DE1548872B2 - METHOD AND DEVICE FOR EVALUATING THE OUTPUT SIZES OF A MEASURING DEVICE - Google Patents

Description

1 2

The invention relates to a method for more than 25% of the difference between these numerical values

Evaluation of the output quantities of a measuring device the lower numerical value and by more than 25%

processing, which as output variables are continuously based on the difference between these numerical values below the higher

consecutive pulses in the form of a or numerical value) at least on average every fourth

several uninterrupted pulse trains with a measurement result of 5, a jump by one measurement unit (from

the measured size of the dependent pulse repetition rate η to n + 1 or from n + 1 to n),

The second - and this disadvantage is still significant-

values determinable through integration or counting borrowed more serious than the former - can with

are, as well as a device for carrying out uncritical transmission of the measured value

of the procedure. io the display device cannot be distinguished whether

A method of this type and an apparatus for a determined change in the number of counters supplied by the measuring device in a measuring period are known from Swiss patent 375 196, for example. impulses for a change in the variable to be measured This known method is used to evaluate or to disturbances or compensation processes within the output variables of a measuring device which can be traced back to the outside of the measuring period. The main problem associated with this output variable is an uninterrupted pulse train with the main problem of methods of the measured variable proportional pulse train of the present type, namely that the determination frequency is supplied from which the measured values cannot be seen by counting the measured value, whether during the development over a given period Determination of this measured value disturbances or can be determined. In the case of the known method 20 identical processes have taken place, two counters have been used so far, one of which has not yet been solved. One recognizes this problem in each case by counting the impulses, if one takes a measurement according to a named impulse sequence using the given period method of the present type with a measurement ( duration) the measured value and the other the in by means of directly indicating Measuring instruments ver the previous period is the same as the measured value 25: In the case of directly indicating measuring instruments stores and outputs as a display value. In the frame you can immediately see the change in the measurement.This principle there are two possibilities, namely value as a result of disturbances or compensation, first of all, the two counters alternate for measuring values and can accordingly wait until the determination is to be used and the measured value has accordingly become constant and the impulse lines coming from the measuring device or equalization processes have ended After each period on the other direct display, the scales clearly show that this operating counter is to be switched, and secondly, one person only reads the weight when the scales have come to the same counter to determine the measured value and to rest. The same applies accordingly to other counters for storing the measured value for 35 for other directly indicating measuring instruments, ζ. Β. and after each period the measured value determined by the moving-coil instruments for current or voltage measurement on the other. If, however, the measured value is to be transmitted through integration counters. In both cases, however, or counting is determined, then a direct display of the measured value is uncritical, ie not possible without any, because only periodically after deviations are checked for correctness on the display run of the integration time or a counting period passed on. Measured value is present, and in this case the can

This uncritical dissemination of the determined measurement measuring person carrying not decide, however, whether value has to the display device two essential the currently present measurement one of about messenliche disadvantages or measured first place, in view of the size exactly corresponding value of f Quantity in the form of a value of the quantity to be measured which is influenced by the numerical value 45 disturbances or compensation processes. Since, in practice, counting pulses are also expected when the number to be measured must be completely constant at certain time intervals, the number of counters will fluctuate even if the number of counters to be measured is completely constant Change the measured value, e.g. B. with impulses in the majority of all practically existing cases that come about mechanically, because when vibrations of the measuring arrangement and during the measurement the value to be measured between two numerical values, electrical values are mostly supplied via the network, of which the lower Numerical value η counting supplied impulses acting on the measuring arrangement and the higher numerical value n + 1 counting electrical disturbance variables as well as network fluctuations, and impulses correspond to the number of counting impulses emitted by the measuring device between η of the determined measured value to the display device and n + 1 fluctuates back and forth, with the statistical fluctuations of the display value being able to cause the ratio of the number of measurement results, which is far greater than the above as the first disadvantage with n + 1 counting pulses to the number of Statistical measurement inaccuracy of a niss e with η counting pulses are equal to the ratio of the 60 measuring unit or one counting unit, this deviation of the variable to be measured from the last-mentioned disadvantage, as already mentioned, is by far lower numerical value to the deviation of the four than the first-mentioned. Taken together to be measured size of the mentioned higher, the two disadvantages explained lead to a practical figure requirement. In practice this means that there is constant fluctuation in the display value, which, even if the variable to be measured is completely constant, its time sequence essentially through the aforementioned first in half of all measurements (namely when disadvantage and its range of fluctuation due to the variable to be measured an intermediate value between said second disadvantage is determined and which has two successive numerical values, which has the consequence that the person carrying out the measurement

with the known method always a larger one Wait for the number of fluctuating display values before it can even form a judgment, in which case it is still not certain whether the measured value which the operator considers the correct measured value assumed is actually correct.

As already mentioned, the two disadvantages of the above-mentioned known method are based and the resulting consequences for the uncritical transfer of the measured value to the Display device without prior checking for correctness. Now it is with measuring methods that do not belong to the method of the present type, in which, however, the measured value is also through a certain number of pulses is displayed and these pulses are counted to determine the measured value are already known, e.g. B. from German Patent 1099191, a review of the determined To ensure that the measured value is correct, that the measured value occurs when the size to be measured, e.g. B. when placing a weight on a scale, and a comparison value when Disappearance of the size to be measured, in the example mentioned when removing the weight by the balance, is determined and the determined values are compared with each other and if they match be brought to the display, but this procedure makes it possible - once one of wants to foresee the possible errors that occur and disappear when the to be measured Size as a result of the swing-in and swing-out processes associated with these processes are given - only afterwards, when the variable to be measured has already disappeared, determine whether it occurs when it occurs The measurement made for the size to be measured was correct, but does not make it possible to determine it the comparison between the measured value and the comparison value, any influencing the measuring process itself To draw conclusions because the comparison result is only available when the one to be measured Size has already disappeared. This procedure is therefore not suitable for measuring a To measure size correctly with certainty, in the sense that one can say in advance that one can and will deliver a correct measurement result from this quantity to be measured, because im In the event of a mismatch in the comparison, this procedure is used at all no measurement or display value. This is of particular disadvantage when the to be measured Size - which is very often the case in technology - is a size that is only available once, because in this case one is with the said procedure in the event of a disagreement in the comparison not at all able to correctly measure the size to be measured, because of the criterion the correctness or incorrectness of the measurement carried out is only available if this unique size has already disappeared again.

The object on which the invention is based was therefore a method of the type mentioned at the beginning Art to find and to create a device for performing this method with which in any case, even with only one-time available sizes, a review of the from the Output variables of the measuring device determined measured value can be carried out for its correctness and with which it can be distinguished for this purpose whether a change in the output variables of the Measuring device on a steady state change caused by a change in the variable to be measured the measuring device or on one caused by disturbances or compensation processes non-stationary change in state of the measuring device is based.

According to the invention this is achieved with a method of the type mentioned in that in

ίο a measuring period by integrating or counting the named output variables over time and / or lengthwise different periods of time a measured value and a comparison value are determined, the comparison value being determined in such a way that with complete constancy of the output values over the measuring period, the measured and comparison values agree, and that the measured value and the comparison value are compared with one another and if they do not match a further measuring period is initiated during the comparison and only if they agree When comparing the measured value displayed and a control period is initiated and that in a Control period the measured value determined in the last previous measuring period is saved and entered Comparison value is determined, which is compared with the stored measured value, and that if they match a new control period in the comparison, and in the comparison if there is a disagreement a new measurement period is initiated.

The advantages of this method over the previously known methods are that, firstly from the output variables supplied by the measuring device with foreseeable absolute certainty the correct measured value, which corresponds exactly to the measured variable, in a self-contained Measurement process is determined, even during the first presence of the size to be measured and thus inevitably also for sizes that are only available once, and that, secondly, only this correct one Measured value and only this is displayed and also the display of this correct measured value already shortly after the measuring device has settled to the size to be measured, d. H. so shortly after Completion of the compensation process caused by the occurrence of the variable to be measured in the Measuring device is present.

In a first particularly advantageous embodiment of the present method, the Period of determination of the comparison value half as long as the period of determination of the measured value, and the change in value of the comparison value per integration or counting unit of the aforesaid Output variables are twice as large as the change in value of the measured value per integration or Counting unit of the output variables mentioned; in this case the period of determination of the Comparison value in measuring periods in the period of determination of the measured value and preferably begins at the same time as this.

In a second advantageous embodiment of the present method, the period is the determination of the comparison value as long as the period of determination of the measured value, and the change in value of the comparison value per integration or counting unit of said output variables is just as large as the change in value of the measured value per integration or counting unit of the mentioned output variables; in this case follow

the periods of determination of the measured value and the comparison value in measuring periods on top of one another.

Both of the above-mentioned embodiments can with a first advantageous variant of the invention Procedure to be carried out in which in control periods the one in the last preceding one Measurement period determined measured value is stored in a first memory and for determination of the measured value this first memory and a second memory is used to determine the comparison value will.

In addition, the above-mentioned second embodiment can also be advantageous with a second Variant of the method according to the invention can be carried out in the likewise in control periods the measured value determined in the last preceding measuring period in a first memory is stored, but a second memory is used to determine the measurement and comparison values from which the value determined in each case deviates from that stored in the first memory Value is transferred to the first memory.

The above-mentioned first variant of the method according to the invention is particularly suitable a device which is characterized by a main memory forming the first memory for determining the measured value by integrating or counting the output variables over the period of time for determining the measured value in the measurement period and storage of the same in control periods, an auxiliary memory forming the second memory for determination one comparative value in each measurement and control period also by integration or Counting of the output variables in each case over the comparison value determination period in the periods, a timer to determine the duration of the periods for the determination of the measured and comparison values, a coincidence circuit to compare the Measured value with the comparison value in each period, and control means for initiating a control period in the event of agreement and a new measurement period in the event of non-agreement in the comparison and for a corresponding distribution of the output variables between main and auxiliary storage.

