CN205681565U - A kind of interface circuit for extending non-visual extension set and building conversational system - Google Patents
A kind of interface circuit for extending non-visual extension set and building conversational system Download PDFInfo
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- CN205681565U CN205681565U CN201620545970.4U CN201620545970U CN205681565U CN 205681565 U CN205681565 U CN 205681565U CN 201620545970 U CN201620545970 U CN 201620545970U CN 205681565 U CN205681565 U CN 205681565U
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Abstract
A kind of interface circuit for extending non-visual extension set and building conversational system, interface circuit is for connecting the video intercom as the machine and the non-visual extension set as extension set, including: first interface, for forwarding the alarm signal of extension set, audio input signal, off hook signal, unlocking signal, and for the power supply of the machine, the audio output signal of the machine are transferred to extension set；Off-hook and unlocking signal pretreatment circuit, connect first interface, and for triggering port with the off-hook of local controller, triggering port of unblanking is connected, and is sent to local controller to trigger off-hook or the process unblanked after off hook signal and unlocking signal are carried out pretreatment；Alarm signal pretreatment circuit, connects first interface, is connected for triggering port with the warning of local controller, is sent to local controller to trigger warning after alarm signal is carried out pretreatment.This utility model directly can expand non-visual extension set on the basis of video intercom, and supports flash appeal function.
Description
Technical field
This utility model relates to building talkback field, particularly relate to a kind of interface circuit for extending non-visual extension set with
And building conversational system.
Background technology
Building talkback is the basic security safeguards system that current all new residential areas necessarily require to be equipped with, to opening in the past
The residential quarters sent out, public security technical precaution department is also supervising Property Management of residence transformation to install building conversational system additional.Building speakerphone
Functionally can simply be divided into non-video intercom and the big class of video intercom two, non-video intercom is used in low and middle-end mostly
In residential quarters, and video intercom is used mostly in residential quarters, middle and high end.In order to realize the profit the most again of existing resource
With, it is sometimes necessary to existing non-video intercom and video intercom are combined, it is necessary to provide that one connects
Mouth circuit.
Utility model content
The technical problems to be solved in the utility model is, for the drawbacks described above of prior art, it is provided that one is used for expanding
Open up interface circuit and the building conversational system of non-visual extension set.
This utility model solves its technical problem and be the technical scheme is that structure is a kind of for extending non-visual extension set
Interface circuit, for connecting the video intercom as the machine and the non-visual extension set as extension set, described interface circuit bag
Include:
First interface, for forwarding the alarm signal of extension set, audio input signal, off hook signal, unlocking signal, Yi Jiyong
In the audio output signal of the power supply of the machine, the machine is transferred to extension set；
Off-hook and unlocking signal pretreatment circuit, connect described first interface, triggers for the off-hook with local controller
Port, triggering port of unblanking connect, and are sent to local controller after described off hook signal and unlocking signal are carried out pretreatment
To trigger off-hook or the process unblanked；
Alarm signal pretreatment circuit, connects described first interface, for triggering port even with the warning of local controller
Connect, be sent to local controller after described alarm signal is carried out pretreatment to trigger warning.
In the interface circuit for extending non-visual extension set described in the utility model, described first interface includes four
Terminal:
First terminal, is used for the power supply transfer of the machine to extension set, and forwards described audio input signal, off-hook to believe
Number, unlocking signal；
Second terminal, for transferring described audio output signal to extension set；
3rd terminal, for forwarding the alarm signal of extension set；
4th terminal, for transferring the reference of the machine to extension set；
Described interface circuit also include one isolation circuit, described isolation circuit connect first interface first terminal with
Off-hook and unlocking signal pretreatment circuit and the audio input circuit of the machine, for by audio input signal, off hook signal, open
Lock signal is separated, and is sent by audio input signal to audio input circuit, sends off hook signal, unlocking signal to plucking
Machine and unlocking signal pretreatment circuit.
