CN102118609B - Building visual intercom system - Google Patents
Building visual intercom system Download PDFInfo
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- CN102118609B CN102118609B CN201110047607A CN201110047607A CN102118609B CN 102118609 B CN102118609 B CN 102118609B CN 201110047607 A CN201110047607 A CN 201110047607A CN 201110047607 A CN201110047607 A CN 201110047607A CN 102118609 B CN102118609 B CN 102118609B
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Abstract
The invention discloses a building visual intercom system, which comprises management equipment, a floor splitter, an indoor unit, a landing machine, and at least one networking isolator, wherein the floor splitter is in signal connection with the indoor unit; the elevator landing machine is internally provided with a differential signal driving module used for converting a composite video broadcast signal into a differential signal, the floor branching device is internally provided with a differential signal processing module used for converting the differential signal into the composite video broadcast signal, and the networking isolator is internally provided with an adaptive equalization module used for carrying out adaptive processing on the differential signal from the elevator landing machine and then transmitting the differential signal to the supervisor. The invention can adaptively meet the signal transmission requirements of different distances between the signal transmitting end and the receiving end, achieves the transmission of video signals with high quality, low cost and long distance, and brings convenience to actual construction, debugging and later maintenance.
Description
Technical field
The present invention relates to communication technique field, relate in particular to a kind of building visual intercom system.
Background technology
Traditional building visual intercom system adopts the dual mode transmission video signal usually, and a kind of is directly to transmit through coaxial cable, and another kind is to become digital signal to carry out Network Transmission through TCP/IP video signal compression.
When adopting the direct transmission video signal of coaxial cable; Usually the coverage to colour signal only can reach about 600m; And receive in transmission course that connector contact impedance, building ground voltage are poor, the influence of outer signals radiation or factor such as crosstalk; The picture quality of signal receiving end is relatively poor, cause vision signal in the actual engineering after the serious perhaps interference that descends of the display quality after the long Distance Transmission is bigger, even the serious decay of colour signal causes display end almost to can't see coloured image.In addition, because the wire rod characteristic of coaxial cable itself, engineering construction and debugging difficulty are bigger.
Adopt the TCP/IP Network Transmission can solve problems such as long-distance transmissions and image quality decrease preferably; Yet equipment cost is too high; And the long-range network transmission needs to lay a large amount of optical cables; Not only significantly improved engineering cost, and will have the professional to construct, debug and safeguard, so application market is less.
Along with developing rapidly of mechanics of communication, twisted-pair feeders such as CAT5E UTP cable CAT-5 are used for building visual intercom system transmission video signal has become a kind of development trend, can effectively increase transmission range and improve transmission quality.But because the nuance of degree of wrapping and the impedance of the netting twine of different brands on the market; In different distance, need promote the vision signal of corresponding band and just realize the frequency range coupling through different matching networks; Present frequency range coupling is all carried out through manual; Therefore receive the restriction in geographical position, a lot of equipment can not be networked recently, thereby have brought many puzzlements and increased the complexity that construction is connected up to practice of construction; And the network of manual coupling receives the influence of uncontrollable factors such as netting twine material, weather, is difficult to realize the later stage debugging and safeguards, thereby finally cause problems such as the unstable and image quality of system.
Summary of the invention
The technical problem underlying that the present invention will solve is that a kind of building visual intercom system of being convenient to practice of construction and improving picture quality is provided.
For solving the problems of the technologies described above; The present invention provides a kind of building visual intercom system; Comprise management equipment, floor splitter, have video display indoor set, have the ladder-port machine of video monitor; Said floor splitter is connected with the indoor set signal, also comprises at least one networking isolator, and said networking isolator is connected between said floor splitter, management equipment, the ladder-port machine through the twisted-pair feeder signal; Be provided for the composite video broadcast singal is converted to the differential signal driver module of differential signal in the said ladder-port machine; Be provided for differential signal is converted to the differential signal processing module of composite video broadcast singal in the said floor splitter, be provided for the differential signal from said ladder-port machine is carried out transferring to after the self-adaptive processing adaptive balance module of supervisor in the said networking isolator.
