DE1763514C - Electrical control device for a controlled variable comprising several components - Google Patents

Description

2. Control device according to claim 1, characterized in that the actual value potentiometer

which the actual value potentiometer is adjusted by a scale. In a known circuit arrangement of this type (deur.che Auslegeschrift 1 220 (07) Heaf the actual value potentiometer as well as a plurality of setpoint potentiometers in parallel on a common Voltage source. The tap of the Ϊ,; - value-potentiometer is connected to the tap of each; kr setpoint potentiometer via a zero detector. The actual value potentiometer thus forms pi ,,! .-

Bridge circuit in the diagonal of which the gate is located. The Nulldj'.ectors are electron- .. Relay, at the output of which a polarizing. ·! Servo relay is. The contacts of the Servo-R;. ·: have two switch positions: In the first Sch; .i!: - · they are located as long as the voltage on the ■ handle of the htwert potentiometer under the Sp.iiir at the tap of the setpoint potentiometer, the setpoint "is therefore not yet reached; in the

for setting a lead, one as a setting table with each of the setpoint potentiometers resistance switched potentiometer (28, 29) "'

is upstream and downstream and that the taps (30. 31) serving potentiometers (28, 29) for complementary Adjustment of the resistors are coupled together.

3. Control device according to claim 2, characterized in that the potentiometer (28, 29) are bridged by contacts (33, 34) controlled by the zero detectors (24, 25, 26...).

4. Regeleini.jiitung according to claim, characterized in 30 switching position, the contacts are when marked that d: m is vert potentiometer voltage at the tap of the target value potentiome:

(10) a plurality of ^D aars coupled pre-potentiometer is less than the voltage at the tap of the Imv, halt potentiometer (28a, 29a, 2b, 29b... ) Pre-potentiometer, if the relevant setpoint value is connected. is exceeded. The good loading device

5. Control device according to claim 4, characterized in that it contains a plurality of motors for the one / -! · characterized in that the potentiometer of each component. The engine of each component \ - Pair through pairs of contacts (33 α, '34 α,. -. _ -

Λ "\ h ^ 4 M iihi» rKrii / -L · * < \ nA Al ~ .. - ..: "ti..ii

, _ .., .. »-, .. ..."»." V J [IiU ₁ UH. VWiI JU UlIItIIl! "» UM-

detector (24. 25, 26. ..) can be controlled.

6. Control device according to claim 1, characterized 40 th components are assigned, in the two; marked, da3 between the tap (18, switching positions connected to voltage (German A. 19) of each setpoint potentiometer (15, 16) and legend 1 22 (1627). In this well-known Ano at one end of the same a lead potentiation that works with a bridge circuit, π meter (35, 36) is switched and that the value is set in front of each setpoint potentiometer halt-zero detector (39, 40) between the tap 45, which is the sum of the previously one

(11) of the actual value potentiometer (10) and the contact of the associated servo relay switch position as well as in a row ¹ u, the contacts of the servo relays, which do the previously do> ^:

set setpoints plus the setpoint of the relevant; .π Component results. The following situation then arises, for example: A first to be weighed Good should with a value of z. B. 20% of the total

handle (37, 38) of each lead potentiometer (35 36) is switched.

7. Control device according to one of claims I to 6, characterized in that 50 materials to be weighed are dosed. The second each setpoint potentiometer (15, 16, 17) a component of the goods should z. B. 30% of the total

Material, etc., until 100 ° / o is reached.

For this purpose, the first setpoint potentiometer is set to 20 ° Ό, but the second to 50 ⁰ O, namely 2O E ß l

j (, 1, 17) a

adjustable balancing resistor (21, 22, 23) is connected in series.

