RU9539U1 - INTERCOM - Google Patents

Abstract

1. An intercom for intercoms containing a memory unit, a line status analyzer whose output is connected to the input of the memory unit, a call amplifier, the input of which is connected to the output of the memory unit, characterized in that the microprocessor loaded with a special program is used as a memory unit Integrated operational amplifiers with a stable reference voltage were used as the line state analyzer, and a transistor connected in an open collector circuit was used in the output stage of the call amplifier Oromo "and current limiter in emittera.2 chain. The device according to claim 1, characterized in that the subscribers are connected to the intercom according to the coordinate scheme. The device according to claim 1 or 2, characterized in that it is additionally equipped with a photo reader, the output of which is connected to the input of the microprocessor.

Description

INTERCOM

The proposed utility model for slope communication is communication and can be used as an intercom for intercoms.

Known device for remote signaling, containing a communication line with the transmitter and the receiver on the end., Dh. one hundred device /: also iTjHA i: / board, on KOTOpO vi there is an I: pulse switch and a matching circuit, and an executive point on which there is a matching circuit and a power supply / I /,

Known aime communication system, containing l: spawn: he, amplifier, transmitter, as well as, including. It includes a matching unit in a high-frequency unit; Koioporo includes a co-frequency / amplifier, mixers, amplifiers; frequency, detector, sound-frequency amplifier, power amplifier, penny speaker. } {po /: pogo, the system is equipped with an ini; dyroul); tsim bloo l, consisting of 11 (it consists of a loudspeaker, a power amplifier and a noise generator, and a feedback suppression unit and;. |) a rotator / 2 /,

And the number of shortcomings of the known devices:: st, includes the complexity of their design due to the content: 1 the knowledge of a large number of radio elements, high: cost, just, the complexity of the cash), the relatively unreliable reliability, limited functionality,

W {And G08B 1/08

during commissioning and maintenance, reducing costs, improving accuracy and reliability.

The specified technical problem is achieved by the fact that in the proposed intercom for DOMOTORYUV containing a memory unit, a line state analyzer, the output of which is connected to the input of the memory unit, a call amplifier, the input of which is connected to the output of the memory unit, a microprocessor is used as a memory unit, loaded on purpose; The program uses integrated operational amplifiers with a stable reference voltage as a line state analyzer, and a transistor connected in an open collector circuit and a current limiter in the emitter circuit is used in the output stage of the 5 call amplifier. In addition, the technical problem is solved due to the fact that the subscribers are connected to the intercom according to the coordinate scheme, and the intercom is additionally equipped with a photo reader, the output of which is connected to the input of the microprocessor.

The drawing shows a block diagram of the proposed intercom.

The intercom contains microprocessor I, on the internal permanent storage device of which a special program for controlling the operation and interaction of all functional elements of the intercom is recorded. The microprocessor I is connected to random-access memory 2, which stores the information received by the microprop, essor I from other elements of the intercom. The memory device 2 is capable of storing post-start information on it when the power is turned off for an unlimited time. The recording and reading of information, and from memory 2 is controlled by microprocessor I. The microprocessor I is connected to the microprocessor I block 3, the signal amplifier of the photo reader 4, the line status analyzer

5. The display unit b, amplifier 7, speaker 8, call amplifier 9, KOMiviyTaTopbi subscribers 10 and 11, electromagnetic lock control line ikl / not shown / are connected to the input, output i. A microphone amplifier 13 is connected to the input of the amplifier 7, to which, in turn, a microphone is connected 14. A photo reader 15 is connected to the amplifier 4. A half-wave rectifier 16 with a smoothing filter and a voltage stabilizer 17 with two output voltages 53 and lidB are used to power the intercom digital and analog parts respectively. The current consumed by the intercom device in standby mode does not exceed 5 mA, in talk mode it is on the order of 300 mA.

The keyboard unit 3 is designed to control the intercom and its programming. Block 3 has twelve keys digital DT O to 9 and special reset and call. The fir tree is a 3x4 matrix with sequential polling of keys. The exception is the reset button, which is directly connected to the j input of microprocessor I.

Indication block b is intended for visual display of digits of even and alphabetic information necessary for the user and programmer. As a display in block b, a five-digit seven-segment LED matrix with dynamic power supply is used.

The photo reader 15 is three pairs of emitter receiver operating in the infrared range. The photo reader 15 is designed to generate signals when opening the intercom using an optical key / not shown /.

The microphone amplifier 12, the generator of which is integrated in the communication line, is connected to the intercom with subscribers, and having the ability to switch to two load standards - 50 ohms - 150 ohms, is designed to amplify the horn signal from the microphone 14 built into the intercom and transfer it to the line communication.

- 4 Amplifier 7 of loudspeaker 8 amplifies the sound signals coming from the communication line from the subscriber, as well as special sound signals; w,: .op4viMpye: v№Te by microprocessor I in various operating modes of the intercom. In order to prevent the amplifier 7 from overloading during a call signal, one input of the amplifier 7 is temporarily blocked by a signal from microprocessors I, while a special sound signal is applied to the second input of the amplifier 7. In addition, the amplifier 7 nivieeT circuit suppression signal from the built-in microphone 14 based on a balanced bridge, This allows you to increase the overall amplification of the path in the subscriber-visitor and visitor-subscriber.

Amplifier 9 delivers into the communication line UNWISE /: the subscriber signal, which is a pulse of sound frequency with an amplitude of 123, The output of amplifier 9 is a powerful component t: an anistor connected according to the open collector circuit and a current limiter in the emitter circuit, so : disconnect su: 9 from the communication line at the end of the call signal and turn on the mode; and the conversation is necessary ;; microprocessor 1 does not generate an additional signal.

