Sensor system for an elevator installation

Abstract

The invention relates to a sensor system (1) for position detection of a car (101) of an elevator installation (100) movable along an elevator shaft (102), comprising a measuring strip (2) of ferromagnetic material vertically arrangeable in the elevator shaft (102) and extending along a longitudinal direction (L) in the installed state, the measuring strip (2) having a position coding (3) consisting of material changes, and a sensor unit (4) arrangeable on the car (101) for detecting magnetic flux lines, wherein the sensor unit (4) has magnetic field generating means (6) for generating a magnetic field, wherein the magnetic field generating means (6) are arranged on the side, preferably on both sides, of the measuring strip (2) in a cross-sectional view of the measuring strip in the installed state.

Description

Technical Field

[0001] The present invention relates to a sensor system for detecting the position of an elevator car that can move along the shaft of an elevator, and an elevator device having the sensor system according to the present invention. Background Technology

[0002] As is generally known in the prior art, in order to detect the position of a car that can move between landings in an operating shaft, a measuring strip extending vertically along the operating shaft is read. The measuring strip, firmly arranged and thus fixed in the operating shaft, includes a position code that can be read by a sensor unit arranged on the car and thus movable for position determination.

[0003] In this regard, a sensor system for position detection of a movable elevator car along a shaft is known from EP3736540A1. The known sensor system includes: a measuring strip made of ferromagnetic material, a magnetic field generating device for segmentally and temporarily magnetizing the measuring strip, and a sensor unit for detecting changes in the generated temporary magnetic field. In the installed state, the sensor unit, together with the magnetic field generating device, is arranged on the car opposite the fixed measuring strip. The magnetic field generating device generates a magnetic field that also segments through the opposing measuring strip, resulting in the formation of magnetic flux therein. Since the measuring strip includes a position code formed by material changes, the magnetic field lines extending outside the measuring strip are also affected by the material changes and can then be detected by the sensor unit. Here, the current position of the car can be read from the measuring strip without contact. However, the known sensor system has increased requirements in terms of signal evaluation and signal quality, resulting in particularly smaller read tolerances and thus increased requirements in the precise arrangement of the measuring strip relative to the assigned sensor unit. Summary of the Invention

[0004] Therefore, the present invention aims to solve and at least partially eliminate the drawbacks known from the prior art. In particular, the object of the present invention is to provide an improved sensor system for position detection, which particularly achieves optimized signal generation for position detection.

[0005] This objective is achieved by a sensor system according to the features of the independent claim. Advantageous improvements of the invention are described in the dependent claims. The invention also solves other problems or represents solutions to other objectives, as can be seen from the following description.

[0006] In a first aspect, the present invention relates to a sensor system for detecting the position of a movable elevator car, comprising: a measuring strip made of ferromagnetic material that can be vertically arranged in the elevator shaft and extends longitudinally in the installed state, the measuring strip having a position code formed by material variation; and a sensor unit for detecting magnetic flux lines that can be arranged on the car, wherein the sensor unit has a magnetic field generating device for generating a magnetic field, wherein the magnetic field generating device is arranged on the side of the measuring strip, preferably on both sides, in the installed state, in a cross-sectional view of the measuring strip, i.e., perpendicular to the longitudinal direction of the measuring strip.

[0007] The magnetic field generating device according to the invention is arranged on the side, preferably both sides, of the measurement strip to achieve optimized coupling and guidance of magnetic flux in the measurement strip, especially in the lateral direction of the measurement strip. This enables optimized signal generation for material changes in position encoding, which simplifies the detection and reading of position encoding by the sensor unit.

[0008] In a preferred embodiment, the measuring strip extends in the transverse direction and thus perpendicular to the longitudinal direction of the measuring strip in a cross-sectional view between two opposing magnetic field generating devices. More preferably, the magnetic field generating devices are arranged such that a magnetic flux can be generated in the measuring strip in the transverse direction from a first side of the measuring strip to an opposing second side.

[0009] Here, the magnetic flux of the magnetic field generating device is preferably laterally coupled into and may be incorporated into the measuring band over the entire thickness of the measuring band. Specifically, the magnetic flux is not coupled into the measuring band through a relatively large surface on the front or rear side of the measuring band, as is known from the prior art, but rather coupled into the measuring band on a relatively thin side surface. Furthermore, the side surface of the measuring band, extending substantially parallel to the thickness of the measuring band, preferably extends parallel to the corresponding opposing surface of the magnetic field generating device.

