DE2337071C3 - Circuit arrangement in a coding device for checking the simultaneous presence of "n" conditions - Google Patents

Description

As an example, FIG. 2 shows an equivalent circuit diagram in FIG

The invention relates to a circuit arrangement in the form of a voltage divider, which results from the switching of a coding device for checking the processing arrangement in the event that "m" as the equalizing presence of "n" potential number of possible conditions is "5" and states a number of "m" possible that "η" is the correct number of simultaneously on-potential states, in which the existence or occurring conditions is "2".
Absence of a potential due to "n" The mode of operation of the circuit arrangement

lust states from “m” possible potential states according to the subject matter of the invention should first be based on given condition is displayed and between 40 the Fig. 1 will be explained. If you put it, for example Each potential point and a common two-out-of-five code of the co-measuring point to be checked are given If a series circuit is based on a diode and a diaphragm, then this means that each of a resistor is arranged. with error-free behavior of the coding device

A circuit arrangement is already known for a voltage U at two (»n«) potential points of the five coding devices for checking the preceding (»" »«) potential points α to e in the presence of »/ 1« conditions (DT-OS For example, -50 volts is applied, while at the 14 74 498). The other (three) potential points to be checked are the voltage zero, a comparator circuit in parallel or a positive voltage can be applied now assume that the "n" conditions are permanently entered for the potential presence of 50 points α and b, the voltage of -50 volts is applied and with the output of the overall circuit arrangement.

The voltage between these two potential-

Coding device also have the same (»« «) points and the measuring point MP is U ₁ and the conditions are present. This circuit has voltage present at the evaluation or meter K anjedoch the disadvantage that is different advertising 55, U _r is by applying the voltage of ten of "n" different comparator -50VoIt to the potential points α and the b must be used, and diodes D1 and D 2 are therefore permeable, while the diode check does not always check the "n" value, but D3, DA and DS remain blocked,
that only a yes-no statement. Due to the inventive arrangement of

The invention now sets itself the task of forming a 60 individual resistors on the two circuit arrangements for a coding device for connecting the evaluation or measuring instrument K, checking for the simultaneous presence of one of "n" conditions for two with a negative voltage "M" possible conditions potential points characteristic voltage U _t from. At a negative voltage of -50 volts at the processing arrangement or without changing these 65 potential points α and b , this voltage U ₂ circuit arrangement will be used to a value of -25 volts , whereby for checking a different number of resistors Al to RS a resistance value of simultaneously existing conditions, eg »nl«, 18 ohms and for the resistors R6 to RIO one

3 '4

Resistance value of 10 ohms is assumed. This would stand Al and Rl, which have a total resistance

can be represented in a simple way with the help of a substitute of 9 ohms. The resistance RU exists

Circuit diagram according to FIG. 2 (voltage divider) calculated from the parallel connection of 3 series connections,

nen. each series circuit having a resistance of

The two potential points α and b can be - 5 i0 ohms and a resistance of 18 ohms, so

since they have the same potential - as a potential - represents a resistance of 28 ohms. This

consider tial point alb . Between this potential resistance network consists of the resistors R 3,

Punkta / 6 and earth potential are two wide levels R4, RS, R8, R9 and AlO and represent a total

Rl and All in series (dashed circles), the resistance value of which is 18.33 ohms. Since the span

The central point is the measuring point MP . The reflection U = - 50 volts results for the

stand R I consists of the parallel-dialed resistance voltage U ₂ according to the formula

Rl 9

U. = U - = -50 —L— a value of -25 volts.

Rl + RU 18.33

The construction still remaining in the overall resistance network, which depends on the number of with

The held resistors R6 and J? 7 are potential points occupied in the characterizing potential

Block diagram only drawn in dashed lines, since it emits a clearly defined measuring voltage and where

lie parallel to the voltage part and therefore this voltage differs from another at the measuring point

present case no influence on the span- possibly present stress, which due to

have value U ₂ . an error occurred in the coding ratio

For example, only one potential would be clearly distinguished. Furthermore, Hie

point, e.g. B. the potential point a, a voltage »s circuit arrangement has the advantage that without the

of - 50 volts are applied, then this results in a similar way to the slightest intervention in the same immediately for the

previously described using the above formula, checking a different coding ratio,

a voltage value of U ₂ = -14VoIt. Is due to e.g. the ratio 5 to 3 or 4 to 1, to be used

3 potential points the voltage of -50VoIt that is. It would then only be a different one (e.g. a voltage of 30 - 35 volts or - 14 Volts results in the same way as the desired value and as a value of IZ ₂ = - 35 volts. Would continue to correspond to a code ratio that can be recognized without errors -

4 potential points, the voltage of the corresponding measuring voltage U _{2 is present} at the measuring instrument K from -5OVoIt, then the result is a corresponding reading or evaluation, whereby all occurring voltage values of U, = approx. - 42VoIt. measuring voltages in a clear and extensive

The subject of the invention thus provides a scarf 35 evenly spaced from one another, arrangement in an extremely simple and economical

1 sheet of drawings

Claims (1)

"Η 2" can be used, whereby the scarf claim: downstream evaluation or Measuring device K can in principle show immediately how- Schaltangsanordnung in a coding many conditions of the "m" .möglichen conditions for checking d £> simultaneous Vorhanden- s vorliegen- addition, the circuit arrangement is his from "n" potential states of a presence in an extremely simple and economical We payout ₁ Se »m «Possible potential states to be guided by. ... . the existence or non-existence This is achieved according to the invention by one through> n «potential states from> m < Possibly the given condition between a respective common potential state is displayed being and being between each potential-speaking resistance and a common tialpunkt and a common measuring point a ground potential per em further resistor arranged Series connection of one diode and one each and that the first-mentioned resistors are a first Resistance is arranged, thereby ge size and the other resistors a second indicates that between a respective 15 size. gen common connection point (Eq to G 5) The invention is based on two figures between each one diode (Dl to D 5) and the explained corresponding resistance (A1 to AS) and FIG. 1 shows the circuit arrangement with the a common ground potential (E) a further potential points α to e, at which a voltage U terer resistance (R 6 to KlO) is arranged 20 (e.g. -50VoIt) can be applied, with which the potential and that the first mentioned resistances ( R 1 to tialpunkte downstream diodes D 1 to D 5, RS) a first size and the other resistors with the equivalent, between the common levels (R6 to RIO) a second size - measuring point MP and the diodes Dl to D5, kitted resistors Al to RS, with the between 25 the common ground potential E and the respective connection point Gl to GS of the diodes Dl to DS connected equivalent resistors R 6 to R 10 and with an evaluation or measuring instrument K, which is connected between earth potential E and measuring point 30 MP for evaluating the measuring voltage U ₂ .