CN203912096U - Low-cost building intercom device - Google Patents
Low-cost building intercom device Download PDFInfo
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- CN203912096U CN203912096U CN201420303254.6U CN201420303254U CN203912096U CN 203912096 U CN203912096 U CN 203912096U CN 201420303254 U CN201420303254 U CN 201420303254U CN 203912096 U CN203912096 U CN 203912096U
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Abstract
The utility model discloses a low-cost building intercom device, and relates to a monitoring device. The low-cost building intercom device is characterized in that a management machine is connected with an entrance machine, a door lock, a power supply and a plurality of isolators through a network cable, and each of the isolators is connected to corresponding indoor units through a plurality of internal cables; the isolator comprises a singlechip microcomputer, a power conversion circuit, a communication chip, an audio/video switching circuit and a plurality of extension set interface circuits; the indoor unit comprises a communication circuit, a display, a key circuit, a microphone and a loudspeaker; the internal cable adopts an eight-core cable; the key circuit comprises four function keys and five diodes; the singlechip microcomputer is provided with a plurality of analog/digital conversion input ends; and the extension set interface circuit is internally provided with a key detection circuit, the input end and the output end of the extension set interface circuit are connected to one end of a pull-up resistor together, a key detection terminal on an eight-core socket of the extension set interface circuit, and the corresponding input end of an analog/digital conversion input port of the singlechip microcomputer, and the other end of the pull-up resistor is connected to a positive electrode of a DC power supply of the extension set interface circuit.
Description
Technical field
The utility model relates to a kind of supervising device.
Background technology
Building talkback and intelligent domestic system are networked and are formed by network cable by the unit of the networked devices in community and each building.Networked devices comprises supervisor, computer, networking switch, enclosure wall machine, networking switch etc.The unit of each building comprises: doorway machine, isolator, swipe the card head, card reader, meter-copy device, data link, power supply, lockset etc.; Wherein: each resident family is equipped with an indoor set, this indoor set is equipped with speaking circuit, keyboard and display.The effect of doorway machine be carry out sound for providing the personnel on this building doorway with the indoor set of specifying resident family, video exchanges with control data, it is equipped with keyboard, speaking circuit and camera.Isolator is interconnection network cable on the one hand, connect respectively on the other hand the indoor set of each appointment resident family by several (4 or 6 or 8) Internal cable, its effect is alternatively to do selectable electrical connection between the doorway machine of these building and the indoor set of these appointment resident families, thereby isolates the indoor set of non-selected resident family.Fig. 1 illustrates in this network, relevant with building essential part: network cable 3 (surpassing 5 class lines) couples together supervisor 4 and m isolator 2 of doorway machine 5, door lock 6, power supply 7 and these building of these building, and each isolator 2 connects respectively in n indoor set 1 through n bar Internal cable 9.
Be arranged on and in the indoor set 1 in man of resident family, have four kinds of basic functions: (1), utilize the doorway machine 5 on these building doorway and the visitor on these building doorway to carry out voice call; (2), utilize the doorway machine 5 on these building doorway, show by video these building doorway situation of checking; (3), control the door lock 6 of opening these building doorway; (4), send alarm calls to supervisor 4.Therefore, isolator 2 will have 8 lines to the Internal cable 9 of indoor set 1 is minimum: a video signal cable, a pair ofly provide 15V power line and the ground wire thereof of electric energy for video display,, a voice signal line, a pair of for voice call circuit provides 12V power line and the ground wire thereof of electric energy, data wire and ground wire thereof.
For make resident family can its family of choice for use in any in four kinds of basic functions of indoor set 1, generally on indoor set 1, be provided with hand-free call key (with the voice call on these building doorway), unlock key (opening these building door lock), video monitor key (show and check these building doorway situation with video), such four buttons of alarm calls key (sending alarm calls to supervisor).For doorway machine 5, door lock 6 and the supervisor 4 of these building can operate accordingly by the requirement of resident family, just need to detect that in these four buttons, which is pressed.
Adopt if be connected to the Internal cable 9 of the indoor set 1 of resident family the 5 class lines that surpass that have 8 lines, except video signal cable for display and a pair of 15V power line and ground wire thereof, for voice signal line and a pair of 12V power line and the ground wire thereof of speaking circuit, an only remaining data wire and ground wire thereof.
In this case, common processing mode is in each indoor set 1, to put a single-chip microcomputer (CPU), complete the detection of key-press status, and the coding of the button being pressed is provided, in corresponding isolator 2 or doorway machine 5, corresponding decoding unit is set simultaneously.But this mode, not only internal structure complexity, the cost of indoor set 1 are high, and isolator 2 or doorway machine 5 want corresponding numerous indoor set 1 that corresponding decoding unit is set, and cost also will increase a lot.
In this case, another kind of processing mode is to pull on a special split conductor at each indoor set 1 to corresponding isolator 2, the state information of four buttons is provided with few four lines in this split conductor, on isolator 2, put a CPU, in the data-in port of this CPU, arrange four inputs connect and complete the detection for corresponding key-press status with this with these four lines respectively.
Fig. 2 illustrates the circuit box structure of this indoor set 1.In 12 terminals of 12 core sockets 11 of this indoor set 1: voice signal line, 12V power line and ground wire thereof connect speaking circuit 12; Video signal cable, 15V power line and ground wire thereof connect display 15; Article 4, data wire, 5V power line and ground wire thereof connect key circuit 16.
In addition, in this indoor set 1, microphone 13 is connected respectively speaking circuit 12 with loudspeaker 14.The effect of speaking circuit 12 is audio-signal-driven loudspeaker 14 that the external digital formula voice data that provides with voice signal line is converted to analog quantity, and the analog quantity audio-frequency information of the indoor speech that microphone 13 is provided is converted to digital voice data and sends outward by voice signal alignment, thereby realize voice call, the structure of speaking circuit 12 is known technology, does not repeat.
