EP3071501B1 - Method for operating a lift control device - Google Patents

Description

The invention firstly relates to a method for operating an elevator control device. Furthermore, the invention also relates to a computer program for implementing the method and to a computer program product with such a computer program and to a device, for example an elevator control device, having such a computer program as means for carrying out the method.

The operation of an elevator installation by means of an elevator control device and at least one drive controlled by the elevator control device for moving at least one elevator car is known per se. The elevator control device controls the movement of at least one elevator car in at least one elevator car shaft. The or each elevator car - the following description is continued without waiving further generality using the example of an elevator car - drives individual floors under the control of the elevator control device and in each case executes a floor stop at a predetermined stop position. The predetermined stop positions are due to the number of floors that connects the elevator car shaft and due to a lower edge of the individual floor doors. A holding position is then that position of the elevator car in the elevator car shaft, in which a lower edge of the landing door and a lower edge of the car door are aligned or at least substantially aligned.

The drive controlled by the elevator control device for moving the elevator car is usually a drive in the form of an inverter fed by a supply network with an electric motor connected downstream of the converter. By generally known per se control of the motor-side part of the inverter (inverter) succeeds influencing the electrical power reaching the electric motor by frequency and amplitude, so that in particular the speed of the electric motor and thus the resulting speed of movement of the elevator car in the elevator car shaft influenced and predetermined by the elevator control device can be.

For the above-mentioned floor stop, a position information referred to hereinafter as an actual position is compared with a stop position predetermined for the floor stop. The position information used as actual position receives the elevator control device from the drive. These are, for example, data on the speed and the rotational position of the drive. Such data are provided in a manner known per se by electric drives for retrieval by an external control, here the elevator control device.

If the actual position and the holding position coincide within predetermined limits, the holding position is reached. The elevator car is then in a position where the car doors can be opened to the respective floor to allow passengers to get out or waiting passengers to board.

However, it turns out in practice that the desired stopping position is not always approached with the actually desired accuracy - referred to in the technical terminology as Landgenauauigkeit -.

From the US4629034 and US2005230192 Methods according to the preamble of claim 1 are known.

An object of the invention, starting from this situation, is to specify a method for operating an elevator control device provided for controlling and monitoring the movement of at least one elevator car, which already improves the accuracy when approaching a respective holding position at the floor stop and / or subsequent detection of the landing accuracy Successful floor stops allowed.

This object is achieved with a method for operating an intended for controlling and monitoring the movements of at least one elevator car elevator control device having the features of claim 1.

• Die Aufzugskabine fährt in grundsätzlich an sich bekannter Art und Weise unter Kontrolle der Aufzugssteuerungseinrichtung einzelne Stockwerke in einem Gebäude an und führt dabei an einer vorgegebenen Halteposition jeweils einen Stockwerkhalt aus.

For this purpose, the following is provided in such a method:

• The elevator car moves in a manner known per se, under control of the elevator control device, to individual floors in a building and in each case executes a floor stop at a predetermined holding position.

In connection with a floor stop, a total error in the form of a deviation of an actual position of the elevator car and a position of the elevator car assumed as an actual position is determined. The assumed as actual position position - hereinafter referred to briefly as actual position - is determined based on drive data of the elevator car, so based on data that are available as speed, angular position and the like of a controlled by the elevator control device drive and / or inverter. It should be emphasized, however, that the actual position managed by the elevator control device is an assumed position. The total error expresses a deviation between this actual position and the actual position. This total error can be evaluated statistically to check whether floor levels are done properly and the respective holding positions are approached with the actually desired land accuracy. Additionally or alternatively, a Vorhaltwert is determined based on the total error. In the simplest case, the resulting derivative value corresponds to the underlying total error. This Vorhaltwert is taken into account in a next executed by the elevator control device for starting the respective holding position comparison of actual position and holding position in addition to the actual or the holding position.