Further, also comprise the enclosure wall machine that has video monitor, said enclosure wall machine is connected with said networking isolator signal through twisted-pair feeder, also is provided for the composite video broadcast singal is converted to the differential signal driver module of differential signal in the said enclosure wall machine; Said adaptive balance module also is used for the differential signal from said enclosure wall machine is carried out transferring to said management equipment and/or floor splitter after the self-adaptive processing.
In a kind of execution mode, said management equipment comprises PC transducer and PC supervisor, and said PC transducer signal is connected between said networking isolator and the PC supervisor.
Said management equipment also can comprise general supervisor, is provided for the differential signal conversion module that realizes that conversion of composite video broadcast singal and differential signal are changed in the said general supervisor.
Preferably, said differential signal driver module comprises that model is the differential twisted pair driver of EL5171.
Preferably, said adaptive balance module comprises adaptive equalizer and the corresponding differential twisted pair driver that is connected with said adaptive equalizer.
For example, the model of adaptive equalizer is ISL59605, and the model of differential twisted pair driver is EL5171.
Preferably, said differential signal processing module comprises that model is the feedback amplifier of EL2480.
The model of said twisted-pair feeder is CAT-5.
The invention has the beneficial effects as follows: building visual intercom system of the present invention is utilized twisted-pair line transmission video signal; And realized the autoband coupling of signal through the adaptive balance module in the networking isolator; The system that makes can satisfy the request signal transmission of different distance between signal sending end and the receiving terminal adaptively; Vision signal high-quality, low cost, transmission have at a distance been reached; And, can further meet the need of market for practice of construction, debugging and later maintenance have brought convenience.
Description of drawings
Fig. 1 is the building visual intercom system structured flowchart of first kind of embodiment of the present invention;
Fig. 2 is the building visual intercom system structured flowchart of second kind of embodiment of the present invention;
Fig. 3 is the building visual intercom system structured flowchart of the third embodiment of the present invention;
Fig. 4 is for comprising the circuit diagram of EL5171 in the differential signal driver module of an embodiment of the present invention;
Fig. 5 is for comprising the circuit diagram of ISL59605 in the adaptive balance module of an embodiment of the present invention;
Fig. 6 is for comprising the circuit diagram of EL5171 in the adaptive balance module of an embodiment of the present invention;
Fig. 7 is first's peripheral circuit diagram of the adaptive balance module of an embodiment of the present invention;
Fig. 8 is the second portion peripheral circuit diagram of the adaptive balance module of an embodiment of the present invention;
Fig. 9 is the third part peripheral circuit diagram of the adaptive balance module of an embodiment of the present invention;
Figure 10 is for comprising the circuit diagram of EL2480 in the differential signal processing module of an embodiment of the present invention.
Embodiment
Combine accompanying drawing that the present invention is done further explain through embodiment below.
Please refer to Fig. 1, a kind of building visual intercom system of the present invention comprises the floor splitter, has the indoor set of video display, the ladder-port machine that has video monitor, management equipment, also can comprise the enclosure wall machine.Wherein, the floor splitter is arranged on each floor of every building, and being used to indoor set provides the vision signal through the first-class video monitor collection of making a video recording to supply the user to watch.A networking isolator can be set in every building; This networking isolator is connected the effect of playing the vision signal transfer between floor splitter, management equipment, the ladder-port machine through the twisted-pair feeder signal; When having the outer machine of wall, the outer machine of wall also with between the networking isolator is connected through the twisted-pair feeder signal.After the isolator of for example networking can be used for the vision signal of ladder-port machine or the collection of enclosure wall machine handled; Transferring to distance far away through twisted-pair feeder (for example is that 0～1800m) management equipment is so that administrative staff manage; Perhaps can through twisted-pair feeder will be far away apart from building the vision signal of enclosure wall machine collection transfer to the floor splitter after handling, video signal transmission to the floor splitter that also can will the management equipment far away send through twisted-pair feeder apart from building.
