SIGNAL PROCESSING DEVICE, SPEED MEASURING DEVICE, SPEED MEASURING SYSTEM AND VEHICLE

Description

[0001] The invention relates to a signal processing device according to the preamble of claim 1. The invention further relates to a rotation measuring device, a rotation measuring system and a vehicle.

[0002] Such a signal processing device serves for signal processing for a rotary measuring device. The rotary measuring device comprises a rotary measuring sensor and a rotary measuring body, wherein the rotary measuring body has a number of measuring features arranged along a circular path, which are arranged, in particular, equidistantly.

[0003] A measuring feature can be implemented in different ways depending on the design of the rotary measuring body. For example, the rotary measuring body can have a geometric, optical, or magnetic dimensional representation in the form of measuring features.

[0004] Such rotation measuring devices are generally known, particularly in the field of machines and vehicles. Using a rotation measuring device, the current rotational position of a rotating part, such as a shaft or a wheel, can be determined. Furthermore, the direction of rotation, rotational speed, and other movement- and / or position-related parameters can be determined using a rotation measuring device. A wide variety of rotation measuring sensors are known for a rotation measuring device, each of which is based on a different measuring principle, for example a magnetic, optical, or inductive measuring principle. With a magnetic measuring principle, a voltage change can be output, in particular using a Hall sensor, which is characteristic of the current position of a measuring body relative to the Hall sensor.A Hall sensor advantageously enables reliable position determination regardless of the speed, especially when the rotating part is stationary or rotates relatively slowly.

[0005] From DE 10 2020 103106 A1 a system for crankshaft tooth coding of a crank pulse wheel of a vehicle is known.

[0006] For signal processing, the signal processing device is designed to provide consecutive message sequences. The type of message sequence can usually be specified in an associated data protocol. Data protocols, in particular data sequences, for rotary measuring devices are also known. Thus, a data protocol or a data sequence can generally contain a default specification that specifies a pattern of messages in a provided sequence, i.e., in a so-called message sequence, specifically for providing and transmitting measurement data from the rotary measuring device.

[0007] Thus, a signal processing device mentioned at the outset can be designed to output message sequences, wherein a message sequence has a number of successive messages such that temporally successive messages are assigned to spatially adjacent measurement features in temporal succession, wherein the measurement features interact with the rotation measuring sensor, and each message is made available in a message type selected from a predetermined number of message types.

[0008] The signal processing device mentioned at the outset is designed for outputting message sequences in such a way that a message arranged at a fixed sequence position of the message sequence is a message of a predetermined type which describes a feature property of the associated measurement feature.

[0009] Rotary measuring devices, rotary measuring systems, and signal processing devices, especially electronic signal processing devices, still require improvement in terms of signal processing. This particularly concerns the lowest possible error susceptibility and improved diagnostic capabilities during signal processing.

[0010] It is therefore desirable to provide an improved signal processing device for a rotary measuring device as well as a rotary measuring device and a rotary measuring system.

[0011] This is where the invention comes in. Its object is to provide an improved electronic signal processing device and a rotation measuring device that at least partially eliminates the disadvantages of the prior art. In particular, the aim is to enable the lowest possible susceptibility to errors and improved diagnostic options.

[0012] The object relating to the signal processing device, in particular with a data protocol, is achieved by the invention with a signal processing device of claim 1.

[0013] The invention is based on an initially mentioned, in particular electronic, signal processing device, preferably for a vehicle, for a rotation measuring device with a rotation measuring sensor and a rotary measuring body, wherein the rotary measuring body has a feature number of measuring features.

[0014] The rotary measuring sensor is assigned to the rotary measuring body for the purpose of detecting measuring characteristics, in particular for detecting the measuring characteristics in connection with a rotating movement of the rotary measuring body.

[0015] For signal processing, the signal processing device is designed to provide successive message sequences.

[0016] A message sequence has a number of messages such that each message is assigned a measurement feature, and each respective message of the number of messages is assigned a different measurement feature of the number of features.

[0017] A message arranged at a fixed sequence position in the message sequence is a message of a predetermined type that describes a feature property of the associated measurement feature. This applies to at least one message arranged at a fixed sequence position within the message sequence; multiple messages of a predetermined type can also be provided, each of which describes a feature property of the associated measurement feature.

[0018] According to the invention, the signal processing device is designed to generate the message sequences such that the number of messages and the number of features are relatively prime to one another.

[0019] For the purposes of this application, "coprimeness" means that there is no natural number other than "1" that divides both the number of messages and the number of features.

[0020] In general, two natural numbers are said to be coprime if there is no natural number other than "1" that divides them. Relatively prime is also a synonym for coprime. relatively prime or coprime used. If two natural numbers have no common prime factor, they are coprime. This definition implies that every natural number is coprime to "1," including the number "1" itself. In other words, a fraction of two coprime numbers cannot be reduced. To prove coprimity, one usually calculates the greatest common divisor. Two numbers are coprime if and only if "1" is their greatest common divisor. In this sense, the property of coprimeness is to be understood as meaning that there is no natural number other than "1" that divides both the message count and the feature count.

[0021] The inventive feature of "coprimality" preferably applies equally to all message sequences.

[0022] By generating the message sequence or message sequences in such a way that the number of messages and the number of features are relatively prime to one another, a changing assignment between a message sequence and the measurement features acquired by the message sequence is achieved; ie an assignment that changes with each measurement cycle or with each rotation of the rotary measuring body.

[0023] In other words, the concept of the invention achieves the effect that individual measuring features are not repeatedly "skipped" with each rotation of the rotary measuring body.

[0024] The "spatially adjacent" measurement characteristic" preferably means an "immediately adjacent measurement characteristic," so in general it means "the next characteristic after a previous one in a defined sequence of characteristics." Accordingly, "chronologically consecutive messages" preferably means "directly consecutive messages" and, moreover, means the temporal analogue—i.e., it is a message sequence and a measurement characteristic sequence in which an element (message / measurement characteristic) "n+1" follows a previous "n." The background is the binding to a fixed sequence or a fixed relationship of an assignment.

[0025] Above all, the assignment preferably exists between immediately adjacent measurement characteristics and the messages that follow one another in time. Thus, "immediate" should primarily mean that "in the sequence of measurement characteristics, the next measurement characteristic follows without an intervening measurement characteristic," and "immediate in time" should mean the temporal analogue in which a message follows the previous message "without an intervening message." In a variation, another (possibly unused) element may lie between two elements (message / measurement characteristic); however, the commitment to a fixed sequence or a fixed relationship of an assignment between adjacent measurement characteristics and the messages that follow one another in time remains.

[0026] In short, this means that a message sequence has a number of consecutive messages such that temporally consecutive messages are assigned to spatially adjacent measurement features that interact with the rotation measuring sensor one after the other.