8. Control device according to claim 1, thereby set 20Ό, but the second to 50O, namely characterized in that a first in accordance with 55 2O% plus 30%. So it has to be the case of the actual value adjustable actual value potentiometer component setpoint potentiometer always the (10) a second actual value potentiometer (41) can be set with each value that is the sum of the an upstream and a downstream adjustment preset setpoint and the setpoint resistance (42, 43) is connected in parallel that gives the actual wiper on the potentiometer hurrying (11, 47) the actual value potentiometer (10, 60 should be set. Here, at setting 41) are coupled to one another and that one len of each component from the setting person an addi-zero detector (48 to 53) between the grinding task. It turns out to be in some (11, 47 or 18, 19, 19 ') each of the actual value potential cases is considered disadvantageous.

The invention is based on the object of creating a value potentiometer (15, 16, 16 ') on the other hand, with which multi-component control is activated. the setpoint of each individual component (instead of the sum of the setpoints) can be set directly _{on the setpoint potentiometers.}

3 4

According to the invention, this is done in the case of a control facility

device of the type mentioned achieved thereby. must be taken into account. This can be done in the way

that the actual value potentiometer and each of the target events. that between the tap of each setpoint

value potentiometer on a separate span potentiometer and one end of the same

voltage source is applied and the wiper of each setpoint value 5 lead potentiometer is switched and that each one

Potentiometer with one end of the adjacent lead zero detector between the tap of the actual

th setpoint potentiometer is connected. value potentiometer and the tapping of each lead

In the case of the invention, therefore, it is not: a bridge potentiometer is switched on. Switching to

circuit used with soft actual value and setpoint reduced speed (or some other

p.nentiometer on a common voltage io desired control precedence) can then be

cueiie are applied and the zero detector is triggered in the bridge period lead NuH detector.

daaonaleti He Rather, the ar, the advantageous is the arrangement.

^7: ien PotentK. etern tapped, from each other that with each setpoint potentiometer an adjustable

v. dependent voltages are added and connected in series as the sum of the balancing resistance.

ii,;: - Voltage at the tap of the istweri-Potcmiov egg 15 This balancing resistor allows differences

e ^. counteracted. The various voltage sources must be eliminated for each component,

c ■: ■ separate zero detector provided. The Nui- It is also possible through suitable adjustment of the

L; ectors can, for example, each have a ser \ o relay, equal resistance possible, the resolving power

u -gen, the servo relays in the above and thus the setting accuracy when using

c. The type of German interpretation 1 220 <> 2 "'20 equals the setpoint potentiometer in each case to the

e ■: Meh: number of drive motors for d: · Bringing the most favorable value. For example, if the

r 'B of the individual components steu.-n can. The maximum proportion of a component is 50%,

1 in the setpoint potentiometer, only the S ^ üwcrt is then used to set the balancing resistances

! component concerned. Servants Should it be that the final value of the setpoint potentiometer

• t can only be done by adjusting the potentiometer concerned, ie the rbee stop of the grinder

: meters can be changed without therefore also 50 "0 less than the end value of the actual value potentiometer

: Remaining potentiometer adjusted we ^r is the müSien meters. You can then see the entire setpoint

i.s is often required to mrhon before reaching potentiometer for setting up to 50 ° 0 zi r

^; .s to generate the adjusted setpoint em signal. Grouting, creating a corresponding increase

; .spiclweise, in order to adjust a dosing device to the correct resolution and setting accuracy.

r rj to switch the dosing speed. There must be speed.

a '■ ·> to a certain extent a lead signal can be generated. Some embodiments of the invention are shown in

n.is can be shown in the arrangement according to the invention on the drawings and

Happened in different ways. Described one possibility.

stands in the fact that the actual value potentiometer for input 35 Fig. 1 shows the circuit of a multi-component : - Creation of a lead as a setting resistance control according to the invention; connected potentiometer upstream and downstream FIG. 2 shows a circuit arrangement through is. that the attacks of this potentiometer to the grain which in the circuit according to FIG. 1 a lead in Complementary setting of the resistors can be set with an actual value circuit; are coupled to the other and that the potentiometer 40 F i g. 3 shows a circuit by which in the through contacts controlled by the zero detectors, actual value circle of FIG. 1 a plurality of bridged over There is then ^ an intervention on the hold for the various components setting actual value side. Through the upstream and downstream bar is;

Adjustment resistances are shown with an increased actual value. If this increased actual value exceeds the setpoint 45 component control according to FIG

is reached, for example, the switch to lead can be set in the setpoint circles:

a lower dosing speed takes place. Fig. 5 shows a further modification of the invention

At the same time, however, it takes place via the circuit according to the zero detection.