The structure of the key circuit 16 corresponding with this indoor set 1, as shown in Figure 3.It has four function buttons, hand-free call key K1, unlock key K2, video monitor key K3, alarm calls key K4 and four pull-up resistor R1, R2, R3, R4, the first end of the first pull-up resistor R1, the first end of the second pull-up resistor R2, the first end of the 3rd pull-up resistor R3, the first end of the 4th pull-up resistor R4 connects 5V positive supply jointly, the first end of the second termination hand-free call key K1 of the first pull-up resistor R1 and the first button detect data wire KEY1, the first end of the second termination unlock key K2 of the second pull-up resistor R2 and the second button detect data wire KEY2, the first end of the second termination video monitor key K3 of the 3rd pull-up resistor R3 and the 3rd button detect data wire KEY3, the first end of the second termination alarm calls key K4 of the 4th pull-up resistor R4 and the 4th button detect data wire KEY4, the second end of four function button K1, K2, K3, K4 is all connected with ground wire GND.In the time that a certain button is pressed, the voltage that corresponding button detects data wire is ground level, otherwise is high level.4 buttons of key circuit 16 detect data wire KEY1, KEY2, KEY3, KEY4 and 5V power supply and ground wire thereof and will take a remaining data wire and the ground wire on 5 class lines of surpassing of Internal cable 9, also will use four lines on a special split conductor.
The circuit box structure of isolator 2, as shown in Figure 4.It has the RS485 interface socket 22 of a single-chip microcomputer 21 (CPU), the access (abbreviation seals in) of connecting with network cable 3 (surpassing 5 class lines in Fig. 1) and one to connect and pick out the RS485 interface socket 23 of (abbreviation is gone here and there out) with network cable 3 (surpassing 5 class lines in Fig. 1), and power-switching circuit 24, communication chip 25, audio frequency and video commutation circuit 26 and multiple extension set interface circuit 27-1, a 27-2 ... 27-n.
The RS485 interface socket 22 sealing in and the RS485 interface socket 23 of going here and there out are 8 pin sockets, and the corresponding pin of their each identical numbering is connected.Seal on RS485 interface socket 22 have+27V DC power supply and ground wire thereof, audio signal data line and ground wire thereof, video signal data line and ground wire thereof, communication data line and ground wire thereof.
On the RS485 interface socket 22 sealing in+27V DC power supply and the external connection layout 1 of ground wire thereof in power supply 7, internally connect the input port of power-switching circuit 24.The output port You San road direct current output of power-switching circuit 24.Wherein, the first via is+5V and ground wire thereof, to single-chip microcomputer 21, communication chip 25, audio frequency and video commutation circuit 26, each extension set interface circuit 27-1,27-2 ... 27-n power supply.The second tunnel is+12V and ground wire thereof, and Third Road is+15V and ground wire thereof, and they and the first via+5V and ground wire thereof are all by each extension set interface circuit 27-1,27-2 ... 27-n and Internal cable 9 are powered to each indoor set 1.
Communication chip 25 has two two-way data communication port.On the RS485 interface socket 22 sealing in, communication data line and ground wire thereof are connected with the first port of communication chip 25, and the second port of communication chip 25 connects the communication data I/O port 211 of single-chip microcomputer 21.Single-chip microcomputer 21 carries out the exchange of control information and response message through communication chip 25 and the supervisor 4 (or miscellaneous equipment) on external network cable (surpassing 5 class lines 3 in Fig. 1).
Audio frequency and video commutation circuit 26 has master data port, control input end and divided data port; Master data port has audio signal data line and video signal data line, and divided data port also has its corresponding audio signal data line and video signal data line.On control input end, under the control of control signal, the audio signal data line on master data port and the signal of video signal data line are communicated with or disconnect with audio signal data line and the video signal data line of divided data port respectively.
Each extension set interface circuit 27 has its master data port, control input end, button detection signal output port, power input mouth and 12 core sockets.This master data port has audio signal data line and ground wire, video signal data line and ground wire thereof, and on this 12 core socket, corresponding aforesaid Internal cable 9 has voice signal line, 12V power line and ground wire thereof, video signal cable, 15V power line and ground wire thereof, 4 buttons to detect data wire, 5V power line and ground wire thereof.12 core sockets of each extension set interface circuit 27 are connected with 12 core sockets of corresponding resident family indoor set 1 through aforementioned Internal cable 9 respectively.Under the control of extension set interface circuit 27 control signal on control input end, audio signal data line on its master data port and the signal of video signal data line are communicated with or disconnect with audio signal data line and the video signal data line of its divided data port respectively, and each button detection signal output line of its button detection signal output port is communicated with or disconnects with 4 buttons detection data wires on 12 core sockets respectively simultaneously.
On the RS485 interface socket 22 sealing in, audio signal data line and ground wire thereof, video signal data line and ground wire thereof connect with terminal corresponding on the master data port of audio frequency and video commutation circuit 26 respectively, the divided data port of audio frequency and video commutation circuit 26 and each extension set interface circuit 27-1,27-2 ... the master data port of 27-n connects, and the control input end of audio frequency and video commutation circuit 26 connects the first control output end mouth 212 of single-chip microcomputer 21.Audio frequency and video commutation circuit 26 under the control of single-chip microcomputer 21, by the audio signal data line of master data port and video signal data line respectively with each extension set interface circuit 27-1,27-2 ... the audio signal data line of the master data port of 27-n, video signal data line are done corresponding connection.Each control output end of the second control output end mouth 213 of single-chip microcomputer 21 connects respectively the control input end of corresponding extension set interface circuit 27, under the control of single-chip microcomputer 21 second control output end mouths 213, audio signal data line, the video signal data line difference correspondence of himself master data port are communicated with voice signal line terminals, vision signal line terminals on its inner 12 core sockets by chosen extension set interface circuit 27.
