DE1949133C

DE1949133C - Evaluation circuit for the alarm feedback and dial blocking for night transmission systems

Info

Publication number: DE1949133C
Application number: DE19691949133
Authority: DE
Inventors: Erwin 8000 München Schumm
Original assignee: Siemens AG
Current assignee: Siemens AG
Filing date: 1969-09-29
Publication date: 1973-05-30

Description

lieh, da für einen Pegelausfall in einer Richtung in der Gegenrichtung nur eine Frequenzumtastung erfolgt, die die Pilotüberwachung auf der anderen Seite nicht bewertet.borrowed, as for a level drop in one direction in the In the opposite direction, only a frequency shift takes place, which the pilot monitoring on the other side does not rated.

F i g. 2 zeigt den Pilotempfänger E mit dem Empfangstilter, dem Begrenzerverstärker, dem Diskriminator und der Auswerteschaltung für die Impulswahl am Ausgang FI und die Miltemfrequenz am Ausgang E1. Außerdem ist parallel dazu am Empfangstilter ein Verstärker und die Pegelüberwachung E 3 angescnlossen. Der Verstärker liefert zusätzlich den Pegel für die Amplitudenregelung des TF-Gerätes an/: 4.F i g. 2 shows the pilot receiver E with the reception filter, the limiter amplifier, the discriminator and the evaluation circuit for the pulse selection at the output F I and the Miltem frequency at the output E1. In addition, an amplifier and level monitoring E 3 are connected to the reception filter in parallel. The amplifier also supplies the level for the amplitude control of the TF device to /: 4.

F i g. 3 zeigt ein Ausführungsbeispiel der Auswerteschaltung. Darin gehören die Transistoren Tl, Tl mit den Widerständen R 1, Rl, R3 zu einer Kippstufe, die von der am Diskriminator entsprechend den (Zmpfangsf requcnzen / 1, /2 abgegebenen Spannung gesteuert wird. Von der Kippstufe wird das Empfangsrelais EI für die Impulswahl betLigt. Umgekehrt parallel zum Eingang der Transistoren T 1, Tl liegen jeweils die Transistoren 7'3, T 4, welche gemeinsam über 7'5 das Relais £11 für die Mittenfrequcn?auswertung steuern. Für die Zusatzschaltung zum Auswerten der Millenfrequenz werden nur drei Transistoren und ein Relais benötigt.F i g. 3 shows an embodiment of the evaluation circuit. The transistors Tl, Tl with the resistors R 1, Rl, R 3 belong to a trigger stage, which is controlled by the voltage output at the discriminator according to the (Zmpfangsf requcnzen / 1, / 2. The trigger stage is the receiving relay EI for the Conversely, parallel to the input of the transistors T 1, Tl are the transistors 7'3, T 4, which jointly control the relay 11 for the center frequency evaluation via 7'5 three transistors and a relay are required.

Die Schaltung arbeitet folgendermaßen: Wird die Frequenz/1 empfangen, Hefen der Diskriminator eine positive Spannung. Die Transistoren T 1 und TA sind durchlässig gesteuert, die Transistoren Tl, T3, /'5 sind gesperrt, die Relais £ I und EII abgefallen. Wird die Frequenz/2 empfangen, so ist die Diskriminatorspannung negativ. Damit sind die Transistoren T 2, Γ 3 durchlässig, die übrigen gesperrt, das Relais EI ist angezogen und das Relais E Il bleibt abgefallen. Wird die Mittenfrequenz / m empfangen, so ist die Diskriminatorspannung 0, die Kippstufe bleibt im Zustand wie kurz zuvor, die Transistoren T 3, T 4 sind dagegen gesperrt, der Transistor T 5 wird über den Widerstand R 4 durchlässig gesteuert und bringt das Relais EIl. Bei Pegelausfall gibt der Diskriminator ebenfalls die Spannung 0 ab, wodurch ebenfalls das Relais EII au^eht. Das Relais E Il reagiert also auf Empfang der Mittenfrequenz und auf Pegelausfall in gleicher Weise. Nur die Empfindlichkeit gegen Störspannungen ist unterschiedlich. Bei Empfang der Mittenfrequenz ist sie so gering wie bei normaler Übertragung.The circuit works as follows: If the frequency / 1 is received, the discriminator yeasts a positive voltage. The transistors T 1 and TA are controlled to be permeable, the transistors Tl, T 3, / '5 are blocked, the relays £ I and EII de-energized. If the frequency / 2 is received, the discriminator voltage is negative. So that the transistors T 2, Γ 3 are permeable, the others blocked, the relay EI is picked up and the relay E Il remains de-energized. If the center frequency / m is received, the discriminator voltage is 0, the flip-flop remains in the same state as it was shortly before, but the transistors T 3, T 4 are blocked, the transistor T 5 is controlled to be permeable via the resistor R 4 and brings the relay EIl . If the level fails, the discriminator also outputs voltage 0, which also causes relay EII to switch off. The relay E II reacts in the same way to reception of the center frequency and to loss of level. Only the sensitivity to interference voltages is different. When receiving the center frequency, it is as low as with normal transmission.