The above-mentioned second variant of the method according to the invention is particularly suitable a device which is characterized by a main memory forming the first memory to store the value transferred in this until a new value is transferred, an auxiliary memory forming the second memory for determining the measured and comparison values, respectively by integrating or counting the output variables over the assigned period, a timer a coincidence circuit to define the duration of the periods for the determination of the measured and comparison values to compare the value stored in the main memory with that in the auxiliary memory certain value each after determining the latter and control means to initiate a Control period in the event of a match in the comparison and for the transfer of the from the auxiliary memory certain value in the main memory in the event of a mismatch in the comparison.

In the following, the invention is based on two exemplary embodiments with reference to the figures below of devices for carrying out the present method explained in more detail. It shows

F i g. 1 is a block diagram of a device for carrying out the method according to the invention,

F i g. 2 is a circuit diagram of the sequence control 6 in the FIG. 1 shown device,
F i g. 3 shows a block diagram of a further device for carrying out the method according to the invention.

At the two inputs 1 and 2 of the in F i g. 1 shown block diagram of a device for ίο implementation of the method according to the invention the measuring device forming the string balance 3 connected, the two pulse trains as output variables with a variable pulse repetition frequency, from which the weight placed on the scales can be determined is.

The two pulse trains are obtained from the resonance vibrations of two pretensioned strings, the pretension of which is influenced by the weight placed on the scales, with a first string in the sense of an increase and in the case of a second string in the sense of a decrease in the preload. With increasing weight, the resonance frequency Z _{1 of} the first string increases accordingly and the resonance frequency / _{2 of} the second string decreases.

The string balance is now designed so that the ratio of the difference frequency

between the resonance frequencies of the two strings to the resonance frequency f _{2 of} the second string is proportional to the weight G applied. In principle, the equation applies to the string balance

fs

where C is a constant of proportionality with the dimension of a weight. It goes without saying then also the ratio of the frequency

the: th harmonic of the differential oscillation to the resonance frequency / ₂ proportional to the applied weight G, so that the above equation can be written in general form as follows:

_G _ C Ic-Jf-U) C f _m

The difference frequency f _d is obtained in a known manner by mixing the two resonance oscillations, and harmonics of the difference oscillation can either be taken directly from the mixer or generated by frequency multiplication, e.g. B. by rectifying the differential oscillation and filtering out the desired harmonics.

If the string balance is now to have a weighing range from weight O up to a certain maximum weight G _max , then, according to the above equation, the mixer must be able to generate differential frequencies from Ju _n = O up to a maximum frequency fdk ^. In this case, the mixer stage and all downstream amplifier stages would have to have a relative bandwidth

b = fkd "" lfkdo = fkd _ma JO = 00
have that is infinite. To the related

To avoid difficulties, the string balance is loaded with a basic load G ₀ or the basic pretensioning of the strings is chosen so that there is a corresponding difference between the two resonance frequencies / _{1 (1} and / _{2il in the} case of the weight G = O. In the latter case, the equivalent base load

r ^c k

Tkd ,,

The two pulse trains mentioned, which the string balance supplies as output variables, are the pulse trains with the repetition frequencies f _kd and / ₂ . The two frequencies define the weight G placed on the string balance, in accordance with the above statements with the relationship

. _n C fkd _r

In order to determine the weight G as precisely as possible from these output variables, the frequencies be measured as precisely as possible. This task is in principle in the present device known way solved so that the pulses falling in a limited period of time are counted will. In the case of a time segment of, for example, one second, that would then be the one determined during the counting Number equal to the pulse repetition rate in Hertz.

In the present case, however, a fixed predetermined period of time is not required because it is used to determine the weight. According to the above relationship, the two frequencies f _kd and / ₂ need not be determined individually, but only the quotient t _kd / f _z . Because since the pulse repetition frequency f-njT is generally equal to the number η of pulses “per unit of time”, each other is used when forming the quotient

has reached a fixed predetermined value. Then the counting time changes with the repetition frequency /

and thus the time required to determine the measurement result, but with a suitable choice of n. ₂ , the measurement result is such that

Clik ■ g * ■ n ₂ ) = 1
ίο is, in very simple form

G Gq

G * ^kd G *

to disposal. If one also takes into account that the counted number n _u of pulses with the repetition frequency f _{kd is} equal to the counter reading ζ at the end of the count minus the counter reading Z ₀ at the start of counting, i.e. ⁿ kd -ZZ ₀ , ISt

= (ZZ _n ) = 2 - Z ₁

G*

G*

so by suitable choice of the counter _{reading Z 0} at the start of counting so that

Zn =

G*

is also the constant term in the above equation still compensate, and the weight to be determined results in weight units G *, e.g. in grams, directly from the counter reading ζ of the one subjected to the pulse train of the repetition frequency // ^, in the following a counter called a weight counter

35

Tkd

40

Tl ₂

the time out when the time segments T _kd and T ₂ for counting the pulses with the / repetition frequencies f _kd and / _{2 are the} same.

When counting starts and ends at the same time when counting the pulses dex both The weight G is therefore independent of the counting time

G = * -

or as a number equation
G C

n _kd

To achieve this result, the present device must meet the requirements and conditions made in the derivation of the relationship g / G * = ζ.

The present device accordingly has a weight counter 4 which is connected to the input 1 via the gate circuit 5. The input 1 is supplied with the pulse train with the repetition frequency f _{kd from the string balance 3.} Before each weight measurement, the weight counter 4 is set to the counter reading z ₀ taking into account the basic value or the basic load G _{0 in accordance with the above condition}

Λ ■ - '

G ₀
G*

kG *

55 "fkd _a
/ 2 ,,

G * kG * W ₃ 'G *

if n _{kd is} the number of pulses with the repetition frequency f _kd and n "is the number of pulses with the repetition frequency /., from the start of counting to the end of counting and G * represents the" selected weight unit, e.g. G * = 1 g.

Due to the fact that the measurement result is independent of the counting duration, you can wait until the count n _{2 of} the counted pulses with the sequence frequency / _{2 is} set, namely by means of an erasing pulse supplied by the sequence control 6 via the signal line 7 .

The weight counter 4 counts the pulses with the repetition frequency f _{kd which} fall in a measured value determination period. The duration T _{kd of} this measured value determination period is determined by the counter 8. The sequence counter begins to count at the same time as the weight counter and counts the pulses supplied to it via input 2 from the string balance 3 with the repetition frequency / ₂ . After counting a certain number of these pulses, the flow counter 8 outputs via the signal line 9

109532/46

n, =

9 10

to the sequence control 6 from a signal that the be an optimal result with regard to possible The end of the period for determining the measured value results in a high level of measuring accuracy and the lowest possible measuring effect. Achieve duration.

It is accordingly advantageous to choose k so that

! End number n., of pulses with the repetition frequency 5 that n _{2 is} approximately equal to the mean value of n _M within

/ ₂ is determined by the above condition of the measuring range. In this case it results

C / (kG * -n ₂ ) = l ^iÜTk

given, namely to. / e ~ -.

₁₀ ° Ό ~ "~ ^(J max ^IL

C The corresponding kth harmonic is then

Ic G * ' moderately straight from the mixer stage in the string balance

sifting out and input 1 of the evaluation from this relationship, statements about the device can be fed.

derive the duration of the measurement. The duration 15 with the end of the measurement determination time plays an important role, space after counting n ₂ pulses of the sequence as the permissible period between _{the application frequency / 2} by the sequence counter 8 is in Gedes weight and the display of the measurement result weight counter 4 of the Measured value ζ of which is usually limited to the strings. 3 weight G is available.

A statement that can be derived from the above relationship This measured value ζ can, however, differ from the actual one, namely that the number n ₂ of pulses to be counted weight value GjG * due to various errors and thus the duration of the measurement, the greater the possibilities. The Hauptfehlermöglichist, the smaller the chosen unit weight G *, friendliness is the nature of the weighing even more accurate C so the weight is to be determined. justified. Because when a weight is put on, in practice the unit of weight for balances is 25, but each balance initially carries out a settling process, as a rule, so that it takes place in this. It is true that the duration of this transient process is no way of reducing the very short in the case of a string balance, but if the Ge measurement duration results. Even the constant C given by the string balance weight counter within this settling time does not provide a possibility to start counting, then the measured value cannot be faulty due to the reduction of the measuring time, even 30 during the settling process, if there are changes in the structure of the frequencies J _x and J _{2 are} falsified. Taking string scales into account. This is because, in order to detect such incorrect measurements and

To be able to prevent it from showing when C is reduced for definition, the device located in front of a certain weight, the difference frequency f _d , has the auxiliary counter 10 and which must be correspondingly larger and the measurement curve 35 is provided with the coincidence circuit 11.