In the present embodiment; The differential signal driver module that all is provided in ladder-port machine or the enclosure wall machine converting CVBS composite video broadcast singal to differential signal is so that transmit in twisted-pair feeder; Preferably, the differential signal driver module comprises that model is the differential twisted pair driver of EL5171.Because the distance between ladder-port machine and the indoor set is usually less than 300m, so ladder-port machine is when being connected with the indoor set signal with the floor splitter through the networking isolator, and vision signal can adopt fixing video attenuation parameter to mate in the transmission of this section circuit.
Be provided for differential signal is converted to the differential signal processing module of CVBS signal in the floor splitter; Be used for through behind the differential signal of networking isolator reception from enclosure wall machine, ladder-port machine or management equipment; Be converted into the CVBS signal so that in the video display of indoor set, play; This differential signal processing module can comprise that model is the differential twisted pair receiver of EL5172, preferably includes the feedback amplifier that model is EL2480, after can differential signal being converted to the cvbs signal and strengthen its driving force; Netting twine through 0～100m transfers to indoor set with the cvbs signal and shows again, can significantly improve signal quality.
Networking is provided for the differential signal from ladder-port machine is carried out transferring to after the self-adaptive processing adaptive balance module of supervisor in the isolator; Under situation with enclosure wall machine; As required, adaptive balance module also is used for the differential signal from the enclosure wall machine is carried out transferring to management equipment, floor splitter or transferring to management equipment and floor splitter simultaneously after the self-adaptive processing.Adaptive balance module comprises adaptive equalizer and the corresponding differential twisted pair driver that is connected with adaptive equalizer, a kind of preferred embodiment in, the model of adaptive equalizer is ISL59605, the model of differential twisted pair driver is EL5171.Differential signal from ladder-port machine or enclosure wall machine at first gets into ISL59605; Through software algorithm and hardware mechanisms differential signal is reduced into the CVBS signal and has realized the autoband coupling; Then thereby the CBBS signal after the reduction converts the differential signal that is applicable to the twisted-pair feeder transmission into through EL5171 again and transfers to corresponding management equipment or floor splitter; Certainly, ISL59605 and EL5171 will transfer to the floor splitter after also can will handling accordingly from the differential signal of management equipment through same mode.
Vision signal is not handled with the networking isolator in some building visual intercom system in the prior art; Perhaps network coupling or fixing parameter that the vision signal of receiving is fixed are compared the mode that signal amplifies again but directly vision signal is switched to the floor splitter through switch; This execution mode carries out self adaptation frequency range coupling through adaptive balance module to the vision signal of twisted-pair feeder transmission; Improved vision signal for the automatic adjustment of distance and the function of adaptation; Solved to a certain extent ladder-port machine to management equipment, enclosure wall machine to management equipment, the enclosure wall machine is uncertain to the distances far away or signal sending end to a plurality of receiving terminals of distance between the indoor set and the constructional difficulties problem that causes, has therefore made things convenient for the feasibility of actual construction and debugging; This execution mode has reduced material cost with performance is strong and the higher relatively ISL59605 of cost is arranged in the few networking isolator of number of devices in addition, has improved the cost performance of system.
Please refer to Fig. 2; Management equipment can comprise general supervisor, also can comprise the PC supervisor, can receive vision signal from ladder-port machine or enclosure wall machine so that it is carried out unified management through the networking isolator; Also can send vision signal through the networking isolator to indoor set where necessary; For example under the state of indoor set and management equipment conversation, when indoor set need extract the video message that is stored in the management equipment, management equipment need be sent vision signal and given indoor set.Video signal processing module is set in the general supervisor and is used to realize the differential signal conversion module that conversion of composite video broadcast singal and differential signal are changed, video signal processing module can directly be handled so that operating personnel manage analog signal accordingly.Under situation with PC supervisor; Also need dispose the PC transducer; This PC transducer signal is connected between networking isolator and the PC supervisor; Be used on the one hand the vision signal of long Distance Transmission is adapted to automatically and mate, be used on the other hand becoming digital video signal that the PC supervisor can cognition so that operating personnel manage analog signal conversion.
