DE1274808B - Inclination scale with a code disk adjusted according to the load-dependent deflection of the scale - Google Patents

Description

Inclination scales with a deflection corresponding to the load-dependent deflection the scale adjusted code disk The invention relates to an inclination scale with a code disk adjusted according to the load-dependent deflection of the scale with binary arranged in radial columns and rows perpendicular to them Elements (features), each column representing a predetermined measured value and whereby a multiple change of characteristics occurs when the decade changes, as well as with a decoding pyramid controlled by a scanning device for the code disk, which via switches arranged in this and actuated by the scanning device controls a display device.

It is known to avoid false displays in intermediate positions a code disk in the upper gear from one measured value to another in each of the The combinations of characteristics assigned to the individual measured values are only displayed in one line To make a change of characteristics. This leads to the well-known CPB codes (Gray Codes) or WRD codes. However, the CPB code is only for further processing of the information economical in the binary system. The WRD code is more favorable for the decimal system, but requires more effort for decoding.

Other codes, especially pure binary codes or all pentadic codes Codes have at the transition between the individual columns of adjacent measured values Change of characteristics in several lines at the same time.

In order to scan these codes, multiple scans are made in the individual lines provided, which of the line that is assigned to the lowest digit precedes or be controlled trailing scanning. Examples of this are the V readings with purely binary codes or the "guard ring" method. These procedures require both a large circuitry and mechanical effort in the sampling stages.

For scales with multiple pointer rotation it is necessary that the circular self-contained code at the transition from one cycle to the next is also free of errors. With the WRD code, this is only after at least twenty times Measured values or with multiples of twenty measured values possible, since the code cycle 20 is. This is a major disadvantage with scales that have a measuring range of ten Have measured values or odd multiples thereof.

The object of the present invention is to provide a binary tetradic To create code and a decoding device adapted to it, which can also be used with multiple Feature change between two adjacent columns with very little effort Switching elements works without errors, and also an error-free tap in the Ten cycle should be possible, which is the case with scales with higher-digit weight values and multiple pointer rotation is particularly advantageous.

This object is now achieved in that according to the invention of the Switches whose switch position changes between two adjacent columns changes the measured value display assigned to these characteristics by a changing switch with the subordinate ones, as a result of the missing change of feature unchanged switches can be represented by bypassing the switched switches is.

If there are at least two adjoining, one each Decade of five or more lines of code matrices, of which four lines the display of the lower-order digits and the remaining lines the display control the digits with higher priority is according to an advantageous embodiment of the invention provided that the last digit in the lower priority A column assigned to a decade has the same feature arrangement as that of the column assigned to the first digit of the following decade and that the digits through actuated by the scanner of the higher order value at this position Switches can be interpreted.

The two unknown digits can then be selected with little effort and be interpreted.

This is done in a development of the invention in that the first indeterminate digits of the columns by means of the digit selection switch a changeover relay operated by the higher order scanner depending on the even number or odd number of the higher value takes place in such a way that the one indefinite digit for even higher ones Place values can be changed to zero and the other indefinite digit to nine, while odd-numbered higher values the one indefinite number in nine and the other indefinite Digit can be changed to zero.

It is beneficial if, in the case of an odd number of decades, the higher A change in characteristics in the middle of a decade for the revaluation of the indefinite Digits of the decade of the lower value.

It has also proven advantageous to use the columns of the four-row Code matrix for the lower value in a manner known per se with a change of feature between the digits 1 and 8 and with two feature changes between the digits 8 and x and y and 1, respectively.

In a further embodiment of the invention with a multiple encircling code disk, in which the end of a last matrix in the beginning the first matrix passes, it is provided that one of the rotations of the Code disk adjustable mirror depending on the number of revolutions photocells are illuminated, by means of which relays assigned to the photocells in a further decoding pyramid contacts for converting the digits of the higher value are switchable.

Finally, in another embodiment of the invention provided that the revaluation of the digits of the higher priority during a Circuit at the transition to the neighboring circuit by illuminating two neighboring, consecutive rotations of assigned photocells with a relay and through the change of feature on a line with the higher priority on the code disk can be carried out by means of a relay in the decoding pyramid.