Q - Q. 4/4 The auxiliary counter 10 works on the same basis

^{d 2} like the weight counter 4, ie it also starts

is almost linear only in a limited range, at the same time with the weight counter and the sequence, so that if the difference frequencies are too great, the measuring counter can be counted and, like the weight counter, the inaccuracies due to the non-linearity of the measurement curve 40 pulses with the repetition frequency f _kd , which are given by the individual, gear 1 via the gate circuit 12, on the other hand, by choosing a suitable one, but with the difference that the auxiliary counter with value k to a limited extent, a reduction of each input pulse by two counting units further in the measurement period can be achieved. That stems from one count. The auxiliary counter therefore has a comparison value corresponding to the measurement f consideration of the formula from which the above relation 45 value ζ is already derived with ^ - for n ₂ . The end of the first half of the measured value determination period is determined and becomes this

Q __ C_ _ ⁿ kd Q time stopped by means of a signal that the

£ X ₂ ° 'run counter 8 from counter reading n _s / 2 via the Si

50 signal line 13 outputs to the inverter 14 and the

The formula states that the measurement result, that is, the termination of the weight G supplied by the inverter 14 to the gate circuit, with a constant ratio of the 12 through-connection signals delivered. Number n _M of the counted by the weight counter Im- This from the auxiliary counter 10 in the first half of the

Pulse for number n ₂ of the measured value determination period counted by the countdown counter regardless of the absolute number n, or 55 is now equivalent to that of the weight counter n _{M of} the counted pulses. With this statement ler 4 in the course of the full determination of the measured value, however, the statistical measurement inaccuracy and the measured value ζ determined during the period of time is only taken into account. The latter is undoubtedly all the greater if the balance was at rest during the entire measured value, the lower the number of pulses counted, the determination period. In all because a missing pulse at z. B. a hundred counted 60 other cases, especially with one still in the pulses an error of 1%, with a thousand pulses falling from the beginning of the measured value determination period, on the other hand, only an error of 1% o the transient process and with other disturbances results. The statistical measurement inaccuracy is therefore the idle state of the balance, such. B. Shaken essentially by the pulse train with the low, there is no correspondence of the most measuring repetition frequency, which determines the smaller Im-value with the comparison value. Of course it would be pulse number n _kd or n., Delivers. Are both pulse numbers theoretically possible that the comparison value n ,. _d and n “ roughly equal, then they supply the same determination period, that is, during the counting period, slow to the statistical measurement inaccuracy. This allows the auxiliary counter, the resulting comparison value

11 12

the coincidence circuit 11 thus only determines whether

determination period, i.e. during the counting period the straight portion of the measured value with the comparison

of the weight counter, the resulting measured value matches, while the odd portion

deviations match, but the probability of the measured value, which is +1 or - 1 counting unit,

The likelihood of such coincidences is so small that it can remain uncontrolled in the 5 gene.

Practice can be disregarded. If there is a mismatch in the comparison,

Instead of the described division of the measuring period, the measuring period is repeated until they agree

and comparative value determination period in which the determination is made.

the comparison value determination period approximately equal other inputs are selected after receipt of the incoming divisions via the signal line 9, z. B. so that the verden, the end of the measured value determination period equal to the first indicating signal by a clear signal over half and the measured value determination period equal to 15 lines 7 and 15 the deletion of the weight, the second half of the Measurement period is. In the latter auxiliary and expiry counter or the resetting of the case, however, with the same period duration of the measurement, weight and auxiliary counter on the base load G ₀ value determination period and thus, as from the corresponding negative counter readings and the remarks above in connection with the Setting of the sequence counter to zero and holding the choice of k can be inferred, the measuring accuracy only 20 gate 5 before the weight counter input by being half as large as in the first case. The latter right maintenance of a division delivered to the signal line 16 is therefore only to be selected if the switching signal is open. The gate 12 in front of the auxiliary counter input, neither with regard to the required measurement accuracy, is there still sufficient reserves available or the sequence counter 8 is opened because its counter reading period is still so far below its permissible 25 so again below η Jl and therefore no signal value is that the required measurement accuracy is transmitted to the signal line 13 so that the inverter 14 can deliver a corresponding increase in the period to the gate 12, a switching signal can be implemented. If these prerequisites are given after the end of the deletion signals begin weight, you can count one step further - auxiliary and run counters, and there will be a comparison value to determine the measured value and the new measuring period in the manner described above use the same counter. In carried out.

In this case, however, a memory has to be used to adjust the coincidence circuit 11 in which one agrees with the first determined agreement when comparing the measured value with Can store the value in order to determine the comparison value and thus the correctness of the to be able to compare the second value with this one. In the following, this possibility is given in the third weight, initially by means of the multiplier 17 Connection with the explanations for FIG. 3 with the unit entered in the keyboard 18 will be discussed in more detail. price of the goods placed on the side scale 3

By comparing that multiplied by the weight counter and then by the display devices

averaged measured value ζ with the 19, 20 and 21 determined by the auxiliary counter, the weight, the price and the

Average comparative value can be displayed according to the unit price.

Above statements are thus determined whether the coincidence circuit 11 delivers in this case Scales send a coincidence signal to the sequence control 6, and during the measurement and comparison value determination mung period was at rest, and since the rest position then causes this after receiving the via the a balance, of course, provided that a signal line 9 is received, the end of the measurement-correct calibration of the same, a signal that indicates a relatively safe period of time for the determination of the pressure terium for the correctness of the weighing, the output to the signal line 16 can be aborted So with the help of the comparison through the determination, through-signal, the closure of gate 5 and whether the balance is at rest during the weighing so that the weight counter 4 and determine the correctness of the weighing. 50 by a clear signal via line 15, the clear

To carry out the comparison of the occurrence of the auxiliary and the sequence counter. Simultaneously

The sequence control 6 sends the measured value determined by the weight counter to the multiplier 17

The comparison value determined by the auxiliary counter is used to carry out a signal via the signal line 22

Coincidence circuit 11. However, this can only depend on the multiplication. As soon as the multiplier is 17

the same whether the even number that the final counter reading 55 is the product of that in the weight counter 4

the weight ζ, which is counted in steps of two counting units, and the weight entered on the keyboard 18

Auxiliary counter forms, with the even portion that has determined the unit price of the goods, he gives over the

Final count of the weight counter forming number signal line 23 to the sequence control 6 a

coincides, since otherwise the end signal indicating the counter completion of the multiplication for each

The odd 60 at the end of the weight counter. The sequence control 6 then effects

Number despite the correctness of the weighing non-agreement output of a switching signal via the signal measurement would be determined during the comparison. line 24 to the gate circuits 25, 26 and 27 the In the present case the weight z, which is based on the binary setting of the weight display device 19 on the electronic counters 4 and 10 built in stages, the setting is in principle realized by setting the positions the 65 of the price display device 20 to the first binary level of the weight counter in the multiplier and the 17 standing price of the goods, and the setting of the auxiliary counter in the comparison not included with the unit price display device 21 on the keyboard

will. 18 entered unit price of the goods. As soon as the

13 14

Setting is complete, the display devices 19 indicate to be included. For this purpose lie in 20 and 21 to the AND circuit 28 in each case one to the end of the connecting lines between the second bishopric the signal indicating the setting, and increments of the weight counter and the auxiliary counter as soon as the signals of all three display devices have arrived and the coincidence circuit 11 has gates 30 and 31, are fen, the AND circuit 28 outputs to the sequence 5 only in measurement periods by the on the signal control 6 via line 29 a display end line 16 is opened, in signal off. However, control periods are closed.

As soon as the display end signal has arrived, the sequence control 6 of both present control means can be provided instead for this purpose, which after completion of the device are based on a first comparison of the counter explanatory control of the weight counter - The status of the auxiliary counter with the counter status of the measured value. This division of the working main counter, a second comparison of the process by two is not absolutely necessary. The con- counts -erhöhten count of the auxiliary troll can, at an identified match at counter with the count ^of: main counter and the comparison, even -schon immediately after the 15 a third comparison start of the counting units measuring period four to-, and then the multiplication increased count of the auxiliary meter with the and the display in parallel to the control of the meter reading - of the main meter, and they are running. In the case of the auxiliary counter before the period by means of the selected workflow, however, in the case of the present device, the result is ^{that the "pre-:} reset pulse is set to a counter reading that" the "auxiliary counter when" multiplied as 20 has a compensation value of two or three 'counting multiplier memories can be used, and units lower than that caused by a' release pulse, the technical effort for the counter reading of the corresponding device caused on the main counter can be kept lower. Main counter lies. Here, further tax

With the auxiliary counter 10, which in any case is provided for determining means, the second and third position of the correctness of the weighing or the rest position 25 comparison only in the event of a disagreement in which the balance is present during the "weighing" ¹ can each previous comparison carry out, and ■ now after determination of the measured value ■ a constant check of the measured value in the weight counter in a control period if there is agreement ^: in one of the three comparison ^{options and in tes for agreement with;} in a running sequence in a measuring period only if the -accurate balance values can be carried out. ¹ The second "possibility of comparison to the sequence control" can be used to give the determined measured value over the entire period a ^: emit a coincidence signal.
Period of time during which ■ the weight is on the 'scales The' control period will 'be checked by the sequence control. The control is carried out after the end of the display signal has arrived, so that the ^: auxiliary counter 10 leads into control pefi, that the sequence control via the signal line bores in each case a comparison value determination 35 32 and the OR circuit 33 to the gate circuit time period per control period - a new -Ver- 12 before the "input of the auxiliary szählers 10 a through equal ^value; determined and zwarin-the same manner as switch signal gives the same time-the Äblaufin the comparative value determination time in the counter 8 and the 'HilfszählerlO on' the ^': signal above. described measuring period, and that this routing is supplied with a clearing signal which sets the 4 equal values from the coincidence circuit 11 with 40 running counter to "zero". The auxiliary counter Ί0 was the one in the weight counter. If, during the comparison, a match is deleted or if a match is found for one of the base load G ₀ ■, a new negative counter reading is set, with a new control period. At the end of the 'clear signal', however, the process mismatch begins - the ^: control counter 8 the trolle fed to it via the input 2 is aborted and a new measurement of pulses with the repetition frequency / and the auxiliary is carried out. counter 10 the dhm via input 1 and the gate

This constant control has the advantage that a circuit 12 pulses with the sequence change in weight during the weighing to immediately count frequency f _M. ^! The auxiliary counter counts is recognized and corrected. Another essential 50 - as in the measuring period in steps of two numbers - advantage of constant control "is the automatic units per input pulse and has a weight corresponding to the value in resetting the scales after lifting the weight counter after the weight has been lifted, the comparison value is determined when the flow counter has reached the control disagreement of the comparison value counter reading nJ2 Measurement continues with the explanation of the measurement period, which now results in the weight 0. The Ge signal is stopped, the sequence counter 8 is therefore switched off from the counter weight display after the weight nJ2 is lifted off via the signal line 13 to the ¹ Intes is automatically reset to the value 0. verier 14 outputs and the termination of the from

It is therefore advisable to limit the tolerance range, ⁶ ° inverter 14 to the gate circuit 12 through-

within which there is still agreement in the switching signal.