[0010] The magnetic field generating device may include permanent magnets or electromagnets. Preferably, the magnetic field generating device has at least one first and a second permanent magnet, particularly a rod magnet, which preferably extends substantially parallel to the longitudinal direction of the measuring band. Here, the permanent magnets preferably have different pole orientations, such that a magnetic flux is formed between the two opposing magnets in the transverse direction of the measuring band.

[0011] The sensor unit, movable with the car, is advantageously arranged on the car such that the magnetic field generating device, preferably comprising two magnet units, is arranged relative to the fixed measuring strip such that the measuring strip is positioned between the two magnet units in a transverse direction extending laterally than the longitudinal direction. The magnetic field generating device, in particular the two magnet units, can then be moved longitudinally with the car to magnetize at least one sub-region of the measuring strip depending on the current operating shaft position and / or generate there a magnetic flux that can be formed in the transverse direction, which penetrates the measuring strip completely in terms of its thickness and preferably along the transverse direction of the measuring strip.

[0012] Advantageously, arranging the magnetic field generating devices on both sides of the measuring band allows the measuring band to be fully penetrated by magnetic flux, particularly locally and / or temporarily along its longitudinal extension, across the entire width of the measuring band. This magnetic flux is preferably formed between a north pole, which can be formed by the magnetic field generating devices, and a south pole, which can also be formed by the magnetic field generating devices. In other words, since the measuring band is preferably centrally arranged between the magnetic field generating devices, a magnetic short circuit occurs through at least one sub-region formed along the longitudinal direction of the measuring band, which in particular consists of two spatially separated magnetic units. Here, the magnetic flux in the measuring band can be particularly effectively formed by the magnetic short circuit between the magnetic field generating devices generated by the measuring band.

[0013] In a preferred embodiment, a sensor unit including a sensor detection area is configured in the car in the installed state to detect stray field lines extending outside the measuring belt. These stray field lines are specifically affected by and / or can be generated by material changes and at least partially penetrate the sensor detection area.

[0014] The magnetic field lines extending outside the measuring band are generated by or influenced by position-encoded material variations. For example, the material variation can be formed by material recesses, particularly through rectangular breaks formed in the longitudinal direction. Alternatively, the breaks can be arc-shaped or serrated. Within the respective breaks, straight field lines are formed when the measuring band interacts with the magnetic field generating device. These straight field lines cross the breaks in the most direct manner possible and are referred to as the main field and / or main field lines within the scope of this invention. Arc-shaped field lines are also formed around the respective breaks; these arc-shaped field lines are referred to as stray field and / or stray field lines in this invention.

[0015] Within the scope of this design, these stray field lines should now be accurately detected by the sensor unit according to the invention, so that the position code, in particular a binary or ternary code, can be read from the measuring band relative to its longitudinal direction. Advantageously, this enables the non-contact reading of the position code formed in the measuring band. In other words, the position code advantageously forms a binary or ternary code readable by the sensor unit. The position code is preferably formed sequentially or, more preferably, absolutely. Thus, the control unit assigned to the sensor system can determine the absolute position of the car, particularly by reading the position code.

[0016] Here, according to the present invention, the preferred ternary position encoding enables optimized encoding of the measurement band and, in particular, increased information density.

[0017] In a particularly preferred embodiment, the encoding includes ternary encoding, which preferably maps to 3... 9 Bit to 3 16 Bit, more preferably 3 10 Bit to 3 12 Absolute encoding of bits. For example, here, when a bit length is predefined in the longitudinal direction of the measurement band, such as 8 mm, this bit length corresponds to the longitudinal segment of the measurement band in which material changes occur, such as the material break section used to provide bits, and when 3 10 When encoding approximately 472m, absolute encoding of the measurement strip is possible.

[0018] Here, the encoding is chosen in such a way that the possible shaft length can reach 472m, so as to achieve absolute encoding of the position in the operating shaft.

