METHOD FOR READ INFORMATION FROM A ONE- OR MULTI-DIMENSIONAL CODING FIELD

Description

[0001] The invention relates to a method for reading information from a one- or multi-dimensional coding field.

[0002] It is known from the prior art to sequentially scan magnetic information, which is stored, for example, in a magnetic carrier material, using inductively responding sensor devices, such as coils with a winding core, by applying a relative motion between the carrier containing the information and the sensor. Such operating principles have long been known in the analog domain, for example, in the case of magnetic tapes. In the digital domain, this inductive scanning of magnetic information based on inducing relative motion is used, for example, in the magnetic track of credit and / or debit cards, hard drives, and the like.

[0003] A disadvantage of the aforementioned inductive reading of data stored in a magnetic carrier is that the relative speed (sampling speed) between the sensor device and the carrier material containing the information must lie within a range between a minimum and a maximum speed in order to reliably read the data correctly. A relative movement that is too slow or too fast can lead to undesirable read errors.

[0004] Furthermore, it is sometimes even necessary for the inductive sensor to touch the magnetic carrier, potentially causing increased wear on both the sensor and the carrier. If contact is to be avoided, complex measures are required to ensure a narrow gap during scanning, which is undesirable.

[0005] WO 2011 / 005 222 A1 describes a method for reading information from a coding field.

[0006] A magnetic card reader is known from US 4 585 930.

[0007] The object of the invention is therefore to provide a method for reading information from a one- or multi-dimensional coding field which is able to be particularly fault-tolerant with respect to relative movements and their magnitude between a coding field and a sensor device, as well as to make the reading process particularly simple and process-reliable.

[0008] Furthermore, a high sampling rate should be ensured in order to capture a large amount of information in parallel or sequentially.

[0009] Furthermore, the possibility should be created to provide a high level of selection quality without contact.

[0010] These problems are solved by a method having the features of claim 1. Advantageous embodiments are specified in the dependent claims.

[0011] A method according to the invention is a method for reading information from a one- or multi-dimensional coding field, wherein the information is stored within boundaries of the coding field and wherein the information is present in the one- or multi-dimensional coding field by means of a magnetic and / or magnetizable medium and a magnetically sensitive sensor device is used for reading the information, comprising the steps: a) Locally aligning the one- or multi-dimensional coding field and the sensor device at a distance less than or equal to a maximum sensing distance; b) Aligning the sensor device relative to the coding field such that a sensor device field of view captures at least a part of the information-containing sub-area of ​​the one- or multi-dimensional coding field; c) Sensing the information in a single sensing step, either all at once or sequentially, in at least one suitable alignment position using the sensor device in at least one or more point detections, line detections, and / or at least one matrix detection for the information; d) wherein the detection of the information during the detection reading process is carried out in such a way that no readout relative movement of a point, line, or matrix sensor of the sensor device relative to the coding field is performed, characterized in thatthat prior to the sensing of the information in the sensing step, at least one BEFORE reference information is read from a predefined boundary area of ​​the coding field in a data acquisition step, wherein BEFORE reference information is present in the predefined boundary area of ​​the coding field by means of a magnetic and / or magnetizable medium, and wherein the sensing result of the BEFORE reference information is qualitatively evaluated by comparing the sensed BEFORE reference information with a TARGET BEFORE reference information.

[0012] Such a method makes it possible to obtain a high-quality and fault-tolerant readout result of information. This is achieved in particular by ensuring that, at the time of information acquisition from at least a sub-area of ​​the coding field, there is no relative movement, or at least no movement except for possible interfering movements, between the sensor device and, if applicable, individual sensors of a plurality of sensors that constitute the sensor device. The invention proposes the specific selection of suitable sensor types with which the readout of magnetic information is possible, and, by providing for ideally no readout movement, ensures that the method according to the invention is independent of potentially inaccurate (too large or too small) readout movements.

[0013] This makes the readout process, i.e., the data acquisition process, particularly simple and reliable. The method according to the invention also makes it possible to provide high readout accuracy and quality without contact. By parallel or, in particular, rapidly successive serial scanning of information contained in the coding field, it is possible to capture a relatively large amount of information without requiring a defined readout movement and / or contact scanning.

