DD223899A3 - CIRCUIT ARRANGEMENT FOR THE DISTINCTION AND STORAGE OF MARKINGS - Google Patents

Abstract

The invention relates to a circuit arrangement for distinguishing and storing characteristics of different polarity and different internal resistance, preferably of authorization characteristics in the switching technology. The aim of the invention is to find a solution by means of simple, little labor-time and material consuming black and white relays with only one winding with increased reliability. It is an object of the invention to distinguish at any one time over a connecting line to be transmitted up to 9 different characteristics and store, with no auxiliary, comparison and threshold voltages are to be used. There are no additional switching elements to use for switching between different detection circuits. The essence of the invention is that the characteristics of negative polarity via voltage dividing resistors (R1, 2) directly to the base of the first switching transistor (T1) and on the other hand, in addition to the other voltage dividing resistors (R3-4) via a Zener diode (D3) the base of the switching transistor (T2) is connected for evaluation, and that the positive polarity markings are similar to the emitters of the switching transistors (T3; 4) constructed in basic circuit. Fig. 1

Description

For this 3 pages drawings

Field of application of the invention

The invention relates to a circuit arrangement for distinguishing and storing characteristics of different polarity with different internal resistance, preferably of authorization identifier in group connector receiver sets of the switching technology.

These authorization identifiers are available as voltage characteristics of negative and / or positive polarity against ground potential with an internal resistance of negligible magnitude (= 0 ohms) and finite size (a few K ohms). Here, the license plate are often generated by discharging a capacitor.

Characteristic of the known technical solutions

In conventional relay-based switching technology, it is customary to use flat relays 48 for recording and evaluating the ^: authorization identifier.

To evaluate the states "negligible internal resistance" (Ri = * Ό ohms) or "finite internal resistance" (Ri some KOhms), these relays must comply with fault current conditions and possibly also have several windings. Another winding is required for the storage of the recorded mark by holding the relay over the period of time • the concern of the plate anyway.

The disadvantage is that the relays used in the production of labor and räterialaufwendig. The required Mehrwicklungsaüsführungen and the necessary compliance with fault current and holding conditions lead to an additional workload of qualified professionals in the adjustment and testing

 In addition, circuits with fault current conditions always represent compromise solutions.

  Object of the invention^;'.. · ..'.'. '. '': '' ^: - ''. ''''    '. , "''." "^: ': '

The aim of the invention is <to find a circuit arrangement for distinguishing and storing characteristics of different polarity with different internal resistance by means of simple, less labor-time and material consuming black and white relays with only one winding with increased reliability.

Explanation of the essence of the invention

The object of the invention is to provide a circuit arrangement which is independent of the succession of certain switching states of the switching system in a position to distinguish at any one time to be transmitted via a connecting line'biszu 9 different characteristics and store. In this case, no additional Schaitgiieder to be used for switching between different detection circuits. Except for the available operating voltage ^ end potential; 60V - are no auxiliary, comparison and threshold voltages ztrverwenderi 'require additional circuitry.

According to the invention, the characteristics of negative polarity are connected once via a base voltage divider directly to the base of the first switching transistor and, secondly, in addition to the further voltage divider resistors via a zener diode to the base of a further switching transistor for evaluation. .

The positive polarity markings are once passed through voltage dividing resistors to the emitter of the first switching transistor constructed in basic circuit and, in addition to the other voltage dividing resistors and a zener diode, to the emitter of the second switching transistor constructed in basic circuit. At the taps of connected in the collector circuits of the switching transistors Spannungssteiierwiderstände Pegeitransistoren are turned on. The essence of the invention consists in that the identifiers, which are separated by diodes, of positive or negative polarity, are connected directly to the switching transistors via voltage divider resistors and to the switching transistors via zener diodes. In the case of markings with an internal resistance Ri some KOhm, the switching transistors with upstream Zener diode do not respond, but with an internal resistance Ri = 0 ohm all switching transistors can respond. Due to the only available negative operating voltage potential, these switching transistors are built in basic circuit with incoming characteristics of positive polarity. ,

By this simple solution of the distinction of the different internal resistances of the transmitting source 8 characteristics and isolation can be clearly transmitted and evaluated.

embodiment

The invention will be explained in more detail by exemplary embodiments. In the accompanying drawings show: Flg. 1: Circuit arrangement for fully electronic differentiation and storage of license plates different

Internal resistance.

Fig.2: Circuit arrangement acc. Fig. 1 with black and white switching relay for storage. 3: circuit arrangement acc. Fig.2 when transmitting a smaller number of license plate '

-3- 247 014 2

In the solution according to the invention are used to detect and evaluate the voltage applied to a wire indicator, z. B. authorization flag having a different internal resistance (negligible magnitude Ri = O ohm, finite order Ri some KOhm) and a different polarity (± 60V), separated from the diodes D1, 2 in their polarity.