is displayed immediately, for the comparison in control, the determined comparison value is now greater within the period than for the comparison in measuring periods half of the tolerance range, which is caused by the non-inclusion do. In the present implementation relationship, this is the first two binary levels of the example realized that the positions of the 65 auxiliary counters and the weight counter in the Verjeweils second binary levels of the weight counter 4 is the same as that in the weight counter 4 and the auxiliary counter 10 only match in the measuring period, each measured value ζ, then there is the coincidence not in the control periods, in the comparison circuit 11 to the sequence control 6 a coincidence

15 16

denzsignal from the implementation of a next 39) for each count position whose inputs with the

Control period causes. assigned to the count position in the working state

In this case, the sequential control system 6 causes the steps located to be connected and the end of the switch output for the comparison value determination switch output after receipt of the step end assigned to the counting position via the signal line 13 input. The flip-flop 34 is in this case a signal indicating the period of time by means of an erasure signal via the line 15 that erases the auxiliary switchable so-called / -X flip-flop.
and the sequence counter or the resetting of the means of the sequence switch 40 are the auxiliary work counters 10 to one of the basic load G ₀ corresponding negative counter statuses "control", "measure", "multiply" and reset ίο and "display" one after the other in an in itself gedes sequence counter 8 to zero and keeps this adjustable via the closed sequence. As long as there is no weight line 32 and the OR circuit 33 of the gate switch is on the scales, the sequence switch in the device 12 is maintained switching signal. After the "control" position and the current front end of the clearing signal, the auxiliary and direction start counting in a controlled manner in consecutive counters, and a new control period is started after the period in a previous measuring period in the manner described above Lifting a weight from the led. Measured by the scales and by the weight indicator

However, if the determined comparison value is not 19 displayed weight value zero,

within the given tolerance range with the Within such a control period is now

the measured value ζ in the weight counter 4 corresponds, ao a weight is placed on the string balance 3. In order to

then the coincidence circuit gives no coincidence - the two repetition frequencies f _kd and / _{2 change} ,

signal to the sequence control 6, and in this and the auxiliary counter 10 determined in the still ver

£) In this case, the sequence control causes the implementation of the remaining part of the comparison value determination

a new measurement period. Period a comparison value that is greater than

For this purpose, the sequence control 6 outputs if there is no 25 zero. As a result, there is the coincidence circuit

of the coincidence signal after receipt of the 11 at the end of the comparison value determination time

Signal line 13 incoming, the end of the space no coincidence signal to which the coincidence

Si- circuit 11 indicating the equivalence determination period with the sequence control 6 connecting

gnals via the lines 7 and 15 from canceling signals to the signal line 43.

the weight, auxiliary and drain counters from, 3 ° In the sequence control, the signal line 43 is the resetting of the weight and auxiliary on the one hand with the input of the AND circuit 44 counter on the base load G ₀ corresponding negative and on the other hand connected to the input of the inverter 45 counter readings and the resetting of the sequence counter. The AND circuit 44 is, however, in the effect of zero. Furthermore, the sequence control position “control” of the sequence switch 40 causes the termination of the closed on the signal line 32 35 because its other input is connected to the signal through-connection signal and a new through-line 16, which is only in the switching signal position on the Signal line 16, which opens gate 5 "measuring" of sequence switch 40 with a signal in front of the weight counter input and via which it is acted upon.

Or circuit 33 of one of the two necessary Since the coincidence circuit 11 at the inverter 45 supplies switching criteria to the gate circuit 12. 40 does not emit a coincidence signal, the inverter indicates. The other switching criterion is when the connection deletion of the sequence counter 8 leading to the AND circuit 46 from the inverter 14 line 47 emits an output signal. Furthermore, there is a supply which, as soon as the count of the sequence counter of the sequence- | i ^ in the "control" position is again below nJ2 , no more input signal is received by switch 40 via signal line 32 to and via signal line 13. After the end of the 45 circuit 46 a signal. Since weight, auxiliary and outgoing signals from the AND circuit 46 begin at both of the input / cancel signals, the running counter counts and a new measurement AND circuit 46 is sent to the OR circuit 48 period in the manner described above through input line 41 of the flow switch 40 is a free, output signal for switching from.

Of the individual in FIG. Blocks 5 ° with shrinkage of the end of the Vergleichswertist below even the internal structure of the determination period indicating signal, the sequencing forming block 6 and the counter 8 n of the sequence of count _2/2 from the operation of this flow controller shown 1 Hand of the signal line 13 emits, are further explained in more detail on both Fig. 2. Inputs of the AND circuit 49 signals, since the

The heart of the sequence control is the sequence switch built up from 55 other input of the AND circuit 49 also with the flip-flops 34 and 35 as well as the AND switch from the sequence switch 40 in the position "accounts 36, 37, 38 and 39" «Signal-40 acted upon with a signal. The combination of the switching elements 34 to 39 line 32 is connected. The AND circuit 49 gives thereby forms the electronic version of a signal via the line 41 and switching signal via the or circuit 50 and the signal line 59 line 42 can be switched further and which sends a signal to the /-.K- flip-flop 51, which sends an output signal to the end-switched output (outputs of the AND signal of the current control period and equations36 to 39) . The release signal for switching the flip-step switch consists of one of the flip-flops 65 which forms flops 51. With the rising edge of the next 34 and 35 formed counters with four in a pulse of the closed sequence arriving via line 52 one after the other adjustable pulse sequence with the repetition frequency f _kd now the counting positions and an AND circuit (36 to flip-flop 51 switched and gives with the

17 18

switch off to input line 42 of the drain switch, which sends the enable signal to reset the flip

ters 40 the switching signal for switching off. Flops 56 forms. With the rising edge of the next

Since on the input line 41 of the drain switch via the signal line 57 incoming pulse of

40 already the release signal for switching on the pulse train with the repetition frequency /, is therefore

stands, the sequence switch is now also reset the flip-flop 56 with this switch. With

signal is switched to the "Measure" position and this resetting of the flip-flop 56 is turned on

thus initiated a measurement period. the signal line 15 output to the auxiliary counter 10

As soon as the flip-flop 51 switching over and the flow counter 8 as a clear signal and the incoming pulse on the line 52 is ended and the AND circuit 58 is fed as a switching signal, no input io output signal of the flip-flop 56 is canceled at the input of the inverter 53 . When there is more signal, the inverter 53 aborts this output signal, and the AND circuit 54 via line 55 also aborts the AND circuit 58 from the output signal via the signal line 7. This means that the weight counter 4 emitted clear signals are now present in both of them.
Inputs of the AND circuit 54 input signals, when the clearing signals are aborted, the weight, auxiliary and flow counters from the flip-flop 51 to the line 42 begin to be counted. The given switching signal and the output signal of the necessary switching through of the gate switching inverter 53. The AND circuit 54 therefore gives device 5 in front of the weight counter input and the gate at this point in time, i.e. when the flip circuit 12 in front of the auxiliary counter input was already flop 51 switching pulse to which JKF] Ip- takes place beforehand, namely the switching through of the gate-flop 56 from an output signal which the enable circuit 5 forms with the switching of the sequence signal for switching the flip-flop 56. With switch 40 to the "Measure" position by the in the rising edge of the next over the line 57 of this position to the signal line 16 and over this incoming pulse of the pulse train with the switching signal output to the gate circuit 5, _{repetition frequency / 2} is now the flip- Flop 56 reversed and the through-connection of the gate circuit 12 also switches and emits an output signal with the switchover to the signal 25 to clear the sequence counter 8 through the one line 15. on the one hand from the inverter 14 and on the other hand from the process -

Since the signal line 15 from the sequence control 6 counter 40 via the signal line 16 and the OR

to the extinguishing pulse inputs of the auxiliary counter 10 circuit 33 delivered to the gate circuit 12

and the sequence counter 8 leads, this is caused by the switching signals.

Flip-flop 56 sent to the .Signallinie 15 30 With the start of counting when the clearing signals output signal is aborted, the auxiliary and the start measuring and comparison value determination sequence counter are cleared or the auxiliary counter period is reset. The measuring period initiated when the sequence is switched to a negative switch 40 corresponding to the base load G ₀ is now the counter reading and the resetting of the sequence counter to zero as above in connection with the explanations. ■ -, · '■' 35 for FIG. 1 already described in more detail, carried out.

The signal line 15 leads on to the one. The auxiliary counter 10 is thus connected to the input from the AND circuit 58, the other input counter 8 of which, when the counter reading " _2/2 " is reached, starts with the "measuring" position. The end of the interconnector 40 is connected to a signal applied to the signal equivalence determination period indicating the Si-Ieitungl6. Since the flow switch 40 is stopped 4 ° and the weight counter 4 runs up to before the switchover ■ of the flip-flop 56 to the digits of the flow counter 8 when the counter reading "Measure" was reached, level n _{2 is present} the signal line 9 output, which accordingly indicate the signal from the flip-flop 56 to the signal line 15 on the signal with the output of the output end of the measured value determination period.

both inputs of the AND circuit 58 input 45 that is from the counter reading « _{2/2 of the} sequence signals. The AND circuit 58 therefore outputs to this counter 8 via the signal line 13 the expiry time, ie with the switching of the flip-flop control 6 and within this the AND circuit 56, to the signal line 7 from an output signal. 49 supplied signal has no effect on the

Since the signal line 7 from the sequence control 6 control processes within the sequence control because

to the erase pulse input of the weight counter 4 5 ° the other input of the AND circuit 49 with the

leads, this causes this from the AND circuit 58 is connected to signal line 32, which is only in the position

the signal line 7 output signal "control" the drain switch 40 with a

Deletion of the weight counter or the reset signal is applied.

of the same to one of the base load G ₀ , from the counter reading n ₂ on, the sequence counter 8 now outputs

the negative counter reading, approximately equal to 55 via the signal line 9 to the AND circuit 62

at the same time as the deletion of the auxiliary and the expiry - the end of the measurement value determination period

counter. indicating signal. Since the other entrance is the

The signal line 15 also leads to the second AND circuit 62, likewise with a signal beauf-enable input of the /-.K- flip-flop 51 Output signal output 60 in the "Measure" position to signal line 16 therefore simultaneously forms the release signal, thereupon the AND circuit outputs a signal to reset flip-flop 51. With 62 via OR circuit 50 and the line 59 Rising edge of the following output signal to the flip-flop 51 from a signal that the end signal the next incoming over the signal line 52 of the current measuring period and at the same time the free pulse of the pulse train with the repetition frequency f _kd 65 output signal for switching the flip-flop 51 forms, the flip-flop 51 is therefore reset and, with the rising edge of the next over the line with this reset, gives the second enable 52 incoming pulse Pulse sequence with the input of the 7-X flip-flop 56 an output signal repetition frequency / _{/; (/} is now the flip-flop 51 reversed

switches and gives the switching signal to the input line 42 of the sequence switch 40 with the switch to switch off.

