CN106982360B - Intercom system and its doorway machine - Google Patents
Intercom system and its doorway machine Download PDFInfo
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- CN106982360B CN106982360B CN201710295272.2A CN201710295272A CN106982360B CN 106982360 B CN106982360 B CN 106982360B CN 201710295272 A CN201710295272 A CN 201710295272A CN 106982360 B CN106982360 B CN 106982360B
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- doorway machine
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- extension set
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- mcu
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
- H04N7/183—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast for receiving images from a single remote source
- H04N7/186—Video door telephones
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/0291—Door telephones
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
- H04M11/02—Telephonic communication systems specially adapted for combination with other electrical systems with bell or annunciator systems
- H04M11/025—Door telephones
Abstract
The present invention relates to a kind of intercom system and its doorway machine, doorway machine includes: audio transmission device, MCU, calling device, multiple channel switching devices and multiple power detectors；The calling device, the audio transmission device, the multiple channel switching device and the multiple power detector are connected with the MCU respectively, the calling device and audio transmission device are separately connected the sound bus of doorway machine, the sound bus of the doorway machine is connected with each channel switching device respectively, sound bus of each channel switching device respectively with each extension set of intercom system is correspondingly connected with, and power bus of each power detector respectively with each extension set of intercom system is correspondingly connected with.Above-mentioned intercom system and its doorway machine can reduce system wiring, and without using intermediate equipment, at low cost.
Description
Technical field
The present invention relates to video intercom technical fields, more particularly to a kind of intercom system and its doorway machine.
Background technique
Intercom system is the Residential Area service measures of a set of modernization, provides two-way call between visitor and resident, reaches
To speech recognition to improve security reliability, while a large amount of time is saved, improved work efficiency.
In traditional more house type building conversational systems, a doorway machine is connected with the extension set of each resident respectively, is
Each family extension set sound line is isolated, and prevents the signal of different residents from interfering with each other, and generally by multiple-way system and is increased intermediate
Equipment realizes from doorway machine to the connection each extension set, at least needed in intercom system power supply line, ground wire, video line,
Tone frequency channel wire and call circuit, cost of implementation are relatively high.
Summary of the invention
Based on this, it is necessary to for the relatively high problem of traditional building conversational system cost of implementation, provide a kind of intercommunication
System and its doorway machine.
A kind of doorway machine of intercom system, comprising:
Audio transmission device, MCU, calling device, multiple channel switching devices and multiple power detectors；
The calling device, the audio transmission device, the multiple channel switching device and the multiple power detecting
Device is connected with the MCU respectively, and the calling device and audio transmission device are separately connected the sound bus of doorway machine, institute
The sound bus for stating doorway machine is connected with each channel switching device respectively, each channel switching device respectively with intercom system
The sound bus of each extension set be correspondingly connected with, each power detector is total with the power supply of each extension set of intercom system respectively
Line is correspondingly connected with；
The MCU controls corresponding channel switching device conducting, by doorway machine after detecting that intended extension is selected
Sound bus be connected with the sound bus of intended extension；
The calling device sends call signal to the sound bus of intended extension by the channel switching device of conducting；
The power detector receives the call-connected signal that the intended extension responds the call signal output, right
The call-connected signal carries out level detection, and the first testing result is sent to MCU；
The MCU starts audio transmission device according to first testing result, opens intercommunication state.
A kind of intercom system, comprising:
Doorway machine；And
The multiple extension sets being connected respectively with the doorway machine；
Wherein, the sound bus of the doorway machine passes through the sound bus of each channel switching device and each extension set respectively
It is correspondingly connected with, power bus of each power detector of the doorway machine respectively with each extension set is correspondingly connected with, the door
The earth bus of mouthful machine and the earth bus of each extension set are grounded, the video frequency transmitter of the doorway machine respectively with each extension set
Video bus be connected, each extension set is connected with corresponding power supply respectively.