In the interface circuit for extending non-visual extension set described in the utility model, described isolation circuit includes one
For capacitance and the isolation resistance being used for isolating exchange of isolated DC, described capacitance connects first end
Son and the audio input circuit of the machine, described isolation resistance connects first terminal and off-hook and unlocking signal pretreatment circuit.
In the interface circuit for extending non-visual extension set described in the utility model, described off-hook and unlocking signal are pre-
Process circuit includes: the first comparator, the second comparator, off-hook reference voltage circuit, reference voltage circuit of unblanking, the first protection
Diode, the second protection diode；
The positive input terminal of the first comparator connects off-hook reference voltage circuit, and the negative input end of the first comparator is by described
Isolation resistance connects first terminal of first interface, and the outfan of the first comparator connects the negative pole of the first protection diode,
The positive pole of the first protection diode triggers port for the off-hook connecting local controller；
The positive input terminal of the second comparator connects reference voltage circuit of unblanking, and the negative input end of the second comparator is by described
Isolation resistance connects first terminal of first interface, and the outfan of the second comparator connects the negative pole of the second protection diode,
The positive pole of the second protection diode is for connecting the triggering port of unblanking of local controller.
In the interface circuit for extending non-visual extension set described in the utility model,
Power supply that described off-hook reference voltage circuit includes being serially connected in the machine and with reference to the first divider resistance between ground and
The negative input end connecting node and the first comparator of the second divider resistance, the first divider resistance and the second divider resistance connects；
Power supply that described reference voltage circuit of unblanking includes being serially connected in the machine and with reference to the 3rd divider resistance between ground and
The negative input end connecting node and the second comparator of the 4th divider resistance, the 3rd divider resistance and the 4th divider resistance connects.
In the interface circuit for extending non-visual extension set described in the utility model, described first terminal passes through one
Individual pull-up resistor is connected to the power supply of the machine.
In the interface circuit for extending non-visual extension set described in the utility model, described alarm signal pretreatment electricity
Road includes: the first resistance, filter capacitor and Zener diode, and the first end of the first resistance connects the 3rd end of first interface
Son, the second end of the first resistance passes through filter capacitor ground connection, and the second end of the first resistance is additionally coupled to the negative pole of Zener diode,
The plus earth of Zener diode, the second end of the first resistance is additionally operable to connect the warning of described local controller and triggers port.
The invention also discloses a kind of building conversational system, including the non-visual extension set as extension set with as the machine
Video intercom, also include described interface circuit.
Implement the interface circuit for extending non-visual extension set of the present utility model and building conversational system, have following
Beneficial effect: interface circuit of the present utility model directly can expand non-visual extension set, and electricity on the basis of video intercom
Road is simple, cheap, safe and reliable, and the machine also can take over the process of the alarm signal to extension set, it is achieved support promptly to ask
Assist energy.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is described in further detail, in accompanying drawing:
Fig. 1 is that this utility model is for extending the structural representation of the interface circuit of non-visual extension set.
Detailed description of the invention
In order to be more clearly understood from technical characteristic of the present utility model, purpose and effect, now comparison accompanying drawing is detailed
Detailed description of the invention of the present utility model is described.
As it is shown in figure 1, be that this utility model is for extending the structural representation of the interface circuit of non-visual extension set.
Interface circuit of the present utility model, for connecting video intercom as the machine and as extension set non-visual point
Machine, specifically includes that
First interface J1, for forwarding the alarm signal of extension set, audio input signal, off hook signal, unlocking signal, and
For the audio output signal of the power supply of the machine, the audio output circuit of the machine is transferred to extension set；
Alarm signal pretreatment circuit 20, connects described first interface J1, triggers end for the warning with local controller
Mouth connects, and is sent to local controller to trigger warning after described alarm signal is carried out pretreatment；
Off-hook and unlocking signal pretreatment circuit 10, connect described first interface J1, for the off-hook with local controller
Trigger port, unblank to trigger port connection, after described off hook signal and unlocking signal are carried out pretreatment, be sent to the machine control
Device processed is to trigger off-hook or the process unblanked.