The invention is based on the drawings of an exemplary embodiment explained in more detail. It shows Fig. 1 a transducer of an inclination balance in a schematic representation, FIG. 2 is a front view of a code disk, F i G. 3 the illuminated code, FIG. 4 shows part of the code in an enlarged illustration and F i g. 5 to 8 parts of an associated decoding circuit.

With the measuring transducer shown in the schematic representation an inclination balance according to Fig. 1 are on a pointer shaft 14, a dial pointer 11, one covered by a scale cover glass 29 and not shown in the drawing Scale and a code carrier designed as an oscillating disk 15 with an in F i g. 2 illustrated, circular code 30 fixedly arranged.

A scanning device is provided for scanning the code 30, which has an illumination lamp 16 and a capacitor 17, an objective 18 as well as a deflecting mirror 19. This optical device creates a radial Detail of the code 30 after deflection enlarged by 900 on a side surface of a photoelectric scanning head 20 shown. In this side area are one below the other light-sensitive photoresistors 34, namely F1, F2, F3, F4, F10 and F20 arranged. One photoresistor is assigned to each line of the code disk 15.

A rack 13 and a form-fitting meshing with this rack, On the pointer shaft 14 non-rotatably arranged pinion 26 form a drive 32. An the end of the set in Fig. 1 approximately at the height of the illumination lamp 16 Toothed rack 13 is attached to the free end of a support bracket 25. The bow-shaped The end of the carrier 25 is connected to the inclination weight device, not shown in the drawing connected to the scales. On the opposite side of the rack 13 is one end of an angled holder 28 attached. At the free end of the holder A deflecting mirror 22 inclined to the holder at 450 is arranged.

One emitted from an illumination lamp 23 and from a semi-condenser 24 light bundle aligned in parallel is reflected on the deflecting mirror 22 in such a way that that depending on the position of the deflecting mirror on two of the two parallelep Rows of photoresistors arranged on a side surface of a scanning head 21 FW1 to FW9 occurs.

The on the code disk 15, z. B. punched out, circular in The closed code 30 (binary code) is concentric to the central axis of the pointer shaft 14 arranged. In the exemplary embodiment, the code 30 has six circular shapes closed, concentric and adjoining lines of light-dark markings (features), with four fields for each decimal place are assigned in a column.

The four outer circles, referred to in the following lines, serve the Representation of the numerical values of the lower decimal place. Since every feature in the Line can only show light or dark, it is necessary for the unambiguous identification of every ten digits of a decade, namely ... .9, to use four such features. This leads to the four lines, with the digits O. . ... 9 each from one of the radial combination of features, hereinafter referred to as columns, exist.

The two inner lines are used to represent the digits of the higher one Decimal place (10t), in this example the numbers 00, 10 and 20.

For unambiguous identification are shown in FIG. 4 the lines with reference numbers provided, namely: Ri, R 2, R 3, R 4, R 10 and R 20. The code 30 is in the exemplary embodiment designed for a scale up to 150 kg weighing range within which the pointer 11 revolves five times. One cycle therefore corresponds to 30 kg, so that in this case one Code matrix with additional rows and columns for the numbers 30, 40, 50 etc. in the second decimal (10t) or for the number 100 in the third decimal (102) not more is required.

The code matrix thus ends after the third column at the number 20 the second decimal, d. H. at 29 kg. With every complete revolution of the code disk 15 the numbers 0 to 9 in the lowest digit (100) are repeated three times (three decades). The digits 0 and 9 are not directly coded, but rather through the two initially indefinite digits X and Y replaced. At the beginning of the first decade So instead of the number 0, there is initially the indefinite number X. This is followed by then the digits 1, 2, 3 to 8.

Then the indefinite digit Y follows, which is for the digit 9 (end of the decade) or the number 0 (new beginning of the decade). At the next change of the decade is then again X. The sequence of digits is the following: X, 1, 2 ..., Y, Y, 1, 2 ... 8th, X, X, 1 etc. The conversion of the indefinite digits X and Y in Figs. 0 and 9 will be explained later.

