CN2188825Y

CN2188825Y - Bus type wired intercommunicating apparatus

Info

Publication number: CN2188825Y
Application number: CN94200734U
Authority: CN
Inventors: 李晋臣
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-01-20
Filing date: 1994-01-20
Publication date: 1995-02-01
Anticipated expiration: 2004-01-20

Abstract

The utility model relates to a bus type wired intercommunicating apparatus, which is used for the construction of the unit type building and is particularly used for building residential districts with high layer. The utility model is composed of a power circuit, the coding circuit of a keyboard, the speak-back circuit of a host machine, the code translation of an auxiliary machine, and a speak-back circuit. The code translation of the auxiliary machinery, the speak-back circuit, and buttons for opening a door are arranged inside the home of a user. Other circuits are arranged inside a rectangle box and are arranged on the building door by the connection of wire. The utility model uses a binary keyboard for code and a 4-16 decoder for code translation. 16 users just need four bus out. The utility model reduces the number of output wires for reducing cost and improving the transmission quality.

Description

Bus type wired intercommunicating apparatus

The utility model relates to a kind of bus type wired intercom device, is applicable to the unit building constructions, particularly the high-rise building residential area.

Existing talkback unit is the single line transmission, and every increase by one user need increase a line, and the user is a lot, and then output line increases slightly, causes mounting cost to increase, and transmission quality descends.

It is a kind of that the purpose of this utility model is to provide, and loses bus type wired intercom device little, that Installation and Debugging convenient, cost is low, transmission quality is good.

Realize that the technical measures that the purpose of this utility model is taked are: in the host circuit of building door, adopt keyboard, comparator, NOR gate, NAND gate to finish keyboard coding, realize 4 bus parallel outputs, on subsidiary engine, adopt the 4-16 decoder for decoding, connect the electric bell chip through power amplifier, such 16 tame users only need 4 bus 32 families only to need 8 buses, by that analogy; Every family expenses are provided with a button (indicator light in parallel) control building door per family and open and close, and are provided with switching circuit in the solenoid circuit of switch building door, when door is closed, and K switch ₁Make electromagnet be in on-position, when the user presses the button, the building door is opened automatically, and each family indicator light is all bright, after the guest enters, and K switch ₁The quilt door is depressed electromagnet is opened circuit, and the building door is closed automatically, and electromagnet and user button on line are a line.

In conjunction with the accompanying drawings circuit structure of the present utility model and embodiment are described as follows:

Fig. 1 is a calcspar of the present utility model, and 1 is power circuit among the figure, the 2nd, and coding circuit, the 3rd, main frame talkback circuit, the 4th, subsidiary engine decoding, talkback circuit; Fig. 2 is a power circuit diagram; Fig. 3 is the embodiment circuit diagram of keyboard coding; Fig. 4 is a main auxiliary machine intercommunication embodiment circuit diagram, (for main frame, upward being subsidiary engine down).

See Fig. 1, the utility model is by power circuit 1, coding circuit 2, and main frame talkback circuit 3 and subsidiary engine decoding, talkback circuit 4 are formed, and former three is arranged on Lou Menchu in a rectangular box, and its output is deciphered with each subsidiary engine, talkback circuit is connected.

See Fig. 2 power circuit, the 220V alternating current connects the former limit of transformer, and paying a limit has two outputs one to be the 24V interchange, and an end of its output connects the switch of solenoid circuit, other end ground connection, the electromagnet other end and ground connection after each subsidiary engine upward-acting door button is in parallel; Another exchanges output for 8V, connects the input of full-wave rectifier, and two outputs of rectifier are exported direct current 5V operating voltage after capacitor filtering and chip 7805 voltage stabilizings, supplies with coding, the main and auxiliary machine talkback circuit of decoding.

See Fig. 3 ,+5V voltage is added on keyboard of each row, by making the D point charged by in 16 buttons any, by comparator U ₇, and U ₁₅Make the indicator light LED of place, gate bright, the line of keyboard and alignment respectively with comparator U ₁U ₇An end be connected ,+5V is through R ₅(A point) and U ₄, U ₅, U ₆Anode link to each other, again through R ₆(B point) and U ₁, U ₂, U ₃Negative terminal link to each other, again through R ₇(C point) and U ₇Negative terminal links to each other, comparator U ₁Output termination U ₈An end, U ₂Output termination U ₉An end, U ₃Output meet U simultaneously ₈, U ₉The other end, U ₆Output termination U ₁₁An end, U ₅Output termination U ₁₀An end, U ₄Output meet U simultaneously ₁₀, U ₁₁The other end, U ₈, U ₉, U ₁0, U ₁₁Output and 7401 NAND gate U ₁₆U ₁₉An end link to each other U ₁₆U ₁₉Another termination power end, U ₁₆U ₁₉Output be 0,1,2,3 is the keyboard coding output, during button, each row voltage is 0V on D point and the keyboard, and each column voltage is 5V, presses the lower keyboard key, reduce to this value (3V) from the voltage that 0V rises to its vertical join line of certain value (as 3V) from 5V as voltage not at the horizontal line in first Xingqi, by comparator LM339 output level and power all can be met the demands, employing comparator LM339 and chip 7402,7401 carry out the binary coding of keyboard, by " NOR gate " U ₈U ₁₁Through 7401 open collector NAND gate U ₁₆U ₁₉With code signal from 0,1,2, the output of 3 ends, to four inputs that are attached thereto the 4-16 decoder (i.e. 4514 chips) on the subsidiary engine that connects, the output of decoder is transported to the electric bell chip that this presses the key correspondence after power amplifier 8778 amplifies, by binary coding, article four, line is represented 16 numbers, except the button of first row, first row, has 15 buttons, represent 15 room numbers, embodiment has represented the bus type wired intercom device of 18 room numbers, three room numbers is arranged with 7,8,9 three switches, through NAND gate U ₁₂, U ₁₃, U ₁₄Be connected with 4,5,6 respectively, press any button and will amplify the electric bell chip connection that makes this family through power amplifier 8778.