[0027] In a second aspect, the invention provides a rotation measuring device for a rotating part, preferably for a vehicle, particularly preferably for a shaft or a wheel of a vehicle, comprising: a rotation measuring sensor with a measured value pickup, a rotary measuring body, and a signal processing device according to a first aspect of the invention, which is connected to the measured value pickup in a signal-conducting manner. Advantageously, the signal processing device is integrated into the rotation measuring sensor, particularly advantageously housed together with the measured value pickup in a housing.

[0028] Preferably, the rotary measuring body has a number of measuring features, in particular wherein the measuring features are arranged along a circular path and / or equidistantly. The rotary measuring sensor is assigned to the rotary measuring body for detecting measuring features, in particular for detecting the measuring features in conjunction with a rotating movement of the rotary measuring body.

[0029] In a third aspect, the invention leads to a rotation measuring system, preferably for a vehicle, comprising at least one rotation measuring device according to the second aspect of the invention, and an assignment unit which is designed to assign the message of a predetermined type arranged at a selection position of the message sequence, in particular a status message of a message sequence, to a measurement feature.

[0030] In a fourth aspect, the invention provides a vehicle comprising a rotation measuring device according to the second aspect of the invention. The vehicle is preferably a passenger car or a commercial vehicle.

[0031] A rotation measuring device according to the second aspect or a rotation measuring system according to the third aspect of the invention can be used particularly advantageously in a vehicle, since the signal processing device according to the first aspect of the invention achieves a reduced susceptibility to errors and / or improved diagnostic capabilities of the rotation measuring device in an improved manner. This can advantageously increase, in particular, the safety and reliability of the vehicle.

[0032] According to a fifth aspect of the invention, a method is provided for signal processing for a rotation measuring device having a rotation measuring sensor and a rotary measuring body, wherein the rotary measuring body has a number of measurement features, wherein the method for signal processing comprises the step of: providing successive message sequences, in particular by the signal processing device, wherein a message sequence has a number of successive messages such that temporally successive messages are assigned to spatially adjacent measurement features interacting one after the other with the rotation measuring sensor, and each message is provided in a message type selected from a predetermined number of message types, and a message arranged at a fixed sequence position of the message sequence is a message of a predetermined type,which describes a characteristic property of the associated measurement characteristic.

[0033] In the method according to the fifth aspect, it is provided that the message sequences are generated such that the number of messages and the number of features are relatively prime to each other.

[0034] In a preferred embodiment, the rotary measuring system comprises an electronic control unit (ECU), which is particularly advantageously implemented within a computing and data processing device. The signal processing device and / or the electronic control unit (ECU) can advantageously be a microcontroller; for example, an ASIC (application-specific integrated circuit) component. ASIC, also custom chip).

[0035] Advantageously, the signal processing device and / or the electronic control unit (ECU) has a communication interface, for example, an antenna or similar wireless communication interface, to the measuring sensor. The measuring sensor of the rotary measuring sensor is assigned to the rotary measuring body for detecting measurement characteristics, in particular for detecting the measurement characteristics in connection with a rotating movement of the rotary measuring body. The electronic control unit can advantageously comprise an allocation unit and / or an allocation memory and / or a diagnostic unit.

[0036] The method is advantageously designed in the form of a computer-implemented method comprising the steps of the method for signal processing.

[0037] According to a sixth aspect of the invention, a computer program product is provided, wherein the computer program product comprises instructions which, when the program is executed by a computer or similar electronic control unit (ECU), in a particularly advantageous manner within the framework of a computing and data processing unit, cause the latter to carry out the steps of the method according to the fifth aspect.

[0038] Advantageous developments of the invention can be found in the subclaims and specify in detail advantageous possibilities for implementing the concept explained above within the scope of the task and with regard to further advantages. It is also to be understood that the signal processing device, preferably with an associated data protocol, according to the first aspect of the invention, the rotation measuring device according to the second aspect of the invention, the rotation measuring system according to the third aspect of the invention, the vehicle according to the fourth aspect of the invention, the method according to the fifth aspect of the invention and the computer program product according to the sixth aspect of the invention have the same and similar sub-aspects, as are defined in particular in the subclaims. In this respect, for the development of one aspect of the invention, reference is also made to the developments of the other aspects of the invention.

[0039] Advantageously, the measuring features are arranged along a circular path and / or equidistantly on the rotary measuring body.

[0040] A measurement feature is advantageously formed by properties of the rotary measuring body, in particular by the geometric, optical or magnetic properties of the rotary measuring body. In addition to recording a continuous measurement signal that describes the current rotational position of the rotating part, it has proven advantageous to define measurement features via characteristic, in particular reliably detectable, locations on the rotary measuring body. Thus, a measurement feature can be arranged at a location of a local maximum or minimum characteristic of the rotary measuring body, for example at a location of locally maximum or minimum magnetization or radial extension (e.g. at the maximum of a tooth tip or the minimum of a tooth valley) or the like. A combination is also possible, so that a measurement feature is formed by each local maximum and each local minimum.

[0041] Alternatively or additionally, a measurement feature can be formed by other properties of the rotary measuring body, advantageously by the location of a local change, in particular maximum change, --generally of a property or a transition between properties--of the rotary measuring body.

[0042] Such a location can be formed, for example, by a tooth flank at the transition from a tooth crest to a tooth valley, or by a transition between two magnetic poles. It should therefore be understood that one or more measuring features can be assigned to a measuring element on the rotary measuring body, for example, a tooth or a tooth-valley pairing or a magnetic pole.

[0043] In a preferred embodiment—which is also described in more detail with reference to the embodiments as a magnet wheel (target)—a rotary measuring body can be implemented as a magnet wheel (target). Nevertheless, a wide variety of implementation variants of this or other embodiments are possible, e.g., as a gear wheel, perforated wheel, or magnetized wheel, for example, in the form of a drum, disk, or the like. Reference here to a magnet wheel (target) as an embodiment is in no way restrictive, but rather is to be understood as an example to explain a general principle.

[0044] A data protocol is understood to be a rule governing the sequence of messages provided by the signal processing device or the rotary measuring device. The data protocol can therefore serve solely to define a data sequence. In further developments, the data protocol can include additional rules, for example, to specify the length and / or coding of individual messages.

[0045] Advantageously, the message of a predetermined type, which is arranged at a fixed sequence position within the message sequence and describes a feature property of the associated measurement feature, is a status message according to a data protocol. In this advantageous development, the at least one predetermined message of each message sequence, which is arranged at a fixed sequence position within the message sequence, is therefore preferably a status message describing a feature property of the associated measurement feature. It can then advantageously be achieved with the message sequence of the electronic signal processing device according to the concept of the invention that a status message is gradually provided for a larger number of measurement features of the rotary measuring body—i.e., with each measurement cycle or rotation of the rotary measuring body.

[0046] This advantageously results in better error detection; this applies in particular to the status messages describing the characteristics of an assigned measurement characteristic.