In figure, A node represents the node that the audio input circuit with the machine is connected, for receiving the audio frequency input letter of forwarding
Number；In figure, B node represents the node that the audio output circuit with local controller is connected, and is used for exporting audio output signal；Figure
What middle C node represented triggers, with reporting to the police of local controller, the node that port is connected；In figure, D node represents and local controller
Off-hook triggers the node that port connects；In figure, E node represents the node that the triggering port of unblanking with local controller is connected.
Wherein, the signal that first interface J1 can just be forwarded provides corresponding terminal respectively, however, it is preferred to, in order to
Improve the utilization rate of terminal, this utility model has shared a terminal for several signals therein.Concrete, such as Fig. 1 institute
In the embodiment shown, described first interface J1 includes four terminals:
First terminal, is used for the power supply transfer of the machine to extension set, and forwards described audio input signal, off-hook to believe
Number, unlocking signal；
Second terminal, for transferring described audio output signal to extension set；
3rd terminal, for forwarding the alarm signal of extension set；
4th terminal, for transferring the reference of the machine to extension set；
Visible first terminal has been transferred several signal simultaneously, in order to by these several Signal separator, accordingly, described interface
Circuit also includes an isolation circuit 30, and described isolation circuit 30 connects first terminal of first interface J1 and off-hook and unblanks
Signal pre-processing circuit 10 and the audio input circuit of the machine, for dividing audio input signal, off hook signal, unlocking signal
Separate out, and audio input signal is sent to audio input circuit, off hook signal, unlocking signal are sent to off-hook and unblank
Signal pre-processing circuit 10.
During use, first interface J1 is connected with non-visual extension set by 4 core copper cash, concrete: first terminal and dividing
The microphone of machine connects to obtain audio input signal, and first terminal is also connected with the power source reference point of extension set, with to whole point
Machine provides power supply, first terminal to be also connected with generation off hook signal, the button of unlocking signal；Second terminal is raised with extension set
Sound device or receiver connect；3rd terminal is connected with the flash appeal button of the generation alarm signal of extension set；4th terminal
Reference with extension set it is connected.
Visible, in the present embodiment, first terminal is four kinds of signals of having transferred: power supply signal, audio input signal, off-hook
Signal, unlocking signal.It should be explicitly made clear at this point, this four kinds of signals both can utilize same terminal to transfer, it is also possible to first
Interface J1 is any two kinds of signals therein or any three kinds of signals or one terminal of each self-configuring of each signal, these
All it is belonging to the scheme deformation of the present embodiment, all within protection domain of the present utility model.
With continued reference to Fig. 1, concrete:
Described first terminal is connected to the power supply of the machine by a pull-up resistor R1.
Described isolation circuit 30 includes: one for the capacitance C1 of isolated DC and one for isolating exchange
Isolation resistance R2, described capacitance C1 connect first terminal and the audio input circuit of the machine, and described isolation resistance R2 is even
Connect first terminal and off-hook and unlocking signal pretreatment circuit 10.
Described off-hook and unlocking signal pretreatment circuit 10 include: the first comparator, the second comparator, off-hook reference voltage
Circuit, reference voltage circuit of unblanking, the first protection diode D1, the second protection diode D2；
The positive input terminal of the first comparator connects off-hook reference voltage circuit, and the negative input end of the first comparator is by described
Isolation resistance R2 connects first terminal of first interface J1, and the outfan of the first comparator connects the first protection diode D1's
Negative pole, the positive pole of the first protection diode D1 triggers port for the off-hook connecting local controller；
The positive input terminal of the second comparator connects reference voltage circuit of unblanking, and the negative input end of the second comparator is by described
Isolation resistance R2 connects first terminal of first interface J1, and the outfan of the second comparator connects the second protection diode D2's
Negative pole, the positive pole of the second protection diode D2 is for connecting the triggering port of unblanking of local controller.