The advantage of the approach described here and in the following is therefore that with the total error determined a statement about the accuracy of the land, with which a stop position is approached, is possible and / or that the stop position can be approached more precisely by entering in the form of the derivative value Error, which had resulted from a previous start of the stop position, is taken into account. In a particularly simple situation, the drive for moving the elevator car is therefore not stopped only when the respective actual position and the holding position agree within predetermined limits, but already when the actual position is in an area defined by the Vorhaltwert located around the stop position. The possible with the detection of a total error or multiple total error statement about the accuracy of land, with which a stop position is approached, as evidence of compliance with the standard with respect to a land precision of the elevator car usable. A service technician, who checks the elevator installation and the proper function within the usual service intervals, then no longer has to check the accuracy of the landing himself and can instead resort to data regarding the accuracy of the land taken up by the elevator control device during operation. Using such data, it is easy to determine whether the landing accuracy achieved during operation has been maintained at the tolerance specified by the standard. Such data can also be called up by a service technician, without having to travel to the location of the respective elevator installation, so that compliance with the country accuracy can also be checked by "remote monitoring" (e-inspection).

Advantageous embodiments of the invention are the subject of the dependent claims. Here used backlinks indicate the further development of the subject matter of the main claim by the features of the respective subclaim. They should not be construed as a waiver of obtaining independent, objective protection for the feature combinations of the dependent claims. Furthermore, with a view to an interpretation of the claims in a closer specification of a feature in a subordinate claim, it is to be assumed that such a restriction does not exist in the respective preceding claims.

In a particular embodiment of the method outlined above, a derivative value determined on the basis of the respective overall error is used for each floor of a building. This allows the consideration of dynamic influences on the movement of the elevator car in the elevator car shaft. By way of example, it can be pointed out that it can be assumed that the free length of the suspension cables and a dependent possible dynamic change in length (elongation or shortening) will have an influence on a respective accuracy with which a holding position can be approached. Because these influences are correlated with the free length of the supporting cables and thus with the respective corresponding floor, such influences can be taken into account comparatively easily, if for each floor of the respective Building or at least individual floors of the building for this on the basis of the respective total error determined derivative value, so a floor-specific Vorhaltwert is used.

In a further embodiment of the method, for at least individual floors of a building, that is to say for example not the lowermost floor value and / or not the top floor, at least two predefined values determined on the basis of the respective total error are used. These at least two Vorhaltwerte are a first floor specific Vorhaltwert for an upward drive before the floor stop and a second floor specific Vorhalt value for a downward drive before the floor stop. This allows for consideration of influences which depend, for example, on mass acceleration, mass inertia and gravitation. In general, it can be expected that a floor stop following an uphill ride will result in a different overall error than following a previous descent. By taking into account different Vorhaltwerte depending on the previous direction of travel, the method can be taken into account.

In a particular embodiment of this embodiment of the method, at least four control values determined on the basis of the respective total error are used for at least individual floors. These at least four Vorhaltwerte are a first floor specific Vorhaltwert for an upward drive before the floor stop and an upward drive to the floor stop, a second floor specific Vorhalt value for a down trip before the floor stop and a down trip to the floor stop, a third floor specific Vorhaltwert for an up drive before the floor stop and a downstroke after the floor stop and a fourth floor specific Vorhaltwert for a downward drive before the floor stop and an upward drive to the floor stop. These different retention values take into account for each floor the possible driving situation of the elevator car, that is, in which direction of travel the position of the floor stop is reached and in which direction the journey is continued.

The above-mentioned object is also achieved with an elevator control device, which is set up to carry out the method and individual or all embodiments of the method. The invention is preferably implemented in software. The invention is thus on the one hand also a computer program with by a computer, namely the elevator control device executable program code instructions and a storage medium with such a computer program, so a computer program product with program code means, and finally an elevator control device, in the memory as means for carrying out the method and its Embodiments such a computer program is loaded or loadable. The method described here and below is carried out automatically by the elevator control device in that the elevator control device controls the elevator car so that it moves to individual floors in a building and thereby at a predetermined stop position each executes a floor stop. In connection with a floor stop, a total error in the form of a deviation of an actual position of the elevator car and a position of the elevator car assumed as an actual position is determined. Based on the total error, a derivative value is determined. This is taken into account in a comparison made by the elevator control device for starting the respective holding position comparison of actual position and holding position in addition to the actual or the holding position.

Unless explicitly stated otherwise in the text, each method step described should be read such that it is automatically executed by the elevator control device on the basis of and under the control of a respective control program executed therefrom.

An embodiment of the invention will be explained in more detail with reference to the drawing. Corresponding objects or elements are provided in all figures with the same reference numerals.