[0047] In particular, it is achieved that a message sequence in a measuring cycle is assigned a number of measurement features that are different from the measurement features that were recorded in a previous measuring cycle or previous rotation of the rotary measuring body. By such an alternating assignment of the successive message sequences to the measurement features - and thus assignment of the messages - it is advantageously achieved that the message of a predetermined type, in particular a status message - which is always arranged at the same position in the order of the message sequence - also receives an alternating assignment to a measurement feature. This advantageously achieves that a larger number of measurement features is recorded by a message of a predetermined type, in particular a status message.

[0048] Advantageously, the signal processing device is designed as an electronic signal processing device, in particular with a protocol assignment according to which the message of a predetermined type is designed as a status message. For simplicity, this message of a predetermined type is referred to below as a status message, although it should generally be noted that in individual cases, it can also be understood as a message of a predetermined type according to the concept of the invention, regardless of a data protocol.

[0049] Due to the evaluation of unpredictable message times, which will be explained in more detail below, each sensor is advantageously connected to the signal processing device as the evaluating device via a separate, "dedicated" electrical line. Preferably, the signal processing device is also designed as an electronic signal processing device through the interface of an electrical line to the sensor, in particular a separate electrical line specifically configured for evaluation.

[0050] Preferably, a quotient of the number of features and the number of messages is not an integer; this means a quotient of the number of features in the numerator and the number of messages in the denominator. The fact that the quotient of the number of features and the number of messages is not an integer means that when the number of features is divided by the number of messages, a remainder always remains. The number of messages is therefore always composed of a part that is divisible by an integer and a remainder. In particular, this integer non-divisibility also includes cases in which the number of features of measurement features is smaller than the number of messages per message sequence. In other words, according to the development, the number of features of measurement features is not an integer multiple of the number of messages per message sequence.

[0051] This can be explained, for example, in comparison to a possible electronic signal processing device which, with a number of messages of 10 messages in a message sequence and a number of features of 60 measurement features, has a number of features of 60 which is divisible by the number of messages of 10.

[0052] In this disadvantageous example of a possible electronic signal processing device, the result is that with each rotation of the rotary measuring body, the same measurement characteristics are assigned to a message sequence, and thus the status messages are always assigned to a—in particular, significantly smaller—subset of measurement characteristics. Thus, errors, for example, due to mechanical damage or another defect in the rotary measuring body, cannot be detected in measurement characteristics that do not belong to this subset.

[0053] According to the concept of the invention or in particular the aforementioned further development, errors such as a wobble error of the rotary measuring body can advantageously be detected at an early stage - even with a limited measurement resolution or measurement data processing, for example already with a 3-bit representation of the measured values ​​or messages.

[0054] In an advantageous development, an associated data protocol is provided, which provides a message sequence with a number of messages in a sequence, and the successive message sequences are part of the data protocol. A data protocol is generally understood as a specification of a schema of messages within a cyclically provided sequence, i.e., a so-called message sequence, specifically for providing and transmitting measurement data.

[0055] Preferably, the last message of the message sequence is the status message. This means that the fixed sequence position is at the last sequence position of the message sequence. Preferably, the remaining messages of the message sequence are channel messages. Preferably, exactly one message of the message sequence is a status message. A status message generally describes a feature property of a measurement feature according to the concept of the invention and, in particular, unlike messages of other types, can describe status information that provides information about the operating state, in particular about any error states, of the measurement feature and in particular of the rotary measuring device.

[0056] It is nevertheless generally understood that the "actual rotation measurement information" of the messages does not generally have to be contained in the data content of the messages, but rather lies primarily in the initiation, in particular the transmission, of the message itself; thus, preferably in the time at which the transmission of the message is initiated by the rotation measurement sensor.

[0057] Whenever one of the measuring features of the rotary measuring body, in particular a pole or tooth of a magnet wheel, "passes" the rotary measuring sensor on its circular path, the rotary measuring sensor sends a message. This is initially independent of the type of message, i.e., it concerns a status message mentioned above as well as a channel message, which will be explained later. Depending on the rotational speed, messages of any type follow one another at different speeds on a "line," such as a transmission channel, connection, or interface, between the rotary measuring sensor and the signal evaluation device. For example, a measure of its current rotational speed can be derived as rotary measurement information, particularly from the time interval between successive messages—given the known geometry of the rotary measuring body.

[0058] The time interval between two or more messages—regardless of the message type—allows conclusions to be drawn about the rotational speed. In a further development, the rotational measurement information can additionally or alternatively be contained in the number of messages provided by the rotational measurement sensor. This number allows conclusions to be drawn about the rotational movement performed by the rotary measuring body, which, for example, allows for incremental rotational position determination.

[0059] This or another type of rotation measurement information can now preferably "also" be contained in a channel message. A channel message refers in particular to a message, in particular a numerical value, that describes a rotation measurement information item. A rotation measurement information item is preferably a value provided by the rotation measurement sensor, in particular together with a timestamp, and can—depending on the selected operating mode of the rotation measurement device—be, for example, position or speed information. A channel message, in particular together with a timestamp, thus describes a rotation measurement information item of the rotation measurement device. In one development, the rotation measurement information item can be located only in the timestamp at which a message is provided. In a preferred development, the signal processing device or the rotation measurement sensor can be configured to provide a timestamp for a message, in particular for each message.

[0060] Preferably, the number of messages per message sequence is constant for each message sequence. Preferably, the data protocol comprises consecutive message sequences. Preferably, the consecutive messages of a message sequence are assigned to consecutive measurement characteristics.

[0061] Within the scope of a preferred development, it is provided that the data protocol for the signal processing device is an AK protocol or a data protocol based on the AK protocol. A protocol in the form of an AK protocol is preferred, in particular in version 4.0 according to the "Requirement Specifications for Standardized Interface for Wheel Speed Sensors with Additional Information 'AK-Protokoll". This represents a preferred scheme of messages within a cyclically provided sequence, a so-called message sequence, for providing and transmitting measurement data.

[0062] The AK protocol provides a cyclic sequence of a constant, even number of messages. Specifically, such a protocol provides a sequence of nine so-called channel messages, which are used to determine the rotational position, rotational speed, and / or other motion- or position-related parameters, as well as a status message, which is used to determine status data such as temperature or a so-called peak-to-peak value.

[0063] Status messages, particularly those according to the AK protocol, include, for example, peak-to-peak messages, temperature messages, or similar diagnosis-related status messages that can be provided for each measurement characteristic. A status message is advantageously designed as a peak-to-peak message or as a temperature message according to the nature of an AK protocol, particularly one in version 4.0.