In the circuit arrangement according to FIG The actual value becomes effective and the dosing device can be adjusted. The wiper of the Tstwerttung for the component in question with the vermin potentiometer is denoted by 11. The actual value of the speed continues to work until the potentiometer is connected to a voltage source UO . 55 In series with the actual value potentiometer 10, the switch to the next component takes place when the setpoint is actually reached. Trimmer potentiometer, meter 12. In front of and behind the actual value potentiometer, the circuit at XY and control arrangement on the actual value potentiometer is separated from UV with a single such switch value potentiometer. These points are important when executing, if for all components with the equation of F i g. 1 can be worked by contact bridging 13 or chen lead. When connected for the 60 14. The multicomponent control of different components also holds a different one, furthermore, a plurality of setpoint potentiometer lead must be set, this can be achieved by metem 15, 16, 17. _ that the actual value potentiometer has a The wiper of the potentiometer 15,16, 17 are designated with a plurality of pairs of coupled lead potentials 18, 19 and 20, respectively. In series with each of the meters is connected upstream and downstream and that the potentiometer 6 _S setpoint potentiometer 15, 16, 17 is a balancingntiometer of each pair di: ch pairs of contacts resistance 21, 22 and 23 respectively. The setpoint potentiometer is bridged , each of which is connected to a zero detector 15 with the balancing resistor 21 controls a voltage source U 1. The setpoint potentiometer

meter 16 with the Abgleicliwiderstand 22 is located on the potentiometer 29 by the connection of mucilages £ iner independent thereof Spannunesquelle Ul to. fer31 is bridged to point ί7, and vice versa the setpoint potentiometer 17 with the adjustment reverses. The two potentiometers 28 and 29 can be bridged by a resistor 23 which is connected to a third voltage source and a contact 33 and 34, which is connected by i / 3. Additional setpoint values can be controlled by the zero detectors 24 ... as required. Potentiometer with additional separate voltage By connecting upstream and downstream resistors

sources are provided. The slider 18 of the nominal value 28 or 29 to the actual value potentiometer 10 value potentiometer 15 is mil the negative end, the potential of the wiper 11 is around a fixed of the setpoint potentiometer 16 connected. The amount moved. Such a circuit has an effect Slider 19 of the setpoint potentiometer 16 is off with io like an adjustment of the switch 11 by one the negative end of the setpoint potentiometer 17 fixed distance. This can result in a higher actual value connected. The wiper 20 of the setpoint potentiometer can be simulated. The grinder 11 is already in front Meter 17 can optionally with a further the actual achievement of the target value, the z. B. Setpoint potentiometer be connected when a sol- is set on the wiper 18, on its potenches is required. Come between the tap 11 of the 15 tial, so that the zero detector 24 responds. Actual value potentiometer 10 and the tap 18 of this then the dosage on a low setpoint potentiometer 15, a first zero-detectable speed is switched over. At the same time Wertor 24. Contacts 33 and 34 are closed between tap 11 of the actual value potential. So that Ik-tiometers 10 and the tap 19 of the second setpoint, the actual value potentiometer on its wiper 11 value potentiometer 16, a second zero detector 20 has a potential which corresponds to the actual actual value 25. A third zero detector 26 lies between the (without lead) corresponding. If this is worth the Tap 11 and tap 20 of the third setpoint value set on the grinder 18 is reached, speaks Potentiometer 17. The zero detectors can switch the zero detector 24 on a second time, and dun h be tronic relays, through which a suitable circuit arrangement is then i! 'c 1220 627 Servo relay energized and drive motors switched over to the next component. being controlled. If for the various components respectively