[0019] Further advantageously, the coding mapped in the measuring tape is configured as a circular coding. This means that the coding is repeated in predefined sections within the produced measuring tape. For example, all 472m of repeated codes, e.g., a length of 10km, can be generated in a continuous measuring tape using the aforementioned ternary coding. The measuring tape can then be wound onto a transport drum or storage drum and cut to the necessary length for the operating shaft for the appropriate use of the continuous measuring tape roll. Here, the operating shaft length should not exceed the specified coding length, because the corresponding absolute value in the operating shaft should only be coded once. Here, the sensor unit of the system is advantageously configured to identify the corresponding zero value or measuring tape section transition value arranged between the repeated coded sections in the measuring tape.

[0020] This configuration can significantly reduce material waste, especially when the measuring band is shortened to the corresponding operating well length.

[0021] When using ternary encoding, it is further advantageous that the sensor unit, which has multiple sensors arranged parallel to the measurement band and is known from the prior art for reading the measurement band encoding, can be shortened in length.

[0022] Position coding advantageously includes a first coding track and at least one second coding track, each of which is configured along the longitudinal direction in the measurement band.

[0023] In this regard, the first encoding track and at least one second encoding track are preferably arranged adjacent to each other along the entire longitudinal direction of the measuring strip. For this purpose, the measuring strip is divided into segments of equal width, particularly in the transverse direction. Therefore, advantageously, the information content of the measuring strip in the longitudinal direction can be increased, and / or improvements can be achieved regarding the generation of the sensor output signal. In a preferred embodiment, the measuring strip comprises exactly two encoding tracks arranged side-by-side in the longitudinal direction and preferably separated from the central longitudinal axis of the measuring strip.

[0024] In the longitudinal direction, the position encoding within the first and second encoding tracks can be offset and / or alternately configured, wherein binary information can then be read along the longitudinal direction relative to equidistant points, for example from the first or second encoding track. Advantageously, this produces a simplified sensor unit necessary for the detection of stray field lines, since only values ​​such as "+1", "-1", and "0" need to be generated as the sensor output signal.

[0025] Here, the binary code can advantageously be formed by material recesses preferably arranged alternately in the first and second coding tracks of the position coding in the longitudinal direction of the measuring band.

[0026] The ternary encoding of the position code preferably includes material recesses and / or longitudinal segments of the measuring band without material recesses arranged laterally side-by-side in the lateral direction of the first and second encoding tracks of the position code. Here, the corresponding measuring band segments without material recesses extend at a desired bit length, for example, 8 mm. Thus, a "0" or neutral value can be read, for example, by a sensor unit. Other values ​​of the ternary encoding, such as "+1" and "-1", can be read by the shape of material recesses preferably alternately arranged in the first and second encoding tracks of the position code in the longitudinal direction of the measuring band, similar to the binary encoding described above.

[0027] However, as an alternative to the aforementioned implementation, it can be further specified that information can be read at the same longitudinal position of the measurement strip in the first encoding track and the second encoding track along the longitudinal direction of the measurement strip, and this information must then be detected and processed separately by the sensor unit accordingly.

[0028] The measuring strip is preferably made of metal, especially steel. The measuring strip preferably has a constant thickness between 0.1 mm and 0.9 mm, more preferably between 0.2 mm and 0.7 mm, and even more preferably between 0.2 mm and 0.5 mm. Furthermore, the measuring strip preferably extends in the transverse direction with a width between 8 mm and 25 mm, more preferably between 8 mm and 20 mm. Here, the measuring strip preferably has a constant, especially rectangular, cross-section.

[0029] The thickness of the measuring tape, as further disclosed, represents an optimal balance between the mechanical and magnetic properties of the measuring tape. That is, on the one hand, it is desirable that the measuring tape can still be wound on a roll or drum for ease of handling during manufacturing, transport, and installation. However, it must also have sufficient load-bearing capacity to prevent tape breakage during installation or maintenance work. Furthermore, magnetic saturation within the measuring tape should not occur, as this would prevent the implemented position coding from being clearly read.

[0030] Furthermore, the material variation used for implementing position coding consists of a material recess or a plurality of first and second breaks, wherein the first and second breaks are oriented or extended and / or repeated along the longitudinal direction in the measurement band for continuous position coding.

[0031] According to an improved embodiment of the invention, the first break is configured along the longitudinal direction such that it forms a straight inner contour, an arcuate inner contour, or a serrated inner contour. Here, the straight inner contour can be understood as a break in the measuring band that has a rectangular design in a top view of the measuring band, wherein the length extension of the rectangle in the longitudinal direction can have different length units. Advantageously, the stray field lines extending outside the measuring band can be optimized by the correspondingly adapted inner contours of the break. Advantageously, this results in the generated stray field lines having a more uniform and therefore more easily detectable path by the sensor unit, thus the sensor output signal of the sensor unit includes improved signal quality.