The analyzer 5, in which quality is used1: o: b0 We have integrated operation with a stable support ;;,; NAPR-KEPIEM, consists of two comparators. Analyzer 5 monitors BejiK4HHy for the constant component of the communication line at two levels - 43 and 9B, Chaprenie below 43 corresponds to the subscriber's readiness to receive a call signal, voltage from 4 to US - to talk mode, and for example 51; -ken1- from Y to y : distributing voltage to the electric:.: agntn: th lock for its opening, Formed in this way the signal from the analyzer 5 steps: from the microprocessor I, which, in accordance with the time mozhentsi includes either amplifier U or conversational ;;; path icJ amplifier - amplifier 7, or sends a signal to line 12 A voltage supply to the electric lock .agnitny. Use as an analyzer

integrated operational amplifiers with a stable reference voltage can improve the accuracy of operation and eliminate the possibility of temperature drift threshold.

Subscribers connect to the intercom at the coordinate

a circuit that includes twenty wires - nine single and

ten decimal places. Such cxefea connecting subscribers allows you to use a simpler subscriber device that does not contain a digital part, such as a handset with stand and end keys and a lock / not shown /. Using KONfMyTaTOpopoB iO and II, visitors are connected to one of two hundred subscribers according to the numbers dialed on block 3. If there are less than a hundred subscribers using one switch, more than a hundred - respectively one additional switch for every hundred subscribers, exceeding the original hundred. In the example considered in this application, it is assumed that there are more than one hundred subscribers, but their number does not exceed two hundred. Each switch has a sequential counting input, through which fault and address pulses with a difference in duration are transmitted from microprocessor I. The analog inputs of switches 1C and II are connected to the communication line. The output of each switch is a 10x10 matrix with a semiconductor BCU with telephone keys as quoting elements.

The intercom is used as follows.

The intercom has the following modes of operation:

-duty,

-connections of the visitor with the subscriber and remote opening by the subscriber of the electromagnetic lock,

-Opening the electromagnetic lock using a common code or personal; code assigned to each subscriber

- 5 indications of any characters.

The intercom in the mode of connecting the visitor to the subscriber is as follows. When typing on the keyboard of block 3, but: the subscriber’s number, this number is d-bloted on the display of block b, then pressing each key is accompanied by a short beep. With the reset button on block 3, you can erase the wrongly dialed subscriber number and enter it again. After dialing the subscriber’s number on block 3, the call button is pressed, as a result of which a reset signal is sent to the counting input of the corresponding switch 10 or II, and then counting pulses, the number of which is equal to twice the number of the called subscriber, are received. After that, a pair of keys is turned on in the coordinate matrix of the corresponding switch 10 or //, which connect the subscriber to the audio line of the intercom. Then the analyzer 5 determines in what condition is the receiving subscriber unit. In the end of justice, the following modes are activated from the position of the subscriber unit:

1. The subscriber unit is ready to receive a call signal / lies on a stand /,

2. The subscriber’s device is disconnected / due to a break in the subscriber’s wiring /,

3. The subscriber unit does not lie on the stand / after the previous conversation they forgot to put it on the stand /.

When the first mode is turned on, the two-tone call signal sounds in the subscriber unit for about one minute, after which the intercom automatically switches to standby mode. The call signal can also be interrupted by pressing the reset button on unit 3. In case of a subscriber answering / lifting the handset from the stand / during one MANUAN, the signal is interrupted and the path is turned on and the microphone amplifier 13 - amplifier 7 of the loudspeaker 8 is turned on,

and on the display of block b the inscription Su- lights up - say. In this case, the visitor and the subscriber can communicate with one another. The time spent in the intercom in 5th mode is limited to one minute. In this mode, the subscriber can remotely open the electromagnetic lock by pressing the lock button on the subscriber device. A visitor can be forced to disconnect during the minutes allowed for a conversation either by pressing the reset button on the keyboard of unit 3 or the subscriber by placing the handset of the subscriber device with the end call key.

When you switch to the second mode of operation, the intercom gives a short sound signal to the loudspeaker 8, notifying the visitor that the subscriber is disconnected, after which the intercom goes into standby mode,

When you switch to the third mode of operation in t} 4 for two seconds, a call signal sounds in the handset of the subscriber unit, then 5th mode is activated. If after that the subscriber does not answer after one minute, the intercom switches to standby mode.

The intercom allows opening the electromagnetic lock using a common code / for utilities and special services / and an individual code assigned to each subscriber. The general code is dialed directly by pressing the number keys on block 3. The correctness of the code set is confirmed by an audible signal in loudspeaker 8, the display of block b above DECISION EAGLE / open and sending a signal by microprocessor I via line 12 to supply a control voltage to the electromagnetic lock. An individual code is dialed on the keyboard of unit 3 as follows: press the call button, then the subscriber’s noir, again the call button and the four-digit code assigned to the called; - to the subscriber. If an individual code has less than four characters, the code is completed by pressing the call button. When matching the dialed code, pre-7

Claims (3)

1. An intercom for intercoms containing a memory unit, a line status analyzer whose output is connected to the input of the memory unit, a call amplifier, the input of which is connected to the output of the memory unit, characterized in that the microprocessor loaded with a special program is used as a memory unit Integrated operational amplifiers with a stable reference voltage were used as the line state analyzer, and a transistor connected in an open collector circuit was used in the output stage of the call amplifier Oromo "and current limiter in the emitter circuit.  2. The device according to claim 1, characterized in that the subscribers are connected to the intercom according to the coordinate scheme.  3. The device according to claim 1 or 2, characterized in that it is additionally equipped with a photo reader, the output of which is connected to the input of the microprocessor.