Above-mentioned intercom system and its doorway machine control corresponding channel switching device conducting when intended extension is selected,
So that calling device is sent call signal to intended extension by the channel switching device of conducting, after intended extension connection, passes through
Corresponding power bus exports call-connected signal to power detector, power detector to the call-connected signal into
Line level detection, and the first testing result is sent to MCU, MCU starts audio transmission device according to the first testing result, opens
Intercommunication state can reduce system cloth by making the signal of calling device and audio transmission device pass through sound bus transfer
Line connects corresponding extension set by channel switching device, the signal of different extension sets can be isolated, and sets without using centre
It is standby, to reduce system cost.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the doorway machine of the intercom system of first embodiment；
Fig. 2 is the structural schematic diagram of the doorway machine of the intercom system of second embodiment；
Fig. 3 is the circuit structure diagram of the channel switching device of one embodiment；
Fig. 4 is the circuit structure diagram of the calling device of one embodiment；
Fig. 5 is the circuit structure diagram of the power detector of one embodiment；
Fig. 6 is the structural schematic diagram of the intercom system of one embodiment.
Specific embodiment
Technical solution of the present invention is illustrated with reference to the accompanying drawing.
As shown in Figure 1, the present embodiment provides a kind of doorway machines of intercom system, it may include:
Audio transmission device, MCU (Micro Controller Unit, micro-control unit), calling device, multiple channels
Switching device and multiple power detectors；
The calling device, the audio transmission device, the multiple channel switching device and the multiple power detecting
Device is connected with the MCU respectively, and the calling device and audio transmission device are separately connected the sound bus of doorway machine, institute
The sound bus for stating doorway machine is connected with each channel switching device respectively, each channel switching device respectively with intercom system
The sound bus of each extension set be correspondingly connected with, each power detector is total with the power supply of each extension set of intercom system respectively
Line is correspondingly connected with；
The MCU controls corresponding channel switching device conducting, by doorway machine after detecting that intended extension is selected
Sound bus be connected with the sound bus of intended extension；
The calling device sends call signal to the sound bus of intended extension by the channel switching device of conducting；
The power detector receives the call-connected signal that the intended extension responds the call signal output, right
The call-connected signal carries out level detection, and the first testing result is sent to MCU；
The MCU starts audio transmission device according to first testing result, opens intercommunication state.
Wherein, the call-connected signal can be voltage signal.
The structure that can connect the doorway machine of 4 extension sets is shown in Fig. 1, but the present invention is not limited thereto, company, doorway machine institute
The extension set quantity connect can be set according to actual needs.In figure, F1_P, F2_P, F3_P, F4_P respectively indicate extension set 1 to extension set 4
Power bus, F1_S, F2_S, F3_S, F4_S respectively indicate the sound bus of extension set 1 to extension set 4.The intercom system of the present embodiment
It can be building conversational system, doorway machine therein can be the doorway machine in building conversational system, mountable in building gate inhibition
Place.In one embodiment, MCU can be connected with switching devices such as keys, key may be provided at building gate inhibition (for example,
On wall or building gate), settable multiple keys, the corresponding extension set of each key.When work, doorway machine can detect key
State, when detecting by key pressing, MCU can determine that the corresponding intended extension of the key is selected.
In one embodiment, as shown in Fig. 2, the doorway machine of intercom system of the invention may also include transmission of video dress
It sets；The video frequency transmitter is connected with the MCU, and is connected respectively with the video bus of each extension set；The MCU is also
Video frequency transmitter can be started according to first testing result, open video intercom state.By using video frequency transmitter,
In conjunction with above-mentioned audio transmission device, the intercom system of the present embodiment can realize video intercom, be capable of providing between visitor and resident
Bidirectional visual call reaches the dual identification of image, voice to further increase security reliability.The doorway machine can by pair
The Wiring port connection extension set answered, Wiring port may include sound bus interface, power bus interface and earth bus interface, can
Selection of land further includes video bus interface.The sound bus interface that the channel selection device of doorway machine passes through corresponding Wiring port connects
Each extension set is connect, the power bus interface that the power detector of doorway machine passes through corresponding Wiring port connects each extension set, respectively
A extension set passes through the earth bus interfacing ground of corresponding Wiring port, and optionally, the video frequency transmitter of doorway machine also passes through pair
The video bus interface of Wiring port is answered to connect each extension set.F1_V, F2_V, F3_V, F4_V respectively indicate video bus in figure,
X1, X2, X3, X4 respectively indicate the corresponding Wiring port of each extension set, and 1,2,3,4 in Wiring port respectively indicate video bus
Interface, earth bus interface, power bus interface and sound bus interface.Video frequency transmitter may include that camera and video are put
Big device, camera is mountable at gate inhibition, and by the video amplifier respectively with the video bus phase of each extension set
Connection；Vision signal at the camera acquisition gate inhibition, and it is sent to video amplifier；The video amplifier is to institute
It states and exports after vision signal amplifies to corresponding extension set.In a further embodiment, the video frequency transmitter may be used also
Including the light compensating lamp device being connected with camera.