See Fig. 4, the power supply of decoding circuit 4514 is+5V, by keyboard

coding circuit output

0,1,2,3 are connected with four inputs of decoding circuit respectively, and the 4-16 decoder is deciphered so that determine it is that user is accessed the coding disk at place, bottom of the building gate, (is K switch when owner picks up the handle casing ₂Make+5V is connected with audio-frequency power amplifier), the subsidiary engine talkback unit is connected, and aims at microphone M ₂When speaking, loud speaker Y ₁Sound.Be distributed in the subsidiary engine talkback circuit and main frame talkback circuit in each user family, the first half has a double-pole switch, when not having the guest to come to visit, and the position of the switch is downward, promptly gives decoder 4514 energisings, and 4514 output meets the tinkle of bells chip U through 8778 power amplifiers _XX, the guest presses the button on doorway, building, all decoder work, and when the user picks up the intercom phone, double-pole switch upwards, 5V is to the power supply of subsidiary engine talkback circuit, the subsidiary engine talkback circuit at this family is connected with main frame can intercommunication, and other user is identical with its structure, be the not energising of subsidiary engine talkback circuit, therefore, this user is not influence other user's with conversation downstairs, that is to say, on subsidiary engine, adopted double-pole switch just can eliminate the influence of main frame other subsidiary engine.

In the main frame talkback circuit ,+5V power supply is added to 7 ends of audio-frequency power amplifier AN7112 all the time, can talk with the subsidiary engine talkback unit at any time.

The utility model has the advantages that: adopt bus type wired intercommunicating apparatus, the line number obviously reduces, four line transmission can be distinguished 16 users, eight lines can be distinguished 32 users ... by that analogy, the line of installment and debugging reduces, the proportion quantity of output line all reduces like this, so it is little that installation and debugging conveniently, are lost, transmission quality is good.

Claims

1, a kind of bus type wired intercom device, by power supply, solenoid circuit, main and auxiliary machine talkback circuit is formed, it is characterized in that, be provided with power circuit (1) at the main frame place, keyboard coding circuit (2) and main frame talkback circuit (3), subsidiary engine is provided with decoding, talkback circuit (4)

1) power circuit (1): the 220V alternating current connects the former limit of transformer, and the 24V that pays the limit exchanges output, and an end connects the K switch of solenoid circuit ₁, an end ground connection, electromagnet and subscriber switch button on line are a line, and the 8V that pays the limit exchanges output, connects the input of full-wave rectifier, and two outputs of rectifier are output+5V direct-current working volts after capacitor filtering and chip 7805 voltage stabilizings;

2) keyboard coding circuit (2) :+5V voltage is respectively through R ₁, R ₂, R ₃And R ₄In parallel with each row keyboard, each line unit dish is respectively through R ₉, R ₁₀, R ₁₁, R ₁₂With R ₁₃, C ₁D end link to each other D end and comparator U ₇Anode link to each other, through U ₁₅, R ₂₃Link to each other with the light-emitting diode at place, gate ,+5V is through R ₅(being the A point) and U ₄, U ₅, U ₆Anode link to each other, through R ₆(being the B point) and U ₁, U ₂, U ₃Negative terminal link to each other, through R ₇(being the C point) and U ₇Negative terminal links to each other, comparator U ₁Output termination U ₈An end, U ₂Output termination U ₉An end, U ₃Output meet U simultaneously ₈, U ₉The other end, U ₆Output termination U ₁₁An end, U ₅Output termination U ₁₀An end, U ₄Output meet U simultaneously ₁₀, U ₁₁The other end, U ₈, U ₉, U ₁₀, U ₁₁Output and chip 7401 NAND gate U ₁₆U ₁₉An end link to each other U ₁₆ ₁₉Another termination power end, U ₁₆U ₁₉Output 0,1,2,3 four lines output keyboard code signals are connected with four inputs of 4-16 decoder;

3) main frame talkback circuit (3) :+5V direct voltage links to each other with 7 ends of audio-frequency power amplifier AN7112, and 6 ends are through capacitor C ₄With loud speaker Y ₁, microphone M ₁Be in series, again earth connection;

4) subsidiary engine decoding, talkback circuit (4): between decoding circuit and subsidiary engine talkback circuit double-pole switch is arranged, the supply voltage of decoder 4514 is+5V, its four inputs respectively with main frame upper keyboard coding output 0,1,2,3 are connected, and the output of decoder links to each other with the electric bell chip through power amplifier 8778, the audio-frequency power amplifier AN7112 of subsidiary engine talkback circuit, its 7 end passes through K switch ₂Link to each other with+5V power supply, 6 ends of audio-frequency power amplifier are through capacitor C ₇With loud speaker Y ₂, microphone M ₂Series connection back earth connection;

Power circuit, keyboard coding circuit and main frame talkback circuit are arranged on the place, gate of bottom of the building, and gate shift knob and subsidiary engine decoding, talkback circuit are arranged in the each household.

2, by the described bus type wired intercom of claim 1 device, it is characterized in that used comparator is the LM339 comparator.

3, by claim 1 or 2 described bus type wired intercom devices, it is characterized in that chip used in the encoder is 7402,7401 chips, used decoder is 4-16 decoder (4514 decoder).

4, by the arbitrary described bus type wired intercom device of claim 1-3, it is characterized in that, in solenoid circuit, be provided with switching circuit.