The off-hook of local controller triggers port and unblanks to trigger port all each via a pull-up resistor connection 3.3V
Power supply, the high level that the first comparator and the second comparator are exported is 12V.So when the first comparator/the second is compared
During device output high level, the first protection diode D1/ second protects diode D2 to end, then off-hook triggering port/unblank to touch
The level of mouth of making a start is high level；And when the first comparator/the second comparator output low level, the first protection diode
D1/ second protects diode D2 to turn on, and off-hook triggers port/triggering Port detecting of unblanking to low level.
In specific embodiment, the first comparator, the second comparator are that the twin voltage comparator integrated chip U1 utilized realizes,
Such as model is LM393.
The positive input terminal of the first comparator of twin voltage comparator integrated chip U1, negative input end, outfan correspondence respectively
3,2, No. 1 pin for twin voltage comparator integrated chip U1.Second comparator of twin voltage comparator integrated chip U1 is just
Input, negative input end, outfan correspond to 5,6, No. 7 pins of twin voltage comparator integrated chip U1 respectively.Twin voltage ratio
No. 8 pins compared with device integrated chip U1 connect power supply, No. 4 pin ground connection, connect electric capacity C2 between No. 4 pins and No. 6 pins.
Wherein, described off-hook reference voltage circuit includes the power supply being serially connected in the machine and with reference to the first dividing potential drop electricity between ground
The connection node of resistance R3 and the second divider resistance R4, the first divider resistance R3 and the second divider resistance R4 and bearing of the first comparator
Input connects；Described reference voltage circuit of unblanking includes the power supply being serially connected in the machine and with reference to the 3rd divider resistance between ground
R5 and the 4th divider resistance R6, the 3rd divider resistance R5 and the 4th divider resistance R6 connect the negative defeated of node and the second comparator
Enter end to connect.In figure, the level connecting node of the first divider resistance R3 and the second divider resistance R4 is off-hook datum F,
The level connecting node of the 3rd divider resistance R5 and the 4th divider resistance R6 is the datum G that unblanks.
Wherein, described alarm signal pretreatment circuit 20 includes: the first resistance R7, filter capacitor C4 and Zener diode
First end of D3, the first resistance R7 connects the 3rd terminal of first interface J1, and second end of the first resistance R7 passes through filtered electrical
Holding C4 ground connection, second end of the first resistance R7 is additionally coupled to the negative pole of Zener diode D3, the plus earth of Zener diode D3,
Second end of the first resistance R7 is additionally operable to connect the warning of described local controller and triggers port.Zener diode in the present embodiment
The Zener diode of the 3.6V that D3 uses.
Below in conjunction with Fig. 1, introduce operation principle of the present utility model as follows:
1), the power supply VCC of the machine 1 foot by R1, J1, provide power supply to non-visual extension set.Meanwhile, non-visual extension set
The audio input circuit that the audio input signal of microphone output is input to the machine by 1 foot of J1, C1 carries out audio frequency amplification.
2), the audio output signal of the machine is connected to the speaker of non-visual extension set by the 2nd foot of J1, it is achieved ring and
Speech talkback.
3) the flash appeal button signal, on non-visual extension set, after the 3rd foot of J1, R7, then through C4 filtering, D3
The warning being input to local controller after voltage stabilizing triggers port.When the flash appeal button on non-visual extension set triggers, this report
The alert level triggering port will be become low level from high level, and microprocessor performs flash appeal after the change of this level being detected
Relative program.