In one embodiment, the video frequency transmitter can also realize the monitoring to doorway machine.At corresponding extension set
When monitor state, video frequency transmitter can pass through corresponding video bus point according to the quantity to the extension set under monitor state
It Shu Chu not be to each extension set.Video amplification chip realization can be used in the video amplifier.At least one in each extension set
When person monitors doorway machine, power detector can receive the prison that the extension set of monitoring doorway machine is sent by corresponding power bus
Depending on signal；Level detection is carried out to the monitoring signal, and the second testing result is sent to MCU；MCU can be according to described
Two testing results start video frequency transmitter, open monitored state.Further, if the MCU receives second detection
As a result, and to be not detected intended extension in the preset time period before receiving second testing result selected, can be with
Only start video frequency transmitter, without starting audio transmission device.
Optionally, the intercom system of one embodiment may also include unlocking apparatus；The unlocking apparatus passes through doorway machine
Sound bus is connected with each channel switching device respectively；When unlocking, the unlocking apparatus receives the intended extension and passes through
The unlocking signal that corresponding sound bus is sent, and respond the unlocking signal opening gate lock.After unlocking, extension set can be hung
Machine.In the intended extension on-hook, it is defeated by corresponding power bus that power detector can receive the intended extension
On-hook signal out；Level detection is carried out to the on-hook signal, and third testing result is sent to MCU；MCU can connect
After receiving the third testing result, the monitoring signal of each extension set is detected；It, can be only if detecting monitoring signal
Audio transmission device is closed, video frequency transmitter is kept to open；If monitoring signal is not detected, can by video frequency transmitter and
Audio transmission device is all closed.
The realization of 4 line systems can be used in the doorway machine of above-mentioned intercom system, and each extension set can correspond to different residents, to realize more
4 line storied building visible intercommunication system of house type, each family extension set effectively carry out independent differentiation, and doorway machine one calls the corresponding family point of key
Machine.Each family extension set sound bus can be effectively isolated by channel switching device, protection system call privacy, each extension set sound
Anti-interference ability and transporting can be more preferable after the isolation of sound line.Doorway machine in the case of more 4 line systems of house type to monitoring signal and can exhale
It makes signal distinguish, in more families, calling, monitoring crossover operation, guarantees doorway machine to the call state and prison of each family extension set
It is not interfered with each other depending on state and system perturbations is caused to operate.In one embodiment, the priority of call signal can be set as most
Advanced, the also settable extension set only under video intercom state can just carry out extension set remote-control unlocking, increase safety.With other
More house type multiple-way system visual-speaking systems are compared, and for extension set without coding settings, it is intermediate without increasing that doorway machine is directly connected to extension set
Equipment, wiring is simpler, and cost is lower, and the independently installed operability of resident is stronger.
In a specific embodiment, as shown in figure 3, the channel switching device can include: relay K, triode
V209, diode V208, resistance R218, resistance R222, resistance R226 and capacitor C200；The normally-closed contact of the relay K with
The sound bus of corresponding extension set is connected, and the transfer contact of the relay K is connected with the sound bus of doorway machine, it is described after
The second normally opened contact of electric appliance K is grounded by capacitor C200；The base stage of the triode V209 is connected by resistance R222 with MCU
Connect, and be grounded by resistance R226, the emitter of triode V209 ground connection, the collector of the triode V209 respectively with
The anode of the diode V208 is connected with the first normally opened contact of the relay K, the cathode of the diode V208 and
The second normally opened contact of the relay K passes through resistance R218 connection power supply VCC.In the present embodiment, channel switching fills all the way
A family extension set can be corresponded to by setting, and be mainly used to carry out each road sound channel isolation switching control, and Z_S is doorway machine sound bus
End, F1_S are householder's extension set sound bus end corresponding to access doorway machine, and under normal conditions, two sound buses are in barrier-like
State, the I/O port S_C1 of MCU control relay to switch whether householder's extension set sound bus can access doorway machine sound bus.
