SU1172033A1 - Device for connecting fixed radio station to supervisory communication line - Google Patents

Abstract

A DEVICE FOR CONNECTING A STATIONARY RADIO STATION TO THE CONTROL LINE OF A COMMUNICATION, containing on a mobile radio station a call signal generator and a transmitter power amplifier, and on a stationary radio station - a signal receiver, the output of which is connected directly to the input of a call signal receiver and through a connection unit to the dispatcher line of communication, also the first time relay, the first output of which is connected to the control inputs of the blocking signal generator and the blocking signal receiver, and the second time relay, input which is connected to the second output of the first time relay, the output of the second time relay and the output of the lockout signal receiver are connected respectively to the first and second control inputs of the connection block, and the output of the blocking signal generator and the signal input of the lockout signal switch are connected to the control room communication line, different By the fact that, in order to increase the accuracy of the connection of the stationary radio station, an attenuator and a control voltage driver are introduced on the mobile radio station, with the first output The signal generator is connected via an attenuator to the input of the transmitter power amplifier, and the second output is connected to the input of the control voltage generator, the output of which is connected to the control input of the attenuator, and the sequentially connected filter and the front unit and the element I , trigger and third time relay, the output is receiving (the signal name is connected to the filter input, the outputs of the call signal receiver, the threshold unit and the trigger are connected to the first, second and three, respectively emu inputs of AND gate whose output is connected to the input of the first timer, the output of the third time switch and the output blocking signal receiver are connected to th first and second inputs of the flip-flop, whose output is connected to the input of the third relay at since.

Description

The invention relates to an automatic control system for train radio communication on rail lines, in particular, to devices for automatically selecting and connecting a fixed simplex radio station to a dispatching communication line when establishing a connection from the mobile radio station.

The aim of the invention is to improve the accuracy of the connection of the stationary radio station.

The drawing shows a structural electrical circuit of a device for connecting a fixed radio station to a dispatching communication line.

The device contains on the mobile radio station a call signal generator 1, an attenuator 2, a transmitter power amplifier 3, a control voltage driver 4, and a stationary radio station has a signal receiver 5, a call signal receiver 6, a filter 7, a connection unit 8, a first time relay 9 , generator 10 of the blocking signal, receiver 11 of the blocking signal, trigger 12, element I 13, second relay 14 — time, threshold unit 15, third time relay 16.

The device works as follows.

When making a call from a mobile radio station, the control voltage generator 4 is started, from which the sawtooth voltage is fed to the control input of the attenuator 2. Under the influence of this voltage, the attenuation of the attenuator 2 and, therefore, the output power of amplifier 3 changes. Thus, when making a call from a mobile radio station, the output power of the transmitter gradually changes from zero to the nominal value. The controllable attenuator 2 can also be included in the automatic power control circuit of the transmitter, if there is one in the mobile radio station.

The output signal is received by the receiver 5 of the stationary radio station, in which case the call signal receiver b is activated. From the receiver 5 output, the interference voltage, inversely proportional to the signal / interference ratio, flows through a filter 7 separating the call signal and interference to the threshold block 15. When the signal at the input of the receiver 5 reaches the stationary radio level, the specified signal / the interference at the receiver output of the stationary radio station, the threshold unit 15 is triggered, and the output signal of the element 13 triggers the first time relay 9.

When receiving from different signal zones, the closer the stationary radio station is to the calling mobile station, the smaller the output power level of the mobile radio transmitter will ensure the specified ratio

the signal / interference at the output of the stationary radio receiver, and therefore, the first time relay 9, which generates a delay pulse, turns on faster. The blocking signal receiver 11 is blocked for the delay time and the blocking signal generator 10 is turned on. A blocking signal sent to the dispatch communication line triggers the receivers of 11 other stationary radio stations that have received a call, which causes the installation of triggers 12

5 of these stationary radio stations are in a state that prevents their And elements from being triggered and that these stationary radio stations are connected to a dispatcher communication line.

The return of the trigger 12 to the initial state occurs after the operation of the third time relay 16. At the moment when the delay pulse generated by the first time relay 9 ends, its falling edge turns on the second time relay 14, which generates the same delay pulse for all stationary radio stations, the falling edge of which is the connection signal for connection unit 8. If in this case the connection unit 8 is not closed by the blocking signal from the receiver 11, then the fixed radio station of the low-frequency path is connected to the dispatching communication line. A constant delay, the same for all devices of choice, is needed to compensate for the on-off and the receiver 11 blocking signal.

 When receiving from equisignal zones, the operation of the threshold unit 15 occurs at the same level of the output power of the transmitter of the mobile radio station. Poety (for the first relay 9 times all stationary

The 0 radio stations located in the equal-signal zone are triggered simultaneously, but the duration of the pulses generated by the first time relay 9 is not the same for different stationary radio stations. Receivers 11 are blocked for the delay time, and the generators 10 of the blocking signal of all stationary radio stations are turned on. In this case, the second time relay 14 and the connection unit 8 operate as described above. At the moment the connection signal is applied to the junction block 8, the latter are closed by the blocking signal, with the exception of the junction block of the stationary radio station with the longest impulse duration, resulting in this radio station with a path

5 LF is connected to a control line.

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Claims (1)

A DEVICE FOR CONNECTING A STATIONARY RADIO STATION TO A DISPATCH LINK containing a call signal generator and transmitter power amplifier on a mobile radio station, and a signal receiver on a stationary radio station, the output of which is connected directly to the input of the call signal receiver and through the connection unit to the dispatch communication line, as well as the first time relay, the first output of which is connected to the control inputs of the blocking signal generator and the receiver of the blocking signal, and the second time relay, the input of which connected to the second output of the first time relay, and the output of the second time relay and the output of the receiver of the blocking signal are connected respectively to the first and second control inputs of the connection unit, and the output of the generator of the blocking signal and the signal input of the receiver of the blocking signal are connected to the control line, characterized in that, in order to improve the accuracy of connecting a stationary radio station, an attenuator and a driver of the control voltage are introduced at the mobile radio station, and the first output of the generator with the call signals through the attenuator are connected to the input of the transmitter power amplifier, and the second output is connected to the input of the control voltage driver, the output of which is connected to the control input of the attenuator, and a filter and a threshold block are connected in series with the q station, as well as the And element, trigger S and a third time relay, wherein the output of the signal receiver is connected to the input of the filter, the outputs of the receiver of call signals, a threshold block, and a trigger are connected respectively to the first, second, and third inputs of the element And that, the output of which is connected to the input of the first timer, the output of the third time switch and the output of the receiver lock signal are respectively connected to first and second inputs of the flip-flop, whose output is connected to the input of the third timer.