DE1588959A1 - Successor system - Google Patents

Description

Polgesystem The frfivdung concerns a following system with a along a moving element that can be moved in a first path and is influenced by any parameters, that, a follower lags behind.

The invention is based on the object of creating a pole system in which at least one removal device follows the moving member in a simple manner and which is simple and reliable in its nature. In the system mentioned at the beginning, this object is achieved in that a target pick-up device is provided which has at least one target pick-up that moves on a second tap, which is related to the first path, via a main stepping motor that can be driven by pulses. bar, and that one of the acceptance devices influenced the day Control device is provided which controls the supply of the IFapuLge to the stepper motor controls. A particular application of the invention is concerned with Remote measurement of the movements of an instrument display that form. a movable member may have. The system: is but in the same way on movements of movable limbs other kind applicable * for example to an optical image, the shadow of a pointer, a Queek wedge column or a another column of liquid in a transparent tube. Of the The term "moving member" is therefore in accordance with the invention very broad. The stepper motor is usually a device with a rotor having a permanent magnet and a Windings having stator, so the different group. pen of Poles arise, to which impulses are thus supplied; that the rotor determines successive angular positions in the S tatfor and he moves from a position to next moved 'when an impulse is picked up: is pressed. One has another known embodiment of a stepper motor a permanent T: Tagnet on%:? iron switch and a toothed rotor made of iron. This one will when applying impulses to a winding of the statora actuated. A stepper motor as it is currently available, can exactly with. Speeds of 250 pulses per Work second " : It is obvious that the number of driving a Stepper motor required pulses to so the buyer aua a zero position in a predetermined relative time to bring the limb of motion, the rage or the position of the moving limbs eo. These impulses or from Impulses derived from them can then be transferred to a distant one Station. Since only the number of pulses is counted, the Transmission take place over a great distance and for example also wirelessly * A second pickup is preferably provided, which responds to the movement of the first pickup into a zero position.

The movement of the customers can be square or linear.

It is more favorable to train the acceptance photoelectrically so that it can act as a gate as soon as the moving limb is detected, since then there is no physical one Effect on the moving limb occurs, L = ias could influence its position. In a preferred embodiment, the consumer speaks to infrared radiation at.

The buyer does not generate the xm: ulse, rather it does so in more advantageous; alternatively, by a separate pulse source; the more precise, for example by a crystal, controlled at a predetermined frequency.

The number of Im = -, ulre required to drive the stepper motor for a particular movement can either be used in the same place or at a distance Display devices, such as number tubes or Stepper motors to drive a follow-up instrument or to drive a registration device in cooperation to be operated with a movable drawing carrier Furthermore, a greeting from Im.ulsen can also be used for this purpose to operate several separate devices. Furthermore, a warning signal or a controller can be emitted operated if the number of the stepper motor drives benden Im> ulse a preventive: rite number of impulses exceeds C. In most cases, the stepper motor drives the consumer or other devices via a reduction gear on, so that a large number of Ira,.: ulsen a small one ; Corresponds to angular or linear movement and a very high Speed can be achieved. In addition, here " can be increased by the effective torque. A beatiini: ites Translation getricbe can by anothero, with one different reduction ratio according to the application in question. You can also two stepper motors are provided to share one Is reluctant to use its own reduction gear to drive. This arrangement gives the possibility of a game to compensate between the teeth of the gears, the device according to the invention is generally simple and cheap, because reliable stepper motors and reduction gears are cheap, and yet the accuracy can be as high as desired because the output movement of the lower, , Iotor is set according to the impulse applied. In addition, the system is reliable in different temperature conditions and severe impacts.

According to a further feature of the invention, the system has a pickup device which moves under the action of a stepping motor along a path of movement of a movable member and has a pair of pickups which each respond when they are in a predetermined position relative to the moving member. Furthermore, a pulse source for actuating the stepping motor and a device are provided which is controlled by the customer for supplying the pulses to the motor relative to a reference position of the removal device. Then a consumer can supply pulses to the Control the drive of the 1st "lotoro in a direction of rotation, ivd.hrend the other consumer the supply of the impulses to drive the The engine turns in the opposite direction, so that's it Head follows the moving limb. In a preferred arrangement, the two are consumers arranged side by side so that they are under at the same time the influence of a movement song, for example in The shape of an instrument pointer or the like, The relative Versohiebun. twelfth movement, limb, that can be attached to the pointer of a registration instrument, and the customer can be bestinwat exactly because that iao tor is driven until the relative Verochie- exercise is zero. The number of for this movement of the @ l-otors nott; icndi-en Im_) vlse gives exactly the distance, through which the removal device was moved. The impulses supplied to the motor also affect you remotely located display or follow-up stepper motor, playback device or a counting device are supplied, or it can be a capacitance Loading. The position of the Instrument pointer at a remote location and represented on a counter as a digital value will. In all cases either the liauntantri ebs- motor or the remotely arranged follower motor, an output via a sub #, additional gear of the corresponding guess it The invention. also includes the Zehre, an instrument pointer to adjust remotely or an equivalent term so to control or to adjust a customer by doing that the pulse feed-is controlled to such a stepper motor To deliver a pre-determined timsite number of impulses. An advantage of the invention is that the movement no physical contact with the acceptance need to have a direction which is photoelehtrical or magne- can act so that the locomotor does not have any significant load on the pointer carrying the shaft. carries, the moving member also being the pointer itself can. Furthermore, a coding disk or drum or a equivalent device, so adjusted by the stepper motor that they have some instantaneous position of the pointer. You can in the same Way also driven by another stepper motor which is actuated with Gien equal impulses Erie coding disc can, for example, consist of an insulating disc beotehen the a-number of conductive areas who have come in long-centered rings around the middle are arranged and one digit each represents the position - indicating codes @ daxätellene For example, a binary coded disc at. the individual concentric Alternating between isolated and conductive areas Have representation of zero and one in the binary system. At a given moment when the disc after the the last drive step of the 1st iotore is stationary, so the removal device 3.n a predetermined: Zage relative To bring to the beef member, the coding cibe in read in the usual way, for example by Brushing, optically or by other means. The coding signal can then be sent to a remote station ih a single one Transmission can be passed without the long time used 1.tiird, which is necessary to turn the engine into a to bring a predetermined position.