[0032] Furthermore, it is further specified that, in the transverse direction, a material web (18) is formed between the inwardly oriented outer inner surface of the inner contour and the outwardly oriented side surface of the measuring band. This material web (18) has a length dimension of at least 1.5 mm relative to the transverse direction, particularly when the width of the measuring band (2) in the transverse direction extends to approximately 9 mm to 11 mm, preferably 10 mm. In this context, the material web can be understood as achieving a minimum width between the recesses used for position encoding in the measuring band and the outer edge of the measuring band, which has a beneficial effect on the magnetic and mechanical properties of the measuring band.

[0033] Within the scope of an additional improvement of the invention, it is now specified that the sensor unit having the sensor detection area is oriented on the car in the installed state such that a first stray field line that can be generated from the first coding track in the sensor detection area is configured at an angle, and in particular substantially orthogonal, to a second stray field line that can be generated from at least the second coding track in the sensor detection area.

[0034] Here, the sensor detection area of ​​the sensor unit is preferably the effective measurement area of ​​the sensor unit, within which the number and / or orientation of flux lines can be detected and thus output as a sensor output signal for further processing. The sensor detection area particularly has a Hall sensor or is formed by a Hall sensor. Hall sensors are configured and arranged to detect stray field lines that may arise at corresponding material changes in the measurement band.

[0035] By orienting the stray field lines generated by the first coding track and the stray field lines generated by the second coding track differently, a sensor unit with only one sensor detection area can thus assign the detected stray field lines to the first coding track or the second coding track, thereby saving the number of components and thus saving material costs.

[0036] In this respect, it is further specified that the sensor unit, including the sensor detection area, is arranged on the car in the installed state such that the sensor detection area is oriented at an angle, preferably substantially orthogonal, to the upper outer surface or surface formed by the measuring belt in the longitudinal and transverse directions. More preferably, the sensor detection area is centered or arranged relative to the central longitudinal axis of the measuring belt. Advantageously, this allows a portion of the arcuate stray field line generated by the first or second coded track to pass through the sensor detection area such that the sensor unit can distinguish between the stray field lines generated by the first coded track and those generated by the second coded track due to the orientation of the stray field lines.

[0037] More preferably, the sensor detection area extends between the first detection end segment and the second detection end segment, wherein the sensor unit is arranged on the car relative to the measuring belt in the installed state such that, in the cross-sectional view of the sensor unit and the measuring belt, the first detection end segment is arranged in the lateral direction and / or oriented in the region of material variation of the first coded track, and the second detection end segment is arranged in the lateral direction and / or oriented in the region of material variation of the second coded track.

[0038] In particular, the angled, preferably substantially orthogonal, orientation of the sensor detection area relative to the outside allows a sensor unit with only one sensor detection area to be penetrated by rising or falling stray field lines, which can be easily detected and output in sensor technology, especially by conventional Hall sensors.

[0039] In this regard, it is further specified that the first detection end segment is centrally arranged and / or oriented relative to the material change of the first coding track in the transverse direction, and / or the second detection end segment is centrally arranged relative to the material change of the second coding track in the transverse direction. In this regard, central arrangement can be particularly understood as the material change being formed by rectangular recesses in the longitudinal direction, and the sensor detection area, particularly orthogonal to the outer orientation of the measurement band, is thus centrally arranged relative to the measurement band in the transverse direction such that the right detection end segment extends in the perpendicular bisector of one of the right recesses and the left detection end segment extends in the perpendicular bisector of one of the left recesses.

[0040] It can be further specified that the sensor unit is configured such that the sensor detection area in the lateral direction includes: a first sensor detection area, such as a first Hall sensor, for detecting stray field lines generated by the first coded track, and a second sensor detection area, such as a second Hall sensor, for detecting stray field lines generated by the second coded track. Advantageously, the information density can thus be increased by simultaneously reading the first and second coded tracks, thereby achieving, in particular, a more accurate resolution for position recognition in the longitudinal direction.