[0014] By reading at least one "before" reference value from the coding field before sensing all the necessary information, and then qualitatively evaluating the sensing result of the "before" reference value by comparing it with a "target" reference value, a prediction about the sensing quality can be made before the actual readout process. If necessary, if poor pre-sensing occurs, the alignment position of the sensor device can be adjusted or corrected to improve the quality of the sensed "before" reference information.

[0015] According to a further preferred embodiment, the inventive method uses a Hall sensor, an MR matrix sensor, a saturation core matrix sensor (Förster probe), a Lorentz force magnetometer / sensor or a Squid sensor or an MI sensor as a sensor device in point, line and / or matrix design.

[0016] The sensor types mentioned above are particularly well-suited for reading magnetic information without relative motion between the sensor and the magnetic material. These sensor types can be conveniently used to implement point, line, or matrix sensors, with a point sensor being a single sensor element. A line sensor is a multiple sensor elements arranged in a line. A matrix design is particularly suitable for a large number of individual sensors arranged in rows and columns, similar to a sensor array.

[0017] Magnetic ink is particularly preferred as the magnetic and / or magnetizable medium.

[0018] Such a "storage fluid" has the advantage that it is printable and, in particular, overprintable, so that optical visibility of the code can be avoided while still ensuring magnetic readability.

[0019] In a further preferred embodiment, a 1D barcode, a 2D barcode, e.g. a QR code, a 3D code, or another unique pattern made of magnetic or magnetizable medium is used as the planar or spatial coding field.

[0020] The aforementioned construction methods of coding fields are comparable to an optical one-dimensional barcode, an optical two-dimensional barcode, e.g. a QR code field or a 3D code field, in which, for example, in the magnetic version, polarity information or magnetic field strength information can be read as a third dimension.

[0021] It is advantageous that, at least after alignment and before sensing, a pre-magnetizing magnetic field is generated along at least one sensor device field of view boundary, which acts on the magnetic and / or magnetizable material.

[0022] To improve readability, it is particularly recommended to perform premagnetization after aligning the sensor device relative to the coding field and before sensing along at least one sensor device field of view boundary, in order to better shape a magnetizable medium containing the information.

[0023] According to a further preferred embodiment, at least after alignment and before sensing, a pre-magnetizing magnetic field, in particular by one or more pre-magnetizing elements, is generated pointwise and / or linewise and / or areawise within the sensor device's field of view.

[0024] The premagnetization can be carried out in particular according to the above measure, depending on the sensor type used, such as point sensor / line sensor / matrix sensor, in a point-like and / or line-like and / or area-like manner.

[0025] Furthermore, it is preferred that the premagnetizing magnetic fields are maintained during sensing, in particular maintained in a weakened form.

[0026] The above measure improves the selection behavior or selection quality of the method according to the invention.

[0027] In a further preferred embodiment, at least one AFTER reference information is read from the coding field for all required information, and the sensing result of the AFTER reference information is qualitatively evaluated by comparing the sensed AFTER reference information with a TARGET AFTER reference information.

[0028] Analogous to the sensing of BEFORE reference information, the sensing of AFTER reference information described above can indicate a sensing quality after the actual readout process, so that in the subsequent course of the actual sampling / readout process of the information, it is highly likely that the quality of the data will lie between that of the BEFORE reference information and that of the AFTER reference information. Thus, it may be possible to make a statement about the readout / sensing quality using both sets of reference information.

[0029] The following measures are proposed.

[0030] Particularly preferred is a qualitative evaluation of the sensing result, which was sensed between the BEFORE reference information and the sensed AFTER reference information, based on a sensing result concerning the BEFORE reference information and a sensing result concerning the AFTER reference information.

[0031] According to a particularly preferred embodiment, the sensor field of view boundaries are projected optically onto a carrier body, which carries the one- or multi-dimensional coding field, to make the sensor field of view optically detectable. Alternatively, an optical centering marker in the form of a dot or line can be used to aim at the one- or multi-dimensional coding field.