The or each embodiment is not to be understood as limiting the invention. Rather, in the context of the present disclosure, modifications and modifications are possible, for example, by combination or modification of individual in conjunction with the described in the general or specific description part and in the claims and / or drawings features or elements or method steps for the Skilled in terms of solving the problem are removable and lead by combinable features to a new subject or to new process steps or process steps.

Fig. 1

eine Aufzugsanlage mit einer Aufzugssteuerungseinrichtung mit einer Aufzugskabine,

Fig. 2

einen Komparator,

Fig. 3

einen zeitlichen Verlauf von eine Bewegung der Aufzugskabine beschreibenden Werten,

Fig. 4

einen Komparator wie in Fig. 2 mit einem vorgeschalteten Addierer und

Fig. 5

bis

Fig. 7

schematisch vereinfachte Darstellungen von sogenannten Look-Up-Tabellen.

Show it

Fig. 1

an elevator installation with an elevator control device with an elevator car,

Fig. 2

a comparator,

Fig. 3

a time course of values describing a movement of the elevator car,

Fig. 4

a comparator like in Fig. 2 with an upstream adder and

Fig. 5

to

Fig. 7

schematically simplified representations of so-called look-up tables.

The representation in FIG. 1 schematically shows a simplified elevator system 10 in a building, not shown itself with at least one in at least one elevator car shaft 12 movable elevator car 14 and provided at a central point of the building elevator control device 16. The elevator control device 16 is in a conventional manner for controlling the elevator system 10 provided. For this purpose, the elevator control device 16 comprises a processing unit 17 in the form of or in the manner of a microprocessor and in a memory, not shown, a control program 18 which determines the functionality of the elevator control device 16.

The or each elevator car 14 is movable in a manner known per se in the elevator car shaft 12 or a respective elevator car shaft 12, so that different floors 20 of the building can be reached. For this purpose, the elevator control device 16 controls, in a generally known manner, a drive 22 in the form of an electric motor, usually in the form of a combination of an electric motor and an inverter. Not shown are the following nonetheless existing elements: car doors of the elevator car 14, storey doors on each floor 20, controls in the elevator car 14 for a car call and controls on the individual floors 20 for a landing call. Likewise not shown, but of course also present, are wired or wireless connections between the individual units of the elevator installation 10 for the transmission of signals, data and electrical energy.

The mentioned car or floor calls are processed by the elevator control device 16 in a manner known per se and, for example, a movement of the elevator car 14 results from a first floor 20 to a second floor 20. For such a movement, the elevator control device 16 controls the drive 22 accordingly and the movement ends when the elevator car reaches a holding position known with respect to the respective destination floor. Such hold positions are expressed in terms of numerical values, and because they result, for example, from a fixed position of a lower edge of a respective floor door, are given to the elevator controller 16 as constant values.

When the elevator car is moved by means of the elevator control device 16 and due to activation of the drive 22 by the elevator control device 16, in simple terms, it is checked whether a destination position belonging to the respective floor or car call, ie the holding position ("landing position") of that floor 20 reached with the floor or car call. For this purpose, continuously or at equidistant points in time - both briefly referred to below as continuous - the respective Hold position compared with a hereinafter referred to as the actual position of the elevator car 14 or short as an actual position position information, which retrieves the elevator control device, for example, the drive 22 or due to data provided by the drive 22, itself forms.

The representation in FIG. 2 shows a known per se comparator 24 with two inputs 26, 27 for comparing the input signals supplied there and for generating an output signal 28 depending on the result of the comparison. The comparator 24 is acted upon at its first input 26 with the respective actual position and at its second input 27 with the respective holding position. The comparator 24 compares the values supplied to the two inputs 26, 27 and, if equal or sufficiently equal, produces an output signal 28 which can be used, for example, to stop the drive 22 under the control of the elevator control device 16. Of course, the illustration is in FIG. 2 only one example and the comparison of the respective actual position with the stop position can be carried out as well with a comparator implemented in software as functionality in the control program 18 respectively executed by the elevator control device 16.

Such a comparison of the respective actual position with the respective holding position is based on ideal conditions, which are not always given in practice. This will be explained by the following FIG. 3 explained.

The representation in FIG. 3 shows two curves 30, 32, namely a first curve 30 and a second curve 32, for moving an elevator car 14 before and after a floor stop. The first curve 30 represents the actual position of the elevator car 14 and will be referred to hereafter. The second curve 32 represents a position of the elevator car 14 assumed on the basis of drive data, in particular converter data. The position of the elevator car 14 assumed on the basis of the drive data is the already mentioned actual position, since only this position is known to the elevator control device 16 and is accordingly transmitted by the elevator control device 16 assumed as actual position.

