CN102186053A - User programmable building talk-back system - Google Patents
User programmable building talk-back system Download PDFInfo
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- CN102186053A CN102186053A CN2011100619944A CN201110061994A CN102186053A CN 102186053 A CN102186053 A CN 102186053A CN 2011100619944 A CN2011100619944 A CN 2011100619944A CN 201110061994 A CN201110061994 A CN 201110061994A CN 102186053 A CN102186053 A CN 102186053A
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Abstract
The invention discloses a user programmable building talk-back system comprising a singlechip, an external E2PROM (Electrically Erasable Programmable Read-Only Memory), a comparator, a keyboard and the like, wherein the singlechip continuously scans the keyboard after recovering and entering the normal working state; the singlechip receives the keyboard room number coding mode and converts a room number into serial signals, and transmits the serial signals to the comparator in an extension by a periphery circuit, so that the serial signals are compared with the prearranged codes in the comparator; if the serial signals are equal to the prearranged codes, control signals are output; a corresponding electronic switch is driven to switch on an audio circuit and a video circuit when the singlechip judges whether the extension exists or has short circuit or open circuit or empty number according to the state of the comparator. The keyboard has the function of inputting room number and also has the function of unlocking by codes and changing the code; the singlechip judges the function to be executed according to the first key input by the keyboard; the E2PROM memories the code of each user; and the code can be changed conveniently and can not lost even when the power is shut down. The user programmable building talk-back system achieves the purpose that each user needs to have a changeable code during the application.
Description
Technical field
The present invention relates to a kind of intercom system of intelligent building technical field, specifically, what relate to is a kind of building conversational system of user-programmable.
Background technology
Building conversational system is to adopt cell networking formula building conversational system, in each dwelling house doorway and man of resident family, visible dialogue system is installed, identify identity with the realization visitor and reach and resident family's intercommunication, resident family's remote-controlled unlatching dwelling house door, thus prevent that effectively unauthorized person from advancing in people's residential building.
The existing history about ten years of building conversational system development, wherein the digital-code type system is simple because of wiring, many and the occasion extensive use of having relatively high expectations of controlled amount, system host carries out the transition to from early stage employing standard digital circuitry control and all adopts Single-chip Controlling now basically, the at present general equal control that can finish keyboard processing, intercommunication, automatically controlled function such as unblank needs revisable unlocking cipher of each household but can may run in the practical application; Generally to increase type or revise design and could realize.
Through being retrieved, prior art finds, China's application number: 01127744.0, the applying date: 2001-08-17, building visual is to the information issuing system of making peace, this patent provides a kind of building visual to the information issuing system of making peace, " by some indoor sets; some decoders; some doorway machine; power supply and relevant line; and supervisor and computer are formed; include talkback circuit, video circuit, the liquid crystal dot matrix display circuit, warning circuit, and surveillance, gate control system, it is characterized in that above-mentioned decoder, doorway machine and supervisor include data transmit-receive circuit and control circuit separately; The central processing unit of these decoders, doorway machine and supervisor is 51 series monolithics that burning has automatic control program separately, the software, the plug-in card system that are equiped with the transmitting-receiving storage on computers and handle, and doorway machine is visual doorway machine; Adopt 485 data/address bus system communication modes, with above-mentioned indoor set, decoder, doorway machine and be arranged on the supervisor and the computer networking of center, decode by decoder, and detect, the control relevant device; Supervisor, doorway machine and indoor set are connected, realize mutual communication; Realize collecting and recording and playback of image, sound, and the issue of sub-district public information, an incorporate system formed.But " still will increase type in this patented technology practical application or revise design and could realize revisable unlocking cipher of each household.
Summary of the invention
The objective of the invention is to solve above-mentioned deficiency of the prior art, a kind of building conversational system of user-programmable is provided, can finish the control of keyboard processing, intercommunication, automatically controlled function such as unblank, need the practical problem of a revisable unlocking cipher of each household during emphasis has solved and used.
