described in further detail below in conjunction with the accompanying drawings.
Embodiment 1: as it is shown in figure 1, a kind of off host broadcast intercom system, by multiple words stations, talk channel, I2C communication
Bus and power circuit composition.Interconnected by I2C communication bus between each words station, thus form an independent small-sized local
Network.Each words station of system utilizes I2C communication bus to build bus-type communication network as physical layer, by I2C communication bus
Transmit various control instruction information and set up call, then by talk channel transmitting voice information.Owing to voice messaging uses simulation
Signal transmits, and for avoiding the loss of signal and decay, every 30 words stations arrange a relay amplifier, refer to voice signal and control
Information is made to be amplified.This system is provided with 5 talk channels, these 5 talk channels be on line all user's amplifying calls and
Phone intercom is shared.Number one words station is set to master control words station, and other are set to mandarin station.
As in figure 2 it is shown, each words station is by LPC2468 minimum system, interface circuit, speaking circuit, broadcast circuit, signal sound
Produce circuit, line select switch, I2C communication control circuit, picking/hanging machine detection circuit, ringing circuit, watchdog circuit and
Power-switching circuit, keyboard, LCD display circuit and the LCD display composition coordinated with LCD display circuit.Each words station is passed through
Line select switch connects talk channel, and each words station connects power line and common ground, each words by power-switching circuit
Stand and be connected with I2C communication bus by I2C communication control circuit.
Described speaking circuit forms by sending words amplifier, called amplifier, anti-side-tone circuit, output control circuit.
Described signal sound produces circuit and is made up of 555 intervalometers and peripheral circuit thereof.
Described broadcast circuit by preamplifying circuit (being made up of NE5532), rear class amplifying circuit (such as fool 175 circuit),
Speaker and the working power etc. of amplifying forms, and completes amplification and the output of broadcast singal.
Described line select switch is completed speaking circuit or broadcast circuit to talk channel by Single-chip Controlling relay
Selection.
This system is capable of individual calling and generally calls two kinds of talking modes, and method of calling is various.
Work process: after system initialization, master control words station is by I2C communication control circuit to other words station of circuit distributively
Location, there is unique address at each words station.Words station user takes phone, and the picking/hanging machine detection circuit detection at this words station starts, when
Front words station checks currently with or without idle talk channel by I2C communication control circuit, if it did not, user listens busy tone to wait sheet
Carve；Select if it has, system distributes idle talk channel by I2C communication control circuit to active user, the circuit at current words station
Selecting the idle talk channel that switch selects to be distributed, the I2C communication control circuit at current words station sends control by I2C communication bus
System instruction takies this channel to other words station, and user calls address digit by input through keyboard, and user inputs the address of the other side
After number, this address digit is sent to active user place by I2C communication bus by the I2C communication control circuit at current words station
Circuit all words station, these words stations all receive this destination address and compare with Self address, if address is consistent, then purpose words
The ringing circuit stood controls ring sound of movement, and the line select switch at purpose words station selects the idle talk channel of distribution.
After end of conversation, both call sides any one party can first on-hook, then the I2C Control on Communication electricity at on-hook side's words station
Road sends on-hook code by I2C communication bus and discharges this talk channel.
More than conversing for individual calling, generally call call and set up similar to individual calling, difference is that the called words station generally called is more, call
At the end of only caller words station can send on-hook code release talk channel.
Described above is only ultimate principle of the present utility model, not imposes any restrictions this utility model, every foundation
This utility model carries out equivalent variations and modification to it, all within the category of the art of this patent protection scheme.
Claims (3)
1. an off host broadcast intercom system, it is characterised in that include I2C communication bus, the call letter of transmitting voice information
Road, power circuit and multiple words station, each words station utilizes I2C communication bus to build bus-type communication network as physical layer, logical
Cross I2C transmission various control instruction information and set up call, and by talk channel transmitting voice information, system every
30 words stations arrange a relay amplifier, and system number one words station is set to master control words station, and other are mandarin station, master control words station
After system initialization, by I2C communication control circuit to other distribution address, words station of circuit.
A kind of off host broadcast intercom system the most according to claim 1, it is characterised in that each words station is by LPC2468
Minimum system, interface circuit, broadcast circuit, speaking circuit, signal sound produce circuit, line select switch, dislodging machine testing electricity
Road, ringing circuit, watchdog circuit and power-switching circuit, keyboard and LCD display circuit and coordinate with LCD display circuit
LCD display composition, each words station produces various control instructions by I2C communication control circuit, and connects I2C communication bus and enter
Row instruction transmission, each words station connects talk channel by line select switch, and each words station is connected by power-switching circuit
Power circuit.
A kind of off host broadcast intercom system the most according to claim 2, it is characterised in that described speaking circuit is by sending words
Amplifier, called amplifier, anti-side-tone circuit, output control circuit form, described signal sound produce circuit by 555 intervalometers and
Its peripheral circuit constitute, described broadcast circuit by preamplifying circuit, rear class amplifying circuit, amplify speaker and working power group
Becoming, complete amplification and the output of broadcast singal, described line select switch is completed speaking circuit by Single-chip Controlling relay
Or the selection that broadcast circuit is to talk channel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620631436.5U CN205812037U (en) | 2016-06-24 | 2016-06-24 | A kind of off host broadcast intercom system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620631436.5U CN205812037U (en) | 2016-06-24 | 2016-06-24 | A kind of off host broadcast intercom system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205812037U true CN205812037U (en) | 2016-12-14 |
Family
ID=57505389
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620631436.5U Expired - Fee Related CN205812037U (en) | 2016-06-24 | 2016-06-24 | A kind of off host broadcast intercom system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205812037U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107959897A (en) * | 2017-12-12 | 2018-04-24 | 太仓鼎诚电子科技有限公司 | Off host with dial feature amplifies intercommunication telephone communication system |
| CN111355854A (en) * | 2020-03-16 | 2020-06-30 | 青岛中加特电气股份有限公司 | Voice transmission device, system and use method thereof |
-
2016
- 2016-06-24 CN CN201620631436.5U patent/CN205812037U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107959897A (en) * | 2017-12-12 | 2018-04-24 | 太仓鼎诚电子科技有限公司 | Off host with dial feature amplifies intercommunication telephone communication system |
| CN111355854A (en) * | 2020-03-16 | 2020-06-30 | 青岛中加特电气股份有限公司 | Voice transmission device, system and use method thereof |
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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 |
Granted publication date: 20161214 Termination date: 20170624 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |