MOVER FOR A LONG STATOR SYSTEM

Description

[0001] The present invention relates to a mover for a long stator system according to claim 1 and a method for determining a system parameter of a long stator system according to claim 9. State of the art

[0002] Long-stator systems are well known in the art. They consist of an elongated stator (designed, for example, as a guide rail) and one or more carriages, called movers, that can move along the long stator under the influence of magnetic force. In these systems, the movement of the mover along the long stator, and especially in the area of switches, is controlled by adjusting the magnetic forces acting on the mover.

[0003] Although the magnetic fields that determine the magnetic force are usually reliably generated by the coils in the long stator, the magnetic forces acting on the mover also depend on other system parameters that are difficult or impossible to control. A mover and a method according to the preambles of claims 1 and 9 are known from US 2015 / 028699 A1. Task

[0004] The present invention is therefore based on the object of enabling an accurate determination of system parameters of a long stator system in order to improve the accuracy of the control of the movement of the movers. Solution

[0005] This object is achieved by the mover for a long stator system according to claim 1 and the method for determining a system parameter of a long stator system according to claim 9. Advantageous developments of the invention are covered in the subclaims.

[0006] The mover according to the invention for a long stator system comprises a primary part with elements for movably arranging the mover on a long stator and a receiving area in which a sensor for position-dependent measurement of at least one system parameter is arranged, wherein the sensor can be detachably connected to the receiving area.

[0007] The primary part is generally understood to be any structure that is part of the mover and contains the moving elements. Frame structures, for example, can be considered as primary parts, although secondary parts (described later) can also be incorporated into the frames.

[0008] Position-dependent measurement of the system parameter refers to the measurement of the system parameter in such a way that the position of the mover relative to the long stator can be deduced, for example, by storing measurement pairs in the form "position-value of the system parameter." The system parameter can be, for example, a magnetic force acting on the sensor or the distance of the sensor from the long stator along which the mover runs. Other parameters that characterize the system consisting of the long stator and the mover and are particularly relevant for the magnetic force acting on the mover can also be determined using suitable sensors.

[0009] According to the invention, the sensor comprises a load cell which is fixedly connected to the mover, and a secondary element which corresponds in geometry and / or its magnetic force which is interchangeable with the long stator during operation to a secondary part of the mover, wherein the load cell can measure a force acting on the secondary element when the mover moves along the long stator under the influence of magnetic force.

[0010] The secondary part of the mover is the element that is installed as standard in the mover. This is usually a magnet or a magnetizable material that is subjected to the magnetic force generated by the long stator and ultimately causes the mover to propel itself along the long stator. Here, it can also be specifically designed for the secondary part to be identical to the secondary element, with only the load cell replacing the usual suspension / connection of the secondary part to the primary part. In any case, the secondary element is designed to be connected to the load cell.This embodiment allows the measurement of the magnetic forces acting on the mover under conditions that would otherwise occur during normal operation, since the mover as such, in particular the primary part, can be designed like a mover commonly used with the long stator and the installation of the load cell with the secondary element only requires minor changes to the system compared to such a conventional mover.

[0011] In a further development of this embodiment, the position of the load cell relative to the primary part can be adjusted using adjustment elements. Such adjustment elements can be used to compensate for possible tolerance deviations of all components involved, allowing the most ideal geometric position possible and, with regard to the acting forces, ideal position. Adjustment elements can be, for example, washers, screws, spacers, and the like. This allows minor deviations during installation of the load cell to be compensated.

[0012] In a further development of these embodiments, the distance between the mover and the long stator in the distances arranged on the long stator perpendicular to the mover's plane of movement corresponds to the usual distance of the mover with the installed secondary element from the long stator. This also means that the distance of the mover, and in particular the secondary element and the load cell, from the long stator is identical to that of the movers typically used in conjunction with the long stator, so that the magnetic force, which is fundamentally dependent on the distance to the long stator, can be measured very accurately for real-world operation.

