RU18007U1 - LINEAR KIT ASSEMBLY - Google Patents

Abstract

Linear assembly node comprising linear assemblies, two-wire linear inputs / outputs, two-wire station inputs / outputs, a switch, information inputs, an information output, a control bus, a power bus, a connecting device, characterized in that it comprises a selective circuit connected by an input to the output transmission element, and the output is the output of the ULK, the inputs and outputs of the linear sets are connected to the corresponding two-wire linear inputs and outputs and two-wire station inputs and outputs, to the inputs the information outputs of the respective linear sets and the control bus are connected, the output of the switch is connected to the input of the transmission element, the power bus connected to the linear sets, the switch, the transmission element and the selective circuit.

Description

The inventive utility model relates to a fire-alarm sipnalization technique with the transmission of alarm notifications from protected objects via busy subscriber telephone lines to the linear inputs and outputs of a repeater, which is an intermediate component of an alarm notification transmission system (SPI) installed in a telephone exchange. The PBX line inputs and outputs are connected to the corresponding station inputs - the relay outputs, namely to the linear kits node (ULK), which frequency-division and combines the information channels of the SPI and telephone signals at the inputs and outputs of the repeater and compresses the information signals of the SPI in the repeater.

Known node linear sets ULK 1, containing in one housing ten identical boards linear sets (LC), United by common power buses. Each LC has its own two-wire linear input-output, its own LC oscillatory circuit tuned in resonance to the carrier frequency of the information signal of the SPI (18 kHz), and its output stage in the form of a transistor switch. The disadvantages of ULK 1 are its lack of functionality, because it does not provide compression of information signals at its output, the high complexity of the design and the complexity of the settings, due to a completely parallel structure with separate resonant LC circuits for each signaling direction.

Also known is ULK 2, which is the input node of the repeater, containing fifteen LCs, three in each of the five nodes of the UV repeater filters, and a switch with fifteen information inputs and one information output installed in the receiver node (UPR) of the relay. The address inputs of the switch are the address inputs of the ULK. This device has insufficient functionality, because It has a high design complexity and the complexity of the settings, due to the presence in each LC custom LC - circuit.

The closest in technical essence to the claimed device is a ULF containing fifteen LK, each of which contains a two-wire linear input-output, two-wire station input-output connected to the linear input-output of the LC through LC - low-pass filter; the first transformer, the primary winding of which through the first capacitor is connected to the linear input-output LK, the second capacitor connected in parallel with the secondary winding of the first transformer and forming a resonant circuit with it, tuned to the resonant frequency of 18 kHz using the tuning core of the first LC transformer, switch with fifteen information inputs connected to the second capacitors of the corresponding LCs, and one information output, consisting of two sections, each of which is made in de microcircuit of a multiplexer having eight information inputs, one information output, three address inputs, a prohibition input, which sets the information output to a state of high output impedance (“open output”). The address inputs of both multiplexers are connected bitwise in parallel and form an address bus ULK, the inputs of the prohibition of multiplexers

form a common bus ban ULK, the information outputs of both multiplexers are interconnected and form the information output of the ULK. The polling order by the LC switch is determined by the external control unit located in the repeater into which the ULK is inserted, the first transformers of all LCs are equipped with metal noise shields.

ULK 3 has advanced functionality compared to ULK 2, because provides the ability to expand the information capacity of the repeater by installing several (up to eight) ULFs in it. In the frame of the repeater, the information outputs are connected to each other and form the common information output of all installed ULCs. However, the ULK 3 is structurally complicated due to the presence of fifteen customizable and shielded transformers in it and is laborious to set up, because all fifteen first LC transformers must be tuned in resonance together with the second LC capacitors to a frequency of 18 kHz, and it is insufficiently resistant to crosstalk between channels, because It has a high sensitivity to pickup signals with a frequency of 18 kHz from other channels, including and disconnected with the help of multiplexers from the information output of the ULK.

The purpose of creating the claimed utility model is to simplify the design and tuning technology, as well as increase the noise immunity of the node of linear repeater kits.