[0032] Particularly when the sensor device is hand-operated, i.e., guided by a human operator, it may be useful to use an optical projection of the sensor device's field of view boundaries or the center of the coding field to indicate the sensor device's field of view, especially its limits, in order to make it easier for the operator to align the sensor device's field of view and the coding field.

[0033] Furthermore, preferably no relative movement takes place between the sensor device and the one- or multi-dimensional coding field to be sensed (readout movement) during the sensing process, i.e. during the acquisition of magnetic information.

[0034] Preferably, no relative movement occurs between the sensor device and the coding field to be sensed, at least during the sensing process. This makes it possible, in particular, to avoid inaccuracies in the sensing. According to the invention, the "absence of relative movement" means that no relative movement occurs that would enable a readout process, as is the case with inductive magnetic sensors known from the prior art. Interfering movements, such as tremors or vibrations, which occur when a handheld sensor cannot be held perfectly still by the operator or when a sensor mounted on a tripod or other support structure is subject to vibration or similar disturbances on a running machine, are avoided.The fact that the object begins to fluctuate is not to be understood as relative motion within the meaning of the invention, since such types of motion are not intentionally generated but are a consequence of certain arrangement systems.

[0035] Similarly, it may be intended that a uniform relative movement takes place between the coding field (or a portion thereof) and the sensor device. Such uniform movement is not essential for the reading process, but is, for example, due to the continuous transport of objects bearing the coding field to be read. The corresponding reading quality is tolerant of such "intentional" relative movement, which, however, is not essential for the reading process but serves other purposes.

[0036] According to a further preferred embodiment, a binary pattern or a pattern having "gray values" is used as the one- or multi-dimensional coding field, wherein "gray value" is understood to be an area which is a lower magnetized or lower magnetizable area compared to a maximum magnetization or a maximum magnetizability.

[0037] The above measures provide a simple way in which, for example, a planar coding field can contain information in three dimensions (two geometric dimensions and one dimension regarding the magnitude).

[0038] It is particularly advantageous if a line sensor consisting of at least two individual sensor elements is used as the sensor device for reading a 1D code, e.g. a barcode.

[0039] If, for example, only the reading of a barcode, i.e. a one-dimensional coding field, is possible, this can be done in a simple way with a linear sensor that is made up of at least two individual sensor elements.

[0040] According to a further particularly preferred embodiment, a sensor array, e.g. consisting of at least two rows with at least two individual sensor elements each, is used as a sensor device for reading out at least two-dimensionally (2D) encoded information (2D code).

[0041] Similarly, for reading an area-based coding field, either an area sensor, i.e., a sensor array, or a line sensor that sequentially samples row by row and / or column by column can be used.

[0042] Furthermore, for the reading of area-wise (2D) coded information (2D code), the sensor array preferably captures the information sequentially row-wise and / or column-wise within a single acquisition process.

[0043] In a further preferred embodiment, after a detection process, a point sensor, a line sensor or a matrix sensor is moved within a housing of the sensor device row by row or column by column towards a further detection position of the point / line and / or matrix sensors, and after the movement to the further detection position with the point / line and / or matrix sensors stationary relative to the housing, a further detection process is carried out.

[0044] A sequential readout of the information can be facilitated by the fact that a sensor device, e.g. a point sensor, a line sensor or an area matrix sensor, can be moved to different scanning positions relative to a housing of the sensor device, whereas preferably during the readout process itself, i.e. during the acquisition process itself, the point sensor, the line sensor or the matrix sensor is at rest relative to the housing and thus there is no relative movement between the coding field and the receiving / acquiring sensor device.

[0045] Similarly, it may be advantageous to move a point sensor, a line sensor, or a matrix sensor within the housing along with a coding field moving relative to the housing during the detection process, so that at least between the point sensor, the line sensor, and / or the matrix sensor, there is as little relative movement as possible during the scanning process, or at least a relative velocity vrel is present that is less than a maximum permissible relative velocity vrelmax.

[0046] According to another preferred embodiment, the relocation to further detection positions and the detection in further detection positions are carried out sequentially until all the required information contained in the coding field has been detected.

[0047] The relocation of the point / line and / or matrix sensors within the sensor device is particularly advantageous in a linear, row-like, column-like or arc-like stepped arrangement.

[0048] The relocation of the point / line and / or matrix sensors within the sensor device is particularly advantageous in a grid-like manner.

[0049] In a further preferred embodiment, the maximum relative velocity v relmax between the sensor device and the coding field is up to half the extent of the coding field per second in the direction of the relative velocity v rel .

[0050] A relative velocity v rel occurring due to circumstances up to the above-mentioned value still leads to selection results of sufficient quality in the method according to the invention.

[0051] In a further preferred embodiment, during the detection process, the point / line and / or matrix sensors within the housing of the sensor device are moved in the direction of the relative velocity v rel between the coding field and the housing, in particular moved so quickly that the maximum relative velocity v relmax suitable for static readout is not exceeded between the point / line and / or matrix sensors and the coding field.

[0052] The above measure makes it possible to achieve an increased relative speed, for example for the purpose of transporting the objects equipped with the coding field, while still maintaining a maximum permissible relative speed between the coding field and the sensor device in order to achieve the required sensing quality.

[0053] Particularly advantageous is the input of recorded data, either in its entirety, row-wise or column-wise serially, or in its entirety, row-wise or column-wise in parallel, to an evaluation unit which is designed and configured in such a way that a resulting overall information concerning the content of the coding field can be output from the serially or parallel incoming data.

[0054] The total information obtained in this way can be further processed in a known manner by a data processing system, e.g. containing an output device.

[0055] Furthermore, the invention is explained in more detail using the figures as examples. They show: Figure 1 : schematically depicts in a perspective view a first embodiment of a detection situation of the method according to the invention using a matrix sensor for detecting a 2D coding field; Figure 2: by way of example a second embodiment of a detection situation of the method according to the invention using a line sensor for reading a planar (2D) coding field, wherein the line sensor is moved in a grid-like manner; Figure 3 : a third embodiment of a detection situation of the method according to the invention, in which a single sensor element sequentially scans a 2D coding field in a grid-like manner; Figure 4 : schematically depicts a flowchart for an embodiment of the method according to the invention, including a possible quality control of the sensing result; Figure 5 Figure 1 shows a flowchart of the method according to the invention in its simplest embodiment.

[0056] Figure 1 The figure shows a highly schematic perspective view of a first embodiment of a possible acquisition situation for reading out information according to the inventive method.

[0057] A carrier body 1 has a coding field 2, which can have boundaries 3.

[0058] Within the coding field 2, information, in particular coded information, is preferably attached by means of a magnetic or magnetizable medium 4.

[0059] The information can be in the form of, for example, a one-dimensional code, e.g., a barcode 4a, a two-dimensional code, e.g., a QR code 4b, or other unique patterns 4c that contain information.

[0060] In the representation according to Figure 1 The aforementioned code types (barcode 4a, QR code 4b and other pattern 4c) are shown as examples in one and the same coding field 2.

[0061] Of course, it is possible to use only one of the codes described above or a selection from different code types in coding field 2.

[0062] A sensor device 5 has a sensor 6, which is arranged, for example, in a housing 7.

[0063] The sensor 6 can be configured as a line sensor, as a point sensor, as a matrix sensor, which corresponds to a sensor array of point sensors (individual sensors).

[0064] The sensor device 5 is arranged at a distance d from the coding field 2 and is located in the embodiment according to Figure 1 in relation to coding field 2, relatively speaking, at rest.

[0065] The distance d, which forms a sensing distance, is chosen such that a sensor device viewing field 8 covers at least a sub-area 9 of the coding field 2, wherein within the sub-area 9 the information to be sensed or at least a subset of the information to be sensed is arranged.

[0066] Within a sensor device field of view boundary 10, the sensor 6, which is configured as a point sensor (single sensor), line sensor, matrix sensor, i.e., sensor array, can read out information. The sensor transmits the read-out information to an evaluation unit 20, which evaluates the acquired information / data and, if necessary, supplies it to an output unit 21.