For realizing above-mentioned purpose, the building conversational system of user-programmable of the present invention comprises single-chip microcomputer, E
2PROM external memory, comparator, keyboard and charactron display, interface circuit, audio frequency and video circuit, extension set.Wherein:
Described keyboard is connected with single-chip microcomputer by interface circuit, is used to import room number, and has password unlocking and change cryptographic function;
Described comparator is connected with single-chip microcomputer, is used to detect the extension set state, and testing result is fed back to single-chip microcomputer;
Described audio frequency and video circuit are connected with single-chip microcomputer, are used for audio session and video monitor;
Described E
2PROM preserves each user's password after the user revises password by single-chip microcomputer;
Described single-chip microcomputer is connected with above-mentioned parts, and control whole system operation: single-chip microcomputer enters after the normal operating conditions constantly keyboard scan after resetting, receive keyboard room number coding mode, room number is converted to serial signal, and be transferred to by peripheral circuit in the comparator of extension set and compare with preset coding, if equate then to export control signal, drive corresponding electronic switch and open audio frequency and video circuit, this moment, single-chip microcomputer judged by the state of comparator whether extension set exists, whether short circuit, whether open a way or spacing: if extension set exists, single-chip microcomputer is sent bell signal, divides power ringing, if short circuit or open circuit, then sending shuts down behind the corresponding prompt sound resets, single-chip microcomputer is during ring, and the continuous state of detection comparator is judged whether extension set selects a good opportunity to answer, as ring unanswered in the time of setting, then shutdown resets automatically; Answer as extension set off-hook in the time of setting, then single-chip microcomputer stops to send bell signal, and opens speaking circuit, in the air time, single-chip microcomputer is the detection comparator state again, waits for unlock instruction, export the drive signal of unblanking after receiving unlock instruction, electric lock is carried out unlocking action.
Described single-chip microcomputer judges carry out what function according to first key of keyboard input, if first key input * key, if the password of then indicating to change is first key input #, the password unlocking of then indicating is if first key input digit then indicates to call out some resident families.
Compared with prior art, the present invention is simple in structure, visitor easy to use can import resident family by keyboard and number call out certain resident family, bearer identity is understood by monitor and intercom system by resident family, can open gate lock after the affirmation, resident family also can unblank to enter at ordinary times by password, also can change password, and all functions realize by Single-chip Controlling.The native system key technology is that the running software mode in the single-chip microcomputer can be by user program, needs the practical problem of a revisable unlocking cipher of each household during emphasis has solved and used.
Description of drawings
Fig. 1 is the present invention's one Application Example overall schematic.
Fig. 2 is the equivalent circuit diagram of comparator in one embodiment of the invention.
Embodiment
The technical solution of the present invention is further explained below in conjunction with drawings and Examples, but following content is not intended to limit the scope of the invention.
As shown in Figure 1, the present invention's one Application Example overall schematic.This system forms wiring mode by doorway main frame, extension set, floor decoder, electric control lock, power source special: main frame to floor decoder is five buses, and it is nonpolarity that decoder is divided into the two wires to the user.Line system characteristics: route bus is simple, and line two wires, branch family is nonpolarity is convenient to wiring, and the subscribers feeder short circuit does not influence whole system, and is easy to maintenance.
Concrete, the hardware of this system is formed and is comprised single-chip microcomputer, E
2PROM external memory, comparator, keyboard and charactron display, interface circuit, audio frequency and video circuit, extension set.Wherein: single-chip microcomputer enters after the normal operating conditions constantly keyboard scan after resetting, receive keyboard room number coding mode, room number is converted to serial signal, and be transferred to by peripheral circuit in the comparator of extension set and compare with preset coding, if equate then to export control signal, drive corresponding electronic switch and open audio frequency and video circuit, this moment, single-chip microcomputer judged by the state of comparator whether extension set exists, whether whether short circuit opens a way or spacing.If extension set exists, single-chip microcomputer is sent bell signal, divide power ringing, if short circuit or open circuit, then sending shuts down behind the corresponding prompt sound resets, and single-chip microcomputer is during ring, the state of continuous detection comparator, judge whether extension set selects a good opportunity and answer that as ring unanswered in the time of setting, then shutdown resets automatically; Answer as extension set off-hook in the time of setting, then single-chip microcomputer stops to send bell signal, and opens speaking circuit, in the air time, single-chip microcomputer is the detection comparator state again, waits for unlock instruction, export the drive signal of unblanking after receiving unlock instruction, electric lock is carried out unlocking action.Like this, just finished the one action process.
Described keyboard input is except room number, also have password unlocking and change cryptographic function, single-chip microcomputer can judge carry out what function according to first key of keyboard input, if first key input * key, the password of then indicating to change, if first key input # key, the password unlocking of then indicating is if first key input digit then indicates to call out some resident families.