In another specific embodiment, as shown in figure 4, the calling device can include: resistance R217, resistance R216 and
Triode V204；The base stage of the triode V204 is connected by resistance R217 with MCU, the emitter of the triode V204
Ground connection, the collector of the triode V204 are connected by resistance R216 with the sound bus of doorway machine.Z_S is doorway machine quilt
Sound bus port after relay isolation, when MCU detects that a certain key is pressed, MCU, will according to the corresponding extension set of key
Sound channel is switched to corresponding extension set sound bus by channel switching device, at this moment by doorway machine sound bus end Z_S
The KEY_C of doorway machine sound bus and the corresponding MCU of key export high level, and Z_S is pulled low, and calling is generated on sound line
Signal is given to the corresponding extension set of key.Each key can be connected by corresponding key press detecting circuit with MCU, all keys
Key press detecting circuit is all the I/O port for being directly connected to MCU, and when pressing key pressing, key press detecting circuit is notified that the MCU key pair
The extension set called answered, MCU are switched on Z_S to the sound line of corresponding extension set by channel switching device, and then KEY_C is exported
High level, Z_S are pulled low, and call signal is generated on sound line and gives key corresponding extension set, KEY_C is that a call signal is opened
It closes, but which extension set called, determined by channel switching device, and channel switching device is cut by the judgement that MCU is received
It changes.
In another specific embodiment, as shown in figure 5, the power detector can include: resistance R203, resistance
R211, resistance R215, resistance R207, capacitor C215, diode D203 and triode V203；The collector of the triode V203
It is connected with MCU, and by resistance R203 connection power vd D, the emitter of the triode V203 is grounded, the triode
The base stage of V203 passes sequentially through resistance R211 and resistance R215 ground connection, and passes sequentially through resistance R211 and connect two poles with resistance R207
The cathode of pipe D203, the capacitor C215 are connected across the both ends resistance R215, the anode of the diode D203 and corresponding extension set
Power bus is connected.Extension set is monitoring doorway machine and when called, can be exported on power bus a high level (for example,+
Supply voltage 15V).The purpose of power detector is mainly the supply voltage state passed through on detection power bus, to do
The order of corresponding movement cooperation extension set.The corresponding extension set all the way of one power detector, detects each road Exgt Bat extension battery foot voltage
State, F1_P access power bus, connect in system with Exgt Bat extension battery line, when extension set has+15V high level to come, D203 is led
Logical, V203 is connected high level of the P_T1 by static state when and is pulled low after electric resistance partial pressure, and MCU records this state, using as point
Machine monitoring or the state recording under video intercom are compared by the time record of state completely to realize system function.
Below by taking four family extension sets as an example, system according to Fig.2, carries out further technical solution of the present invention
It is bright.In this example, per including per family video bus, earth bus, power bus and sound bus, corresponding extension set is connect respectively,
Form more 4 line visual-speaking systems of house type.Wherein, power detector 1 and the corresponding extension set 1 of channel switching device 1, power detecting
Device 2 and the corresponding extension set 2 of channel switching device 2, and so on.