[0064] A message is referred to as a "word," particularly according to the AK protocol. A channel message is referred to as a "channel selected" or "channel selected word," particularly according to the AK protocol. Generally speaking, with regard to the previously explained development of the inventive concept with regard to a protocol, it should be understood that, regardless of their time of occurrence—regardless of the type of message—all messages convey further information in their "words," the meaning of which, however, depends on the message type. The aforementioned channel messages are preferably "externally" of the same format (e.g., 9 bits) as the status messages. The type of message sent in each case depends on the data protocol.

[0065] According to the AK protocol, a status message can be referred to as a "Peak-Peak Information Word," "Temperature Information Word," "Overtemperature Word," "EEPROM-Write Required Word," or "EEPROM-Write Counter Exceeded Word." An AK protocol is used, for example, in the ATS sensors from Allegro MicroSystems, Manchester, NH, USA, such as the ATS604 model.

[0066] Within the framework of a particularly preferred further training, it is planned that the number of messages is a prime number. Preferably, the number of messages is a prime number that does not occur in the prime factorization of the number of features. Particularly advantageously, the number of messages is the smallest of the prime numbers that does not occur in the prime factorization or a prime number that is smaller than each of the prime numbers that does occur in the prime factorization. In a further development in which the number of messages is the smallest prime number that does not occur in the prime factorization of the number of features, it is advantageously achieved that all measurement features are recorded relatively quickly.

[0067] A further advantage becomes clear when considering rotary measuring bodies, such as pole wheels with, for example, 5x7=35 or 7x11=77 teeth. In both cases, the fundamentally advantageous effect of the inventive concept is already achieved with a message count of 13 or a similar prime number. However, with a message count of 2, an even faster recording of the properties of all poles, in particular the teeth of one of the aforementioned pole wheels, or generally the measurement characteristics of a rotary measuring body - even a message count of 3 would be possible here with the aforementioned further advantage of even faster recording of the properties.

[0068] In a further development, the message count is the next highest prime number of the highest factor of the prime product of the number of features. This means that the message count is a prime number that does not occur as a factor in the prime product of the number of features.

[0069] A prime number product refers to the decomposition of the number of features into its prime factors, determined by prime factorization. For example, if, as with a number of features of 60, the prime factorization results in a corresponding prime number product of 2 x 2 x 3 x 5, the prime number 5 results as the highest factor of the prime number product. Accordingly, according to this refinement, the prime number 7, as the next highest prime number, would be the number of messages in the message sequence. A message number according to this refinement advantageously ensures that a status message is generated for virtually every measurement feature of the rotary measuring body, albeit only after a large number of revolutions.

[0070] For a prime number that—in contrast to the embodiment described here—is part of the prime number product, for example, with a message count of two with an even number of features, a status message would always generate only half of the measurement features. By choosing the next higher prime number as the message count (and in particular not an arbitrary, even higher prime number), it is advantageously achieved that a status message is generated for each measurement feature after the smallest possible number of revolutions. However, in other embodiments, other numbers, especially prime numbers, are also possible as the message count.

[0071] As part of a preferred further training, a first message sequence type and a second message sequence type are provided, which alternate one after the other, wherein the first message sequence type has a first status message, in particular a peak-to-peak message, and the second message sequence type has a second status message, in particular a temperature message. In such developments, different types of status messages can advantageously be recorded and assigned to a measurement feature, in particular to enable the detection of an error state and / or an operating state. Other developments of data protocols can advantageously have further message sequence types, for example three or four, which alternate one after the other in an analogous manner, in particular to advantageously record even further categories of status messages.

[0072] In a preferred embodiment, the number of messages per message sequence is seven. Seven messages has proven to be an advantageous number of messages, particularly for a range of feature numbers, such as 60, 80, 100, or 120.

[0073] Within the scope of a preferred development, it is provided that the number of messages per message sequence is seven and the message sequence comprises a first status message at the fourth position of the message sequence and a second status message at the seventh position of the message sequence, wherein preferably the first status message is a peak-to-peak message and the second status message is a temperature message.

[0074] As part of a preferential further training, it is planned that the message sequence has at least one status message, in particular two status messages.

[0075] As part of a preferential further training, it is planned that the message sequence comprises a sequence of six channel messages, one status message in the form of a peak-to-peak message, six channel messages, and one status message in the form of a temperature message.

[0076] As part of a preferred further development of the rotary measuring device, it is planned that The rotary measuring body is designed as a gear, in particular a measuring feature is designed as a tooth-valley pairing consisting of a tooth crest and a tooth valley. The rotary measuring body preferably has 60, 80, 100, or 120 measuring features. In other embodiments, the number of features may vary.

[0077] Preferably, the electronic signal processing device or the rotation measuring sensor has an evaluation unit which is designed to provide the data protocol according to the first aspect of the invention as a function of a measuring voltage of the rotation measuring sensor.

[0078] Within the scope of a preferred development of the rotary measuring system, an assignment unit is provided which is designed to assign a message of a predetermined type of a message sequence to a measurement feature in the form of a value tuple, in particular based on the number of messages. For assignment to a measurement feature, each measurement feature can advantageously be assigned a feature index, in particular in the form of an integer numbering. The value tuple can advantageously comprise further components, in particular an index for assigning the value tuple in a table.

[0079] Within the scope of a preferred development of the rotary measuring system, an allocation memory, in particular an allocation table, is provided, which is designed to store an allocated message of a predetermined type, in particular the value tuple, for one or more measurement features. The allocation memory can be formed by a database, a flash memory, or similar suitable storage means.

[0080] Within the scope of a preferred development of the rotary measuring system, an evaluation unit is provided, configured to detect an error state and / or an operating state depending on the at least one measurement feature assigned to the message of a predetermined type, in particular depending on the at least one value tuple. The evaluation unit can be implemented as a software module, in particular in the electronic control unit, or as a hardware module.

[0081] Embodiments of the invention will now be described below with reference to the drawings in comparison to the prior art, some of which is also shown. These are not necessarily intended to represent the embodiments to scale; rather, where useful for explanation, the drawings are schematic and / or slightly distorted. With regard to additions to the teachings immediately apparent from the drawings, reference is made to the relevant prior art. It should be noted that many modifications and changes to the form and detail of an embodiment can be made without departing from the general idea of ​​the invention. The features of the invention disclosed in the description, the drawings and the claims can be essential for further developing the invention, both individually and in any combination.Furthermore, all combinations of at least two of the features disclosed in the description, the drawings, and / or the claims fall within the scope of the invention. The general idea of ​​the invention is not limited to the exact form or detail of the preferred embodiment shown and described below, or to an object that would be limited compared to the object claimed in the claims. For specified dimensioning ranges, values ​​within the stated limits are also intended to be disclosed as limit values ​​and can be used and claimed as desired.