However, this switching signal can only switch the sequence switch 40 further if the Input line 41 of the sequence switch 40 has a release signal for switching on.

It should be assumed, however, that the balance was in the previous measuring period not yet found completely at rest and that the weight counter within the measured value determination period determined weight value with the comparison value determined by the auxiliary counter does not match. In this case, the coincidence circuit 11 establishes disagreement fixed during the comparison and therefore gives to the one connecting the coincidence circuit with the sequence control 6 Signal line 43 from no coincidence signal. As a result, the AND circuit remains in the sequence control 44, one input of which is connected to the signal line 43, is closed. The other The AND circuit 46 connected to the signal line 43 via the inverter 45 also remains closed because its second input is connected to the signal line 32, which is only in the position “Checking” the sequence switch 40 has a signal applied to it. The AND circuits 44 and 46 therefore do not send an output signal to the OR circuit. Also via the two entrances that To the signal lines 22 and 24 assigned to the positions “multiply” and “display” are connected, the OR circuit 48 does not receive any Input signal. The OR circuit 48 therefore outputs to the input line 41 of the sequence switch 40 no release signal for switching off.

The sequence switch 40 therefore remains in the absence of a coincidence signal even after the supply of the Switching signal via the input line 42 are in the "Measure" position, and the entire measuring period is carried out in the manner described above (starting with the switchover of the sequence switch from the Repeat the »control« position to the »measure« position).

m \ If now when repeating the measurement period

- the balance is at rest and there are no other sources of error, then this new one is correct Measuring period the weight value determined by the weight counter within the measured value determination period with the comparison value determined by the auxiliary meter, at least within the permissible Tolerances. Otherwise the measuring period is repeated until agreement is found is. Then the coincidence circuit 11 determines coincidence and outputs through the signal line 43 to the AND circuit 44 from a coincidence signal. Since the other input of the AND circuit 44 is also acted upon with a signal, namely with that of the sequence switch 40 in the position "Measure" the signal delivered to the signal line 16 is then output by the AND circuit 44 via the Or circuit 48 to input line 41 of sequence switch 40, the enable signal for switching on away.

If now, as in the previous measuring period, the switching signal via line 42 runs in, the sequence switch 40 is switched to the "multiply" position with the switching signal.

Subsequently, in the same way as described above in connection with the transition from the control period to the measuring period, the deletion of the auxiliary counter and the sequence counter and then the resetting is carried out by means of the flip-flop 56 as well as the inverter 53 and the AND circuit 54 of the two flip-flops 51 and 56 performed. In contrast to the transition from the control period to the measuring period, the transition from the measuring period to

ία multiplication of weight counter 4 not deleted, because the AND circuit 58 is closed when the erase signal arrives via the line 15. Because the Sequence switch 40 is already in the "multiply" and position when this clearing signal arrives is therefore not present at the other input of the AND circuit 58 connected to the signal line 16 Input signal.

When switching to the “Multiply” position, the sequence switch 40 acts on the signal line 22 with a signal which is fed to the multiplier 17 via this line and the multiplication of the weight value in the weight counter 4 with the one entered in the keyboard 18 Introduces the unit price of the goods placed on the scales 3.

As soon as this multiplication is finished, the multiplier 17 emits a signal indicating the end of the multiplication via the signal line 23, the OR circuit 50 and the line 59 to the flip-flop 51, which is the end signal of the current period and at the same time the release signal for Switching the flip-flop 51 forms. With the rising edge of the next incoming pulse of the pulse train with the repetition frequency f _kd via the line 52, the flip-flop 51 is switched and when it is switched it sends the switching signal to the input line 42 of the sequence switch 40. Since there is already an enable signal on input line 41 of sequence switch 40, which is supplied by the sequence switch itself in the "multiply" position via signal line 22 or OR circuit 48, the switching signal arriving via input line 42 causes the switching to proceed of the drain switch to the »Display« position.

Following this, in the same way as above in connection with the transition from the Control period described for the measuring period, by means of the flip-flop 56 and the inverter 53 and the AND circuit 54 clears the auxiliary and run counter and then resets the two flip-flops 51 and 56 performed. In contrast at the transition from the control period to the measurement period, however, there is also multiplication / display at this transition, just as with the transition from measuring period to multiplication, weight counter 4 does not deleted because the AND circuit 58 is closed again when the delete signal arrives via line 15 is. Because the sequence switch 40 is in the "Display" position when this extinguishing signal arrives. and therefore gives to the other input of the AND circuit connected to the signal line 16 58 no input signal.

When switching to the “Display” position, the drain switch 40 acts on the signal line 24 with a signal which is fed via line 24 to the inputs of gate circuits 25, 26 and 27 and the connection of the same

21 22

works. Following this, the weighting period begins. display device 19 on the weight counter 4 - the weight value with the advancement of the sequence switch 40, the price display device 20 on the initiated control period is now as above in the multiplier 17 price of the goods and in connection with the explanations for the unit price display device 21 on the in the day 5 F i g. 1 already described in more detail. The unit price of the goods entered in the stature 18, an auxiliary counter 10, is thus set with that of the sequence counter 8. As soon as the setting is completed, when the counter reading nJ2 is reached, the display devices 19, 20 and 21 output to the AND circuit 13, the end of the comparison test 28 each giving a signal indicating the end of the setting value determination period away. io stops.

As soon as the signals from all three display devices are simultaneously this will be the end of the comparison, the AND circuit 28 outputs signals over the signal line 29, the OR circuit 50 and the signal line 13 of the AND circuit indicating the value determination period 49 supplied, device 59 to flip-flop 51 a signal that reports the end of the signal from the other input of the AND circuit 49 that the end signal of 15 if a signal is applied, namely with the current period and at the same time that Release signal from the sequence switch 40 in the position »Konzum toggling of the flip-flop 51 forms. With the rising edge of the next signal sent to the signal line 32 via the line 52, the AND circuit 49 then outputs the current pulse of the pulse train with the sequential OR circuit 50 and the line 59 to the flip frequency f _kd the flip-flop 51 is now switched over 20 flop 51 emits a signal that is the end signal of the running and gives the control period with the switch to the input line and at the same time the release 42 of the sequence switch 40 the switching signal for the signal to switch the flip-flop 51 forms. With continue from. the rising edge of the next over the line

Since the input line 41 of the sequence switch 52 has an incoming pulse of the pulse sequence with 40 already a release signal for switching on 25 repetition frequency f _kd , the flip-flop 51 is now bypassed, which is switched by the in the "Display" position and gives with the switch to the Pending sequence switch itself via the signal output line 42 of the sequence switch 40, the switching line 24 and the OR circuit 48, signal to switch off.
causes the incoming over the input line 42. This switching signal can, however, the sequence switching signal, the further switching of the sequence switch 30 switch 40 only continue when the switch is in the "control" position and thus leads the input line 41 of the sequence switch 40 a free control period after the Display of the determined signal for switching is available,
ten values. Let us now assume that the

Following this, again in the same balance, and have continued to be at rest, and

Way, as above in connection with the over- 35 the comparison value determined by the auxiliary counter is correct

transition from the control period to the measurement period, at least within the permissible tolerances,

wrote, by means of the flip-flop 56 and the in with the still in the weight counter, in the

verters 53 and the AND circuit 54 the deletion of the previous measuring period determined measured value j

of the auxiliary and the sequence counter and then the match. In this case, the coincidence circuit sets j

Resetting of the two flip-flops 51 and 56 by 40 11 agreement and therefore gives over the [

guided. In contrast to the transition control signal line 43 to the input of the inverter 45!

period / measuring period is, however, also in this and at one input of the AND circuit 44;

Transition display / control period, as with the coincidence signal. With the arrival of the coincidence ■

the transitions measuring period / multiplication and signal, the inverter 45 breaks the line ( &

Multiplication / display, the weight counter 4 not 45 47 from the signal delivered to the AND circuit 46, so

deleted because the AND circuit 58 when entering that the AND circuit 46 with the coincidence signal j

of the extinguishing signal via line 15 is closed again. The other with the signal line;

is closed. Because the sequence switch 40 is at 43 connected AND circuit 44 also remains;

Entry of this canceling signal in the position »Kon- closed, because its second input to the signal- j

trolling ”and is therefore connected to the signal line 16, which is only in the position

line 16 connected to the other input of the And "measuring" of the sequence switch 40 with a signal i

Circuit 58 does not receive an input signal. is applied. The AND circuits 44 and 46 \

With the termination of the clear signal on the line, there is therefore no output to the OR circuit 48

device 15 when the flip-flop 56 is reset. Also via the two entrances, the |

start to count auxiliary and expiry counters. The 55 to the positions »Multiply« and »Anj

required through-connection of the gate circuit 12 shows the assigned signal lines 22 and 24.