Doorway machine is often powered, and citing user presses doorway machine key 1, and MCU detects that key 1 is pressed, and judges to be pressed
Extension set 1 corresponding to key 1, MCU output S_C1 set height, V209 conducting, and relay K1 is attracted, and F1_S and Z_S are connected, doorway machine
It is connected with the sound line of extension set 1, KEY_C exports high level, and Z_S is pulled low, and call signal is generated in sound bus to key
Corresponding extension set 1, doorway machine open video frequency transmitter and audio transmission device, 1 called of extension set, and extension set 1 executes called
Movement, optionally, extension set 1 issue ringback tone can be sent out from sound bus through the sound transmission device of Z_S to doorway machine
Sound, extension set 1 can transmit power detecting dress of high level (for example,+15V) power supply to F1_P, by doorway machine by power bus
It sets, the reason of high level when P_T1 is by static state is pulled low, this state is changed is firstly because key 1 and is pressed, therefore MCU
It (is prison if variation that P_T1 state has from high to low if being pressed without key 1 that record this state, which be call state,
Depending on state), extension set 1 picks, and doorway machine and extension set 1 enter video intercom state, the order if input of extension set 1 is unlocked, and extension set 1 is defeated
High level (for example,+15V) unlocking voltage is to sound bus out, through doorway machine F1_S sound line, since this is that 1 sound of extension set is total
What line F1_S and doorway machine sound line Z_S was to turn on, unlocking voltage signal is transferred to unlocking apparatus by Z_S, unlocking apparatus
Incoming end can be the reversal connection of+7V voltage-stabiliser tube, and+15V unlocking voltage signal unlocks to voltage-stabiliser tube reverse-conducting, doorway machine control.Point
When 1 on-hook of machine, extension set 1 stops to power bus output high level voltage, and at this moment F1_P is low, and V203 cut-off, P_T1 is turned by height
For low potential, MCU is outputed signal to, at this moment MCU is judged as that calling video intercom terminates, inside doorway machine MCU detection system also
Signal is monitored either with or without other extension sets, if so, only closing the audio transmission device of doorway machine, channel switching device restores normal
State retains video frequency transmitter and works on, until monitoring signal-off；If monitoring signal without other extension sets, close
Doorway machine video intercom working condition, returns to normal.
When extension set 1 monitors doorway machine, extension set 1 transmits high level (for example,+15V) voltage to F1_P by power supply line, passes through
The power detector of doorway machine, high level when P_T1 is by static state are pulled low, doorway machine MCU at this moment with doorway machine push button signalling
It is compared, is pressed in the preset time period (for example, 10 seconds) before state change either with or without corresponding call button, if do not had
Then it is judged as monitoring signal, doorway machine only opens vision signal, and sound bus relay, which remains unchanged, is failure to actuate.1 on-hook of extension set,
F1_P is switched to low by height, and by the power detector of doorway machine, P_T1 switchs to high level, doorway machine MCU by low level before
It has calling extension set inside detection system or not or extension set monitoring signal returns to normal if not provided, closing vision signal.
Current 4 line product is mainly used for only house type, i.e. the corresponding family extension set of a family doorway machine, extension set can for 1 or
More, but not can be carried out single area point, still fall within the mode that all extension sets in system are then grouied busy in a calling.And more house type building
Visual-speaking system is mainly realized that cost of implementation is relatively high, and resident is independently installed to grasp by multiple-way system and increase intermediate equipment
The property made is not also strong.4 line intercom system of more house types and its doorway machine of the invention is realized using four-wire system, simultaneous in terms of the mode of connection
The extension set for holding only house type is to have more the 4 line connection jaws at other several families, can access more families simultaneously with the difference of only house type doorway machine
Extension set.It is particularly suitable for the house that floor is fewer, resident has differentiation, a corresponding family extension set of calling key.In villa cluster or
In the relatively low application of floor, in final system function, the achievable much the same situation of performance, intercommunication of the invention
System all has very big advantage in equipment cost, engineering wiring cost than traditional intercom system.
As shown in fig. 6, the present embodiment also provides a kind of intercom system, it may include doorway machine；And respectively with the doorway
Multiple extension sets that machine is connected；Wherein, the sound bus of the doorway machine passes through each channel switching device and each point respectively
The sound bus of machine is correspondingly connected with, and each power detector of the doorway machine is corresponding with the power bus of each extension set respectively
The earth bus of connection, the earth bus of the doorway machine and each extension set is grounded, the video frequency transmitter point of the doorway machine
It is not connected with the video bus of each extension set, each extension set is connected with corresponding power supply respectively.