For each floor 20, a position indicator designated in the technical terminology as a floor flag is provided, which defines the holding position provided for the respective floor 20. Such a position indicator is, for example, a forked light barrier, which cooperates with a switching lug which dips into the slot of the forked light barrier, as described in US Pat EP 0 483 560 B is described. The measuring range recorded by the position indicator is shown in FIG. 3 is referred to as "P" in the interest of easy readability and is also referred to as position indicator P in the following.

In the illustration in FIG. 3 If the abscissa on which the time t has been removed coincides with the holding position. Above the abscissa / holding position, actual or assumed positions of the elevator car 14 with the curves 30, 32 are removed before the floor stop. Below the abscissa / holding position, positions are removed according to the floor holdings.

When the elevator car 14 approaches the intended stop position, it reaches the position indicator P at a certain point in time. Here, the elevator control device 16 has the possibility of correcting the actual position 32 of the elevator car 14 assumed on the basis of the drive data, since the location of the position indicator P is known , At the in FIG. 3 By way of example, this occurs before the floor stop, for example at the position marked "A" and after the floor stop at the position marked "B".

The floor stop also takes place after such a correction on the basis of the assumed based on the drive data and possibly corrected actual position. Nevertheless, due to a comparison of in FIG. 2 described actual holding position differ from the respective holding position provided and in FIG. 3 this is shown as a positioning error "F". In connection with the floor stop usually results in a change in the total weight of the elevator car 14 by increasing or decreasing people and / or due to loaded or unloaded items. This change in the total weight of the elevator car 14, referred to below as a charge change, likewise influences the actual holding position of the elevator car 14 relative to the intended holding position. This is in the illustration in FIG. 3 drawn as charge change "L". If the elevator car 14 starts moving again after the floor stop and the position indicator P or at least one edge of the position indicator P happens again, there is again a possibility to correct the actual position assumed on the basis of the drive data, namely the known position of the position indicator P. Correction is shown in the illustration in FIG. 3 marked as total error "G".

Quantitatively detectable in connection with a floor stop only the total error G and a possible change of the cabin weight. The respective total error recorded should be used for statistical evaluations of the country accuracy of the elevator car 14. The statistical evaluation can be based on the last journey, the last x journeys, for example the last ten journeys, the journeys on the current day, the journeys on the last day, the journeys in the current or previous week, in the current or previous month, etc . Respectively. The landing accuracy is the accuracy with which the elevator car 14 reaches the stop position / landing position at the floor stop. Additionally or alternatively, due to the respectively detected total error G and the likewise known change in the cabin weight attempts are made to achieve the intended holding position as accurately as possible during a next start-up of the same floor 20 and to minimize the positioning error F.

If, for simple conditions, it is initially assumed that the cabin weight does not change in the case of a floor stop, the total error G on leaving the position indicator P can be taken as a measure of the positioning error F at the previous floor stop. The elevator control device 16 can therefore take into account, in addition to the actual position assumed on the basis of the drive data, a derivative value formed from the total error G.

For this purpose, the illustration in FIG FIG. 4 refer, which like the representation in FIG. 2 a Komaparator 24 which, in case of sufficient equality of the respective quantities supplied generates an output signal 28 which can be used to stop the drive 22. In contrast to the representation in FIG. 2 the comparator 24 is preceded by an adder 34. The adder 34 comprises a first input 26 and a second input 35. At the first input 26, the adder 34 is acted upon by the respective actual position of the elevator car 14 and at the second input 35 by the derivative value formed on the basis of the total error G. The comparator 24 itself is acted upon by the sum thus formed and the holding position supplied to its second input 27. The output signal 28 is thus generated when the sum of the respective actual position and the respective preset value coincides with the holding position or sufficiently coincides. Again, it goes without saying that the representation in FIG. 4 is of course only an example and the comparison can be carried out in the same way with a comparator implemented in software.

Whether in practice a sum or a difference is formed from the actual position and the reserve value depends on the type of formation of the reserve value and on the respective direction of travel of the elevator car 14. In addition, the derivative value can also be taken into account in the form of a sum or a difference with the holding position.