[0041] Preferably, the magnetic field generating device is composed of a permanent magnet device or an electromagnet device. Permanent magnet devices advantageously simplify the technical operation of the sensor system. However, the design of permanent magnet devices requires rare earth elements, resulting in relatively high material costs. Therefore, within the scope of this invention, it is further specified that the magnetic field generating device is composed of an electromagnet device, wherein, preferably by at least one energized coil unit, and more preferably by at least two coil units arranged on the side of the measuring band, a magnetic field can be generated only temporarily and / or relative to the longitudinal extension of the measuring band. Advantageously, in this respect, the magnetic flux generated in the measuring band can also be selectively influenced by variations in current intensity.

[0042] Furthermore, within the scope of this invention, protection is also required for elevator equipment that, in its installed state, includes a car movable between at least two floors in a running shaft and a sensor system according to the invention. Attached Figure Description

[0043] Further advantages, features, and details of the invention will emerge from the following description of preferred embodiments, taken with reference to the accompanying drawings. In the drawings:

[0044] Figure 1 A schematic side view of a preferred embodiment of the elevator device according to the present invention is shown;

[0045] Figure 2a , Figure 2b A schematic cross-sectional view of the sensor system according to the invention is shown in a preferred embodiment in the installed state when the magnetic field lines interact with the sensor unit;

[0046] Figure 3 A schematic cross-sectional view of the sensor system according to the present invention is shown;

[0047] Figure 4 A schematic top view of the dual-track measuring strip according to the first embodiment is shown; and

[0048] Figure 5 A schematic top view of the dual-track measuring belt according to the second embodiment is shown. Detailed Implementation

[0049] exist Figure 1 An elevator system 100 is shown, having a car 101 movable within an elevator shaft or running shaft 102, the car 101 facilitating the transport of people and / or goods between at least two floors 103a, 103b, 103c, 103d. For position detection of the car 101, the elevator system 100 includes a sensor system 1 according to the invention, which includes a measuring band 2 and sensor units 4 and is designed according to a first preferred embodiment.

[0050] The measuring belt 2, fixedly arranged in the operating shaft 102 in the installed state, extends longitudinally relative to the vertical operating shaft 102 and has a position code 3 along the longitudinal direction L for detecting the position of the car 101 within the operating shaft 102 (see Figure 4 , Figure 5 The position code 3 preferably consists of a first coding track 31 and a second coding track 32 arranged adjacent to each other in the lateral direction Q relative to the measurement band 2.

[0051] The sensor unit 4, which constitutes the interaction with the fixed measuring band 2, is arranged on the car 101 in the installed state such that the measuring band 2 is centered relative to the first magnet unit 61 and the second magnet unit 62 (not shown in detail here) in the lateral direction Q, which constitute the magnetic field generating device 6 and thus locally magnetize the measuring band 2 relative to the longitudinal direction L. This results in a magnetic flux in the lateral direction Q in the region of the measuring band that completely penetrates the measuring band 2.

[0052] Furthermore, the sensor unit 4 is configured to detect magnetic flux lines outside the measurement band 2 and thus generate a sensor output signal for further processing depending on the orientation of the magnetic flux lines.

[0053] exist Figure 2a The schematic cross-sectional view in the figure illustrates a preferred embodiment of a sensor system 1 according to the invention for detecting the position of a car 101 within a running shaft 102.

[0054] Sensor system 1 includes a measuring band 2 made of ferromagnetic material, which forms a position code 3 by means of material variation in a substrate. Furthermore, according to the invention, sensor system 1 includes a sensor unit 4 that forms magnetic field lines constituting a stray field outside the measuring band 2 in the sensor detection area 5; these magnetic field lines are also referred to as stray field lines S1 and S2. Additionally, sensor unit 4 includes a magnetic field generating device 6 for generating a magnetic field locally constituting within the measuring band 2 relative to the longitudinal direction L, wherein a magnetic flux is formed in the measuring band 2, extending completely through the measuring band 2 relative to its width.

[0055] This cross-sectional view shows that, in the installed state, the measuring band 2 is centered relative to the first magnet unit 61 and the second magnet unit 62 of the magnetic field generating device 6 in the lateral direction Q, so that the measuring band 2 is locally magnetized relative to the longitudinal direction L. Furthermore, the dashed line represents the dividing line formed in the measuring band 2 between two regions of the first encoding track 31 and the second encoding track 32 that are adjacent to each other in the lateral direction Q, both of which are formed in the measuring band 2 along the longitudinal direction L. In the schematically shown cross-section of the measuring band 2, the first encoding track 31 includes a material recess 9 formed in the substrate of the measuring band 2, while the second encoding track 31 does not include the material recess 9 at the shown longitudinal position.