Each input that the button of single-chip microcomputer 21 detects input port 214 connects respectively each extension set interface circuit 27-1,27-2 ... the corresponding button of 27-n button detection signal output port detects output, under the control of single-chip microcomputer 21 second control output end mouths 213, the button that the data-signal of 4 button detection data terminals on its inner 12 core sockets is delivered to single-chip microcomputer 21 by chosen extension set interface circuit 27 detects input port.Single-chip microcomputer 21 can draw hand-free call key K1, the unlock key K2 of corresponding indoor set 1 key circuit 16 of this extension set interface circuit 27, the state information of video monitor key K3, alarm calls key K4 accordingly, and carries out corresponding control operation.
As shown in Figure 5, its inside has frequency switch circuit 271, video switch circuit 272, button to detect commutation circuit 273 and 12 core sockets 275 to the circuit structure of extension set interface circuit 27.
The audio signal data line of extension set interface circuit 27 master data ports is the first audio signal data line of frequency switch circuit 271; The second audio signal data line of frequency switch circuit 271 is connected with the voice signal line terminals on 12 core sockets 275.The video signal data line of extension set interface circuit 27 master data ports is the first video signal data line of video switch circuit 272.The second video signal data line of video switch circuit 272 is connected with the vision signal line terminals on 12 core sockets 275.Four inputs that button detects commutation circuit 273 connect respectively corresponding button detection data line terminal on 12 core sockets 275, and four outputs of button detection commutation circuit 273 connect respectively corresponding button on single-chip microcomputer 21 buttons detection input ports 214 and detect input.
The control input end that the control input end of frequency switch circuit 271, the control input end of video switch circuit 272 and button detect commutation circuit 273 connects together, and is connected with the corresponding control output end of single-chip microcomputer 21 second control output end mouths 213 as the control input end of this extension set interface circuit 27.Whether this control output end of single-chip microcomputer 21 second control output end mouths 213 is controlled the first audio signal data line on frequency switch circuit 271 and is communicated with voice signal line terminals on 12 core sockets 275, on video switch circuit 272, whether the first video signal data line is communicated with video signal cable terminal on 12 core sockets 275, and on 12 core sockets 275, four buttons detect data line terminal and whether detect button detection input connection corresponding on input port 214 with single-chip microcomputer 21 buttons.
So this isolator 2 can be under the control of each control output end of single-chip microcomputer 21 second control output end mouths 213, select the indoor set 1 of specifying 12 core sockets 275 on extension set interface circuit 27 to connect, realize and being connected accordingly with supervisor 4, doorway machine 5, door lock 6 through network cable (surpassing 5 class lines 3 in Fig. 1), and where necessary according to the state information of hand-free call key K1, unlock key K2, video monitor key K3, alarm calls key K4 in this indoor set 1, notice supervisor 4 or doorway machine 5 or door lock 6 carry out corresponding feature operation.
In this processing mode, although one of 1 needs of 2 to indoor sets of isolator surpass 5 class lines and a special split conductor, but consider that an isolator 2 will connect multiple (normally 4 or 6 or 8) indoor set 1, will have multiple isolators 2 in building; So this processing mode Internal cable 9 except basic surpassing 5 class lines, is wanted multiplex a lot of special split conductor in building, construction is complicated, cost is also high.
In addition, when isolator 2 and the indoor set 1 of each resident family are done in Internal cable 9 installation processes, once careless or mistake, as being connected together, power line and ground wire can make isolator 2 or corresponding indoor set 1 burn out, and reliable not.
Utility model content
The utility model aims to provide the low cost building inter-speaking device that only needs 8 heart yearns between a kind of isolator and the indoor set of resident family.And then the power line and the earth short that solve building inter-speaking device problem that isolator or corresponding indoor set are burnt out.
The technical solution of the utility model is: low cost building inter-speaking device, and network cable couples together the doorway machine of supervisor and building, door lock, power supply and multiple isolator, and each isolator connects corresponding indoor set through many Internal cable respectively, in isolator, there are single-chip microcomputer, power-switching circuit, communication chip, audio frequency and video commutation circuit and multiple extension set interface circuit, audio signal data line and ground wire thereof on network cable, video signal data line and ground wire thereof connect with terminal corresponding on the master data port of audio frequency and video commutation circuit respectively, the divided data port of audio frequency and video commutation circuit is connected with the master data port of each extension set interface circuit, the control input end of audio frequency and video commutation circuit connects the first control output end mouth of single-chip microcomputer, each control output end of the second control output end mouth of single-chip microcomputer connects respectively the control input end of corresponding extension set interface circuit, each extension set interface circuit is connected with corresponding resident family indoor set through corresponding internal connection line cable respectively, there are frequency switch circuit, video switch circuit and 8 core sockets in extension set interface circuit inside, the first audio signal data line that the audio signal data line of extension set interface circuit master data port is frequency switch circuit, the second audio signal data line of frequency switch circuit is connected with the voice signal line terminals on 8 core sockets, the first video signal data line that the video signal data line of extension set interface circuit master data port is video switch circuit, the second video signal data line of video switch circuit is connected with the vision signal line terminals on 8 core sockets, the control input end of frequency switch circuit, the control input end of video switch circuit connect together, and are connected with the corresponding control output end of single-chip microcomputer the second control output end mouth as the control input end of this extension set interface circuit, in indoor set, there are speaking circuit, display, key circuit, microphone and loudspeaker, Internal cable adopts 8 heart yearns, in this indoor set, there is key circuit, it has four function buttons and five diodes, five diodes are connected in series in turn in the same way, wherein minus earth line, the anode of the first diode connect the first end of the first button, the anode of the second diode connects the first end of the second button, the anode of the 3rd diode connects the first end of the 3rd button, and the anode of the 4th diode connects the first end of the 4th button, and the anode of the 5th diode connects button and detects data wire, the second end of four buttons is all connected with ground wire, single-chip microcomputer in isolator is with multiple mould/number conversion inputs, there is key press detecting circuit extension set interface circuit inside in isolator, the input of this key press detecting circuit and output are jointly connected button on one end and this extension set interface circuit 8 core sockets of pull-up resistor and detect button corresponding on data line terminal and single-chip microcomputer mould/number conversion input port and detect input, and the other end of pull-up resistor connects the positive pole of this extension set interface circuit DC power supply.