Coming back to the in FIG. 3 represented situation means that upon leaving the position indicator P resulting total error G that the elevator car 14 has actually "continued to drive", as was assumed by the elevator control device 16 due to the respective actual position. To compensate for this, in brief, the elevator car 14 must hold "earlier" on this floor 20 at the next stop so that, in the event of repeating the mispositioning that led to the previously determined total error G, the earlier stop compensates for the misalignment which is never completely avoidable or at least partially compensated. This is achieved in that, when starting the respective holding position in a comparison of actual position and holding position carried out by the elevator control device 16 in addition to the actual or to the holding position the Vorhaltwert is taken into account, for example, as with the in FIG. 4 shown circuitry of the comparator 24 or a corresponding implementation in software is possible.

Practical experiments with the approach described so far have shown that 20 different total errors G result for different floors. A specific embodiment of the method described so far provides that, instead of a derivative value determined on the basis of a total error G, respective floor-specific reserve values are formed on the basis of floor-specific, determined total errors G. The processing of such floor-specific Vorhaltwerte corresponds for each floor 20 of the processing already described. It is thus considered when starting the respective holding position in a running of the elevator control device 16 Comparison of actual position and holding position in addition to the actual or the holding position of the floor-specific Vorhaltwert.

The selection of the floor-specific derivative value to be used in each case can be carried out by means of a so-called look-up table 40 (look-up table, LUT), as shown in FIG FIG. 5 is shown by way of example. The look-up table 40 comprises a number of fields 42 corresponding to the number of floors 20 in the respective building. Each field 42 comprises a floor-specific derivative value, which in the illustration in FIG FIG. 5 symbolically as VH_1, VH_2, VH_3 and VH_n are drawn. When approaching a particular floor 20 due to a car or floor call can then be accessed by means of the elevator control device 16 with a number of each floor 20 on the look-up table 40 and there the number of the respective floor 20 corresponding field 42. In this way, the Vorhaltwert specific for the approaching floor 20 is available and the further use of the so-called floor-specific Vorhaltwerts takes place as explained above.

In this case, it is also specifically contemplated that a look-up table 40, which is used anyway by the elevator control device 16 for managing the floor-specific holding position, is supplemented such that this look-up table 40 comprises both the floor-specific preset values and the floor-specific holding positions. In the illustration in FIG. 5 these are symbolically drawn as HP_1, HP_2, HP_3 and HP_n, whereby the basic optionality is indicated by square brackets.

Practical experiments with the approach described so far have also shown that the resulting total error G in addition to the respectively approached floor is also dependent on the respective direction of travel of the elevator car 14 and that can be further improved by driving direction-dependent Vorhaltwerte the accuracy in reaching the respective holding position. With a corresponding supplement of the procedure belong to each direction of travel determined total errors G thereof each formed direction-dependent and floor-specific Vorhaltwerte, which in the illustration in FIG. 6 in a suitably supplemented look-up table 40 are shown symbolically as HP_1u, HP_1d, HP_2u, HP_1d, ... HP_nu, HP_nd. In this case, each field 42 effectively comprises its own, small look-up table, and the value stored in its fields is used by the elevator control device 16 as a travel-direction-dependent and story-specific derivative value in the manner described above. The respective direction of travel is symbolically designated for easy distinction with "u" (up) and "d" (down).

Further practical experiments with the approach described so far have shown that the resulting total error next to each approached floor 20 and the respective direction of travel of the elevator car when starting the floor 20 also depends on the direction in which the ride is continued following the floor stop and that the accuracy in achieving the respective holding position can be improved even further by additionally providing provision values in this regard. The so far specific Vorhaltwerte can also be comparatively easy to organize in a look-up table 40 and are held accordingly there for the elevator control device 16 retrievable.

The representation in FIG. 7 shows a corresponding look-up table 40. Their fields 42 include its own small look-up table for the direction of travel and these fields in turn each have their own small look-up table 40 for the direction in which the ride following continues to the floor stop. The resulting lead values are in FIG. 7 drawn according to the scheme already used. If one of the symbolically entered values is picked out by way of example, "VH_2ud" stands for the reserve value for a floor stop on the second floor 20 of the building in an upward drive in the direction of the stop position and a downward drive following the floor stop.