[0067] The sensing distance / distance d is chosen such that it does not exceed a maximum sensing distance d max.

[0068] In the present embodiment according to Figure 1 If sensor 6 is at rest relative to coding field 2, i.e., the relative velocity v rel between coding field 2 and sensor 6 is zero.

[0069] The relative velocity v rel can assume a maximum value, i.e., the coding field 2 can move relative to the sensor 6 with a maximum relative velocity v relmax, where the maximum relative velocity v relmax is chosen such that no unacceptably high inaccuracies arise in the sensing of the information due to this relative movement.

[0070] The inventive method using sensor 6 is characterized in that no relative velocity vrel between the coding field 2 and sensor 6 is necessary for reading purposes. In contrast, such a relative velocity is required for reading purposes in a sensor device according to the prior art, which is based on the operating principle of induction, since no electrical signal would be generated in an induction-based reader without such relative movement (i.e., with a readout velocity of 0).

[0071] The relative velocity v rel, which is permissible to a certain extent but not necessary within the scope of the present invention, is limited with respect to its height and, if applicable, also with respect to its direction only by the fact that, despite (not because of) this relative velocity v rel, proper readout is enabled by means of the selected sensors, which may be, for example, a Hall sensor, an MR sensor, a saturation core matrix sensor (Förster probe), a Lorentz force magnetometer / sensor, a Squid sensor, or an MI sensor.

[0072] All these sensors have in common that magnetic information can be detected without requiring any relative movement between the sensor and an object containing the magnetic information.

[0073] Nevertheless, it is sensible to allow certain relative movements with a maximum relative velocity vrelmax, since in everyday technical practice it is not always possible to ensure a completely motionless arrangement of the sensor device 5 relative to the coding field 2. For example, with a hand-held sensor device 5, the operator may exhibit trembling movements, which, however, are to be regarded as interfering movements in the method according to the invention and should ideally be avoided.

[0074] In the embodiment according to Figure 1Figure 1 shows a detection situation of the method according to the invention based on a matrix sensor 6b. Such a matrix sensor 6b is formed, for example, on a base plate 100, on which a sensor array 6c is mounted. The sensor array 6c has, for example, four rows w, x, y, and z and four columns W, X, Y, and Z. In addition, for example, one hundred premagnetizers 101 can be arranged on the base plate, with which the sensor device 5 is able to perform a premagnetization of the information contained in the coding field 2, e.g., stored in the medium 4, before detection.

[0075] Another recording situation of the inventive method shows Figure 2 The carrier body 1, the coding field 2 and the information contained therein correspond to the description given in connection with Figure 1 was handed in.

[0076] In contrast to the recording situation according to Figure 1In the present acquisition situation, sensor 6 is configured as a line sensor 6d, which captures columns W, X, Y, and Z. Line sensor 6d sequentially reads the information from the coding field 2 at different positions (positions of columns W, X, Y, and Z) and transmits it to the evaluation unit 20. An output unit 21 can optionally display the information. Alternatively, as in the acquisition situation according to... Figure 1 - the information is forwarded either directly from the sensor device 5 or via the evaluation unit 20, for example to a data acquisition device (not shown).

[0077] A third detection situation of the method according to the invention shows an example Figure 3The sensor 6 of the sensor device 5 is designed in this embodiment as a point sensor 6e, which is preferably movable in a detent-like manner along both the rows w, x, y, z and the columns W, X, Y, Z. Such a displacement capability is illustrated by arrows 102 and 103. In the present embodiment, after each individual detection by the point sensor 6e, which by its very nature can only scan a partial area of ​​the coding field 2 in one step, the point sensor 6e is moved either by one row or by one column and stopped there again. The next readout step takes place in the stopped position, so that despite a relative movement of the sensor, e.g., the point sensor 6e or the line sensor 6d, Figure 2 At the time of information acquisition from coding field 2, there should ideally be no relative velocity vrel or at most a maximum relative velocity vrelmax, as described above in connection with Figure 1as described, is available.