In this way a multiple system can be used with which Help coding elements-each for a separate instrument of a large number of instruments arranged at a station on the display of scoreboards information kom.:en, which are then transmitted to a remote station. Here you can all use the same newspaper, since the different coding elements lead to different ones Times. Can be abgeleeen Another possibility is the @ -specification a coding drum, the axis of which is coaxial with the axis about which the drum is positioned is when the notor moves step by step, using different digits of the Coding can be reproduced by different rings. the ones on the drum circumference are arranged at an axial distance from each other. Here, too, can all information can be read individually, if necessary by using a reading device step by step is moved from one hing to the next, beis @) ielaiieiee using one Stepper motor.

The coding member can be read while it is after performing a step of the motor as a result of a Impulse is stationary. The parts can be arranged be, that the Ableoekopf ü; aer so in alignment with the one or the other; n contact of the coding element in every position is that: no ambiguity as a result eic'r deposition in a conductive area between e: L-lem and an isolated area The invention is particularly advantageously applied there. applies, vio a remotely read instrument a non-linear one Scale has because the number of ttmotorß to drive the stepper motor serving Im? ulse an angle abi land and not a: Scale reading itself, but the coding element can also codified so that the reading indicates the non- linear scale taken into account accordingly and the fourth displayed by the instrument. That X.-occiü rgli ed can, fall; i10't @ Jf: ldi, even at a distant one Place arranged `earth. 34r Kod can be a B3närkod to transmit the information about the pointer position in die'em ninärkod be the co- The threesome can also simply be codified in such a way that in order to; a non-linear scale, as mentioned above, compensates or these effects could also be combined with one another Furthermore, other types of codes could also be used so as to represent the output in the form of a square a, a root or a logarithm, etc. of the pointer reading Direction to drive. At. Fastening a coding element on the shaft of the pick-up is therefore a coded, stored reading (which can be any number and therefore does not have anything to do with the type of i: @ ess3 @ instrument or the scale graduation - linear, non-linear, polar, zero scale, etc. - in relation to oein needs) always immediately available for passing on. This use of a twin acceptor and a code disk eliminates the disadvantage that arises when a code disk is attached to the mechanical part of an indicator or a measuring instrument because the mechanical part of the test instrument is loaded by the inertia of the code disk or by friction of the contacts Since the coding disk continues to move in certain steps, it follows that at no time is there an ambiguity as a result of a reading at a point where one coded reading ends and the next begins If necessary, a stop signal can be applied to the im-) ulstoren leading to the motor so that the coding element is stopped in one of a number of specific positions an AC motor operated by a fixed holding device earth, can be used to let the Nodierse disc follow the pointer, but the stepper motor has the advantage that when reading the coding disc ambiguities are avoided a motor is driven, with each step in magnetic coding the reading carries the pointer for this step. Furthermore, a test system can be created by having two similar, movable members for displaying the same parameter independently of each other Removal devices for the assembled limbs and .a device are provided to determine the difference between the number of pulses required for the removal devices to achieve a triggered position relative to an initial position.

Preferably the pickups move backwards from an initial position proceeding according to a parameter value that is higher than any value that is displayed «should be grounded in such a way that the drive for a removal device is in front of pulses used to display a mover have been disregarded can, whereupon the pulses are counted until the removal device has reached the zero position of the moving element.