All preceding explanations with respect to the acquisition of specific lead values and their detection, for example in a look-up table, also apply correspondingly to a floor-specific and / or direction-specific detection of the total errors G underlying the lead values and generation of service signals by the elevator control unit 16 their basis. If at least such a detection of the total error G takes place, a service technician can access the service signals generated for this, or the total errors G detected themselves or statistical evaluations already initiated by the elevator control device 16, also in the form of a remote access (remote monitoring / e-service). inspection). Then, for example, it can be determined if there is a violation of landing accuracy, for example given certain floors or certain directions, so that it can derive information for the maintenance of the elevator system.

wobei M für die Masse und A für die Beschleunigung der Aufzugkabine 14, C als Materialkonstante für die Elastizität des Tragseils oder der Tragseile und L für die Länge des Tragseils zwischen dem Antrieb 22 und der Aufzugkabine 14 stehen, die mit E bezeichnete Längenänderung (Längung oder Kürzung) des Tragseils oder der Tragseile - im Folgenden ohne Verzicht auf eine weitergehende Allgemeingültigkeit einzeln und zusammen als Tragseil bezeichnet - berechnet werden. Die Ergebnisse einer solchen Berechnung können stockwerkspezifisch für die zugehörigen Werte des Parametes L in eine Look-Up-Tabelle eingetragen werden. Darüber hinaus können für ein oder mehrere unterschiedliche Werte für den Parameter M die zugehörigen Werte für die Längenänderung des Tragseils ebenfalls vorab berechnet und in die Look-Up-Tabelle eingetragen werden. Die stockwerkspezifischen Werte für die Längenänderung des Tragseils können anhand des jeweils durch den Kabinen- oder Stockwerksruf ausgewählten Zielstockwerks aus der Look-Up-Tabelle abgerufen werden. Die massenspezifischen Werte für die Längenänderung des Tragseils können stockwerksspezifisch aus der Look-Up-Tabelle abgerufen werden, indem die jeweilige Masse der Aufzugskabine erfasst und damit eine Interpolation der aus der Look-Up-Tabelle abrufbaren Werte für die Längenänderung des Tragseils erfolgt.Because the suspension cables holding the elevator car 14 are resilient in their material properties, a resultant positioning error F (FIG. Fig. 3 ) partly due to this elasticity. This too can also be compensated by means of a look-up table (not shown). This is based on the assumption that upon passing the position indicator P it can be assumed that the acceleration of the elevator car 14 is constant and corresponding to the jerk is equal to zero. Furthermore, it is assumed that the speed and acceleration of the drive 22 and the resulting speed or acceleration of the elevator car 14 are identical. Then, with a comparatively simple equation of motion, viz $$\mathrm{M}\times \mathrm{A}=\mathrm{C}\times \mathrm{L}\times \mathrm{E\; or\; E}=\left(\mathrm{M}\times \mathrm{A}\right)/\left(\mathrm{C}\times \mathrm{L}\right).$$

where M stands for the mass and A for the acceleration of the elevator car 14, C as a material constant for the elasticity of the supporting cable or ropes and L for the length of the supporting cable between the drive 22 and the elevator car 14, the change in length (elongation or Shortening) of the supporting cable or the suspension cables - hereinafter individually and collectively referred to as suspension cable without waiving any further generality. The results of such a calculation can be entered floor-specifically for the associated values of the parameter L in a look-up table. In addition, for one or more different values for the parameter M, the associated values for the length change of the suspension rope can also be calculated in advance and entered into the look-up table. The loft-specific values for the length of the suspension rope can be retrieved from the look-up table based on the destination floor selected by the cabin or landing call. The mass-specific values for the change in length of the support cable can be retrieved floor-specific from the look-up table by the respective mass of the elevator car detected and thus interpolation of the retrievable from the look-up table values for the change in length of the support cable.

The floor-specific or floor-specific and mass-specific available values for an expected change in length of the support rope are, if these values are available, taken into account in the determination of the respective Vorhaltwerts, for example by subtracting from the Vorhaltwert the value for the expected change in length of the support rope.

The above assumption of a constant acceleration of the elevator car 14 when passing the position indicator P is in the case of the respective elevator control device 16 in the process the elevator car 14 used between the floors 20 movement profiles for a so-called "position trip" (motion profiles as in the WO 2012/032020 A described) are usually justified. Such motion profiles are characterized by the fact that the acceleration first increases, then constant, and finally approaches zero when the rated speed is reached. Such motion profiles can be specified in a manner known per se to the inverter controlled by the respective elevator control device 16 or be stored in the converter itself. In such a movement profile, the force acting on the supporting cable and the resulting change in length can be determined particularly easily, without the need to know the dynamic behavior of the supporting cable in detail. In principle, a determination of the respective change in length is also possible on the basis of a non-constant acceleration.

