DE1242708B - Telecontrol system for central monitoring and fault location in carrier frequency wide area systems - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY GERMAN WWW PATENT OFFICE Int. Cl .:

H03f

EDITORIAL

H04m; H04b; G01 r
German class: 21 a2-41 / 07

Number: 1242 708

File number: T 28634 VIII a / 21 a2

Filing date: May 21, 1965

Open date: June 22, 1967

The main patent 1 218 531 relates to a remote control system for central monitoring and fault location in long-distance carrier frequency systems with many, especially above-ground, main offices and from these remote-fed, in particular underground repeaters, from a control center the operational status of the transmission system is monitored and an error either in a main office or a section between two main offices and also the type of error is determined by the control center via the carrier-frequency transmission in the outgoing direction Serving line pair or individual remote monitoring impulses one after the other via an additional double line which are received in every main office and there one in itself Actuate the known, irreversible, η-level binary receive counter that is set after receiving the corresponding remote monitoring pulses stimulates setting transistors, which send back a with the help of the receive counter binary coded feedback signal via the carrier-frequency transmission in Arrange a pair of lines serving the incoming direction or an additional double line to the control center, where it is determined which office has no feedback signal or a specially marked one when it is activated Has returned the feedback signal.

There is a feedback signal receiver in the control center that decodes the coded feedback signal and determines which body has reported back. The first pulse of the feedback signal is a so-called Preparation pulse that prepares the reception of the feedback signal.

After the main office, a preparatory pulse received stimulates a monovibrator, the pulse duration of which is slightly longer than the duration of a feedback signal. A binary auxiliary counter with ρ = ld (1 + «) - rounded up to an integer value - steps and η + 1 positions controls a decoding matrix made up of η + 1 impulse gates. The auxiliary counter is switched on by a clock, which in turn is released by the monovibrator after receiving a preparation pulse. The auxiliary counter unlocks the η 4- 1 impulse gates of the decoding matrix one after the other in the rhythm of the clock frequency of the clock generator via «4-1 independent bivibrators, which are set according to the feedback signal.

In the rest position, the auxiliary counter has the position η + 1, and the last pulse gate of the decoding matrix is transparent. The last bivibrator is also activated. The preparatory impulse that the reception of the

Telecontrol system for central monitoring
and fault location in long-haul carrier frequency systems

Addendum to the patent: 1218 531

Applicant:
Telefunken

Patentverwertungsgesellschaft mb H.,
Ulm / Danube, Elisabethenstr. 3

Named as inventor:
Dipl.-Ing. Joel Korn, Backnang

Prepared for the feedback signal, brings the last bivibrator into the position required to receive the feedback signal via the only permeable (n + 1-th impulse gate).

This circuit has a disadvantage. The feedback signal must not have more than one preparation pulse and η + 1 feedback pulses, which means that a monovibrator, which is used as a feedback signal transmitter and whose pulse duration determines the number of feedback pulses, must be calibrated. If the feedback signal has more pulses, the η + 1 bivibrators can be set incorrectly and the feedback can be falsified.

This disadvantage is eliminated according to the invention in that a shift register with «4-1 or a binary counter with more than η + 1 positions is used as the auxiliary counter, that in the rest position both the auxiliary counter and the decoding matrix are in position 1 and that both the clock pulses to the auxiliary counter and the feedback pulses to the decoding matrix via a pulse gate controlled by the monovibrator, which can only be unlocked with a delay.

The invention is explained using an exemplary embodiment shown in the drawing. The feedback signal is amplified and rectified by the receiver E , and its pulses are checked for length by the pulse filter / F. A received preparation pulse excites via one consisting of the capacitor C ₁ and the diode D ₁

709 607/392

and via the resistor .R ₁ controlled first impulse gate a monovibrator M to. As soon as the monovibrator M is excited, the first impulse gate is blocked via the resistor R ₁ , so that further feedback pulses can no longer influence the monovibrator M. Via a second pulse gate, which consists of the capacitor C ₂ and the diode D ₂ and which is controlled by the monovibrator M via the resistor R ₂ , the preparation pulse cannot reach the input E ₁ , the decoding matrix DM , because this pulse gate is due to the time constant R. ., C., Is blocked with a delay. All further feedback pulses reach the decoding matrix unhindered.

The excited monovibrator M releases the clock generator TG _{via a holding diode D 4} . Via a third pulse gate, which consists of the capacitor C ^ and the diode D., and which is controlled by the monovibratorM via the resistor R _a , the first pulse of the clock TG cannot reach the input E _{HZ of} the auxiliary counter HZ because this pulse gate is unlocked delayed due to the time constant R ₃ C _3. All further impulses of the clock get unhindered to the auxiliary counter HZ.

Claims (2)

Patent claims: 1. Telecontrol system for central monitoring and fault location in long-distance carrier frequency systems with many, especially above-ground main offices and remote-fed, especially underground repeaters, in which the operating status of the transmission system is monitored from a control center and a fault is either in a main office or in a section between two main offices is localized and the type of error is also determined, with individual remote monitoring pulses being sent out one after the other by the central office, which are received in each main office and there actuate a known, irreversible, η-level binary reception counter which, after receiving the corresponding remote monitoring pulses Stimulates control transistors, which cause the return of a feedback signal, which is binary coded with the help of the reception counter, with a preparation pulse and η + 1 feedback pulses to the control center, where it is determined which office is waiting uern has not returned a feedback signal or a specially marked feedback signal, and the received preparation pulse for the purpose of decoding the feedback signal excites a monovibrator, which releases a clock that activates an auxiliary counter and sets the further feedback pulses via a decoding matrix η + 1 independent of the auxiliary counter overridden decoding matrix η + 1 , according to patent 1218531, characterized in that a shift register with / 2 + 1 or a binary counter with more than η + 1 positions is used as an auxiliary counter, that in the rest position both the auxiliary counter and the decoding matrix are in position 1, and that Both the clock pulses to the auxiliary counter and the feedback pulses to the decoding matrix are each fed via a pulse gate controlled by the monovibrator, which can only be unlocked with a delay. 2. Telecontrol system according to claim 1, characterized in that the bivibrators (B ₀ to B ") and the auxiliary counter (HZ) are held by the monovibrator (M) in the rest position so that the auxiliary counter is in position 1 and the bivibrators are not excited . 1 sheet of drawings 709 607/392 6.67 © Bundesdruckerei Berlin