[0056] In operation, a magnetic field is formed between the first magnet unit 61 and the second magnet unit 62 of the magnetic field generating device 6, which may be composed of two opposing rod magnets preferably with different pole orientations. This magnetic field is magnetically short-circuited by the centrally arranged measuring band 2, which is designed with a ferromagnetic material. Here, magnetic flux is coupled from the adjacent side surface 61a of the magnetic field generating device to the outer surface or side surface F1 of the measuring band 2, and over the entire thickness t of the measuring band to the opposing outer surface or side surface F2 of the measuring band. Within the measuring band 2, this therefore results in a magnetic flux with a high flux density due to the material permeability constant of the measuring band, which completely penetrates the measuring band 2 in the transverse direction Q. Magnetic flux is also formed within the material recess 9, which can now be divided into a main flux and a stray flux. To cross the recess, a main flux is formed within the recess, which is formed by the entire straight field line that crosses the air gap directly. In addition, stray fluxes are formed, which consist of arc-shaped, upward and downward curved field lines, which are called stray field lines.

[0057] A portion of the stray field is represented in this schematic diagram by an arc-shaped stray field line S1. The path of the stray field line can now be detected by the sensor unit 4, and due to the path descending relative to the graph plane, a first preferred positive sensor output signal is generated by the sensor system 1 according to the invention.

[0058] exist Figure 2b The text shows from Figure 1 A known cross-sectional view shows that the car 101 now moves relative to the measuring belt 2 together with the sensor unit 4. At the schematically shown longitudinal position of the measuring belt 2, the material recess 9 is now located in the second coded track 32. Here, a magnetic field is also formed by the magnetic field generating device 6, which is magnetically short-circuited by the measuring belt 2, and thus constitutes a magnetic flux extending along the entire width of the measuring belt 2.

[0059] Furthermore, here, a stray field is formed due to the material recess 9 in the second coding track 32, which is schematically shown in part by the arc-shaped stray field line S2 and penetrates the sensor detection area 5 of the sensor unit 4. Since the stray field line now has an ascending path relative to the plane of the drawing in the sensor detection area 5, this results in a relative... Figure 2a The second sensor output signal, which is in the opposite position shown in the diagram, specifically results in a negative sensor output signal.

[0060] Figure 3A cross-sectional view of a known sensor system 1 shows the spatial extension of the sensor system 1 according to the invention. As can be seen from the figure, the sensor detection region 5 of the sensor unit 4, configured as a Hall sensor according to the invention, extends between a first right detection end segment 14 and a second left detection end segment 15. Furthermore, the spatial arrangement of the sensor unit 4 and the measuring band 2, depicting the installed state of the sensor system 1, shows that the right detection end segment 14 is arranged in the region of the material recess 9 of the first encoding track 31 in the lateral direction Q. In this embodiment, the right detection end segment 14 is precisely oriented within the material recess 9 in the lateral direction Q and thus forms a perpendicular line to the material recess 9, which extends perpendicularly to the upper side of the measuring band 2, i.e., the outer side of the measuring band.

[0061] This also applies accordingly to the left detection end segment 15, which is also centered in the lateral direction Q of the material recess 9 with a straight inner contour relative to the second coding track 32 and thus forms a vertical line relative to the corresponding material recess 9.

[0062] Figure 4 A top view of the measurement band 2, shown in segments, according to a preferred embodiment, is illustrated. Dashed lines divide the measurement band 2 into a first measurement band half 7 and a second measurement band half 8 in the longitudinal direction L, wherein a first coding track 31 is formed in the first measurement band half 7 and a second coding track 32 is formed in the second measurement band half 8 along the longitudinal direction L in the measurement band 2.