The logical further development of the sequence of digits on the code disk 15 would in itself lead to the indefinite value "29" for the number 9 at the measured value Y should stand. But since this is followed by X again, Y and X would then be next to each other, which would lead to a not error-free transition. It is therefore for the digit 9 at the measured value "29" also X attached. This ensures the error-free transition. But since the number sequence X, 1, 2 ... 8, X is, there must be a switch from the statement in the higher position about in the middle "Even" into "odd". But this has to do with the decoding of the numbers 1 up to 8 no influence whatsoever, as will be explained in more detail later.

The one from the optical device 16, 17, 18, 19 by the code 30 Stripes of light projected onto the photoresistors 34 of the photoelectric scanning head 20 penetrates that point of code 30 which corresponds to the measured value when the balance is loaded or in the case of several pointer revolutions over one or more entire pointer revolutions Exceeding measured value corresponds.

In Fig. 3 and 4 is assumed as an example that the balance with 28 kg is loaded, so the pointer 11 has not yet completed a full revolution. Then the code disk 15 is given away in such a way that the section assigned to the number 28 of the code is illuminated.

Since there are also dark markings in this section, preserved not all photo resistors 34 light. If the scale is loaded with 28 kg in the part of the code matrix assigned to the number 8 for the first decimal (100) the second photo resistor (F2) and the fourth photo resistor (F4) and in which the Number 20 in the second decimal (101) associated part of the code matrix only the second Photo resistor (F 20) illuminated. All other photo resistors 34 of the number 28 associated section of the code 30 remain unlit.

According to the circuit diagram of FIG. 5, each photoresistor 34 is the Scanning head 20 connected to a relay via a (transistorized) amplifier V, where the four relays belonging to the "ones" photoresistors F1, F2, F3 and F4 with the capital letters A, B, C and D.

The to the two photo resistors F10 and F20 of the numbers 00, 10 and 20 relays belonging to the second decimal (10t) are labeled E and F. in the Circuit diagram according to FIG. 6 are the working contacts of these relays through the corresponding Lower case letters with an assigned index number in relation to those with upper case letters marked relay. The ones with the lowercase u and the subscript Numbers 1 and 2 marked working contacts u, and u, are the one on the left Relay U shown in part of the circuit diagram.

From the in the lower part of the circuit diagram according to FIG. 6 for the Digits of the first decimal (100) and for the numbers 00, 10 and 20 in the second Decimal (lOt) recognizable numeric displays are only those digits of the first and second decimals displayed, their power supply lines at the relevant Switch position are live.

In the circuit diagram according to FIG. 6 drawn with full lines Position is the "rest position" in which the contacts remain, if the photoresistors F 1 to F4 and F 10 or F20 are illuminated. In the working position shown in dashed lines the contacts turned over when the associated photoresistors are not illuminated, so no light can pass through at the corresponding locations of the code 30. In which Circuit diagram of FIG. 6 results z. B. in the case of weighing 28 kg and the Examination of the section of code 30 corresponding to the number 28 for the first Decimal (10 °) following contact position.

According to FIG. 4 are in this position of the code 30 in the four outer, the first decimal assigned rows R 1, R 2, R 3 and R 4 the light paths interrupted to the photoresistors F 1 and F3. The photoresistors F 1 and F3 are therefore unexposed, whereby the contacts a, and c1 to c4 of the relays A and C. into the dashed position (see Fig. 6). This is the current path via the contact that is turned over in the working position, the contact remaining in the rest position b2 and contact c3, which has been folded over in the working position, is released for the number 8. the In this current path lying lamp with the number 8 lights up, or you The connected input magnet for a printing unit or a booking machine becomes effective.