[0082] Further advantages, features and details of the invention will become apparent from the following description of the preferred embodiments and from the drawing, which shows: Fig. 1 shows a schematically illustrated preferred embodiment of a rotation measuring device according to the second aspect of the invention, with a signal processing device according to the first aspect of the invention, which is designed to provide successive message sequences according to a data sequence Fig. 2A, Fig. 2B each show a data protocol for preferred embodiments of a signal processing device according to the first aspect of the invention, Fig. 3 shows a schematic illustration of a preferred allocation memory with an allocation table for assigning a number of status messages to a respective measurement feature, Fig. 4 shows a schematic structure of a message with message bits, Fig. 5A shows a perspective view of a preferred embodiment of a rotation measuring device according to the second aspect of the invention, Fig. 5B shows a perspective view of another preferred rotary measuring body designed as a crown wheel, Fig.6 a schematically illustrated preferred embodiment of a vehicle according to the third aspect of the invention, comprising a rotation measuring device according to the second aspect of the invention. .

[0083] Fig. 1 shows a schematically illustrated embodiment of a rotation measuring system 300 with a rotation measuring device 200. The rotation measuring device 200 has a rotation measuring sensor 220 and a rotary measuring body 240. The rotation measuring sensor 220 here has a measured value pickup 221, which is designed as a Hall sensor 222. The Hall sensor 222 is aligned in a measuring direction MR with respect to the rotary measuring body 240, for example, a pole wheel. The rotary measuring body 240 is rotationally rigidly connected to a rotating part 1100, for example, a wheel 540 of a vehicle 1000, in order to detect its rotational movement R. The known mode of operation of a Hall sensor 222 is described in simplified form in such a way that, depending on the presence of a measuring feature 250 in the measuring field of the Hall sensor 222 - described here in simplified form by the measuring direction MR - an induced measuring voltage UM is provided by the Hall sensor 222.

[0084] For example, in the presence of a tooth tip 256 on a pole wheel, as a preferred embodiment of the rotary measuring body, a higher measuring voltage UM is provided than in the presence of a tooth valley 258, although this assignment may also deviate, for example depending on the orientation of the Hall sensor 222. Other properties, primarily of the sensor, may also be taken into account, for example, in particular a selection of the Hall elements of the Hall sensor 222.

[0085] In the present case, a tooth crest 256 and a subsequent tooth valley 258 together form a tooth-valley pairing 254. In the present case, a tooth-valley pairing 254 forms a measurement feature 250.

[0086] Nevertheless, as mentioned above for another embodiment, a different assignment is possible, for example, by each tooth flank 259 forming a measurement feature 250. In this case, two measurement features 250 would result within a tooth-valley pairing 254; namely, a first for a tooth flank rising in the direction of rotation and a second for a tooth flank falling in the direction of rotation.

[0087] In this case, the rotation measuring device 200 further comprises an electronic signal processing device 260, which is designed to provide a data protocol 100. The signal processing device 260 is integrated in the rotation measuring sensor 220 and is connected to the measured value transducer 221 in a signal-conducting manner. In other embodiments, the signal processing device 260 can also be implemented in other electronic components. In other embodiments, the signal processing device 260 can be implemented, for example, as a hardware or software module in a higher-level, in particular central, electronic control device 700, for example a vehicle control unit 702. The signal processing device 260 has an evaluation unit 262.

[0088] The rotation measuring system 300 in this case has an allocation unit 1200, an allocation memory 1240, and a diagnostic unit 1260, which are arranged in an electronic control device 700. The signal processing device 260 is configured to provide information according to the data protocol 100 as a function of the measurement voltage UM of the Hall sensor 222, specifically with one message 120 per measurement feature 250 that has passed the rotation measuring sensor 220. The signal processing device 260 or the rotation measuring sensor 220 can advantageously be configured to provide a timestamp for each message 120.

[0089] In particular, a message 120 is generated immediately after the corresponding measurement feature 250 has passed, and when the message number A of the message sequence 110 is reached, ie when a quantity of measurement features 250 corresponding to the message number A has passed the rotation measuring sensor 220, the message number A of messages 120 is provided as the message sequence 110.

[0090] The allocation unit 1200 is designed to capture those messages 120 from the data protocol 100 that are messages of a predetermined type 123, in particular status messages 124, and to assign them to the respective measurement feature 250. For this purpose, a feature index MIN or a number can advantageously be provided for each measurement feature 250 of the rotary measuring body 240. The value tuple can advantageously comprise further components, in particular an index IN for assigning the value tuple. The value tuple consisting of the feature index MIN, index IN, and status message 124 can advantageously be stored in the allocation memory 1240, in particular with an allocation table 1242. To clarify: with an exemplary feature number MA of 80, the index IN would be incremented to 240 (U x MA = 3 x 80) shortly before completing a third revolution U of the rotary measuring body 240.The feature index MIN, which always starts again from the beginning when counting up after reaching the feature number MA, would accordingly be 80 (and would start again at 1 for the next measurement feature at the beginning of the fourth revolution).

[0091] Regardless of their time of occurrence, messages 120 convey additional information in their so-called "words," the meaning of which, however, depends on the message type and the type of data protocol. In a preferred embodiment, this can be the AK data protocol mentioned below or a data protocol in general.

[0092] For example, depending on the type of data protocol, "channel select" information can be transmitted in the "words" of so-called channel messages. This is a property primarily of the sensor and primarily specifies a selection of the Hall elements of the Hall sensor 222, for example, which two of the three Hall elements contained in the sensor were used. This generally possible selection of the Hall elements, which must be performed in the specific version, is performed independently by the Hall sensor 222 or rotation measuring sensor 220, in such a way that the voltages generated by the selected Hall elements are as non-simultaneous as possible.

[0093] This ensures that the sensor can detect the direction of rotation as accurately as possible from the relative temporal position of the two Hall element voltages. This aforementioned "channel select" mechanism is thus exemplary of a specific implementation of the concept of the invention; the concept of the invention is to be understood more generally, and the following embodiments with respect to a specific type of Hall sensor 222 or rotation measuring sensor 220 or a specific type of data protocol are in no way limiting the generally understood concept of the invention.

[0094] The data protocol or, in accordance with a data sequence, defines which message type NT is being sent in each case, or which is the message of a predetermined type according to the general concept of the invention. In the present exemplary embodiment, the message of a predetermined type 123 is a status message 124 according to a data protocol 100. The message type NT of the message 120 of a message sequence 110 can be classified by the signal processing device 260 or similar evaluation unit solely based on the sequence defined by the data protocol 100.

[0095] However, the message type NT can also be additionally or alternatively encoded in the message 120, for example, in certain bits of the message's "word." The signal processing device 260 or similar evaluation unit can then identify the message type regardless of the order.

[0096] By means of the diagnostic unit 1260, diagnostic functions can be realized on the basis of the messages of a predetermined type 123, in particular status messages 124, stored in the allocation memory 1240.