In the present embodiment, select MCS51 series monolithic 89C51 for use, this chip is made with CMOS technology, and is low in energy consumption; The I/O port has bigger load capacity, pulls out electric current and can reach 25mA, can simplify peripheral circuit; The execution speed height; And have advantages such as program encryption is good, price is cheap.In native system,, finish following function through software programming: keyboard scan, charactron drive show, code signal is synthetic, extension set state recognition, bell signal generation, system's setting, switching signal processing, password unlocking etc.
In the present embodiment, comparator is used for the extension set status detection, whether exist as extension set, and whether short circuit, off-hook or on-hook etc. is all undertaken by comparator.The result of comparator is input to two pin PI.2 of 89C51, and P1.3, software detect the state of these two pins in due course, just can judge the operating state of extension set.
As shown in Figure 2, the principle of equal effects circuit of comparator.U among the figure
1With extension set switch SW l; With off-hook switch SW 2: state relevant.When SW1 presses or U1=0 during to the incoming line short circuit of extension set; Work as SW2: during a switch transition, or the incoming line of extension set when open circuit U
1=9V; When switch SW 2, be in normally closed and normally opened contact between during the switch transition, 3V＜U then
1＜6V.U
1These three kinds of voltages by comparator relatively after, convert digital quantity to, the machine-readable people of monolithic is arranged and judges the extension set state.U
1Transformation result is as shown in table 1.
Table 1
Although occur the corresponding a kind of transformation result of several states of extension set shown in the table, because several states are in a different phase in the course of work, therefore, the software of single-chip microcomputer can identify the concrete state of extension set exactly.
In the present embodiment, keyboard adopts the 2x8 matrix keyboard interface of latch 74LS373 overlap joint to be connected on the system bus, its address is 400H, 74LS373 is as the outer RAM of sheet, by chip selection signal with its gating, then its key-press status is read in from bus, the Pl of 89C51,4 and the Pl.5 mouth as the output scanning line.
In the present embodiment, LED shows employing MC14499, and this chip has the ability of 4 light-emitting diode displays of management, mainly comprises 1 20 shift register in the sheet, 1 latch, 1 multichannel follower., behind segment decoder, convert 7 segment encode sections of delivering to and decimal point driver to and export by the binary-coded decimal of multichannel follower output.The each 20 Bits Serial input data that receive of MC14499, wherein 16 bit representation 4AI4 position binary-coded decimals, 4 bit representation decimal points selection position in addition.MC1449 has the input and latch function, so a frame serial data just is latched after input, will remain unchanged later on, uses for 4 light-emitting diode displays, till the input of next frame serial data.
CPU only need provide the display data, and the demonstration of data is carried out dynamic scan by interface chip to everybody and realized.MC14499 is a kind of serial input interface chip, so be easy to the interface of 89C51, because 89C51 itself has serial input and output mouth, therefore the 89C51 serial port can be programmed for shift register mode (mode 0), the CLK of serial data transmitting terminal TXD and MC14499 joins, and shift clock is provided; The serial data input D of serial data receiving terminal RXD and MC14499 joins, with the output serial data; And join with the Enable Pin of PI.l mouth line and MC1449, produce enable signal.This interface mode is simple and clear, and programming easily.
In the present embodiment, electricity consumption erasable programmable read memory (E
2PROM) preserve each user's password, the change password is convenient, and power down can not lost yet.Each resident family can be realized by mcu programming by the password of numeric keypad change oneself.The password of resident family change oneself, but the * key on the keypad, the own resident family's number of input then, the own Old Password identity for confirmation of input just allows the change password after Old Password is correct again, presses # affirmation and preservation new password after importing new password.
In the present embodiment, the Men Hao of resident family (as 031) with the input of mcu programming scanning digital keyboard presses the # key then, and single-chip microcomputer is opened the monitor and the intercom system of this resident family by control line, and jingle bell notice resident family has the people visiting.Resident family also can provide intercom system to confirm messenger's identity by monitor, presses the electric control lock that unlock key is opened the gate then, and the visitor just can advance the people.