[0013] In a further development, the load cell is designed to measure a force acting on the secondary element in both directions perpendicular to the plane of movement of the mover along the long stator. This embodiment is particularly advantageous when measuring system parameters in the area of a switch of the long stator system, since it allows the magnetic force acting on the mover to be precisely measured by the long stator on which the mover initially moves and by the long stator to which the mover is transferred in the area of the switch.

[0014] In an alternative embodiment, the sensor comprises a distance meter for measuring the distance between the mover and the long stator perpendicular to the plane in which the mover can move along the long stator during operation. This allows the size of the air gap between the mover and the long stator to be measured very precisely and any manufacturing or adjustment errors to be detected. In areas where a mover runs at a greater distance from the long stator, for example, the coils of the long stator can be controlled so that the greater distance is compensated for by a stronger magnetic field, thus preventing any loss of speed of the mover.

[0015] In a further development of this embodiment, the distance measuring device comprises one of one or more sensing rollers and / or one or more sensing pins. Sensing rollers allow for precise distance measurement even while the mover is moving along the long stator. Sensing pins, on the other hand, ensure even more precise distance measurement, but are used when the mover is stationary, as otherwise, damage to the long stator could occur if it comes into contact with the sensing pin while the mover is moving along the long stator.

[0016] Furthermore, the mover can be provided with a positioning system configured to determine the position of the mover along the long stator. This allows the precise position of the mover to be assigned to the values measured by the sensor for one or more system parameters. This allows a "map" of the system parameters to be created for later use, depending on the position of the mover on the long stator. For this purpose, an initial position can be defined once or multiple times.

[0017] In a further embodiment, the mover comprises evaluation electronics for processing at least the measured values recorded by the sensor. This allows the system parameters measured by the sensor and / or the associated position to be evaluated in real time, so that such a mover can also be used routinely during operation of the long-stator system to check compliance with the system parameter tolerance. Furthermore, data transmission devices such as wireless connections, which could potentially have a negative impact on the long-stator system, can be eliminated.The method according to the invention for determining a system parameter of a long stator system comprises the use of a mover with a primary part with elements for movably arranging the mover on a long stator and with a receiving area in which a sensor for position-dependent measurement of the system parameter is arranged, wherein the sensor is detachably connected to the receiving area and the mover is arranged on the long stator and the sensor measures at least one system parameter while the mover is arranged on the long stator.

[0018] It can also be provided that the sensor measures the system parameter while the mover is moving along the long stator. This "measuring mover" can thus be used during normal operation of the long stator system without major interruptions.

[0019] According to the invention, the sensor comprises a load cell that is fixedly connected to the mover. The sensor further comprises a secondary element that corresponds to a secondary part of the mover in terms of geometry and / or magnetic force that is interchangeable with the long stator during operation. The load cell measures a force acting on the secondary element when the mover moves along the long stator under the influence of magnetic force. This ensures a precise determination of the changes in the magnetic force along the long stator acting on a mover.

[0020] Alternatively, the sensor can measure the distance between the mover and the long stator using a distance meter perpendicular to the plane in which the mover moves along the long stator. This allows for a reliable determination of the air gap between the mover and the long stator, which can have a significant influence on the magnetic force acting on the mover.

[0021] Furthermore, it can be provided that the values measured by the sensor for the system parameters are processed by the mover's evaluation electronics. This enables real-time evaluation and thus monitoring of the actual operation of the long-stator system.

[0022] Furthermore, it can be provided that the position of the mover is determined during a movement along the long stator using a positioning system. This allows the system parameter to be assigned to the position of the mover relative to a reference point on the long stator. Short description of the characters

[0023] Fig. 1 shows a schematic representation of a long stator system according to an embodiment; Fig. 2 shows a more detailed schematic view of a mover from Fig. 1 according to an embodiment; Fig. 3 is an expression drawing of the Fig. 2 shown movers; Fig. 4 shows a mover according to the invention according to a further embodiment; Fig. 5 shows a section along the AA plane through the mover of the Fig. 4 ; Fig. 6a+b show a mover on a guide rail ( Fig. 6a ) and a mover in the area of a switch ( Fig. 6b ). Detailed description

[0024] Fig. 1shows a schematic representation of an elongated stator system 100, such as can be used in transport systems in the beverage processing industry, for example, for transporting containers such as bottles. The elongated stator system comprises an elongated stator 153, which can be elongated or have a closed geometry. The elongated stator can be delimited above and below by two guide rails 151 and 152. In the embodiment shown here, a free space for the movable arrangement of a mover can be provided between the elongated stator 153 and each of the guide rails 151 and 152.

[0025] In the embodiment shown here, the mover 101 comprises a primary part 112, on which elements 111 are arranged for movably arranging the mover on the elongate stator and / or the guides 151 and 152. These elements 111 can preferably be rotatable rollers that can be fitted into the gap between the elongate stator 153 and the respective guide 151 or 152.

[0026] In addition to the primary part 112, the mover 101 also has a receiving area 113 into which a replaceable sensor and a secondary part of the mover can be inserted. The receiving area 113 can also be provided as a recess in the primary part 112 of the mover. However, it can also be an additional component for receiving the sensor or the secondary part, which can be connected to the primary part via suitable connections such as screws.

[0027] The secondary part is typically a body made of or comprising a magnetizable material or a magnet. This body is used when the mover 101 is used in the operation of the long-stator system to propel the mover along the long stator 153 due to the magnetic field generated by the long stator. The secondary part can comprise one or more magnets. These can be screwed to the primary part or connected to it in some other way.

[0028] Fig. 2 shows a schematic view of a mover 101 according to the invention in one embodiment. This mover also comprises the previously described primary part, in which the receiving area 113 is arranged. The primary part also includes the elements for movably arranging the mover on the elongated stator, represented here by rollers.

[0029] In the illustrated embodiment, a sensor comprising a load cell 213 and a secondary element 212 is arranged in the receiving area 113. The secondary element can be designed essentially in accordance with the secondary part, as in the embodiment according to Fig. 1 This particularly concerns its geometry, weight and magnetic properties, in particular magnetic permeability and susceptibility. According to the invention, the secondary element 212 is connected to the load cell 213 in such a way that a magnetic force acting on the secondary element 212, in particular caused by the long stator of the long stator system in Fig. 1, can be measured by the load cell 213 by applying a force to it. This allows the magnetic force acting on the secondary element to be determined depending on the position of the mover on the long stator. For the position-dependent determination of the magnetic force acting on the mover 101 as an example of a system parameter, the mover can additionally be assigned a position determination system, which is not shown here. The measured values determined by the load cell and the positions determined by the position determination system can be evaluated with the aid of evaluation electronics (for example, provided on the mover or external to it) and used to display the magnetic force as a function of the position on the long stator. Other applications of the measured values for position and magnetic force (or generally a system parameter) are also conceivable.These values can be used to control the movers during normal operation (e.g. for transporting containers).

[0030] Preferably, the sensor or load cell in the case of Fig. 2 , comprise a Wheatstone bridge in which one of the resistors in the voltage divider is force-dependent. Its resistance then changes from a zero position (which may correspond to a value equal to zero of the applied forces) depending on the force transmitted to the resistor by the secondary element 212, which, when the sensor is designed with a load cell as in Fig. 2 represents a measure of the magnetic force acting on the secondary element.

[0031] Fig. 3 shows an exploded view of the mover of the Fig. 2. Here, in particular, the structure of the secondary element and its connection to the load cell 313 outside the receiving area 113 is shown. As shown here, the secondary element can comprise several components. For example, magnetizable elements 314 and 315 can be provided on two sides opposite the load cell 313, the function of which is identical to that of the secondary part (see above). These are, for example, magnetic or magnetizable materials that interact with the magnetic field generated by the long stator and can thus propel the entire mover. These can already be identical in geometry and magnetic properties to those of a secondary part for the mover.

[0032] Additionally, one or more adapters 317 and 319 can be provided, via which the elements 314 and 315 can be connected to the load cell 313. In order to make the outer dimensions of the entire sensor embedded in the receiving area 113 as similar as possible to those of a secondary part for the mover, one or more spacer plates 319 can be provided, so that the volume of the entire sensor can also be adapted to a secondary part to be used for the mover. This can also ensure that, even if different secondary parts are used, which differ, for example, in their width, the sensor used can each have a similar or identical geometry.

[0033] The load cell can be designed as a force gauge or a spring force gauge. However, embodiments using a Wheatstone bridge are preferred, as already described in connection with Fig. 2but also described very generally without specific reference to a load cell. The load cell itself must be connected to the primary part 112 in the receiving area 113. For this purpose, one or more elements, for example screws or spacers or click connections, can be used, which additionally enable precise adjustment of the position of the load cell and thus also of the secondary element. The load cell as such is preferably fixedly connected to the primary part 112 so that it does not move even when a magnetic force is applied by the long stator, which could otherwise lead to a falsification of the measured system parameters, in particular the magnetic force acting on the secondary element.

[0034] In the embodiment shown here, elements 314 and 315 are located on both sides of the load cell. This allows reliable measurement of the magnetic force acting on the entire mover, not just in one direction, and thus enables the mover to be used to measure system parameters, in particular the magnetic force acting on it, even in the area of switches where long stators generate a magnetic field on two opposite sides of the mover. However, this configuration of the sensor, in particular its secondary element, is not mandatory. For example, only one magnetizable element 314 can be arranged on one side of the load cell if measurement of the system parameters on only this side is desired.

[0035] Fig. 4shows a further embodiment of the mover 101. The external structure, in particular the primary part 112 and the elements for movably arranging the mover on a long stator 111, can be provided identically to the previous embodiments. Since a significant advantage of the invention lies in only exchanging the workpieces in the receiving area 113 in order to be able to use the mover not only for its usual use in the long stator but also for measuring system parameters of the long stator system, the receiving area 113 is also preferably identical to the previous embodiments.

[0036] In contrast to the Fig. 2 and 3 The embodiment described is shown in the Fig. 4The sensor is designed as a distance meter for measuring the distance between the mover and the long stator at least perpendicular to the plane in which the mover can move along the long stator during operation. For this purpose, the distance meter can comprise, for example, one or more sensing rollers 431. These are arranged in the receiving area 113 and touch at least a part of the long stator housing when the mover is arranged on the long stator. This is described in more detail in the Fig. 6a and 6b described.

[0037] In addition to the distance meter 431, one or more magnets 440 can be arranged in the receiving area 113, either as part of the sensor or additionally, so that the mover can be moved along the long stator by applying a magnetic field to the long stator. Preferably, the sensor can use the distance meter to measure the distance to the long stator during movement. Embodiments that provide rollable elements as part of the distance meter, such as sensing rollers, are particularly suitable for this purpose. Alternatively, the distance meter can also be designed such that it can only determine the distance to the long stator when the mover is stationary. In this case, styli can be used, in particular.

[0038] If the distance between the mover and the long stator is to be determined while in motion, the preferred embodiment is one in which additional magnets 440 are arranged in the receiving area 113, as this enables a controlled movement of the mover. If the distance is to be determined only when the mover is stationary, such magnets 440 do not necessarily have to be provided, as manual positioning of the mover is also possible. However, magnets 440 can also be provided in this embodiment, since then, regardless of the design of the distance meter, movement of the mover to specific positions is possible with the aid of a traveling magnetic wave along the long stator, and the magnetic force directed perpendicular to the direction of movement can ensure that the mover rests against the long stator.