The negative polarity indicator applied via the input E reaches the base of the first switching transistor T1 via the diode D1 once, and directly to the base of the first switching transistor T1 on the other hand in addition to the further base voltage dividing resistors R3, 4 and via a Zener diode D3 to the base of the one Base-emitter resistor R17 having switching transistor T2.

In this case, the base voltage divider resistors R1, 2 are dimensioned to such an extent that, when a characteristic with a finite internal resistance Rl is applied, a few KOhms of the first switching transistor TI are safely turned on and the switching transistor T2 is reliably blocked. The base voltage divider resistors R3, 4 are also dimensioned in conjunction with the zener diode D3 so that when evaluating a flag with a negligible internal resistance Ri = O Ohm both switching transistors T1, 2 are safely controlled through. Depending on the internal resistance Ri of the transmitted identifiers, the corresponding binary signals are available at the associated collector resistors R13, 14 of the switching transistors T1, 2, which are stored by activated binary memories A1, 2 and are ready for evaluation. When indicators of positive polarity are applied, they are applied via diode D2 to voltage source resistor R5; 6 directly to the emitter of a switching transistor T3 constructed in basic circuit and to additional voltage dividing resistors R9; 10 and to the emitter of one emitter via a zener diode D4. Base resistor having and constructed in basic circuit switching transistor T4. By similar dimensioning of the voltage divider resistors R5; 6 and R9; 10 including the Zener diode D4, a few internal resistors Ri only switch some of the switching transistor T3 and with a negligible internal resistance Ri = O ohm both switching transistors T3; To obtain unique binary signals, it is necessary to connect the switching transistors T3, 4 to the npn level transistors T5, 6. The collector resistors R8; 12 of the transistors T3; 4dienen in connection with the base-emitter resistors R7; 11 of the drive of the following npn-level transistors T5; 6, wherein at the associated Kollektorwiderständeri R15; 16 are the corresponding binary signals available through activated binary memory A3; are also storable.

Since two license plates of different polarity can be transferred in chronological order, the options listed in the following table for the evaluation and storage of the transmitted license plates result.

transmission side Reflected inside Pulse diagram i Receiving page Collector potential T2 VT5 T6 Send potential was standing dyrch-controlled Ti L, 0. 0 Kohm ' I Tran sistors 0. O O 0 ohms Ti O  *; L 0 V Kohm L_J Ti; 2 L L I » L ^{+ U} B Zs 0 ohms ,, T5 L L L 0 ^{+ t3} B Kohm; Kohm T ₅ ; 6 0 L L L -Ü _B AU _B Kohm; r-ι O Q L O -TS / + U «0 ohms T1; 5; 6 O O L I B B JS's Oohm; Kohm; 0 L O 0 -V ^ B " ta Oohm; it is 0 ohms Ti; 2; 5; 6 Il -u _B / ₊ u _B , ' Isolation

-4- 247 014 2

In a further embodiment (Figure 2) are instead of the collector resistors R13 ... 16 simple SchwaTz white Schaltr.elais TA ... 4A

used, the switch over working contacts 1a ... 4a self-holding. _;

To switch off these switching relays TA ... 4A after the evaluation these holding circuits are a common

Shutdown transistor T7 supplied.

FIG. 3 shows a special embodiment of a variation which corresponds in principle to the representations according to FIGS. 1 and 2 and in which only the three identifiers -Ub via Ri = O ohms, -U _B via Ri some KOhm and + U ₈ are to be evaluated via Ri = O ohms. Here, the collector d ^ it switching transistor T3 is guided to that of the turn-off transistor T2.

After responding to the storage relay 2A, the emitter of the Schaittransistors T3 is placed over another working contact 2a Erdpotentiai X and thus securely locked. ,

Claims (2)

-2-247 014 Invention claims: '....' 1, circuit arrangement for distinguishing and storing characteristics of different polarity with different internal resistance, preferably of authorization marks in the switching technology, in which ^ diodes are provided for polarity separation, characterized in that the negative polarity indicator once via voltage distribution resistors (R1, 2) directly to the base of the first switching transistor (T1) and secondly in addition to the further voltage divider resistors (R3; 4) and via a zener diode (D3) to the base of the switching transistor (T2) are peeled for evaluation and that the characteristic positive polarity once, via voltage divider resistors (R5, 6) to the emitter of the base circuit constructed Schalttrahsistors (T3) and on the other in addition to the. Voltage divider resistors (R9; 10) and via, a Zener diode (D4) to the emitter of the base circuit constructed switching transistor (T4) are guided. 2. Circuit arrangement according to item 1, characterized in that connected to the taps of the voltage in the collector circuits of the switching transistors (T3; 4) Spannungssteilerwiderstähden (R7; 8 / R11; 12), level transistors (T5, 6)