With the two inner ones, assigned to the number 2 in the second decimal Sections of lines R 10 and R20, the light path to the photoresistor F 10 is interrupted, whereby the associated contact e, in the in F i g. 6 drawn in dashed lines Working position is reassigned. This gives the power line with the number "20" Electricity, and a lamp connected to it lights up, or the one connected here The input magnet for a printing unit or a booking machine becomes effective. The transformation of the indefinite numbers X and Y in 0 and 9 happens at the beginning or end of the decade as follows: Assume that the code disk 15 moves from the measured value "28" to the measured value If »29« were moved slowly, a double change in characteristics would occur, namely line R 1 changes from »dark« to »light«, and line R4 changes from »light« to "dark". All other series do not change their characteristics. This leads to, that relay A drops out and relay D responds. With a slow transition from the value »28« for the value "29", it is not guaranteed that this change in characteristics will occur at the same time occurs, rather it is more likely that relay D may respond initially and a time later relay A drops out, or vice versa.

The decoding pyramid of FIG. 6 must, however, correctly indicate the measured value »28« deliver and from a certain point onwards just as clearly the value »2 X« (pron 29). This is now achieved by putting the value "8" and the value "X" only through those contacts are displayed that remain unchanged due to the lack of a change in characteristics have remained, that is, through the contacts b and b2 and the contacts c to C4.

The ones switched by the second change of characteristics are switched over Contacts d, and d2 bypassed.

The higher digits of the second decimal place 10t result in the decoding of the numerical values 00, 10 and 20 by contacts e1 and f and additionally by contacts e2 1, and f the statement "even" or "odd". The statement "odd" leads to the response of the relay U. The contacts 111 and u2 convert the indefinite numbers X and Y into the specific numbers 0 and 9 according to the following scheme: "even odd" (U relay off) (U relay on) X = "O" Y = "9" "9" Y = "O" Since the second decimal (10t) comprises an odd multiple of the number 10, namely 30, one of the codes assigned to these digits, in the present example the code of the digit 20, must have an additional feature change so that at the beginning of its decade it contains the statement "Even" and at the end of its decade the statement "odd" gives.

The code assigned to the number 20 in the decimal 10l therefore delivers in its first half a statement that makes both relays E and F respond, thus the statement "just". In the second half of the code associated with this number on the other hand, only relay E is energized. With both statements the dem Contacts e1 and e2 assigned to relay E in the working position (dashed line) so that in any case the current path for the lamp is numbered "20" is released.

In the second half of the number 20 in the second decimal Code section with the digits 5, 6, 7, 8 and the indefinite X in the first However, only the light beam falling on the photoresistor F 10 becomes a decimal (100) interrupted. The relay E assigned to this code section responds, and its Contacts e, and e2 are in the in F i g. 6 working position shown in dashed lines knocked down. The current path is thus via the contacts e2 and the contacts remaining in the rest position, released for the relay U, so that this Relay responds and its contacts and u2 in the working position (dashed line) be turned over.

When the contacts u1 and 112 are in the working position, the The indefinite X is converted into the definite digit 9 if the contacts a1 and b1 are in the rest position and the contact c, in the working position (dashed line) is knocked down. The conversion of the indefinite Y into the definite number "0" or "9" takes place in a corresponding manner.

The one in the middle of the number 20 assigned to the second decimal The changeover of the display from "even" to "odd" has opened the decoding does not affect, as this display is only used to determine the indefinite Numbers X or Y is required, but the circuits for the numbers 1 to 8 are not to be influenced.

In the case of weighing e.g. B. 29 kg results for the first decimal (100) the following contact position: When fluoroscopic, the corresponding to the number 29 Section of the code 30, the photoresistors F3 and F4 are not illuminated, so that their associated relays C and D respond and their associated working contacts c and d get into the working position (dashed line). This is the Current path for the digits 9 via the idle contacts a1 and b2 as well as via the bite folded contact c, released when the contact u1 of the relay U is also folded in the working position.

Simultaneously with the interruption of the photo resistors F 3 and F4 falling light rays will be assigned to the number 29 when x-rayed Section of the code 30 also includes the light beam falling on the photoresistor F 10 interrupted, so that the relay E associated with this photoresistor also responds. As a result, contacts e1 and e2 of relay E are shown in the circuit diagram F i g. 6 position shown in dashed lines, so that the current path for the Digit »20« is released. The lamp in the current path with the number »20« lights up, or the input magnet connected here for a printing unit or a booking engine takes effect.