Before the auxiliary counter input was already done, are closed, the OR circuit 48 does not receive any

namely with the deletion of the sequence counter 8 input signal. The OR circuit 48 is therefore

by on the one hand from the inverter 14 and on the other hand to the input line 41 of the sequence switch 40

from the sequence switch 40 via the signal lines 32 and 60 no release signal for switching off.

the OR circuit 33 to the gate circuit 12 from The sequence switch 40 therefore remains at the established

given switching signals. The gate circuit 5 agreement of the determined in 'the control period

on the other hand, before the weight counter input, there remains a comparison value with that in the weight counter

closed because the drain switch is in the position measured value because of the caused

»Check« is written and therefore to the 65 absence of a release signal for further

The input of the gate switches connected to the signal line 16 also after the switching signal has been supplied

device 5 does not emit a switching signal. via the input line 42 in the position »Kon-

Trolling at the start of counting when the clear signal is aborted, and the entire control period

23 24

is displayed in the manner described above (starting mechanical display of additionally with a

before switching the sequence switch from the närcode provided number wheels. This will make the

"Display" position to "Control" position) has a further advantage that the comparison circuit

Repeatedly until in a control period Not directly checked the displayed value.

Agreement is found in the comparison. 5 F i g. 3 shows a particularly advantageous embodiment

Inconsistency when comparing the example of such a device for through-

Control period determined comparison value with the implementation of the present procedure, in the measurement

the measured value in the weight counter becomes the value and comparison value with the same counter

for example, at the end of the control period, and the memory as a display device

placed in which the previously placed weight is formed.

is lifted. In this case, the same procedure takes place. To explain how this process works, As above with the starting point constantly direction, it should be assumed that to be repeated Control periods described, initiated from the next on one at inputs 63 and 64 off, and at the end of the process there is no weight on the closed string balance and from the weight display device 19 the detected Ge 15 the device the in a previous measured weight value Zero and by the price display device 20 of the period established weight value zero in itself established Price zero displayed and then checked for repetitive control periods, again in constantly repeating control- Under this condition is in the display memory period controlled. 65 the weight value zero, and this is displayed,

In connection with the division of measuring 20 d. i.e., a 2 to hide the display window in front of and benchmarking periods was seen flap is open.

been mentioned above that, when sufficient reserves Within such a control period is now in the required measurement accuracy or the permissible applied to the string balance weight \). The two repetition frequencies f _M and / ₂ in which the measured value determination period and 25 the pulse comparison value determination period fed to the inputs 63 and 64 follow one another can change so that a division can also be selected for the period duration. Follow this when placing the weight. In this case, the measured value and the comparison control period or, depending on the counter reading, the devaluation can be determined with the same counter. There is a running counter 66 when the weight is put on but then a memory must be available, 3 ° at the same time as the end of a measurement period or in which the first determined value can be stored in order to determine the counter value after determining the second value n ₂ is now one more from the counter 67 to be able to compare with this. or less of the weight applied

If this comparison results in a match, counted. As soon as the sequence counter has reached the counter then the value stored in the memory equal to 35 stand n ₂ , it applies the measurement result to be determined to the signal line. The memory 68 with an end signal. The end signal is thus allowed under the prerequisite that it is next fed to the inverter 69, the value stored with the entry only after this end signal has been determined to the gate circuit 70 before agreement between the measured value and the counter input up to this point in time equilibrium value, used directly for display 4 ° level switching signal breaks off and thus the counting, ler 67 stops. The count of the counter 67 is

With a particular advantage, the storage at this point in time could not be zero, since this is a

rather be designed as a display device itself, because part of the weight counted. In the display memory

j jl one of these holds the set numerical value up to 65, on the other hand, the value is still zero. The tough

for a new setting and saves it 45!

with. This is contradicted by the fact that the memory is indeed pointer memory 65 comparing coincidence circuit

should initially save uncontrolled values in order to prevent them from being

to supply the comparison circuit for control purposes, the mood is fixed and no signal is supplied to the signal line 72

and uncontrolled values must of course not be applied to the coincidence signal.

be shown, because it is precisely the purpose of the 5 ° Therefore it is at this point in time, i.e. at the moment

Comparison circuit that only checks for correctness or the occurrence of the end signal of the sequence counter 66,

Values checked for correspondence for the on at input 73 of the sequence switch forming the

show are brought. /-.K-Flip-Flops 75 no release signal, during the

This input 74 of the flip-flop, which is the other input 74 of the flip-flop from the inverter 76 as a display device, receives a release signal from the obstacle 55 which is contrary to the advantageous design of the memory. The / -X flip-flop can be eliminated by a switching signal flap in front of the display window which is to be supplied via line 68 and which is only formed after the rising edge of the end signal of the sequence has established a correspondence between the measured value and the counter , the flip-flop 75 is opened to the comparison value and, if there is no agreement at this point in time, it is set to the "Measure" position and closed again, or by equiva- ⁶ ° and now supplies means via line 78 to the gates, z. B. with a light display through device 79 a through-signal and at the same time to the circuit of the projection lamp in accordance with display memory 65 a signal that mentioned the closing of the mung and disconnection in the event of disagreement to hide the display window by comparison. seen flap causes.

The design of the memory as a display device enables the gate to open further the possibility of the from the memory of the circuit 79, namely that via the line 68 to comparison circuit value to be supplied, immediately carried end signal of the sequence counter, when it arrives to remove from the display means, e.g. B. in the case of the supplied by the flip-flop 75 via the line 78

25 26

th switching signal is already present, the gate circuit 79 is switched through at the end of the end pulse from the display with this switching signal, and the value in the counter 67 now determines the actual weight value. Then transferred to the display memory 65 or at the end of this period of time in the display memory there is again no correspondence with the value 5 in the counter 67, which is canceled. After completing this setting, the flow switch remains in the "Measure" position, the display memory 65 via the line 80 and the flap remains closed, and an end pulse is now emitted, which clears the counter and the sequence counter or sequence counter corresponding to the actual weight value. the resetting of the counter 67 counter value is passed to the display memory 65, to a negative value corresponding to _{the base load G 0.} With the deletion of the closing of the gate 79 and the opening of the, the count of the sequence counter falls again below gate 70.

n ₂ i and thus the end signal of the sequence counter is aborted at this point in time in the display memory 65. When this end signal 15 is aborted, that is, the gate 79 is closed and the counter period determined by the counter 67 is again separated from the display memory and the equilibrium value, which is formed by the flip-flop 75, is obtained via the inverter 69, the aborted running counter is still on "Measure", and the flap of this end signal to gate 70 is still giving a signal in front of the display window, gate 70 is closed in front of counter input 20,
opened again. The scales are at rest now, and so is the counter

At this point in time, the display memory 65 is determined in the next with the termination of the end

the C

Counter 67 determined partial value of the weight, the equal value determination period again the actual

The flap in front of the display window is closed and the weight value is 25. The coincidence circuit 71

the sequence switch formed by the flip-flop 75 is therefore set at the moment in which the sequence counter

stands on "fairs". ler 66 has reached the count n ₂ and the signal

With the termination of the end signal applied to line 68 from display memory 65, the end pulse emitted via line 80, which forms the correspondence between the value in display memory 65 for the counter and sequence counter 30 and the value in counter 67, the counters now begin and the countdown value and supplies a Koinler to the signal line 72 to count. As soon as the expiry counter receives the counter presence signal. Therefore, at the moment when n _{has reached 2} , the counter is stopped again by means of the occurrence of the end signal of the sequence counter 66 at the input 73 of the sequence switch forming the flip the sequence counter end signal, which closes via the inverter 69 and the gate 70, and now stands 35 flops 75 a release signal, while the other one in the counter 67 a value corresponding to the gear 74 of the flip-flop from the inverter 76 placed on the scales, no free weight. However, as received in the display signal. Since, as mentioned, the JK memory 65 still has the trolling period determined in the previous con flip-flop 75 via line 68, the switching signal from the rising edge of the end signal results from the comparison of the 4 ° in the counter of the sequence counter is formed, the flip-flop value with the value 75 in the display memory is set at this moment to the position "Condby the coincidence circuit 71 again no troll, display" and now delivers via the Lei agreement, so that the the flip-flop device 77 sends a signal to the display memory 65, the 75 formed sequence switch in the "measure" position the opening of the mentioned, to cover the waiting / stops and thus also causes the flap in front of the 45 display window, so that the display window remains closed and now the new value now in the display memory 65 in the counter 67 is transferred to the display neuter weight rt is displayed,
memory 65 is transferred. With the end of the transfer of the setting of the display memory 65 to this value in the counter 67 into the display memory at this point in time, the display memory again does not emit an end pulse from the display memory due to the correspondence in the comparison, which causes the counter 67 to be cleared and if this is required, the display memory supplies the end pulse in 79 between the counter and display memory, which indicates the sequence counter 66 and thus the closing of the gate at the end of its setting, and which in this case shortly after the arrival of the end signal opening the gate 70 before the counter input of the sequence counter the line 68 as well as the causes. 55 Control and display signal via line 77.