[0078] Figure 4 Figure 1 shows a flowchart of a particular embodiment of the method according to the invention. First, the sensor device 5 is positioned in a positioning step relative to the coding field 2 into a detection position.

[0079] Following this, in a first data acquisition step, a BEFORE reference is recorded and compared with a stored TARGET BEFORE reference. If the data acquisition result, i.e., the sensing result of the first data acquisition step regarding the BEFORE reference, is found to be OK, a second data acquisition step, the so-called sensing step, can take place, in which the relevant information stored in coding field 2 is recorded.

[0080] If the measurement result of the BEFORE reference is found to be unsatisfactory, the positioning step can be repeated to ensure, if necessary, improved measurement accuracy of the sensor device 5.

[0081] Following the sensing step, i.e., the acquisition step of the relevant information contained in the coding field 2, a second acquisition step of an AFTER reference is performed according to this embodiment of the inventive method. This AFTER reference is, for example, located—like the BEFORE reference—in a predefined boundary region of the coding field 2. The AFTER reference is then compared with a TARGET AFTER reference. If the AFTER reference is found to be satisfactory, it can be assumed that a sensing step of the information in the coding field 2 of sufficient quality has been performed between a satisfactory BEFORE reference and a satisfactory AFTER reference.

[0082] If the AFTER reference is deemed unsatisfactory or of insufficient quality, a further sensing step may be performed to allow for a re-capture of the AFTER reference, in order to exclude any interference from a later re-capture.

[0083] A qualitatively evaluated sensing result, or a sensing result found to be qualitatively acceptable, can be fed to the evaluation unit or an output unit of the sensing result.

[0084] In a further embodiment of the method according to the invention, which is a simple embodiment, the positioning step is carried out such that the sensor device 5 or the sensor 6 is moved relative to the coding field 2 into a position suitable for data acquisition / acquisition. Subsequently, the sensing step of reading the information contained in the coding field 2 takes place. The reading can be performed row-wise, column-wise, or for the entire matrix, either in parallel or sequentially. Preferably, the reading is performed without any relative movement of the sensor device to the coding field 2. The information acquired in the sensing step can then be supplied to an output.

[0085] The method according to the invention makes it possible to fulfill the problem set out in the invention in a particularly advantageous manner. In particular, it enables wear-free, since contactless, sensing of information stored in a magnetic or magnetizable medium.

[0086] Furthermore, the method according to the invention is insensitive to and independent of defined relative velocities, since the method according to the invention uses sensors that do not rely on inductive signal generation. Reference symbol list

[0087] 1 Carrier body 2 Coding field 3 Boundaries 4 Medium 4a Barcode 4b QR code 4c Pattern 5 Sensor device 6 Sensor 6b Matrix sensor 6c Sensor array 6d Line sensor 6e Point sensor 7 Housing 8 Sensor device field of view 9 Sub-area 10 Sensor device field of view boundary 20 Evaluation unit 21 Output unit d distance d max maximum sensing distance v rel relative velocity v relmax maximum relative velocity w, x, y, zRows W, X, Y, ZColumns 100Base plate 101Premagnetizer 102, 103Arrows

Claims

1. Method for reading information from a one- or multidimensional coding field (2), wherein the information is stored within boundaries (3) of the coding field (2) and wherein the information is present in the one- or multidimensional coding field (2) by means of a magnetic and / or magnetizable medium (4) and a magnetically sensitive sensor device (5) is used to read out the information, comprising the steps: a) locally bringing together the one- or multidimensional coding field (2) and the sensor device (5) at a distance (d) less than or equal to a maximum sensing distance (dmax); b) aligning the sensor device (5) relative to the coding field (2) in such a way that a sensor device field of view (8) covers at least part of the subarea (9) of the one- or multidimensional coding field (2), the subarea (9) containing the information; c) sensing the information in a sensing step at once or sequentially in at least one suitable alignment position using the sensor device (5) in at least one or more point detections, line detections, and / or at least one matrix detection for the information; d) wherein the information is captured during the capture reading process in such a way that no relative readout movement of a point sensor, line sensor, or matrix sensor of the sensor device (5) is performed relative to the coding field (2), characterized in that, prior to sensing the information in the sensing step, at least one PREVIOUS reference information is read out from a predefined edge area of the coding field (2) in a detection step, wherein the PREVIOUS reference information is present in the predefined edge area of the coding field (2) by means of a magnetic and / or magnetizable medium (4), and wherein the sensor result of the PREVIOUS reference information is qualitatively evaluated by comparing the sensed PREVIOUS reference information with a TARGET PREVIOUS reference information.