By simultaneously in the working position (dashed illustration) When contact e2 is turned over, the current path from the positive pole to the negative pole is via the in rest position located contact f4 closed, so that the relay U responds. The contacts u, and u2 of relay U are in the working position (dashed line). Through this is the current path via the contacts a1 and b1 and the remaining in the rest position Contacts c1 and u in the working position, released for the number 9, see above that the lamp with the number 9 lights up or the input magnet connected here becomes effective for a printing unit or a booking engine.

If the load on the scales is increased by a further 10 kg from 29 to 39 kg, So the dial pointer 11 of the balance shows one in the first third of the second revolution of the dial pointer, then in addition to the already unlit Photo cell F3 (see Fig. 3) also the light rays falling on the photo resistors F1 and F2 interrupted, so that when the first decimal place of the number 39, namely the length section of the code 30 assigned to the number 9, the relay A, B and C address and their respective contacts as, b ,, b2 and c, to C4 in the working position shown in dashed lines in FIG. 6 can be turned over.

The current path in the circuit diagram according to FIG. 6 is then in the working position located contacts a, and b2, c4 and the contact that remains in the rest position u2 closed, so that the current path for the number 9 is released.

When the code disk 15 is rotated and thus the code disk on this disk fixed codes 30 in the position assigned to the first digit of the number 39 at the same time the rack 13 and the deflection mirror firmly connected to it 22 shifted so far in the direction of the illumination lamp 23 that the of this Light bundles emanating from the lamp and deflected at the deflecting mirror 22 onto the photoresistors FW2 and FW3 occurs.

Two in each case on one side surface of the scanning head 21 in succession arranged photoresistors, namely the photoresistors FW1 and FW2, FW3 and FW4 etc. are each connected to a relay via a common transistorized amplifier T1, T2, T3 etc. are connected, namely the photoresistors FW1 and FW2 to the relay T1, the photo resistors FW3 and FW4 to the relay T2 etc.

(see Fig. 7).

If the contact assigned to relay E is in the rest position (see Fig. 7), the current path is from Positive pole to the negative pole via the photo resistor FW 1 and the relay T 1 or via the photoresistor FW 3 and the relay T 2 etc. enabled, provided that the photoresistor FW1 or FW3 etc. is illuminated.

If, on the other hand, the light beam falling on relay E is interrupted, so the contact e3 assigned to this relay is put into the working position, so is the current path from the positive pole to the negative pole via the photoresistor FW2 and the relay T1 or via the photoresistor FW4 and the relay T2 etc. released, provided that the Photo resistor FW 2 resp.

FW4 etc. is illuminated.

If current flows through one of the above-mentioned current paths, the Relays connected in series in these current paths, namely T1 or T2, T3 etc., energized and their associated contacts shown in the circuit diagram of Fig. 8 tl ,, tal2, t10 or t2 ,, t2 ", t2, etc. brought into working position.

In the case of weighing 39 kg, this number remains when illuminated associated length section of the code 30 of the photoresistor F 10 illuminated, so that the relay E associated with this photoresistor does not respond and its contact e3 in the circuit diagram according to FIG. 7 remains in the rest position shown.

As already mentioned, when weighing 39 kg the deflector mirror has 22 moved so far in the direction of the illumination lamp 23 that the photo resistors FW2 and FW3 are illuminated, so that when the contact e3 is in the rest position, the current path released from the positive pole to the negative pole via the contact es and the photoresistor FW3 and the relay T2 connected in series in this current path responds. The this Contacts t2, t 22 and t2 assigned to the relay are included in the circuit diagram F i g. 8 working position shown in dashed lines, so that the current path over the rest position located contact t2, released for the illumination lamp with the number 30 and thus the conversion of the number scanned photoelectrically on the code 30 "00" in the second decimal (10t) in the number 30 in the second decimal (10t) he follows.