The desired quantities of the individual components must be set on the wipers 18, 19, 20, and a circuit arrangement can then be used, namely only the quantity of a single grain, as shown in F i g. 3 is shown. There are ponente there, so not Summei. by Soüweiicn. At the beginning of 30 Zwibuicu the Punkie X and Y or the Funkie II , the slider 11 of the actual value potentiometer in and V of FIG. 1 is several potentiometer arrangements and the zero position. All zero detectors are connected in series in the manner of FIG. Zw ₁ -25, 24, 26 in their first switch position. It will now see points X and Y are the potentiometers

the first component is dosed. When the voltage 28a, 28b, 28c between points U and ''

at tap 11 is equal to the voltage at tap 18, 35 are potentiometers 29a, 29b, 29c Jed.s

the zero detector 24 goes into its second Schaltstcl- the potentiometer is through a contact 33 a or ^. lung over. There is a switchover to the second 34a, 33b or 346 ... bridged. The control component. At the tap 19 of the second nominal value of the contacts, the zero detectors 24, 25. Value potentiometers 16 have a voltage against 26 , e.g. B. 33a, 34a, is open, while meter 10 and setpoint potentiometer 15, which of all other contacts are closed. As a result, the sum of the amounts set on the potentiometer 15 and that on the potentiometer for the component in question corresponds to a lead on the tiometer 16, although the actual value page is generated. If the so apparently only the amount of the increased actual value has reached the setpoint value on the potentiometer 16 for the first time. coming component is set by itself. If 45 then the contacts 33a and 34a close so that. this amount is reached, the Nulldetek- as described in connection with FIG. 2, the gate 25 switches over. The third wiper 11 is then metered into the component corresponding to the true actual value until the voltage at the tap 11 emits the same potential. When this potential is equal to that of the voltage at the tap 20 of the third setpoint potential of the setpoint wiper 18, the potentiometer 17 takes place and also a switchover of the 50 switchover to the next component. Equal zero detector 26 takes place. timely open the contacts 33 b and 346, so that the

An arrangement potentiometer 28b and 29b can be used to set a lead. Also used as shown in Fi g. 2 is shown. for the next component there is thus a lead. The circuit arrangement shown there is generated after. Corresponding to a different setting of the removal of the bridges 13 and 14 between the potentiometers 28 b and 29 b, however, the aforementioned points XY and VV can be switched. The lead to be different from the lead in the case of the dosing Jialt circuit contains two setting resistors for the first component. Switched potentiometers 28 and 29 are carried out in the same way, which are connected upstream and downstream of the actual value, then switching and switching to potentiometer 10. next following components.

The sliders 30 and 31 of the two potentiometers 60 Instead of being on the actual value side, the lead can also 28, 29 are coupled to one another and taken into account by a "g" on the setpoint side. A common actuator 32 is adjustable. The circuit is shown in FIG. 4. The scarf thereby so that the grinder 30 with the point Y and direction according to F i g. 4 corresponds in its basic structure with the wiper 31 is connected to the point U , so the circuit of FIG. 1 corresponds. Corresponding that the active parts set on the potentiometers are provided with the same reference numerals and resistors are complementary to one another. like there. In order to take into account a setpoint, the potentiometer 28 is precisely that part between the wiper 18 or 19 of each setpoint of the potentiometer resistor that is active at the potentiometer 15 or 16 and the ußpunkt des