The utility model is on the basis of existing building inter-speaking device, in isolator, use instead with the single-chip microcomputer of multiple mould/number conversion inputs the button that uses simple key press detecting circuit to substitute in former extension set interface circuit and detect commutation circuit, in each indoor set, form as long as the key circuit of a data lines and a ground wire with four function buttons and five diodes simultaneously; Make the change of essence from button testing mechanism, solved Internal cable between isolator and indoor set except 8 basic cores surpass 5 class lines, in building, want multiplex a lot of special split conductors, the problem that construction is complicated, cost is high.In this isolator, key press detecting circuit only has a pull-up resistor and is directly connected with corresponding mould/number conversion input on single-chip microcomputer, also can reduce the cost of isolator and can offset the fringe cost that in each indoor set, the key circuit of additional five diodes composition produces outside four function buttons.So holistic cost of the present utility model relatively prior art reduces significantly.
In described isolator also have short-circuit detecting circuit, this short-circuit detecting circuit have+12V branch road and+15V branch road; Described single-chip microcomputer has power detection signal port; This short-circuit detecting circuit inside+the short-circuit detecting output of the short-circuit detecting output of 12V branch road and+15V branch road is connected respectively corresponding input terminal on the power detection signal port of this single-chip microcomputer; The output port of the power-switching circuit in described isolator respectively to short-circuit detecting circuit+12V branch road and ground wire thereof ,+15V branch road and ground wire power supply thereof; The low level of corresponding input terminal level on the power detection signal port of this single-chip microcomputer.The inner switching type power supply commutation circuit in addition of described extension set interface circuit, on the input port of this power supply switch circuit+12V input and+15V input respectively with in this short-circuit detecting circuit+12V branch road is corresponding with+15V branch road+12V output and+15V exports and is connected, on this power supply switch circuit output port+12V output and+15V output respectively+12V terminal corresponding with this extension set interface circuit 8 core sockets be connected with+15V terminal; This power supply switch circuit control input end connects the control input end of this extension set interface circuit, and is connected with the corresponding extension set interface circuit control output end of single-chip microcomputer the second control output end mouth.
Utilize single-chip microcomputer power detection signal Port detecting+12V branch road output loop and+whether the output loop of 15V branch road have the fault of short circuit, and then control on its power supply switch circuit input port+12V input of the extension set interface circuit control output end that utilizes the current operation of single-chip microcomputer the second control output end mouth and+15V input no longer+12V lead-out terminal corresponding with its 8 core socket and+15V lead-out terminal is connected, the problem that the power line that solves building inter-speaking device and earth short burn out isolator or corresponding indoor set.Not only solve the problem of avoiding causing damage in installation process, also improved the reliability of complete machine in long-term use.
Described short-circuit detecting circuit+15V branch road input port and power-switching circuit+the corresponding connection of 15V output port.+ 15V input is through outwards export+15V of a detection resistance DC power supply, and be somebody's turn to do+15V DC power supply terminal is connected with the positive pole of isolating diode; The negative pole of this isolating diode is connected with the negative pole of voltage stabilizing didoe; The positive pole of voltage stabilizing didoe connects one end of base resistance, and the other end of this base resistance is connected with the base stage of NPN type triode and one end of biasing resistor, and the emitter of this triode is connected common ground with the other end of this biasing resistor; Collector electrode connection+15V short-circuit detecting the output of this triode and one end of collector resistance, the other end of this collector resistance connects the DC power supply positive electrode of this extension set interface circuit; This common ground connects respectively the DC power supply ground wire terminal of this extension set interface circuit and the ground wire terminal of this circuit+15V output; In short-circuit detecting circuit+12V branch road and+circuit structure of 15V branch road is identical, the parameter that is inner voltage-stabiliser tube is slightly different, the parameter of+12V branch road inside voltage-stabiliser tube is 9V; And+parameter of the inner voltage-stabiliser tube of 15V branch road is 12V.
This short-circuit detecting circuit simple in structure, part cheapness and quantity are few, and fringe cost is extremely low.
The utility model low cost building inter-speaking device, the state of four buttons of indoor set detects by a data wire, Chip Microcomputer A/D sampling by isolator is determined, avoid using additional split conductor between isolator and multiple indoor set, because the price of the single-chip microcomputer with multiple mould/number conversion inputs is not with general roughly the same with the single-chip microcomputer price of mould/number conversion input, in building, the length of those split conductors that isolator uses is short several meters, long tens of rice, the split conductor length that multiple isolators are used and price are all very considerable, so the utility model has reduced the cost of complete machine.Above isolator of the present utility model, done short-circuit detecting circuit, the fault of 12V speech power supply short circuit and 15V video power supply short circuit not only can be by cutting off each equipment of power supply protection, and the consequence of Accident prevention expands; Can also know and can feed back to doorway machine and administrative office processes in time by the single-chip microcomputer in isolator.Make system can point out short-circuit conditions, the reliability of system is greatly improved.
Brief description of the drawings
Fig. 1 is the frame structure schematic diagram of supervisor in existing building talkback and intelligent domestic system, network cable and the unit of building and the annexation of each indoor set.
Fig. 2 is the circuit box structure schematic diagram of the indoor set in Fig. 1.
Fig. 3 is the electrical block diagram of key circuit in Fig. 2.