The two photo resistors are located in the middle of each corridor illuminated, which lead to one of the relays Tl to T3. The position of the contact e3 is then irrelevant, so that in any case the code 30 photoelectrically scanned number 00, 10 or 20 in the second decimal (10t) in the number corresponding to the handling is converted, e.g. B. the third time in the number 60, 70 or 80 (see Fig. 8).

When the code disk is designed for several decimal places this requires a larger number of rows with light-dark markings, whose dimensions are correspondingly smaller. This will require the photoresistors of the scanning head 21 are arranged closer to each other, but this is due to the dimensions the photo resistors is only possible to a limited extent.

This deficiency is remedied by the fact that the individual rows of Light-dark markings are shifted to each other and the photo resistors accordingly can be staggered or arranged on a gap.

Claims (8)

Claims: 1. Inclination balance with a corresponding to the load-dependent Adjusted the deflection of the scales Code disk with in radial columns and vertical related rows arranged binary elements (characteristics), with each column represents a predetermined measured value and a multiple when the decade changes Feature change occurs, as well as with one of a scanning device for the code disk controlled decoding pyramid, which is arranged in this, by the scanning device actuated switch controls a display device, d a -characterized in that of the switches (a ,; d ,; d2), the switch position of which changes as a result of the multiple Feature change between two adjacent columns (8 on x or y on 1 in lines 1, R4) changes the measured value display assigned to these characteristics a changing switch (al) with the subordinate ones, as a result of the missing change in feature unchanged switches (b, c) bypassing the switched switches (d) can be represented. 2. Inclination balance according to claim 1 with at least two against each other subsequent five- or multi-line code matrices, each comprising a decade, of which four lines the display of the lower-ranking digits and the the remaining lines control the display of the digits with higher priority, thereby indicated that the lower digit is that of the last digit of a decade assigned column (x, y) has the same feature arrangement as that of the first Column assigned to the next decade and that the digits are preceded by from actuated the scanning device (FIO, F20) of the higher value in this position Switches (u ,, u2) can be interpreted. 3. Inclination balance according to claim 2, characterized in that the Selection and interpretation of the initially indeterminate digits of the columns (x, y) by the Digit-selecting switches (u ,, u2) by means of one of the scanning device (fix, F20) of the higher priority activated changeover relay (U) depending on the even number or odd number of the higher priority is made in such a way, that the indefinite digit (x) in even-numbered higher digits in zero and the indefinite digit (y) can be changed to nine, while the odd digit is higher Place the indefinite digit (x) in nine and the indefinite digit (y) can be changed to zero. 4. Inclination balance according to claim 3, characterized in that at an uneven number of decades of the higher value, a feature change in the Middle of a decade for the revaluation of the indefinite digits (x or y) of the decade of the lower value takes place. 5. Inclination balance according to one of claims 1 to 4, characterized in that that the columns of the four-line code matrix for the lower value in itself known way with a feature change between the digits 1 and 8 and with two Feature changes between the digits 8 and x or y and 1 are formed. 6. Inclination balance according to one of the preceding claims 1 to 5 with a code disk rotating several times, with the end of a last matrix in the beginning of the first Matrix passes, characterized that via one of the rotations of the code disk (15) adjustable mirror (22) Depending on the number of revolutions, photo cells (FW 1 to FW9) can be illuminated are, by means of which relays (T1 to Tn) assigned to the photocells in a further decoding pyramid contacts (t1 to ftn) for converting the digits of the higher priority are switchable. 7. Inclination balance according to claim 6, characterized in that the Revaluation of the digits of the higher priority during a circulation at the transition from one to the neighboring th circulation by illuminating two adjacent, consecutive ones Circulations of assigned photocells (FW1, FW2) with a relay (T1) and by changing the feature on a line with the higher priority (R 10) of the code disk can be carried out by means of a relay (E) in the decoding pyramid. Documents considered: French patents No. 1,197,824, 1231229; "Automation Progress", Vol. 5, 1960, H. 8, pp. 257 to 259.