[0097] For example, based on a set of peak-to-peak messages 125, each of which can be assigned to a measurement feature 250, a wobble error FT of the rotary measuring body 240 and / or the rotating part 1100 can be inferred. A wobble error FT exists in particular when the rotary measuring body 240 and / or the rotating part 1100 no longer rotate about a rotation axis AR, but have a deviating rotation axis. Statistical methods such as regression, averaging, and the like can be used for this purpose. Likewise, outliers for identifying errors F of the measurement features 250, for example mechanical errors in the tooth-valley pairing 254, a tooth error FZ, can be determined by the diagnostic unit 1260, for example by means of fixed or dynamically adjustable limit values.

[0098] In general, a "peak-to-peak" message transmits a measure of the absolute magnitude of the voltage changes as the current measurement feature moves past the sensor. Missing or damaged teeth, or interdental spaces filled with metal debris, result in a weaker magnetic field change as the sensor moves past, resulting in smaller voltage changes (smaller peak-to-peak value).

[0099] The rotary measuring device 200 further comprises a rotary measuring body 240, which is shown here only in section and in a rolled-out state, in which the - actually circular arc-shaped course - of alternating tooth crests 256 and tooth valleys 258 is shown here running straight. The rotary measuring body 240 is designed as a gearwheel 242 with a message number A of measuring features 250, wherein the measuring features 250 are each designed as a tooth-valley pairing 254. Each tooth crest 256 and an adjacent tooth valley 258 together form a tooth-valley pairing 254. A measuring feature 250 can have one or more feature properties 280, which can be expressed in dimensions, temperatures, or similar state parameters. A feature property 280 is, in particular, measurable and can advantageously allow conclusions to be drawn about the state of the measuring feature 250.

[0100] An example is Fig. 1 Another processing unit 264 is shown, which also uses or further processes the data from the rotation measuring device 200 based on the data protocol 100. In particular, position- and / or movement-related parameters can be determined based on the channel messages 122, advantageously based on the time stamps of the channel messages 122, such as an angular position RW, i.e., rotational position, or a rotational speed RV of the rotating part 1100.

[0101] Fig. 2A schematically shows a preferred embodiment of a signal processing device with data protocol 100 as a cyclic sequence of message sequences 110, of which one message sequence 110 is shown in detail. The message sequence 110 of the data protocol 100 has a message count A of seven messages 120 in a sequence RF. Each message is located at a sequence position PS, two of which are designated here as examples.

[0102] The message sequence 110 has a message of a predetermined type 123 in the form of a status message 124. The status message 124 is located at a fixed sequence position PSF for each message sequence 110. In the present case, the last message 120 of a message sequence 110 is embodied as a status message 124, i.e., the fixed sequence position PSF is located at a last sequence position PSL of the message sequence 110. The status message 124 describes a feature property 280 of the measurement feature 250 assigned to it.

[0103] In the present case, the predetermined type message 123 is embodied as a so-called peak-to-peak message 125, which describes, in the form of a numerical value, a voltage difference of the voltage induced in the Hall sensor between the highest and lowest points of a tooth-valley pairing 254. The peak-to-peak message 125 thus characterizes an actual height difference between a tooth tip 256 and a tooth valley 258 in a measuring direction MR. Using the peak-to-peak message 125, defects in the rotary measuring body 240, for example, a damaged, in particular broken, tooth tip 256 or a clogged tooth valley 258, can be identified.A wobble or similar kinematic error of the rotary measuring body 240 can also be detected more effectively if a status message 124, in particular a peak-to-peak message 125, is present for each measurement feature 250, particularly because such tendencies are detected earlier even with a relatively low measurement resolution. A message 120, in particular a channel message 122 or a status message 124, is preferably embodied as a 3-bit value and can thus assume a value between 0 and 7. In other embodiments, the status message 124 can be embodied differently, for example, as a temperature message 126 that describes a temperature T at the rotation measuring sensor 220. In other embodiments, the message 120 can be embodied differently according to the data protocol 100, for example, as a 9-bit value.

[0104] In Fig. 2B A further preferred embodiment of a data protocol 100 is shown, in which a first message sequence type 110.1 and a second message sequence type 110.2 alternate. The first message sequence type 110.1 and the second message sequence type 110.2 differ in that their predetermined type messages 123 are status messages 124 of different types. This means that the predetermined type message 123 in the first message sequence type 110.1 is of a different message type NT than the predetermined type message 123 in the second message sequence type 110.2. In the present case, a first status message 124.1 of the first message sequence type 110.1 is designed as a peak-to-peak message 125 and a second status message 124.2 of the second message sequence type 110.2 is designed as a temperature message 126. The first status message 124.1 and the second status message 124.2 thus each describe a different feature property 280 of a measurement feature 250. In such an embodiment, different types of diagnostic information can advantageously be determined on the basis of the different types of status messages, in particular - after a sufficient number of messages of revolutions U - advantageously for each measurement feature 250 of the rotary measuring body 240. Thus, for example, as in the example shown here, both a peak-to-peak message 125 and - in a correspondingly later pass or message sequence 110 - a temperature message 126 can be provided for each measurement feature 250.

[0105] In such an embodiment, a peak-to-peak message 125 is provided as status message 124 and a temperature message 126 is provided as status message 124 alternately with each message sequence 110.

[0106] However, other embodiments of data protocols with a larger number of messages of successive message sequence types are possible within the scope of the invention, each with different types of status messages.

[0107] In the data protocol described here as an example in the form of an AK protocol, nine channel messages 122 are generated consecutively, followed by a status message 124. A concrete example according to a sensor operating according to the AK protocol, for example, an ATS sensor from Allegro, such as the ATS604 model: A message sequence can be as follows: Nine times "Channel-Selected" (especially for the mounting position of the sensor), one time "Peak-Peak Information" (voltage difference of the Hall sensor between pole and gap, especially tooth tip and tooth valley), nine times "Channel-Selected" (especially regarding the mounting position of the sensor), one time "Temperature Information" (sensor temperature).

[0108] After the message sequence has been executed, it is repeated. Common rotary measuring bodies, especially pole wheels, can, for example, have a feature count, particularly tooth count, of 60, 80, 100, or 120. This would result in "peak-to-peak information" or "peak-to-peak information" for only every tenth feature, particularly every twentieth pole or tooth tip.

[0109] In a preferred embodiment, the repetition cycle of the "peak-to-peak information" must not be an integer divisor of the number of features, for example, in this embodiment, the number of teeth, in order to ensure that "peak-to-peak information" is provided for each feature, for example, in this embodiment, each pole or each tooth tip, over a number of revolutions.

[0110] A corresponding message sequence in such a preferred embodiment is, for example, as follows: Six times "Channel-Selected" (especially for the mounting position of the sensor), one time "Peak-Peak Information" (voltage difference of the Hall sensor between pole and gap, especially tooth tip and tooth valley), six times "Channel-Selected" (especially regarding the mounting position of the sensor), one time "Temperature Information" (sensor temperature).