Fig. 4 is the circuit box structure schematic diagram of the isolator in Fig. 1.
Fig. 5 is the circuit box structure schematic diagram of the extension set interface circuit in Fig. 4.
Fig. 6 is the circuit box structure schematic diagram of an embodiment of the utility model low cost building inter-speaking device.
Fig. 7 is the circuit box structure schematic diagram of the indoor set in Fig. 6 embodiment.
Fig. 8 is the electrical block diagram of key circuit in Fig. 7.
Fig. 9 is the circuit box structure schematic diagram of isolator in Fig. 6 embodiment.
Figure 10 is the circuit box structure schematic diagram of the extension set interface circuit in Fig. 9.
Figure 11 is the electrical block diagram of key press detecting circuit in Figure 10.
Figure 12 is in Fig. 9 in short-circuit detecting circuit+electrical block diagram of 15V branch road.
Embodiment
One, embodiment mono-
An embodiment of the utility model low cost building inter-speaking device as shown in Figure 6, for aforesaid building talkback and intelligent domestic system; In this device, network cable 3 couples together multiple (m) isolator 2 ' of doorway machine 5, door lock 6, power supply 7 and these building in outside supervisor 4 and building, and each isolator 2 ' connects corresponding indoor set 1 ' through many (n bar) Internal cable 9 ' respectively.In the present embodiment, these indoor sets 1 ' and isolator 2 ' all adopt special structure, Internal cable 9 ' can be adopted and only have the 5 class lines that surpass of 8 lines to form so-called low cost building inter-speaking device.
The circuit box structure of indoor set 1 ' in the present embodiment, as shown in Figure 7.In 8 core sockets 11 ' of this indoor set 1 ', the terminal of voice signal line, 12V power line and ground wire thereof connects respectively speaking circuit 12 ', the terminal of video signal cable, 15V power line and ground wire thereof connects respectively display 15 ', and the terminal of data wire and ground wire thereof connects respectively key circuit 16 '.Microphone 13 ' is connected respectively speaking circuit 12 ' with loudspeaker 14 '.The effect of speaking circuit 12 ' is the conversion that realizes digital data on the audio analog signals of microphone 13 ' and loudspeaker 14 ' voice call and voice signal line, and its structure is known technology.
The structure of the key circuit 16 ' corresponding with this indoor set 1 ', as shown in Figure 8.It has four function buttons and five diodes: hand-free call key K1, unlock key K2, video monitor key K3, alarm calls key K4, the first diode D1, the second diode D2, the 3rd diode D3, the 4th diode D4, the 5th diode D5.Five diode D1, D2, D3, D4, D5 is connected in series in turn, the wherein minus earth line GND of the first diode D1, the negative electrode of the anode of the first diode D1 and the second diode D2 connects the first end of hand-free call key K1, the negative electrode of the anode of the second diode D2 and the 3rd diode D3 connects the first end of unlock key K2, the negative electrode of the anode of the 3rd diode D3 and the 4th diode D4 connects the first end of video monitor key K3, the first end of the negative electrode assignment key K4 taking alarm of the anode of the 4th diode D4 and the 5th diode D5, the anode of the 5th diode D5 connects button and detects data wire KEY, the second end of four function button K1, K2, K3, K4 is all connected with ground wire GND.
The circuit box structure of isolator 2 ' in the present embodiment, as shown in Figure 9.It has a single-chip microcomputer 21 ' with multiple mould/number conversion inputs (CPU that for example model is ST12C5A60S2), the RS485 interface socket 22 ' of the access (abbreviation seals in) of connecting with network cable and one connect with network cable and pick out the RS485 interface socket 23 ' of (abbreviation is gone here and there out), an and power-switching circuit 24 ', a communication chip 25 ' (RS485 communication chip), an audio frequency and video commutation circuit 26 ' (please supplement the model of this device), multiple extension set interface circuits 27 '-1, 27 '-2 ... 27 '-n and a short-circuit detecting circuit 28 '.
The RS485 interface socket 22 ' and the RS485 interface socket 23 ' of going here and there out that seal in are 8 pin sockets, and the corresponding pin of their each identical numbering is connected.The terminal of the terminal of the terminal of the terminal of have+27V DC power supply and ground wire thereof, audio signal data line and ground wire thereof, video signal data line and ground wire thereof, communication data line and ground wire thereof on the RS485 interface socket 22 ' sealing in.
The RS485 interface socket 22 ' go up+27V DC power supply sealing in and the terminal of ground wire thereof connect respectively the input port of power-switching circuit 24 ', the output port You San road direct current output of power-switching circuit 24 '.Wherein, the first via is+5V and ground wire thereof, to single-chip microcomputer 21 ', communication chip 25 ', audio frequency and video commutation circuit 26 ', each extension set interface circuit 27 '-1,27 '-2 ... 27 '-n and short-circuit detecting circuit 28 ' power supply.The second tunnel is+12V and ground wire thereof, to short-circuit detecting circuit 28 '+12V branch road and ground wire power supply thereof.Third Road is+15V and ground wire thereof, to short-circuit detecting circuit 28 '+15V branch road and ground wire power supply thereof.
Communication chip 25 ' has two two-way data communication port.The upper communication data line of RS485 interface socket 22 ' sealing in and the terminal of ground wire thereof are connected with the first port of communication chip 25 ' respectively, and the second port of communication chip 25 ' connects the communication data I/O port 211 ' of single-chip microcomputer 21 '.Single-chip microcomputer 21 ' carries out the exchange of control information and response message through communication chip 25 ' and the supervisor 4 (or miscellaneous equipment) on external network cable (surpassing 5 class lines 3 in Fig. 1).