Because in practice the car rides are carried out with different payloads of the elevator car 14, the respective total error G (FIG. Fig. 3 ) also from the charge and above all a charge change. In the case of different trips to the same floor 20, consequently, depending on the charge and the change in charge, different total errors G result and, depending thereon, different default values. This is taken into account by means of a determination of a statistic either with respect to the respectively determined total errors G or the derivative values based thereon.

As a result, from a plurality for a floor 20 or a floor 20 and a direction of travel or a floor 20 and a direction of travel before and after the floor stop, an average value of the total errors G is taken into account and from this the lead value can be determined. For example, it is contemplated that the elevator control device 16 manages for each Vorhaltwert a so-called FIFO memory or the like, in which a fixed number of total errors G, for example eight total errors, but at least always the current total error is stored, and that the mean value is formed on the content of such a memory and the derivative value is formed on the basis of this average value.

It can also be provided that only such total errors G are taken into the memory and taken into account in the formation of a Vorhaltwerts that meet a predetermined or predetermined condition, for example such that the amount of the total error G is smaller than a predetermined or predefinable threshold must be, so that the total error G can be considered in the determination of a Vorhaltwerts. As a threshold value, for example, the standard deviation of total error G previously recorded is considered.

• kodiert, ob die aktuelle Fahrt mit einem Gesamtfehler G innerhalb des durch den jeweiligen Schwellwert definierten Toleranzbereichs abgeschlossen wurde, ob sich also anhand des beim Stockwerkhalt ermittelten Gesamtfehlers G beim Verlassen des Stockwerks ergibt, dass bei dem vorangehenden Stockwerkhalt die Landegenauigkeit in der von der Norm gegeben Toleranz geblieben ist,
• die Anzahl der Fahrten, die mit einem Gesamtfehler G innerhalb des durch den jeweiligen Schwellwert definierten Toleranzbereichs abgeschlossen wurden, kodiert,
• die Anzahl der Fahrten, die mit einem Gesamtfehler G außerhalb des durch den jeweiligen Schwellwert definierten Toleranzbereichs abgeschlossen wurden, kodiert,
• einen Mittelwert der Gesamtfehler G, ggf. einen Mittelwert der stockwerkspezifischen und/oder fahrtrichtungsspezifischen Gesamtfehler G kodiert,
• eine Standardabweichung der Gesamtfehler G, ggf. eine Standardabweichung Mittelwert der stockwerkspezifischen und/oder fahrtrichtungsspezifischen Gesamtfehler G kodiert usw.

On this basis, the elevator control device 16 can also generate information for installation and / or maintenance of the elevator installation 10, for example a service signal which

• encodes whether the current trip was completed with a total error G within the tolerance range defined by the respective threshold value, ie whether the ground level accuracy given in the previous floor holdings is given on the basis of the overall error G determined on the floor stop when leaving the floor Tolerance has remained,
• the number of trips that have been completed with a total error G within the tolerance range defined by the respective threshold value,
• encodes the number of trips that have been completed with a total error G outside the tolerance range defined by the respective threshold value,
• an average of the total errors G, possibly an average value of the floor-specific and / or direction-specific total errors G coded,
• a standard deviation of the total error G, possibly a standard deviation mean of the floor-specific and / or direction-specific total error G encoded, etc.