If the two counts start at different times in this way, it is because there is a fault in one of the two groups which can be used to monitor the supply of the Im;: u1Qe to a controlled system or a display of a The invention can be implemented in various ways and in various embodiments, which are described in more detail below in connection with the drawing, which contains embodiments of many of the invention. In the Show drawing Figp 1 is a schematic diagram of Darotellunä a first embodiment of a removal device device of the invention to the position of a pointer of a Measuring instrument, Fig. 2 aoc@ls.ubi.ld a view of a pick-up head, like he performed twice in the facility as shown in Fig. 1 is lost, fig. ä a Blobkdiägränm of the device according to Fig.1-, Fig. 4 is a schematic representation of a second Aus-- Guide form of the invention to a pointer st @ indig to run after 5 shows a schematic illustration to explain a third run. -sform of the invention similar to the AusfUhrungeform according to Fig.1-3, each two Customers are impoverished as in Fig. 4, 6 shows a schematic illustration to explain the Influence of a pointer according to Pig.2 on the two Customer;, 7 shows a fourth embodiment of the invention for Use with a personal data carrier., Fig.n a modification of the embodiment of a collector according to Fig. 1, Fig. 9 is a schematic representation of the customers of a Test system g FIG. 10 is a schematic representation similar to FIG. 5 below Use of coding elements In the embodiment according to fig.1 and 2 is on one as a whole with 1 '! designated instrument a pho - << oil: ek- tric take-off head carried by a take-off arm 15 12 arranged, which is referred to as the target customer and gine has small Lamoe 13, which in the abotary of a photocell 14 is. The take-off arm 15 iot kodal zu ' a pointer 16 d * s instrument can be pivoted in such a way that it follows the path of the pointer 15, the lamp and d: @ ePhoto #, elle on opposite sides die2er Bahn are arranged. When the target taker 12 with the pointer 16 cursed what is called the goal, so under the pointer breaks the light beam from the lamp 13 to Photocell 14 so that the latter responds. The removal arm 15 also carries a link 17, that when the target customer 12 is arranged in a given if coincide with the zero position of the xnstrumento- the zero position draws from a lamp 18 to the, Photocell 19 of a further pick-up head 21 broken who is referred to as a zero buyer. The take-off arm 13 is driven by a reduction gear 22-driven by a stepper motor 23, which has a much-- poli @ en Pormanentmagnetetrotor and a stator with a Has number of pairs of medium-tapped windings, who can be differently excited, so much so Rotate the rotor gradually in both directions. Of the The motor is controlled by an electronic switch 24 (see fig. 3) energized, the greater number of plip-flop circuits consists and has two.Liagdnge 25 and 26, which are so arranged are that when a corresponding im-uloes on the one entrance - the step rotor 23 around - a @ nen-Baritt in one direction and when giving up a similar one Impulse on the other input in the in the other direction. The stepper motor is in the DL.ge, calibrated at the speed of several hundred changes to move steps per second. It can be a Stepper motor, for example 48 to 200 different Sohrittatellungen on one turn depending on the number the rotor poles and the stator windings have, The switch 24 receives pulses from a pulse generator 27 via one or the other gate 28 and 29s, namely a forward gate and a backward gate, the repetition frequency of the generator being, for example, 250 per second. The gates 28 and 29 are connected to the photocells of the target and null consumers 12 and 21 via memories 31 and 32; In order to ensure that when a signal dpa zero collector 21 is emitted when the pick-up arm 15 is returned to the zero position, the back gate 29 is closed and the forward gate 28 is opened in such a way that the stepping motor 23 moves the pick-up arm 15 step by step with the target pick-up 12 in the forward direction, so that it chases after pointer 16. When the target customer 12 reaches the pointer 15 and emits a signal, the memories 31 and 32 are actuated in order to close the forward gate 28 and open the backward gate 29, so that the stepping motor 23 now moves the target customer 12 on its pick-up arm 15 moved back to the zero position. .

Under these circumstances, the target recipient swings back and forth on his pick-up arm 15 between a fixed zero, determined by the zero pick-up 21, and a target position corresponding to the position of the pointer 16, and the number of pulses required to drive the motor, to move the target customer from the zero position to the target To move position, yields a digital measure of the position of the pointers. In a preferred arrangement there are 800 Izny: Ulwe needed to get out of the:, Tull position the in this case it is also the zero position of the instr.uraontes .., the corresponding movement up to a target position according to a maximum scale deflection,> In addition to generating a movement of the step mo-iors 23 can the fol-e der 'through the gates and in particular through the forward gate 28 released zm:? ulse used for this cverden, uri any number of external indicators or to operate other devices " In an erfiridun, soaked arrangement, the the forward gate 28 released Im_.ulse used to to control a ring counter that: liit the usual number. of tubes has passed away, so as the number of In,; ulse, an- to show that it is necessary to move out of the Zero position to reach the target position. A such Itin @; counter uses an identical arrangement of Cold cathode tubes to which the impulses are fed and which individually when igniting a bias of the neighboring tube press on, the arrangement so iot that a tube ' not with a pulse alone or a bias alone ignites, but only when both forgünge together come. @ This will sequentially turn the tubes accordingly consecutive impulses and the number of senen 'tubes ignited so that a number corresponding to the the last ignited tube. In Figure 2 is a preferred arrangement of a target collector 12_shown y of the one essentially the shape of a large plastic block showing ü's. with two tendons and a jetty. T he individual legs are so @ drills, d-aso the one pick up the electric lamp 13 can, i @;.;, while in the other the photocell 14 under Ze-- brings Lt. The laape sends a beam of light to the photo tozeile through an opening in the side of a leg, however, its opening is almost closed, so only a very fine slot through a pair of plates 35 and 36 is formed on the end faces of the leg fastened egg. The plates can optionally be in be adjusted in such a way that the desired zero Setting the customer is erreiebt. You can also be set so that such a fine line is created, so that the edge of a very fine padel-like pointer 16 can be easily detected by the photocell 14 can. With many applications, preferably none will be visible Light but infrared light @vercendet. With that, the whole counter 12 has been covered with black zack, which is permeable to infrared radiation, such that now the photocell 14 the presence of the pointer 16 or the Link 17 can determine, but this is the Path not kept free of dust. From Fig.l it follows that the zero taker 12 on a holder 37 is mounted so as to its position with To be able to adjust the help of screws 3a @ .. Dieo is one easy way to precisely adjust the zero position from which the acceptance arm 15 is away. For a beneficial effect, en is often more beneficial, if the electrical power connected to the facility create a short fertilization before the acceptance arm qieh moved backwards to the zero position after having the. Has achieved its objective. In a further embodiment of the invention, the Take-off arm instead of between the zero position and the target Swing back and forth, its rotation from the Continue the zero position beyond the target position and then move on to the zero position and rotate continuously.