Audio frequency and video commutation circuit 26 ' has master data port, control input end and divided data port; Master data port has audio signal data line and video signal data line, and divided data port also has its corresponding audio signal data line and video signal data line.On control input end, under the control of control signal, the audio signal data line on master data port and the signal of video signal data line are communicated with or disconnect with audio signal data line and the video signal data line of divided data port respectively.
As shown in figure 10, there are frequency switch circuit 271 ', video switch circuit 272 ', key press detecting circuit 273 ', switching type power supply commutation circuit 274 ' and 8 core sockets 275 ' in its inside to the circuit structure of extension set interface circuit 27 '.Extension set interface circuit 27 ' has its master data port, control input end, push button signalling output, power input mouth.
The first audio signal data line that the audio signal data line of extension set interface circuit 27 ' master data port is frequency switch circuit 271 '; The second audio signal data line of frequency switch circuit 271 ' is connected with the voice signal line terminals on 8 core sockets 275 '.The first video signal data line that the video signal data line of extension set interface circuit 27 ' master data port is video switch circuit 272 '.The second video signal data line of video switch circuit 272 ' is connected with the vision signal line terminals on 8 core sockets 275 '.The button that the input of key press detecting circuit 273 ' connects on 8 core sockets 275 ' detects data line terminal, and the output of key press detecting circuit 273 ' connects the upper corresponding button of single-chip microcomputer 21 ' mould/number conversion input port 214 ' and detects input.
The power input mouth of extension set interface circuit 27 ' is the input port of power supply switch circuit 274 ', on this power input mouth+12V input and+15V input respectively with in short-circuit detecting circuit on power-switching circuit 24 ' output 28 '+12V branch road and+15V branch road is corresponding+12V output exports and be connected with+15V.On power supply switch circuit 274 ' output port+12V output and+15V output respectively+12V terminal corresponding with 8 core sockets 275 ' be connected with+15V terminal.
The control input end of the control input end of frequency switch circuit 271 ', the control input end of video switch circuit 272 ' and power supply switch circuit 274 ' connects together, and is connected with the corresponding control output end of single-chip microcomputer the 21 ' second control output end mouth 213 ' as the control input end of this extension set interface circuit 27 '.Whether upper the first audio signal data line of frequency switch circuit 271 ' that this extension set interface circuit 27 ' is controlled in this control output end of single-chip microcomputer the 21 ' second control output end mouth 213 ' is communicated with the upper voice signal line terminals of 8 core socket 275 ', whether the upper first video signal data line of video switch circuit 272 ' of this extension set interface circuit 27 ' is communicated with the upper video signal cable terminal of 8 core sockets 275 ', on the power supply switch circuit 274 ' input port of this extension set interface circuit 27 '+12V input and+15V input whether+12V lead-out terminal corresponding with 8 core sockets 275 ' be connected with+15V lead-out terminal.The effect of power supply switch circuit 274 ' be realize under the control of single-chip microcomputer 21 ' on input port+12V input and+15V input respectively+12V lead-out terminal corresponding with 8 core sockets 275 ' and+connection or disconnection between 15V lead-out terminal; Its structure is known technology.
The terminal of the upper audio signal data line of RS485 interface socket 22 ' sealing in and terminal, video signal data line and the ground wire thereof of ground wire thereof respectively with terminal connection corresponding on the master data port of audio frequency and video commutation circuit 26 ', the divided data port of audio frequency and video commutation circuit 26 ' and each extension set interface circuit 27 '-1,27 '-2 ... the master data port of 27 '-n connects, and the control input end of audio frequency and video commutation circuit 26 ' connects the first control output end mouth 212 ' of single-chip microcomputer 21 '.Audio frequency and video commutation circuit 26 ' under the control of single-chip microcomputer the 21 ' first control output end mouth 212 ', by the audio signal data line of master data port and video signal data line respectively with each extension set interface circuit 27 '-1,27 '-2 ... the audio signal data line of the master data port of 27 '-n, video signal data line are done corresponding connection.Each control output end of the second control output end mouth 213 ' of single-chip microcomputer 21 ' connects respectively the control input end of corresponding extension set interface circuit 27 ', under the control of single-chip microcomputer the 21 ' second control output end mouth 213 ', audio signal data line, the video signal data line difference correspondence of himself master data port are communicated with the upper voice signal line terminals of its inner 8 core sockets 275 ', vision signal line terminals by chosen extension set interface circuit 27 '.Simultaneously chosen extension set interface circuit 27 ' by power supply switch circuit 274 ' input port+12V input and+15V input respectively+12V lead-out terminal corresponding with 8 core sockets 275 ' be connected with+15V lead-out terminal.8 core sockets 275 ' of each extension set interface circuit 27 ' pass through respectively outside corresponding 8 core cables (being Internal cable 9 ') and are connected with 8 core sockets 11 ' of corresponding resident family indoor set 1 '.
As shown in figure 11, its input KEY and output KJC are connected one end of pull-up resistor R20, the other end connection+5V input terminal of pull-up resistor R20 to the circuit structure of key press detecting circuit 273 ' jointly.When use, please refer to the key circuit 16 ' of indoor set 1 ' shown in Fig. 8:
In the time that hand-free call key K1, unlock key K2, video monitor key K3 and the alarm calls key K4 of key circuit 16 ' in corresponding indoor set 1 ' are not all pressed, five diode D1, D2, D3, D4, D5 are serially connected between the input KEY of ground wire GND and key press detecting circuit 273 ', and the voltage of key press detecting circuit 273 ' input KEY and output KJC is 0.7V X5=3.5V.
In the time that the hand-free call key K1 of key circuit 16 ' in corresponding indoor set 1 ' is pressed, the second diode D2, the 3rd diode D3, the 4th diode D4, the 5th diode D5 are serially connected between the input KEY of ground wire GND and key press detecting circuit 273 ', and the voltage of key press detecting circuit 273 ' input KEY and output KJC is 0.7V X4=2.8V.