[0111] In this way, the "peak-to-peak information" is provided for every fourteenth feature, in particular every fourteenth tooth or pole, and fourteen is not an integer divisor of 60, 80, 100, or 120. Thus, with each revolution of the rotary measuring body, here the gear or pole wheel, "peak-to-peak information" is provided for other features, in particular poles or tooth tip or tooth-valley pairings.

[0112] In a particularly preferred embodiment, the message sequence is formed as follows: Three times "Channel-Selected" (especially for the mounting position of the sensor), one time "Peak-Peak Information" (voltage difference of the Hall sensor between pole and gap, especially tooth tip and tooth valley), two times "Channel-Selected" (especially regarding the mounting position of the sensor), one time "Temperature Information" (sensor temperature).

[0113] In such an embodiment, the number of messages A is seven, and thus both the peak-to-peak information and the temperature information are provided for every seventh measurement feature. This advantageously requires a relatively small number of revolutions U to capture all measurement features.

[0114] Depending on the number of features, here the number of teeth, all poles are taken into account or recorded after a certain number of revolutions.

[0115] Fig. 3 schematically shows an allocation memory 1240 with an allocation table 1242. The allocation table 1242 describes, in particular, the structure of a database or memory according to which the messages 120 provided by the rotation measuring device 200 according to the data protocol 100 are stored and can be retrieved. An allocation memory 1240 is designed, in particular, to store messages of a predetermined type 123, and thus enables the messages of a predetermined type 123 to be retained across measuring cycles, in particular for analysis and diagnostic purposes. A measuring cycle within the meaning of this description includes the provision of a single message sequence 110.

[0116] In the present case, the allocation table 1242 has a number of rows AZ of rows Z, which corresponds to the number of features AM. Thus, an allocation of values, in particular of status messages 124, to an individual measurement feature 250 is possible. In particular, each row Z is numbered with a feature index MIN for allocation to a measurement feature 250. In the present case, the first fifteen rows Z for the first fifteen measurement features 250.1 to 250.15 are shown as an example. The allocation memory 1240 and the allocation table 1242 for the Fig. 2B shown embodiment of a data protocol 100 is represented with a first message sequence type 110.1 and a subsequent second message sequence type 110.2. The first seven lines are to be assigned to a first message sequence 110 of the first message sequence type 110.1, the following seven lines to a second message sequence 110 of the second message sequence type 110.2. The fifteenth line assigned to the measurement feature 250.15 thus forms the beginning, i.e. the first message, of a third message sequence 110 of the first message sequence type 110.1. For each category of status messages 124, a column S can be provided in the assignment table 1242; in the present case, this is a first column S1 for the first status message 124.1 designed as a peak-to-peak message 125, and a second column S2 for the second status message 124.2 designed as a temperature message 126.During operation of the rotary measuring device 200, the status messages 124 are thus gradually stored, in particular by an allocation unit 1200, according to their type in the corresponding column S1, S2. In particular, the channel messages 122 are not considered during storage. With each measuring cycle, i.e., with each message sequence 110, a further value of a status message 124 is thus included in the allocation table 1242. Alternatively or additionally, the number of rows AZ can be a different number that is different from the number of features AM. Alternatively or additionally to the feature index MIN, each row Z can have an index IN for assigning each row Z in the allocation table 1242. A value tuple 130 is advantageously stored in each row Z.

[0117] Fig. 4 schematically shows an advantageous structure of a message 120. A message 120 is advantageously constructed by a number of message bits 178. Preferably, each message 120 has the same structure, in particular the same number of message bits 178. In the present case, the message 120 has nine message bits 178, which are numbered accordingly from a first message bit 178.1 to a ninth message bit 178.9. It is therefore a 9-bit message. In the message 120 shown here, the first message bit 178.1 and the second message bit 178.2 advantageously form a property identifier 180, by means of which the message type NT of a message 120 can be advantageously identified. In this way, the property identifier 180 can advantageously be used to indicate whether the message 120 is a channel message 122 or a message of a predetermined type 123, such asa peak-to-peak message 125 or temperature message 126. In other embodiments of signal processing devices 260, the structure of a message 120 may be different, in particular, may have more or fewer message bits 178, or may have a property identifier 180 at a different location in the message 120.

[0118] Fig. 5A shows a perspective view of a rotary measuring device 200 according to the second aspect of the invention. The rotary measuring body 240 is designed as a gear 242 in the form of a spur gear 244, which has a feature number AM of measurement features 250, which are designed as a tooth-valley pairing 254 and are arranged equidistantly along a circular path 248 on the gear 242. The rotary measuring body 240 is, in particular, torsionally rigidly connected to a rotating part 1100 (not shown here) in order to metrologically detect a rotational movement R of the rotary measuring body 240—and thus of the rotating part 1100. The greater the feature number A, the smaller the metrologically detectable sections of the rotary measuring body 240. One revolution U corresponds to a movement of the rotary measuring body 240 by 360° around the rotation axis AR. With a feature number MA of 60, a measurement feature 250 extends over a circular segment of 6°.The greater the number of features MA, the more accurately the rotational movement R, in particular a rotational speed RV or angular position RW, can be detected. A gear 242 within the meaning of the invention comprises any body with, in particular, a rotationally symmetrical base body and a number of geometric features which vary the distance to a rotation measuring sensor 220 with respect to the measuring direction MR during a rotational movement R. For the purpose of measurement, it is particularly sufficient if a tooth tip is rectangular, that is to say as shown here in . Fig. 5A shown as vertically rising and falling in the tangential direction. The rotation measuring sensor 220 comprises a measuring sensor 221 in the form of a Hall sensor 222. In the preferred embodiment shown here, the rotation measuring sensor 220 advantageously comprises the signal processing device 260.

[0119] Other forms of gears 242 are also possible, for example a crown gear 246 with tooth tips 256 formed in the axial direction, as shown here by way of example in Fig. 5B shown.

[0120] Fig. 6shows a highly schematic view of a vehicle 1000 with a rotation measuring system 300 having four rotation measuring devices 200 according to the second aspect of the invention. The vehicle 1000 can, as shown here, be designed as a passenger car 1002. In other embodiments, the vehicle 1000 can be designed differently, for example as a commercial vehicle 1004. The vehicle has two axles 530, namely a front axle 532 and a rear axle 534. The rear axle 534 is driven by a drive 1102 via a drive shaft 1104 and a differential 1106. Two wheels 540 are attached to each axle 530. On the front axle 532, a first wheel 540.1 with a first rotation measuring device 200.1 and a second wheel 540.2 with a second rotation measuring device 200.2 are arranged, on the rear axle 534, a third wheel 540.3 with a third rotation measuring device 200.3 and a fourth wheel 540.4 with a fourth rotation measuring device 200.4 are arranged.The respective wheel 540 thus represents the rotating part 1100 for the associated rotation measuring device 200. The first rotation measuring device 200.1 is connected to an electronic control device 700 in the form of a vehicle control unit 702 via a first rotation measuring signal line 710.1. The electronic control device 700 has an allocation unit 1200, an allocation memory 1240, and a diagnostic unit 1260. In a similar manner, the remaining rotation measuring devices 200.2, 200.3, 200.4 are each connected to the electronic control device 700 via a rotation measuring signal line 710.2, 710.3, 710.4. In embodiments, the electronic signal processing device 260 or the allocation unit 1200, the allocation memory 1240 or the diagnostic unit 1260 may be arranged as a hardware or software module in another electronic control unit. List of reference symbols (part of the description)