It has already been mentioned briefly that the stepping motor 23 is the removal arm 15 drives through a reduction gear 22, and this has the effect that the Conversion of a step by the stepping motor 23 into any desired angle movement of the take-off arm 15 can be reduced according to the reduction. In reality the Beveaung. can be significantly undermined. and this means that a small stepper motor with a very small torque is a considerable one Can generate torque on the .Abnahmearm 15.

The above in detail. The application example described always has one Pick-up arm 15, which follows in a Richturig. In this example is an individual, namely the target buyer / sufficient, but if in a special one Form of execution a chase can take place in both directions, "so the ' Arm have two customers. The customer in question would then - according to the sewing direction excited, and this then became the direction of the mind. the pointer from the zero position Show. A beotim: uten instrument can also have two or there should be more pointers. Each individual could have a separate customer or they can all be determined by the same customer.

In the embodiment according to Pig.4, a pointer shaft 42 carries a light disc 43, which is divided approximately diametrically into two sectors, namely one transparent and one opaque. Perndr are diametrically opposed to each other opposite customers formed by photocells 44 on a rotatable support 45 are arranged., Via a reduction gear 46 from a servo motor 4? is driven, in equilibrium, both consumers are excited.

Each individual consumer has his own lamp 48 and is of this separated by the disc. There is something about the transparent sector of the disc larger centri. angle than the opaque section, so that both are diametrically oppositely arranged customers can just be illuminated at the same time. The collection cells can be enclosed in a white plastic material, the infrared light passes through. A lam.) E can then be used which emits an infrared radiation, If any. Movement of the Instrument wave occurs, so one or the other of the buyer loses his Illumination, as the opaque part of the pane corresponds to a certain The direction of rotation of the shaft comes between him and his lamp.

The Auag @ .nge of the two customers 44 control a pair of gates 23, 29, which can be electronic circuits of a known type, including transistors. If a gate according to the loss of lighting. is opened by the associated cell, pulses from a conventional pulse generator 27, which continuously generates 250 pulses per second, can be passed on to a switch 24. which controls the servomotor 47, which is advantageously a stepper motor of the type described in connection with FIG. Attention, and the effect is that an equal number of Imi) ulsen supplied by both inputs does not result in any resulting movement of the motor shaft. One of the gates 28 controlled by a photocell supplies Imy.ulee to one input of the switch, and. the other gate 29 supplies pulses to the other input, so that depending on any direction of rotation of the. Disc 43 the corresponding gate is opened und.nun Impulses to drive the dead gate in the corresponding rotary are passed on to so the carrier 45 of the To follow wave movement. 311e motor shaft is via the reduction gear 46 in a ratio of 1:24 connected to the carrier carrying the photocells, and turns -this in one direction to the next according to the. Movement - the disc that initiated the process -. de. The result is that, accordingly, the-rotation #. direction of the disk of the carrier follows it so dose the Photocells remain essentially along the line, the the * opaque part tick of the transparent Part of the disc divides The pulses supplied to the servomotor 47 through the gates are connected to another motor through parallel connections 53 added: »heard, which is arranged at a distant place eein can, however, the movement dou servomotor 47 so repeats that an accurate remote indication represents movement of the servomotor 47 success-L, that is, the movement of the See disk 43 and pointer 41 enteprioht. If the pointer and the disc move faster than the -'- the fixed impulse generation is dependent on the If you move the speed, the synchronism is only lost for a short time, because the motor continues to chase in the correct direction until the synchronism is achieved again.

The remote display can also be used on a conventional tube counter or instead of a display by an additional servo motor. Naturally Such a digital display could also be shown on a counter tube counter on the Inotruwent be made by yourself.