In the time that the unlock key K2 of key circuit 16 ' in corresponding indoor set 1 ' is pressed, the 3rd diode D3, the 4th diode D4, the 5th diode D5 are serially connected between the input KEY of ground wire GND and key press detecting circuit 273 ', and the voltage of key press detecting circuit 273 ' input KEY and output KJC is 0.7V X3=2.1V.
In the time that the video monitor key K3 of key circuit 16 ' in corresponding indoor set 1 ' is pressed, the 4th diode D4, the 5th diode D5 are serially connected between the input KEY of ground wire GND and key press detecting circuit 273 ', and the voltage of key press detecting circuit 273 ' input KEY and output KJC is 0.7V X2=1.4V.
In the time that the alarm calls key K4 of key circuit 16 ' in corresponding indoor set 1 ' is pressed, only have the 5th diode D5 to be serially connected between the input KEY of ground wire GND and key press detecting circuit 273 ', the voltage of key press detecting circuit 273 ' input KEY and output KJC is 0.7V X1=0.5V.
The button that each input of the digital-to-analogue conversion input port 214 ' of single-chip microcomputer 21 ' connects respectively corresponding extension set interface circuit 27 ' detects output (being the output KJC of key press detecting circuit 273 '), single-chip microcomputer 21 ' is by detecting the analysis of output end voltage to the button of any one extension set interface circuit 27 ', can directly draw the state information of hand-free call key K1, unlock key K2, video monitor key K3, alarm calls key K4 in the corresponding indoor set 1 ' key circuit 16 ' of this extension set interface circuit 27 ', and carry out accordingly corresponding control operation.
Short-circuit detecting circuit 28 ' inner+the short-circuit detecting output of 12V branch road and+power detection signal port 215 ' that the short-circuit detecting output of 15V branch road is connected respectively single-chip microcomputer 21 ' goes up corresponding input terminal.Short-circuit detecting circuit 28 ' inner+12V branch road provides whether outside+12V electricity consumption loop to have the information of short circuit obstacle to the power detection signal port 215 ' of single-chip microcomputer 21 ' on the one hand, on the other hand to provide+12V of each extension set interface circuit 27 ' DC power supply.Short-circuit detecting circuit 28 ' inner+15V branch road provides whether outside+15V electricity consumption loop to have the information of short circuit obstacle to the power detection signal port of single-chip microcomputer 21 ' on the one hand, on the other hand to provide+15V of each extension set interface circuit 27 ' DC power supply.
Now in the short-circuit detecting circuit 28 ' shown in Figure 12+15V branch road describes as example, in its input port+15VIN and two terminals of ground wire+15VGND thereof respectively with power-switching circuit 24 '+terminal that 15V output port is corresponding connects.+ 15V input+15VIN is through outwards output+15V DC power supply of a detection resistance R 11, and be somebody's turn to do+15V DC power supply terminal+15V is connected with the positive pole of isolating diode D10; The negative pole of isolating diode D10 is connected with the negative pole of voltage stabilizing didoe Z10; The positive pole of voltage stabilizing didoe Z10 connects one end of base resistance R13, the other end of base resistance R13 for example, is connected with the base stage of NPN type triode Q1 (model is S8050) and one end of biasing resistor R14, and the emitter of triode Q1 is connected common ground GND with the other end of biasing resistor R14.Collector electrode connection+15V short-circuit detecting output+15VJC of triode Q1 and one end of collector resistance R12, the other end connection power-switching circuit 24 of collector resistance R12+5V lead-out terminal.Common ground GND connects respectively the ground wire terminal of power-switching circuit 24+5V ground wire terminal and this circuit+15V output.
At ordinary times, outside+15V electricity consumption loop does not have short circuit obstacle, detect the electric current passing through in resistance R 11 limited, voltage drop in detection resistance R 11 is very little, the base voltage of triode Q1 is higher than its conducting voltage, triode Q1 conducting, its collector electrode and+to detect the voltage of output+15VJC be the low level that approaches common ground GND level to 15V.The low level of power detection signal port 215 ' the upper corresponding input terminal level of single-chip microcomputer 21 '.Single-chip microcomputer 21 accordingly can to outside+15V electricity consumption loop provide+15V DC power supply.
When outside+15V electricity consumption loop is while having short circuit obstacle, detect the electric current passing through in resistance R 11 very large, voltage drop in detection resistance R 11 is very large, the base voltage of triode Q1 is lower than its conducting voltage, triode Q1 cut-off, its collector electrode and+voltage that 15V detects output+15VJC is the high level of approaching+5V level.The high level of power detection signal port 215 ' the upper corresponding input terminal level of single-chip microcomputer 21 '.The switching type power supply commutation circuit 274 ' that single-chip microcomputer 21 can be controlled current extension set interface circuit 27 ' in running order accordingly enters off-state, stop to outside+15V electricity consumption loop provide+15V DC power supply.
In short-circuit detecting circuit 28 '+12V branch road and+circuit structure of 15V branch road is identical, is the slightly difference of parameter of inner voltage-stabiliser tube.The parameter of the inner voltage-stabiliser tube of+12V branch road is 9V; And+parameter of the inner voltage-stabiliser tube of 15V branch road is 12V.In short-circuit detecting circuit 28+working condition of 12V branch road to+15V branch road is similar, repeat no more.
The above, be only the utility model preferred embodiment, do not limit with this scope that the utility model is implemented, and the equivalence of doing according to the technical solution of the utility model and description changes and modifies, and all should belong to the scope that the utility model is contained.