[0121] 100 Data protocol 110 Message sequence 110.1, 110.2 First, second message sequence type 120 Message 122 Channel messages 124 Status messages 124.1, 124.2 First, second status message 125 Peak-to-peak message 126 Temperature message 130 Value tuple 178 Message bit 178.1 - 178.9 First to ninth message bit 180 Property identifier 200 Rotary measuring device 200.1-4 First to fourth rotary measuring device 220 Rotary measuring sensor 221 Transducer 222 Hall sensor 240 Rotary scale 242 Gear 244 Spur gear 246 Crown gear 248 Circular path 250 Measurement feature 254 Tooth-valley pairing 256Tooth tip 258Tooth valley 259Tooth flank 260Signal processing device 262Evaluation unit 264Further processing unit 280Feature property 530Axle 532Front axle 534Rear axle 540Wheel 540.1-4First to fourth wheel 700Electronic control device 702Vehicle control unit 710Rotation measuring signal line 710.1-4 first to fourth rotation measuring signal line 1000 vehicle 1002 passenger car 1004 commercial vehicle 1100 rotating part 1102 drive 1104 drive shaft 1106 differential 1200 allocation unit 1240 allocation memory 1242 allocation table 1260 diagnostic unit . AMessage count AMFeature count ARRotation axis AZLine count FErrors FTTWobble error FZZTooth error INIndex MAFeature count MRMeasurement direction NTMessage type PSSequence position PSFFixed sequence position PSLLast sequence position RRotational movement RFSequence RVRotational speed RWAngular position SSolve URevolutions UMMeasurement voltage ZLine

Claims

1. Signal-processing device (260), preferably for a vehicle (1000), for signal processing for a rotation-measuring device (200), which rotation-measuring device has a rotation-measuring sensor (220) and a rotary measuring body (240), wherein the rotary measuring body (240) has a feature quantity (AM) of measurement features (250), wherein - for signal processing, the signal-processing device (260) is configured to provide temporally successive message sequences (110), and - a message sequence (110) has a message quantity (A) of successive messages (120) such that - temporally successive messages (120) are assigned in temporal succession to spatially adjacent measurement features (250), wherein the measurement features (250) interact with the rotation-measuring sensor (220), and each message (120) is provided in a message type (NT, C, T, P) selected from a predetermined quantity of message types, and - a message (120) arranged at a fixed sequence position (PSF) of the message sequence (110) is a message of a predetermined type (123) which describes a feature property (280) of the assigned measurement feature (250), characterized in that - the signal-processing device (260) is configured to generate the message sequences (110) such that the message quantity (A) and the feature quantity (AM) are relatively prime.

2. Signal-processing device (260) according to claim 1, characterized in that a quotient of the feature quantity (AM) and the message quantity (A) is not an integer.

3. Signal-processing device (260) according to claim 1 or 2, characterized in that - the message quantity (A) is a prime number, in particular a smaller or smallest prime number not occurring in the prime factorization of the feature quantity (AM).

4. Signal-processing device (260) according to any of claims 1 to 3, characterized in that - each message sequence (110) is generated such that the message quantity (A) and the feature quantity (AM) are relatively prime, and / or - the message quantity (A) of successive messages (120) are provided in an order (RF) predetermined by an assigned data protocol (100) and the successive message sequences (110) are provided in an order predetermined by the assigned data protocol (100).

5. Signal-processing device (260) according to any of claims 1 to 4, characterized in that - the message (120) of predetermined type (123) is a status message (124) according to a data protocol (100), in particular, a last message (120) of the message sequence (110) is the status message (124).

6. Signal-processing device (260) according to any of the preceding claims, characterized in that - a first message sequence type (110.1) and a second message sequence type (110.2) succeed one another alternately, wherein the first message sequence type (110.1) has a first status message (124.1), in particular a peak-to-peak message (125), and the second message sequence type (110.2) has a second status message (124.2), in particular a temperature message (126).

7. Signal-processing device (260) according to any of the preceding claims, characterized in that a data protocol (100) is an AK protocol (102), in particular the message quantity (A) is seven.

8. Signal-processing device (260) according to any of the preceding claims, characterized by an electrical interface for connection to a separate electrical line to the rotation-measuring sensor (240).

9. Rotation-measuring device (200) for a rotating part (1100), preferably for a vehicle (1000), particularly preferably for a shaft or a wheel (540) of a vehicle (1000), having: - a rotation-measuring sensor (220), - a rotary measuring body (240) which has a feature quantity (AM) of measurement features (250), in particular wherein the measurement features (250) are arranged along a circular path (248) and / or equidistantly, - a signal-processing device (260) according to any of claims 1 to 8, which is connected to the measured-value sensor (221) in a signal-carrying manner.

10. Rotation-measuring device (200) according to claim 9, characterized in that - the rotary measuring body (240) is configured as a gear wheel (242), in particular a measurement feature (250) is configured as a tooth-root pairing (254) consisting of a tooth tip (256) and a tooth root (258).

11. Rotation-measuring system (300), preferably for a vehicle (1000), characterized by - at least one rotation-measuring device (200) according to claim 9 or 10, - an assignment unit (1200) which is configured to assign the message (120) of a predetermined type arranged at a fixed sequence position (PSF) of the message sequence (110), in particular a status message (124) of a message sequence (110), to a measurement feature (250).

12. Rotation-measuring system (300) according to claim 11, characterized in that the assignment is given in the form of a value tuple (130), based on the message quantity (A), preferably according to an assigned data protocol (100).

13. Rotation-measuring system (300) according to claim 11 or 12, characterized by - an assignment memory (1240), in particular an assignment table (1242), which is configured to store an assigned message of a predetermined type (123), in particular the value tuple (130), for each of one or more measurement features (250).

14. Rotation-measuring system (300) according to any of claims 11 to 13, characterized by - a diagnostic unit (1260) configured to detect an error state (ZF) and / or an operating state (ZB) on the basis of the at least one measurement feature (250) assigned to the message of a predetermined type (123), in particular on the basis of the at least one value tuple (130).

15. Vehicle (1000), comprising a rotation-measuring device (200), in particular for a shaft or a wheel of the vehicle (1000), according to any of claims 9 or 10 and / or a rotation-measuring system (300) according to any of claims 11 to 14.