[0039] Schematically, the Fig. 4Evaluation electronics 420 are also shown as part of the mover. This can comprise a storage medium, in particular a non-volatile memory, and additionally a processor unit that is connected to the sensor and any provided positioning system for the purpose of data exchange. An evaluation of the measured system parameters can thus be carried out directly in the mover. This evaluation can subsequently be read out and / or evaluated, for example, after the end of the entire measuring process, by connecting the evaluation electronics to a computer for data exchange (wirelessly via WLAN or via USB, for example) and transmitting the measured data to the computer, on which further evaluations of the data can then be carried out.

[0040] If, in addition or as an alternative, a connection for data exchange with a central control device is provided during the measurement process of the system parameters with the mover, real-time monitoring of the system parameters measured by the mover or sensor can be carried out depending on the position of the mover relative to the long stator. This allows the mover, for example, to be used with the sensor during operation and to be moved along the long stator in addition to movers equipped with a conventional secondary part, allowing the system parameters to be continuously recorded.

[0041] The Fig. 5 shows a section across the AA plane of the Fig. 4shown mover, i.e. along the center line of the mover. As can be seen, the sensor here comprises four distance meters 550 to 580. In one embodiment, each of these distance meters comprises a contact surface, for example a touch roller 431 shown here, with which the surface of the elongate stator can be touched. This touch roller 431 is preloaded against the surface of the elongate stator housing by a spring element 533, so that the touch element always touches the elongate stator. Furthermore, an adjusting element 532 can be provided for adjusting the preload by the spring element. This can be a screw, for example, around which the spring is partially wound, and depending on the rotational position of the screw, the preload of the spring can be increased or decreased.

[0042] In the Fig. 5In the embodiment shown, the mover 101 comprises two distance meters 550 and 560, which point to the left side in the figure and can measure the distance to the long stator in this direction. The remaining distance meters 570 and 580 can measure the distance to a guide located on the other side or to a stator or long stator located on the other side. The distance can be determined directly, for example, via a Wheatstone bridge, as already described above, and transmitted to a suitable control unit. For this purpose, in this embodiment, one of the resistors in the voltage divider of the Wheatstone bridge is provided such that its resistance value changes depending on the distance of the mover from the long stator, starting from a defined zero position.

[0043] However, other embodiments are also conceivable, particularly with the aid of an electronic measuring tape. In principle, distance measurement, with a suitable zero point of the distance directly on the surface bordering the surface of the mover, allows the size of the air gap between the long stator and the mover to be determined. This value is particularly relevant for drawing conclusions about the magnetic forces acting at this distance, which ultimately determine the movement of the mover.

[0044] While the embodiment shown here describes sensing rollers 431, sensing pins can also be used instead. The spring elements 533 can be designed as mechanical springs. However, other embodiments with flexible elements are also conceivable.

[0045] Fig. 6ashows a cross-section through a long stator and a mover moving on it along a plane perpendicular to the direction of movement of the mover. The mover 101 is analogous to the one in Fig. 4 and Fig. 5 described mover. In this embodiment, the distance measuring devices used are sensing rollers and the Fig. 5 The additional elements described above, such as spring elements, are used. As can be seen, the sensing rollers run along two points on the long stator, which allows the precise determination of the distance from the outer plane defined by the long stator, which points in the direction of the mover. Furthermore, any angle subtended by the long stator and mover can be determined in this way, allowing conclusions to be drawn about any misalignment of the long stator relative to the described guides along which the mover runs.

[0046] The mover runs along guides 151 and 152, which extend above and below the elongate stator, respectively, with the rollers 111 resting against them. In addition to determining the size of the air gap between the elongate stator and the mover, particularly the secondary part, on which the magnetic fields generated by the elongate stator ultimately act to propel the mover, this also allows for checking the relative alignment of the components of the elongate stator system to one another.