The drawing shows a functional diagram of the node linear sets ULK.

ULK contains the following elements:

m () pcs. linear sets (LK) 1i -5-1m, each of which has a two-wire linear input-output 2, two-wire station input-output 3, output 4, power bus 5, switch 6 with m information inputs 7i - 7m and switch output 8, control bus 9, transmission element 10 with output 11, selective circuit 12, output ULK 13.

ULK works as follows.

Each LC 1i - 1t is made in any known manner so that the LC transmits telephone signals from a two-wire linear input-output 2 to a two-wire station input-output 3 and in the opposite direction with slight attenuation for telephone communication, but significantly attenuates telephone signals arising at the inputs - outputs 2 and 3, at information output 4. In addition, the LC provides galvanic separation between the information output and two-wire linear and station inputs - outputs, and limits the amplitude of the pulses to info output at a level safe for the information inputs of the switch 6.

In the presence of an information signal of an SPI with a carrier frequency of 18 kHz on a two-wire linear input-output 2 of any LC, this signal is transmitted to the output 4 of this LC in the form of an alternating voltage of the same frequency and is supplied to the corresponding information input 7 of the switch. Via the control bus 9 connected to the switch 6, the information input 7i 7t of the switch is selected or the switch is turned off by bringing its output to the high output impedance state (“output breakage”).

From the output 8 of the switch, the signal received by it enters the transmission element 10, which may include auxiliary circuits for amplifying this signal and / or changing the ULC transmission coefficient. A selective circuit 12 is connected to the output 11 of the transmission element, comprising a capacitor and an inductor connected in series. The alternating component of the voltage at the output 11 of the transmission element 10 excites an alternating current in series with the inductance coil and the capacitor of the selective circuit 12, which generates an alternating voltage at the output of the ULC 13, which is transmitted through the connecting device (not indicated on the functional diagram) to repeater to the SPI repeater.

The indicated oscillatory circuit of the ULK, using the tuning core of the inductor, is tuned to a resonance at a frequency of 18 kHz, i.e. to the nominal carrier frequency of the information signals of the SPI. As a result, the coefficient of transmission of alternating voltage from the linear input-output 2 of the ULK to its output with a fixed active load resistance has a maximum at a frequency of 18 kHz for any alternating direction of signaling of the ULK (with a number from 1 to t).

Power and the necessary voltage levels to all the ULK units are supplied via the power bus 5.

Through the connecting device, the output of the ULK 13, the control bus 9 and the power bus 5 are connected to the repeater. Management of the switch and power board ULK is carried out by the relay.

The number of LCs in each ULK and the number of ULK in the repeater are selected depending on the information capacity of the SPI.

The inventive ULK has several advantages over the known analogues.

The ULK is resistant to crosstalk between its input information channels, since LCs, when the switching directions of switch 6 are turned off for the corresponding LCs, do not form oscillatory circuits with resonant frequencies close to the nominal carrier frequency of SPI information signals. To achieve noise immunity of the ULK to possible crosstalk in practice, none of the transformers used (as part of the LC) and the inductor (as part of the selective circuit) do not need to use metal electromagnetic screens in them, in contrast to the well-known analogues of the ULK, which simplifies the design of the claimed ULK in comparison with known analogues.

ULK is structurally simple, since it contains (2m + 1) transformers and inductors, of which only the inductor has a tuning ferrite core. And the tuning of the ULF consists in adjusting the selective circuit 12, while in known analogues, tuning of m resonant transformers is required.

Claims (1)

Linear assembly node comprising linear assemblies, two-wire linear inputs / outputs, two-wire station inputs / outputs, a switch, information inputs, an information output, a control bus, a power bus, a connecting device, characterized in that it comprises a selective circuit connected by an input to the output transmission element, and the output is the output of the ULK, the inputs and outputs of the linear sets are connected to the corresponding two-wire linear inputs and outputs and two-wire station inputs and outputs, to the inputs the information outputs of the respective linear sets and the control bus are connected, the output of the switch is connected to the input of the transmission element, the power bus connected to the linear sets, the switch, the transmission element and the selective circuit.