Becoming case, the remote display 2roportionalanzeige and is not intended to be an exact reproduction of the Ableauna of Inetrumentenzeigere a, this can easily by using a Untereetzungsgetriebea with a different ratio between the second motor 53 and its output achieved Balle, it is not desired, a disk, as beiopieleweise 43 To connect to the indicator shaft, the pointer can be used, as shown in FIGS. 5 and 6. In this exemplary embodiment, only one is corresponding switched pickup device 55 available, in the two Pickups 56 and 56 'and furthermore only one light source 57 are available to provide customers with a single NEN slot 58 to excite. In the o * tation: #: ren state, the pointer 41 blocks both Customer. Therefore both gates 49 are closed and the Pick-up device remains stnti-fnUr. It could of course the arrangement is made in such a way that both customers are in the static Zuotänd are excited and one switched off when the pointer moves. When the pointer 41 moves, one of the two becomes Pickups 56 and 56 'are excited respectively before the other de-excited, depending on the direction in which the Pointer swings. This dependency is used to, the Open the gate, which is now the pick-up device to the pointer 41 by Be #, ne_ung of the carrier 45 via the motor 47 and the reduction gear 46 continues to run. The initial position of the carrier can be selected from a zero position ment, as it is done by a pick-up device 61 with a single loupe and cell and further by one opaque finger 62 arranged on the carrier 45 is defined, however, the pickup device runs the Once pointer 41 has been found, it follows the same as described above, so that by pre -.-: ending of ziiei cells to distinguish the different directions of the Pointer movement a constant derivation to the ünterochied of the repeated redemption according to the Aua: Ci.ihrun@s- in the case of Pig. 1-3 is present. The durc4eas gate 29 hindurca @; ehenden impulses can-in any of the types described above have been used., In the following there are some possibilities of verifying: -; en- through the gate 28 passing forward or Räckwärtsoini @ lul; -e described. In addition to controlling the actuation of a counter tube counter, as mentioned above, can control the pulses a recording device is used, which has a device device for moving a strip of paper forward over a Table has a slide arranged transversely to the any writing instrument, for example a ball Recorder or other recording device, carries, the carriage then on a pair of parallel len guide rods Bleiton can: The slide is with Using a cord operated around a disc on the one side * and around a drum on the other side. The drum is operated via a reduction gear by a stepping motor similar to the drive of the take-off arm 15 or 45 and is provided with a similar electronic switch. Thus, the drum and with it the writing instrument exactly follows the follow-up movements of the removal army 15a, the movements depending on the number of pulses between the zero position and the target position. The effect is that a series of peaks are now recorded on the paper, which in between go back to zero and have the same height if the instrument reading remains constant. This allows a continuous recording of the operation of the brass instrument during a certain time interval.

A follower head is sui 'along a second pair of guide rods the write head arranged, and dier one or the other of the two heads carries one photoelectric pickups similar to that used in Pig.2, while the other Head deceives an element to which a photocell responds if.the two heads align with each other .. The Uittaufkopß is in the same wine as the writing head, However via a manually adjustable link, driven by a suitable gear, so that he is now on exact limit positions according to an Alarmoäer control device can be set, which comes into action when the instrument reading exceeds a predetermined limit.

A wdii ,, terer way; around the durca. To use the impulses emitted by the forward gate 28, they are fed to a stepper motor so as to provide another instrument; for example via a transmission gear, so that a pern setting of a second instrument can be achieved and the reading of the read instrument can be reproduced several times so that each reading is now recorded in digital form on a constantly moving paper strip, and eg an observer can now be given a list of the various readings in digital form. . It is evident that the information coming from the forward gate 28, which is fed to the input 25 of the switch 24 .. of the stepper motor and which is also passed on via the line for these different types of endunaen, also via a cable over many kilometers or can also be transmitted by radio by carrying out a corresponding pulse modulation of a carrier wave in practice there is space a limit for the boreseh " about which information can be passed on, With some --1 # rn #; endings it would be very useful if that Signa. as a square root of the actual reading of the pointer 16 could be displayed. A procedure, to display this square root, a further device described with the invention --emd.s.:en arrangement can interact and d.ie in Pig.7 is shown ", A recording medium 71 can be positioned between guides 72 slide back and forth, which is guided by a laid cord 73 is driven, `robei one of these disc indicated by a stepper motor and a gear 75 as they have already been described in more detail above are ; Transverse to the direction of movement of the recording medium 71 - there is a buyer 76 similar to the buyer according to FIG Fig.o2, the transverse to the recording medium with the help of a Cord 77 is moved p which is wrapped around discs 78, one of which has a pair of stepper motors and gears ben 79. is driven. Below the path of the recording The carrier is a Larape, the one with the photocell of the buyer 76 via a fine adjustment by two Plates defined slot cooperated the same Tm ,,) ulse both the photocell 76 driving Motor 79 as well as a similar motor drive 81 assigned f: - 9 of a disk 82 is: 5 is g around a not shown put J.Jampe to move to the other side of the slot, so that the photocell and the lamp cross synchronously move to the direction of movement of the recording medium, whereby a mechanical, around the carrier - stretching coupling is avoided " Furthermore, a zero pickup 83 is similar to that here too shown in Pig "2, which is covered with an opaque gen, member 84 carried by the photocell 76 together. acts, so daao the photocell 76 and the lamp from the zero. Position moved away from the impulses in Querrieiztung can be and then be led back so far, b.ia the link 84 is determined by the zero pickup 83, whereupon it can then begin its transverse movement again. The recording medium 71 has a mathematical division 85, as it is referred to, for example, as a square coordinate network. When a pointer reading is made by the take-off arm 15, the pulses used to drive the take-off arm are fed to the motor 75 for driving the transparent recording medium 21 which carries the square division 85. When this movement is fully carried out according to the setting of the pointer 16, the customer 76 is moved with his lamp outside the Nu7,1 position * se-! Far transversely until he meets the square division 85, the @ opaque on a transparent card is. Since the curve is a quadratic curve in the example given, the number of pulses required to drive the pickup 76 for this purpose is equal to the square root of the number of pulses required to set the pointer 16. The pulses derived from the moving pickup 76, that is, the zugeftihrten to Schrittnotor 79 impulses, we can be used above beaöhrieben. The pick-up 76 then returns to its zero position together with the recording medium 85 when the pick-up arm 15 is moved back into its zero position, whereupon the process is repeated. The result is that characteristics that do not obey any quadratic law are also shown on the recording medium 71. Thin, perner result without further ado - even additional uses of the device according to FIG. 7. For example, any desired curve could be recorded by applying a corresponding number of pulses to the recording medium 71 and a writing instrument instead of the pickup 76. is supplied, while a certain curve in K and Y impulses. According to each point of this curve can be analyzed by the fact that the number of pulses required to drive the motors 75 and 79 is registered, so that the consumer 76 to pluohten with points to bring this curve.