4) DC voltage, on the 1st foot of J1, is connected to the negative input end (the 2nd foot of U1) of the first comparator by R2
Negative input end (the 6th foot of U1) with the second comparator.The positive input terminal (the 3rd foot of U1) of the first comparator connects off-hook with reference to electricity
Flat F, this level is formed by R3, R4 dividing potential drop, usually about the 65% of VCC.The positive input terminal (the 5th foot of U1) of the second comparator
Meeting the datum G that unblanks, this level is formed by resistance R5, R6 dividing potential drop, usually about the 30% of VCC.First comparator defeated
Going out end (the 1st foot of U1) and connect the negative pole of D1, the positive pole of D1 connects the off-hook of local controller and triggers port, the output of the second comparator
End (the 7th foot of U1) connects the negative pole of D2, and the positive pole of D2 connects the triggering port of unblanking of local controller.When non-visual extension set off-hook
Time, the level on the 1st foot of J1 is higher than the datum G (0.3VCC) that unblanks less than off-hook datum F (0.65VCC), this
Time local controller off-hook trigger port level uprised by low, but local controller unblank trigger port level still
Maintain low level, after local controller detects this change, i.e. perform off-hook relative program.When non-visual extension set is unblanked,
Level on 1st foot of J1 is less than unblanking datum G (0.3VCC), and at this moment off-hook triggers the level of port and unblanks to trigger end
The level of mouth is all high level, and after local controller detects this change, i.e. perform to unblank relative program.
Accordingly, the invention also discloses a kind of building conversational system, including as extension set non-visual extension set and
As the video intercom of the machine, also include interface circuit as above.
In sum, the interface circuit for extending non-visual extension set of the present utility model and building talkback system are implemented
System, have the advantages that interface circuit of the present utility model can directly expand on the basis of video intercom non-can
Depending on extension set, and circuit is simple, cheap, safe and reliable, and the machine also can take over the process of the alarm signal to extension set, it is achieved
Support flash appeal function.
Above in conjunction with accompanying drawing, embodiment of the present utility model is described, but on this utility model is not limited to
The detailed description of the invention stated, above-mentioned detailed description of the invention is only schematic rather than restrictive, this area common
Technical staff is under enlightenment of the present utility model, without departing from this utility model objective and scope of the claimed protection situation
Under, it may also be made that a lot of form, within these belong to protection of the present utility model.
Claims (8)
1. for extending an interface circuit for non-visual extension set, for connecting as the video intercom of the machine with as extension set
Non-visual extension set, it is characterised in that described interface circuit includes:
First interface (J1), for forwarding the alarm signal of extension set, audio input signal, off hook signal, unlocking signal, Yi Jiyong
In the audio output signal of the power supply of the machine, the machine is transferred to extension set；
Off-hook and unlocking signal pretreatment circuit (10), connect described first interface (J1), for the off-hook with local controller
Trigger port, unblank to trigger port connection, after described off hook signal and unlocking signal are carried out pretreatment, be sent to the machine control
Device processed is to trigger off-hook or the process unblanked；
Alarm signal pretreatment circuit (20), connects described first interface (J1), triggers end for the warning with local controller
Mouth connects, and is sent to local controller to trigger warning after described alarm signal is carried out pretreatment.
Interface circuit for extending non-visual extension set the most according to claim 1, it is characterised in that described first interface
(J1) four terminals are included:
First terminal, for by the power supply transfer of the machine to extension set, and forward described audio input signal, off hook signal,
Unlocking signal；
Second terminal, for transferring described audio output signal to extension set；
3rd terminal, for forwarding the alarm signal of extension set；
4th terminal, for transferring the reference of the machine to extension set；
Described interface circuit also includes isolation circuit (30), and described isolation circuit (30) connects the first of first interface (J1)
Individual terminal and off-hook and unlocking signal pretreatment circuit (10) and the audio input circuit of the machine, for by audio frequency input letter
Number, off hook signal, unlocking signal separate, and by audio input signal send to audio input circuit, by off hook signal, open
Lock signal sends to off-hook and unlocking signal pretreatment circuit (10).