The embodiment of doorway machine of embodiment and intercom system of above-mentioned doorway machine is identical, and details are not described herein again.With it is above-mentioned
Correspondingly, above-mentioned extension set can be the extension set in building conversational system, the mountable premises in building to doorway machine.At one
In embodiment, each extension set is the extension set of different residents, is separately mounted to the premises of different residents.Each extension set can lead to
Corresponding Wiring port connection doorway machine is crossed, Wiring port may include sound bus interface, power bus interface and earth bus
Interface further includes optionally video bus interface.The sound bus interface that each extension set passes through corresponding Wiring port connects doorway
The channel selection device of machine, the power bus interface that each extension set passes through corresponding Wiring port connect the power detecting dress of doorway machine
It sets, each extension set passes through the earth bus interfacing ground of corresponding Wiring port, and optionally, each extension set also passes through corresponding terminals
The video frequency transmitter of the video bus interface connection doorway machine of mouth.It include 4 extension sets, but ability in embodiment shown in Fig. 6
It is found that the present invention is not limited thereto, the quantity of extension set can be set field technique personnel according to actual needs.
In one embodiment, each extension set and doorway machine can be separately connected power supply, and the power supply is used for doorway machine
Or corresponding extension set power supply.
The invention has the following advantages that
(1) low in cost, simplify circuit structure, doorway machine to extension set realizes more family building visual intercommunications by 4 lines.
(2) it works well, anti-interference and transporting are more preferable after each family extension set sound line is isolated.
(3) implementation is simple, and extension set is not necessarily to encoding setting, without increasing intermediate equipment.
(4) call signal and monitoring signal are distinguished, only can just be unlocked under video intercom state, safety is improved.
(5) when more families, calling, monitoring crossover operation, guarantee system stability.
(6) extension set of more 4 line doorway machines of house type compatible only house type in terms of the mode of connection, scalability are stronger.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (10)
1. a kind of doorway machine of intercom system characterized by comprising
Audio transmission device, MCU, calling device, multiple channel switching devices and multiple power detectors；
The calling device, the audio transmission device, the multiple channel switching device and the multiple power detector
It is connected respectively with the MCU, the calling device and audio transmission device are separately connected the sound bus of doorway machine, the door
The sound bus of mouth machine is connected with each channel switching device respectively, and each channel switching device is each with intercom system respectively
The sound bus of a extension set is correspondingly connected with, each power detector power bus pair with each extension set of intercom system respectively
It should connect；
The MCU controls corresponding channel switching device conducting, by the sound of doorway machine after detecting that intended extension is selected
Sound bus is connected with the sound bus of intended extension；
The calling device sends call signal to the sound bus of intended extension by the channel switching device of conducting；
The power detector receives the call-connected signal that the intended extension responds the call signal output, to described
Call-connected signal carries out level detection, and the first testing result is sent to MCU；
The MCU starts audio transmission device according to first testing result, opens intercommunication state.
2. the doorway machine of intercom system according to claim 1, which is characterized in that further include:
Video frequency transmitter；
The video frequency transmitter is connected with the MCU, and is connected respectively with the video bus of each extension set；
The MCU starts video frequency transmitter according to first testing result, opens video intercom state.
3. the doorway machine of intercom system according to claim 2, which is characterized in that further include:
Unlocking apparatus；
The unlocking apparatus is connected with each channel switching device respectively by the sound bus of doorway machine；
When unlocking, the unlocking apparatus receives the unlocking signal that the intended extension is sent by corresponding sound bus, and rings
The unlocking signal opening gate is answered to lock.
4. the doorway machine of intercom system according to claim 2, which is characterized in that the power detector is also used to:
When at least one of each extension set monitors doorway machine, the extension set for receiving monitoring doorway machine passes through corresponding power bus
The monitoring signal of transmission；
Level detection is carried out to the monitoring signal, and the second testing result is sent to MCU；
The MCU is also used to:
Start video frequency transmitter according to second testing result, opens monitored state.
5. the doorway machine of intercom system according to claim 4, which is characterized in that the power detector is also used to:
In the intended extension on-hook, the on-hook signal that the intended extension is exported by corresponding power bus is received；
Level detection is carried out to the on-hook signal, and third testing result is sent to MCU；
The MCU is also used to:
After receiving the third testing result, the monitoring signal of each extension set is detected；
If detecting monitoring signal, audio transmission device is closed；
If monitoring signal is not detected, video frequency transmitter and audio transmission device are closed.
6. the doorway machine of intercom system according to claim 5, which is characterized in that the MCU is also used to:
If receiving second testing result, and do not examined in the preset time period before receiving second testing result
It is selected to measure intended extension, starts video frequency transmitter.