[0047] The Fig. 6a The embodiment shown can be used not only with the distance meter as a sensor, but also with the Fig. 2 and Fig. 3 described embodiments of the mover with a load cell and a suitable secondary element for determining the magnetic forces acting on the secondary element, which allows conclusions to be drawn about the forces acting on a mover with a conventional secondary part.

[0048] Fig. 6b shows a further embodiment in which the mover runs between two long stators 153 and 663. This situation usually occurs in the area of switches, with the help of which the direction of movement of the mover can be changed, or a splitting of a first transport path into different transport paths can be realized. Each of the long stators 153 and 663 is assigned corresponding guides 151 and 661 or 152 and 662 above and below, respectively, on which the rollers 111 of the mover can engage. In the Fig. 6b In the illustrated embodiment, for example, the mover can be Fig. 5can be used, which has four distance measuring sensors in the receiving area. In the area of the switch, such a mover makes it possible to simultaneously measure the distance to both long stators 153 and 663 to determine the size of the air gap. In addition, deviations in the alignment of the long stators or guides relative to each other can be determined.

[0049] For the above embodiments using distance meters, it is advantageous if a defined zero position of the distance meters can be determined. This can be achieved, for example, by placing the mover on a horizontal, as flat as possible plate, so that this plate touches the area of the mover, which is also as flat as possible, in which the distance meters, in particular the sensing rollers, are arranged. The sensing rollers are then moved by the spring elements (see Fig. 5) are pre-tensioned against this surface. They therefore inevitably touch it and the setting of the distance meter in this position can then be defined as the zero position. To prevent the mover from being pushed away from the plate by the pre-tension of the spring elements (against gravity), a slight contact force can be exerted on the mover as a whole in the direction of the flat surface from the opposite side of the mover. This contact force can be selected to be just large enough to compensate as completely as possible for the pre-tension of the spring elements, which tends to push the mover away from the flat plate on which it rests and which is already partially compensated for by the weight of the mover resting on the flat plate and whose weight acts in the direction of the flat plate.

[0050] For embodiments according to the Fig. 2 and 3In applications where the sensor essentially measures the magnetic force between the long stator and the mover or its secondary part, it is also necessary to determine a zero position. This is particularly important because, when using the load cell, slight displacements of the secondary element can occur when subjected to magnetic force, changing the size of the air gap between the long stator and the mover, which ultimately also affects the magnetic force acting on the secondary element and thus measured. Calibration or compensation can be performed here to obtain a realistic result for the measured magnetic force.

[0051] First, a standard mover can be used, in whose receiving area the commonly used secondary part is mounted, which cannot move relative to the mover. This can be achieved, for example, by firmly screwing the secondary part to the primary part in the receiving area. The standard mover constructed in this way can then be placed on a force-operated traction machine so that the secondaries point upwards or downwards. A ferromagnetic steel plate is fixed to the movable end of the traction machine, and at a large distance between this plate and the secondaries or the standard shuttle, the force of the traction machine is set to zero. The movable part of the traction machine can then move with the ferromagnetic steel plate towards the standard mover. At distances of a few millimeters, which are realistic for measuring the magnetic force, the geometric distance between the steel plate and the secondary part can now be measured step by step.This can be done, for example, with styli, such as those additionally used in a mover according to the embodiments of the . Fig. 4 and 5 Since the secondary parts are made of magnetic material, a force is exerted when the ferromagnetic steel plate approaches, which can then be recorded and stored along with the distance, for example, in an electronic evaluation device.

[0052] The standard mover is then replaced with a mover with a load cell and a corresponding secondary element. Alternatively, the same primary part can be used, but the secondary parts are replaced with the load cell and the secondary element, or more generally, with the sensor. The steel plate is then moved toward the mover according to the force profile previously determined for the standard shuttle, and the force values obtained at the corresponding distances are stored. By subsequently subtracting the values determined for the standard shuttle and the values determined for the mover with the sensor, a compensation function can be derived with which the fundamentally unavoidable movement of the secondary element relative to the mover when magnetic force is applied can be compensated.