At this point in time, the display memory contains the

in the previous comparison value determination rather manner as described above the deletion of the

Period of time determined by the counter 67 weight value, counter 67 and the sequence counter 66 and thus the

the sequence switch formed by the flip-flop 75 opens the gate 70 in front of the counter input,

is still on "Measure", and the flap in front of the 60 In the display memory is at this point in time

The display window is still closed accordingly. in the aforementioned measurement value determination period

It should now be assumed that the one determined at the end of the previous comparison balance I looked for agreement in this comparative value determination period The measurement period has not yet been found to be completely at rest, with the comparison value determined by the counter 67 and the actual weight value determined by the counter 67 and checked in the display memory 65, which is determined by the 65 standing weight value, therefore, the sequence switch formed by the flip-flop 75 is now standing actual weight value still decreases somewhat. Also on "Control, Display" and the flap on the Ansoll assume that the counter in the display window is accordingly open, so that the

Claims (29)

27 28 The weight value in the display window is displayed Group of inputs via which the signals are position can be entered into the device, as well as with If the scales remain idle, an output for the output of a signal after operator control will be activated in the following Control periods carried out in which the termination of the recruitment. Serve as a display means Counter in the 5 number wheels after the end of the final pulse. The number wheels are also there ses from the display memory beginning comparison provided with a binary code that of predetermined predetermined time periods can be scanned again the actual photocells. The outrageous weight value is determined. At the end of a course the photocells deliver accordingly in cojeden of these comparison value determination periods of dated form are those set in the display memory The comparison therefore again results in a correspondence numerical value. Furthermore, the display memory is still Mood, the sequence switch remains in the position with a flap to cover the display window »Control, display«, the flap remains open and one solenoid for opening and one for opening opens, and the display memory is provided shortly after closing the flap. It is also starting up of the end signal of the sequence counter that the one-pointer memory still provides an AND circuit, line of a new comparison value determination time 15 whose output to the output for the delivery of the end space or a new control period effect signal is connected, one input of which is connected to the the end pulse. Control line for exciting the electromagnet to If the weight on the scale changes, e.g. B. in opening the flap and its other input with which the previously placed weight is lifted, connected to the output of a delay element then the same process runs as above with the 20. The inputs through which the signals are used for setting Starting point of constantly repeating control- periods are described from the beginning, and at the end of the speaking number of goals that are shown in FIG. 3 through ix process is then symbolized by the display memory of the fixed gate circuit 79, with the assigned indicated weight value zero and connected to the subsequent outputs of the counter 67. Of the ßend again in constantly repeating con- 25 output for the output of the end signal after the end troll periods controlled. The setting is connected to the signal line 80 To the F i g. 3 it should also be mentioned that the connected. The outputs of the photocells are closed for everyone Enlargement of the tolerance range when comparing in comparative binary digits with the assigned Control periods, of course, as well as the one connected in inputs of the coincidence circuit 71. F i g. 1 shown embodiment between 30 The control line for exciting the electromagnet the display memory 65 and the coincidence circuit for closing the flap is connected to the signal line 78 71 as well as between the counter 67 and the Koinzi- and the control line for exciting the electric The gates can be provided, which flow to the opening of the flap with the signal line act that the very low binary digits of the im 77 connected. The input of the delay element The counter 67 and the 35 stored in the display memory 65 are connected to the signal line 68. ;
Values only in measuring periods, but not in control In connection with the periods are included in the comparison. wrestling and the term used in the claims The switching signals are the gates in this "string scales" is to be noted that this loading In the case of the line 78 to be supplied, which is in the handle in the context of the present invention both "Measure" the sequence switch 75 with a set of 40 string scales, for which a mass comparison is is applied gnal. is taken, as well as string scales where Furthermore, in the case of the in FIG. 3, a comparison of forces is made. In Vorridhtung for carrying out the present encryption scales with mass comparison is the mass of the comparable to. \ Proceedings as in the weighed in Fig. 1 shown advantages weight with a comparative composition * direction, a multiplier, a product display unit, 45 aligned in scales with a comparison of forces, which in the one keyboard for entering a unit price in physical terminology are also referred to as a dynamometer, the multiplier and a unit price display device, on the other hand the force of gravity to be provided. In this case, the Multipli- weighing weight is applied with a counterforce, e.g. B. the kanden input of the multiplier to the connec- tion counterforce of a spring. Instead of the gravity line 81 between the display memory 65 and 50 of a weight to be weighed, a string and coincidence circuit 71 can be connected to the balance, on which a force comparison is made connected who will measure in the position. The term used "string control, display" of the sequence switch 75 with balance "therefore limits the measuring process when a signal is acted upon. Furthermore, the instrument does not only focus on the weighing of the weight rate of the multiplier for the end signal after the end, but also includes the force measurement that can be carried out with this instrument with the gates between professionals. product display device and multiplier and between Finally, it should be noted that the Keyboard and unit price display device connected, so the invention does not relate to the two described in more detail above. that the end signal of the multiplier means that the through 60 exemplary embodiments of devices for provides switching signal for these gates. Implementation of the method according to the invention For the internal structure of the individual in FIG. 3 is restricted and that in particular a number The following has to be done: other designs of such devices are possible. The internal structure of the display memory 65 are borrowed. speaks, apart from some of the following claims. Refined additions, the display devices generally known from digital technology with electronic 1. Process for evaluating the output variables mechanical setting mechanism and a ßen of a measuring device, which is used as an output size continuously successive pulses in the form of one or more uninterrupted pulses Pulse sequences with a pulse sequence frequency that is dependent on the measured quantity delivers and the measured values can be determined from their output variables by integration or counting, characterized in that in a measuring period by integrating or counting the stated output variables over time and / or a measured value and a comparison value are determined in different lengths of time, the comparison value is determined in such a way that the output variables are completely constant The measured value and the comparison value agree over the measuring period, and that the measured value and the comparison value are compared with one another are initiated and if there is a mismatch in the comparison, a further measuring period is initiated is displayed and only if they match during the comparison, the measured value and a Control period is initiated and that in a control period the previous one Measurement period is stored and a comparison value is determined, which with the stored measured value is compared, and that if there is a match in the comparison a a new control period and, if there is a disagreement in the comparison, a new measurement period is initiated. 2. The method according to claim 1, characterized in that the period of determination of the comparison value half as long as the period of determination of the measured value and the Change in value of the comparison value per integration or counting unit of the output variables mentioned twice as large as the change in value of the measured value per integration or counting unit of the stated output variables and that the period of time for determining the comparison value falls in measuring periods in the period of determination of the measured value and preferably begins at the same time as the period of determination of the measured value. 3. The method according to claim 1, characterized in that the period of determination of the comparison value as long as the period of determination of the measured value and the Change in value of the comparison value per integration or counting unit of the output variables mentioned just as large as the change in value of the measured value per integration or counting unit of the and that the periods of time for the determination of the measured and comparative value successive in measuring periods. 4. The method according to claim 2 or 3, characterized in that the measured value determined in the last preceding measuring period is stored in a first memory in control periods and that a second memory is used ^{to determine the measured value of this first memory and to determine 6 "of the comparison value} . 5. The method according to claim 3, characterized in that in control periods in the last previous measuring period determined measured value stored in a first memory and that a second memory is used to determine the measured and comparison values, from which the value determined in each case in the event of a deviation from that stored in the first memory Value is transferred to the first memory. 6. Apparatus for performing the method according to claim 5, characterized by a main memory (65) forming the first memory for storing the transferred therein Value until a new value is transmitted, forming a second memory Auxiliary memory (67) for determining the measurement and comparison values, in each case by integration or Counting of the output variables over the assigned period of time, a timer (66) for determination the duration of the time periods for the determination of the measured and comparison values, a coincidence circuit (71) to compare the value stored in the main memory with the value determined by the auxiliary memory Determination of the latter, and control means (69, 70, 75, '78, 79) for initiating a control period if there is a match in the comparison and for the transfer of the information determined by the auxiliary memory Value into main memory if there is a mismatch in the comparison. 7. Apparatus according to claim 6, characterized in that the main memory (65) with Means for displaying the value stored in it is provided in control periods. 8. Apparatus according to claim 6 or 7 for evaluating the output variables of a 'measuring device forming string scales (3), which supplies as output variables pulses with a variable pulse repetition frequency, namely a first pulse train with a repetition frequency that increases with the weight and is equal to the difference frequency f _{d is} between the frequencies Z ₁ and f., two strings of the string balance or equal to an integer multiple of this difference frequency f _d , and a second pulse sequence with the _{string frequency / 2} falling with increasing Gev / icht, the quotient f _d / f _{2 being} proportional is the sum of the issued weight and a selectable constant basic value of the weight-forming characterized by an auxiliary memory-forming (counter (67) for determining the measurement and comparison values in each case by counting falling within the assigned period pulses of the first pulse train, a main memory adjustable number memory (65) for stor eration of the value determined by the counter by setting the number memory to the counter reading of the counter after determining a value that deviates from the value stored in the number memory, a timer forming an expiration counter (66) to determine the duration of the periods for determining the measurement and Comparison values in each case by counting predetermined numbers of pulses of the second pulse train, a coincidence circuit (71) for comparing the value stored in the number memory with the value determined by the counter, and control means (69, 70, 75, 76, 79) for initiating a control period Correspondence in the comparison and for setting the number memory to the counter reading of the counter in the event of non-agreement in the comparison and means for setting the counter in each case Start of counting on a count that takes the basic value into account. 9. Apparatus according to claim 8, characterized in that the number memory (65) with Means for displaying the set numerical value and means for deriving the signals that the Coincidence circuit (71) from the number memory to compare the set numerical value with the value determined by the counter are supplied, is provided by these display means. 10. Apparatus according to claim 8 or 9, characterized in that the number memory (65) is provided with a display window and a flap for covering the display window and that control means (75) for closing the flap in measurement periods and for opening the same are provided in control periods. 11. Device for performing the method according to claim 4, characterized by a main store (4) forming the first memory for determining the measured value Integration or counting of the output variables over the measurement period in the Measurement period and storage of the same in control periods, forming a second memory Auxiliary memory (10) for determining a comparison value in each measurement and control period likewise by integrating or counting the output variables over the period of time for determining the comparison value in the periods, a timer (8) to determine the duration of the periods for the determination of the measured and comparison values, a coincidence circuit (11) for comparing the measured value with the comparison value in each period, and control means (5, 6, 12, 14, 33) to initiate a control period in the event of agreement and a new measurement period in the event of a mismatch in the comparison and a corresponding distribution of the output variables on main and auxiliary storage. 