2. Method according to claim 1, characterized in that, at least after alignment and before sensing, a pre-magnetizing magnetic field is generated along at least one sensor device field of view boundary (10), which acts on the magnetic and / or magnetizable material.

3. Method according to claim 1 or 2, characterized in that at least after alignment and before sensing, at least one pre-magnetizing magnetic field is generated within the sensor device field of view (8) in a point-like and / or line-like and / or area-like manner.

4. Method according to claim 1 or 2, characterized in that the pre-magnetizing magnetic field(s) is / are maintained during sensing, in particular is / are maintained in an attenuated form.

5. Method according to claim 2 or 3, characterized in that, after sensing the information and the sensing step, in a second detection step, at least one AFTER reference information is read out from the coding field (2) and, by comparing the sensed AFTER reference information with a TARGET AFTER reference information, the sensing result of the AFTER reference information is qualitatively evaluated.

6. Method according to claim 5, characterized in that a qualitative evaluation of the sensing result, which was sensed between the BEFORE reference information and the sensed AFTER reference information, is performed from a sensing result relating to the BEFORE reference information and a sensing result relating to the AFTER reference information.

7. Method according to any one of the preceding claims, characterized in that, for optical recognition of the sensor device field of view (8), the sensor device field of view boundaries (10) or a centering point or a centering line are projected in an optically visible manner onto a carrier body (1) which carries the one- or multidimensional coding field (2).

8. Method according to any one of the preceding claims, characterized in that, for reading a 1D code, preferably a barcode, a line sensor (6d) constructed from at least two individual sensor elements is used as the sensor device (5).

9. Method according to any one of the preceding claims, characterized in that, for the two-dimensional reading of the information, a sensor array (6c) havingat least two rows with at least two individual sensor elements each sequentially captures the information row by row and / or column by column within a capture process.

10. Method according to any one of the preceding claims, characterized in that, after a capture process, a point sensor (6e), a line sensor (6d), or a matrix sensor (6b) is moved within a housing (7) of the sensor device (5) to a further capturing position of the point / line and / or matrix sensors, and after the movement to the further capturing position, a further capture process is carried out with the point / line and / or matrix sensors stationary relative to the housing (7).

11. Method according to claim 10, characterized in that the movement to further capturing positions and the capture in further capturing positions are performed sequentially until the required information contained in the coding field (2) is captured.

12. Method according to claim 10, characterized in that the movement of the point / line and / or matrix sensors within the sensor device (5) is carried out in a linear, row-shaped, column-shaped, or arc-shaped stepped manner.

13. Method according to claim 10, characterized in that the movement of the point / line and / or matrix sensors within the sensor device (5) is performed in a grid-like manner.

14. Method according to any one of the preceding claims, characterized in that a maximum relative velocity (vrelmax) between the sensor device (5) and the coding field (2) is up to half the extension of the coding field (2) per second in the direction of the relative velocity (vrel).

15. Method according to claim 10, characterized in that during the capture, the point / line and / or matrix sensors are moved within the housing (7) of the sensor device (5) between the coding field (2) and the housing (7) in the direction of the relative velocity (vrel), in particular are moved so quickly that a maximum relative velocity (vrelmax) suitable for static capture is not exceeded between the point / line and / or matrix sensors and the coding field (2).

16. Method according to any one of the preceding claims, characterized in that captured data is fed as a matrix, row by row or column by column, serially or in parallel, to an evaluation unit (20) which is designed and set up in such a way that the data received serially or in parallel is used to generate outputting of resulting overall information concerning the content of the coding field (2).