Hierzu 1 Blatt Zeichnungen1 sheet of drawings

Claims

1 21 2

nalor an alternating, fluctuating from plus to minus

_, kende output voltage supplies that alternate

Claim: _{bcjdc Rc | ai} ; brings _{about claims and falling away,}

whereby the controller of the downstream turbine is open

Auswerteschaliung for the alarm feedback 5 bar is provided with such inertia that the

and dial blocking in the event of message transmission, brief response and release of the relay

systems for the evaluation of frequency- has no effect on him.

Shift keying generated via a discriminator. The known arrangement consists of a

incoming three signals with positive or push-pull connection with electron tubes, in their

negative voltage or zero voltage, io anode circuit the relay windings are switched on,

characterized in that a first such a circuit is, however, for the alarm return

Pair of transistors whose transistors (TI ₁ Tl) report and dial-up storage for carrier frequency systems

not suitable with two electrodes of the same type (emitter).

are connected to one another, forms a flip-flop, the object of the present invention is to create an evaluation circuit in its output circuit, the winding of a relay 15, which is located particularly (/·.'/) and whose input uses a series circuit suitable for alarm feedback and dial lock from another pair of transistors in parallel with carrier frequency systems,
is switched, J: SEN both transistors (T3, T4) of the invention measures the evaluation circuit for the alarm response with respect to the transistors (T 1, Tl) of and choice of blocking at Nachriehienübertragungssysteersten transistor pair opposite electron 20 according adapted trodes (collectors ) are connected to each other so that a first transistor pair, the transistors and the third one of which is a pair of electrodes (bases) with two electrodes of the same type (emitters) are connected to one another at the connection point of the two electrodes, forms a flip-flop in whose (emitter) the first TranäisHirpaarcs (TI, Tl) Output circuit * the winding of a relay is and is connected that the connection point of the 25 whose input is a series circuit of a white output electrode (collector) of the tercn transistor pair is connected in parallel, the second transistor pair (T3, T4) with the input both transistors with the opposite of the transistor electrode (base) it is connected to further transistors ren of the first transistor pair opposite (T5) , in the output circuit of which the electrodes (collectors) are connected to one another winding of a further Re! Js (/; "//) is that 30 and its third pair of electrodes (bases) with which the remaining dilttc electrode (emitter) connection point of the two electrodes (emitter) of this transistor (T 5) with the ^ .n connection of the first pair of transistors is connected that the point of the transistors of the two transistor junction of the two output electrode pairs is connected and that an ohmic resistor (collectors) of the second transistor pair with the stand (R 4) between the input electrode of this 35 input electrode (base) one further transistor transistor (TS) and one end of the winding is connected, in whose output _D skreis the winding development of the further relay (Eil) is arranged, that another relay is, that the remaining one furthermore the two relays each have a rest - and third electrode (emitter) of this transistor with the one working contact (Fig. 3). Connection point of the electrodes of the transistors

40 of the two transistor pairs is connected and that an ohmic resistor between the input electrode of this transistor and one end of the

Winding of the further relay is arranged that

furthermore, the two relays each have a resting and a working consonant.

These measures give you an

The invention relates to an evaluation circuit for evaluation circuit that it designed, three criteria, the

the alarm feedback and dialing verification in the event of a subsequent discriminator

directional transmission systems for the evaluation of fert are to be evaluated.

generated by frequency shift keying, via a dis- ₅₀ Based on the exemplary embodiment after the criminator arriving three signals with positive F i g. 1 to 3 the invention is explained in more detail.
or negative voltage or zero voltage. F i g. 1 shows the interconnection of the equipment used in communication technology for alarm feedback via a carrier frequency, often for evaluating certain transmission systems for high-voltage lines (TFH). In the event of failure states and for subsequent alarming according to the pilot tone received in station A , speaking circuit arrangements are required. Be in the receiver E the level monitoring E 3 the Sen known arrangements are generally only the 5 over S1 to the center frequency. The medium is able to evaluate two criteria. frequency is in the receiver E of the opposite station B. A circuit of this type is, for example , rated in the USA.- at El in the same way as the level loss is described in E1 patent specification 2 871463. There, 60 in the receiver of A. In the opposite direction, it means a positive output voltage at the disk, the arrangement works accordingly. In the event of a level failure minator pulling on one relay and a negative one in both transmission directions, El and E3 voltage at the discriminator pulling on are actuated on both stations. So there is El in all other relays. A third criterion, which sends a signal to the criminator in the form of a modulated voltage to switch the blocking or the backup connection, can only be provided in cooperation with the. The blocking is lifted immediately, the controller downstream of the evaluation circuit is a controller if the pilot transmission is used in both directions as-Tu.binc, because the discriminator works. Self-blocking is not mri-