According to concrete application scenarios; The quantity of floor splitter, indoor set, ladder-port machine, management equipment and enclosure wall machine in the system, networking isolator and position all can be flexible according to the factors such as quantity of building and floor; In the execution mode for example shown in Figure 3; If there are many building, then every building all have ladder-port machine, realize that with management equipment signal is connected through the networking isolator that is arranged in the corresponding building between a plurality of ladder-port machines.
As shown in Figure 4; Convert differential signal from the CVBS signal of ladder-port machine or the output of enclosure wall machine to through EL5171; This differential signal is sent into the VIDEO+ of circuit shown in Figure 5 behind a segment distance, two inputs of VIDEO-, output CVBS signal after ISL59605 handles then; The EL5171 that this CVBS signal continues input Fig. 6 converts to behind the differential signal from VIDEO_OUT+; Two outputs of VIDEO_OUT-are exported, and then import the EL2480 of Figure 10 again, after it is reduced into differential signal the CVBS signal and amplifies and after distributing, send into indoor set.
Fig. 7 to Fig. 9 is the peripheral circuit of the adaptive balance module of a kind of embodiment, and wherein the circuit of Fig. 7 and Fig. 8 is reserved universal I/O port, can be configured the mode of operation of ISL59605 and optimizes through the high-low level of external MCU through common IO mouth.The circuit of Fig. 9 is used for the state indication of ISL159605;, adaptive balance module will export 1 locking signal (lock) after mating vision signal automatically; 1 condition indicative signal (color) with colour signal; When the invert signal level is that height explains that the 2 signal line transmitting terminals and the receiving terminal of transmission of video are reverse; Adaptive balance module has also been accomplished the adjustment and the upset of signal polarity through algorithm, if the invert signal level is low, the holding wire transmitting terminal is described and is received holding wire just in time in the same way.
Twisted-pair feeder can adopt cables such as CAT5E UTP cable CAT-5, not only can realize the distant signal transmission, and seeing that the strong anti-interference ability of differential signal can significantly improve signal transmission quality, interface adopts general RJ45, perhaps standard interface such as 568A, 568B.
Building visual intercom system of the present invention is utilized twisted-pair line transmission video signal; And realized the autoband coupling of signal through the adaptive balance module in the networking isolator; The system that makes can satisfy the request signal transmission of different distance between signal sending end and the receiving terminal adaptively; Can be easily with video signal transmission to 2000m distance and keep the good signal quality; Not only reached vision signal high-quality, low cost, transmission at a distance, and, can further meet the need of market for practice of construction, debugging and later maintenance have brought convenience.
Further, the building visual intercom system of this execution mode is in the networking process, and signal transmission can realize AC coupled and multiple spot power supply through the fool proof design, can effectively avoid the influence of being struck by lightning, the stability of raising system; In addition; Note also the impedance matching of signal in the actual sets network process; Because the characteristic impedance of twisted-pair feeder is 100～200 ohm; Shown in this execution mode can carry out corresponding impedance matching according to the input characteristics of each chip and the transmission characteristic of transmission wire rod, can effectively suppress with the absorption signal reflection to influence that signal quality caused.
Above content is to combine concrete execution mode to the further explain that the present invention did, and can not assert that practical implementation of the present invention is confined to these explanations.For the those of ordinary skill of technical field under the present invention, under the prerequisite that does not break away from the present invention's design, can also make some simple deduction or replace, all should be regarded as belonging to protection scope of the present invention.
Claims (10)
1. building visual intercom system; Comprise management equipment, floor splitter, have video display indoor set, have the ladder-port machine of video monitor; Said floor splitter is connected with the indoor set signal; It is characterized in that also comprise at least one networking isolator, said networking isolator is connected between said floor splitter, management equipment, the ladder-port machine through the twisted-pair feeder signal; Be provided for the composite video broadcast singal is converted to the differential signal driver module of differential signal in the said ladder-port machine; Be provided for differential signal is converted to the differential signal processing module of composite video broadcast singal in the said floor splitter, be provided for the differential signal from said ladder-port machine is carried out transferring to after the self-adaptive processing adaptive balance module of management equipment in the said networking isolator.