Claims (6)
1. the building conversational system of a user-programmable is characterized in that comprising single-chip microcomputer, E
2PROM external memory, comparator, keyboard and charactron display, interface circuit, audio frequency and video circuit, extension set; Wherein:
Described keyboard is connected with single-chip microcomputer by interface circuit, is used to import room number, and has password unlocking and change cryptographic function;
Described comparator is connected with single-chip microcomputer, is used to detect the extension set state, and testing result is fed back to single-chip microcomputer;
Described audio frequency and video circuit are connected with single-chip microcomputer, are used for audio session and video monitor;
Described E
2The PROM external memory is connected with single-chip microcomputer, after the user revises password by single-chip microcomputer, preserves each user's password;
Described single-chip microcomputer is connected with above-mentioned parts and controls whole system operation: single-chip microcomputer enters after the normal operating conditions constantly keyboard scan after resetting, receive keyboard room number coding mode, room number is converted to serial signal, and be transferred to by peripheral circuit in the comparator of extension set and compare with preset coding, if equate then to export control signal, drive corresponding electronic switch and open audio frequency and video circuit, this moment, single-chip microcomputer judged by the state of comparator whether extension set exists, whether short circuit, whether open a way or spacing: if extension set exists, single-chip microcomputer is sent bell signal, divide power ringing, if short circuit or open circuit, then sending shuts down behind the corresponding prompt sound resets, and single-chip microcomputer is during ring, the state of continuous detection comparator, judge whether extension set selects a good opportunity and answer that as ring unanswered in the time of setting, then shutdown resets automatically; Answer as extension set off-hook in the time of setting, then single-chip microcomputer stops to send bell signal, and opens speaking circuit, in the air time, single-chip microcomputer is the detection comparator state again, waits for unlock instruction, export the drive signal of unblanking after receiving unlock instruction, electric lock is carried out unlocking action.
2. the building conversational system of user-programmable according to claim 1, it is characterized in that: described single-chip microcomputer judges carry out what function according to first key of keyboard input, if first key input * key, the password of then indicating to change, if first key input #, the password unlocking of then indicating is if first key input digit then indicates to call out some resident families.
3. the building conversational system of user-programmable according to claim 1, it is characterized in that: described single-chip microcomputer is selected MCS51 series monolithic 89C51 for use.
4. the building conversational system of user-programmable according to claim 1, it is characterized in that: described keyboard adopts the 2x8 matrix keyboard interface of latch 74LS373 overlap joint to be connected on the system bus, its address is 400H, 74LS373 is as the outer RAM of sheet, by chip selection signal with its gating, then its key-press status is read in from bus, the Pl of 89C51,4 and the Pl.5 mouth as the output scanning line.
5. the building conversational system of user-programmable according to claim 1, it is characterized in that: the result of described comparator is input to two pin PI.2 of 89C51, P1.3, the state of these two pins of software detection just can be judged the operating state of extension set.
6. the building conversational system of user-programmable according to claim 1 is characterized in that: described charactron display adopts MC14499, and this chip has the ability of 4 light-emitting diode displays of management.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100619944A CN102186053A (en) | 2011-03-15 | 2011-03-15 | User programmable building talk-back system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011100619944A CN102186053A (en) | 2011-03-15 | 2011-03-15 | User programmable building talk-back system |
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| CN102186053A true CN102186053A (en) | 2011-09-14 |
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| CN2011100619944A Pending CN102186053A (en) | 2011-03-15 | 2011-03-15 | User programmable building talk-back system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103414961A (en) * | 2013-08-16 | 2013-11-27 | 厦门兴联科技有限公司 | Building talkback terminal with two nonpolar lines |
| CN103729918A (en) * | 2013-12-06 | 2014-04-16 | 朱佩芬 | Residential area electronic access control system |
| CN108320752A (en) * | 2018-01-26 | 2018-07-24 | 青岛易方德物联科技有限公司 | Cloud Voiceprint Recognition System and its method applied to community gate inhibition |
| CN111182164A (en) * | 2019-12-20 | 2020-05-19 | 四川东方瑞呈科技有限公司 | Emergency street call system |
-
2011
- 2011-03-15 CN CN2011100619944A patent/CN102186053A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103414961A (en) * | 2013-08-16 | 2013-11-27 | 厦门兴联科技有限公司 | Building talkback terminal with two nonpolar lines |
| CN103729918A (en) * | 2013-12-06 | 2014-04-16 | 朱佩芬 | Residential area electronic access control system |
| CN108320752A (en) * | 2018-01-26 | 2018-07-24 | 青岛易方德物联科技有限公司 | Cloud Voiceprint Recognition System and its method applied to community gate inhibition |
| CN108320752B (en) * | 2018-01-26 | 2020-12-15 | 青岛易方德物联科技有限公司 | Cloud voiceprint recognition system and method applied to community access control |
| CN111182164A (en) * | 2019-12-20 | 2020-05-19 | 四川东方瑞呈科技有限公司 | Emergency street call system |
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Application publication date: 20110914 |