[0063] Furthermore, as can be seen from the top view of the outer side or surface 13 of the measuring band, the material variation used for implementing position coding 3 along the longitudinal direction L in the measuring band 3 is constituted by a first break portion 10 and a second break portion 11. The first and second break portions 10, 11 are formed along the longitudinal direction L, either in the first coding track 31 or the second coding track 32, and include a preferred straight inner contour 12 formed in the longitudinal direction L. Here, the break portions 10, 11 may have two length units for representing a single or double position. Therefore, rectangular recesses 10, 11 are produced in the measuring band 2, which is made of steel, and these rectangular recesses 10, 11 are arranged transversely to the flux lines that can be formed in the measuring band 2 by means of the sensor unit 4. Here, the measuring band 2 made of steel preferably has a thickness t of 0.2 mm to 0.7 mm, which represents an optimal value between mechanical tear resistance and magnetic permeability for the present invention. Furthermore, the measuring band shown includes a width extension of 10 mm in the transverse direction Q, wherein, in the transverse direction Q, a material web 18 with a width of 1.5 mm in the transverse direction Q is formed between the inwardly oriented inner surface 16 of the first recess 10 formed in the first coding track 31 and the outwardly oriented lateral outer surface 17 of the measuring band 2.

[0064] exist Figure 5 The diagram illustrates another embodiment of the measuring band 2 according to the invention, which differs from the first embodiment in that the first and second interrupted portions 10, 11 formed in the first encoding track 31 and the second encoding track 32 are partially arranged opposite each other relative to the longitudinal direction L and thus adjacent to each other in the transverse direction Q, in order to achieve additional encoding. In particular, ternary encoding can be achieved thereby. In such a configuration, the arcuate stray field lines generated by the concave portions arranged sequentially in the transverse and magnetic flux directions are in the sensor detection area 5 (see Figure 2a , 2b This neutralization ensures that the sensor does not output positive or negative measurement signals, but rather a neutral or zero signal. As an alternative to this configuration, the position encoding for providing the ternary encoded neutral measurement value or zero signal can have a longitudinal section ML of the measurement band in the longitudinal direction L, which, along a specified bit length (e.g., 8 mm) of the encoding, does not have material recesses in the measurement band. Alternatively, a single groove can be arranged in the longitudinal section ML of the measurement band, extending along the specified bit length in the longitudinal direction L and simultaneously extending in the transverse direction Q via two encoding tracks 31, 32.

[0065] Explanation of reference numerals in the attached figures:

[0066] 1 Sensor System

[0067] 2. Measuring tape

[0068] 2a First side

[0069] 2b Second side

[0070] 3. Location coding

[0071] 4 sensor units

[0072] 5. Sensor detection area

[0073] 6. Magnetic field generating devices

[0074] 7 First measuring band half

[0075] 8 Second measuring band half

[0076] 9 Material recesses

[0077] 10 First Fracturing Section

[0078] 11 Second Fracturing Section

[0079] 12 Inner contour

[0080] 13. Outside the measuring strip

[0081] 14 First detection end segment

[0082] 15 Second detection end section

[0083] 16 Inwardly oriented inner surfaces

[0084] 17. Outwardly oriented lateral surface

[0085] 18. Material Web

[0086] 31 First coding track

[0087] 32 Second coding track

[0088] 61 First Magnet Unit

[0089] 62 Second Magnet Unit

[0090] 62a and 62b surfaces

[0091] 100 Elevator Equipment

[0092] 101 Car

[0093] 102 Operating Shaft

[0094] 103a-103d floor stations

[0095] b. Web width of material

[0096] L (vertical direction)

[0097] M Central longitudinal axis

[0098] ML measurement belt longitudinal section

[0099] Q. Horizontal direction

[0100] t Measurement of belt thickness

[0101] F1, F2 side surfaces

[0102] S1, S2 stray field lines

Claims

1. A sensor system (1) for detecting the position of a car (101) of an elevator (100) capable of moving along an elevator shaft (102), comprising: A measuring strip (2) made of ferromagnetic material, which can be vertically arranged in the elevator shaft (102) and extends along the longitudinal direction (L) in the installed state, the measuring strip (2) having a position code (3) formed by material variation; and a sensor unit (4) arranged on the car (101) for detecting magnetic flux lines, wherein the sensor unit (4) has a magnetic field generating device (6) for generating a magnetic field, characterized in that the magnetic field generating device (6) is arranged on both sides of the measuring strip (2) in the cross-sectional view of the measuring strip in the installed state, and the magnetic field generating device (6) is arranged such that a magnetic flux is formed in the measuring strip (2) in the transverse direction (Q) of the measuring strip from the first side (2a) to the opposite second side (2b) over the entire thickness (t) of the measuring strip.