2. the system of claim 1; It is characterized in that; Also comprise the enclosure wall machine that has video monitor; Said enclosure wall machine is connected with said networking isolator signal through twisted-pair feeder, also is provided for the composite video broadcast singal is converted to the differential signal driver module of differential signal in the said enclosure wall machine; Said adaptive balance module also is used for the differential signal from said enclosure wall machine is carried out transferring to said management equipment and/or floor splitter after the self-adaptive processing.
3. the system of claim 1 is characterized in that, said management equipment comprises PC transducer and PC supervisor, and said PC transducer signal is connected between said networking isolator and the PC supervisor.
4. the system of claim 1 is characterized in that, said management equipment comprises general supervisor, is provided for the differential signal conversion module that realizes that conversion of composite video broadcast singal and differential signal are changed in the said general supervisor.
5. like each described system in the claim 1 to 4, it is characterized in that said differential signal driver module comprises that model is the differential twisted pair driver of EL5171.
6. like each described system in the claim 1 to 4, it is characterized in that said adaptive balance module comprises adaptive equalizer and the corresponding differential twisted pair driver that is connected with said adaptive equalizer.
7. system as claimed in claim 6 is characterized in that, the model of adaptive equalizer is ISL59605.
8. system as claimed in claim 6 is characterized in that, the model of differential twisted pair driver is EL5171.
9. like each described system in the claim 1 to 4, it is characterized in that said differential signal processing module comprises that model is the feedback amplifier of EL2480.
10. like each described system in the claim 1 to 4, it is characterized in that the model of said twisted-pair feeder is CAT-5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110047607A CN102118609B (en) | 2011-02-28 | 2011-02-28 | Building visual intercom system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110047607A CN102118609B (en) | 2011-02-28 | 2011-02-28 | Building visual intercom system |
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| CN102118609A CN102118609A (en) | 2011-07-06 |
| CN102118609B true CN102118609B (en) | 2012-10-03 |
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| CN201110047607A Expired - Fee Related CN102118609B (en) | 2011-02-28 | 2011-02-28 | Building visual intercom system |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102316312A (en) * | 2011-10-19 | 2012-01-11 | 绵阳灵通电讯设备有限公司 | Video transmission method of building intercom system |
| CN103067694A (en) * | 2012-12-29 | 2013-04-24 | 福建省冠林科技有限公司 | Visual doorphone system with video record function |
| CN106506873B (en) * | 2016-09-30 | 2019-05-17 | 深圳市泛海三江电子股份有限公司 | Two-bus transmission device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4656652A (en) * | 1983-12-16 | 1987-04-07 | Kyoichi Nagai | Emergency warning device for use in a party line telephone system or the like |
| CN2636549Y (en) * | 2003-08-14 | 2004-08-25 | 深圳市松本先天下科技发展有限公司 | Indoor apparatus of storied building talk back and information system |
| CN2694678Y (en) * | 2003-06-19 | 2005-04-20 | 钟忠明 | Building visible intercommunication apparatus |
| CN201127085Y (en) * | 2007-12-05 | 2008-10-01 | 谢洲云 | Visible building intercommunication mainframe |
| CN201947400U (en) * | 2011-02-28 | 2011-08-24 | 深圳市泛海三江电子有限公司 | Building visible intercom system |
-
2011
- 2011-02-28 CN CN201110047607A patent/CN102118609B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4656652A (en) * | 1983-12-16 | 1987-04-07 | Kyoichi Nagai | Emergency warning device for use in a party line telephone system or the like |
| CN2694678Y (en) * | 2003-06-19 | 2005-04-20 | 钟忠明 | Building visible intercommunication apparatus |
| CN2636549Y (en) * | 2003-08-14 | 2004-08-25 | 深圳市松本先天下科技发展有限公司 | Indoor apparatus of storied building talk back and information system |
| CN201127085Y (en) * | 2007-12-05 | 2008-10-01 | 谢洲云 | Visible building intercommunication mainframe |
| CN201947400U (en) * | 2011-02-28 | 2011-08-24 | 深圳市泛海三江电子有限公司 | Building visible intercom system |
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