<0

Potentiometer another lead potentiometer 35 or 36 with a wiper 37 or 38. The Slider 11 of the actual value potentiometer is once with the:. Slider 18 of the setpoint potentiometer 15 over the zero detector 24 connected. On the other hand, it is connected to the wiper 37 of the lead potentiometer 35 connected via a lead zero detector 39. The wiper 11 of the actual value potentiometer is similar not only with the wiper 19 of the setpoint potentiometer 16 via the zero detector 25 connected, but also to the wiper 38 of the lead potentiometer 36 via a lead zero detector 40. The lead potentiometers 35, 36 ... maddened to have a resistance that is large against the resistance of the setpoint potentiometer 15, 16, to that the setpoint potentiometer as little as possible and the linearity is not disturbed. In this arrangement, the potential corresponds to am Slider 11 of the actual value potentiometer 10 corresponds to the true actual value. Before the actual value, that on the grinders 18 or 19 the setpoint potentiometer reaches the setpoint, it reaches the part of the setpoint which is tapped at the lead potentiometer 35. Then the lead zero detector 39 responds and can, for example, use a lower dosing speed tax.

When the set target value is reached, the zero detector 24 responds and effects the switchover of the components.

If only the setpoint potentiometers 15, 16, 17 ... were present in the setpoint circuits and if the proportion of the strongest component is, for example, 50%, then all of the adjustments would have to be made Components are carried out on one half of the setpoint potentiometers 15, 16, 17. The full range of the Potentiometer would correspond to a proportion of 100%. In such a case, with the arrangement described, the balancing resistors 21, 22, 23 ... an increase in the resolution and thus the setting accuracy by a factor 2. The series resistors can be set so that the full setting range of the Setpoint potentiometer 15, 16, 17 corresponds to a proportion of the relevant component of 50%, namely the maximum proportion that occurs in one of the components. For setting the individual components double the travel is then available on the potentiometer.

F i g. 5 shows another possibility of taking into account the lead, on the actual value side. Again, corresponding parts are with the same

xo reference numbers provided as in Fig. 4th

A second actual value potentiometer 41 is parallel to the actual first actual value potentiometer 10 switched, in series with the second actual value potentiometer 41 an upstream and a downstream Setting resistor 42 or 43 and a balancing resistor 44 are provided. The grinders 45, 46 the setting resistors 42, 43 are coupled and connected to one another so that the setting resistors in the case of an adjustment in opposite directions by the same amount

ao can be changed. Likewise, the wipers 11 of the actual value potentiometer 10 and 47 of the second actual value potentiometer 41 coupled together. The adjustment of the upstream and downstream setting resistors 42, 43 has a potential effect

like a mechanical adjustment of the grinder 47 relative to the grinder 11. As a result, similar to FIG. 2 on the actual value side set a lead. In contrast to ~ i g. 2 are but separate potentiometers connected in parallel for the "true" actual value and the actual value with a lead

10 and 41 provided.

In the arrangement according to FIG. 5 similar to that of FIG. 4 separate zero detectors 48, 49, 50 or 51, 52, 53 are provided for the lead and the actual value. The zero detectors 48, 49, 50, which should respond with a lead, lie between the wiper 47 of the second actual value potentiometer 41 and each a wiper 18, 19, 19 ', a setpoint potentiometer 15, 16 or 16'. The zero detectors 51, 52, 53 lie between the grinder

11 of the first actual value potentiometer 10 and one wiper 18, 19, 19 'each of a setpoint potentiometer.

For this purpose 2 sheets of drawings

Claims (1)

Patent claims: 1. Electrical control device for a controlled variable comprising several components, with an actual value potentiometer, a plurality of ■ target value potentiometers and a plurality of Zero detectors, which are placed between the tap of the actual value meter and the tap of one each Setpoint huientiometers are switched ", d a - The invention relates to an electrical control device for a multi-component system Controlled variable, with an actual value potentiometer, a plurality of setpoint potentiometers and a plurality of null vectors which lie between the tap of the actual value potentiometer and the tap of a setpoint potentiometer are switched are. Such circuit arrangements are for example " characterized in that the actual value io used for automatic dosing systems, be Potentiometer (10) and each of the setpoint potentiometers (15, 16, 17) are each connected to a separate voltage source (L ¹ O, Ul, Ul, Wi) and the wiper (18, 19, 20) of each setpoint potentiometer with the one end of the adjacent setpoint potentiometer (16, 17...) is connected.