2. The sensor system (1) according to claim 1, characterized in that, The measuring strip (2) extends in the transverse direction (Q) between two opposing magnetic field generating devices (6) in the cross-sectional view.

3. The sensor system (1) according to claim 1, characterized in that, The side surfaces (F1, F2) of the measuring band, which extend substantially parallel to the thickness (t) of the measuring band, extend parallel to the surfaces (62a, 62b) of the magnetic field generating device (6) that are respectively opposite to the side surfaces (F1, F2).

4. The sensor system (1) according to claim 1, characterized in that, The magnetic field generating device (6) includes a permanent magnet device or an electromagnet device, at least one first permanent magnet and at least one second permanent magnet, the first permanent magnet and the second permanent magnet extending substantially parallel to the longitudinal direction (L) of the measuring strip (2).

5. The sensor system (1) according to claim 1, characterized in that, The sensor unit (4) includes a sensor detection area (5) and is configured in the installed state to detect stray field lines (S1, S2) that can form outside the measurement band (2), the stray field lines (S1, S2) at least partially penetrating the sensor detection area (5).

6. The sensor system (1) according to claim 1, characterized in that, The position code (3) constitutes a binary or ternary code that can be read by the sensor unit (4).

7. The sensor system (1) according to claim 6, characterized in that, The binary code is formed by material recesses (9) arranged alternately in the first encoding track (31) and the second encoding track (32) of the position code (3) in the longitudinal direction (L) of the measuring band (2).

8. The sensor system (1) according to claim 6, characterized in that, The ternary encoding includes material recesses (9) arranged laterally side by side in the transverse direction (Q) and / or longitudinal segments (ML) of the measuring band without the material recesses (9) in the first encoding track (31) and the second encoding track (32) of the position encoding (3).

9. The sensor system (1) according to claim 1, characterized in that, The measuring band (2) is made of metal strip, and / or the measuring band (2) has a measuring band thickness (t) between 0.1 mm and 0.9 mm, and / or the measuring band (2) extends in the transverse direction (Q) with a width between 8 mm and 20 mm.

10. The sensor system (1) according to claim 7 or 8, characterized in that, The material recess (9) of the position code (3) includes a break (10, 11) which forms a straight inner contour, an arc-shaped inner contour or a sawtooth inner contour (12) along the longitudinal direction (L).

11. The sensor system (1) according to claim 7 or 8, characterized in that, In the transverse direction (Q), a material web (18) is formed between the inwardly oriented inner surface of the inner contour (12) of the material recess (9) of the position code (3) and the outwardly oriented side surface (F1, F2) of the measuring band (2), the material web (18) having a length dimension of at least 1.5 mm.

12. The sensor system (1) according to claim 7 or 8, characterized in that, The sensor unit (4) having the sensor detection area (5) is oriented relative to the measuring belt (2) on the car (101) in the installed state such that a first stray field line (S1) generated from the first coding track (31) in the sensor detection area (5) is angularly formed relative to a second stray field line (S2) generated from the second coding track (32) in the sensor detection area.

13. The sensor system (1) according to claim 12, characterized in that, The sensor unit (4), including the sensor detection area (5), is arranged on the car (101) in the installed state such that the sensor detection area is oriented at an angle relative to the surface (13) formed by the measuring strip (2) in the longitudinal direction (L) and the transverse direction (Q), and is centered relative to the central longitudinal axis (M) of the measuring strip (2).

14. The sensor system (1) according to claim 13, characterized in that, The sensor detection area (5) extends between the first detection end section (14) and the second detection end section (15), wherein the sensor unit (4) is arranged on the car (101) relative to the measuring belt (2) in the installed state such that, in the cross-sectional view of the sensor unit (4) and the measuring belt (2), the first detection end section (14) is arranged in the transverse direction (Q) in the region of material variation of the first coding track (31) of the position code (3), and the second detection end section (15) is arranged in the transverse direction (Q) in the region of material variation of the second coding track (32) of the position code (3).

15. The sensor system (1) according to claim 14, characterized in that, The first detection end segment (14) is centered in the lateral direction (Q) relative to the material change in the first coding track (31), and / or the second detection end segment (15) is centered in the lateral direction (Q) relative to the material change in the second coding track (32).

16. An elevator device (100) comprising a car (101) capable of moving between at least two landings (103a-103d) in an elevator shaft (102) and a sensor system (1) according to any one of claims 1 to 15.

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