[0053] When operating the mover with the sensor to determine the magnetic force, the compensation function can then be subtracted from the measured values in order to obtain realistic values for the magnetic force actually acting on the mover, which improves the accuracy of the determined magnetic force.

Claims

1. A mover (101) for a long-stator system (100), comprising a primary part (112) with elements (111) for movably arranging the mover on a long-stator (153) and an accommodating area (113), in which a sensor for position-dependent measurement of at least one system parameter is arranged, the sensor being releasably connected to the accommodating area, characterized in that the sensor comprises a load cell (213), which is connected to the mover in a stationary manner, and a secondary element (212) corresponding to a secondary part of the mover as regards its geometry and / or a magnetic force exchangeable with the long-stator during operation, wherein the load cell (213) is able to measure a force acting on the secondary element (212) when the mover (101) moves along the long-stator (153) under the influence of a magnetic force.

2. The mover (101) according to claim 1, wherein the position of the load cell (213) relative to the primary part (112) can be adjusted by means of adjustment elements.

3. The mover (101) according to claim 1 or 2, wherein, in a condition in which the mover (101) is arranged on the long-stator (153), the distance between the mover (101) and the long-stator (153) perpendicular to the plane of movement of the mover (101) along the long-stator (153) corresponds to a nominal distance between the mover (101) with the installed secondary part and the long-stator (153).

4. The mover (101) according to one of the claims 1 to 3, wherein the load cell (213) is configured for measuring, in both directions perpendicular to the plane of movement of the mover (101) along the long-stator (153), a force acting on the secondary element (212).

5. The mover (101) according to claim 1, wherein the sensor comprises a distance meter for measuring the distance between the mover (101) and the long-stator (153) perpendicular to the plane, in which the mover (101) can move along the long-stator (153) during operation.

6. The mover (101) according to claim 5, wherein the distance meter comprises one of: - one or a plurality of sensing rollers and / or - one or a plurality of sensing pins.

7. The mover according to one of the claims 1 to 6, wherein the mover (101) comprises a position determination system, which is configured for determining a position of the mover (101) along the long-stator (153).

8. The mover according to one of the claims 1 to 7, further comprising an evaluation electronics for processing at least the measurement values recorded by the sensor.

9. A method for determining a system parameter of a long-stator system (100), wherein a mover (101) comprising a primary part (112) with elements for movably arranging the mover (101) on a long-stator (153) and an accommodating area (113), in which a sensor for position-dependent measurement of the system parameter is arranged, wherein the sensor is releasably connected to the accommodating area (113), is arranged on the long-stator (153) and the sensor measures at least one system parameter while the mover (101) is arranged on the long-stator, characterized in that the sensor comprises a load cell (213), which is connected to the mover (101) in a stationary manner, and a secondary element (212) corresponding to a secondary part of the mover (101) as regards its geometry and / or a magnetic force exchangeable with the long-stator (153) during operation, wherein the load cell (213) measures a force acting on the secondary element (212) when the mover (101) moves along the long-stator (153) under the influence of a magnetic force.

10. The method according to claim 9, wherein the sensor measures the system parameter while the mover (101) is moving along the long-stator (153).

11. The method according to claim 9 or 10, wherein the sensor measures the distance between the mover (101) and the long-stator (153) by means of a distance meter for measuring the distance between the mover (101) and the long-stator (153) perpendicular to the plane in which the mover (101) moves along the long-stator (153).

12. The method according to one of the claims 9 to 11, wherein the values for the system parameter measured by the sensor are processed by means of an evaluation electronics of the mover (101).

13. The method according to one of the claims 9 to 12, wherein the position of the mover (101) during a movement along the long-stator (153) is determined by means of a position determination system.