Berner can use a large number of instruments, such as beiepieleweiae 11, can be read regardless of whether they are all in one place or in different places Places are available, and furthermore, the necessary to drive the removal arms 15 can Impulae from a central information station. fed. One central control can only be used for this. that switch to adjust a specific or repeated reading on a specific instrument or any combination of such instruments can be used " It can also be used to determine how each particular group of readings is used or otherwise displayed.

The basic principle of using a separate source of koi: impinging pulses to drive a stepper motor until a pointer reading is found has many uses. "The stepper motor and reduction gear are very cheap, and the one in Pig. 2 always gives an exact reading which is independent of vibrations, temperature changes, distance and tension. The reading rivet is reliable and repeatable. The accuracy can be determined in any desired way by choosing an appropriate reduction ratio Even if the pointer 16 has run up, moves very quickly or slowly in both directions, this is there, because as soon as the consumer 12 reaches it, the gate 28 or WC can be operated by the given signf: 7 In order to reduce the supply of the impulses. Generally speaking, the invention can convert an analog quantity (a distance) into a digital quantity The invention has been explained in particular in connection with the determination of the position of an instrument pointer, but it is clear that it has other uses as well Display fluid level in a Rchr. In a translucent Plüesigkeit the meniscus would be similar to a thin pointer tend to act so as the light for photo-cell in the position of the pickup to suspend "Fig..9 shows a system an error check, in such a system or in the Mes ;; The test system uses two similar samplers 12, both of which indicate the level of liquid in a pair of measuring devices 89a and 82a which measure the same amount.

The two tubes 81a and 82a are each provided with a customer 12 in operative connection, the photocell 14 and a lamp 13 on both sides dep tubes in such a way - that the consumer receives light from the lamp when the consumer above the water level. iwt in the pipe, but does not receive any light from the lamp, when the light is interrupted by the liquid in the pipe. The individual customers Bind along the pipe on a nut movably arranged along a vertical Sohraubenopindel thus movable iot, because the screw spindle .in similar wines, as shown in Fig.Q.dargeotellt iat, is rotated.

The rotation of the screw spindle can be controlled by an undercut gear with the help of a Sohritt motor $.