7. according to claim 1 to the doorway machine of intercom system described in 6 any one, which is characterized in that the channel switching
Device includes:
Relay K, triode V209, diode V208, resistance R218, resistance R222, resistance R226 and capacitor C200；
The normally-closed contact of the relay K is connected with the sound bus of corresponding extension set, the transfer contact of the relay K and door
The sound bus of mouth machine is connected, and the second normally opened contact of the relay K is grounded by capacitor C200；
The base stage of the triode V209 is connected by resistance R222 with MCU, and is grounded by resistance R226, the triode
The emitter of V209 is grounded, the collector of the triode V209 respectively with the anode and the relay of the diode V208
The first normally opened contact of K is connected, and the second normally opened contact of the cathode of the diode V208 and the relay K pass through resistance
R218 connection power supply VCC.
8. according to claim 1 to the doorway machine of intercom system described in 6 any one, which is characterized in that the calling device
Include:
Resistance R217, resistance R216 and triode V204；
The base stage of the triode V204 is connected by resistance R217 with MCU, the emitter ground connection of the triode V204, institute
The collector for stating triode V204 is connected by resistance R216 with the sound bus of doorway machine.
9. according to claim 1 to the doorway machine of intercom system described in 6 any one, which is characterized in that the power detecting
Device includes:
Resistance R203, resistance R211, resistance R215, resistance R207, capacitor C215, diode D203 and triode V203；
The collector of the triode V203 is connected with MCU, and passes through resistance R203 connection power vd D, the triode
The emitter of V203 is grounded, and the base stage of the triode V203 passes sequentially through resistance R211 and resistance R215 ground connection, and successively leads to
The cathode that resistance R211 connects diode D203 with resistance R207 is crossed, the capacitor C215 is connected across the both ends resistance R215, described
The anode of diode D203 is connected with the power bus of corresponding extension set.
10. a kind of intercom system characterized by comprising
The doorway machine of intercom system as described in claim 2 to 9 any one；And
The multiple extension sets being connected respectively with the doorway machine；
Wherein, the sound bus of the doorway machine is corresponding with the sound bus of each extension set by each channel switching device respectively
Connection, power bus of each power detector of the doorway machine respectively with each extension set are correspondingly connected with, the doorway machine
Earth bus and the earth bus of each extension set be grounded, the video frequency transmitter of the doorway machine view with each extension set respectively
Frequency bus is connected, and each extension set is connected with corresponding power supply respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710295272.2A CN106982360B (en) | 2017-04-28 | 2017-04-28 | Intercom system and its doorway machine |
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| CN106982360B true CN106982360B (en) | 2019-07-30 |
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| WO2018195948A1 (en) * | 2017-04-28 | 2018-11-01 | 广东安居宝数码科技股份有限公司 | Intercom system and entrance machine thereof |
| CN110250937B (en) | 2017-08-09 | 2020-09-04 | 沙克忍者运营有限责任公司 | Cooking system |
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| CN201266992Y (en) * | 2008-07-01 | 2009-07-01 | 林毅 | Four-wire system building video talking sub-telephone |
| CN201341205Y (en) * | 2009-01-08 | 2009-11-04 | 林文 | Visual talkback access control device with simple installation |
| CN201491092U (en) * | 2009-07-28 | 2010-05-26 | 深圳市金积嘉电子工业有限公司 | Four-wire video intercom doorbell |
| CN102685442A (en) * | 2012-05-02 | 2012-09-19 | 浙江东建电子有限公司 | Power carrier communication technology-based building intercom system |
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|---|---|---|---|---|
| CN201266992Y (en) * | 2008-07-01 | 2009-07-01 | 林毅 | Four-wire system building video talking sub-telephone |
| CN201341205Y (en) * | 2009-01-08 | 2009-11-04 | 林文 | Visual talkback access control device with simple installation |
| CN201491092U (en) * | 2009-07-28 | 2010-05-26 | 深圳市金积嘉电子工业有限公司 | Four-wire video intercom doorbell |
| CN102685442A (en) * | 2012-05-02 | 2012-09-19 | 浙江东建电子有限公司 | Power carrier communication technology-based building intercom system |
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