• Angegeben wird ein Verfahren zum Betrieb einer zur Steuerung und Überwachung der Bewegungen zumindest einer Aufzugskabine 14 vorgesehenen Aufzugssteuerungseinrichtung 16, wobei die Aufzugskabine 14 unter Kontrolle der Aufzugssteuerungseinrichtung 16 einzelne Stockwerke 20 in einem Gebäude anfährt und dabei an einer vorgegebenen Halteposition oder vorgegebenen Haltepositionen jeweils einen Stockwerkhalt ausführt und wobei im Zusammenhang mit dem Stockwerkhalt ein Gesamtfehler G in Form einer Abweichung einer tatsächlichen Position der Aufzugskabine 14 sowie einer als Istposition angenommenen Position der Aufzugskabine 14 ermittelt wird. Der ermittelte Gesamtfehler G beschreibt die jeweilige Landegenauigkeit und kann zur Generierung von Servicesignalen und/oder zur Verbesserung der Landegenauigkeit verwendet werden. Demgemäß erzeugt die Aufzugssteuerungseinrichtung 16 zum Beispiel ein Servicesignal oder Servicesignale anhand eines jeweiligen Gesamtfehlers G oder einer statistischen Erfassung mehrerer Werte für einen Gesamtfehler G. Zusätzlich oder alternativ ermittelt die Aufzugssteuerungseinrichtung 16 anhand des Gesamtfehlers G einen Vorhaltwert, der bei einem von der Aufzugssteuerungseinrichtung 16 zum Anfahren der jeweiligen Halteposition ausgeführten Vergleich von Istposition und Halteposition zusätzlich zur Ist- oder zur Halteposition berücksichtigt wird.

Individual aspects of the description submitted here can be briefly summarized as follows:

• Specified is a method for operating an intended for controlling and monitoring the movements of at least one elevator car 14 elevator control device 16, wherein the elevator car 14 under control of the elevator control device 16 individual floors 20 moves in a building while doing at a predetermined holding position or predetermined holding positions in each case a floor stop and wherein in connection with the floor stop a total error G in the form of a deviation of an actual position of the elevator car 14 and a position of the elevator car 14 assumed as the actual position is determined. The determined total error G describes the respective country accuracy and can be used to generate service signals and / or to improve the accuracy of the land. Accordingly, the elevator control device 16 generates, for example, a service signal or service signals based on a respective total error G or a statistical acquisition of several values for a total error G. Additionally or alternatively, the elevator control device 16 determines a lead value based on the total error G which is at startup by the elevator control device 16 the comparison of actual position and holding position executed in addition to the actual or holding position is taken into account.

Claims (9)

1. A method for operating an elevator control device (16) provided for controlling and monitoring movements of at least one elevator car (14),
   wherein the elevator car (14) approaches individual floors (20) in a building while under control of the elevator control (16) and executes a floor stop respectively in a prescribed stopping position,
   characterized in that: in conjunction with the floor stop, an overall error (G) is determined in the form of a deviation between an actual position of the elevator car (14) and a position of the elevator car (14) that is assumed as a current position; and
   the elevator control device (16) generates service signals on the basis of a statistical acquisition of a plurality of values of the overall error (G).
2. The method according to claim 1, wherein a derivative value is determined on the basis of the overall error (G), and
   wherein the derivative value is taken into account, in addition to the current position or a stopping position during a comparison between the current position and the stopping position performed by the elevator control device (16) on approach to the respective stopping position.
3. The method according to claim 2, wherein a derivative value determined on the basis of the respective overall error (G) is used for each floor (20) of a building.
4. The method according to claim 2, wherein at least two derivative values determined on the basis of the respective overall error (G) are used for at least individual floors (20) of a building, the derivative values namely being:

   a first floor-specific derivative value for upward movement prior to the floor stop, and

   a second floor-specific derivative value for downward movement prior to the floor stop.
5. The method according to claim 4, wherein at least four derivative values determined on the basis of the respective overall error (G) are used for at least individual floors (20) of a building, the derivative values namely being:

   a first floor-specific derivative value for an upward movement prior to the floor stop and an upward movement after the floor stop,

   a second floor-specific derivative value for a downward movement prior to the floor stop and a downward movement after the floor stop,

   a third floor-specific derivative value for an upward movement prior to the floor stop and a downward movement after the floor stop, and

   a fourth floor-specific derivative value for a downward movement prior to the floor stop and an upward movement after the floor stop.
6. The method according to any of claims 2 to 5, wherein the elevator control device (16) reads out the derivative value floor-specifically from a look-up table (40).
7. A control program (18) with program code means, in order to perform all of the steps of the preceding claims, when the control program (18) is executed by an elevator control device (16) by means of a processing unit (17) of the elevator control device (16).
8. A digital storage medium with electronically readable control signals that can interact with an elevator control device so that the method according to any of claims 1 to 6 is executed.
9. An elevator control device (16) having a processing unit (17) and a storage in which the control program (18) according to claim 7 is loaded, the control program being executed during operation of the elevator control device (16) by the processing unit (17) thereof.

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