Claims (3)
1. low cost building inter-speaking device, network cable couples together the doorway machine of supervisor and building, door lock, power supply and multiple isolator, and each isolator connects corresponding indoor set through many Internal cable respectively, in isolator, there are single-chip microcomputer, power-switching circuit, communication chip, audio frequency and video commutation circuit and multiple extension set interface circuit, audio signal data line and ground wire thereof on network cable, video signal data line and ground wire thereof connect with terminal corresponding on the master data port of audio frequency and video commutation circuit respectively, the divided data port of audio frequency and video commutation circuit is connected with the master data port of each extension set interface circuit, the control input end of audio frequency and video commutation circuit connects the first control output end mouth of single-chip microcomputer, each control output end of the second control output end mouth of single-chip microcomputer connects respectively the control input end of corresponding extension set interface circuit, each extension set interface circuit is connected with corresponding resident family indoor set through corresponding internal connection line cable respectively, there are frequency switch circuit, video switch circuit and 8 core sockets in extension set interface circuit inside, the first audio signal data line that the audio signal data line of extension set interface circuit master data port is frequency switch circuit, the second audio signal data line of frequency switch circuit is connected with the voice signal line terminals on 8 core sockets, the first video signal data line that the video signal data line of extension set interface circuit master data port is video switch circuit, the second video signal data line of video switch circuit is connected with the vision signal line terminals on 8 core sockets, the control input end of frequency switch circuit, the control input end of video switch circuit connect together, and are connected with the corresponding control output end of single-chip microcomputer the second control output end mouth as the control input end of this extension set interface circuit, in indoor set, there are speaking circuit, display, key circuit, microphone and loudspeaker, it is characterized in that: Internal cable adopts 8 heart yearns, in this indoor set, there is key circuit, it has four function buttons and five diodes, five diodes are connected in series in turn in the same way, wherein minus earth line, the anode of the first diode connect the first end of the first button, the anode of the second diode connects the first end of the second button, the anode of the 3rd diode connects the first end of the 3rd button, and the anode of the 4th diode connects the first end of the 4th button, and the anode of the 5th diode connects button and detects data wire, the second end of four buttons is all connected with ground wire, single-chip microcomputer in isolator is with multiple mould/number conversion inputs, there is key press detecting circuit extension set interface circuit inside in isolator, the input of this key press detecting circuit and output are jointly connected button on one end and this extension set interface circuit 8 core sockets of pull-up resistor and detect button corresponding on data line terminal and single-chip microcomputer mould/number conversion input port and detect input, and the other end of pull-up resistor connects the positive pole of this extension set interface circuit DC power supply.
2. low cost building inter-speaking device according to claim 1, is characterized in that: in described isolator also have short-circuit detecting circuit, this short-circuit detecting circuit have+12V branch road and+15V branch road; Described single-chip microcomputer has power detection signal port; This short-circuit detecting circuit inside+the short-circuit detecting output of the short-circuit detecting output of 12V branch road and+15V branch road is connected respectively corresponding input terminal on the power detection signal port of this single-chip microcomputer; The output port of the power-switching circuit in described isolator respectively to short-circuit detecting circuit+12V branch road and ground wire thereof ,+15V branch road and ground wire power supply thereof; The low level of corresponding input terminal level on the power detection signal port of this single-chip microcomputer, the inner switching type power supply commutation circuit in addition of described extension set interface circuit, on the input port of this power supply switch circuit+12V input and+15V input respectively with in this short-circuit detecting circuit+12V branch road is corresponding with+15V branch road+12V output and+15V exports and is connected, on this power supply switch circuit output port+12V output and+15V output respectively+12V terminal corresponding with this extension set interface circuit 8 core sockets be connected with+15V terminal; This power supply switch circuit control input end connects the control input end of this extension set interface circuit, and is connected with the corresponding control output end of single-chip microcomputer the second control output end mouth.
3. low cost building inter-speaking device according to claim 2, it is characterized in that: described short-circuit detecting circuit+15V branch road input port and power-switching circuit+the corresponding connection of 15V output port, + 15V input is through outwards export+15V of a detection resistance DC power supply, and be somebody's turn to do+15V DC power supply terminal is connected with the positive pole of isolating diode; The negative pole of this isolating diode is connected with the negative pole of voltage stabilizing didoe; The positive pole of voltage stabilizing didoe connects one end of base resistance, and the other end of this base resistance is connected with the base stage of NPN type triode and one end of biasing resistor, and the emitter of this triode is connected common ground with the other end of this biasing resistor; Collector electrode connection+15V short-circuit detecting the output of this triode and one end of collector resistance, the other end of this collector resistance connects the DC power supply positive electrode of this extension set interface circuit; This common ground connects respectively the DC power supply ground wire terminal of this extension set interface circuit and the ground wire terminal of this circuit+15V output; In short-circuit detecting circuit+12V branch road and+circuit structure of 15V branch road is identical, the parameter that is inner voltage-stabiliser tube is slightly different, the parameter of+12V branch road inside voltage-stabiliser tube is 9V; And+parameter of the inner voltage-stabiliser tube of 15V branch road is 12V.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420303254.6U CN203912096U (en) | 2014-06-09 | 2014-06-09 | Low-cost building intercom device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420303254.6U CN203912096U (en) | 2014-06-09 | 2014-06-09 | Low-cost building intercom device |
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| CN203912096U true CN203912096U (en) | 2014-10-29 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106506025A (en) * | 2016-12-29 | 2017-03-15 | 帝信科技股份有限公司 | SIP intercoms |
| CN113179381A (en) * | 2021-03-22 | 2021-07-27 | 北京金茂绿建科技有限公司 | Call method and repeater |
-
2014
- 2014-06-09 CN CN201420303254.6U patent/CN203912096U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106506025A (en) * | 2016-12-29 | 2017-03-15 | 帝信科技股份有限公司 | SIP intercoms |
| CN113179381A (en) * | 2021-03-22 | 2021-07-27 | 北京金茂绿建科技有限公司 | Call method and repeater |
| CN113179381B (en) * | 2021-03-22 | 2022-11-11 | 北京金茂人居环境科技有限公司 | Call method and repeater |
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