The two ISotoren is zugeßiihrt the same Gruppe'von pulses, so that in each case a customer is driven. When a meeouna is to be made, the buyers are arranged together at the top of the two plushy columns on a trouble above the highest level to be meeeende. When impulses are fed to the two notors, the motors turn gradually and turn at the same time the screw spindles, ƒo then the consumers calibrate downwards Move so far in small steps, until under supervision a Liohtstxahl on a taker upon impact a gate is opened to a Plüƒaigkeitospiegel that is controlled by the output of the customer. The remaining Impulses that drive the motu the removal ro to the bure testicle the drilling entaprochond one Refundability oatend becomes necessary , can n un a display device or a repeat instrument such as above .beaohrieben, fed rrerdene When both of the same devices work properly work, every customer meets the liquidity status in the Tube at the same imnule, and the total, number of zäblten impulses dead the same. However, if there is an error in occurs in one of the detectors, dien is shown in a different number of Im, # uleen per customer until they reach their reference fluid level. Am The difference can then be used to make the feed further I $ pulse to the display device or to repeat instrument, so that a wrong reading reading is recognized and the error can be rectified. If the liquid is mercury, then the Pl: is- light from the customer. However, when it comes to water acts, the bseniskua acts in a similar way to interrupt light. Instead of a threaded spindle To represent could also be a washer and string used to drive the consumer via the stepper motor. at-- drift Q Fig.10 shows how - a stepper motor - or another with. Stepper motor subjected to the dyke impulses can be used around a coding disc or a Drum 92 (which are shown alike) or. an equivalent To position funds like this? daso upon arrival of the customer ä6,56 # in a predetermined position relative to the pointer 41 the disc or drum a corresponding days Has. Dieoe Zage can then go through the usual reading reading of the coded disks or drums devices. "3 or 94 read off, A coding disk 91 consists of an insulating disk with a number of senior administrators who are involved in 's rings are arranged around the center, with each ring is a digit of a code representing the Zage is. For example, a binary code disk in alternately insulating each of the concentric rings and have conductive areas that are zero and one in the binary system mean. At the desired moment - fiblicher pasture, if the coding disk is still the last drive step of the ilotor is stationary so that the customer can to bring a certain position in relation to the movable member gen - the coding disc can be read, whereby customary reading methods are used, for example with the help of brushes or visually or otherwise. That encoded signal can then be sent to a remote station in a single transmission without this all the time needed, which is required in order to Bring the engine into the predetermined position. In this way a multiple system can be built, with the help of which coding disks each for a separate Instrument from a large number of neten measure instruments information about the position pass the pointer on, especially to a remote station. The same newspaper can be used for this uses ivcrden because the differently coded coding heights can be read at different times, Another option is to use a Encoding drum, the axis of which is coaxial with the axis, to which the drum is positioned when the motor is up echrittweiee moves, with - different digits in the coding by lower hollow rings that will sound around the drum and at a distance. are arranged to each other in the axial direction. Here too each ring can be read one after the other, given Allo by having a deflector from a ring in each case to the next using a stepper motor Will be kept The coding disk or the coding drum can over an output shaft operated by a stepper motor 'Reduction gears 46 oo are driven, then Tooamwnen them oloh like a link with the customer. move. If necessary, the coding disk or the coding sequence # can also be excited by a separate stepper motor, which is operated by the same Iml) ulee, did for loading activity is what drives the customer be. @ be etched. In both cases there is no burden the needle to display the tea or any other ren movable member, The Kodioxeo wheel and the coding drum can be removed while they are after the full tour -a moment the Biotore becomes stationary as a result of an impulse are. The arrangement can always be made $ o, that the reading head is in agreement with the one or other contact of the dead link in all such Positions iot. This means that an interdependency is a consequence of the Listen to the reading at any point where A leading area ends and a hustle and bustle begins. The Brtindunn has a particularly favorable application there, where an instrument, whose reading to a distant Station should be passed on a non-linear scale has, because the serving to drive the Sohrittmotore Imjulze approach an angular distance and not that Skalenablesuna itself. However, of course the lodier.- member are codified in such a way that the read display a non-linear scale is taken into account and the sui 'dem Given by the instrument. En should be noted, daos eelbetveratUndlioh the gating link is also located at a remote station can be. The coding can be a binary xod for example Forwarding of information about a needle position in. this binary code aein) or the term could just as well be codified that for a non-linear scale, as described above, a compensation arises, or it these effects could also be combined. Others too Encodings could be used «to put an Auogazg in shape of a square or a root or a logarithmic muses a pin reading according to the relevant Reflect requirements. Of particular advantage is the use of a godierglie- of the on the shaft of the reduction gear, which the Acceptance arm ai, trcibt, if namely dbr acceptance arm with zNvei Customers according to Fig. 4, 5 and 6 instead of an arm according to Fig.9 is forwarded .. Barhit, the take-off arm follows continuously the pointer and only loses it for a short time, if Suddenly he moves faster than the Abnahrlenrm. One Movement of the pointer results in an excitation of the one or the other other customer, so that a drive is now speaking direction is generated. So it turns out that that with I3e.L: fixing of a coding link on the shaft of the tapping arm a coded stored reading (the can be any number and therefore in in no way related to the nature of the instrument .or an Instrunentenekalajd.h. a linear, non- linear, polar scale or zero scale and others. stands) is always immediately available for transfer. This ver. Turn of a Ztvilling pair of pick-up arms and one Coding components avoids the disadvantage of gently - that a coding link is attached to the mechanics of a Instruments or a measuring device is attached, whereby the LZechanismus by the inertia of the.Koder member or is stressed by the friction of contacts. Since that Coding member is also in separate, predetermined steps ten moves, there can be no ambiguity at any time a reading at a point where vain coded The reading ends and the next begins. If the coding , song is read, a stop signal can be sent to the Motor leading impulse gates are given so that the Coding member in one of these predetermined positions for Calm comes Although a pacemaker was mentioned above, so, if necessary, an identical or an exchange oil electric motor operated by circuits , to make the coding element follow the pointer .. but the stepper motor has the advantage that an ambiguous being avoided " Instead of a disc or a drum, a Magnetic tape or a similar device will be terminated which are gradually driven by the motor, whereby every step, for example in magnetic code, the reading of the pointer for this step