Interface circuit for extending non-visual extension set the most according to claim 2, it is characterised in that described isolation circuit
(30) capacitance for isolated DC (C1) and an isolation resistance (R2) being used for isolating exchange are included, described
Capacitance (C1) connects first terminal and the audio input circuit of the machine, the described isolation resistance (R2) of first interface (J1)
Connect first terminal and off-hook and unlocking signal pretreatment circuit (10) of first interface (J1).
Interface circuit for extending non-visual extension set the most according to claim 3, it is characterised in that described off-hook and opening
Lock signal pretreatment circuit (10) including: the first comparator, the second comparator, off-hook reference voltage circuit, reference voltage of unblanking
Circuit, the first protection diode (D1), the second protection diode (D2)；
The positive input terminal of the first comparator connects off-hook reference voltage circuit, and the negative input end of the first comparator is by described isolation
Resistance (R2) connects first terminal of first interface (J1), and the outfan of the first comparator connects the first protection diode (D1)
Negative pole, first protection diode (D1) positive pole for connect local controller off-hook trigger port；
The positive input terminal of the second comparator connects reference voltage circuit of unblanking, and the negative input end of the second comparator is by described isolation
Resistance (R2) connects first terminal of first interface (J1), and the outfan of the second comparator connects the second protection diode (D2)
Negative pole, second protection diode (D2) positive pole for connect local controller unblank trigger port.
Interface circuit for extending non-visual extension set the most according to claim 4, it is characterised in that
Power supply that described off-hook reference voltage circuit includes being serially connected in the machine and with reference to the first divider resistance (R3) between ground and
The connection node of the second divider resistance (R4), the first divider resistance (R3) and the second divider resistance (R4) and bearing of the first comparator
Input connects；
Power supply that described reference voltage circuit of unblanking includes being serially connected in the machine and with reference to the 3rd divider resistance (R5) between ground and
The connection node of the 4th divider resistance (R6), the 3rd divider resistance (R5) and the 4th divider resistance (R6) and bearing of the second comparator
Input connects.
Interface circuit for extending non-visual extension set the most according to claim 2, it is characterised in that first interface (J1)
First terminal be connected to the power supply of the machine by pull-up resistor (R1).
Interface circuit for extending non-visual extension set the most according to claim 1, it is characterised in that described alarm signal
Pretreatment circuit (20) including: the first resistance (R7), filter capacitor (C4) and Zener diode (D3), the of the first resistance (R7)
One end connects the 3rd terminal of first interface (J1), and the second end of the first resistance (R7) passes through filter capacitor (C4) ground connection, the
Second end of one resistance (R7) is additionally coupled to the negative pole of Zener diode (D3), the plus earth of Zener diode (D3), and first
Second end of resistance (R7) is additionally operable to connect the warning of local controller and triggers port.
8. a building conversational system, including the non-visual extension set as extension set and the video intercom as the machine, its feature
It is, also includes the interface circuit as described in any one of claim 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620545970.4U CN205681565U (en) | 2016-06-07 | 2016-06-07 | A kind of interface circuit for extending non-visual extension set and building conversational system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620545970.4U CN205681565U (en) | 2016-06-07 | 2016-06-07 | A kind of interface circuit for extending non-visual extension set and building conversational system |
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| Publication Number | Publication Date |
|---|---|
| CN205681565U true CN205681565U (en) | 2016-11-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201620545970.4U Active CN205681565U (en) | 2016-06-07 | 2016-06-07 | A kind of interface circuit for extending non-visual extension set and building conversational system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109495710A (en) * | 2018-12-07 | 2019-03-19 | 广州市金戈智能工程有限公司 | Visual talk back entrance guard system |
-
2016
- 2016-06-07 CN CN201620545970.4U patent/CN205681565U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109495710A (en) * | 2018-12-07 | 2019-03-19 | 广州市金戈智能工程有限公司 | Visual talk back entrance guard system |
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