12. The device according to claim 11, characterized by a sequence control (6) with Control means for loading one or more output lines with the one in the main memory (4) contained measured value, to delete the auxiliary memory (10) and to initiate a control period, in which the measured value contained in the main memory and the output variables are only fed to the auxiliary memory for determining a new comparison value, at Agreement in the comparison as well as the deletion of both memories and the introduction a new measurement period in which the output variables are used both in the main memory for determination of a new measured value as well as the auxiliary memory for determining a new comparison value are supplied, if there is a mismatch in the comparison. 13. The device according to claim 11 for evaluating the output variables of a measuring device 60, forming string scales (3), which supplies pulses with a variable pulse repetition frequency as output variables, namely a first pulse train with a repetition frequency that increases with the weight and is equal to the difference frequency f _d between the frequencies Z ₁ and /., two strings of the string balance or equal to an integer multiple of this difference frequency f _d , and a second pulse sequence with the _{string frequency / 2} , which decreases with increasing weight, where the quotient J ₁₁ Ij _{2 is} proportional to the sum of the placed weight and a selectable constant basic value is characterized by a main counter (4) forming the main memory for determining the weight by counting the pulses of the first pulse sequence that fall in the measurement value determination period, an auxiliary counter (10) forming the auxiliary memory for determining the comparison values Counting the in di e comparison value determination periods of falling pulses of the first pulse train, a countdown counter (8) forming the timer to determine the duration of the time periods for determining the measurement and comparison values by counting predetermined numbers of pulses of the second pulse train, a coincidence circuit (11) for Comparison of the counter reading of the main counter that forms the measured value after the measured value determination period with the counter value of the auxiliary counter that forms the comparison value after the comparison value determination periods, and control means (5, 6, 12, 14, 33) for initiating a new measuring period in the event of disagreement in the comparison and for a corresponding distribution of the pulses of the first pulse train to main and auxiliary counters and means for setting the main and auxiliary counters to a count that takes the basic value into account before the start of counting. 14. Apparatus according to claim 13, characterized in that the control means for initiation a control period in the event of agreement and a new measurement period in the event of non-agreement in the comparison, a sequence control (6) and gate circuits (5, 12) between one to which the first pulse sequence is applied Signal line and the main counter (4) and between this signal line and the auxiliary counter (10), and that the sequence control of the sequence counter and the coincidence circuit • Controlled signal generators for the delivery of clear signals for the main, auxiliary and run counters as well as through-connection signals for the gates, which after a the expiration of a period indicating end signal of the expiration counter in the event of a match at the signal indicating the comparison carried out in the elapsed period Coincidence switching signals for deleting the auxiliary counter and the sequence counter and for switching through the gating of the auxiliary counter over the comparison value determination period. and at indicating a mismatch in the comparison made in the elapsed period Signal from the coincidence circuit Signals to clear the main, auxiliary and sequence counter and for switching through the gate circuit of the main counter over the measured value determination period as well as for switching through the auxiliary counter over the comparison determination period submit, and that the main and the auxiliary counter are provided with set inputs that connected to the sequence control (6) via extinguishing signal lines (7, 15) and within the Counters are connected to the individual counting stages in such a way that the clear signals 109 532/40 i 548 If the counter is set to the base value, it will result in corresponding negative counter readings. 15. The device according to claim 14, characterized in that the flow counter (8) with Means for emitting a first time signal after counting a predetermined number of pulses the second pulse train and for the delivery of a second time signal after counting the twice the number of pulses of the second pulse train is provided and that the sequence control (6) with control means (16, 32, 40, 49, 62) for forwarding the first time signal as an end signal into the sequence control in a control period and for forwarding the second time signal as End signal is provided in the sequence control in a measuring period. 16. The apparatus according to claim 15, characterized in that the auxiliary counter (10) with Start of counting of the sequence counter (8) begins to count the pulses of the first pulse train and afterwards the first time signal by closing the gate (12) between the auxiliary counter and the one with the first Pulse train acted upon signal line is stopped. 17. The apparatus according to claim 16, characterized in that the main counter (4) in one Measuring period with the beginning of counting of the sequence counter starts counting the pulses of the first pulse train, increments by one counting unit with each input pulse and after the second time signal with Correspondence in the comparison by closing the gate (5) between the main counter and the with the first pulse train applied to the signal line stopped and if they do not match is cleared during the comparison by the clear signal and that the auxiliary counter (10) with each input pulse increments by two counting units. 18. The apparatus according to claim 16, characterized in that the main counter (4) in one Measuring period with the counting of the countdown counter (8) after the first time signal the pulses of the first pulse train begins to count, with each input pulse by one counting unit continues counting and after the second time signal if there is a match in the comparison by closing of the gate (5) between the main counter and the signal line to which the first pulse train is applied stopped and, if there is a mismatch in the comparison, cleared by the clear signal and that the auxiliary counter (10) also continues to count by one counting unit with each input pulse. 19. Apparatus according to claim 8 or 13, characterized in that the coincidence circuit (11) the position of the counting stage of the main counter assigned to the first binary digit in the Doesn't include comparison. 20. Apparatus according to claim 8 or 13, characterized in that control means are provided are to make a first comparison of the counter reading of the auxiliary counter at the end of a period with the counter reading of the main counter and carry out further comparisons before those of the Counter reading of the auxiliary counter is increased by a certain number of counting units, G5 and to the auxiliary counter at the beginning of the period by means of the erase pulse to a counter reading to set, which is one compensation value lower than that caused by an erase pulse on the Main counter caused the counter reading of the main counter, with the compensation value at least approximately equal to half of the sum of the increase of all of the tax resources can be effected further comparisons, and that this control means is preferably designed are that each of the said further comparisons only in the event of a disagreement with the previous one Comparison is carried out. 21. Device according to one of claims 6 to 20, characterized by a measured value display device (19) and control means for setting the same after a measuring period if there is a match in the comparison to the value stored in the main memory (4), the control means for setting the measured value display device gate circuits ( 25) between the main memory and the measured value display device, which are switched through after a measuring period in the event of a match in the comparison and preferably emit a measured value display end signal after the setting has been completed. f 22. Device according to one of claims 6 to 20, characterized by a multiplier (17) to multiply the measured value with a multiplicand that is used for another of the measured value derivable measurement result is determinative, and by control means for carrying out the multiplication after a measuring period if there is agreement in the comparison and means for input the value stored in the main memory and the multiplicand and means for outputting the Product, the multiplier (17) preferably emitting an end signal after completion of the multiplication. 23. The device according to claim 22, characterized by a product display device (20) and Gate circuits (26) between the multiplier and the product display device, which after completion the multiplication are switched through, as well as by control means for setting the product display device on the product determined by the multiplier, which should preferably be emit a product display end signal after the setting. 24. The device according to claim 22, characterized by a keyboard (18) for setting a unit price forming the multiplicand, a unit price display device (21) and control means for setting the same to the unit price set on the keyboard, which is preferably after completing the setting, emit a unit price display end signal. 25. Device according to claims 21 to 24, characterized by an AND circuit (28), whose input variables are the measured value display end signal, the product display end signal and the Unit price display end signal and are a display end signal after the arrival of all three signals gives away. 26. Device according to one of claims 6 to 25, characterized by at least one on the two working conditions measurement and control and preferably further on at least one of the working states display and multiplication can be set and with this setting the current working status of the device determining sequence switch (40; 75), each having an output for each working state and by control means for interrogating the sequence counter (8; 66) and the coincidence circuit (11; 71) is adjustable and depending on its setting via the associated output (16, 22, 24, 32; 78) the signals for the gate circuits to be switched through in the set working state (5, 12, 30, 31, 44, 46, 49, 58, 62; 79) delivers. ίο 27. The device according to claim 26, characterized in that the sequence switch (40) according to Type of a step switch is constructed to which the control means (44, 45, 46, 48j to query the Coincidence circuit (11) the release signal for switching and the control means (49, 50, 51, 62) to query the sequence counter (8) deliver the switching signal to advance, and that the Control means for interrogating the coincidence circuit in the event of a match in the comparison in a Measurement period as well as in the case of non-agreement in the comparison in a control period a free i) the output signal and if they do not match in the dsm comparison in a measurement period and if they match in the comparison in a control period, they do not provide an enable signal, and that the signals for identifying the current period or the respectively set working state are provided via the assigned outputs (16, 22, 24, 32) are supplied by the sequence switch (40) itself, the sequence switch as a step switch preferably being an electronic counter (34, 35) with a number of counting positions corresponding to the number of working states and one output (16, 22, 24, 32) each. for each counting position, which can be switched further via an AND circuit, one input of which with the control means (44, 45, 46, 48) for interrogating the coincidence circuit (11) and the other input with the control means (49, 50, 51, 62) is connected to query the sequence counter (8). 28. Device according to claims 21 and) 27, characterized in that the sequence switch has three switch positions control, measurement and displays that can be switched on one after the other in a self-contained sequence, and that it is in the display position via the assigned output to the gate circuit between Main memory and measured value display device the switching signal and its release signal input via an OR circuit assigned to the control means for interrogating the coincidence circuit the release signal for advancing supplies and that the measured value display end signal a is supplied to the control means for querying the sequence switch associated OR circuit and triggers the switching signal to switch to the control switch position. 29. Device according to claims 24 and 27, characterized in that the drain switch (40) has four switch positions control, measuring, multiplying and display, one after the other can be switched on in a self-contained sequence, and that it is in the multiply position Via the assigned output (22) to the multiplier (17) the signal for implementation the multiplication and to its release signal input via one of the control means (44, 45, 46, 48) for interrogating the coincidence circuit (11) assigned first OR circuit (48) the release signal to advance and in the display position via the assigned output (24) to the gate circuits (25, 26, 27) between Main memory (4) and measured value display device (19), between multiplier (17) and product display device (20) and between the keyboard (18) and the unit price display device (21) the switching signal and at its release signal input via the first OR circuit (48) the release signal for advancing supplies, and that the end signal of the multiplier (17) after completion of the multiplication one associated with the control means (49, 50, 62) for interrogating the sequence counter (8) second OR circuit (50) is supplied and the switching signal for switching to the Switch position display triggers and that the display end signal also of the second OR circuit (50) is supplied and the switching signal for switching to the switching position Control triggers and that switching means for the use of the auxiliary memory (10) are provided as a multiplier memory in the multiplication period. 1 sheet of drawings