Claims (1)

Claims 1. Follow-up system with a movable along a first path, Moving member influenced by any parameters, the a follow-up. lagging, characterized in that one Target removal device (15, 12) is provided, the min- at least one target customer (12) who is on a second, the path related to the first path via a The main stepper motor (23) can be driven by pulses is, and that one of the removal device (15, 12) is influential control device (28, 29) is provided which controls the supply of pulses to the stepper motor. 2. Follow-up system according to claim 1, characterized in that. a zero removal device (21, 37) is provided, which on the .Movement of the target receiver (12) in the zero position speaks. 3. Bolgee system according to claim 1 or 2, characterized in that d "- the target customer (12) on a rotatable carrier (15) is arranged. 4. Falgesyetem according to one of the preceding claims, characterized marked that the target customer (12) is on a line near orbit moves. 5. Polgeeystem according to one of the preceding claims, characterized indicated that the target customer (12) had at least one Photocell assembly (13, 14). F. Polgceystem according to any one of the preceding claims, characterized marked that the an instrument. . (16) is seiger. 7. Polgea system according to one of the preceding claims, characterized characterized in that the movement member is a liquid is. B. Follow-up synthesis according to one of the preceding Auapreche! through this characterized, de.P a Mi tlaufvorrichtung is provided = the; by the pulses added to the main stepper motor (23) can be actuated. 9. Follow-up system according to one of the preceding claims, thereby marked "that the follow-up device has an upper step motor has. 10. Follow-up system according to one of the preceding claims, characterized characterized that the removal device (15, 12) and the Moving member (16) from the follow-up device in the large stand are. 11. Follow-up system according to one of the preceding claims, characterized marked that between the Hauptsahrittmotor (23) and a reduction gear (22) is arranged on the target customer (12) net is. 12. Follow-up system according to one of the preceding claims, characterized characterized in that a coding member is provided which eut- speaking the main stepper motor (23) drivable iot Wig. 10). 13. Polgesysiem according to -, claim 92, characterized. @ oke. @ nzei.ch: co: da.ß a reading device ( 93, 94) for reading off the Zo #? i he --- member (92) is provided (Fi g . 10). 14. _ Pole system according to Claim 12 or 939 net that the node (92) is provided over the Main stepper motor (23) can be driven. 15. Polgeoyefiem according to one of the claims "# 2 - 141 dadore, 1r marked shows that the foder link (; 2) via a motor Q` @) is adjustable, the same impulses as the ( 23) can be supplied (Pig. 10). 16. Polgesyetem ne-ch eini-ia derrarhexge:. @ N @ en marked that two similar or identical &! @ T @@: @@; s members for displaying the same parameter from 2Tp @@@ c ^ aen those with at least one take-off device each üo.iari; Wa-- 'vi.rken, and that a display change should be provided di.o determines the difference in impulses between a target and a target ° 9). 17. Follow-up system after a dor warhergelac_ @ c @ e @ ih: @sJC ;; @ t r thereby characterized in that the decrease gate direction oi_n. ..w: customers (Q.49 48) who the in flight (li g. 4). . 18. Follow-up system according to claim 17, characterized in that ge '@ ennzc: acznet, (:! Aß a target customer (44e 48) each on the one Dewe gun gs-. direction or the opposite direction of movement ... Moving member (41) respond_ @ ;. 4). 19. Follow-up system according to claim 18, characterized in that daQ via the one target customer (44, 48) d - "-. e impulses to the. drove the stepper motor (47) in one direction and over the other target consumer (E1-4, 48) to the drive in the opposite direction are controllable @Fig. 4) ,. 20. Follow-up system after. one of claims 17 d 19, characterized draws, de.ß the target customers (44, 48) diametrically opposite set on the carrier (42) arranged bind q the with a the disc (43) carried by the moving element (41) which is roughly diametrically divided into two sectors, one of which is opaque and the other at least is translucent (Fis. 4), 21. Pole system according to * one of claims 17-19, characterized shows that the two target customers (56, 56 ') next to each other are arranged and with a common instrument pointer (41) or the like work together (Fis. 5 / # . 22. Follow-up system according to one of the. Claims 17-21, thereby characterized draws that a Voni, rtetor @! 28) has pre-empted the im- pulse to drive the main step motor (23) in one direction through, and also a backward gate (29), the impulses for driving the main stepping motor (23): in the opposite direction Direction lets through (Pig. 3), 23. Follow-up system according to claim 22, characterized in that gekennzeiahnotp when the target dimmer (92) arrives in an igtllotstellung the forward gate (28) opened and the R @ icl @ -a @ ttr @ sto: (29) is closed. 24. Follow-up system according to claim 22 or 237 characterized thereby net that when the target customer (12) arrives in a Objective the forward gate (28) closed and the backwash, r - ;;. ".- gate (29) is opened.